diff options
Diffstat (limited to 'arch/mips/ite-boards/generic/int-handler.S')
| -rw-r--r-- | arch/mips/ite-boards/generic/int-handler.S | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/arch/mips/ite-boards/generic/int-handler.S b/arch/mips/ite-boards/generic/int-handler.S new file mode 100644 index 00000000000..d190d8add9c --- /dev/null +++ b/arch/mips/ite-boards/generic/int-handler.S @@ -0,0 +1,63 @@ +#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) + |