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-rw-r--r--arch/xtensa/kernel/Makefile2
-rw-r--r--arch/xtensa/kernel/head.S37
-rw-r--r--arch/xtensa/kernel/vectors.S3
-rw-r--r--arch/xtensa/kernel/vmlinux.lds.S48
4 files changed, 63 insertions, 27 deletions
diff --git a/arch/xtensa/kernel/Makefile b/arch/xtensa/kernel/Makefile
index c3a59d9..c433a56 100644
--- a/arch/xtensa/kernel/Makefile
+++ b/arch/xtensa/kernel/Makefile
@@ -12,6 +12,8 @@ obj-$(CONFIG_KGDB) += xtensa-stub.o
obj-$(CONFIG_PCI) += pci.o
obj-$(CONFIG_MODULES) += xtensa_ksyms.o module.o
+AFLAGS_head.o += -mtext-section-literals
+
# In the Xtensa architecture, assembly generates literals which must always
# precede the L32R instruction with a relative offset less than 256 kB.
# Therefore, the .text and .literal section must be combined in parenthesis
diff --git a/arch/xtensa/kernel/head.S b/arch/xtensa/kernel/head.S
index 4566683..ef12c0e 100644
--- a/arch/xtensa/kernel/head.S
+++ b/arch/xtensa/kernel/head.S
@@ -48,17 +48,36 @@
*/
__HEAD
+ .begin no-absolute-literals
+
ENTRY(_start)
- _j 2f
+ /* Preserve the pointer to the boot parameter list in EXCSAVE_1 */
+ wsr a2, excsave1
+ _j _SetupMMU
+
+ .align 4
+ .literal_position
+.Lstartup:
+ .word _startup
+
.align 4
-1: .word _startup
-2: l32r a0, 1b
+ .global _SetupMMU
+_SetupMMU:
+ Offset = _SetupMMU - _start
+
+#ifdef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
+ initialize_mmu
+#endif
+ .end no-absolute-literals
+
+ l32r a0, .Lstartup
jx a0
ENDPROC(_start)
- .section .init.text, "ax"
+ __INIT
+ .literal_position
ENTRY(_startup)
@@ -67,10 +86,6 @@ ENTRY(_startup)
movi a0, LOCKLEVEL
wsr a0, ps
- /* Preserve the pointer to the boot parameter list in EXCSAVE_1 */
-
- wsr a2, excsave1
-
/* Start with a fresh windowbase and windowstart. */
movi a1, 1
@@ -158,8 +173,6 @@ ENTRY(_startup)
isync
- initialize_mmu
-
/* Unpack data sections
*
* The linker script used to build the Linux kernel image
@@ -207,6 +220,10 @@ ENTRY(_startup)
___flush_dcache_all a2 a3
#endif
+ memw
+ isync
+ ___invalidate_icache_all a2 a3
+ isync
/* Setup stack and enable window exceptions (keep irqs disabled) */
diff --git a/arch/xtensa/kernel/vectors.S b/arch/xtensa/kernel/vectors.S
index 82109b42..a7e1d08 100644
--- a/arch/xtensa/kernel/vectors.S
+++ b/arch/xtensa/kernel/vectors.S
@@ -50,6 +50,7 @@
#include <asm/processor.h>
#include <asm/page.h>
#include <asm/thread_info.h>
+#include <asm/vectors.h>
#define WINDOW_VECTORS_SIZE 0x180
@@ -220,7 +221,7 @@ ENTRY(_DoubleExceptionVector)
xsr a0, depc # get DEPC, save a0
- movi a3, XCHAL_WINDOW_VECTORS_VADDR
+ movi a3, WINDOW_VECTORS_VADDR
_bltu a0, a3, .Lfixup
addi a3, a3, WINDOW_VECTORS_SIZE
_bgeu a0, a3, .Lfixup
diff --git a/arch/xtensa/kernel/vmlinux.lds.S b/arch/xtensa/kernel/vmlinux.lds.S
index 1469524..21acd11 100644
--- a/arch/xtensa/kernel/vmlinux.lds.S
+++ b/arch/xtensa/kernel/vmlinux.lds.S
@@ -18,6 +18,7 @@
#include <asm/page.h>
#include <asm/thread_info.h>
+#include <asm/vectors.h>
#include <variant/core.h>
#include <platform/hardware.h>
OUTPUT_ARCH(xtensa)
@@ -30,7 +31,7 @@ jiffies = jiffies_64;
#endif
#ifndef KERNELOFFSET
-#define KERNELOFFSET 0xd0001000
+#define KERNELOFFSET 0xd0003000
#endif
/* Note: In the following macros, it would be nice to specify only the
@@ -185,16 +186,16 @@ SECTIONS
SECTION_VECTOR (_WindowVectors_text,
.WindowVectors.text,
- XCHAL_WINDOW_VECTORS_VADDR, 4,
+ WINDOW_VECTORS_VADDR, 4,
.dummy)
