diff options
Diffstat (limited to 'utils/hwstub/stub/crt0.S')
-rw-r--r-- | utils/hwstub/stub/crt0.S | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/utils/hwstub/stub/crt0.S b/utils/hwstub/stub/crt0.S index e2d4742d36..5ba71905c9 100644 --- a/utils/hwstub/stub/crt0.S +++ b/utils/hwstub/stub/crt0.S | |||
@@ -3,8 +3,30 @@ | |||
3 | .align 0x04 | 3 | .align 0x04 |
4 | .global start | 4 | .global start |
5 | start: | 5 | start: |
6 | sub r7, pc, #8 /* Copy running address */ | ||
6 | msr cpsr_c, #0xd3 /* enter supervisor mode, disable IRQ/FIQ */ | 7 | msr cpsr_c, #0xd3 /* enter supervisor mode, disable IRQ/FIQ */ |
8 | /* Disable MMU, disable caching and buffering; | ||
9 | * use low exception range address */ | ||
10 | mrc p15, 0, r0, c1, c0, 0 | ||
11 | ldr r1, =0x3005 | ||
12 | bic r0, r1 | ||
13 | mcr p15, 0, r0, c1, c0, 0 | ||
7 | ldr sp, =oc_stackend | 14 | ldr sp, =oc_stackend |
15 | /* Relocate to right address */ | ||
16 | mov r2, r7 | ||
17 | ldr r3, =_copystart | ||
18 | ldr r4, =_copyend | ||
19 | 1: | ||
20 | cmp r4, r3 | ||
21 | ldrhi r5, [r2], #4 | ||
22 | strhi r5, [r3], #4 | ||
23 | bhi 1b | ||
24 | |||
25 | mov r2, #0 | ||
26 | mcr p15, 0, r2, c7, c5, 0 @ Invalidate ICache | ||
27 | /* Jump to real location */ | ||
28 | ldr pc, =remap | ||
29 | remap: | ||
8 | /* clear bss */ | 30 | /* clear bss */ |
9 | ldr r2, =bss_start | 31 | ldr r2, =bss_start |
10 | ldr r3, =bss_end | 32 | ldr r3, =bss_end |