From c06b3a068223cb885d85ac4f6c31e870ca2b5aac Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Mon, 31 Jan 2011 15:07:53 +0100
Subject: microblaze: Do not use r0_ram space for hw exception debugging

Remove hw exception counting space from r0_ram. Use special
exception_debug_table poll for exception statistic.

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/kernel/hw_exception_handler.S b/arch/microblaze/kernel/hw_exception_handler.S
index 782680d..ec5e99d 100644
--- a/arch/microblaze/kernel/hw_exception_handler.S
+++ b/arch/microblaze/kernel/hw_exception_handler.S
@@ -77,6 +77,8 @@
 #include <asm/signal.h>
 #include <asm/asm-offsets.h>
 
+#undef DEBUG
+
 /* Helpful Macros */
 #define NUM_TO_REG(num)		r ## num
 
@@ -228,6 +230,16 @@
 /* wrappers to restore state before coming to entry.S */
 
 #ifdef CONFIG_MMU
+#ifdef DEBUG
+/* Create space for exception counting. */
+.section .data
+.global exception_debug_table
+.align 4
+exception_debug_table:
+	/* Look at exception vector table. There is 32 exceptions * word size */
+	.space	(32 * 4)
+#endif /* DEBUG */
+
 .section .rodata
 .align 4
 _MB_HW_ExceptionVectorTable:
@@ -329,12 +341,12 @@ not_in_delay_slot:
 
 #ifdef DEBUG
 /* counting which exception happen */
-	lwi	r5, r0, 0x200 + TOPHYS(r0_ram)
+	lwi	r5, r0, TOPHYS(exception_debug_table)
 	addi	r5, r5, 1
-	swi	r5, r0, 0x200 + TOPHYS(r0_ram)
-	lwi	r5, r6, 0x200 + TOPHYS(r0_ram)
+	swi	r5, r0, TOPHYS(exception_debug_table)
+	lwi	r5, r6, TOPHYS(exception_debug_table)
 	addi	r5, r5, 1
-	swi	r5, r6, 0x200 + TOPHYS(r0_ram)
+	swi	r5, r6, TOPHYS(exception_debug_table)
 #endif
 /* end */
 	/* Load the HW Exception vector */
-- 
cgit v0.10.2


From 601149775158ea825326734c2db5d90190249bd7 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Fri, 18 Feb 2011 14:29:20 +0100
Subject: microblaze: Fix unaligned.h for endians

Synchronized with mips unaligned.h.

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/include/asm/unaligned.h b/arch/microblaze/include/asm/unaligned.h
index 2b97cbe..b162ed8 100644
--- a/arch/microblaze/include/asm/unaligned.h
+++ b/arch/microblaze/include/asm/unaligned.h
@@ -12,18 +12,19 @@
 
 # ifdef __KERNEL__
 
-# include <linux/unaligned/be_byteshift.h>
-# include <linux/unaligned/le_byteshift.h>
-# include <linux/unaligned/generic.h>
-
-
 #  ifdef __MICROBLAZEEL__
+#   include <linux/unaligned/le_struct.h>
+#   include <linux/unaligned/be_byteshift.h>
 #   define get_unaligned	__get_unaligned_le
 #   define put_unaligned	__put_unaligned_le
 #  else
+#   include <linux/unaligned/be_struct.h>
+#   include <linux/unaligned/le_byteshift.h>
 #   define get_unaligned	__get_unaligned_be
 #   define put_unaligned	__put_unaligned_be
 #  endif
 
+# include <linux/unaligned/generic.h>
+
 # endif	/* __KERNEL__ */
 #endif /* _ASM_MICROBLAZE_UNALIGNED_H */
-- 
cgit v0.10.2


From 495162dfefe3f6e3a8e908aa2f0a964a572d3e87 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Mon, 31 Jan 2011 14:57:26 +0100
Subject: microblaze: Optimize BE/LE bootup detecting

Save 0x1 word to rodata section and remove online value
loading if DTB is passed from bootloader. It saves two
asm instructions in bootup.

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/kernel/head.S b/arch/microblaze/kernel/head.S
index 778a5ce..d8dc085 100644
--- a/arch/microblaze/kernel/head.S
+++ b/arch/microblaze/kernel/head.S
@@ -39,7 +39,7 @@
 #include <asm/mmu.h>
 #include <asm/processor.h>
 
-.data
+.section .data
 .global empty_zero_page
 .align 12
 empty_zero_page:
@@ -50,6 +50,11 @@ swapper_pg_dir:
 
 #endif /* CONFIG_MMU */
 
+.section .rodata
+.align 4
+endian_check:
+	.word	1
+
 	__HEAD
 ENTRY(_start)
 #if CONFIG_KERNEL_BASE_ADDR == 0
@@ -79,10 +84,7 @@ real_start:
 /* Does r7 point to a valid FDT? Load HEADER magic number */
 	/* Run time Big/Little endian platform */
 	/* Save 1 as word and load byte - 0 - BIG, 1 - LITTLE */
-	addik	r11, r0, 0x1 /* BIG/LITTLE checking value */
-	/* __bss_start will be zeroed later - it is just temp location */
-	swi	r11, r0, TOPHYS(__bss_start)
-	lbui	r11, r0, TOPHYS(__bss_start)
+	lbui	r11, r0, TOPHYS(endian_check)
 	beqid	r11, big_endian /* DO NOT break delay stop dependency */
 	lw	r11, r0, r7 /* Big endian load in delay slot */
 	lwr	r11, r0, r7 /* Little endian load */
-- 
cgit v0.10.2


From d8748e73e882106ff0ffa0fa2192dab111a9f9f8 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Mon, 31 Jan 2011 15:04:43 +0100
Subject: microblaze: Do not use r0_ram space for syscall debugging

Remove syscall counting space from r0_ram. Use special
syscall_debug_table pool for syscall statistic.

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S
index 41c30cd..5010f0b 100644
--- a/arch/microblaze/kernel/entry.S
+++ b/arch/microblaze/kernel/entry.S
@@ -39,6 +39,15 @@
 /* The offset of the struct pt_regs in a `state save frame' on the stack. */
 #define PTO	STATE_SAVE_ARG_SPACE /* 24 the space for args */
 
+#ifdef DEBUG
+/* Create space for syscalls counting. */
+.section .data
+.global syscall_debug_table
+.align 4
+syscall_debug_table:
+	.space	(__NR_syscalls * 4)
+#endif /* DEBUG */
+
 #define C_ENTRY(name)	.globl name; .align 4; name
 
 /*
@@ -371,10 +380,14 @@ C_ENTRY(_user_exception):
 	add	r12, r12, r12;
 
 #ifdef DEBUG
-	/* Trac syscalls and stored them to r0_ram */
-	lwi	r3, r12, 0x400 + r0_ram
+	/* Trac syscalls and stored them to syscall_debug_table */
+	/* The first syscall location stores total syscall number */
+	lwi	r3, r0, syscall_debug_table
+	addi	r3, r3, 1
+	swi	r3, r0, syscall_debug_table
+	lwi	r3, r12, syscall_debug_table
 	addi	r3, r3, 1
-	swi	r3, r12, 0x400 + r0_ram
+	swi	r3, r12, syscall_debug_table
 #endif
 
 	# Find and jump into the syscall handler.
-- 
cgit v0.10.2


From 6e83557c38b40d6e9d1c82ad0ae59d8e5db9c50c Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Mon, 31 Jan 2011 15:10:04 +0100
Subject: microblaze: Remove r0_ram pointer and PTO alignment

r0_ram pool was used for saving/restoring register
content if hw exception happen. This poll was replaced by
pt_pool_space with PT_SIZE size.
Based on this change SAVE_STATE_ARG_SPACE was removed which
caused that PTO offset is zero that's why is also removed.

r0_ram space was used as scratchpad by v850. In early
Microblaze Linux developing phase was this part of code
blindly copied.

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/include/asm/entry.h b/arch/microblaze/include/asm/entry.h
index ec89f2a..af0144b 100644
--- a/arch/microblaze/include/asm/entry.h
+++ b/arch/microblaze/include/asm/entry.h
@@ -31,40 +31,4 @@ DECLARE_PER_CPU(unsigned int, R11_SAVE); /* Temp variable for entry */
 DECLARE_PER_CPU(unsigned int, CURRENT_SAVE); /* Saved current pointer */
 # endif /* __ASSEMBLY__ */
 
-#ifndef CONFIG_MMU
-
-/* noMMU hasn't any space for args */
-# define STATE_SAVE_ARG_SPACE	(0)
-
-#else /* CONFIG_MMU */
-
-/* If true, system calls save and restore all registers (except result
- * registers, of course).  If false, then `call clobbered' registers
- * will not be preserved, on the theory that system calls are basically
- * function calls anyway, and the caller should be able to deal with it.
- * This is a security risk, of course, as `internal' values may leak out
- * after a system call, but that certainly doesn't matter very much for
- * a processor with no MMU protection!  For a protected-mode kernel, it
- * would be faster to just zero those registers before returning.
- *
- * I can not rely on the glibc implementation. If you turn it off make
- * sure that r11/r12 is saved in user-space. --KAA
- *
- * These are special variables using by the kernel trap/interrupt code
- * to save registers in, at a time when there are no spare registers we
- * can use to do so, and we can't depend on the value of the stack
- * pointer.  This means that they must be within a signed 16-bit
- * displacement of 0x00000000.
- */
-
-/* A `state save frame' is a struct pt_regs preceded by some extra space
- * suitable for a function call stack frame. */
-
-/* Amount of room on the stack reserved for arguments and to satisfy the
- * C calling conventions, in addition to the space used by the struct
- * pt_regs that actually holds saved values. */
-#define STATE_SAVE_ARG_SPACE	(6*4) /* Up to six arguments */
-
-#endif /* CONFIG_MMU */
-
 #endif /* _ASM_MICROBLAZE_ENTRY_H */
diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h
index 8eeb092..aed2a6b 100644
--- a/arch/microblaze/include/asm/processor.h
+++ b/arch/microblaze/include/asm/processor.h
@@ -155,7 +155,7 @@ unsigned long get_wchan(struct task_struct *p);
 #  define task_regs(task) ((struct pt_regs *)task_tos(task) - 1)
 
 #  define task_pt_regs_plus_args(tsk) \
-	(((void *)task_pt_regs(tsk)) - STATE_SAVE_ARG_SPACE)
+	((void *)task_pt_regs(tsk))
 
 #  define task_sp(task)	(task_regs(task)->r1)
 #  define task_pc(task)	(task_regs(task)->pc)
diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S
index 5010f0b..ff949e3 100644
--- a/arch/microblaze/kernel/entry.S
+++ b/arch/microblaze/kernel/entry.S
@@ -33,12 +33,6 @@
 
 #undef DEBUG
 
-/* The size of a state save frame. */
-#define STATE_SAVE_SIZE		(PT_SIZE + STATE_SAVE_ARG_SPACE)
-
-/* The offset of the struct pt_regs in a `state save frame' on the stack. */
-#define PTO	STATE_SAVE_ARG_SPACE /* 24 the space for args */
-
 #ifdef DEBUG
 /* Create space for syscalls counting. */
 .section .data
@@ -181,72 +175,72 @@ syscall_debug_table:
 1:
 
