diff options
| -rw-r--r-- | arch/i386/kernel/io_apic.c | 40 | ||||
| -rw-r--r-- | include/asm-i386/io_apic.h | 29 |
2 files changed, 41 insertions, 28 deletions
diff --git a/arch/i386/kernel/io_apic.c b/arch/i386/kernel/io_apic.c index 350192d6ab98..eb10bd5da64e 100644 --- a/arch/i386/kernel/io_apic.c +++ b/arch/i386/kernel/io_apic.c @@ -91,6 +91,46 @@ static struct irq_pin_list { int apic, pin, next; } irq_2_pin[PIN_MAP_SIZE]; +struct io_apic { + unsigned int index; + unsigned int unused[3]; + unsigned int data; +}; + +static __attribute_const__ struct io_apic __iomem *io_apic_base(int idx) +{ + return (void __iomem *) __fix_to_virt(FIX_IO_APIC_BASE_0 + idx) + + (mp_ioapics[idx].mpc_apicaddr & ~PAGE_MASK); +} + +static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg) +{ + struct io_apic __iomem *io_apic = io_apic_base(apic); + writel(reg, &io_apic->index); + return readl(&io_apic->data); +} + +static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned int value) +{ + struct io_apic __iomem *io_apic = io_apic_base(apic); + writel(reg, &io_apic->index); + writel(value, &io_apic->data); +} + +/* + * Re-write a value: to be used for read-modify-write + * cycles where the read already set up the index register. + * + * Older SiS APIC requires we rewrite the index register + */ +static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value) +{ + volatile struct io_apic *io_apic = io_apic_base(apic); + if (sis_apic_bug) + writel(reg, &io_apic->index); + writel(value, &io_apic->data); +} + union entry_union { struct { u32 w1, w2; }; struct IO_APIC_route_entry entry; diff --git a/include/asm-i386/io_apic.h b/include/asm-i386/io_apic.h index 276ea7e8144a..059a9ff28b4d 100644 --- a/include/asm-i386/io_apic.h +++ b/include/asm-i386/io_apic.h @@ -12,10 +12,6 @@ #ifdef CONFIG_X86_IO_APIC -#define IO_APIC_BASE(idx) \ - ((volatile int *)(__fix_to_virt(FIX_IO_APIC_BASE_0 + idx) \ - + (mp_ioapics[idx].mpc_apicaddr & ~PAGE_MASK))) - /* * The structure of the IO-APIC: */ @@ -119,31 +115,8 @@ extern struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES]; /* non-0 if default (table-less) MP configuration */ extern int mpc_default_type; -static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg) -{ - *IO_APIC_BASE(apic) = reg; - return *(IO_APIC_BASE(apic)+4); -} - -static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned int value) -{ - *IO_APIC_BASE(apic) = reg; - *(IO_APIC_BASE(apic)+4) = value; -} - -/* - * Re-write a value: to be used for read-modify-write - * cycles where the read already set up the index register. - * - * Older SiS APIC requires we rewrite the index regiser - */ +/* Older SiS APIC requires we rewrite the index register */ extern int sis_apic_bug; -static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value) -{ - if (sis_apic_bug) - *IO_APIC_BASE(apic) = reg; - *(IO_APIC_BASE(apic)+4) = value; -} /* 1 if "noapic" boot option passed */ extern int skip_ioapic_setup; |