| 1 | .section ".text.boot" |
| 2 | |
| 3 | .global _start |
| 4 | |
| 5 | _start: |
| 6 | mrc p15, #0, r1, c0, c0, #5 |
| 7 | and r1, r1, #3 |
| 8 | cmp r1, #0 |
| 9 | bne halt |
| 10 | |
| 11 | mov sp, #0x8000 |
| 12 | |
| 13 | ldr r4, =__bss_start |
| 14 | ldr r9, =__bss_end |
| 15 | mov r5, #0 |
| 16 | mov r6, #0 |
| 17 | mov r7, #0 |
| 18 | mov r8, #0 |
| 19 | b 2f |
| 20 | |
| 21 | 1: |
| 22 | stmia r4!, {r5-r8} |
| 23 | |
| 24 | 2: |
| 25 | cmp r4, r9 |
| 26 | blo 1b |
| 27 | |
| 28 | ldr r3, =main |
| 29 | blx r3 |
| 30 | |
| 31 | halt: |
| 32 | wfe |
| 33 | b halt |