 #define SAVE_REGS \
-	swi	r2, r1, PTO+PT_R2;	/* Save SDA */			\
-	swi	r3, r1, PTO+PT_R3;					\
-	swi	r4, r1, PTO+PT_R4;					\
-	swi	r5, r1, PTO+PT_R5;					\
-	swi	r6, r1, PTO+PT_R6;					\
-	swi	r7, r1, PTO+PT_R7;					\
-	swi	r8, r1, PTO+PT_R8;					\
-	swi	r9, r1, PTO+PT_R9;					\
-	swi	r10, r1, PTO+PT_R10;					\
-	swi	r11, r1, PTO+PT_R11;	/* save clobbered regs after rval */\
-	swi	r12, r1, PTO+PT_R12;					\
-	swi	r13, r1, PTO+PT_R13;	/* Save SDA2 */			\
-	swi	r14, r1, PTO+PT_PC;	/* PC, before IRQ/trap */	\
-	swi	r15, r1, PTO+PT_R15;	/* Save LP */			\
-	swi	r16, r1, PTO+PT_R16;					\
-	swi	r17, r1, PTO+PT_R17;					\
-	swi	r18, r1, PTO+PT_R18;	/* Save asm scratch reg */	\
-	swi	r19, r1, PTO+PT_R19;					\
-	swi	r20, r1, PTO+PT_R20;					\
-	swi	r21, r1, PTO+PT_R21;					\
-	swi	r22, r1, PTO+PT_R22;					\
-	swi	r23, r1, PTO+PT_R23;					\
-	swi	r24, r1, PTO+PT_R24;					\
-	swi	r25, r1, PTO+PT_R25;					\
-	swi	r26, r1, PTO+PT_R26;					\
-	swi	r27, r1, PTO+PT_R27;					\
-	swi	r28, r1, PTO+PT_R28;					\
-	swi	r29, r1, PTO+PT_R29;					\
-	swi	r30, r1, PTO+PT_R30;					\
-	swi	r31, r1, PTO+PT_R31;	/* Save current task reg */	\
+	swi	r2, r1, PT_R2;	/* Save SDA */			\
+	swi	r3, r1, PT_R3;					\
+	swi	r4, r1, PT_R4;					\
+	swi	r5, r1, PT_R5;					\
+	swi	r6, r1, PT_R6;					\
+	swi	r7, r1, PT_R7;					\
+	swi	r8, r1, PT_R8;					\
+	swi	r9, r1, PT_R9;					\
+	swi	r10, r1, PT_R10;					\
+	swi	r11, r1, PT_R11;	/* save clobbered regs after rval */\
+	swi	r12, r1, PT_R12;					\
+	swi	r13, r1, PT_R13;	/* Save SDA2 */			\
+	swi	r14, r1, PT_PC;	/* PC, before IRQ/trap */	\
+	swi	r15, r1, PT_R15;	/* Save LP */			\
+	swi	r16, r1, PT_R16;					\
+	swi	r17, r1, PT_R17;					\
+	swi	r18, r1, PT_R18;	/* Save asm scratch reg */	\
+	swi	r19, r1, PT_R19;					\
+	swi	r20, r1, PT_R20;					\
+	swi	r21, r1, PT_R21;					\
+	swi	r22, r1, PT_R22;					\
+	swi	r23, r1, PT_R23;					\
+	swi	r24, r1, PT_R24;					\
+	swi	r25, r1, PT_R25;					\
+	swi	r26, r1, PT_R26;					\
+	swi	r27, r1, PT_R27;					\
+	swi	r28, r1, PT_R28;					\
+	swi	r29, r1, PT_R29;					\
+	swi	r30, r1, PT_R30;					\
+	swi	r31, r1, PT_R31;	/* Save current task reg */	\
 	mfs	r11, rmsr;		/* save MSR */			\
-	swi	r11, r1, PTO+PT_MSR;
+	swi	r11, r1, PT_MSR;
 
 #define RESTORE_REGS \
-	lwi	r11, r1, PTO+PT_MSR;					\
+	lwi	r11, r1, PT_MSR;					\
 	mts	rmsr , r11;						\
-	lwi	r2, r1, PTO+PT_R2;	/* restore SDA */		\
-	lwi	r3, r1, PTO+PT_R3;					\
-	lwi	r4, r1, PTO+PT_R4;					\
-	lwi	r5, r1, PTO+PT_R5;					\
-	lwi	r6, r1, PTO+PT_R6;					\
-	lwi	r7, r1, PTO+PT_R7;					\
-	lwi	r8, r1, PTO+PT_R8;					\
-	lwi	r9, r1, PTO+PT_R9;					\
-	lwi	r10, r1, PTO+PT_R10;					\
-	lwi	r11, r1, PTO+PT_R11;	/* restore clobbered regs after rval */\
-	lwi	r12, r1, PTO+PT_R12;					\
-	lwi	r13, r1, PTO+PT_R13;	/* restore SDA2 */		\
-	lwi	r14, r1, PTO+PT_PC;	/* RESTORE_LINK PC, before IRQ/trap */\
-	lwi	r15, r1, PTO+PT_R15;	/* restore LP */		\
-	lwi	r16, r1, PTO+PT_R16;					\
-	lwi	r17, r1, PTO+PT_R17;					\
-	lwi	r18, r1, PTO+PT_R18;	/* restore asm scratch reg */	\
-	lwi	r19, r1, PTO+PT_R19;					\
-	lwi	r20, r1, PTO+PT_R20;					\
-	lwi	r21, r1, PTO+PT_R21;					\
-	lwi	r22, r1, PTO+PT_R22;					\
-	lwi	r23, r1, PTO+PT_R23;					\
-	lwi	r24, r1, PTO+PT_R24;					\
-	lwi	r25, r1, PTO+PT_R25;					\
-	lwi	r26, r1, PTO+PT_R26;					\
-	lwi	r27, r1, PTO+PT_R27;					\
-	lwi	r28, r1, PTO+PT_R28;					\
-	lwi	r29, r1, PTO+PT_R29;					\
-	lwi	r30, r1, PTO+PT_R30;					\
-	lwi	r31, r1, PTO+PT_R31;	/* Restore cur task reg */
+	lwi	r2, r1, PT_R2;	/* restore SDA */		\
+	lwi	r3, r1, PT_R3;					\
+	lwi	r4, r1, PT_R4;					\
+	lwi	r5, r1, PT_R5;					\
+	lwi	r6, r1, PT_R6;					\
+	lwi	r7, r1, PT_R7;					\
+	lwi	r8, r1, PT_R8;					\
+	lwi	r9, r1, PT_R9;					\
+	lwi	r10, r1, PT_R10;					\
+	lwi	r11, r1, PT_R11;	/* restore clobbered regs after rval */\
+	lwi	r12, r1, PT_R12;					\
+	lwi	r13, r1, PT_R13;	/* restore SDA2 */		\
+	lwi	r14, r1, PT_PC;	/* RESTORE_LINK PC, before IRQ/trap */\
+	lwi	r15, r1, PT_R15;	/* restore LP */		\
+	lwi	r16, r1, PT_R16;					\
+	lwi	r17, r1, PT_R17;					\
+	lwi	r18, r1, PT_R18;	/* restore asm scratch reg */	\
+	lwi	r19, r1, PT_R19;					\
+	lwi	r20, r1, PT_R20;					\
+	lwi	r21, r1, PT_R21;					\
+	lwi	r22, r1, PT_R22;					\
+	lwi	r23, r1, PT_R23;					\
+	lwi	r24, r1, PT_R24;					\
+	lwi	r25, r1, PT_R25;					\
+	lwi	r26, r1, PT_R26;					\
+	lwi	r27, r1, PT_R27;					\
+	lwi	r28, r1, PT_R28;					\
+	lwi	r29, r1, PT_R29;					\
+	lwi	r30, r1, PT_R30;					\
+	lwi	r31, r1, PT_R31;	/* Restore cur task reg */
 
 #define SAVE_STATE	\
 	swi	r1, r0, TOPHYS(PER_CPU(ENTRY_SP)); /* save stack */	\
@@ -259,11 +253,11 @@ syscall_debug_table:
 	lwi	r1, r0, TOPHYS(PER_CPU(ENTRY_SP));			\
 	/* FIXME: I can add these two lines to one */			\
 	/* tophys(r1,r1); */						\
-	/* addik	r1, r1, -STATE_SAVE_SIZE; */			\
-	addik	r1, r1, CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START - STATE_SAVE_SIZE; \
+	/* addik	r1, r1, -PT_SIZE; */				\
+	addik	r1, r1, CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START - PT_SIZE; \
 	SAVE_REGS							\
 	brid	2f;							\
-	swi	r1, r1, PTO+PT_MODE; 	 				\
+	swi	r1, r1, PT_MODE; 	 				\
 1:	/* User-mode state save.  */					\
 	lwi	r1, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */\
 	tophys(r1,r1);							\
@@ -271,12 +265,12 @@ syscall_debug_table:
 	/* MS these three instructions can be added to one */		\
 	/* addik	r1, r1, THREAD_SIZE; */				\
 	/* tophys(r1,r1); */						\
-	/* addik	r1, r1, -STATE_SAVE_SIZE; */			\
-	addik r1, r1, THREAD_SIZE + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START - STATE_SAVE_SIZE; \
+	/* addik	r1, r1, -PT_SIZE; */			\
+	addik r1, r1, THREAD_SIZE + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START - PT_SIZE; \
 	SAVE_REGS							\
 	lwi	r11, r0, TOPHYS(PER_CPU(ENTRY_SP));			\
-	swi	r11, r1, PTO+PT_R1; /* Store user SP.  */		\
-	swi	r0, r1, PTO + PT_MODE; /* Was in user-mode.  */		\
+	swi	r11, r1, PT_R1; /* Store user SP.  */		\
+	swi	r0, r1, PT_MODE; /* Was in user-mode.  */		\
 	/* MS: I am clearing UMS even in case when I come from kernel space */ \
 	clear_ums; 							\
 2:	lwi	CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE));
@@ -308,10 +302,10 @@ C_ENTRY(_user_exception):
 	lwi	r1, r0, TOPHYS(PER_CPU(ENTRY_SP)); /* Reload kernel stack-ptr*/
 	tophys(r1,r1);
 
-	addik	r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */
+	addik	r1, r1, -PT_SIZE; /* Make room on the stack. */
 	SAVE_REGS
 
-	swi	r1, r1, PTO + PT_MODE; /* pt_regs -> kernel mode */
+	swi	r1, r1, PT_MODE; /* pt_regs -> kernel mode */
 	brid	2f;
 	nop;				/* Fill delay slot */
 
@@ -324,18 +318,18 @@ C_ENTRY(_user_exception):
 	addik	r1, r1, THREAD_SIZE;
 	tophys(r1,r1);
 
-	addik	r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack.  */
+	addik	r1, r1, -PT_SIZE; /* Make room on the stack.  */
 	SAVE_REGS
-	swi	r0, r1, PTO + PT_R3
-	swi	r0, r1, PTO + PT_R4
+	swi	r0, r1, PT_R3
+	swi	r0, r1, PT_R4
 
-	swi	r0, r1, PTO + PT_MODE;			/* Was in user-mode. */
+	swi	r0, r1, PT_MODE;			/* Was in user-mode. */
 	lwi	r11, r0, TOPHYS(PER_CPU(ENTRY_SP));
-	swi	r11, r1, PTO+PT_R1;		/* Store user SP.  */
+	swi	r11, r1, PT_R1;		/* Store user SP.  */
 	clear_ums;
 2:	lwi	CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE));
 	/* Save away the syscall number.  */
-	swi	r12, r1, PTO+PT_R0;
+	swi	r12, r1, PT_R0;
 	tovirt(r1,r1)
 
 /* where the trap should return need -8 to adjust for rtsd r15, 8*/
@@ -354,18 +348,18 @@ C_ENTRY(_user_exception):
 	beqi	r11, 4f
 
 	addik	r3, r0, -ENOSYS
-	swi	r3, r1, PTO + PT_R3
+	swi	r3, r1, PT_R3
 	brlid	r15, do_syscall_trace_enter
-	addik	r5, r1, PTO + PT_R0
+	addik	r5, r1, PT_R0
 
 	# do_syscall_trace_enter returns the new syscall nr.
 	addk	r12, r0, r3
-	lwi	r5, r1, PTO+PT_R5;
-	lwi	r6, r1, PTO+PT_R6;
-	lwi	r7, r1, PTO+PT_R7;
-	lwi	r8, r1, PTO+PT_R8;
-	lwi	r9, r1, PTO+PT_R9;
-	lwi	r10, r1, PTO+PT_R10;
+	lwi	r5, r1, PT_R5;
+	lwi	r6, r1, PT_R6;
+	lwi	r7, r1, PT_R7;
+	lwi	r8, r1, PT_R8;
+	lwi	r9, r1, PT_R9;
+	lwi	r10, r1, PT_R10;
 4:
 /* Jump to the appropriate function for the system call number in r12
  * (r12 is not preserved), or return an error if r12 is not valid.
@@ -404,10 +398,10 @@ C_ENTRY(_user_exception):
 /* Entry point used to return from a syscall/trap */
 /* We re-enable BIP bit before state restore */
 C_ENTRY(ret_from_trap):
-	swi	r3, r1, PTO + PT_R3
-	swi	r4, r1, PTO + PT_R4
+	swi	r3, r1, PT_R3
+	swi	r4, r1, PT_R4
 
-	lwi	r11, r1, PTO + PT_MODE;
+	lwi	r11, r1, PT_MODE;
 /* See if returning to kernel mode, if so, skip resched &c.  */
 	bnei	r11, 2f;
 	/* We're returning to user mode, so check for various conditions that
@@ -419,7 +413,7 @@ C_ENTRY(ret_from_trap):
 	beqi	r11, 1f
 
 	brlid	r15, do_syscall_trace_leave
-	addik	r5, r1, PTO + PT_R0
+	addik	r5, r1, PT_R0
 1:
 	/* We're returning to user mode, so check for various conditions that
 	 * trigger rescheduling. */
@@ -439,7 +433,7 @@ C_ENTRY(ret_from_trap):
 	andi	r11, r11, _TIF_SIGPENDING;
 	beqi	r11, 1f;		/* Signals to handle, handle them */
 
-	addik	r5, r1, PTO;		/* Arg 1: struct pt_regs *regs */
+	addik	r5, r1, 0;		/* Arg 1: struct pt_regs *regs */
 	addi	r7, r0, 1;		/* Arg 3: int in_syscall */
 	bralid	r15, do_signal;	/* Handle any signals */
 	add	r6, r0, r0;		/* Arg 2: sigset_t *oldset */
@@ -450,7 +444,7 @@ C_ENTRY(ret_from_trap):
 	VM_OFF;
 	tophys(r1,r1);
 	RESTORE_REGS;
-	addik	r1, r1, STATE_SAVE_SIZE		/* Clean up stack space.  */
+	addik	r1, r1, PT_SIZE		/* Clean up stack space.  */
 	lwi	r1, r1, PT_R1 - PT_SIZE;/* Restore user stack pointer. */
 	bri	6f;
 
