diff options
Diffstat (limited to 'arch/x86/include/asm/genapic.h')
| -rw-r--r-- | arch/x86/include/asm/genapic.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/arch/x86/include/asm/genapic.h b/arch/x86/include/asm/genapic.h index 273b99452ae..a6d0b00a544 100644 --- a/arch/x86/include/asm/genapic.h +++ b/arch/x86/include/asm/genapic.h @@ -5,6 +5,7 @@ #include <asm/mpspec.h> #include <asm/atomic.h> +#include <asm/apic.h> /* * Copyright 2004 James Cleverdon, IBM. @@ -83,10 +84,70 @@ struct genapic { void (*smp_callin_clear_local_apic)(void); void (*store_NMI_vector)(unsigned short *high, unsigned short *low); void (*inquire_remote_apic)(int apicid); + + /* apic ops */ + u32 (*read)(u32 reg); + void (*write)(u32 reg, u32 v); + u64 (*icr_read)(void); + void (*icr_write)(u32 low, u32 high); + void (*wait_icr_idle)(void); + u32 (*safe_wait_icr_idle)(void); }; extern struct genapic *apic; +static inline u32 apic_read(u32 reg) +{ + return apic->read(reg); +} + +static inline void apic_write(u32 reg, u32 val) +{ + apic->write(reg, val); +} + +static inline u64 apic_icr_read(void) +{ + return apic->icr_read(); +} + +static inline void apic_icr_write(u32 low, u32 high) +{ + apic->icr_write(low, high); +} + +static inline void apic_wait_icr_idle(void) +{ + apic->wait_icr_idle(); +} + +static inline u32 safe_apic_wait_icr_idle(void) +{ + return apic->safe_wait_icr_idle(); +} + + +static inline void ack_APIC_irq(void) +{ + /* + * ack_APIC_irq() actually gets compiled as a single instruction + * ... yummie. + */ + + /* Docs say use 0 for future compatibility */ + apic_write(APIC_EOI, 0); +} + +static inline unsigned default_get_apic_id(unsigned long x) +{ + unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR)); + + if (APIC_XAPIC(ver)) + return (x >> 24) & 0xFF; + else + return (x >> 24) & 0x0F; +} + /* * Warm reset vector default position: */ |