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set sensible stacks for bios call

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This commit is contained in:
Dave Murphy 2009-10-07 20:01:51 +00:00
parent b4e81289c5
commit bc5cd112ab
1 changed files with 8 additions and 8 deletions
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16
dkarm-eabi/crtls/ds_arm9_crt0.s
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@ -102,7 +102,6 @@ _start:
ldr r0,=( PAGE_4K | 0x00000000 | 1) ldr r0,=( PAGE_4K | 0x00000000 | 1)
mcr p15, 0, r0, c6, c2, 0 mcr p15, 0, r0, c6, c2, 0
@------------------------------------------------------------------------- @-------------------------------------------------------------------------
@ Region 3 - DTCM @ Region 3 - DTCM
@------------------------------------------------------------------------- @-------------------------------------------------------------------------
@ -127,16 +126,17 @@ _start:
ands r0,r0,#0x8000 ands r0,r0,#0x8000
bne dsi_mode bne dsi_mode
@ set sensible stacks to allow bios call
mov r0, #0x13 @ Switch to SVC Mode mov r0, #0x13 @ Switch to SVC Mode
msr cpsr, r0 msr cpsr, r0
mov r1,#0x03000000
mrc p15, 0, r0, c1, c0, 0 sub r1,r1,#0x1000
orr r0,r0,#DTCM_ENABLE mov sp,r1
mcr p15, 0, r0, c1, c0, 0 mov r0, #0x1F @ Switch to System Mode
msr cpsr, r0
ldr sp, =__sp_svc @ Set SVC stack sub r1,r1,#0x100
mov sp,r1
mov r11,r11
swi 0xf0000 swi 0xf0000
ldr r1,=( PAGE_128M | 0x08000000 | 1) ldr r1,=( PAGE_128M | 0x08000000 | 1)