| /kernel/trunk/arch/ppc32/src/asm.S |
|---|
| 30,10 → 30,39 |
| .text |
| .global userspace_asm |
| .global iret |
| .global memsetb |
| .global memcpy |
| userspace_asm: |
| # r3 = uspace_uarg |
| # r4 = stack |
| # r5 = entry |
| mfmsr r31 |
| rlwinm r31, r31, 0, 17, 15 |
| mtmsr r31 |
| # set entry point |
| mtsrr0 r5 |
| # set problem state, enable interrupts |
| ori r31, r31, 1 << 14 |
| ori r31, r31, 1 << 15 |
| mtsrr1 r31 |
| # set stack |
| mr sp, r4 |
| # jump to userspace |
| rfi |
| iret: |
| lwz r3, 144(sp) |
| mtxer r3 |