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linux/arch/sh/boot/compressed/head_32.S

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
/*
* linux/arch/sh/boot/compressed/head.S
*
* Copyright (C) 1999 Stuart Menefy
* Copyright (C) 2003 SUGIOKA Toshinobu
*/
.text
sh: Fix .empty_zero_page alignment for PAGE_SIZE > 4096. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-11 23:53:29 +00:00
#include <asm/page.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
.global startup
startup:
/* Load initial status register */
mov.l init_sr, r1
ldc r1, sr
/* Move myself to proper location if necessary */
mova 1f, r0
mov.l 1f, r2
cmp/eq r2, r0
bt clear_bss
sub r0, r2
mov.l bss_start_addr, r0
sh: Remove implicit sign extension from assembler immediates The SH instruction set has several instructions which accept an 8 bit immediate operand. For logical instructions this operand is zero extended, for arithmetic instructions the operand is sign extended. After adding an option to the assembler to check this, it was found that several pieces of assembly code were assuming this behaviour, and in one case getting it wrong. So this patch explicitly sign extends any immediate operands, which makes it obvious what is happening, and fixes the one case which got it wrong. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-24 08:09:53 +00:00
mov #0xffffffe0, r1
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
and r1, r0 ! align cache line
mov.l text_start_addr, r3
mov r0, r1
sub r2, r1
3:
mov.l @r1, r4
mov.l @(4,r1), r5
mov.l @(8,r1), r6
mov.l @(12,r1), r7
mov.l @(16,r1), r8
mov.l @(20,r1), r9
mov.l @(24,r1), r10
mov.l @(28,r1), r11
mov.l r4, @r0
mov.l r5, @(4,r0)
mov.l r6, @(8,r0)
mov.l r7, @(12,r0)
mov.l r8, @(16,r0)
mov.l r9, @(20,r0)
mov.l r10, @(24,r0)
mov.l r11, @(28,r0)
#ifdef CONFIG_CPU_SH4
ocbwb @r0
#endif
cmp/hi r3, r0
add #-32, r0
bt/s 3b
add #-32, r1
mov.l 2f, r0
jmp @r0
nop
.align 2
1: .long 1b
2: .long clear_bss
text_start_addr:
.long startup
/* Clear BSS */
clear_bss:
mov.l end_addr, r1
mov.l bss_start_addr, r2
mov #0, r0
l1:
mov.l r0, @-r1
cmp/eq r1,r2
bf l1
/* Set the initial pointer. */
mov.l init_stack_addr, r0
mov.l @r0, r15
/* Decompress the kernel */
mov.l decompress_kernel_addr, r0
jsr @r0
nop
/* Jump to the start of the decompressed kernel */
mov.l kernel_start_addr, r0
jmp @r0
nop
.align 2
bss_start_addr:
.long __bss_start
end_addr:
.long _end
init_sr:
sh: boot kernel with SR.BL set Update the SH kernel to keep SR.BL set until the VBR register has been initialized. Useful to allow boot of the kernel even though exceptions are pending. Without this patch there is a window of time when exceptions such as NMI are enabled but no exception handlers are installed. This patch modifies both the zImage loader and the actual kernel to boot with BL=1, but the zImage loader is modfied in such a way that the init_sr value is unchanged to not break the zImage loader provided by kexec. Tested on sh7724 Ecovec and on the SH4AL-DSP core included in sh7372. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-09-24 09:05:38 +00:00
.long 0x500000F0 /* Privileged mode, Bank=0, Block=1, IMASK=0xF */
kexec_magic:
.long 0x400000F0 /* magic used by kexec to parse zImage format */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
init_stack_addr:
.long stack_start
decompress_kernel_addr:
.long decompress_kernel
kernel_start_addr:
sh: Fix address to decompress at when CONFIG_32BIT=y When running in 32BIT mode the P1SEG region doesn't necessarily provide a window onto RAM (it depends how the bootloader setup the PMB). The correct location to place the decompressed kernel is the physical address of _text. Signed-off-by: Matt Fleming <matt@console-pimps.org>
2010-04-24 12:28:20 +00:00
#ifdef CONFIG_32BIT
.long ___pa(_text+PAGE_SIZE)
#else
sh: Fix .empty_zero_page alignment for PAGE_SIZE > 4096. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-11 23:53:29 +00:00
.long _text+PAGE_SIZE
sh: Fix address to decompress at when CONFIG_32BIT=y When running in 32BIT mode the P1SEG region doesn't necessarily provide a window onto RAM (it depends how the bootloader setup the PMB). The correct location to place the decompressed kernel is the physical address of _text. Signed-off-by: Matt Fleming <matt@console-pimps.org>
2010-04-24 12:28:20 +00:00
#endif
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
.align 9
fake_headers_as_bzImage:
.word 0
.ascii "HdrS" ! header signature
.word 0x0202 ! header version number (>= 0x0105)
! or else old loadlin-1.5 will fail)
.word 0 ! default_switch
.word 0 ! SETUPSEG
.word 0x1000
.word 0 ! pointing to kernel version string
.byte 0 ! = 0, old one (LILO, Loadlin,
! 0xTV: T=0 for LILO
! V = version
.byte 1 ! Load flags bzImage=1
.word 0x8000 ! size to move, when setup is not
.long 0x100000 ! 0x100000 = default for big kernel
.long 0 ! address of loaded ramdisk image
.long 0 # its size in bytes
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