diff options
Diffstat (limited to 'arch/sh/kernel/irq.c')
| -rw-r--r-- | arch/sh/kernel/irq.c | 55 |
1 files changed, 44 insertions, 11 deletions
diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c index 944128ce9706..67be2b6e8cd1 100644 --- a/arch/sh/kernel/irq.c +++ b/arch/sh/kernel/irq.c @@ -12,7 +12,7 @@ #include <linux/kernel_stat.h> #include <linux/seq_file.h> #include <linux/io.h> -#include <asm/irq.h> +#include <linux/irq.h> #include <asm/processor.h> #include <asm/uaccess.h> #include <asm/thread_info.h> @@ -78,15 +78,16 @@ union irq_ctx { u32 stack[THREAD_SIZE/sizeof(u32)]; }; -static union irq_ctx *hardirq_ctx[NR_CPUS]; -static union irq_ctx *softirq_ctx[NR_CPUS]; +static union irq_ctx *hardirq_ctx[NR_CPUS] __read_mostly; +static union irq_ctx *softirq_ctx[NR_CPUS] __read_mostly; #endif asmlinkage int do_IRQ(unsigned long r4, unsigned long r5, unsigned long r6, unsigned long r7, - struct pt_regs regs) + struct pt_regs __regs) { - struct pt_regs *old_regs = set_irq_regs(®s); + struct pt_regs *regs = RELOC_HIDE(&__regs, 0); + struct pt_regs *old_regs = set_irq_regs(regs); int irq; #ifdef CONFIG_4KSTACKS union irq_ctx *curctx, *irqctx; @@ -111,7 +112,7 @@ asmlinkage int do_IRQ(unsigned long r4, unsigned long r5, #endif #ifdef CONFIG_CPU_HAS_INTEVT - irq = (ctrl_inl(INTEVT) >> 5) - 16; + irq = evt2irq(ctrl_inl(INTEVT)); #else irq = r4; #endif @@ -135,17 +136,24 @@ asmlinkage int do_IRQ(unsigned long r4, unsigned long r5, irqctx->tinfo.task = curctx->tinfo.task; irqctx->tinfo.previous_sp = current_stack_pointer; + /* + * Copy the softirq bits in preempt_count so that the + * softirq checks work in the hardirq context. + */ + irqctx->tinfo.preempt_count = + (irqctx->tinfo.preempt_count & ~SOFTIRQ_MASK) | + (curctx->tinfo.preempt_count & SOFTIRQ_MASK); + __asm__ __volatile__ ( "mov %0, r4 \n" - "mov r15, r9 \n" + "mov r15, r8 \n" "jsr @%1 \n" /* swith to the irq stack */ " mov %2, r15 \n" /* restore the stack (ring zero) */ - "mov r9, r15 \n" + "mov r8, r15 \n" : /* no outputs */ : "r" (irq), "r" (generic_handle_irq), "r" (isp) - /* XXX: A somewhat excessive clobber list? -PFM */ : "memory", "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "t", "pr" ); @@ -193,7 +201,7 @@ void irq_ctx_init(int cpu) irqctx->tinfo.task = NULL; irqctx->tinfo.exec_domain = NULL; irqctx->tinfo.cpu = cpu; - irqctx->tinfo.preempt_count = SOFTIRQ_OFFSET; + irqctx->tinfo.preempt_count = 0; irqctx->tinfo.addr_limit = MAKE_MM_SEG(0); softirq_ctx[cpu] = irqctx; @@ -239,13 +247,38 @@ asmlinkage void do_softirq(void) "mov r9, r15 \n" : /* no outputs */ : "r" (__do_softirq), "r" (isp) - /* XXX: A somewhat excessive clobber list? -PFM */ : "memory", "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r15", "t", "pr" ); + + /* + * Shouldnt happen, we returned above if in_interrupt(): + */ + WARN_ON_ONCE(softirq_count()); } local_irq_restore(flags); } EXPORT_SYMBOL(do_softirq); #endif + +void __init init_IRQ(void) +{ +#ifdef CONFIG_CPU_HAS_PINT_IRQ + init_IRQ_pint(); +#endif + +#ifdef CONFIG_CPU_HAS_INTC2_IRQ + init_IRQ_intc2(); +#endif + +#ifdef CONFIG_CPU_HAS_IPR_IRQ + init_IRQ_ipr(); +#endif + + /* Perform the machine specific initialisation */ + if (sh_mv.mv_init_irq) + sh_mv.mv_init_irq(); + + irq_ctx_init(smp_processor_id()); +} |