tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef __ASM_APIC_H
2#define __ASM_APIC_H
3
4#include <linux/pm.h>
5#include <asm/fixmap.h>
6#include <asm/apicdef.h>
7#include <asm/processor.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
33extern void generic_apic_probe(void);
34
35#ifdef CONFIG_X86_LOCAL_APIC
36
37/*
38 * Basic functions accessing APICs.
39 */
40#ifdef CONFIG_PARAVIRT
41#include <asm/paravirt.h>
42#else
43#define apic_write native_apic_write
44#define apic_write_atomic native_apic_write_atomic
45#define apic_read native_apic_read
46#define setup_boot_clock setup_boot_APIC_clock
47#define setup_secondary_clock setup_secondary_APIC_clock
48#endif
49
50static __inline fastcall void native_apic_write(unsigned long reg,
51 unsigned long v)
52{
53 *((volatile unsigned long *)(APIC_BASE+reg)) = v;
54}
55
56static __inline fastcall void native_apic_write_atomic(unsigned long reg,
57 unsigned long v)
58{
59 xchg((volatile unsigned long *)(APIC_BASE+reg), v);
60}
61
62static __inline fastcall unsigned long native_apic_read(unsigned long reg)
63{
64 return *((volatile unsigned long *)(APIC_BASE+reg));
65}
66
67static __inline__ void apic_wait_icr_idle(void)
68{
69 while ( apic_read( APIC_ICR ) & APIC_ICR_BUSY )
70 cpu_relax();
71}
72
73int get_physical_broadcast(void);
74
75#ifdef CONFIG_X86_GOOD_APIC
76# define FORCE_READ_AROUND_WRITE 0
77# define apic_read_around(x)
78# define apic_write_around(x,y) apic_write((x),(y))
79#else
80# define FORCE_READ_AROUND_WRITE 1
81# define apic_read_around(x) apic_read(x)
82# define apic_write_around(x,y) apic_write_atomic((x),(y))
83#endif
84
85static inline void ack_APIC_irq(void)
86{
87 /*
88 * ack_APIC_irq() actually gets compiled as a single instruction:
89 * - a single rmw on Pentium/82489DX
90 * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
91 * ... yummie.
92 */
93
94 /* Docs say use 0 for future compatibility */
95 apic_write_around(APIC_EOI, 0);
96}
97
98extern int lapic_get_maxlvt(void);
99extern void clear_local_APIC(void);
100extern void connect_bsp_APIC (void);
101extern void disconnect_bsp_APIC (int virt_wire_setup);
102extern void disable_local_APIC (void);
103extern void lapic_shutdown (void);
104extern int verify_local_APIC (void);
105extern void cache_APIC_registers (void);
106extern void sync_Arb_IDs (void);
107extern void init_bsp_APIC (void);
108extern void setup_local_APIC (void);
109extern void init_apic_mappings (void);
110extern void smp_local_timer_interrupt (void);
111extern void setup_boot_APIC_clock (void);
112extern void setup_secondary_APIC_clock (void);
113extern int APIC_init_uniprocessor (void);
114
115extern void enable_NMI_through_LVT0 (void * dummy);
116
117#define ARCH_APICTIMER_STOPS_ON_C3 1
118
119extern int timer_over_8254;
120extern int local_apic_timer_c2_ok;
121
122#else /* !CONFIG_X86_LOCAL_APIC */
123static inline void lapic_shutdown(void) { }
124
125#endif /* !CONFIG_X86_LOCAL_APIC */
126
127#endif /* __ASM_APIC_H */