diff options
Diffstat (limited to 'arch/x86/kernel/io_apic.c')
| -rw-r--r-- | arch/x86/kernel/io_apic.c | 80 |
1 files changed, 21 insertions, 59 deletions
diff --git a/arch/x86/kernel/io_apic.c b/arch/x86/kernel/io_apic.c index 7e303e0..0996961 100644 --- a/arch/x86/kernel/io_apic.c +++ b/arch/x86/kernel/io_apic.c @@ -610,18 +610,7 @@ static void __init replace_pin_at_irq(unsigned int irq, add_pin_to_irq(irq, newapic, newpin); } -#ifdef CONFIG_X86_64 -/* - * Synchronize the IO-APIC and the CPU by doing - * a dummy read from the IO-APIC - */ -static inline void io_apic_sync(unsigned int apic) -{ - struct io_apic __iomem *io_apic = io_apic_base(apic); - readl(&io_apic->data); -} - -#define __DO_ACTION(R, ACTION, FINAL) \ +#define __DO_ACTION(R, ACTION_ENABLE, ACTION_DISABLE, FINAL) \ \ { \ int pin; \ @@ -636,7 +625,8 @@ static inline void io_apic_sync(unsigned int apic) break; \ pin = entry->pin; \ reg = io_apic_read(entry->apic, 0x10 + R + pin*2); \ - reg ACTION; \ + reg ACTION_DISABLE; \ + reg ACTION_ENABLE; \ io_apic_modify(entry->apic, 0x10 + R + pin*2, reg); \ FINAL; \ if (!entry->next) \ @@ -645,66 +635,38 @@ static inline void io_apic_sync(unsigned int apic) } \ } -#define DO_ACTION(name,R,ACTION, FINAL) \ +#define DO_ACTION(name,R, ACTION_ENABLE, ACTION_DISABLE, FINAL) \ \ static void name##_IO_APIC_irq (unsigned int irq) \ - __DO_ACTION(R, ACTION, FINAL) - -/* mask = 1 */ -DO_ACTION(__mask, 0, |= IO_APIC_REDIR_MASKED, io_apic_sync(entry->apic)) + __DO_ACTION(R, ACTION_ENABLE, ACTION_DISABLE, FINAL) /* mask = 0 */ -DO_ACTION(__unmask, 0, &= ~IO_APIC_REDIR_MASKED, ) +DO_ACTION(__unmask, 0, |= 0, &= ~IO_APIC_REDIR_MASKED, ) -#else - -static void __modify_IO_APIC_irq(unsigned int irq, unsigned long enable, unsigned long disable) +#ifdef CONFIG_X86_64 +/* + * Synchronize the IO-APIC and the CPU by doing + * a dummy read from the IO-APIC + */ +static inline void io_apic_sync(unsigned int apic) { - struct irq_cfg *cfg; - struct irq_pin_list *entry; - unsigned int pin, reg; - - cfg = irq_cfg(irq); - entry = cfg->irq_2_pin; - for (;;) { - if (!entry) - break; - pin = entry->pin; - reg = io_apic_read(entry->apic, 0x10 + pin*2); - reg &= ~disable; - reg |= enable; - io_apic_modify(entry->apic, 0x10 + pin*2, reg); - if (!entry->next) - break; - entry = entry->next; - } + struct io_apic __iomem *io_apic = io_apic_base(apic); + readl(&io_apic->data); } /* mask = 1 */ -static void __mask_IO_APIC_irq(unsigned int irq) -{ - __modify_IO_APIC_irq(irq, IO_APIC_REDIR_MASKED, 0); -} +DO_ACTION(__mask, 0, |= IO_APIC_REDIR_MASKED, &= ~0, io_apic_sync(entry->apic)) -/* mask = 0 */ -static void __unmask_IO_APIC_irq(unsigned int irq) -{ - __modify_IO_APIC_irq(irq, 0, IO_APIC_REDIR_MASKED); -} +#else + +/* mask = 1 */ +DO_ACTION(__mask, 0, |= IO_APIC_REDIR_MASKED, &= ~0, ) /* mask = 1, trigger = 0 */ -static void __mask_and_edge_IO_APIC_irq(unsigned int irq) -{ - __modify_IO_APIC_irq(irq, IO_APIC_REDIR_MASKED, - IO_APIC_REDIR_LEVEL_TRIGGER); -} +DO_ACTION(__mask_and_edge, 0, |= IO_APIC_REDIR_MASKED, &= ~IO_APIC_REDIR_LEVEL_TRIGGER, ) /* mask = 0, trigger = 1 */ -static void __unmask_and_level_IO_APIC_irq(unsigned int irq) -{ - __modify_IO_APIC_irq(irq, IO_APIC_REDIR_LEVEL_TRIGGER, - IO_APIC_REDIR_MASKED); -} +DO_ACTION(__unmask_and_level, 0, |= IO_APIC_REDIR_LEVEL_TRIGGER, &= ~IO_APIC_REDIR_MASKED, ) #endif |
