diff options
Diffstat (limited to 'arch/mips/cobalt/irq.c')
| -rw-r--r-- | arch/mips/cobalt/irq.c | 118 |
1 files changed, 31 insertions, 87 deletions
diff --git a/arch/mips/cobalt/irq.c b/arch/mips/cobalt/irq.c index 48763cd10eaa..ac4fb912649d 100644 --- a/arch/mips/cobalt/irq.c +++ b/arch/mips/cobalt/irq.c @@ -15,104 +15,48 @@ #include <asm/i8259.h> #include <asm/irq_cpu.h> +#include <asm/irq_gt641xx.h> #include <asm/gt64120.h> -#include <cobalt.h> - -/* - * We have two types of interrupts that we handle, ones that come in through - * the CPU interrupt lines, and ones that come in on the via chip. The CPU - * mappings are: - * - * 16 - Software interrupt 0 (unused) IE_SW0 - * 17 - Software interrupt 1 (unused) IE_SW1 - * 18 - Galileo chip (timer) IE_IRQ0 - * 19 - Tulip 0 + NCR SCSI IE_IRQ1 - * 20 - Tulip 1 IE_IRQ2 - * 21 - 16550 UART IE_IRQ3 - * 22 - VIA southbridge PIC IE_IRQ4 - * 23 - unused IE_IRQ5 - * - * The VIA chip is a master/slave 8259 setup and has the following interrupts: - * - * 8 - RTC - * 9 - PCI - * 14 - IDE0 - * 15 - IDE1 - */ - -static inline void galileo_irq(void) -{ - unsigned int mask, pending, devfn; - - mask = GT_READ(GT_INTRMASK_OFS); - pending = GT_READ(GT_INTRCAUSE_OFS) & mask; - - if (pending & GT_INTR_T0EXP_MSK) { - GT_WRITE(GT_INTRCAUSE_OFS, ~GT_INTR_T0EXP_MSK); - do_IRQ(COBALT_GALILEO_IRQ); - } else if (pending & GT_INTR_RETRYCTR0_MSK) { - devfn = GT_READ(GT_PCI0_CFGADDR_OFS) >> 8; - GT_WRITE(GT_INTRCAUSE_OFS, ~GT_INTR_RETRYCTR0_MSK); - printk(KERN_WARNING - "Galileo: PCI retry count exceeded (%02x.%u)\n", - PCI_SLOT(devfn), PCI_FUNC(devfn)); - } else { - GT_WRITE(GT_INTRMASK_OFS, mask & ~pending); - printk(KERN_WARNING - "Galileo: masking unexpected interrupt %08x\n", pending); - } -} - -static inline void via_pic_irq(void) -{ - int irq; - - irq = i8259_irq(); - if (irq >= 0) - do_IRQ(irq); -} +#include <irq.h> asmlinkage void plat_irq_dispatch(void) { - unsigned pending = read_c0_status() & read_c0_cause(); + unsigned pending = read_c0_status() & read_c0_cause() & ST0_IM; + int irq; - if (pending & CAUSEF_IP2) /* COBALT_GALILEO_IRQ (18) */ - galileo_irq(); - else if (pending & CAUSEF_IP6) /* COBALT_VIA_IRQ (22) */ - via_pic_irq(); - else if (pending & CAUSEF_IP3) /* COBALT_ETH0_IRQ (19) */ - do_IRQ(COBALT_CPU_IRQ + 3); - else if (pending & CAUSEF_IP4) /* COBALT_ETH1_IRQ (20) */ - do_IRQ(COBALT_CPU_IRQ + 4); - else if (pending & CAUSEF_IP5) /* COBALT_SERIAL_IRQ (21) */ - do_IRQ(COBALT_CPU_IRQ + 5); - else if (pending & CAUSEF_IP7) /* IRQ 23 */ - do_IRQ(COBALT_CPU_IRQ + 7); + if (pending & CAUSEF_IP2) + gt641xx_irq_dispatch(); + else if (pending & CAUSEF_IP6) { + irq = i8259_irq(); + if (irq < 0) + spurious_interrupt(); + else + do_IRQ(irq); + } else if (pending & CAUSEF_IP3) + do_IRQ(MIPS_CPU_IRQ_BASE + 3); + else if (pending & CAUSEF_IP4) + do_IRQ(MIPS_CPU_IRQ_BASE + 4); + else if (pending & CAUSEF_IP5) + do_IRQ(MIPS_CPU_IRQ_BASE + 5); + else if (pending & CAUSEF_IP7) + do_IRQ(MIPS_CPU_IRQ_BASE + 7); + else + spurious_interrupt(); } -static struct irqaction irq_via = { - .handler = no_action, - .mask = CPU_MASK_NONE, - .name = "cascade" +static struct irqaction cascade = { + .handler = no_action, + .mask = CPU_MASK_NONE, + .name = "cascade", }; void __init arch_init_irq(void) { - /* - * Mask all Galileo interrupts. The Galileo - * handler is set in cobalt_timer_setup() - */ - GT_WRITE(GT_INTRMASK_OFS, 0); - - init_i8259_irqs(); /* 0 ... 15 */ - mips_cpu_irq_init(); /* 16 ... 23 */ - - /* - * Mask all cpu interrupts - * (except IE4, we already masked those at VIA level) - */ - change_c0_status(ST0_IM, IE_IRQ4); + mips_cpu_irq_init(); + gt641xx_irq_init(); + init_i8259_irqs(); - setup_irq(COBALT_VIA_IRQ, &irq_via); + setup_irq(GT641XX_CASCADE_IRQ, &cascade); + setup_irq(I8259_CASCADE_IRQ, &cascade); } |