diff options
Diffstat (limited to 'arch/mips/gt64120/ev64120/int-handler.S')
| -rw-r--r-- | arch/mips/gt64120/ev64120/int-handler.S | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/arch/mips/gt64120/ev64120/int-handler.S b/arch/mips/gt64120/ev64120/int-handler.S new file mode 100644 index 00000000000..752435faf2d --- /dev/null +++ b/arch/mips/gt64120/ev64120/int-handler.S @@ -0,0 +1,113 @@ +/* + * int-handler.S + * + * Based on the cobalt handler. + */ +#include <asm/asm.h> +#include <asm/mipsregs.h> +#include <asm/addrspace.h> +#include <asm/regdef.h> +#include <asm/stackframe.h> + +/* + * galileo_handle_int - + * We check for the timer first, then check PCI ints A and D. + * Then check for serial IRQ and fall through. + */ + .align 5 + .set reorder + .set noat + NESTED(galileo_handle_int, PT_SIZE, sp) + SAVE_ALL + CLI + .set at + mfc0 t0,CP0_CAUSE + mfc0 t2,CP0_STATUS + + and t0,t2 + + andi t1,t0,STATUSF_IP4 /* int2 hardware line (timer) */ + bnez t1,ll_gt64120_irq + andi t1,t0,STATUSF_IP2 /* int0 hardware line */ + bnez t1,ll_pci_intA + andi t1,t0,STATUSF_IP5 /* int3 hardware line */ + bnez t1,ll_pci_intD + andi t1,t0,STATUSF_IP6 /* int4 hardware line */ + bnez t1,ll_serial_irq + andi t1,t0,STATUSF_IP7 /* compare int */ + bnez t1,ll_compare_irq + nop + + /* wrong alarm or masked ... */ + j spurious_interrupt + nop + END(galileo_handle_int) + + + .align 5 + .set reorder +ll_gt64120_irq: + li a0,4 + move a1,sp + jal do_IRQ + nop + j ret_from_irq + nop + + .align 5 + .set reorder +ll_compare_irq: + li a0,7 + move a1,sp + jal do_IRQ + nop + j ret_from_irq + nop + + .align 5 + .set reorder +ll_pci_intA: + move a0,sp + jal pci_intA + nop + j ret_from_irq + nop + +#if 0 + .align 5 + .set reorder +ll_pci_intB: + move a0,sp + jal pci_intB + nop + j ret_from_irq + nop + + .align 5 + .set reorder +ll_pci_intC: + move a0,sp + jal pci_intC + nop + j ret_from_irq + nop +#endif + + .align 5 + .set reorder +ll_pci_intD: + move a0,sp + jal pci_intD + nop + j ret_from_irq + nop + + .align 5 + .set reorder +ll_serial_irq: + li a0,6 + move a1,sp + jal do_IRQ + nop + j ret_from_irq + nop |