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author | Felix Fietkau <nbd@openwrt.org> | 2007-05-04 22:13:42 +0000 |
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committer | Felix Fietkau <nbd@openwrt.org> | 2007-05-04 22:13:42 +0000 |
commit | 833bb8f485c66b226387a4c1416ae4b171cccef9 (patch) | |
tree | d86fcca8f8dd54c88c107d5f8f5ff5b29bb17dd2 /target/linux/brcm-2.4/files/arch/mips/bcm947xx/generic | |
parent | 7d3baf4131083226f877c1f571f1ae0cb025c018 (diff) | |
download | upstream-833bb8f485c66b226387a4c1416ae4b171cccef9.tar.gz upstream-833bb8f485c66b226387a4c1416ae4b171cccef9.tar.bz2 upstream-833bb8f485c66b226387a4c1416ae4b171cccef9.zip |
convert brcm-2.4 to the new target structure
SVN-Revision: 7092
Diffstat (limited to 'target/linux/brcm-2.4/files/arch/mips/bcm947xx/generic')
3 files changed, 193 insertions, 0 deletions
diff --git a/target/linux/brcm-2.4/files/arch/mips/bcm947xx/generic/Makefile b/target/linux/brcm-2.4/files/arch/mips/bcm947xx/generic/Makefile new file mode 100644 index 0000000000..7e03a34980 --- /dev/null +++ b/target/linux/brcm-2.4/files/arch/mips/bcm947xx/generic/Makefile @@ -0,0 +1,12 @@ +# +# Makefile for the BCM947xx specific kernel interface routines +# under Linux. +# +EXTRA_CFLAGS += -fno-delayed-branch +USE_STANDARD_AS_RULE := true + +O_TARGET := brcm.o + +obj-y := int-handler.o irq.o + +include $(TOPDIR)/Rules.make diff --git a/target/linux/brcm-2.4/files/arch/mips/bcm947xx/generic/int-handler.S b/target/linux/brcm-2.4/files/arch/mips/bcm947xx/generic/int-handler.S new file mode 100644 index 0000000000..cdb45c3e16 --- /dev/null +++ b/target/linux/brcm-2.4/files/arch/mips/bcm947xx/generic/int-handler.S @@ -0,0 +1,51 @@ +/* + * Generic interrupt handler for Broadcom MIPS boards + * + * Copyright 2004, Broadcom Corporation + * All Rights Reserved. + * + * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY + * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM + * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS + * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE. + * + * $Id: int-handler.S,v 1.1 2005/03/16 13:50:00 wbx Exp $ + */ + +#include <linux/config.h> + +#include <asm/asm.h> +#include <asm/mipsregs.h> +#include <asm/regdef.h> +#include <asm/stackframe.h> + +/* + * MIPS IRQ Source + * -------- ------ + * 0 Software (ignored) + * 1 Software (ignored) + * 2 Combined hardware interrupt (hw0) + * 3 Hardware + * 4 Hardware + * 5 Hardware + * 6 Hardware + * 7 R4k timer + */ + + .text + .set noreorder + .set noat + .align 5 + NESTED(brcmIRQ, PT_SIZE, sp) + SAVE_ALL + CLI + .set at + .set noreorder + + jal brcm_irq_dispatch + move a0, sp + + j ret_from_irq + nop + + END(brcmIRQ) diff --git a/target/linux/brcm-2.4/files/arch/mips/bcm947xx/generic/irq.c b/target/linux/brcm-2.4/files/arch/mips/bcm947xx/generic/irq.c new file mode 100644 index 0000000000..698598b0d1 --- /dev/null +++ b/target/linux/brcm-2.4/files/arch/mips/bcm947xx/generic/irq.c @@ -0,0 +1,130 @@ +/* + * Generic interrupt control functions for Broadcom MIPS boards + * + * Copyright 2004, Broadcom Corporation + * All Rights Reserved. + * + * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY + * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM + * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS + * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE. + * + * $Id: irq.c,v 1.1 2005/03/16 13:50:00 wbx Exp $ + */ + +#include <linux/config.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/irq.h> + +#include <asm/irq.h> +#include <asm/mipsregs.h> +#include <asm/gdb-stub.h> + +#define ALLINTS (IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3 | IE_IRQ4 | IE_IRQ5) + +extern asmlinkage void brcmIRQ(void); +extern asmlinkage unsigned int do_IRQ(int irq, struct pt_regs *regs); + +void +brcm_irq_dispatch(struct pt_regs *regs) +{ + u32 cause; + + cause = read_c0_cause() & + read_c0_status() & + CAUSEF_IP; + +#ifdef CONFIG_KERNPROF + change_c0_status(cause | 1, 1); +#else + clear_c0_status(cause); +#endif + + if (cause & CAUSEF_IP7) + do_IRQ(7, regs); + if (cause & CAUSEF_IP2) + do_IRQ(2, regs); + if (cause & CAUSEF_IP3) + do_IRQ(3, regs); + if (cause & CAUSEF_IP4) + do_IRQ(4, regs); + if (cause & CAUSEF_IP5) + do_IRQ(5, regs); + if (cause & CAUSEF_IP6) + do_IRQ(6, regs); +} + +static void +enable_brcm_irq(unsigned int irq) +{ + if (irq < 8) + set_c0_status(1 << (irq + 8)); + else + set_c0_status(IE_IRQ0); +} + +static void +disable_brcm_irq(unsigned int irq) +{ + if (irq < 8) + clear_c0_status(1 << (irq + 8)); + else + clear_c0_status(IE_IRQ0); +} + +static void +ack_brcm_irq(unsigned int irq) +{ + /* Already done in brcm_irq_dispatch */ +} + +static unsigned int +startup_brcm_irq(unsigned int irq) +{ + enable_brcm_irq(irq); + + return 0; /* never anything pending */ +} + +static void +end_brcm_irq(unsigned int irq) +{ + if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))) + enable_brcm_irq(irq); +} + +static struct hw_interrupt_type brcm_irq_type = { + typename: "MIPS", + startup: startup_brcm_irq, + shutdown: disable_brcm_irq, + enable: enable_brcm_irq, + disable: disable_brcm_irq, + ack: ack_brcm_irq, + end: end_brcm_irq, + NULL +}; + +void __init +init_IRQ(void) +{ + int i; + + for (i = 0; i < NR_IRQS; i++) { + irq_desc[i].status = IRQ_DISABLED; + irq_desc[i].action = 0; + irq_desc[i].depth = 1; + irq_desc[i].handler = &brcm_irq_type; + } + + set_except_vector(0, brcmIRQ); + change_c0_status(ST0_IM, ALLINTS); + +#ifdef CONFIG_REMOTE_DEBUG + printk("Breaking into debugger...\n"); + set_debug_traps(); + breakpoint(); +#endif +} |