blob: a6ea5c17d293ec1527c9c37fe1f9cfc56436734f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
/*
* SMP Support
*
* Copyright (C) 1999 VA Linux Systems
* Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
*/
#ifndef _ASM_IA64_SMP_H
#define _ASM_IA64_SMP_H
#include <linux/config.h>
#include <linux/init.h>
#include <linux/threads.h>
#include <linux/kernel.h>
#include <asm/ptrace.h>
#include <asm/spinlock.h>
#include <asm/io.h>
#define IPI_DEFAULT_BASE_ADDR 0xfee00000
#define XTP_OFFSET 0x1e0008
#define smp_processor_id() (current->processor)
extern unsigned long cpu_present_map;
extern unsigned long cpu_online_map;
extern unsigned long ipi_base_addr;
extern int bootstrap_processor;
extern volatile int __cpu_number_map[NR_CPUS];
extern volatile int __cpu_logical_map[NR_CPUS];
#define cpu_number_map(i) __cpu_number_map[i]
#define cpu_logical_map(i) __cpu_logical_map[i]
#if defined(CONFIG_KDB)
extern volatile unsigned long smp_kdb_wait;
#endif /* CONFIG_KDB */
extern unsigned long ap_wakeup_vector;
/*
* XTP control functions:
* min_xtp : route all interrupts to this CPU
* normal_xtp: nominal XTP value
* raise_xtp : Route all interrupts away from this CPU
* max_xtp : never deliver interrupts to this CPU.
*/
/*
* This turns off XTP based interrupt routing. There is a bug in the handling of
* IRQ_INPROGRESS when the same vector appears on more than one CPU.
*/
extern int use_xtp;
extern __inline void
min_xtp(void)
{
if (use_xtp)
writeb(0x80, ipi_base_addr | XTP_OFFSET); /* XTP to min */
}
extern __inline void
normal_xtp(void)
{
if (use_xtp)
writeb(0x8e, ipi_base_addr | XTP_OFFSET); /* XTP normal */
}
extern __inline void
max_xtp(void)
{
if (use_xtp)
writeb(0x8f, ipi_base_addr | XTP_OFFSET); /* Set XTP to max... */
}
extern __inline unsigned int
hard_smp_processor_id(void)
{
struct {
unsigned long reserved : 16;
unsigned long eid : 8;
unsigned long id : 8;
unsigned long ignored : 32;
} lid;
__asm__ __volatile__ ("mov %0=cr.lid" : "=r" (lid));
/*
* Damn. IA64 CPU ID's are 16 bits long, Linux expect the hard id to be
* in the range 0..31. So, return the low-order bits of the bus-local ID
* only and hope it's less than 32. This needs to be fixed...
*/
return (lid.id & 0x0f);
}
#define NO_PROC_ID 0xffffffff
#define PROC_CHANGE_PENALTY 20
extern void __init init_smp_config (void);
extern void smp_do_timer (struct pt_regs *regs);
#endif /* _ASM_IA64_SMP_H */
|
