| 31,6 → 31,123 |
|---|
| |
| .section K_UNMAPPED_TEXT_START, "ax" |
| |
| .macro CONTEXT_STORE |
| |
| # save R12 in SPRG1, backup CR in R12 |
| # save SP in SPRG2 |
| |
| mtsprg1 r12 |
| mfcr r12 |
| mtsprg2 sp |
| |
| # check whether SP is in kernel |
| |
| andis. sp, sp, 0x8000 |
| bne 1f |
| |
| # stack is in user-space |
| |
| mfsprg0 sp |
| |
| b 2f |
| |
| 1: |
| |
| # stack is in kernel |
| |
| mfsprg2 sp |
| subis sp, sp, 0x8000 |
| |
| 2: |
| |
| subi sp, sp, 160 |
| stw r0, 8(sp) |
| stw r2, 12(sp) |
| stw r3, 16(sp) |
| stw r4, 20(sp) |
| stw r5, 24(sp) |
| stw r6, 28(sp) |
| stw r7, 32(sp) |
| stw r8, 36(sp) |
| stw r9, 40(sp) |
| stw r10, 44(sp) |
| stw r11, 48(sp) |
| stw r13, 52(sp) |
| stw r14, 56(sp) |
| stw r15, 60(sp) |
| stw r16, 64(sp) |
| stw r17, 68(sp) |
| stw r18, 72(sp) |
| stw r19, 76(sp) |
| stw r20, 80(sp) |
| stw r21, 84(sp) |
| stw r22, 88(sp) |
| stw r23, 92(sp) |
| stw r24, 96(sp) |
| stw r25, 100(sp) |
| stw r26, 104(sp) |
| stw r27, 108(sp) |
| stw r28, 112(sp) |
| stw r29, 116(sp) |
| stw r30, 120(sp) |
| stw r31, 124(sp) |
| |
| stw r12, 128(sp) |
| |
| mfsrr0 r12 |
| stw r12, 132(sp) |
| |
| mfsrr1 r12 |
| stw r12, 136(sp) |
| |
| mflr r12 |
| stw r12, 140(sp) |
| |
| mfctr r12 |
| stw r12, 144(sp) |
| |
| mfxer r12 |
| stw r12, 148(sp) |
| |
| mfsprg1 r12 |
| stw r12, 152(sp) |
| |
| mfsprg2 r12 |
| stw r12, 156(sp) |
| .endm |
| |
| .org 0x060 |
| jump_to_kernel: |
| lis r12, iret@ha |
| addi r12, r12, iret@l |
| mtlr r12 |
| |
| mfmsr r12 |
| ori r12, r12, (msr_ir | msr_dr)@l |
| mtsrr1 r12 |
| |
| addis sp, sp, 0x8000 |
| mr r4, sp |
| addi r4, r4, 8 |
| |
| rfi |
| |
| jump_to_kernel_syscall: |
| lis r12, syscall_handler@ha |
| addi r12, r12, syscall_handler@l |
| mtsrr0 r12 |
| |
| lis r12, iret_syscall@ha |
| addi r12, r12, iret_syscall@l |
| mtlr r12 |
| |
| mfmsr r12 |
| ori r12, r12, (msr_ir | msr_dr)@l |
| mtsrr1 r12 |
| |
| addis sp, sp, 0x8000 |
| rfi |
| |
| .org 0x100 |
| .global exc_system_reset |
| exc_system_reset: |
| 44,23 → 161,27 |
|---|
| .org 0x300 |
| .global exc_data_storage |
| exc_data_storage: |
| b exc_data_storage |
| CONTEXT_STORE |
| |
| lis r12, pht_refill@ha |
| addi r12, r12, pht_refill@l |
| mtsrr0 r12 |
| |
| li r3, 1 |
| b jump_to_kernel |
| |
| .org 0x380 |
| .global exc_data_segment |
| exc_data_segment: |
| b exc_data_segment |
| |
| .org 0x400 |
| .global exc_instruction_storage |
| exc_instruction_storage: |
| b exc_instruction_storage |
| CONTEXT_STORE |
| |
| lis r12, pht_refill@ha |
| addi r12, r12, pht_refill@l |
| mtsrr0 r12 |
| |
| li r3, 0 |
| b jump_to_kernel |
| |
| .org 0x480 |
| .global exc_instruction_segment |
| exc_instruction_segment: |
| b exc_instruction_segment |
| |
| .org 0x500 |
| .global exc_external |
| exc_external: |
| 84,76 → 205,14 |
|---|
| .org 0x900 |
| .global exc_decrementer |
| exc_decrementer: |
| mtspr sprg1, sp |
| |
| subis sp, sp, 0x8000 |
| |
| subi sp, sp, 144 |
| stw r0, 0(sp) |
| stw r2, 4(sp) |
| stw r3, 8(sp) |
| stw r4, 12(sp) |
| stw r5, 16(sp) |
| stw r6, 20(sp) |
| stw r7, 24(sp) |
| stw r8, 28(sp) |
| stw r9, 32(sp) |
| stw r10, 36(sp) |
| stw r11, 40(sp) |
| stw r12, 44(sp) |
| stw r13, 48(sp) |
| stw r14, 52(sp) |
| stw r15, 56(sp) |
| stw r16, 60(sp) |
| stw r17, 64(sp) |
| stw r18, 68(sp) |
| stw r19, 72(sp) |
| stw r20, 76(sp) |
| stw r21, 80(sp) |
| stw r22, 84(sp) |
| stw r23, 88(sp) |
| stw r24, 92(sp) |
| stw r25, 96(sp) |
| stw r26, 100(sp) |
| stw r27, 104(sp) |
| stw r28, 108(sp) |
| stw r29, 112(sp) |
| stw r30, 116(sp) |
| stw r31, 120(sp) |
| |
| mfspr r3, srr0 |
| stw r3, 124(sp) |
| |
| mfspr r3, srr1 |
| stw r3, 128(sp) |
| |
| mflr r3 |
| stw r3, 132(sp) |
| |
| mfcr r3 |
| stw r3, 136(sp) |
| |
| mfctr r3 |
| stw r3, 140(sp) |
| |
| mfxer r3 |
| stw r3, 144(sp) |
| CONTEXT_STORE |
| |
| lis r3, exc_dispatch@ha |
| addi r3, r3, exc_dispatch@l |
| mtspr srr0, r3 |
| lis r12, exc_dispatch@ha |
| addi r12, r12, exc_dispatch@l |
| mtsrr0 r12 |
| |
| mfmsr r3 |
| ori r3, r3, (msr_ir | msr_dr)@l |
| mtspr srr1, r3 |
| |
| lis r3, iret@ha |
| addi r3, r3, iret@l |
| mtlr r3 |
| |
| addis sp, sp, 0x8000 |
| li r3, 10 |
| rfid |
| b jump_to_kernel |
| |
| .org 0xa00 |
| .global exc_reserved0 |
| 168,7 → 227,9 |
|---|
| .org 0xc00 |
| .global exc_syscall |
| exc_syscall: |
| b exc_syscall |
| CONTEXT_STORE |
| |
| b jump_to_kernel_syscall |
| |
| .org 0xd00 |
| .global exc_trace |