include/asm-x86/apic.h

   1 #ifndef ASM_X86__APIC_H
   2 #define ASM_X86__APIC_H
   3
   4 #include <linux/pm.h>
   5 #include <linux/delay.h>
   6
   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>
  13 #include <asm/msr.h>
  14
  15 #define ARCH_APICTIMER_STOPS_ON_C3      1
  16
  17 /*
  18  * Debugging macros
  19  */
  20 #define APIC_QUIET   0
  21 #define APIC_VERBOSE 1
  22 #define APIC_DEBUG   2
  23
  24 /*
  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
  29  */
  30 #define apic_printk(v, s, a...) do {       \
  31                 if ((v) <= apic_verbosity) \
  32                         printk(s, ##a);    \
  33         } while (0)
  34
  35
  36 extern void generic_apic_probe(void);
  37
  38 #ifdef CONFIG_X86_LOCAL_APIC
  39
  40 extern unsigned int apic_verbosity;
  41 extern int local_apic_timer_c2_ok;
  42
  43 extern int ioapic_force;
  44
  45 extern int disable_apic;
  46 /*
  47  * Basic functions accessing APICs.
  48  */
  49 #ifdef CONFIG_PARAVIRT
  50 #include <asm/paravirt.h>
  51 #else
  52 #define setup_boot_clock setup_boot_APIC_clock
  53 #define setup_secondary_clock setup_secondary_APIC_clock
  54 #endif
  55
  56 extern int is_vsmp_box(void);
  57 extern void xapic_wait_icr_idle(void);
  58 extern u32 safe_xapic_wait_icr_idle(void);
  59 extern u64 xapic_icr_read(void);
  60 extern void xapic_icr_write(u32, u32);
  61 extern int setup_profiling_timer(unsigned int);
  62
  63 static inline void native_apic_mem_write(u32 reg, u32 v)
  64 {
  65         volatile u32 *addr = (volatile u32 *)(APIC_BASE + reg);
  66
  67         alternative_io("movl %0, %1", "xchgl %0, %1", X86_FEATURE_11AP,
  68                        ASM_OUTPUT2("=r" (v), "=m" (*addr)),
  69                        ASM_OUTPUT2("0" (v), "m" (*addr)));
  70 }
  71
  72 static inline u32 native_apic_mem_read(u32 reg)
  73 {
  74         return *((volatile u32 *)(APIC_BASE + reg));
  75 }
  76
  77 static inline void native_apic_msr_write(u32 reg, u32 v)
  78 {
  79         if (reg == APIC_DFR || reg == APIC_ID || reg == APIC_LDR ||
  80             reg == APIC_LVR)
  81                 return;
  82
  83         wrmsr(APIC_BASE_MSR + (reg >> 4), v, 0);
  84 }
  85
  86 static inline u32 native_apic_msr_read(u32 reg)
  87 {
  88         u32 low, high;
  89
  90         if (reg == APIC_DFR)
  91                 return -1;
  92
  93         rdmsr(APIC_BASE_MSR + (reg >> 4), low, high);
  94         return low;
  95 }
  96
  97 #ifndef CONFIG_X86_32
  98 extern int x2apic, x2apic_preenabled;
  99 extern void check_x2apic(void);
 100 extern void enable_x2apic(void);
 101 extern void enable_IR_x2apic(void);
 102 extern void x2apic_icr_write(u32 low, u32 id);
 103 #endif
 104
 105 struct apic_ops {
 106         u32 (*read)(u32 reg);
 107         void (*write)(u32 reg, u32 v);
 108         u64 (*icr_read)(void);
 109         void (*icr_write)(u32 low, u32 high);
 110         void (*wait_icr_idle)(void);
 111         u32 (*safe_wait_icr_idle)(void);
 112 };
 113
 114 extern struct apic_ops *apic_ops;
 115
 116 #define apic_read (apic_ops->read)
 117 #define apic_write (apic_ops->write)
 118 #define apic_icr_read (apic_ops->icr_read)
 119 #define apic_icr_write (apic_ops->icr_write)
 120 #define apic_wait_icr_idle (apic_ops->wait_icr_idle)
 121 #define safe_apic_wait_icr_idle (apic_ops->safe_wait_icr_idle)
 122
 123 extern int get_physical_broadcast(void);
 124
 125 #ifdef CONFIG_X86_64
 126 static inline void ack_x2APIC_irq(void)
 127 {
 128         /* Docs say use 0 for future compatibility */
 129         native_apic_msr_write(APIC_EOI, 0);
 130 }
 131 #endif
 132
 133
 134 static inline void ack_APIC_irq(void)
 135 {
 136         /*
 137          * ack_APIC_irq() actually gets compiled as a single instruction
 138          * ... yummie.
 139          */
 140
 141         /* Docs say use 0 for future compatibility */
 142         apic_write(APIC_EOI, 0);
 143 }
 144
 145 extern int lapic_get_maxlvt(void);
 146 extern void clear_local_APIC(void);
 147 extern void connect_bsp_APIC(void);
 148 extern void disconnect_bsp_APIC(int virt_wire_setup);
 149 extern void disable_local_APIC(void);
 150 extern void lapic_shutdown(void);
 151 extern int verify_local_APIC(void);
 152 extern void cache_APIC_registers(void);
 153 extern void sync_Arb_IDs(void);
 154 extern void init_bsp_APIC(void);
 155 extern void setup_local_APIC(void);
 156 extern void end_local_APIC_setup(void);
 157 extern void init_apic_mappings(void);
 158 extern void setup_boot_APIC_clock(void);
 159 extern void setup_secondary_APIC_clock(void);
 160 extern int APIC_init_uniprocessor(void);
 161 extern void enable_NMI_through_LVT0(void);
 162
 163 /*
 164  * On 32bit this is mach-xxx local
 165  */
 166 #ifdef CONFIG_X86_64
 167 extern void early_init_lapic_mapping(void);
 168 extern int apic_is_clustered_box(void);
 169 #else
 170 static inline int apic_is_clustered_box(void)
 171 {
 172         return 0;
 173 }
 174 #endif
 175
 176 extern u8 setup_APIC_eilvt_mce(u8 vector, u8 msg_type, u8 mask);
 177 extern u8 setup_APIC_eilvt_ibs(u8 vector, u8 msg_type, u8 mask);
 178
 179
 180 #else /* !CONFIG_X86_LOCAL_APIC */
 181 static inline void lapic_shutdown(void) { }
 182 #define local_apic_timer_c2_ok          1
 183 static inline void init_apic_mappings(void) { }
 184
 185 #endif /* !CONFIG_X86_LOCAL_APIC */
 186
 187 #endif /* ASM_X86__APIC_H */