5 #include <asm/fixmap.h>
6 #include <asm/apicdef.h>
7 #include <asm/processor.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 extern void generic_apic_probe(void);
35 #ifdef CONFIG_X86_LOCAL_APIC
38 * Basic functions accessing APICs.
41 static __inline void apic_write(unsigned long reg, unsigned long v)
43 *((volatile unsigned long *)(APIC_BASE+reg)) = v;
46 static __inline void apic_write_atomic(unsigned long reg, unsigned long v)
48 xchg((volatile unsigned long *)(APIC_BASE+reg), v);
51 static __inline unsigned long apic_read(unsigned long reg)
53 return *((volatile unsigned long *)(APIC_BASE+reg));
56 static __inline__ void apic_wait_icr_idle(void)
58 while ( apic_read( APIC_ICR ) & APIC_ICR_BUSY )
62 int get_physical_broadcast(void);
64 #ifdef CONFIG_X86_GOOD_APIC
65 # define FORCE_READ_AROUND_WRITE 0
66 # define apic_read_around(x)
67 # define apic_write_around(x,y) apic_write((x),(y))
69 # define FORCE_READ_AROUND_WRITE 1
70 # define apic_read_around(x) apic_read(x)
71 # define apic_write_around(x,y) apic_write_atomic((x),(y))
74 static inline void ack_APIC_irq(void)
77 * ack_APIC_irq() actually gets compiled as a single instruction:
78 * - a single rmw on Pentium/82489DX
79 * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
83 /* Docs say use 0 for future compatibility */
84 apic_write_around(APIC_EOI, 0);
87 extern void (*wait_timer_tick)(void);
89 extern int get_maxlvt(void);
90 extern void clear_local_APIC(void);
91 extern void connect_bsp_APIC (void);
92 extern void disconnect_bsp_APIC (int virt_wire_setup);
93 extern void disable_local_APIC (void);
94 extern void lapic_shutdown (void);
95 extern int verify_local_APIC (void);
96 extern void cache_APIC_registers (void);
97 extern void sync_Arb_IDs (void);
98 extern void init_bsp_APIC (void);
99 extern void setup_local_APIC (void);
100 extern void init_apic_mappings (void);
101 extern void smp_local_timer_interrupt (void);
102 extern void setup_boot_APIC_clock (void);
103 extern void setup_secondary_APIC_clock (void);
104 extern int APIC_init_uniprocessor (void);
105 extern void disable_APIC_timer(void);
106 extern void enable_APIC_timer(void);
108 extern void enable_NMI_through_LVT0 (void * dummy);
110 void smp_send_timer_broadcast_ipi(void);
111 void switch_APIC_timer_to_ipi(void *cpumask);
112 void switch_ipi_to_APIC_timer(void *cpumask);
113 #define ARCH_APICTIMER_STOPS_ON_C3 1
115 extern int timer_over_8254;
117 #else /* !CONFIG_X86_LOCAL_APIC */
118 static inline void lapic_shutdown(void) { }
120 #endif /* !CONFIG_X86_LOCAL_APIC */
122 #endif /* __ASM_APIC_H */