diff options
Diffstat (limited to 'arch/mips/ddb5xxx/ddb5477/irq.c')
| -rw-r--r-- | arch/mips/ddb5xxx/ddb5477/irq.c | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/arch/mips/ddb5xxx/ddb5477/irq.c b/arch/mips/ddb5xxx/ddb5477/irq.c deleted file mode 100644 index faa4a506bf82..000000000000 --- a/arch/mips/ddb5xxx/ddb5477/irq.c +++ /dev/null @@ -1,209 +0,0 @@ -/* - * Copyright 2001 MontaVista Software Inc. - * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net - * - * arch/mips/ddb5xxx/ddb5477/irq.c - * The irq setup and misc routines for DDB5476. - * - * 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 <linux/init.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/types.h> -#include <linux/ptrace.h> - -#include <asm/i8259.h> -#include <asm/irq_cpu.h> -#include <asm/system.h> -#include <asm/mipsregs.h> -#include <asm/debug.h> -#include <asm/addrspace.h> -#include <asm/bootinfo.h> - -#include <asm/ddb5xxx/ddb5xxx.h> - - -/* - * IRQ mapping - * - * 0-7: 8 CPU interrupts - * 0 - software interrupt 0 - * 1 - software interrupt 1 - * 2 - most Vrc5477 interrupts are routed to this pin - * 3 - (optional) some other interrupts routed to this pin for debugg - * 4 - not used - * 5 - not used - * 6 - not used - * 7 - cpu timer (used by default) - * - * 8-39: 32 Vrc5477 interrupt sources - * (refer to the Vrc5477 manual) - */ - -#define PCI0 DDB_INTPPES0 -#define PCI1 DDB_INTPPES1 - -#define ACTIVE_LOW 1 -#define ACTIVE_HIGH 0 - -#define LEVEL_SENSE 2 -#define EDGE_TRIGGER 0 - -#define INTA 0 -#define INTB 1 -#define INTC 2 -#define INTD 3 -#define INTE 4 - -static inline void -set_pci_int_attr(u32 pci, u32 intn, u32 active, u32 trigger) -{ - u32 reg_value; - u32 reg_bitmask; - - reg_value = ddb_in32(pci); - reg_bitmask = 0x3 << (intn * 2); - - reg_value &= ~reg_bitmask; - reg_value |= (active | trigger) << (intn * 2); - ddb_out32(pci, reg_value); -} - -extern void vrc5477_irq_init(u32 base); -static struct irqaction irq_cascade = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL }; - -void __init arch_init_irq(void) -{ - /* by default, we disable all interrupts and route all vrc5477 - * interrupts to pin 0 (irq 2) */ - ddb_out32(DDB_INTCTRL0, 0); - ddb_out32(DDB_INTCTRL1, 0); - ddb_out32(DDB_INTCTRL2, 0); - ddb_out32(DDB_INTCTRL3, 0); - - clear_c0_status(0xff00); - set_c0_status(0x0400); - - /* setup PCI interrupt attributes */ - set_pci_int_attr(PCI0, INTA, ACTIVE_LOW, LEVEL_SENSE); - set_pci_int_attr(PCI0, INTB, ACTIVE_LOW, LEVEL_SENSE); - if (mips_machtype == MACH_NEC_ROCKHOPPERII) - set_pci_int_attr(PCI0, INTC, ACTIVE_HIGH, LEVEL_SENSE); - else - set_pci_int_attr(PCI0, INTC, ACTIVE_LOW, LEVEL_SENSE); - set_pci_int_attr(PCI0, INTD, ACTIVE_LOW, LEVEL_SENSE); - set_pci_int_attr(PCI0, INTE, ACTIVE_LOW, LEVEL_SENSE); - - set_pci_int_attr(PCI1, INTA, ACTIVE_LOW, LEVEL_SENSE); - set_pci_int_attr(PCI1, INTB, ACTIVE_LOW, LEVEL_SENSE); - set_pci_int_attr(PCI1, INTC, ACTIVE_LOW, LEVEL_SENSE); - set_pci_int_attr(PCI1, INTD, ACTIVE_LOW, LEVEL_SENSE); - set_pci_int_attr(PCI1, INTE, ACTIVE_LOW, LEVEL_SENSE); - - /* - * for