mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-19 20:44:04 +02:00
86 lines
1.3 KiB
ArmAsm
86 lines
1.3 KiB
ArmAsm
|
/*
|
||
|
|
* linux/arch/mips/boot/compressed/head.S
|
||
|
|
*
|
||
|
|
* Copyright (C) 2005-2008 Ingenic Semiconductor Inc.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <asm/asm.h>
|
||
|
|
#include <asm/cacheops.h>
|
||
|
|
#include <asm/cachectl.h>
|
||
|
|
#include <asm/regdef.h>
|
||
|
|
|
||
|
|
#define IndexInvalidate_I 0x00
|
||
|
|
#define IndexWriteBack_D 0x01
|
||
|
|
|
||
|
|
.set noreorder
|
||
|
|
LEAF(startup)
|
||
|
|
startup:
|
||
|
|
move s0, a0 /* Save the boot loader transfered args */
|
||
|
|
move s1, a1
|
||
|
|
move s2, a2
|
||
|
|
move s3, a3
|
||
|
|
|
||
|
|
la a0, _edata
|
||
|
|
la a1, _end
|
||
|
|
1: sw zero, 0(a0) /* Clear BSS section */
|
||
|
|
bne a1, a0, 1b
|
||
|
|
addu a0, 4
|
||
|
|
|
||
|
|
la sp, (.stack + 8192)
|
||
|
|
|
||
|
|
la a0, __image_begin
|
||
|
|
la a1, IMAGESIZE
|
||
|
|
la a2, LOADADDR
|
||
|
|
la ra, 1f
|
||
|
|
la k0, decompress_kernel
|
||
|
|
jr k0
|
||
|
|
nop
|
||
|
|
1:
|
||
|
|
|
||
|
|
move a0, s0
|
||
|
|
move a1, s1
|
||
|
|
move a2, s2
|
||
|
|
move a3, s3
|
||
|
|
li k0, KERNEL_ENTRY
|
||
|
|
jr k0
|
||
|
|
nop
|
||
|
|
2:
|
||
|
|
b 32
|
||
|
|
END(startup)
|
||
|
|
|
||
|
|
|
||
|
|
LEAF(flushcaches)
|
||
|
|
la t0, 1f
|
||
|
|
la t1, 0xa0000000
|
||
|
|
or t0, t0, t1
|
||
|
|
jr t0
|
||
|
|
nop
|
||
|
|
1:
|
||
|
|
li k0, 0x80000000 # start address
|
||
|
|
li k1, 0x80004000 # end address (16KB I-Cache)
|
||
|
|
subu k1, 128
|
||
|
|
|
||
|
|
2:
|
||
|
|
.set mips3
|
||
|
|
cache IndexWriteBack_D, 0(k0)
|
||
|
|
cache IndexWriteBack_D, 32(k0)
|
||
|
|
cache IndexWriteBack_D, 64(k0)
|
||
|
|
cache IndexWriteBack_D, 96(k0)
|
||
|
|
cache IndexInvalidate_I, 0(k0)
|
||
|
|
cache IndexInvalidate_I, 32(k0)
|
||
|
|
cache IndexInvalidate_I, 64(k0)
|
||
|
|
cache IndexInvalidate_I, 96(k0)
|
||
|
|
.set mips0
|
||
|
|
|
||
|
|
bne k0, k1, 2b
|
||
|
|
addu k0, k0, 128
|
||
|
|
la t0, 3f
|
||
|
|
jr t0
|
||
|
|
nop
|
||
|
|
3:
|
||
|
|
jr ra
|
||
|
|
nop
|
||
|
|
END(flushcaches)
|
||
|
|
|
||
|
|
.comm .stack,4096*2,4
|