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set stacks before mpu setup call

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This commit is contained in:
Dave Murphy 2010-02-17 03:13:46 +00:00
parent 6c1a47754e
commit e0d9719a14
1 changed files with 15 additions and 5 deletions
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20
dkarm-eabi/crtls/ds_arm9_crt0.s
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@ -17,10 +17,20 @@
_start:
@---------------------------------------------------------------------------------
mov r0, #0x04000000 @ IME = 0;
mov r1, #0
str r1, [r0, #0x208]
str r0, [r0, #0x208]
mov sp, #0x0300000
@ set sensible stacks to allow bios call
mov r0, #0x13 @ Switch to SVC Mode
msr cpsr, r0
mov r1,#0x03000000
sub r1,r1,#0x1000
mov sp,r1
mov r0, #0x1F @ Switch to System Mode
msr cpsr, r0
sub r1,r1,#0x100
mov sp,r1
ldr r3, =__libnds_mpu_setup
blx r3
@ -41,7 +51,7 @@ _start:
ldr r4, =__itcm_end
bl CopyMemCheck
ldr r1, =__vectors_lma @ Copy reserved vectors area (itcm section) from LMA to VMA
ldr r1, =__vectors_lma @ Copy reserved vectors area (itcm section) from LMA to VMA
ldr r2, =__vectors_start
ldr r4, =__vectors_end
bl CopyMemCheck
@ -181,7 +191,7 @@ CopyMem:
@---------------------------------------------------------------------------------
mov r0, #3 @ These commands are used in cases where
add r3, r3, r0 @ the length is not a multiple of 4,
bics r3, r3, r0 @ even though it should be.
bics r3, r3, r0 @ even though it should be.
bxeq lr @ Length is zero, so exit
CIDLoop:
ldmia r1!, {r0}