@@ -459,7 +453,7 @@ C_ENTRY(ret_from_trap):
 	VM_OFF;
 	tophys(r1,r1);
 	RESTORE_REGS;
-	addik	r1, r1, STATE_SAVE_SIZE		/* Clean up stack space.  */
+	addik	r1, r1, PT_SIZE		/* Clean up stack space.  */
 	tovirt(r1,r1);
 6:
 TRAP_return:		/* Make global symbol for debugging */
@@ -472,8 +466,8 @@ TRAP_return:		/* Make global symbol for debugging */
 
 C_ENTRY(sys_fork_wrapper):
 	addi	r5, r0, SIGCHLD			/* Arg 0: flags */
-	lwi	r6, r1, PTO+PT_R1	/* Arg 1: child SP (use parent's) */
-	addik	r7, r1, PTO			/* Arg 2: parent context */
+	lwi	r6, r1, PT_R1	/* Arg 1: child SP (use parent's) */
+	addik	r7, r1, 0			/* Arg 2: parent context */
 	add	r8. r0, r0			/* Arg 3: (unused) */
 	add	r9, r0, r0;			/* Arg 4: (unused) */
 	brid	do_fork		/* Do real work (tail-call) */
@@ -493,12 +487,12 @@ C_ENTRY(ret_from_fork):
 
 C_ENTRY(sys_vfork):
 	brid	microblaze_vfork	/* Do real work (tail-call) */
-	addik	r5, r1, PTO
+	addik	r5, r1, 0
 
 C_ENTRY(sys_clone):
 	bnei	r6, 1f;			/* See if child SP arg (arg 1) is 0. */
-	lwi	r6, r1, PTO + PT_R1;	/* If so, use paret's stack ptr */
-1:	addik	r7, r1, PTO;			/* Arg 2: parent context */
+	lwi	r6, r1, PT_R1;	/* If so, use paret's stack ptr */
+1:	addik	r7, r1, 0;			/* Arg 2: parent context */
 	add	r8, r0, r0;			/* Arg 3: (unused) */
 	add	r9, r0, r0;			/* Arg 4: (unused) */
 	brid	do_fork		/* Do real work (tail-call) */
@@ -506,11 +500,11 @@ C_ENTRY(sys_clone):
 
 C_ENTRY(sys_execve):
 	brid	microblaze_execve;	/* Do real work (tail-call).*/
-	addik	r8, r1, PTO;		/* add user context as 4th arg */
+	addik	r8, r1, 0;		/* add user context as 4th arg */
 
 C_ENTRY(sys_rt_sigreturn_wrapper):
 	brid	sys_rt_sigreturn	/* Do real work */
-	addik	r5, r1, PTO;		/* add user context as 1st arg */
+	addik	r5, r1, 0;		/* add user context as 1st arg */
 
 /*
  * HW EXCEPTION rutine start
@@ -521,7 +515,7 @@ C_ENTRY(full_exception_trap):
 	addik	r17, r17, -4
 	SAVE_STATE /* Save registers */
 	/* PC, before IRQ/trap - this is one instruction above */
-	swi	r17, r1, PTO+PT_PC;
+	swi	r17, r1, PT_PC;
 	tovirt(r1,r1)
 	/* FIXME this can be store directly in PT_ESR reg.
 	 * I tested it but there is a fault */
@@ -531,7 +525,7 @@ C_ENTRY(full_exception_trap):
 	mfs	r7, rfsr;		/* save FSR */
 	mts	rfsr, r0;	/* Clear sticky fsr */
 	rted	r0, full_exception
-	addik	r5, r1, PTO		 /* parameter struct pt_regs * regs */
+	addik	r5, r1, 0		 /* parameter struct pt_regs * regs */
 
 /*
  * Unaligned data trap.
@@ -557,14 +551,14 @@ C_ENTRY(unaligned_data_trap):
 	lwi	r11, r0, TOPHYS(PER_CPU(ENTRY_SP));
 	SAVE_STATE		/* Save registers.*/
 	/* PC, before IRQ/trap - this is one instruction above */
-	swi	r17, r1, PTO+PT_PC;
+	swi	r17, r1, PT_PC;
 	tovirt(r1,r1)
 	/* where the trap should return need -8 to adjust for rtsd r15, 8 */
 	addik	r15, r0, ret_from_exc-8
 	mfs	r3, resr		/* ESR */
 	mfs	r4, rear		/* EAR */
 	rtbd	r0, _unaligned_data_exception
-	addik	r7, r1, PTO		/* parameter struct pt_regs * regs */
+	addik	r7, r1, 0		/* parameter struct pt_regs * regs */
 
 /*
  * Page fault traps.
@@ -587,30 +581,30 @@ C_ENTRY(unaligned_data_trap):
 C_ENTRY(page_fault_data_trap):
 	SAVE_STATE		/* Save registers.*/
 	/* PC, before IRQ/trap - this is one instruction above */
-	swi	r17, r1, PTO+PT_PC;
+	swi	r17, r1, PT_PC;
 	tovirt(r1,r1)
 	/* where the trap should return need -8 to adjust for rtsd r15, 8 */
 	addik	r15, r0, ret_from_exc-8
 	mfs	r6, rear		/* parameter unsigned long address */
 	mfs	r7, resr		/* parameter unsigned long error_code */
 	rted	r0, do_page_fault
-	addik	r5, r1, PTO		/* parameter struct pt_regs * regs */
+	addik	r5, r1, 0		/* parameter struct pt_regs * regs */
 
 C_ENTRY(page_fault_instr_trap):
 	SAVE_STATE		/* Save registers.*/
 	/* PC, before IRQ/trap - this is one instruction above */
-	swi	r17, r1, PTO+PT_PC;
+	swi	r17, r1, PT_PC;
 	tovirt(r1,r1)
 	/* where the trap should return need -8 to adjust for rtsd r15, 8 */
 	addik	r15, r0, ret_from_exc-8
 	mfs	r6, rear		/* parameter unsigned long address */
 	ori	r7, r0, 0		/* parameter unsigned long error_code */
 	rted	r0, do_page_fault
-	addik	r5, r1, PTO		/* parameter struct pt_regs * regs */
+	addik	r5, r1, 0		/* parameter struct pt_regs * regs */
 
 /* Entry point used to return from an exception.  */
 C_ENTRY(ret_from_exc):
-	lwi	r11, r1, PTO + PT_MODE;
+	lwi	r11, r1, PT_MODE;
 	bnei	r11, 2f;		/* See if returning to kernel mode, */
 					/* ... if so, skip resched &c.  */
 
@@ -642,7 +636,7 @@ C_ENTRY(ret_from_exc):
 	 * complete register state.  Here we save anything not saved by
 	 * the normal entry sequence, so that it may be safely restored
 	 * (in a possibly modified form) after do_signal returns. */
-	addik	r5, r1, PTO;		/* Arg 1: struct pt_regs *regs */
+	addik	r5, r1, 0;		/* Arg 1: struct pt_regs *regs */
 	addi	r7, r0, 0;		/* Arg 3: int in_syscall */
 	bralid	r15, do_signal;	/* Handle any signals */
 	add	r6, r0, r0;		/* Arg 2: sigset_t *oldset */
@@ -654,7 +648,7 @@ C_ENTRY(ret_from_exc):
 	tophys(r1,r1);
 
 	RESTORE_REGS;
-	addik	r1, r1, STATE_SAVE_SIZE		/* Clean up stack space.  */
+	addik	r1, r1, PT_SIZE		/* Clean up stack space.  */
 
 	lwi	r1, r1, PT_R1 - PT_SIZE; /* Restore user stack pointer. */
 	bri	6f;
@@ -663,7 +657,7 @@ C_ENTRY(ret_from_exc):
 	VM_OFF;
 	tophys(r1,r1);
 	RESTORE_REGS;
-	addik	r1, r1, STATE_SAVE_SIZE		/* Clean up stack space.  */
+	addik	r1, r1, PT_SIZE		/* Clean up stack space.  */
 
 	tovirt(r1,r1);
 6:
@@ -696,10 +690,10 @@ C_ENTRY(_interrupt):
 	tophys(r1,r1); /* MS: I have in r1 physical address where stack is */
 	/* save registers */
 /* MS: Make room on the stack -> activation record */
-	addik	r1, r1, -STATE_SAVE_SIZE;
+	addik	r1, r1, -PT_SIZE;
 	SAVE_REGS
 	brid	2f;
-	swi	r1, r1, PTO + PT_MODE; /* 0 - user mode, 1 - kernel mode */
+	swi	r1, r1, PT_MODE; /* 0 - user mode, 1 - kernel mode */
 1:
 /* User-mode state save. */
  /* MS: get the saved current */
@@ -709,23 +703,23 @@ C_ENTRY(_interrupt):
 	addik	r1, r1, THREAD_SIZE;
 	tophys(r1,r1);
 	/* save registers */
-	addik	r1, r1, -STATE_SAVE_SIZE;
+	addik	r1, r1, -PT_SIZE;
 	SAVE_REGS
 	/* calculate mode */
-	swi	r0, r1, PTO + PT_MODE;
+	swi	r0, r1, PT_MODE;
 	lwi	r11, r0, TOPHYS(PER_CPU(ENTRY_SP));
-	swi	r11, r1, PTO+PT_R1;
+	swi	r11, r1, PT_R1;
 	clear_ums;
 2:
 	lwi	CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE));
 	tovirt(r1,r1)
 	addik	r15, r0, irq_call;
 irq_call:rtbd	r0, do_IRQ;
-	addik	r5, r1, PTO;
+	addik	r5, r1, 0;
 
 /* MS: we are in virtual mode */
 ret_from_irq:
-	lwi	r11, r1, PTO + PT_MODE;
+	lwi	r11, r1, PT_MODE;
 	bnei	r11, 2f;
 
 	lwi	r11, CURRENT_TASK, TS_THREAD_INFO;
@@ -742,7 +736,7 @@ ret_from_irq:
 	beqid	r11, no_intr_resched
 /* Handle a signal return; Pending signals should be in r18. */
 	addi	r7, r0, 0; /* Arg 3: int in_syscall */
-	addik	r5, r1, PTO; /* Arg 1: struct pt_regs *regs */
+	addik	r5, r1, 0; /* Arg 1: struct pt_regs *regs */
 	bralid	r15, do_signal;	/* Handle any signals */
 	add	r6, r0, r0; /* Arg 2: sigset_t *oldset */
 
@@ -754,7 +748,7 @@ no_intr_resched:
 	VM_OFF;
 	tophys(r1,r1);
 	RESTORE_REGS
-	addik	r1, r1, STATE_SAVE_SIZE /* MS: Clean up stack space. */
+	addik	r1, r1, PT_SIZE /* MS: Clean up stack space. */
 	lwi	r1, r1, PT_R1 - PT_SIZE;
 	bri	6f;
 /* MS: Return to kernel state. */
@@ -782,7 +776,7 @@ restore:
 	VM_OFF /* MS: turn off MMU */
 	tophys(r1,r1)
 	RESTORE_REGS
-	addik	r1, r1, STATE_SAVE_SIZE	/* MS: Clean up stack space. */
+	addik	r1, r1, PT_SIZE	/* MS: Clean up stack space. */
 	tovirt(r1,r1);
 6:
 IRQ_return: /* MS: Make global symbol for debugging */
@@ -805,28 +799,28 @@ C_ENTRY(_debug_exception):
 	lwi	r1, r0, TOPHYS(PER_CPU(ENTRY_SP)); /* Reload kernel stack-ptr*/
 
 	/* BIP bit is set on entry, no interrupts can occur */
-	addik   r1, r1, CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START - STATE_SAVE_SIZE;
+	addik   r1, r1, CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START - PT_SIZE;
 	SAVE_REGS;
 	/* save all regs to pt_reg structure */
-	swi	r0, r1, PTO+PT_R0;	/* R0 must be saved too */
-	swi	r14, r1, PTO+PT_R14	/* rewrite saved R14 value */
-	swi	r16, r1, PTO+PT_PC; /* PC and r16 are the same */
+	swi	r0, r1, PT_R0;	/* R0 must be saved too */
+	swi	r14, r1, PT_R14	/* rewrite saved R14 value */
+	swi	r16, r1, PT_PC; /* PC and r16 are the same */
 	/* save special purpose registers to pt_regs */
 	mfs	r11, rear;
-	swi	r11, r1, PTO+PT_EAR;
+	swi	r11, r1, PT_EAR;
 	mfs	r11, resr;
-	swi	r11, r1, PTO+PT_ESR;
+	swi	r11, r1, PT_ESR;
 	mfs	r11, rfsr;
-	swi	r11, r1, PTO+PT_FSR;
+	swi	r11, r1, PT_FSR;
 
