tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1#ifndef __ASM_APIC_H
2#define __ASM_APIC_H
3
4#include <linux/config.h>
5#include <linux/pm.h>
6#include <asm/fixmap.h>
7#include <asm/apicdef.h>
8#include <asm/system.h>
9
10#define Dprintk(x...)
11
12/*
13 * Debugging macros
14 */
15#define APIC_QUIET 0
16#define APIC_VERBOSE 1
17#define APIC_DEBUG 2
18
19extern int apic_verbosity;
20
21/*
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
26 */
27#define apic_printk(v, s, a...) do { \
28 if ((v) <= apic_verbosity) \
29 printk(s, ##a); \
30 } while (0)
31
32#ifdef CONFIG_X86_LOCAL_APIC
33
34struct pt_regs;
35
36/*
37 * Basic functions accessing APICs.
38 */
39
40static __inline void apic_write(unsigned long reg, unsigned int v)
41{
42 *((volatile unsigned int *)(APIC_BASE+reg)) = v;
43}
44
45static __inline void apic_write_atomic(unsigned long reg, unsigned int v)
46{
47 xchg((volatile unsigned int *)(APIC_BASE+reg), v);
48}
49
50static __inline unsigned int apic_read(unsigned long reg)
51{
52 return *((volatile unsigned int *)(APIC_BASE+reg));
53}
54
55static __inline__ void apic_wait_icr_idle(void)
56{
57 while ( apic_read( APIC_ICR ) & APIC_ICR_BUSY );
58}
59
60#define FORCE_READ_AROUND_WRITE 0
61#define apic_read_around(x)
62#define apic_write_around(x,y) apic_write((x),(y))
63
64static inline void ack_APIC_irq(void)
65{
66 /*
67 * ack_APIC_irq() actually gets compiled as a single instruction:
68 * - a single rmw on Pentium/82489DX
69 * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
70 * ... yummie.
71 */
72
73 /* Docs say use 0 for future compatibility */
74 apic_write_around(APIC_EOI, 0);
75}
76
77extern int get_maxlvt (void);
78extern void clear_local_APIC (void);
79extern void connect_bsp_APIC (void);
80extern void disconnect_bsp_APIC (int virt_wire_setup);
81extern void disable_local_APIC (void);
82extern int verify_local_APIC (void);
83extern void cache_APIC_registers (void);
84extern void sync_Arb_IDs (void);
85extern void init_bsp_APIC (void);
86extern void setup_local_APIC (void);
87extern void init_apic_mappings (void);
88extern void smp_local_timer_interrupt (struct pt_regs * regs);
89extern void setup_boot_APIC_clock (void);
90extern void setup_secondary_APIC_clock (void);
91extern void setup_apic_nmi_watchdog (void);
92extern int reserve_lapic_nmi(void);
93extern void release_lapic_nmi(void);
94extern void disable_timer_nmi_watchdog(void);
95extern void enable_timer_nmi_watchdog(void);
96extern void nmi_watchdog_tick (struct pt_regs * regs, unsigned reason);
97extern int APIC_init_uniprocessor (void);
98extern void disable_APIC_timer(void);
99extern void enable_APIC_timer(void);
100extern void clustered_apic_check(void);
101
102extern void nmi_watchdog_default(void);
103extern int setup_nmi_watchdog(char *);
104
105extern unsigned int nmi_watchdog;
106#define NMI_DEFAULT -1
107#define NMI_NONE 0
108#define NMI_IO_APIC 1
109#define NMI_LOCAL_APIC 2
110#define NMI_INVALID 3
111
112extern int disable_timer_pin_1;
113
114extern void setup_threshold_lvt(unsigned long lvt_off);
115
116#endif /* CONFIG_X86_LOCAL_APIC */
117
118extern unsigned boot_cpu_id;
119
120#endif /* __ASM_APIC_H */