| /branches/network/kernel/arch/arm32/src/start.S |
|---|
| 35,11 → 35,33 |
| .global supervisor_sp |
| kernel_image_start: |
| # initialize Stack pointer for exception modes |
| mrs r4, cpsr |
| bic r4, r4, #0x1f |
| #FIQ Mode |
| orr r3, r4, #0x11 |
| msr cpsr_c, r3 |
| ldr sp, =exc_stack |
| #IRQ Mode |
| orr r3, r4, #0x12 |
| msr cpsr_c, r3 |
| ldr sp, =exc_stack |
| #ABORT Mode |
| orr r3, r4, #0x17 |
| msr cpsr_c, r3 |
| ldr sp, =exc_stack |
| #UNDEFINED Mode |
| orr r3, r4, #0x1b |
| msr cpsr_c, r3 |
| ldr sp, =exc_stack |
| # switch to supervisor mode |
| mrs r3, cpsr |
| bic r3, r3, #0x1f |
| orr r3, r3, #0x13 |
| orr r3, r4, #0x13 |
| msr cpsr_c, r3 |
| ldr sp, =temp_stack |