diff options
Diffstat (limited to 'arch/mips/dec/int-handler.S')
| -rw-r--r-- | arch/mips/dec/int-handler.S | 128 |
1 files changed, 61 insertions, 67 deletions
diff --git a/arch/mips/dec/int-handler.S b/arch/mips/dec/int-handler.S index 3b379099321..41a2fa1fa12 100644 --- a/arch/mips/dec/int-handler.S +++ b/arch/mips/dec/int-handler.S @@ -1,10 +1,8 @@ /* - * arch/mips/dec/int-handler.S - * * Copyright (C) 1995, 1996, 1997 Paul M. Antoine and Harald Koerfgen - * Copyright (C) 2000, 2001, 2002, 2003 Maciej W. Rozycki + * Copyright (C) 2000, 2001, 2002, 2003, 2005 Maciej W. Rozycki * - * Written by Ralf Baechle and Andreas Busse, modified for DECStation + * Written by Ralf Baechle and Andreas Busse, modified for DECstation * support by Paul Antoine and Harald Koerfgen. * * completly rewritten: @@ -13,12 +11,12 @@ * Rewritten extensively for controller-driven IRQ support * by Maciej W. Rozycki. */ -#include <linux/config.h> + +#include <asm/addrspace.h> #include <asm/asm.h> -#include <asm/regdef.h> #include <asm/mipsregs.h> +#include <asm/regdef.h> #include <asm/stackframe.h> -#include <asm/addrspace.h> #include <asm/dec/interrupts.h> #include <asm/dec/ioasic_addrs.h> @@ -28,11 +26,14 @@ #include <asm/dec/kn02xa.h> #include <asm/dec/kn03.h> +#define KN02_CSR_BASE CKSEG1ADDR(KN02_SLOT_BASE + KN02_CSR) +#define KN02XA_IOASIC_BASE CKSEG1ADDR(KN02XA_SLOT_BASE + IOASIC_IOCTL) +#define KN03_IOASIC_BASE CKSEG1ADDR(KN03_SLOT_BASE + IOASIC_IOCTL) .text .set noreorder /* - * decstation_handle_int: Interrupt handler for DECStations + * plat_irq_dispatch: Interrupt handler for DECstations * * We follow the model in the Indy interrupt code by David Miller, where he * says: a lot of complication here is taken away because: @@ -48,84 +49,80 @@ * 3) Linux only thinks in terms of all IRQs on or all IRQs * off, nothing in between like BSD spl() brain-damage. * - * Furthermore, the IRQs on the DECStations look basically (barring + * Furthermore, the IRQs on the DECstations look basically (barring * software IRQs which we don't use at all) like... * * DS2100/3100's, aka kn01, aka Pmax: * * MIPS IRQ Source - * -------- ------ - * 0 Software (ignored) - * 1 Software (ignored) - * 2 SCSI - * 3 Lance Ethernet - * 4 DZ11 serial - * 5 RTC - * 6 Memory Controller - * 7 FPU + * -------- ------ + * 0 Software (ignored) + * 1 Software (ignored) + * 2 SCSI + * 3 Lance Ethernet + * 4 DZ11 serial + * 5 RTC + * 6 Memory Controller & Video + * 7 FPU * * DS5000/200, aka kn02, aka 3max: * * MIPS IRQ Source - * -------- ------ - * 0 Software (ignored) - * 1 Software (ignored) - * 2 TurboChannel - * 3 RTC - * 4 Reserved - * 5 Memory Controller - * 6 Reserved - * 7 FPU + * -------- ------ + * 0 Software (ignored) + * 1 Software (ignored) + * 2 TurboChannel + * 3 RTC + * 4 Reserved + * 5 Memory Controller + * 6 Reserved + * 7 FPU * * DS5000/1xx's, aka kn02ba, aka 3min: * * MIPS IRQ Source - * -------- ------ - * 0 Software (ignored) - * 1 Software (ignored) - * 2 TurboChannel Slot 0 - * 3 TurboChannel Slot 1 - * 4 TurboChannel Slot 2 - * 5 TurboChannel Slot 3 (ASIC) - * 6 Halt button - * 7 FPU/R4k timer + * -------- ------ + * 0 Software (ignored) + * 1 Software (ignored) + * 2 TurboChannel Slot 0 + * 3 TurboChannel Slot 1 + * 4 TurboChannel Slot 2 + * 5 TurboChannel Slot 3 (ASIC) + * 6 Halt button + * 7 FPU/R4k timer * * DS5000/2x's, aka kn02ca, aka maxine: * * MIPS IRQ Source - * -------- ------ - * 0 Software (ignored) - * 1 Software (ignored) - * 2 Periodic Interrupt (100usec) - * 3 RTC - * 4 I/O write timeout - * 5 TurboChannel (ASIC) - * 6 Halt Keycode from Access.Bus keyboard (CTRL-ALT-ENTER) - * 7 FPU/R4k timer + * -------- ------ + * 0 Software (ignored) + * 1 Software (ignored) + * 2 Periodic Interrupt (100usec) + * 3 RTC + * 4 I/O write timeout + * 5 TurboChannel (ASIC) + * 6 Halt Keycode from Access.Bus keyboard (CTRL-ALT-ENTER) + * 7 FPU/R4k timer * * DS5000/2xx's, aka kn03, aka 3maxplus: * * MIPS IRQ Source - * -------- ------ - * 0 Software (ignored) - * 1 Software (ignored) - * 2 System Board (ASIC) - * 3 RTC - * 4 Reserved - * 5 Memory - * 6 Halt Button - * 7 FPU/R4k timer + * -------- ------ + * 0 Software (ignored) + * 1 Software (ignored) + * 2 System Board (ASIC) + * 3 RTC + * 4 Reserved + * 5 Memory + * 6 Halt Button + * 7 FPU/R4k timer * * We handle the IRQ according to _our_ priority (see setup.c), * then we just return. If multiple IRQs are pending then we will * just take another exception, big deal. */ .align 5 - NESTED(decstation_handle_int, PT_SIZE, ra) - .set noat - SAVE_ALL - CLI # TEST: interrupts should be off - .set at + NESTED(plat_irq_dispatch, PT_SIZE, ra) .set noreorder /* @@ -133,7 +130,7 @@ */ mfc0 t0,CP0_CAUSE # get pending interrupts mfc0 t1,CP0_STATUS -#ifdef CONFIG_MIPS32 +#ifdef CONFIG_32BIT lw t2,cpu_fpu_mask #endif andi t0,ST0_IM # CAUSE.CE may be non-zero! @@ -141,7 +138,7 @@ beqz t0,spurious -#ifdef CONFIG_MIPS32 +#ifdef CONFIG_32BIT and t2,t0 bnez t2,fpu # handle FPU immediately #endif @@ -265,13 +262,10 @@ srlv t3,t1,t2 handle_it: - jal do_IRQ - move a1,sp - - j ret_from_irq + j dec_irq_dispatch nop -#ifdef CONFIG_MIPS32 +#ifdef CONFIG_32BIT fpu: j handle_fpe_int nop @@ -280,7 +274,7 @@ fpu: spurious: j spurious_interrupt nop - END(decstation_handle_int) + END(plat_irq_dispatch) /* * Generic unimplemented interrupt routines -- cpu_mask_nr_tbl |