13623d7930
Add APIC accessors to paravirt-ops. Unfortunately, we need two write functions, as some older broken hardware requires workarounds for Pentium APIC errata - this is the purpose of apic_write_atomic. AK: replaced __inline with inline Signed-off-by: Zachary Amsden <zach@vmware.com> Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Andrew Morton <akpm@osdl.org>
132 lines
3.2 KiB
C
132 lines
3.2 KiB
C
#ifndef __ASM_APIC_H
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#define __ASM_APIC_H
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#include <linux/pm.h>
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#include <asm/fixmap.h>
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#include <asm/apicdef.h>
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#include <asm/processor.h>
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#include <asm/system.h>
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#define Dprintk(x...)
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/*
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* Debugging macros
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*/
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#define APIC_QUIET 0
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#define APIC_VERBOSE 1
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#define APIC_DEBUG 2
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extern int apic_verbosity;
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/*
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* Define the default level of output to be very little
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* This can be turned up by using apic=verbose for more
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* information and apic=debug for _lots_ of information.
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* apic_verbosity is defined in apic.c
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*/
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#define apic_printk(v, s, a...) do { \
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if ((v) <= apic_verbosity) \
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printk(s, ##a); \
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} while (0)
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extern void generic_apic_probe(void);
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#ifdef CONFIG_X86_LOCAL_APIC
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/*
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* Basic functions accessing APICs.
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*/
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#ifdef CONFIG_PARAVIRT
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#include <asm/paravirt.h>
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#else
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#define apic_write native_apic_write
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#define apic_write_atomic native_apic_write_atomic
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#define apic_read native_apic_read
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#endif
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static __inline fastcall void native_apic_write(unsigned long reg,
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unsigned long v)
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{
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*((volatile unsigned long *)(APIC_BASE+reg)) = v;
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}
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static __inline fastcall void native_apic_write_atomic(unsigned long reg,
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unsigned long v)
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{
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xchg((volatile unsigned long *)(APIC_BASE+reg), v);
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}
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static __inline fastcall unsigned long native_apic_read(unsigned long reg)
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{
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return *((volatile unsigned long *)(APIC_BASE+reg));
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}
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static __inline__ void apic_wait_icr_idle(void)
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{
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while ( apic_read( APIC_ICR ) & APIC_ICR_BUSY )
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cpu_relax();
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}
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int get_physical_broadcast(void);
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#ifdef CONFIG_X86_GOOD_APIC
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# define FORCE_READ_AROUND_WRITE 0
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# define apic_read_around(x)
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# define apic_write_around(x,y) apic_write((x),(y))
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#else
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# define FORCE_READ_AROUND_WRITE 1
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# define apic_read_around(x) apic_read(x)
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# define apic_write_around(x,y) apic_write_atomic((x),(y))
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#endif
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static inline void ack_APIC_irq(void)
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{
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/*
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* ack_APIC_irq() actually gets compiled as a single instruction:
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* - a single rmw on Pentium/82489DX
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* - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
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* ... yummie.
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*/
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/* Docs say use 0 for future compatibility */
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apic_write_around(APIC_EOI, 0);
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}
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extern void (*wait_timer_tick)(void);
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extern int get_maxlvt(void);
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extern void clear_local_APIC(void);
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extern void connect_bsp_APIC (void);
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extern void disconnect_bsp_APIC (int virt_wire_setup);
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extern void disable_local_APIC (void);
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extern void lapic_shutdown (void);
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extern int verify_local_APIC (void);
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extern void cache_APIC_registers (void);
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extern void sync_Arb_IDs (void);
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extern void init_bsp_APIC (void);
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extern void setup_local_APIC (void);
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extern void init_apic_mappings (void);
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extern void smp_local_timer_interrupt (void);
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extern void setup_boot_APIC_clock (void);
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extern void setup_secondary_APIC_clock (void);
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extern int APIC_init_uniprocessor (void);
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extern void disable_APIC_timer(void);
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extern void enable_APIC_timer(void);
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extern void enable_NMI_through_LVT0 (void * dummy);
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void smp_send_timer_broadcast_ipi(void);
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void switch_APIC_timer_to_ipi(void *cpumask);
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void switch_ipi_to_APIC_timer(void *cpumask);
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#define ARCH_APICTIMER_STOPS_ON_C3 1
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extern int timer_over_8254;
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#else /* !CONFIG_X86_LOCAL_APIC */
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static inline void lapic_shutdown(void) { }
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#endif /* !CONFIG_X86_LOCAL_APIC */
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#endif /* __ASM_APIC_H */
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