 	/* stack pointer is in physical address at it is decrease
-	 * by STATE_SAVE_SIZE but we need to get correct R1 value */
-	addik   r11, r1, CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR + STATE_SAVE_SIZE;
-	swi	r11, r1, PTO+PT_R1
+	 * by PT_SIZE but we need to get correct R1 value */
+	addik   r11, r1, CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR + PT_SIZE;
+	swi	r11, r1, PT_R1
 	/* MS: r31 - current pointer isn't changed */
 	tovirt(r1,r1)
 #ifdef CONFIG_KGDB
-	addi	r5, r1, PTO /* pass pt_reg address as the first arg */
+	addi	r5, r1, 0 /* pass pt_reg address as the first arg */
 	la	r15, r0, dbtrap_call; /* return address */
 	rtbd	r0, microblaze_kgdb_break
 	nop;
@@ -842,16 +836,16 @@ C_ENTRY(_debug_exception):
 	addik	r1, r1, THREAD_SIZE;	/* calculate kernel stack pointer */
 	tophys(r1,r1);
 
-	addik	r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack.  */
+	addik	r1, r1, -PT_SIZE; /* Make room on the stack.  */
 	SAVE_REGS;
-	swi	r16, r1, PTO+PT_PC;	/* Save LP */
-	swi	r0, r1, PTO + PT_MODE; /* Was in user-mode.  */
+	swi	r16, r1, PT_PC;	/* Save LP */
+	swi	r0, r1, PT_MODE; /* Was in user-mode.  */
 	lwi	r11, r0, TOPHYS(PER_CPU(ENTRY_SP));
-	swi	r11, r1, PTO+PT_R1; /* Store user SP.  */
+	swi	r11, r1, PT_R1; /* Store user SP.  */
 	lwi	CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE));
 	tovirt(r1,r1)
 	set_vms;
-	addik	r5, r1, PTO;
+	addik	r5, r1, 0;
 	addik	r15, r0, dbtrap_call;
 dbtrap_call: /* Return point for kernel/user entry + 8 because of rtsd r15, 8 */
 	rtbd	r0, sw_exception
@@ -859,7 +853,7 @@ dbtrap_call: /* Return point for kernel/user entry + 8 because of rtsd r15, 8 */
 
 	/* MS: The first instruction for the second part of the gdb/kgdb */
 	set_bip; /* Ints masked for state restore */
-	lwi	r11, r1, PTO + PT_MODE;
+	lwi	r11, r1, PT_MODE;
 	bnei	r11, 2f;
 /* MS: Return to user space - gdb */
 	/* Get current task ptr into r11 */
@@ -878,7 +872,7 @@ dbtrap_call: /* Return point for kernel/user entry + 8 because of rtsd r15, 8 */
 	andi	r11, r11, _TIF_SIGPENDING;
 	beqi	r11, 1f;		/* Signals to handle, handle them */
 
-	addik	r5, r1, PTO;		/* Arg 1: struct pt_regs *regs */
+	addik	r5, r1, 0;		/* Arg 1: struct pt_regs *regs */
 	addi  r7, r0, 0;	/* Arg 3: int in_syscall */
 	bralid	r15, do_signal;	/* Handle any signals */
 	add	r6, r0, r0;		/* Arg 2: sigset_t *oldset */
@@ -889,7 +883,7 @@ dbtrap_call: /* Return point for kernel/user entry + 8 because of rtsd r15, 8 */
 	tophys(r1,r1);
 	/* MS: Restore all regs */
 	RESTORE_REGS
-	addik	r1, r1, STATE_SAVE_SIZE	 /* Clean up stack space */
+	addik	r1, r1, PT_SIZE	 /* Clean up stack space */
 	lwi	r1, r1, PT_R1 - PT_SIZE; /* Restore user stack pointer */
 DBTRAP_return_user: /* MS: Make global symbol for debugging */
 	rtbd	r16, 0; /* MS: Instructions to return from a debug trap */
@@ -900,9 +894,9 @@ DBTRAP_return_user: /* MS: Make global symbol for debugging */
 	tophys(r1,r1);
 	/* MS: Restore all regs */
 	RESTORE_REGS
-	lwi	r14, r1, PTO+PT_R14;
-	lwi	r16, r1, PTO+PT_PC;
-	addik	r1, r1, STATE_SAVE_SIZE; /* MS: Clean up stack space */
+	lwi	r14, r1, PT_R14;
+	lwi	r16, r1, PT_PC;
+	addik	r1, r1, PT_SIZE; /* MS: Clean up stack space */
 	tovirt(r1,r1);
 DBTRAP_return_kernel: /* MS: Make global symbol for debugging */
 	rtbd	r16, 0; /* MS: Instructions to return from a debug trap */
diff --git a/arch/microblaze/kernel/hw_exception_handler.S b/arch/microblaze/kernel/hw_exception_handler.S
index ec5e99d..2401fa4 100644
--- a/arch/microblaze/kernel/hw_exception_handler.S
+++ b/arch/microblaze/kernel/hw_exception_handler.S
@@ -93,7 +93,7 @@
 		lwi	r6, r1, PT_R6;		\
 		lwi	r11, r1, PT_R11;	\
 		lwi	r31, r1, PT_R31;	\
-		lwi	r1, r0, TOPHYS(r0_ram + 0);
+		lwi	r1, r1, PT_R1;
 #endif /* CONFIG_MMU */
 
 #define LWREG_NOP			\
@@ -208,8 +208,8 @@
  *      |      .      |
  *      |      .      |
  *
- * NO_MMU kernel use the same r0_ram pointed space - look to vmlinux.lds.S
- * which is used for storing register values - old style was, that value were
+ * MMU kernel uses the same 'pt_pool_space' pointed space
+ * which is used for storing register values - noMMu style was, that values were
  * stored in stack but in case of failure you lost information about register.
  * Currently you can see register value in memory in specific place.
  * In compare to with previous solution the speed should be the same.
@@ -228,8 +228,12 @@
  */
 
 /* wrappers to restore state before coming to entry.S */
-
 #ifdef CONFIG_MMU
+.section .data
+.align 4
+pt_pool_space:
+	.space	PT_SIZE
+
 #ifdef DEBUG
 /* Create space for exception counting. */
 .section .data
@@ -299,10 +303,10 @@ _hw_exception_handler:
 #ifndef CONFIG_MMU
 	addik	r1, r1, -(EX_HANDLER_STACK_SIZ); /* Create stack frame */
 #else
-	swi	r1, r0, TOPHYS(r0_ram + 0); /* GET_SP */
+	swi	r1, r0, TOPHYS(pt_pool_space + PT_R1); /* GET_SP */
 	/* Save date to kernel memory. Here is the problem
 	 * when you came from user space */
-	ori	r1, r0, TOPHYS(r0_ram + 28);
+	ori	r1, r0, TOPHYS(pt_pool_space);
 #endif
 	swi	r3, r1, PT_R3
 	swi	r4, r1, PT_R4
diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c
index ba7c4b1..968648a 100644
--- a/arch/microblaze/kernel/process.c
+++ b/arch/microblaze/kernel/process.c
@@ -159,7 +159,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
 	}
 
 	/* FIXME STATE_SAVE_PT_OFFSET; */
-	ti->cpu_context.r1  = (unsigned long)childregs - STATE_SAVE_ARG_SPACE;
+	ti->cpu_context.r1  = (unsigned long)childregs;
 	/* we should consider the fact that childregs is a copy of the parent
 	 * regs which were saved immediately after entering the kernel state
 	 * before enabling VM. This MSR will be restored in switch_to and
diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c
index d8d3bb3..580d052 100644
--- a/arch/microblaze/kernel/signal.c
+++ b/arch/microblaze/kernel/signal.c
@@ -93,7 +93,7 @@ static int restore_sigcontext(struct pt_regs *regs,
 asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
 {
 	struct rt_sigframe __user *frame =
-		(struct rt_sigframe __user *)(regs->r1 + STATE_SAVE_ARG_SPACE);
+		(struct rt_sigframe __user *)(regs->r1);
 
 	sigset_t set;
 	int rval;
@@ -247,7 +247,7 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 		goto give_sigsegv;
 
 	/* Set up registers for signal handler */
-	regs->r1 = (unsigned long) frame - STATE_SAVE_ARG_SPACE;
+	regs->r1 = (unsigned long) frame;
 
 	/* Signal handler args: */
 	regs->r5 = signal; /* arg 0: signum */
diff --git a/arch/microblaze/kernel/vmlinux.lds.S b/arch/microblaze/kernel/vmlinux.lds.S
index 3451bde..ac0e1a5 100644
--- a/arch/microblaze/kernel/vmlinux.lds.S
+++ b/arch/microblaze/kernel/vmlinux.lds.S
@@ -70,11 +70,6 @@ SECTIONS {
 	RW_DATA_SECTION(32, PAGE_SIZE, THREAD_SIZE)
 	_edata = . ;
 
-	/* Reserve some low RAM for r0 based memory references */
-	. = ALIGN(0x4) ;
-	r0_ram = . ;
-	. = . +  PAGE_SIZE;	/* a page should be enough */
-
 	/* Under the microblaze ABI, .sdata and .sbss must be contiguous */
 	. = ALIGN(8);
 	.sdata : AT(ADDR(.sdata) - LOAD_OFFSET) {
-- 
cgit v0.10.2


From cd3415779bdb13e3daaf13965c89d286a0cf0480 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Tue, 1 Feb 2011 09:00:57 +0100
Subject: microblaze: Do not use "la" pseudo instruction - use addik instead

"la" pseudo instruction is only translation to "addik".
Use directly "addik" which is described in the MB reference guide.

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/kernel/entry-nommu.S b/arch/microblaze/kernel/entry-nommu.S
index ca84368..34b526f 100644
--- a/arch/microblaze/kernel/entry-nommu.S
+++ b/arch/microblaze/kernel/entry-nommu.S
@@ -115,7 +115,7 @@ ENTRY(_interrupt)
 	/* restore r31 */
 	lwi	r31, r0, PER_CPU(CURRENT_SAVE)
 	/* prepare the link register, the argument and jump */
-	la	r15, r0, ret_from_intr - 8
+	addik	r15, r0, ret_from_intr - 8
 	addk	r6, r0, r15
 	braid	do_IRQ
 	add	r5, r0, r1
@@ -283,7 +283,7 @@ ENTRY(_user_exception)
 	add	r12, r12, r12			/* convert num -> ptr */
 	add	r12, r12, r12
 	lwi	r12, r12, sys_call_table	/* Get function pointer */
-	la	r15, r0, ret_to_user-8		/* set return address */
+	addik	r15, r0, ret_to_user-8		/* set return address */
 	bra	r12				/* Make the system call. */
 	bri	0				/* won't reach here */
 1:
diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S
index ff949e3..e3c8d69 100644
--- a/arch/microblaze/kernel/entry.S
+++ b/arch/microblaze/kernel/entry.S
@@ -821,7 +821,7 @@ C_ENTRY(_debug_exception):
 	tovirt(r1,r1)
 #ifdef CONFIG_KGDB
 	addi	r5, r1, 0 /* pass pt_reg address as the first arg */
-	la	r15, r0, dbtrap_call; /* return address */
+	addik	r15, r0, dbtrap_call; /* return address */
 	rtbd	r0, microblaze_kgdb_break
 	nop;
 #endif
diff --git a/arch/microblaze/kernel/head.S b/arch/microblaze/kernel/head.S
index d8dc085..77320b8 100644
--- a/arch/microblaze/kernel/head.S
+++ b/arch/microblaze/kernel/head.S
@@ -224,26 +224,26 @@ start_here:
 #endif /* CONFIG_MMU */
 
 	/* Initialize small data anchors */
-	la	r13, r0, _KERNEL_SDA_BASE_
-	la	r2, r0, _KERNEL_SDA2_BASE_
+	addik	r13, r0, _KERNEL_SDA_BASE_
+	addik	r2, r0, _KERNEL_SDA2_BASE_
 
 	/* Initialize stack pointer */
-	la	r1, r0, init_thread_union + THREAD_SIZE - 4
+	addik	r1, r0, init_thread_union + THREAD_SIZE - 4
 
 	/* Initialize r31 with current task address */
-	la	r31, r0, init_task
+	addik	r31, r0, init_task
 
 	/*
 	 * Call platform dependent initialize function.
 	 * Please see $(ARCH)/mach-$(SUBARCH)/setup.c for
 	 * the function.
 	 */
-	la	r9, r0, machine_early_init
+	addik	r9, r0, machine_early_init
 	brald	r15, r9
 	nop
 
