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- /*
- * 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
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