[POWERPC] PS3: Bootwrapper support.

Add support to build the PS3 flash rom image and remove some unneeded
lmb calls.

The PS3's lv1 loader supports loading gzipped binary images from flash
rom to addr zero. The loader enters the image at addr 0x100.

In this implementation a bootwrapper overlay is use to arrange for the
kernel to be loaded to addr zero and to have a suitable bootwrapper
entry at 0x100.  To construct the rom image, 0x100 bytes from offset
0x100 in the kernel is copied to the bootwrapper symbol
__system_reset_kernel.  The 0x100 bytes at the bootwrapper symbol
__system_reset_overlay is then copied to offset 0x100.  At runtime the
bootwrapper program copies the 0x100 bytes at __system_reset_kernel to
addr 0x100.

zImage.ps3 is a wrapped image that contains a flat device tree, an lv1
compatible entry point, and an optional initrd.  otheros.bld is the gzip
compresed rom image built from zImage.ps3.  otheros.bld is suitable for
programming into the PS3 boot flash memory.

Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 184 insertions, 0 deletions

diff --git a/arch/powerpc/boot/ps3-hvcall.S b/arch/powerpc/boot/ps3-hvcall.S
new file mode 100644
index 0000000..c8b7df3
--- /dev/null
+++ b/arch/powerpc/boot/ps3-hvcall.S
@@ -0,0 +1,184 @@
+/*
+ *  PS3 bootwrapper hvcalls.
+ *
+ *  Copyright (C) 2007 Sony Computer Entertainment Inc.
+ *  Copyright 2007 Sony Corp.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "ppc_asm.h"
+
+/*
+ * The PS3 hypervisor uses a 64 bit "C" language calling convention.
+ * The routines here marshal arguments between the 32 bit wrapper
+ * program and the 64 bit hvcalls.
+ *
+ *  wrapper           lv1
+ *  32-bit (h,l)      64-bit
+ *
+ *  1: r3,r4          <-> r3
+ *  2: r5,r6          <-> r4
+ *  3: r7,r8          <-> r5
+ *  4: r9,r10         <-> r6
+ *  5: 8(r1),12(r1)   <-> r7
+ *  6: 16(r1),20(r1)  <-> r8
+ *  7: 24(r1),28(r1)  <-> r9
+ *  8: 32(r1),36(r1)  <-> r10
+ *
+ */
+
+.macro GLOBAL name
+	.section ".text"
+	.balign 4
+	.globl \name
+\name:
+.endm
+
+.macro NO_SUPPORT name
+	GLOBAL \name
+	b ps3_no_support
+.endm
+
+.macro HVCALL num
+	li r11, \num
+	.long 0x44000022
+	extsw r3, r3
+.endm
+
+.macro SAVE_LR offset=4
+	mflr r0
+	stw r0, \offset(r1)
+.endm
+
+.macro LOAD_LR offset=4
+	lwz r0, \offset(r1)
+	mtlr r0
+.endm
+
+.macro LOAD_64_REG target,high,low
+	sldi r11, \high, 32
+	or \target, r11, \low
+.endm
+
+.macro LOAD_64_STACK target,offset
+	ld \target, \offset(r1)
+.endm
+
+.macro LOAD_R3
+	LOAD_64_REG r3,r3,r4
+.endm
+
+.macro LOAD_R4
+	LOAD_64_REG r4,r5,r6
+.endm
+
+.macro LOAD_R5
+	LOAD_64_REG r5,r7,r8
+.endm
+
+.macro LOAD_R6
+	LOAD_64_REG r6,r9,r10
+.endm
+
+.macro LOAD_R7
+	LOAD_64_STACK r7,8
+.endm
+
+.macro LOAD_R8
+	LOAD_64_STACK r8,16
+.endm
+
+.macro LOAD_R9
+	LOAD_64_STACK r9,24
+.endm
+
+.macro LOAD_R10
+	LOAD_64_STACK r10,32
+.endm
+
+.macro LOAD_REGS_0
+	stwu 1,-16(1)
+	stw 3, 8(1)
+.endm
+
+.macro LOAD_REGS_5
+	LOAD_R3
+	LOAD_R4
+	LOAD_R5
+	LOAD_R6
+	LOAD_R7
+.endm
+
+.macro LOAD_REGS_6
+	LOAD_REGS_5
+	LOAD_R8
+.endm
+
+.macro LOAD_REGS_8
+	LOAD_REGS_6
+	LOAD_R9
+	LOAD_R10
+.endm
+
+.macro STORE_REGS_0_1
+	lwz r11, 8(r1)
+	std r4, 0(r11)
+	mr r4, r3
+	li r3, 0
+	addi r1,r1,16
+.endm
+
+.macro STORE_REGS_5_2
+	lwz r11, 16(r1)
+	std r4, 0(r11)
+	lwz r11, 24(r1)
+	std r5, 0(r11)
+.endm
+
+.macro STORE_REGS_6_1
+	lwz r11, 24(r1)
+	std r4, 0(r11)
+.endm
+
+GLOBAL lv1_get_logical_ppe_id
+	SAVE_LR
+	LOAD_REGS_0
+	HVCALL 69
+	STORE_REGS_0_1
+	LOAD_LR
+	blr
+
+GLOBAL lv1_get_logical_partition_id
+	SAVE_LR
+	LOAD_REGS_0
+	HVCALL 74
+	STORE_REGS_0_1
+	LOAD_LR
+	blr
+
+GLOBAL lv1_get_repository_node_value
+	SAVE_LR
+	LOAD_REGS_5
+	HVCALL 91
+	STORE_REGS_5_2
+	LOAD_LR
+	blr
+
+GLOBAL lv1_panic
+	SAVE_LR
+	LOAD_REGS_8
+	HVCALL 255
+	LOAD_LR
+	blr