debugging purpose, we enable several error interrupts - * and route them to pin 1. (IP3) - */ - /* cpu parity check - 0 */ - ll_vrc5477_irq_route(0, 1); ll_vrc5477_irq_enable(0); - /* cpu no-target decode - 1 */ - ll_vrc5477_irq_route(1, 1); ll_vrc5477_irq_enable(1); - /* local bus read time-out - 7 */ - ll_vrc5477_irq_route(7, 1); ll_vrc5477_irq_enable(7); - /* PCI SERR# - 14 */ - ll_vrc5477_irq_route(14, 1); ll_vrc5477_irq_enable(14); - /* PCI internal error - 15 */ - ll_vrc5477_irq_route(15, 1); ll_vrc5477_irq_enable(15); - /* IOPCI SERR# - 30 */ - ll_vrc5477_irq_route(30, 1); ll_vrc5477_irq_enable(30); - /* IOPCI internal error - 31 */ - ll_vrc5477_irq_route(31, 1); ll_vrc5477_irq_enable(31); - - /* init all controllers */ - init_i8259_irqs(); - mips_cpu_irq_init(); - vrc5477_irq_init(VRC5477_IRQ_BASE); - - - /* setup cascade interrupts */ - setup_irq(VRC5477_IRQ_BASE + VRC5477_I8259_CASCADE, &irq_cascade); - setup_irq(CPU_IRQ_BASE + CPU_VRC5477_CASCADE, &irq_cascade); -} - -u8 i8259_interrupt_ack(void) -{ - u8 irq; - u32 reg; - - /* Set window 0 for interrupt acknowledge */ - reg = ddb_in32(DDB_PCIINIT10); - - ddb_set_pmr(DDB_PCIINIT10, DDB_PCICMD_IACK, 0, DDB_PCI_ACCESS_32); - irq = *(volatile u8 *) KSEG1ADDR(DDB_PCI_IACK_BASE); - ddb_out32(DDB_PCIINIT10, reg); - - return irq; -} -/* - * the first level int-handler will jump here if it is a vrc5477 irq - */ -#define NUM_5477_IRQS 32 -static void vrc5477_irq_dispatch(void) -{ - u32 intStatus; - u32 bitmask; - u32 i; - - db_assert(ddb_in32(DDB_INT2STAT) == 0); - db_assert(ddb_in32(DDB_INT3STAT) == 0); - db_assert(ddb_in32(DDB_INT4STAT) == 0); - db_assert(ddb_in32(DDB_NMISTAT) == 0); - - if (ddb_in32(DDB_INT1STAT) != 0) { -#if defined(CONFIG_RUNTIME_DEBUG) - vrc5477_show_int_regs(); -#endif - panic("error interrupt has happened."); - } - - intStatus = ddb_in32(DDB_INT0STAT); - - if (mips_machtype == MACH_NEC_ROCKHOPPERII) { - /* check for i8259 interrupts */ - if (intStatus & (1 << VRC5477_I8259_CASCADE)) { - int i8259_irq = i8259_interrupt_ack(); - do_IRQ(i8259_irq); - return; - } - } - - for (i=0, bitmask=1; i<= NUM_5477_IRQS; bitmask <<=1, i++) { - /* do we need to "and" with the int mask? */ - if (intStatus & bitmask) { - do_IRQ(VRC5477_IRQ_BASE + i); - return; - } - } -} - -#define VR5477INTS (STATUSF_IP2|STATUSF_IP3|STATUSF_IP4|STATUSF_IP5|STATUSF_IP6) - -asmlinkage void plat_irq_dispatch(void) -{ - unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM; - - if (pending & STATUSF_IP7) - do_IRQ(CPU_IRQ_BASE + 7); - else if (pending & VR5477INTS) - vrc5477_irq_dispatch(); - else if (pending & STATUSF_IP0) - do_IRQ(CPU_IRQ_BASE); - else if (pending & STATUSF_IP1) - do_IRQ(CPU_IRQ_BASE + 1); - else - spurious_interrupt(); -} |