diff options
Diffstat (limited to 'arch/mips/momentum/ocelot_3/int-handler.S')
| -rw-r--r-- | arch/mips/momentum/ocelot_3/int-handler.S | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/arch/mips/momentum/ocelot_3/int-handler.S b/arch/mips/momentum/ocelot_3/int-handler.S new file mode 100644 index 00000000000..4522f09ed76 --- /dev/null +++ b/arch/mips/momentum/ocelot_3/int-handler.S @@ -0,0 +1,137 @@ +/* + * Copyright 2002 Momentum Computer Inc. + * Author: Matthew Dharm <mdharm@momenco.com> + * + * Copyright 2001 MontaVista Software Inc. + * Author: jsun@mvista.com or jsun@junsun.net + * + * Copyright 2004 PMC-Sierra + * Author: Manish Lachwani (lachwani@pmc-sierra.com) + * + * Copyright (C) 2004 MontaVista Software Inc. + * Author: Manish Lachwani, mlachwani@mvista.com + * + * First-level interrupt dispatcher for Ocelot-3 board. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ +#include <asm/asm.h> +#include <asm/mipsregs.h> +#include <asm/addrspace.h> +#include <asm/regdef.h> +#include <asm/stackframe.h> + +/* + * First level interrupt dispatcher for Ocelot-3 board + */ + .align 5 + NESTED(ocelot3_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_IP0 /* sw0 software interrupt (IRQ0) */ + bnez t1, ll_sw0_irq + + andi t1, t0, STATUSF_IP1 /* sw1 software interrupt (IRQ1) */ + bnez t1, ll_sw1_irq + + andi t1, t0, STATUSF_IP2 /* int0 hardware line (IRQ2) */ + bnez t1, ll_pci0slot1_irq + + andi t1, t0, STATUSF_IP3 /* int1 hardware line (IRQ3) */ + bnez t1, ll_pci0slot2_irq + + andi t1, t0, STATUSF_IP4 /* int2 hardware line (IRQ4) */ + bnez t1, ll_pci1slot1_irq + + andi t1, t0, STATUSF_IP5 /* int3 hardware line (IRQ5) */ + bnez t1, ll_pci1slot2_irq + + andi t1, t0, STATUSF_IP6 /* int4 hardware line (IRQ6) */ + bnez t1, ll_uart_irq + + andi t1, t0, STATUSF_IP7 /* cpu timer (IRQ7) */ + bnez t1, ll_cputimer_irq + + /* now look at extended interrupts */ + mfc0 t0, CP0_CAUSE + cfc0 t1, CP0_S1_INTCONTROL + + /* shift the mask 8 bits left to line up the bits */ + sll t2, t1, 8 + + and t0, t2 + srl t0, t0, 16 + + andi t1, t0, STATUSF_IP8 /* int6 hardware line (IRQ9) */ + bnez t1, ll_mv64340_decode_irq + + .set reorder + + /* wrong alarm or masked ... */ + j spurious_interrupt + nop + END(ocelot3_handle_int) + + .align 5 +ll_sw0_irq: + li a0, 0 /* IRQ 1 */ + move a1, sp + jal do_IRQ + j ret_from_irq +ll_sw1_irq: + li a0, 1 /* IRQ 2 */ + move a1, sp + jal do_IRQ + j ret_from_irq + +ll_pci0slot1_irq: + li a0, 2 /* IRQ 3 */ + move a1, sp + jal do_IRQ + j ret_from_irq + +ll_pci0slot2_irq: + li a0, 3 /* IRQ 4 */ + move a1, sp + jal do_IRQ + j ret_from_irq + +ll_pci1slot1_irq: + li a0, 4 /* IRQ 5 */ + move a1, sp + jal do_IRQ + j ret_from_irq + +ll_pci1slot2_irq: + li a0, 5 /* IRQ 6 */ + move a1, sp + jal do_IRQ + j ret_from_irq + +ll_uart_irq: + li a0, 6 /* IRQ 7 */ + move a1, sp + jal do_IRQ + j ret_from_irq + +ll_cputimer_irq: + li a0, 7 /* IRQ 8 */ + move a1, sp + jal do_IRQ + j ret_from_irq + +ll_mv64340_decode_irq: + move a0, sp + jal ll_mv64340_irq + j ret_from_irq + |