1 #ifndef _ASM_X86_APIC_H
2 #define _ASM_X86_APIC_H
5 #include <linux/delay.h>
7 #include <asm/alternative.h>
8 #include <asm/fixmap.h>
9 #include <asm/apicdef.h>
10 #include <asm/processor.h>
11 #include <asm/system.h>
12 #include <asm/cpufeature.h>
15 #define ARCH_APICTIMER_STOPS_ON_C3 1
21 #define APIC_VERBOSE 1
25 * Define the default level of output to be very little
26 * This can be turned up by using apic=verbose for more
27 * information and apic=debug for _lots_ of information.
28 * apic_verbosity is defined in apic.c
30 #define apic_printk(v, s, a...) do { \
31 if ((v) <= apic_verbosity) \
36 extern void generic_apic_probe(void);
38 #ifdef CONFIG_X86_LOCAL_APIC
40 extern unsigned int apic_verbosity;
41 extern int local_apic_timer_c2_ok;
43 extern int ioapic_force;
45 extern int disable_apic;
47 * Basic functions accessing APICs.
49 #ifdef CONFIG_PARAVIRT
50 #include <asm/paravirt.h>
52 #define setup_boot_clock setup_boot_APIC_clock
53 #define setup_secondary_clock setup_secondary_APIC_clock
56 extern int is_vsmp_box(void);
58 static inline void native_apic_mem_write(u32 reg, u32 v)
60 volatile u32 *addr = (volatile u32 *)(APIC_BASE + reg);
62 alternative_io("movl %0, %1", "xchgl %0, %1", X86_FEATURE_11AP,
63 ASM_OUTPUT2("=r" (v), "=m" (*addr)),
64 ASM_OUTPUT2("0" (v), "m" (*addr)));
67 static inline u32 native_apic_mem_read(u32 reg)
69 return *((volatile u32 *)(APIC_BASE + reg));
72 static inline void native_apic_msr_write(u32 reg, u32 v)
74 if (reg == APIC_DFR || reg == APIC_ID || reg == APIC_LDR ||
78 wrmsr(APIC_BASE_MSR + (reg >> 4), v, 0);
81 static inline u32 native_apic_msr_read(u32 reg)
88 rdmsr(APIC_BASE_MSR + (reg >> 4), low, high);
93 extern int x2apic, x2apic_preenabled;
94 extern void check_x2apic(void);
95 extern void enable_x2apic(void);
96 extern void enable_IR_x2apic(void);
97 extern void x2apic_icr_write(u32 low, u32 id);
101 u32 (*read)(u32 reg);
102 void (*write)(u32 reg, u32 v);
103 u64 (*icr_read)(void);
104 void (*icr_write)(u32 low, u32 high);
105 void (*wait_icr_idle)(void);
106 u32 (*safe_wait_icr_idle)(void);
109 extern struct apic_ops *apic_ops;
111 #define apic_read (apic_ops->read)
112 #define apic_write (apic_ops->write)
113 #define apic_icr_read (apic_ops->icr_read)
114 #define apic_icr_write (apic_ops->icr_write)
115 #define apic_wait_icr_idle (apic_ops->wait_icr_idle)
116 #define safe_apic_wait_icr_idle (apic_ops->safe_wait_icr_idle)
118 extern int get_physical_broadcast(void);
121 static inline void ack_x2APIC_irq(void)
123 /* Docs say use 0 for future compatibility */
124 native_apic_msr_write(APIC_EOI, 0);
129 static inline void ack_APIC_irq(void)
132 * ack_APIC_irq() actually gets compiled as a single instruction:
133 * - a single rmw on Pentium/82489DX
134 * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
138 /* Docs say use 0 for future compatibility */
139 apic_write(APIC_EOI, 0);
142 extern int lapic_get_maxlvt(void);
143 extern void clear_local_APIC(void);
144 extern void connect_bsp_APIC(void);
145 extern void disconnect_bsp_APIC(int virt_wire_setup);
146 extern void disable_local_APIC(void);
147 extern void lapic_shutdown(void);
148 extern int verify_local_APIC(void);
149 extern void cache_APIC_registers(void);
150 extern void sync_Arb_IDs(void);
151 extern void init_bsp_APIC(void);
152 extern void setup_local_APIC(void);
153 extern void end_local_APIC_setup(void);
154 extern void init_apic_mappings(void);
155 extern void setup_boot_APIC_clock(void);
156 extern void setup_secondary_APIC_clock(void);
157 extern int APIC_init_uniprocessor(void);
158 extern void enable_NMI_through_LVT0(void);
161 * On 32bit this is mach-xxx local
164 extern void early_init_lapic_mapping(void);
165 extern int apic_is_clustered_box(void);
167 static inline int apic_is_clustered_box(void)
173 extern u8 setup_APIC_eilvt_mce(u8 vector, u8 msg_type, u8 mask);
174 extern u8 setup_APIC_eilvt_ibs(u8 vector, u8 msg_type, u8 mask);
177 #else /* !CONFIG_X86_LOCAL_APIC */
178 static inline void lapic_shutdown(void) { }
179 #define local_apic_timer_c2_ok 1
180 static inline void init_apic_mappings(void) { }
182 #endif /* !CONFIG_X86_LOCAL_APIC */
184 #endif /* __ASM_APIC_H */