31,7 → 31,7 |
#include <arch/asm/boot.h> |
#include <arch/context_offset.h> |
#include <arch/stack.h> |
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.text |
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.set noat |
75,18 → 75,6 |
mfhi $at |
sw $at, EOFFSET_HI(\r) |
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#ifdef CONFIG_DEBUG_ALLREGS |
sw $s0, EOFFSET_S0(\r) |
sw $s1, EOFFSET_S1(\r) |
sw $s2, EOFFSET_S2(\r) |
sw $s3, EOFFSET_S3(\r) |
sw $s4, EOFFSET_S4(\r) |
sw $s5, EOFFSET_S5(\r) |
sw $s6, EOFFSET_S6(\r) |
sw $s7, EOFFSET_S7(\r) |
sw $s8, EOFFSET_S8(\r) |
#endif |
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sw $gp, EOFFSET_GP(\r) |
sw $ra, EOFFSET_RA(\r) |
sw $k1, EOFFSET_K1(\r) |
132,17 → 120,6 |
lw $t8, EOFFSET_T8(\r) |
lw $t9, EOFFSET_T9(\r) |
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#ifdef CONFIG_DEBUG_ALLREGS |
lw $s0, EOFFSET_S0(\r) |
lw $s1, EOFFSET_S1(\r) |
lw $s2, EOFFSET_S2(\r) |
lw $s3, EOFFSET_S3(\r) |
lw $s4, EOFFSET_S4(\r) |
lw $s5, EOFFSET_S5(\r) |
lw $s6, EOFFSET_S6(\r) |
lw $s7, EOFFSET_S7(\r) |
lw $s8, EOFFSET_S8(\r) |
#endif |
lw $gp, EOFFSET_GP(\r) |
lw $ra, EOFFSET_RA(\r) |
lw $k1, EOFFSET_K1(\r) |
175,9 → 152,9 |
ori $k0, $k0, %lo(supervisor_sp) |
# Move $k0 (superveisor_sp) |
lw $k0, 0($k0) |
1: |
1: |
.endm |
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.org 0x0 |
kernel_image_start: |
/* Load temporary stack */ |
184,31 → 161,12 |
lui $sp, %hi(end_stack) |
ori $sp, $sp, %lo(end_stack) |
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/* $a1 contains physical address of bootinfo_t */ |
/* $a2 contains size of bootinfo_t */ |
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beq $a2, $0, bootinfo_end |
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/* 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 |
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lui $a3, %hi(bootinfo) |
ori $a3, $a3, %lo(bootinfo) |
/* $a1 contains physical address of bootinfo_t */ |
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bootinfo_loop: |
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lw $v0, 0($a1) |
sw $v0, 0($a3) |
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addi $a1, $a1, 4 |
addi $a3, $a3, 4 |
addi $a2, $a2, -4 |
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bgtz $a2, bootinfo_loop |
nop |
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bootinfo_end: |
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jal arch_pre_main |
nop |
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228,8 → 186,8 |
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exception_entry: |
j exception_handler |
nop |
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nop |
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exception_handler: |
KERNEL_STACK_TO_K0 |
sub $k0, REGISTER_SPACE |
238,17 → 196,17 |
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mfc0 $k0, $cause |
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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 |
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beqz $k0, syscall_shortcut |
add $k0, 8 # Revert $k0 back to correct exc number |
add $k0, 8 # Revert $k0 back to correct exc number |
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REGISTERS_STORE_AND_EXC_RESET $sp |
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move $a1, $sp |
jal exc_dispatch # exc_dispatch(excno, register_space) |
jal exc_dispatch # exc_dispatch(excno, register_space) |
move $a0, $k0 |
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REGISTERS_LOAD $sp |