 #ifndef CONFIG_MMU
-	la	r15, r0, machine_halt
+	addik	r15, r0, machine_halt
 	braid	start_kernel
 	nop
 #else
diff --git a/arch/microblaze/kernel/hw_exception_handler.S b/arch/microblaze/kernel/hw_exception_handler.S
index 2401fa4..56572e9 100644
--- a/arch/microblaze/kernel/hw_exception_handler.S
+++ b/arch/microblaze/kernel/hw_exception_handler.S
@@ -490,7 +490,7 @@ ex_lw_tail:
 	/* Get the destination register number into r5 */
 	lbui	r5, r0, TOPHYS(ex_reg_op);
 	/* Form load_word jump table offset (lw_table + (8 * regnum)) */
-	la	r6, r0, TOPHYS(lw_table);
+	addik	r6, r0, TOPHYS(lw_table);
 	addk	r5, r5, r5;
 	addk	r5, r5, r5;
 	addk	r5, r5, r5;
@@ -501,7 +501,7 @@ ex_sw:
 	/* Get the destination register number into r5 */
 	lbui	r5, r0, TOPHYS(ex_reg_op);
 	/* Form store_word jump table offset (sw_table + (8 * regnum)) */
-	la	r6, r0, TOPHYS(sw_table);
+	addik	r6, r0, TOPHYS(sw_table);
 	add	r5, r5, r5;
 	add	r5, r5, r5;
 	add	r5, r5, r5;
@@ -912,7 +912,7 @@ ex_lw_vm:
 	beqid	r6, ex_lhw_vm;
 load1:	lbui	r5, r4, 0;	/* Exception address in r4 - delay slot */
 /* Load a word, byte-by-byte from destination address and save it in tmp space*/
-	la	r6, r0, ex_tmp_data_loc_0;
+	addik	r6, r0, ex_tmp_data_loc_0;
 	sbi	r5, r6, 0;
 load2:	lbui	r5, r4, 1;
 	sbi	r5, r6, 1;
@@ -926,7 +926,7 @@ load4:	lbui	r5, r4, 3;
 ex_lhw_vm:
 	/* Load a half-word, byte-by-byte from destination address and
 	 * save it in tmp space */
-	la	r6, r0, ex_tmp_data_loc_0;
+	addik	r6, r0, ex_tmp_data_loc_0;
 	sbi	r5, r6, 0;
 load5:	lbui	r5, r4, 1;
 	sbi	r5, r6, 1;
@@ -942,7 +942,7 @@ ex_sw_vm:
 	addik	r5, r8, sw_table_vm;
 	bra	r5;
 ex_sw_tail_vm:
-	la	r5, r0, ex_tmp_data_loc_0;
+	addik	r5, r0, ex_tmp_data_loc_0;
 	beqid	r6, ex_shw_vm;
 	swi	r3, r5, 0;	/* Get the word - delay slot */
 	/* Store the word, byte-by-byte into destination address */
@@ -985,7 +985,7 @@ ex_unaligned_fixup:
 	addik	r7, r0, SIGSEGV
 	/* call bad_page_fault for finding aligned fixup, fixup address is saved
 	 * in PT_PC which is used as return address from exception */
-	la	r15, r0, ret_from_exc-8 /* setup return address */
+	addik	r15, r0, ret_from_exc-8 /* setup return address */
 	brid	bad_page_fault
 	nop
 
-- 
cgit v0.10.2


From a706729c3df22d5cf4a50a02c25f5ebfcb370c82 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Fri, 28 May 2010 14:45:38 +0200
Subject: microblaze: Fix GDB issue caused by cache issue

Used the same solution as SH. Changed len to PAGE_SIZE
in copy_to_user_page macro.

Implement flush_cache_page macro.

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/include/asm/cacheflush.h b/arch/microblaze/include/asm/cacheflush.h
index 7ebd955..5a5d835 100644
--- a/arch/microblaze/include/asm/cacheflush.h
+++ b/arch/microblaze/include/asm/cacheflush.h
@@ -89,7 +89,9 @@ do { \
 #define flush_cache_vmap(start, end)			do { } while (0)
 #define flush_cache_vunmap(start, end)			do { } while (0)
 #define flush_cache_mm(mm)			do { } while (0)
-#define flush_cache_page(vma, vmaddr, pfn)	do { } while (0)
+
+#define flush_cache_page(vma, vmaddr, pfn) \
+	flush_dcache_range(pfn << PAGE_SHIFT, (pfn << PAGE_SHIFT) + PAGE_SIZE);
 
 /* MS: kgdb code use this macro, wrong len with FLASH */
 #if 0
@@ -104,9 +106,13 @@ do { \
 #define copy_to_user_page(vma, page, vaddr, dst, src, len)		\
 do {									\
 	u32 addr = virt_to_phys(dst);					\
-	invalidate_icache_range((unsigned) (addr), (unsigned) (addr) + (len));\
 	memcpy((dst), (src), (len));					\
-	flush_dcache_range((unsigned) (addr), (unsigned) (addr) + (len));\
+	if (vma->vm_flags & VM_EXEC) {					\
+		invalidate_icache_range((unsigned) (addr),		\
+					(unsigned) (addr) + PAGE_SIZE);	\
+		flush_dcache_range((unsigned) (addr),			\
+					(unsigned) (addr) + PAGE_SIZE);	\
+	}								\
 } while (0)
 
 #define copy_from_user_page(vma, page, vaddr, dst, src, len)		\
-- 
cgit v0.10.2


From b9dc9e7781f1c3e85e0d1b8044021fa8974422b1 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Mon, 31 May 2010 21:16:30 +0200
Subject: microblaze: Label MB 7.20.d as broken with WB cache

MB version 7.20.d contains fault which is related with WB that's why
error message will be shown.

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/kernel/cpu/cache.c b/arch/microblaze/kernel/cpu/cache.c
index 109876e..8cf0828 100644
--- a/arch/microblaze/kernel/cpu/cache.c
+++ b/arch/microblaze/kernel/cpu/cache.c
@@ -624,7 +624,7 @@ void microblaze_cache_init(void)
 		if (cpuinfo.dcache_wb) {
 			INFO("wb_msr");
 			mbc = (struct scache *)&wb_msr;
-			if (cpuinfo.ver_code < CPUVER_7_20_D) {
+			if (cpuinfo.ver_code <= CPUVER_7_20_D) {
 				/* MS: problem with signal handling - hw bug */
 				INFO("WB won't work properly");
 			}
@@ -641,7 +641,7 @@ void microblaze_cache_init(void)
 		if (cpuinfo.dcache_wb) {
 			INFO("wb_nomsr");
 			mbc = (struct scache *)&wb_nomsr;
-			if (cpuinfo.ver_code < CPUVER_7_20_D) {
+			if (cpuinfo.ver_code <= CPUVER_7_20_D) {
 				/* MS: problem with signal handling - hw bug */
 				INFO("WB won't work properly");
 			}
-- 
cgit v0.10.2


From a9dbe5eb1fcb4b70313cf9cb1b6c1d994ba703d6 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Wed, 9 Feb 2011 14:23:34 +0100
Subject: microblaze: Add PVR for Microblaze v8.10.a

Microblaze v8.10.a has 0x14 version string.

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/kernel/cpu/cpuinfo.c b/arch/microblaze/kernel/cpu/cpuinfo.c
index 2c309fc..c1640c5 100644
--- a/arch/microblaze/kernel/cpu/cpuinfo.c
+++ b/arch/microblaze/kernel/cpu/cpuinfo.c
@@ -33,6 +33,7 @@ const struct cpu_ver_key cpu_ver_lookup[] = {
 	{"7.30.b", 0x11},
 	{"8.00.a", 0x12},
 	{"8.00.b", 0x13},
+	{"8.10.a", 0x14},
 	{NULL, 0},
 };
 
-- 
cgit v0.10.2


From 702d54277af852b99c05c42cc988bb2f9dede93b Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Tue, 8 Feb 2011 14:55:09 +0100
Subject: microblaze: Fix coding style - ptrace.h

Use tab instead of spaces.

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/include/asm/ptrace.h b/arch/microblaze/include/asm/ptrace.h
index d74dbfb..d9b6630 100644
--- a/arch/microblaze/include/asm/ptrace.h
+++ b/arch/microblaze/include/asm/ptrace.h
@@ -66,13 +66,13 @@ void show_regs(struct pt_regs *);
 #else /* __KERNEL__ */
 
 /* pt_regs offsets used by gdbserver etc in ptrace syscalls */
-#define PT_GPR(n)       ((n) * sizeof(microblaze_reg_t))
-#define PT_PC           (32 * sizeof(microblaze_reg_t))
-#define PT_MSR          (33 * sizeof(microblaze_reg_t))
-#define PT_EAR          (34 * sizeof(microblaze_reg_t))
-#define PT_ESR          (35 * sizeof(microblaze_reg_t))
-#define PT_FSR          (36 * sizeof(microblaze_reg_t))
-#define PT_KERNEL_MODE  (37 * sizeof(microblaze_reg_t))
+#define PT_GPR(n)	((n) * sizeof(microblaze_reg_t))
+#define PT_PC		(32 * sizeof(microblaze_reg_t))
+#define PT_MSR		(33 * sizeof(microblaze_reg_t))
+#define PT_EAR		(34 * sizeof(microblaze_reg_t))
+#define PT_ESR		(35 * sizeof(microblaze_reg_t))
+#define PT_FSR		(36 * sizeof(microblaze_reg_t))
+#define PT_KERNEL_MODE	(37 * sizeof(microblaze_reg_t))
 
 #endif /* __KERNEL */
 
-- 
cgit v0.10.2


From 0a2e1d23f2976287904e611b195f628a52b299b1 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Tue, 21 Jul 2009 12:58:21 +0200
Subject: microblaze: trivial: Add one empty line

Add one empty line to microblaze_ksyms.c.
Remove one empty line to cacheflush.h.

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/include/asm/cacheflush.h b/arch/microblaze/include/asm/cacheflush.h
index 5a5d835..0f553bc 100644
--- a/arch/microblaze/include/asm/cacheflush.h
+++ b/arch/microblaze/include/asm/cacheflush.h
@@ -84,7 +84,6 @@ do { \
 #define flush_dcache_mmap_lock(mapping)		do { } while (0)
 #define flush_dcache_mmap_unlock(mapping)	do { } while (0)
 
-
 #define flush_cache_dup_mm(mm)				do { } while (0)
 #define flush_cache_vmap(start, end)			do { } while (0)
 #define flush_cache_vunmap(start, end)			do { } while (0)
diff --git a/arch/microblaze/kernel/microblaze_ksyms.c b/arch/microblaze/kernel/microblaze_ksyms.c
index 5cb0341..b52fc2f 100644
--- a/arch/microblaze/kernel/microblaze_ksyms.c
+++ b/arch/microblaze/kernel/microblaze_ksyms.c
@@ -24,6 +24,7 @@
 
 extern char *_ebss;
 EXPORT_SYMBOL_GPL(_ebss);
+
 #ifdef CONFIG_FUNCTION_TRACER
 extern void _mcount(void);
 EXPORT_SYMBOL(_mcount);
-- 
cgit v0.10.2


From 5323c48b0cfd98d93eb29907450ca48d009545ad Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Thu, 10 Feb 2011 08:37:49 +0100
Subject: microblaze: Add support for DMA_BIDIRECTIONAL

CDMA requires DMA_BIDIRECTIONAL option.

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/kernel/dma.c b/arch/microblaze/kernel/dma.c
index 79c7465..393e6b2 100644
--- a/arch/microblaze/kernel/dma.c
+++ b/arch/microblaze/kernel/dma.c
@@ -26,6 +26,7 @@ static inline void __dma_sync_page(unsigned long paddr, unsigned long offset,
 {
 	switch (direction) {
 	case DMA_TO_DEVICE:
+	case DMA_BIDIRECTIONAL:
 		flush_dcache_range(paddr + offset, paddr + offset + size);
 		break;
 	case DMA_FROM_DEVICE:
-- 
cgit v0.10.2


From fe34c478d14480c9e389f71e6bcf62827f86c089 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Mon, 7 Feb 2011 11:32:09 +0100
Subject: microblaze: Fix sparse warning - prom.c

Warning log:
CHECK   arch/microblaze/kernel/dma.c
arch/microblaze/kernel/dma.c:53:26: warning: incorrect type in argument 1 (different base types)
arch/microblaze/kernel/dma.c:53:26:    expected int [signed] gfp
arch/microblaze/kernel/dma.c:53:26:    got restricted unsigned int [usertype] flag

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c
index bceaa55..00ee90f 100644
--- a/arch/microblaze/kernel/prom.c
+++ b/arch/microblaze/kernel/prom.c
@@ -59,7 +59,7 @@ static int __init early_init_dt_scan_serial(unsigned long node,
 {
 	unsigned long l;
 	char *p;
-	int *addr;
+	const __be32 *addr;
 
 	pr_debug("search \"serial\", depth: %d, uname: %s\n", depth, uname);
 
-- 
cgit v0.10.2


From 29e3dbb10f0efff1297026679364dacc2c822145 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Mon, 7 Feb 2011 11:33:47 +0100
Subject: microblaze: Fix sparse warning - timer.c

Variables and init_microblaze_timecounter should be static.

Warning log:
CHECK   arch/microblaze/kernel/timer.c
arch/microblaze/kernel/timer.c:41:14: warning: symbol 'freq_div_hz' was not declared. Should it be static?
arch/microblaze/kernel/timer.c:42:14: warning: symbol 'timer_clock_freq' was not declared. Should it be static?
arch/microblaze/kernel/timer.c:205:12: warning: symbol 'init_microblaze_timecounter' was not declared. Should it be static?