SECTION_VECTOR (_DebugInterruptVector_literal,
.DebugInterruptVector.literal,
- XCHAL_DEBUG_VECTOR_VADDR - 4,
+ DEBUG_VECTOR_VADDR - 4,
SIZEOF(.WindowVectors.text),
.WindowVectors.text)
SECTION_VECTOR (_DebugInterruptVector_text,
.DebugInterruptVector.text,
- XCHAL_DEBUG_VECTOR_VADDR,
+ DEBUG_VECTOR_VADDR,
4,
.DebugInterruptVector.literal)
#undef LAST
@@ -202,7 +203,7 @@ SECTIONS
#if XCHAL_EXCM_LEVEL >= 2
SECTION_VECTOR (_Level2InterruptVector_text,
.Level2InterruptVector.text,
- XCHAL_INTLEVEL2_VECTOR_VADDR,
+ INTLEVEL2_VECTOR_VADDR,
SIZEOF(LAST), LAST)
# undef LAST
# define LAST .Level2InterruptVector.text
@@ -210,7 +211,7 @@ SECTIONS
#if XCHAL_EXCM_LEVEL >= 3
SECTION_VECTOR (_Level3InterruptVector_text,
.Level3InterruptVector.text,
- XCHAL_INTLEVEL3_VECTOR_VADDR,
+ INTLEVEL3_VECTOR_VADDR,
SIZEOF(LAST), LAST)
# undef LAST
# define LAST .Level3InterruptVector.text
@@ -218,7 +219,7 @@ SECTIONS
#if XCHAL_EXCM_LEVEL >= 4
SECTION_VECTOR (_Level4InterruptVector_text,
.Level4InterruptVector.text,
- XCHAL_INTLEVEL4_VECTOR_VADDR,
+ INTLEVEL4_VECTOR_VADDR,
SIZEOF(LAST), LAST)
# undef LAST
# define LAST .Level4InterruptVector.text
@@ -226,7 +227,7 @@ SECTIONS
#if XCHAL_EXCM_LEVEL >= 5
SECTION_VECTOR (_Level5InterruptVector_text,
.Level5InterruptVector.text,
- XCHAL_INTLEVEL5_VECTOR_VADDR,
+ INTLEVEL5_VECTOR_VADDR,
SIZEOF(LAST), LAST)
# undef LAST
# define LAST .Level5InterruptVector.text
@@ -234,39 +235,39 @@ SECTIONS
#if XCHAL_EXCM_LEVEL >= 6
SECTION_VECTOR (_Level6InterruptVector_text,
.Level6InterruptVector.text,
- XCHAL_INTLEVEL6_VECTOR_VADDR,
+ INTLEVEL6_VECTOR_VADDR,
SIZEOF(LAST), LAST)
# undef LAST
# define LAST .Level6InterruptVector.text
#endif
SECTION_VECTOR (_KernelExceptionVector_literal,
.KernelExceptionVector.literal,
- XCHAL_KERNEL_VECTOR_VADDR - 4,
+ KERNEL_VECTOR_VADDR - 4,
SIZEOF(LAST), LAST)
#undef LAST
SECTION_VECTOR (_KernelExceptionVector_text,
.KernelExceptionVector.text,
- XCHAL_KERNEL_VECTOR_VADDR,
+ KERNEL_VECTOR_VADDR,
4,
.KernelExceptionVector.literal)
SECTION_VECTOR (_UserExceptionVector_literal,
.UserExceptionVector.literal,
- XCHAL_USER_VECTOR_VADDR - 4,
+ USER_VECTOR_VADDR - 4,
SIZEOF(.KernelExceptionVector.text),
.KernelExceptionVector.text)
SECTION_VECTOR (_UserExceptionVector_text,
.UserExceptionVector.text,
- XCHAL_USER_VECTOR_VADDR,
+ USER_VECTOR_VADDR,
4,
.UserExceptionVector.literal)
SECTION_VECTOR (_DoubleExceptionVector_literal,
.DoubleExceptionVector.literal,
- XCHAL_DOUBLEEXC_VECTOR_VADDR - 16,
+ DOUBLEEXC_VECTOR_VADDR - 16,
SIZEOF(.UserExceptionVector.text),
.UserExceptionVector.text)
SECTION_VECTOR (_DoubleExceptionVector_text,
.DoubleExceptionVector.text,
- XCHAL_DOUBLEEXC_VECTOR_VADDR,
+ DOUBLEEXC_VECTOR_VADDR,
32,
.DoubleExceptionVector.literal)
@@ -284,11 +285,26 @@ SECTIONS
. = ALIGN(0x10);
.bootstrap : { *(.bootstrap.literal .bootstrap.text .bootstrap.data) }
- .ResetVector.text XCHAL_RESET_VECTOR_VADDR :
+ .ResetVector.text RESET_VECTOR_VADDR :
{
*(.ResetVector.text)
}
+
+ /*
+ * This is a remapped copy of the Secondary Reset Vector Code.
+ * It keeps gdb in sync with the PC after switching
+ * to the temporary mapping used while setting up
+ * the V2 MMU mappings for Linux.
+ *
+ * Only debug information about this section is put in the kernel image.
+ */
+ .SecondaryResetVector.remapped_text 0x46000000 (INFO):
+ {
+ *(.SecondaryResetVector.remapped_text)
+ }
+
+
.xt.lit : { *(.xt.lit) }
.xt.prop : { *(.xt.prop) }
generated by cgit v0.10.2 at 2024-10-02 14:50:09 (GMT)