| #include <asm/asm.h> |
| #include <asm/mipsregs.h> |
| #include <asm/regdef.h> |
| #include <asm/stackframe.h> |
| |
| .text |
| .set macro |
| .set noat |
| .align 5 |
| |
| NESTED(it8172_IRQ, PT_SIZE, sp) |
| SAVE_ALL |
| CLI # Important: mark KERNEL mode ! |
| |
| /* We're working with 'reorder' set at this point. */ |
| /* |
| * Get pending interrupts |
| */ |
| |
| mfc0 t0,CP0_CAUSE # get pending interrupts |
| mfc0 t1,CP0_STATUS # get enabled interrupts |
| and t0,t1 # isolate allowed ones |
| |
| andi t0,0xff00 # isolate pending bits |
| beqz t0, 3f # spurious interrupt |
| |
| andi a0, t0, CAUSEF_IP7 |
| beq a0, zero, 1f |
| |
| li a0, 127 # MIPS_CPU_TIMER_IRQ = (NR_IRQS-1) |
| move a1, sp |
| jal ll_timer_interrupt |
| j ret_from_irq |
| nop |
| |
| 1: |
| andi a0, t0, CAUSEF_IP2 # the only int we expect at this time |
| beq a0, zero, 3f |
| move a0,sp |
| jal it8172_hw0_irqdispatch |
| |
| mfc0 t0,CP0_STATUS # disable interrupts |
| ori t0,1 |
| xori t0,1 |
| mtc0 t0,CP0_STATUS |
| nop |
| nop |
| nop |
| |
| la a1, ret_from_irq |
| jr a1 |
| nop |
| |
| 3: |
| move a0, sp |
| jal mips_spurious_interrupt |
| nop |
| la a1, ret_from_irq |
| jr a1 |
| nop |
| |
| END(it8172_IRQ) |
| |
