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
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
#include <linux/config.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/threads.h>
#include <linux/time.h>
#include <linux/timex.h>
#include <linux/sched.h>
#include <asm/atomic.h>
#include <asm/processor.h>
#include <asm/system.h>
#include <asm/hardirq.h>
#ifdef CONFIG_SGI_IP27
#include <asm/sn/arch.h>
#include <asm/sn/intr.h>
#include <asm/sn/addrs.h>
#include <asm/sn/agent.h>
#define DOACTION 0xab
static void sendintr(int destid, unsigned char status)
{
int level;
#if (CPUS_PER_NODE == 2)
/*
* CPU slice A gets level CPU_ACTION_A
* CPU slice B gets level CPU_ACTION_B
*/
if (status == DOACTION)
level = CPU_ACTION_A + cputoslice(destid);
else /* DOTLBACTION */
level = N_INTPEND_BITS + TLB_INTR_A + cputoslice(destid);
/*
* Convert the compact hub number to the NASID to get the correct
* part of the address space. Then set the interrupt bit associated
* with the CPU we want to send the interrupt to.
*/
REMOTE_HUB_SEND_INTR(COMPACT_TO_NASID_NODEID(cputocnode(destid)), level);
#else
<< Bomb! Must redefine this for more than 2 CPUS. >>
#endif
}
#endif /* CONFIG_SGI_IP27 */
/* The 'big kernel lock' */
spinlock_t kernel_flag = SPIN_LOCK_UNLOCKED;
int smp_threads_ready = 0; /* Not used */
atomic_t smp_commenced = ATOMIC_INIT(0);
struct cpuinfo_mips cpu_data[NR_CPUS];
int smp_num_cpus; /* Number that came online. */
int __cpu_number_map[NR_CPUS];
int __cpu_logical_map[NR_CPUS];
cycles_t cacheflush_time;
static void smp_tune_scheduling (void)
{
}
void __init smp_boot_cpus(void)
{
global_irq_holder = 0;
current->processor = 0;
init_idle();
smp_tune_scheduling();
smp_num_cpus = 1; /* for now */
allowboot();
}
void __init smp_commence(void)
{
wmb();
atomic_set(&smp_commenced,1);
}
static void stop_this_cpu(void *dummy)
{
/*
* Remove this CPU
*/
for (;;);
}
void smp_send_stop(void)
{
smp_call_function(stop_this_cpu, NULL, 1, 0);
smp_num_cpus = 1;
}
/*
* this function sends a 'reschedule' IPI to another CPU.
* it goes straight through and wastes no time serializing
* anything. Worst case is that we lose a reschedule ...
*/
void smp_send_reschedule(int cpu)
{
panic("smp_send_reschedule\n");
}
/* Not really SMP stuff ... */
int setup_profiling_timer(unsigned int multiplier)
{
}
/*
* Run a function on all other CPUs.
* <func> The function to run. This must be fast and non-blocking.
* <info> An arbitrary pointer to pass to the function.
* <retry> If true, keep retrying until ready.
* <wait> If true, wait until function has completed on other CPUs.
* [RETURNS] 0 on success, else a negative status code.
*
* Does not return until remote CPUs are nearly ready to execute <func>
* or are or have executed.
*/
int
smp_call_function (void (*func) (void *info), void *info, int retry, int wait)
{
/* XXX - kinda important ;-) */
panic("smp_call_function\n");
}
void flush_tlb_others (unsigned long cpumask, struct mm_struct *mm,
unsigned long va)
{
panic("flush_tlb_others\n");
}
|