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c
index a5aa33d..d8a214f 100644
--- a/arch/microblaze/kernel/timer.c
+++ b/arch/microblaze/kernel/timer.c
@@ -38,8 +38,8 @@ static unsigned int timer_baseaddr;
 #define TIMER_BASE	timer_baseaddr
 #endif
 
-unsigned int freq_div_hz;
-unsigned int timer_clock_freq;
+static unsigned int freq_div_hz;
+static unsigned int timer_clock_freq;
 
 #define TCSR0	(0x00)
 #define TLR0	(0x04)
@@ -202,7 +202,7 @@ static struct cyclecounter microblaze_cc = {
 	.shift = 8,
 };
 
-int __init init_microblaze_timecounter(void)
+static int __init init_microblaze_timecounter(void)
 {
 	microblaze_cc.mult = div_sc(timer_clock_freq, NSEC_PER_SEC,
 				microblaze_cc.shift);
-- 
cgit v0.10.2


From f699980b0d3c0f4f31e07ef45a48bbe860510a89 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Mon, 7 Feb 2011 11:36:25 +0100
Subject: microblaze: Fix sparse warning - sw_exceptions

Function sw_exception is linked with asm code.

Warning log:
CHECK   arch/microblaze/kernel/exceptions.c
arch/microblaze/kernel/exceptions.c:53:6: warning: symbol 'sw_exception' was not declared. Should it be static?

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/include/asm/exceptions.h b/arch/microblaze/include/asm/exceptions.h
index 6479097..23c0f71 100644
--- a/arch/microblaze/include/asm/exceptions.h
+++ b/arch/microblaze/include/asm/exceptions.h
@@ -66,6 +66,8 @@
 asmlinkage void full_exception(struct pt_regs *regs, unsigned int type,
 							int fsr, int addr);
 
+asmlinkage void sw_exception(struct pt_regs *regs);
+
 void die(const char *str, struct pt_regs *fp, long err);
 void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr);
 
diff --git a/arch/microblaze/kernel/exceptions.c b/arch/microblaze/kernel/exceptions.c
index a7fa6ae7..66fad23 100644
--- a/arch/microblaze/kernel/exceptions.c
+++ b/arch/microblaze/kernel/exceptions.c
@@ -50,7 +50,7 @@ void die(const char *str, struct pt_regs *fp, long err)
 }
 
 /* for user application debugging */
-void sw_exception(struct pt_regs *regs)
+asmlinkage void sw_exception(struct pt_regs *regs)
 {
 	_exception(SIGTRAP, regs, TRAP_BRKPT, regs->r16);
 	flush_dcache_range(regs->r16, regs->r16 + 0x4);
-- 
cgit v0.10.2


From c1df53b33c818d28d5e3b287530373e78a7904e7 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Mon, 7 Feb 2011 11:38:57 +0100
Subject: microblaze: Fix sparse warnings - ptrace

Warning log:
CHECK   arch/microblaze/kernel/ptrace.c
arch/microblaze/kernel/ptrace.c:126:11: warning: incorrect type in initializer (different address spaces)
arch/microblaze/kernel/ptrace.c:126:11:    expected unknown type 2[noderef] *__pu_addr<asn:1>
arch/microblaze/kernel/ptrace.c:126:11:    got unsigned long *<noident>
arch/microblaze/kernel/ptrace.c:134:17: warning: symbol 'do_syscall_trace_enter' was not declared. Should it be static?
arch/microblaze/kernel/ptrace.c:157:17: warning: symbol 'do_syscall_trace_leave' was not declared. Should it be static?

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/include/asm/syscall.h b/arch/microblaze/include/asm/syscall.h
index 048dfcd..9bc4317 100644
--- a/arch/microblaze/include/asm/syscall.h
+++ b/arch/microblaze/include/asm/syscall.h
@@ -96,4 +96,7 @@ static inline void syscall_set_arguments(struct task_struct *task,
 		microblaze_set_syscall_arg(regs, i++, *args++);
 }
 
+asmlinkage long do_syscall_trace_enter(struct pt_regs *regs);
+asmlinkage void do_syscall_trace_leave(struct pt_regs *regs);
+
 #endif /* __ASM_MICROBLAZE_SYSCALL_H */
diff --git a/arch/microblaze/kernel/ptrace.c b/arch/microblaze/kernel/ptrace.c
index 05ac8cc..6a8e0cc 100644
--- a/arch/microblaze/kernel/ptrace.c
+++ b/arch/microblaze/kernel/ptrace.c
@@ -39,6 +39,7 @@
 #include <linux/uaccess.h>
 #include <asm/asm-offsets.h>
 #include <asm/cacheflush.h>
+#include <asm/syscall.h>
 #include <asm/io.h>
 
 /* Returns the address where the register at REG_OFFS in P is stashed away. */
@@ -123,7 +124,7 @@ long arch_ptrace(struct task_struct *child, long request,
 			rval = -EIO;
 
 		if (rval == 0 && request == PTRACE_PEEKUSR)
-			rval = put_user(val, (unsigned long *)data);
+			rval = put_user(val, (unsigned long __user *)data);
 		break;
 	default:
 		rval = ptrace_request(child, request, addr, data);
-- 
cgit v0.10.2


From cd44da154241170be3f1fadb1f2ca689f6802628 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Mon, 7 Feb 2011 11:42:37 +0100
Subject: microblaze: Fix sparse warning - consistent_alloc function

Warning in dma.c was caused by incorrect type in consistent_alloc function.

Warning log:
CHECK   arch/microblaze/kernel/dma.c
arch/microblaze/kernel/dma.c:53:26: warning: incorrect type in argument 1 (different base types)
arch/microblaze/kernel/dma.c:53:26:    expected int [signed] gfp
arch/microblaze/kernel/dma.c:53:26:    got restricted unsigned int [usertype] flag

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/include/asm/pgtable.h b/arch/microblaze/include/asm/pgtable.h
index 885574a..b2af423 100644
--- a/arch/microblaze/include/asm/pgtable.h
+++ b/arch/microblaze/include/asm/pgtable.h
@@ -572,7 +572,7 @@ void __init *early_get_page(void);
 
 extern unsigned long ioremap_bot, ioremap_base;
 
-void *consistent_alloc(int gfp, size_t size, dma_addr_t *dma_handle);
+void *consistent_alloc(gfp_t gfp, size_t size, dma_addr_t *dma_handle);
 void consistent_free(size_t size, void *vaddr);
 void consistent_sync(void *vaddr, size_t size, int direction);
 void consistent_sync_page(struct page *page, unsigned long offset,
diff --git a/arch/microblaze/mm/consistent.c b/arch/microblaze/mm/consistent.c
index 5a59dad..a1e2e18 100644
--- a/arch/microblaze/mm/consistent.c
+++ b/arch/microblaze/mm/consistent.c
@@ -59,7 +59,7 @@
  * uncached region.  This will no doubt cause big problems if memory allocated
  * here is not also freed properly. -- JW
  */
-void *consistent_alloc(int gfp, size_t size, dma_addr_t *dma_handle)
+void *consistent_alloc(gfp_t gfp, size_t size, dma_addr_t *dma_handle)
 {
 	unsigned long order, vaddr;
 	void *ret;
-- 
cgit v0.10.2


From 419ef3406a16dfb765538f7bd67728fef9877472 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Mon, 7 Feb 2011 11:51:07 +0100
Subject: microblaze: Fix sparse warning - unwind.c

Warning log:
CHECK   arch/microblaze/kernel/unwind.c
arch/microblaze/kernel/unwind.c:186:6: warning: symbol 'microblaze_unwind_inner' was not declared. Should it be static?

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/kernel/unwind.c b/arch/microblaze/kernel/unwind.c
index fefac5c..9781a52 100644
--- a/arch/microblaze/kernel/unwind.c
+++ b/arch/microblaze/kernel/unwind.c
@@ -183,7 +183,7 @@ static inline void unwind_trap(struct task_struct *task, unsigned long pc,
  * @trace : Where to store stack backtrace (PC values).
  *	    NULL == print backtrace to kernel log
  */
-void microblaze_unwind_inner(struct task_struct *task,
+static void microblaze_unwind_inner(struct task_struct *task,
 			     unsigned long pc, unsigned long fp,
 			     unsigned long leaf_return,
 			     struct stack_trace *trace)
-- 
cgit v0.10.2


From 8afe3839a993beda2ebc119c0a545dcc5baecc08 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Mon, 7 Feb 2011 11:56:14 +0100
Subject: microblaze: Fix sparse warning - cpuinfo.h

Warning log:
CHECK   arch/microblaze/kernel/cpu/cpuinfo-static.c
arch/microblaze/include/asm/cpuinfo.h:101:21: warning: incorrect type in argument 1 (different signedness)
arch/microblaze/include/asm/cpuinfo.h:101:21:    expected unsigned int const [usertype] *p
arch/microblaze/include/asm/cpuinfo.h:101:21:    got int *[assigned] val
...

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/include/asm/cpuinfo.h b/arch/microblaze/include/asm/cpuinfo.h
index cd25753..d8f0133 100644
--- a/arch/microblaze/include/asm/cpuinfo.h
+++ b/arch/microblaze/include/asm/cpuinfo.h
@@ -96,8 +96,8 @@ void set_cpuinfo_pvr_full(struct cpuinfo *ci, struct device_node *cpu);
 
 static inline unsigned int fcpu(struct device_node *cpu, char *n)
 {
-	int *val;
-	return (val = (int *) of_get_property(cpu, n, NULL)) ?
+	const __be32 *val;
+	return (val = of_get_property(cpu, n, NULL)) ?
 							be32_to_cpup(val) : 0;
 }
 
-- 
cgit v0.10.2


From 954e8b9599d64a959fe81cfaa8b0e0ee6387271c Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Mon, 7 Feb 2011 12:21:42 +0100
Subject: microblaze: Fix sparse warnings - cache.c

Warning log:
CHECK   arch/microblaze/kernel/cpu/cache.c
arch/microblaze/kernel/cpu/cache.c:522:21: warning: symbol 'wb_msr' was not declared. Should it be static?
arch/microblaze/kernel/cpu/cache.c:538:21: warning: symbol 'wb_nomsr' was not declared. Should it be static?
arch/microblaze/kernel/cpu/cache.c:554:21: warning: symbol 'wt_msr' was not declared. Should it be static?
arch/microblaze/kernel/cpu/cache.c:569:21: warning: symbol 'wt_nomsr' was not declared. Should it be static?
arch/microblaze/kernel/cpu/cache.c:585:21: warning: symbol 'wt_msr_noirq' was not declared. Should it be static?
arch/microblaze/kernel/cpu/cache.c:600:21: warning: symbol 'wt_nomsr_noirq' was not declared. Should it be static?

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/kernel/cpu/cache.c b/arch/microblaze/kernel/cpu/cache.c
index 8cf0828..cf0afd9 100644
--- a/arch/microblaze/kernel/cpu/cache.c
+++ b/arch/microblaze/kernel/cpu/cache.c
@@ -519,7 +519,7 @@ static void __flush_dcache_range_wb(unsigned long start, unsigned long end)
 struct scache *mbc;
 
 /* new wb cache model */
-const struct scache wb_msr = {
+static const struct scache wb_msr = {
 	.ie = __enable_icache_msr,
 	.id = __disable_icache_msr,
 	.ifl = __flush_icache_all_noirq,
@@ -535,7 +535,7 @@ const struct scache wb_msr = {
 };
 
 /* There is only difference in ie, id, de, dd functions */
-const struct scache wb_nomsr = {
+static const struct scache wb_nomsr = {
 	.ie = __enable_icache_nomsr,
 	.id = __disable_icache_nomsr,
 	.ifl = __flush_icache_all_noirq,
@@ -551,7 +551,7 @@ const struct scache wb_nomsr = {
 };
 
 /* Old wt cache model with disabling irq and turn off cache */
-const struct scache wt_msr = {
+static const struct scache wt_msr = {
 	.ie = __enable_icache_msr,
 	.id = __disable_icache_msr,
 	.ifl = __flush_icache_all_msr_irq,
@@ -566,7 +566,7 @@ const struct scache wt_msr = {
 	.dinr = __invalidate_dcache_range_msr_irq_wt,
 };
 
-const struct scache wt_nomsr = {
+static const struct scache wt_nomsr = {
 	.ie = __enable_icache_nomsr,
 	.id = __disable_icache_nomsr,
 	.ifl = __flush_icache_all_nomsr_irq,
@@ -582,7 +582,7 @@ const struct scache wt_nomsr = {
 };
 
 /* New wt cache model for newer Microblaze versions */
-const struct scache wt_msr_noirq = {
+static const struct scache wt_msr_noirq = {
 	.ie = __enable_icache_msr,
 	.id = __disable_icache_msr,
 	.ifl = __flush_icache_all_noirq,
@@ -597,7 +597,7 @@ const struct scache wt_msr_noirq = {
 	.dinr = __invalidate_dcache_range_nomsr_wt,
 };
 
-const struct scache wt_nomsr_noirq = {
+static const struct scache wt_nomsr_noirq = {
 	.ie = __enable_icache_nomsr,
 	.id = __disable_icache_nomsr,
 	.ifl = __flush_icache_all_noirq,
-- 
cgit v0.10.2


From 4302e5254a8a9e726db444763be1e95e063406fb Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Mon, 7 Feb 2011 12:22:55 +0100
Subject: microblaze: Fix missing microblaze specific syscalls declaration

Warning log:
CHECK   arch/microblaze/kernel/sys_microblaze.c
arch/microblaze/kernel/sys_microblaze.c:37:17: warning: symbol 'microblaze_vfork' was not declared. Should it be static?
arch/microblaze/kernel/sys_microblaze.c:43:17: warning: symbol 'microblaze_clone' was not declared. Should it be static?
arch/microblaze/kernel/sys_microblaze.c:50:17: warning: symbol 'microblaze_execve' was not declared. Should it be static?

