LXR linux/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#include <asm/fixmap.h>
   7#include <asm/apicdef.h>
   8#include <asm/processor.h>
   9#include <asm/system.h>
  10
  11#define ARCH_APICTIMER_STOPS_ON_C3      1
  12
  13#define Dprintk(x...)
  14
  15/*
  16 * Debugging macros
  17 */
  18#define APIC_QUIET   0
  19#define APIC_VERBOSE 1
  20#define APIC_DEBUG   2
  21
  22/*
  23 * Define the default level of output to be very little
  24 * This can be turned up by using apic=verbose for more
  25 * information and apic=debug for _lots_ of information.
  26 * apic_verbosity is defined in apic.c
  27 */
  28#define apic_printk(v, s, a...) do {       \
  29                if ((v) <= apic_verbosity) \
  30                        printk(s, ##a);    \
  31        } while (0)
  32
  33
  34extern void generic_apic_probe(void);
  35
  36#ifdef CONFIG_X86_LOCAL_APIC
  37
  38extern int apic_verbosity;
  39extern int timer_over_8254;
  40extern int local_apic_timer_c2_ok;
  41extern int local_apic_timer_disabled;
  42
  43extern int apic_runs_main_timer;
  44extern int ioapic_force;
  45extern int disable_apic;
  46extern int disable_apic_timer;
  47extern unsigned boot_cpu_id;
  48
  49/*
  50 * Basic functions accessing APICs.
  51 */
  52#ifdef CONFIG_PARAVIRT
  53#include <asm/paravirt.h>
  54#else
  55#define apic_write native_apic_write
  56#define apic_write_atomic native_apic_write_atomic
  57#define apic_read native_apic_read
  58#define setup_boot_clock setup_boot_APIC_clock
  59#define setup_secondary_clock setup_secondary_APIC_clock
  60#endif
  61
  62static inline void native_apic_write(unsigned long reg, u32 v)
  63{
  64        *((volatile u32 *)(APIC_BASE + reg)) = v;
  65}
  66
  67static inline void native_apic_write_atomic(unsigned long reg, u32 v)
  68{
  69        (void) xchg((u32*)(APIC_BASE + reg), v);
  70}
  71
  72static inline u32 native_apic_read(unsigned long reg)
  73{
  74        return *((volatile u32 *)(APIC_BASE + reg));
  75}
  76
  77extern void apic_wait_icr_idle(void);
  78extern u32 safe_apic_wait_icr_idle(void);
  79extern int get_physical_broadcast(void);
  80
  81#ifdef CONFIG_X86_GOOD_APIC
  82# define FORCE_READ_AROUND_WRITE 0
  83# define apic_read_around(x)
  84# define apic_write_around(x, y) apic_write((x), (y))
  85#else
  86# define FORCE_READ_AROUND_WRITE 1
  87# define apic_read_around(x) apic_read(x)
  88# define apic_write_around(x, y) apic_write_atomic((x), (y))
  89#endif
  90
  91static inline void ack_APIC_irq(void)
  92{
  93        /*
  94         * ack_APIC_irq() actually gets compiled as a single instruction:
  95         * - a single rmw on Pentium/82489DX
  96         * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
  97         * ... yummie.
  98         */
  99
 100        /* Docs say use 0 for future compatibility */
 101        apic_write_around(APIC_EOI, 0);
 102}
 103
 104extern int lapic_get_maxlvt(void);
 105extern void clear_local_APIC(void);
 106extern void connect_bsp_APIC(void);
 107extern void disconnect_bsp_APIC(int virt_wire_setup);
 108extern void disable_local_APIC(void);
 109extern void lapic_shutdown(void);
 110extern int verify_local_APIC(void);
 111extern void cache_APIC_registers(void);
 112extern void sync_Arb_IDs(void);
 113extern void init_bsp_APIC(void);
 114extern void setup_local_APIC(void);
 115extern void end_local_APIC_setup(void);
 116extern void init_apic_mappings(void);
 117extern void setup_boot_APIC_clock(void);
 118extern void setup_secondary_APIC_clock(void);
 119extern int APIC_init_uniprocessor(void);
 120extern void enable_NMI_through_LVT0(void);
 121
 122/*
 123 * On 32bit this is mach-xxx local
 124 */
 125#ifdef CONFIG_X86_64
 126extern void setup_apic_routing(void);
 127#endif
 128
 129extern u8 setup_APIC_eilvt_mce(u8 vector, u8 msg_type, u8 mask);
 130extern u8 setup_APIC_eilvt_ibs(u8 vector, u8 msg_type, u8 mask);
 131
 132extern int apic_is_clustered_box(void);
 133
 134#else /* !CONFIG_X86_LOCAL_APIC */
 135static inline void lapic_shutdown(void) { }
 136#define local_apic_timer_c2_ok          1
 137
 138#endif /* !CONFIG_X86_LOCAL_APIC */
 139
 140#endif /* __ASM_APIC_H */
 141