4 #include <linux/config.h>
6 #include <asm/fixmap.h>
7 #include <asm/apicdef.h>
8 #include <asm/system.h>
16 #define APIC_VERBOSE 1
19 extern int apic_verbosity;
22 * Define the default level of output to be very little
23 * This can be turned up by using apic=verbose for more
24 * information and apic=debug for _lots_ of information.
25 * apic_verbosity is defined in apic.c
27 #define apic_printk(v, s, a...) do { \
28 if ((v) <= apic_verbosity) \
33 #ifdef CONFIG_X86_LOCAL_APIC
36 * Basic functions accessing APICs.
39 static __inline void apic_write(unsigned long reg, unsigned long v)
41 *((volatile unsigned long *)(APIC_BASE+reg)) = v;
44 static __inline void apic_write_atomic(unsigned long reg, unsigned long v)
46 xchg((volatile unsigned long *)(APIC_BASE+reg), v);
49 static __inline unsigned long apic_read(unsigned long reg)
51 return *((volatile unsigned long *)(APIC_BASE+reg));
54 static __inline__ void apic_wait_icr_idle(void)
56 while ( apic_read( APIC_ICR ) & APIC_ICR_BUSY )
60 int get_physical_broadcast(void);
62 #ifdef CONFIG_X86_GOOD_APIC
63 # define FORCE_READ_AROUND_WRITE 0
64 # define apic_read_around(x)
65 # define apic_write_around(x,y) apic_write((x),(y))
67 # define FORCE_READ_AROUND_WRITE 1
68 # define apic_read_around(x) apic_read(x)
69 # define apic_write_around(x,y) apic_write_atomic((x),(y))
72 static inline void ack_APIC_irq(void)
75 * ack_APIC_irq() actually gets compiled as a single instruction:
76 * - a single rmw on Pentium/82489DX
77 * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
81 /* Docs say use 0 for future compatibility */
82 apic_write_around(APIC_EOI, 0);
85 extern void (*wait_timer_tick)(void);
87 extern int get_maxlvt(void);
88 extern void clear_local_APIC(void);
89 extern void connect_bsp_APIC (void);
90 extern void disconnect_bsp_APIC (void);
91 extern void disable_local_APIC (void);
92 extern void lapic_shutdown (void);
93 extern int verify_local_APIC (void);
94 extern void cache_APIC_registers (void);
95 extern void sync_Arb_IDs (void);
96 extern void init_bsp_APIC (void);
97 extern void setup_local_APIC (void);
98 extern void init_apic_mappings (void);
99 extern void smp_local_timer_interrupt (struct pt_regs * regs);
100 extern void setup_boot_APIC_clock (void);
101 extern void setup_secondary_APIC_clock (void);
102 extern void setup_apic_nmi_watchdog (void);
103 extern int reserve_lapic_nmi(void);
104 extern void release_lapic_nmi(void);
105 extern void disable_timer_nmi_watchdog(void);
106 extern void enable_timer_nmi_watchdog(void);
107 extern void nmi_watchdog_tick (struct pt_regs * regs);
108 extern int APIC_init_uniprocessor (void);
109 extern void disable_APIC_timer(void);
110 extern void enable_APIC_timer(void);
112 extern void enable_NMI_through_LVT0 (void * dummy);
114 extern unsigned int nmi_watchdog;
116 #define NMI_IO_APIC 1
117 #define NMI_LOCAL_APIC 2
118 #define NMI_INVALID 3
120 #else /* !CONFIG_X86_LOCAL_APIC */
121 static inline void lapic_shutdown(void) { }
123 #endif /* !CONFIG_X86_LOCAL_APIC */
125 #endif /* __ASM_APIC_H */