diff options
Diffstat (limited to 'target/linux/ifxmips/files-2.6.33/arch/mips/ifxmips/ar9/irq.c')
| -rw-r--r-- | target/linux/ifxmips/files-2.6.33/arch/mips/ifxmips/ar9/irq.c | 233 |
1 files changed, 0 insertions, 233 deletions
diff --git a/target/linux/ifxmips/files-2.6.33/arch/mips/ifxmips/ar9/irq.c b/target/linux/ifxmips/files-2.6.33/arch/mips/ifxmips/ar9/irq.c deleted file mode 100644 index 18b8d01..0000000 --- a/target/linux/ifxmips/files-2.6.33/arch/mips/ifxmips/ar9/irq.c +++ /dev/null @@ -1,233 +0,0 @@ -#include <linux/init.h> -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/kernel_stat.h> -#include <linux/module.h> - -#include <asm/bootinfo.h> -#include <asm/irq.h> -#include <asm/irq_cpu.h> - -#include <ifxmips.h> -#include <ifxmips_irq.h> - -void -ifxmips_disable_irq(unsigned int irq_nr) -{ - int i; - u32 *ier = IFXMIPS_ICU_IM0_IER; - - irq_nr -= INT_NUM_IRQ0; - for (i = 0; i <= 4; i++) - { - if (irq_nr < INT_NUM_IM_OFFSET) - { - ifxmips_w32(ifxmips_r32(ier) & ~(1 << irq_nr), ier); - return; - } - ier += IFXMIPS_ICU_OFFSET; - irq_nr -= INT_NUM_IM_OFFSET; - } -} -EXPORT_SYMBOL(ifxmips_disable_irq); - -void -ifxmips_mask_and_ack_irq(unsigned int irq_nr) -{ - int i; - u32 *ier = IFXMIPS_ICU_IM0_IER; - u32 *isr = IFXMIPS_ICU_IM0_ISR; - - irq_nr -= INT_NUM_IRQ0; - for (i = 0; i <= 4; i++) - { - if (irq_nr < INT_NUM_IM_OFFSET) - { - ifxmips_w32(ifxmips_r32(ier) & ~(1 << irq_nr), ier); - ifxmips_w32((1 << irq_nr), isr); - return; - } - ier += IFXMIPS_ICU_OFFSET; - isr += IFXMIPS_ICU_OFFSET; - irq_nr -= INT_NUM_IM_OFFSET; - } -} -EXPORT_SYMBOL(ifxmips_mask_and_ack_irq); - -void -ifxmips_enable_irq(unsigned int irq_nr) -{ - int i; - u32 *ier = IFXMIPS_ICU_IM0_IER; - - irq_nr -= INT_NUM_IRQ0; - for (i = 0; i <= 4; i++) - { - if (irq_nr < INT_NUM_IM_OFFSET) - { - ifxmips_w32(ifxmips_r32(ier) | (1 << irq_nr), ier); - return; - } - ier += IFXMIPS_ICU_OFFSET; - irq_nr -= INT_NUM_IM_OFFSET; - } -} -EXPORT_SYMBOL(ifxmips_enable_irq); - -static unsigned int -ifxmips_startup_irq(unsigned int irq) -{ - ifxmips_enable_irq(irq); - return 0; -} - -static void -ifxmips_end_irq(unsigned int irq) -{ - if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) - ifxmips_enable_irq(irq); -} - -static struct irq_chip -ifxmips_irq_type = { - "ifxmips", - .startup = ifxmips_startup_irq, - .enable = ifxmips_enable_irq, - .disable = ifxmips_disable_irq, - .unmask = ifxmips_enable_irq, - .ack = ifxmips_end_irq, - .mask = ifxmips_disable_irq, - .mask_ack = ifxmips_mask_and_ack_irq, - .end = ifxmips_end_irq, -}; - -/* silicon bug causes only the msb set to 1 to be valid. all - other bits might be bogus */ -static inline int -ls1bit32(unsigned long x) -{ - __asm__ ( - ".set push \n" - ".set mips32 \n" - "clz %0, %1 \n" - ".set pop \n" - : "=r" (x) - : "r" (x)); - return 31 - x; -} - -static void -ifxmips_hw_irqdispatch(int module) -{ - u32 irq; - - irq = ifxmips_r32(IFXMIPS_ICU_IM0_IOSR + (module * IFXMIPS_ICU_OFFSET)); - if (irq == 0) - return; - - /* we need to do this due to a silicon bug */ - irq = ls1bit32(irq); - do_IRQ((int)irq + INT_NUM_IM0_IRL0 + (INT_NUM_IM_OFFSET * module)); - - if ((irq == 22) && (module == 0)) - ifxmips_w32(ifxmips_r32(IFXMIPS_EBU_PCC_ISTAT) | 0x10, - IFXMIPS_EBU_PCC_ISTAT); -} - -#ifdef CONFIG_CPU_MIPSR2_IRQ_VI -#define DEFINE_HWx_IRQDISPATCH(x) \ -static void ifxmips_hw ## x ## _irqdispatch(void)\ -{\ - ifxmips_hw_irqdispatch(x); \ -} -static void ifxmips_hw5_irqdispatch(void) -{ - do_IRQ(MIPS_CPU_TIMER_IRQ); -} -DEFINE_HWx_IRQDISPATCH(0) -DEFINE_HWx_IRQDISPATCH(1) -DEFINE_HWx_IRQDISPATCH(2) -DEFINE_HWx_IRQDISPATCH(3) -DEFINE_HWx_IRQDISPATCH(4) -/*DEFINE_HWx_IRQDISPATCH(5)*/ -#endif /* #ifdef CONFIG_CPU_MIPSR2_IRQ_VI */ - -asmlinkage void -plat_irq_dispatch(void) -{ - unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM; - unsigned int i; - - if (pending & CAUSEF_IP7) - { - do_IRQ(MIPS_CPU_TIMER_IRQ); - goto out; - } else { - for (i = 0; i < 5; i++) - { - if (pending & (CAUSEF_IP2 << i)) - { - ifxmips_hw_irqdispatch(i); - goto out; - } - } - } - printk(KERN_ALERT "Spurious IRQ: CAUSE=0x%08x\n", read_c0_status()); - -out: - return; -} - -static struct irqaction -cascade = { - .handler = no_action, - .flags = IRQF_DISABLED, - .name = "cascade", -}; - -void __init -arch_init_irq(void) -{ - int i; - - for (i = 0; i < 5; i++) - ifxmips_w32(0, IFXMIPS_ICU_IM0_IER + (i * IFXMIPS_ICU_OFFSET)); - - mips_cpu_irq_init(); - - for (i = 2; i <= 6; i++) - setup_irq(i, &cascade); - -#ifdef CONFIG_CPU_MIPSR2_IRQ_VI - if (cpu_has_vint) { - printk(KERN_INFO "Setting up vectored interrupts\n"); - set_vi_handler(2, ifxmips_hw0_irqdispatch); - set_vi_handler(3, ifxmips_hw1_irqdispatch); - set_vi_handler(4, ifxmips_hw2_irqdispatch); - set_vi_handler(5, ifxmips_hw3_irqdispatch); - set_vi_handler(6, ifxmips_hw4_irqdispatch); - set_vi_handler(7, ifxmips_hw5_irqdispatch); - } -#endif - - for (i = INT_NUM_IRQ0; i <= (INT_NUM_IRQ0 + (5 * INT_NUM_IM_OFFSET)); i++) - set_irq_chip_and_handler(i, &ifxmips_irq_type, - handle_level_irq); - - #if !defined(CONFIG_MIPS_MT_SMP) && !defined(CONFIG_MIPS_MT_SMTC) - set_c0_status(IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | - IE_IRQ3 | IE_IRQ4 | IE_IRQ5); - #else - set_c0_status(IE_SW0 | IE_SW1 | IE_IRQ0 | IE_IRQ1 | - IE_IRQ2 | IE_IRQ3 | IE_IRQ4 | IE_IRQ5); - #endif -} - -void __cpuinit -arch_fixup_c0_irqs(void) -{ - /* FIXME: check for CPUID and only do fix for specific chips/versions */ - cp0_compare_irq = CP0_LEGACY_COMPARE_IRQ; - cp0_perfcount_irq = CP0_LEGACY_PERFCNT_IRQ; -} |