diff options
| -rw-r--r-- | arch/i386/kernel/apic.c | 22 | ||||
| -rw-r--r-- | include/asm-i386/apic.h | 9 |
2 files changed, 25 insertions, 6 deletions
diff --git a/arch/i386/kernel/apic.c b/arch/i386/kernel/apic.c index 93aa911646ad..aca054cc0552 100644 --- a/arch/i386/kernel/apic.c +++ b/arch/i386/kernel/apic.c @@ -129,6 +129,28 @@ static int modern_apic(void) return lapic_get_version() >= 0x14; } +void apic_wait_icr_idle(void) +{ + while (apic_read(APIC_ICR) & APIC_ICR_BUSY) + cpu_relax(); +} + +unsigned long safe_apic_wait_icr_idle(void) +{ + unsigned long send_status; + int timeout; + + timeout = 0; + do { + send_status = apic_read(APIC_ICR) & APIC_ICR_BUSY; + if (!send_status) + break; + udelay(100); + } while (timeout++ < 1000); + + return send_status; +} + /** * enable_NMI_through_LVT0 - enable NMI through local vector table 0 */ diff --git a/include/asm-i386/apic.h b/include/asm-i386/apic.h index a19810a08ae9..1e8f6f252dd3 100644 --- a/include/asm-i386/apic.h +++ b/include/asm-i386/apic.h @@ -2,6 +2,7 @@ #define __ASM_APIC_H #include <linux/pm.h> +#include <linux/delay.h> #include <asm/fixmap.h> #include <asm/apicdef.h> #include <asm/processor.h> @@ -64,12 +65,8 @@ static __inline fastcall unsigned long native_apic_read(unsigned long reg) return *((volatile unsigned long *)(APIC_BASE+reg)); } -static __inline__ void apic_wait_icr_idle(void) -{ - while ( apic_read( APIC_ICR ) & APIC_ICR_BUSY ) - cpu_relax(); -} - +void apic_wait_icr_idle(void); +unsigned long safe_apic_wait_icr_idle(void); int get_physical_broadcast(void); #ifdef CONFIG_X86_GOOD_APIC |