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/include/asm/syscalls.h b/arch/microblaze/include/asm/syscalls.h
index 720761c..27f2f4c 100644
--- a/arch/microblaze/include/asm/syscalls.h
+++ b/arch/microblaze/include/asm/syscalls.h
@@ -1,5 +1,13 @@
 #ifndef __ASM_MICROBLAZE_SYSCALLS_H
 
+asmlinkage long microblaze_vfork(struct pt_regs *regs);
+asmlinkage long microblaze_clone(int flags, unsigned long stack,
+							struct pt_regs *regs);
+asmlinkage long microblaze_execve(const char __user *filenamei,
+				  const char __user *const __user *argv,
+				  const char __user *const __user *envp,
+				  struct pt_regs *regs);
+
 asmlinkage long sys_clone(int flags, unsigned long stack, struct pt_regs *regs);
 #define sys_clone sys_clone
 
diff --git a/arch/microblaze/kernel/sys_microblaze.c b/arch/microblaze/kernel/sys_microblaze.c
index 2250fe9..e5b154f 100644
--- a/arch/microblaze/kernel/sys_microblaze.c
+++ b/arch/microblaze/kernel/sys_microblaze.c
@@ -40,7 +40,8 @@ asmlinkage long microblaze_vfork(struct pt_regs *regs)
 						regs, 0, NULL, NULL);
 }
 
-asmlinkage long microblaze_clone(int flags, unsigned long stack, struct pt_regs *regs)
+asmlinkage long microblaze_clone(int flags, unsigned long stack,
+							struct pt_regs *regs)
 {
 	if (!stack)
 		stack = regs->r1;
-- 
cgit v0.10.2


From 5213a9c3b663dd946d7c8bdfc9180983bd03a2a1 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Mon, 7 Feb 2011 12:24:39 +0100
Subject: microblaze: Fix sparse warning - fault.c

Warning log:
CHECK   arch/microblaze/mm/fault.c
arch/microblaze/mm/fault.c:51:6: warning: incorrect type in initializer (different address spaces)
arch/microblaze/mm/fault.c:51:6:    expected unknown type 2const [noderef] *__gu_addr<asn:1>
arch/microblaze/mm/fault.c:51:6:    got unsigned int *<noident>
arch/microblaze/mm/fault.c:68:6: warning: symbol 'bad_page_fault' was not declared. Should it be static?

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/include/asm/exceptions.h b/arch/microblaze/include/asm/exceptions.h
index 23c0f71..e6a8dde 100644
--- a/arch/microblaze/include/asm/exceptions.h
+++ b/arch/microblaze/include/asm/exceptions.h
@@ -67,6 +67,7 @@ asmlinkage void full_exception(struct pt_regs *regs, unsigned int type,
 							int fsr, int addr);
 
 asmlinkage void sw_exception(struct pt_regs *regs);
+void bad_page_fault(struct pt_regs *regs, unsigned long address, int sig);
 
 void die(const char *str, struct pt_regs *fp, long err);
 void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr);
diff --git a/arch/microblaze/mm/fault.c b/arch/microblaze/mm/fault.c
index 57bd2a0..ae97d2c 100644
--- a/arch/microblaze/mm/fault.c
+++ b/arch/microblaze/mm/fault.c
@@ -48,7 +48,7 @@ static int store_updates_sp(struct pt_regs *regs)
 {
 	unsigned int inst;
 
-	if (get_user(inst, (unsigned int *)regs->pc))
+	if (get_user(inst, (unsigned int __user *)regs->pc))
 		return 0;
 	/* check for 1 in the rD field */
 	if (((inst >> 21) & 0x1f) != 1)
-- 
cgit v0.10.2


From 2cfedb97d6b3001d58c785839a8bc402374fe9f8 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Mon, 7 Feb 2011 12:25:37 +0100
Subject: microblaze: Fix sparse warnings - signal.c

Warning log:
CHECK   arch/microblaze/kernel/signal.c
arch/microblaze/kernel/signal.c:200:9: warning: Using plain integer as NULL pointer
arch/microblaze/kernel/signal.c:201:9: warning: incorrect type in initializer (different address spaces)
arch/microblaze/kernel/signal.c:201:9:    expected void [noderef] *volatile __gu_val<asn:1>
arch/microblaze/kernel/signal.c:201:9:    got void *<noident>

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c
index 580d052..5996711 100644
--- a/arch/microblaze/kernel/signal.c
+++ b/arch/microblaze/kernel/signal.c
@@ -197,8 +197,8 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 
 	/* Create the ucontext. */
 	err |= __put_user(0, &frame->uc.uc_flags);
-	err |= __put_user(0, &frame->uc.uc_link);
-	err |= __put_user((void *)current->sas_ss_sp,
+	err |= __put_user(NULL, &frame->uc.uc_link);
+	err |= __put_user((void __user *)current->sas_ss_sp,
 			&frame->uc.uc_stack.ss_sp);
 	err |= __put_user(sas_ss_flags(regs->r1),
 			&frame->uc.uc_stack.ss_flags);
-- 
cgit v0.10.2


From 6c3564d3f6a12b835ca95630927503a6ace94762 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 6 Feb 2011 19:36:28 +0000
Subject: microblaze: Remove stale irq_chip.end

irq_chip.end got obsolete with the removal of __do_IRQ().

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Tested-by: Michal Simek <monstr@monstr.eu>
LKML-Reference: <20110203004210.240154507@linutronix.de>

diff --git a/arch/microblaze/kernel/intc.c b/arch/microblaze/kernel/intc.c
index d61ea33..bff99d1 100644
--- a/arch/microblaze/kernel/intc.c
+++ b/arch/microblaze/kernel/intc.c
@@ -74,25 +74,12 @@ static void intc_mask_ack(unsigned int irq)
 	out_be32(INTC_BASE + IAR, mask);
 }
 
-static void intc_end(unsigned int irq)
-{
-	unsigned long mask = 1 << irq;
-	pr_debug("end: %d\n", irq);
-	if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) {
-		out_be32(INTC_BASE + SIE, mask);
-		/* ack level sensitive intr */
-		if (irq_desc[irq].status & IRQ_LEVEL)
-			out_be32(INTC_BASE + IAR, mask);
-	}
-}
-
 static struct irq_chip intc_dev = {
 	.name = "Xilinx INTC",
 	.unmask = intc_enable_or_unmask,
 	.mask = intc_disable_or_mask,
 	.ack = intc_ack,
 	.mask_ack = intc_mask_ack,
-	.end = intc_end,
 };
 
 unsigned int get_irq(struct pt_regs *regs)
-- 
cgit v0.10.2


From 208a34f55f1ba4964e5a06b6876a84dc454f1d92 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 6 Feb 2011 19:36:33 +0000
Subject: microblaze: Select GENERIC_HARDIRQS_NO_DEPRECATED

All irq_chips converted.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 3168003..6e394a4 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -17,6 +17,7 @@ config MICROBLAZE
 	select OF_EARLY_FLATTREE
 	select HAVE_GENERIC_HARDIRQS
 	select GENERIC_IRQ_PROBE
+	select GENERIC_HARDIRQS_NO_DEPRECATED
 
 config SWAP
 	def_bool n
-- 
cgit v0.10.2


From 6f205a4c69037e4d8fdf33088a852b64500df012 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 6 Feb 2011 19:36:30 +0000
Subject: microblaze: Convert irq_chip to new functions

Use proper irq_desc wrappers while at it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/kernel/intc.c b/arch/microblaze/kernel/intc.c
index bff99d1..e466128 100644
--- a/arch/microblaze/kernel/intc.c
+++ b/arch/microblaze/kernel/intc.c
@@ -40,46 +40,46 @@ unsigned int nr_irq;
 #define MER_ME (1<<0)
 #define MER_HIE (1<<1)
 
-static void intc_enable_or_unmask(unsigned int irq)
+static void intc_enable_or_unmask(struct irq_data *d)
 {
-	unsigned long mask = 1 << irq;
-	pr_debug("enable_or_unmask: %d\n", irq);
+	unsigned long mask = 1 << d->irq;
+	pr_debug("enable_or_unmask: %d\n", d->irq);
 	out_be32(INTC_BASE + SIE, mask);
 
 	/* ack level irqs because they can't be acked during
 	 * ack function since the handle_level_irq function
 	 * acks the irq before calling the interrupt handler
 	 */
-	if (irq_desc[irq].status & IRQ_LEVEL)
+	if (irq_to_desc(d->irq)->status & IRQ_LEVEL)
 		out_be32(INTC_BASE + IAR, mask);
 }
 
-static void intc_disable_or_mask(unsigned int irq)
+static void intc_disable_or_mask(struct irq_data *d)
 {
-	pr_debug("disable: %d\n", irq);
-	out_be32(INTC_BASE + CIE, 1 << irq);
+	pr_debug("disable: %d\n", d->irq);
+	out_be32(INTC_BASE + CIE, 1 << d->irq);
 }
 
-static void intc_ack(unsigned int irq)
+static void intc_ack(struct irq_data *d)
 {
-	pr_debug("ack: %d\n", irq);
-	out_be32(INTC_BASE + IAR, 1 << irq);
+	pr_debug("ack: %d\n", d->irq);
+	out_be32(INTC_BASE + IAR, 1 << d->irq);
 }
 
-static void intc_mask_ack(unsigned int irq)
+static void intc_mask_ack(struct irq_data *d)
 {
-	unsigned long mask = 1 << irq;
-	pr_debug("disable_and_ack: %d\n", irq);
+	unsigned long mask = 1 << d->irq;
+	pr_debug("disable_and_ack: %d\n", d->irq);
 	out_be32(INTC_BASE + CIE, mask);
 	out_be32(INTC_BASE + IAR, mask);
 }
 
 static struct irq_chip intc_dev = {
 	.name = "Xilinx INTC",
-	.unmask = intc_enable_or_unmask,
-	.mask = intc_disable_or_mask,
-	.ack = intc_ack,
-	.mask_ack = intc_mask_ack,
+	.irq_unmask = intc_enable_or_unmask,
+	.irq_mask = intc_disable_or_mask,
+	.irq_ack = intc_ack,
+	.irq_mask_ack = intc_mask_ack,
 };
 
 unsigned int get_irq(struct pt_regs *regs)
@@ -159,11 +159,11 @@ void __init init_IRQ(void)
 		if (intr_type & (0x00000001 << i)) {
 			set_irq_chip_and_handler_name(i, &intc_dev,
 				handle_edge_irq, intc_dev.name);
-			irq_desc[i].status &= ~IRQ_LEVEL;
+			irq_clear_status_flags(i, IRQ_LEVEL);
 		} else {
 			set_irq_chip_and_handler_name(i, &intc_dev,
 				handle_level_irq, intc_dev.name);
-			irq_desc[i].status |= IRQ_LEVEL;
+			irq_set_status_flags(i, IRQ_LEVEL);
 		}
 	}
 }
diff --git a/arch/microblaze/kernel/irq.c b/arch/microblaze/kernel/irq.c
index a9345fb..0988224 100644
--- a/arch/microblaze/kernel/irq.c
+++ b/arch/microblaze/kernel/irq.c
@@ -50,6 +50,7 @@ next_irq:
 int show_interrupts(struct seq_file *p, void *v)
 {
 	int i = *(loff_t *) v, j;
+	struct irq_desc *desc;
 	struct irqaction *action;
 	unsigned long flags;
 
@@ -61,8 +62,9 @@ int show_interrupts(struct seq_file *p, void *v)
 	}
 
 	if (i < nr_irq) {
-		raw_spin_lock_irqsave(&irq_desc[i].lock, flags);
-		action = irq_desc[i].action;
+		desc = irq_to_desc(i);
+		raw_spin_lock_irqsave(&desc->lock, flags);
+		action = desc->action;
 		if (!action)
 			goto skip;
 		seq_printf(p, "%3d: ", i);
@@ -72,9 +74,9 @@ int show_interrupts(struct seq_file *p, void *v)
 		for_each_online_cpu(j)
 			seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
 #endif
-		seq_printf(p, " %8s", irq_desc[i].status &
+		seq_printf(p, " %8s", desc->status &
 					IRQ_LEVEL ? "level" : "edge");
-		seq_printf(p, " %8s", irq_desc[i].chip->name);
+		seq_printf(p, " %8s", desc->irq_data.chip->name);
 		seq_printf(p, "  %s", action->name);
 
 		for (action = action->next; action; action = action->next)
@@ -82,7 +84,7 @@ int show_interrupts(struct seq_file *p, void *v)
 
 		seq_putc(p, '\n');
 skip:
-		raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags);
+		raw_spin_unlock_irqrestore(&desc->lock, flags);
 	}
 	return 0;
 }
-- 
cgit v0.10.2


From 6f3946b421395ff853bc0bcdab9c26b50ebbba8f Mon Sep 17 00:00:00 2001
From: "Steven J. Magnani" <steve@digidescorp.com>
Date: Thu, 10 Feb 2011 12:12:13 -0600
Subject: microblaze: Fix /dev/zero corruption from __clear_user()

A userland read of more than PAGE_SIZE bytes from /dev/zero results in
(a) not all of the bytes returned being zero, and
(b) memory corruption due to zeroing of bytes beyond the user buffer.

