| 31,7 → 31,7 |
|---|
| #include <arch/asm/boot.h> |
| #include <arch/context_offset.h> |
| #include <arch/stack.h> |
| |
| |
| .text |
| |
| .set noat |
| 152,9 → 152,9 |
|---|
| ori $k0, $k0, %lo(supervisor_sp) |
| # Move $k0 (superveisor_sp) |
| lw $k0, 0($k0) |
| 1: |
| 1: |
| .endm |
| |
| |
| .org 0x0 |
| kernel_image_start: |
| /* Load temporary stack */ |
| 161,31 → 161,12 |
|---|
| lui $sp, %hi(end_stack) |
| ori $sp, $sp, %lo(end_stack) |
| |
| /* $a1 contains physical address of bootinfo_t */ |
| /* $a2 contains size of bootinfo_t */ |
| |
| beq $a2, $0, bootinfo_end |
| |
| /* Not sure about this, but might be needed for PIC code???? */ |
| /* Not sure about this, but might |
| be needed for PIC code */ |
| lui $gp, 0x8000 |
| |
| lui $a3, %hi(bootinfo) |
| ori $a3, $a3, %lo(bootinfo) |
| /* $a1 contains physical address of bootinfo_t */ |
| |
| bootinfo_loop: |
| |
| lw $v0, 0($a1) |
| sw $v0, 0($a3) |
| |
| addi $a1, $a1, 4 |
| addi $a3, $a3, 4 |
| addi $a2, $a2, -4 |
| |
| bgtz $a2, bootinfo_loop |
| nop |
| |
| bootinfo_end: |
| |
| jal arch_pre_main |
| nop |
| |
| 205,8 → 186,8 |
|---|
| |
| exception_entry: |
| j exception_handler |
| nop |
| |
| nop |
| |
| exception_handler: |
| KERNEL_STACK_TO_K0 |
| sub $k0, REGISTER_SPACE |
| 215,17 → 196,17 |
|---|
| |
| mfc0 $k0, $cause |
| |
| sra $k0, $k0, 0x2 # cp0_exc_cause() part 1 |
| andi $k0, $k0, 0x1f # cp0_exc_cause() part 2 |
| sub $k0, 8 # 8 = SYSCALL |
| sra $k0, $k0, 0x2 # cp0_exc_cause() part 1 |
| andi $k0, $k0, 0x1f # cp0_exc_cause() part 2 |
| sub $k0, 8 # 8 = SYSCALL |
| |
| beqz $k0, syscall_shortcut |
| add $k0, 8 # Revert $k0 back to correct exc number |
| add $k0, 8 # Revert $k0 back to correct exc number |
| |
| REGISTERS_STORE_AND_EXC_RESET $sp |
| |
| move $a1, $sp |
| jal exc_dispatch # exc_dispatch(excno, register_space) |
| jal exc_dispatch # exc_dispatch(excno, register_space) |
| move $a0, $k0 |
| |
| REGISTERS_LOAD $sp |