From e4ac58afdfac792c0583af30dbd9eae53e24c78b Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Mon, 3 Apr 2006 17:56:36 +0100 Subject: [MIPS] Rewrite all the assembler interrupt handlers to C. Saves like 1,600 lines of code, is way easier to debug, compilers frequently do a better job than the cut and paste type of handlers many boards had. And finally having all the stuff done in a single place also means alot of bug potencial for the MT ASE is gone. The only surviving handler in assembler is the DECstation one; I hope Maciej will rewrite it. Signed-off-by: Ralf Baechle --- arch/mips/au1000/common/Makefile | 2 +- arch/mips/au1000/common/int-handler.S | 69 ----------------------------------- arch/mips/au1000/common/irq.c | 20 +++++++++- 3 files changed, 19 insertions(+), 72 deletions(-) delete mode 100644 arch/mips/au1000/common/int-handler.S (limited to 'arch/mips/au1000') diff --git a/arch/mips/au1000/common/Makefile b/arch/mips/au1000/common/Makefile index a1edfd1f643..bf682f50b85 100644 --- a/arch/mips/au1000/common/Makefile +++ b/arch/mips/au1000/common/Makefile @@ -6,7 +6,7 @@ # Makefile for the Alchemy Au1000 CPU, generic files. # -obj-y += prom.o int-handler.o irq.o puts.o time.o reset.o \ +obj-y += prom.o irq.o puts.o time.o reset.o \ au1xxx_irqmap.o clocks.o platform.o power.o setup.o \ sleeper.o cputable.o dma.o dbdma.o gpio.o diff --git a/arch/mips/au1000/common/int-handler.S b/arch/mips/au1000/common/int-handler.S deleted file mode 100644 index 65baa8a8c52..00000000000 --- a/arch/mips/au1000/common/int-handler.S +++ /dev/null @@ -1,69 +0,0 @@ -/* - * Copyright 2001 MontaVista Software Inc. - * Author: ppopov@mvista.com - * - * Interrupt dispatcher for Au1000 boards. - * - * 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 -#include -#include -#include -#include - - .text - .set macro - .set noat - .align 5 - -NESTED(au1000_IRQ, PT_SIZE, sp) - SAVE_ALL - CLI # Important: mark KERNEL mode ! - - mfc0 t0,CP0_CAUSE # get pending interrupts - mfc0 t1,CP0_STATUS # get enabled interrupts - and t0,t1 # isolate allowed ones - - andi t0,0xff00 # isolate pending bits - beqz t0, 3f # spurious interrupt - - andi a0, t0, CAUSEF_IP7 - beq a0, zero, 1f - move a0, sp - jal mips_timer_interrupt - j ret_from_irq - -1: - andi a0, t0, CAUSEF_IP2 # Interrupt Controller 0, Request 0 - beq a0, zero, 2f - move a0,sp - jal intc0_req0_irqdispatch - j ret_from_irq -2: - andi a0, t0, CAUSEF_IP3 # Interrupt Controller 0, Request 1 - beq a0, zero, 3f - move a0,sp - jal intc0_req1_irqdispatch - j ret_from_irq -3: - andi a0, t0, CAUSEF_IP4 # Interrupt Controller 1, Request 0 - beq a0, zero, 4f - move a0,sp - jal intc1_req0_irqdispatch - j ret_from_irq -4: - andi a0, t0, CAUSEF_IP5 # Interrupt Controller 1, Request 1 - beq a0, zero, 5f - move a0, sp - jal intc1_req1_irqdispatch - j ret_from_irq - -5: - move a0, sp - jal spurious_interrupt - j ret_from_irq -END(au1000_IRQ) diff --git a/arch/mips/au1000/common/irq.c b/arch/mips/au1000/common/irq.c index 1339a0979f6..da61de77615 100644 --- a/arch/mips/au1000/common/irq.c +++ b/arch/mips/au1000/common/irq.c @@ -66,7 +66,6 @@ #define EXT_INTC1_REQ1 5 /* IP 5 */ #define MIPS_TIMER_IP 7 /* IP 7 */ -extern asmlinkage void au1000_IRQ(void); extern void set_debug_traps(void); extern irq_cpustat_t irq_stat [NR_CPUS]; @@ -446,7 +445,6 @@ void __init arch_init_irq(void) extern int au1xxx_ic0_nr_irqs; cp0_status = read_c0_status(); - set_except_vector(0, au1000_IRQ); /* Initialize interrupt controllers to a safe state. */ @@ -661,3 +659,21 @@ restore_au1xxx_intctl(void) au_writel(sleep_intctl_mask[0], IC0_MASKSET); au_sync(); } #endif /* CONFIG_PM */ + +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM; + + if (pending & CAUSEF_IP7) + mips_timer_interrupt(regs); + else if (pending & CAUSEF_IP2) + intc0_req0_irqdispatch(regs); + else if (pending & CAUSEF_IP3) + intc0_req1_irqdispatch(regs); + else if (pending & CAUSEF_IP4) + intc1_req0_irqdispatch(regs); + else if (pending & CAUSEF_IP5) + intc1_req1_irqdispatch(regs); + else + spurious_interrupt(regs); +} -- cgit v1.2.3