This is caused by improper constraints on the assembly __clear_user function.
The constrints don't indicate to the compiler that the pointer argument is
modified. Since the function is inline, this results in double-incrementing
of the pointer when __clear_user() is invoked through a multi-page read() of
/dev/zero.

Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Acked-by: Michal Simek <monstr@monstr.eu>
CC: stable@kernel.org

diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h
index d840f4a..5bb95a1 100644
--- a/arch/microblaze/include/asm/uaccess.h
+++ b/arch/microblaze/include/asm/uaccess.h
@@ -120,16 +120,16 @@ static inline unsigned long __must_check __clear_user(void __user *to,
 {
 	/* normal memset with two words to __ex_table */
 	__asm__ __volatile__ (				\
-			"1:	sb	r0, %2, r0;"	\
+			"1:	sb	r0, %1, r0;"	\
 			"	addik	%0, %0, -1;"	\
 			"	bneid	%0, 1b;"	\
-			"	addik	%2, %2, 1;"	\
+			"	addik	%1, %1, 1;"	\
 			"2:			"	\
 			__EX_TABLE_SECTION		\
 			".word	1b,2b;"			\
 			".previous;"			\
-		: "=r"(n)				\
-		: "0"(n), "r"(to)
+		: "=r"(n), "=r"(to)			\
+		: "0"(n), "1"(to)
 	);
 	return n;
 }
-- 
cgit v0.10.2


From d50c3036fa83e72f738874cf3b81a94678ceb161 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Thu, 24 Feb 2011 15:36:49 +0100
Subject: microblaze: Add missing export symbols for lib functions

Adding missing export symbols for loadable modules.

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/kernel/microblaze_ksyms.c b/arch/microblaze/kernel/microblaze_ksyms.c
index b52fc2f..49faeb4 100644
--- a/arch/microblaze/kernel/microblaze_ksyms.c
+++ b/arch/microblaze/kernel/microblaze_ksyms.c
@@ -46,3 +46,14 @@ EXPORT_SYMBOL(empty_zero_page);
 #endif
 
 EXPORT_SYMBOL(mbc);
+
+extern void __divsi3(void);
+EXPORT_SYMBOL(__divsi3);
+extern void __modsi3(void);
+EXPORT_SYMBOL(__modsi3);
+extern void __mulsi3(void);
+EXPORT_SYMBOL(__mulsi3);
+extern void __udivsi3(void);
+EXPORT_SYMBOL(__udivsi3);
+extern void __umodsi3(void);
+EXPORT_SYMBOL(__umodsi3);
diff --git a/arch/microblaze/lib/muldi3.c b/arch/microblaze/lib/muldi3.c
index d4860e1..0585bcc 100644
--- a/arch/microblaze/lib/muldi3.c
+++ b/arch/microblaze/lib/muldi3.c
@@ -58,3 +58,4 @@ DWtype __muldi3(DWtype u, DWtype v)
 
 	return w.ll;
 }
+EXPORT_SYMBOL(__muldi3);
-- 
cgit v0.10.2


From 910672dee56ab5909790cca2d1df7d782f9cea73 Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Wed, 2 Mar 2011 18:38:35 +0100
Subject: microblaze: Fix typo in Kconfig

s/Exectuable/Executable/

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 6e394a4..050aca3 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -248,7 +248,7 @@ endmenu
 
 source "mm/Kconfig"
 
-menu "Exectuable file formats"
+menu "Executable file formats"
 
 source "fs/Kconfig.binfmt"
 
-- 
cgit v0.10.2


From caa66ce9055d15fb319075ebcf30fbc666b41665 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Thu, 10 Mar 2011 10:39:51 +0100
Subject: microblaze: Fix circular headers dependency when ftrace is enabled.

Remove compilation failure when ftrace in enabled.

Error log:
  CC      kernel/trace/power-traces.o
In file included from arch/microblaze/include/asm/irq.h:15,
                 from include/linux/irq.h:27,
                 from include/asm-generic/hardirq.h:12,
                 from arch/microblaze/include/asm/hardirq.h:15,
                 from include/linux/hardirq.h:7,
                 from include/linux/ftrace_event.h:7,
                 from include/trace/ftrace.h:19,
                 from include/trace/define_trace.h:96,
                 from include/trace/events/power.h:240,
                 from kernel/trace/power-traces.c:14:
include/linux/interrupt.h: In function '__raise_softirq_irqoff':
include/linux/interrupt.h:413: error: implicit declaration of function 'trace_softirq_raise'
In file included from include/trace/ftrace.h:554,
                 from include/trace/define_trace.h:96,
                 from include/trace/events/power.h:240,
                 from kernel/trace/power-traces.c:14:
include/trace/events/irq.h: In function 'ftrace_test_probe_irq_handler_entry':
include/trace/events/irq.h:37: error: implicit declaration of function 'check_trace_callback_type_irq_handler_entry'
include/trace/events/irq.h: In function 'ftrace_test_probe_irq_handler_exit':
include/trace/events/irq.h:67: error: implicit declaration of function 'check_trace_callback_type_irq_handler_exit'
include/trace/events/irq.h: In function 'ftrace_test_probe_softirq_entry':
include/trace/events/irq.h:112: error: implicit declaration of function 'check_trace_callback_type_softirq_entry'
include/trace/events/irq.h: In function 'ftrace_test_probe_softirq_exit':
include/trace/events/irq.h:126: error: implicit declaration of function 'check_trace_callback_type_softirq_exit'
include/trace/events/irq.h: In function 'ftrace_test_probe_softirq_raise':
include/trace/events/irq.h:140: error: implicit declaration of function 'check_trace_callback_type_softirq_raise'
make[5]: *** [kernel/trace/power-traces.o] Error 1
make[4]: *** [kernel/trace] Error 2
make[3]: *** [kernel] Error 2

Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/include/asm/irq.h b/arch/microblaze/include/asm/irq.h
index ec5583d..cc54187 100644
--- a/arch/microblaze/include/asm/irq.h
+++ b/arch/microblaze/include/asm/irq.h
@@ -12,8 +12,6 @@
 #define NR_IRQS 32
 #include <asm-generic/irq.h>
 
-#include <linux/interrupt.h>
-
 /* This type is the placeholder for a hardware interrupt number. It has to
  * be big enough to enclose whatever representation is used by a given
  * platform.
-- 
cgit v0.10.2


From 626afa35c1d39be43fc2b225d21973daf1c7e299 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Thu, 10 Mar 2011 10:51:27 +0100
Subject: microblaze: Fix microblaze init vectors

Microblaze vector table stores several vectors (reset, user exception,
interrupt, debug exception and hardware exception).
All these functions can be below address 0x10000. If they are, wrong
vector table is genarated because jump is not setup from two instructions
(imm upper 16bit and brai lower 16bit).
Adding specific offset prevent problem if address is below 0x10000.
For this case only brai instruction is used.

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S
index e3c8d69..d68a397 100644
--- a/arch/microblaze/kernel/entry.S
+++ b/arch/microblaze/kernel/entry.S
@@ -998,10 +998,13 @@ ENTRY(_reset)
 	/* in current MMU branch you don't care what is here - it is
 	 * used from bootloader site - but this is correct for FS-BOOT */
 	brai	0x70
-	nop
+	.org	0x8
 	brai	TOPHYS(_user_exception); /* syscall handler */
+	.org	0x10
 	brai	TOPHYS(_interrupt);	/* Interrupt handler */
+	.org	0x18
 	brai	TOPHYS(_debug_exception);	/* debug trap handler */
+	.org	0x20
 	brai	TOPHYS(_hw_exception_handler);	/* HW exception handler */
 
 .section .rodata,"a"
-- 
cgit v0.10.2


From 7574349cee0b1cddc0aa1104d9b2fc5152d318d9 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Thu, 10 Mar 2011 10:56:21 +0100
Subject: microblaze: Fix _reset function

If soft reset falls through with no hardware assisted reset, the best
we can do is jump to the reset vector and see what the bootloader left
for us.

Signed-off-by: Michal Simek <monstr@monstr.eu>
Signed-off-by: John Williams <john.williams@petalogix.com>

diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S
index d68a397..6b40524 100644
--- a/arch/microblaze/kernel/entry.S
+++ b/arch/microblaze/kernel/entry.S
@@ -988,7 +988,7 @@ ENTRY(_switch_to)
 	nop
 
 ENTRY(_reset)
-	brai	0x70; /* Jump back to FS-boot */
+	brai	0; /* Jump to reset vector */
 
 	/* These are compiled and loaded into high memory, then
 	 * copied into place in mach_early_setup */
-- 
cgit v0.10.2


From 0b9b0200b0922c29dc251b99700f96dade92214a Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Mon, 8 Nov 2010 12:37:40 +0100
Subject: microblaze: Do not copy reset vectors/manual reset vector setup

Reset vector can be setup by bootloader and kernel doens't need
to touch it. If you require to setup reset vector, please use
CONFIG_MANUAL_RESET_VECTOR throught menuconfig.
It is not possible to setup address 0x0 as reset address because
make no sense to set it up at all.

Signed-off-by: Michal Simek <monstr@monstr.eu>
Signed-off-by: John Williams <john.williams@petalogix.com>

diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 050aca3..922c419 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -184,6 +184,17 @@ config LOWMEM_SIZE
 	hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 	default "0x30000000"
 
+config MANUAL_RESET_VECTOR
+	hex "Microblaze reset vector address setup"
+	default "0x0"
+	help
+	  Set this option to have the kernel override the CPU Reset vector.
+	  If zero, no change will be made to the MicroBlaze reset vector at
+	  address 0x0.
+	  If non-zero, a jump instruction to this address, will be written
+	  to the reset vector at address 0x0.
+	  If you are unsure, set it to default value 0x0.
+
 config KERNEL_START_BOOL
 	bool "Set custom kernel base address"
 	depends on ADVANCED_OPTIONS
diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S
index 6b40524..ca15bc5 100644
--- a/arch/microblaze/kernel/entry.S
+++ b/arch/microblaze/kernel/entry.S
@@ -993,11 +993,10 @@ ENTRY(_reset)
 	/* These are compiled and loaded into high memory, then
 	 * copied into place in mach_early_setup */
 	.section	.init.ivt, "ax"
+#if CONFIG_MANUAL_RESET_VECTOR
 	.org	0x0
-	/* this is very important - here is the reset vector */
-	/* in current MMU branch you don't care what is here - it is
-	 * used from bootloader site - but this is correct for FS-BOOT */
-	brai	0x70
+	brai	CONFIG_MANUAL_RESET_VECTOR
+#endif
 	.org	0x8
 	brai	TOPHYS(_user_exception); /* syscall handler */
 	.org	0x10
diff --git a/arch/microblaze/kernel/setup.c b/arch/microblaze/kernel/setup.c
index 9312fbb..8e2c09b 100644
--- a/arch/microblaze/kernel/setup.c
+++ b/arch/microblaze/kernel/setup.c
@@ -95,7 +95,8 @@ inline unsigned get_romfs_len(unsigned *addr)
 void __init machine_early_init(const char *cmdline, unsigned int ram,
 		unsigned int fdt, unsigned int msr)
 {
-	unsigned long *src, *dst = (unsigned long *)0x0;
+	unsigned long *src, *dst;
+	unsigned int offset = 0;
 
 	/* If CONFIG_MTD_UCLINUX is defined, assume ROMFS is at the
 	 * end of kernel. There are two position which we want to check.
@@ -168,7 +169,14 @@ void __init machine_early_init(const char *cmdline, unsigned int ram,
 				"CPU have it %x\n", msr);
 #endif
 
-	for (src = __ivt_start; src < __ivt_end; src++, dst++)
+	/* Do not copy reset vectors. offset = 0x2 means skip the first
+	 * two instructions. dst is pointer to MB vectors which are placed
+	 * in block ram. If you want to copy reset vector setup offset to 0x0 */
+#if !CONFIG_MANUAL_RESET_VECTOR
+	offset = 0x2;
+#endif
+	dst = (unsigned long *) (offset * sizeof(u32));
+	for (src = __ivt_start + offset; src < __ivt_end; src++, dst++)
 		*dst = *src;
 
 	/* Initialize global data */
-- 
cgit v0.10.2