LowLevel/Luma3DS-3GX
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Attempt to detect booting from firm

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TuxSH 2017-08-11 23:33:21 +02:00
parent 6b9b0472bc
commit d4193ec11d
1 changed files with 14 additions and 0 deletions
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source/start.s
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@ -31,6 +31,20 @@ _start:
orr r4, #0x1C0 orr r4, #0x1C0
msr cpsr_cxsf, r4 msr cpsr_cxsf, r4
@ Check if r2 is 0 (r0-sp are supposed to be 0), and for regions 0, 5 and 7 of the MPU config
@ This is not foolproof but should work well enough
cmp r2, #0
ldreq r4, =0x20000035
mrceq p15, 0, r5, c6, c0, 0
cmpeq r4, r5
mrceq p15, 0, r5, c6, c5, 0
ldreq r4, =0x07FF801D
cmpeq r4, r5
mrceq p15, 0, r5, c6, c7, 0
ldreq r4, =0x1FFFE019
cmpeq r4, r5
ldreq r2, =0xCAFE
mov r9, r0 mov r9, r0
mov r10, r1 mov r10, r1
mov r11, r2 mov r11, r2