diff options
Diffstat (limited to 'arch/mips/galileo-boards/ev96100/int-handler.S')
| -rw-r--r-- | arch/mips/galileo-boards/ev96100/int-handler.S | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/mips/galileo-boards/ev96100/int-handler.S b/arch/mips/galileo-boards/ev96100/int-handler.S new file mode 100644 index 000000000..19bf163d1 --- /dev/null +++ b/arch/mips/galileo-boards/ev96100/int-handler.S @@ -0,0 +1,56 @@ +#include <asm/asm.h> +#include <asm/mipsregs.h> +#include <asm/regdef.h> +#include <asm/stackframe.h> + + .text + .set mips1 + .set macro + .set noat + .align 5 + +NESTED(ev96100IRQ, 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 + + # FIX ME add R7000 extensions + andi t0,0xff00 # isolate pending bits + andi a0, t0, CAUSEF_IP7 + beq a0, zero, 1f + move a0, sp # delay slot + jal mips_timer_interrupt + j ret_from_irq + nop + + +1: + beqz t0, 3f # spurious interrupt + move a0,t0 + move a1,sp # delay slot + jal do_IRQ + + 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 + +3: j spurious_interrupt + +/* dbg: .asciz "\nev96100IRQ" */ +END(ev96100IRQ) + |