| /* |
| * Copyright (c) 2015 Travis Geiselbrecht |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining |
| * a copy of this software and associated documentation files |
| * (the "Software"), to deal in the Software without restriction, |
| * including without limitation the rights to use, copy, modify, merge, |
| * publish, distribute, sublicense, and/or sell copies of the Software, |
| * and to permit persons to whom the Software is furnished to do so, |
| * subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be |
| * included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| #include <asm.h> |
| #include <arch/mips.h> |
| |
| .section ".text.vectab" |
| FUNCTION(vectab) |
| .org 0 |
| _tlb_refill: |
| b . |
| |
| .macro iframe_save |
| .set push |
| .set noat |
| addiu $sp, -88 |
| |
| /* save all the non temporary registers */ |
| sw $at, 0($sp) |
| sw $v0, 4($sp) |
| sw $v1, 8($sp) |
| sw $a0, 12($sp) |
| sw $a1, 16($sp) |
| sw $a2, 20($sp) |
| sw $a3, 24($sp) |
| sw $t0, 28($sp) |
| sw $t1, 32($sp) |
| sw $t2, 36($sp) |
| sw $t3, 40($sp) |
| sw $t4, 44($sp) |
| sw $t5, 48($sp) |
| sw $t6, 52($sp) |
| sw $t7, 56($sp) |
| sw $t8, 60($sp) |
| sw $t9, 64($sp) |
| sw $gp, 68($sp) |
| sw $ra, 72($sp) |
| |
| /* save the control registers */ |
| mfc0 $at, $12 /* status */ |
| sw $at, 76($sp) |
| mfc0 $at, $13 /* cause */ |
| sw $at, 80($sp) |
| mfc0 $at, $14 /* epc */ |
| sw $at, 84($sp) |
| |
| .set pop |
| .endm |
| |
| .macro iframe_restore |
| .set push |
| .set noat |
| |
| /* restore the temporary registers */ |
| lw $at, 0($sp) |
| lw $v0, 4($sp) |
| lw $v1, 8($sp) |
| lw $a0, 12($sp) |
| lw $a1, 16($sp) |
| lw $a2, 20($sp) |
| lw $a3, 24($sp) |
| lw $t0, 28($sp) |
| lw $t1, 32($sp) |
| lw $t2, 36($sp) |
| lw $t3, 40($sp) |
| lw $t4, 44($sp) |
| lw $t5, 48($sp) |
| lw $t6, 52($sp) |
| lw $t7, 56($sp) |
| lw $t8, 60($sp) |
| lw $t9, 64($sp) |
| lw $gp, 68($sp) |
| lw $ra, 72($sp) |
| |
| /* restore the control registers */ |
| lw $k0, 76($sp) |
| mtc0 $k0, $12 /* status */ |
| lw $k0, 80($sp) |
| mtc0 $k0, $13 /* cause */ |
| lw $k0, 84($sp) |
| mtc0 $k0, $14 /* epc */ |
| |
| addiu $sp, 88 |
| .set pop |
| .endm |
| |
| /* compatibility mode irq/syscall/general exception */ |
| .org 0x180 |
| _irq: |
| la $k0, mips_gen_exception |
| li $k1, 0 |
| b shared_irq_save_return |
| |
| /* vectored base */ |
| .macro vectored_irq, num |
| .org 0x200 + VECTORED_OFFSET_SHIFT * \num |
| _vectored_irq\num: |
| la $k0, mips_irq |
| li $k1, \num |
| b shared_irq_save_return |
| b . |
| .endm |
| |
| vectored_irq 0 |
| vectored_irq 1 |
| vectored_irq 2 |
| vectored_irq 3 |
| vectored_irq 4 |
| vectored_irq 5 |
| vectored_irq 6 |
| vectored_irq 7 |
| vectored_irq 8 |
| vectored_irq 9 |
| |
| /* branched to from above, k0 holds address to call, k1 holds arg to function */ |
| shared_irq_save_return: |
| iframe_save |
| |
| move $a0, $sp |
| move $a1, $k1 |
| jal $k0 |
| |
| iframe_restore |
| |
| eret |
| |