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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [x86/] [lib/] [msr-on-cpu.c] - Blame information for rev 3

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#include <linux/module.h>
#include <linux/preempt.h>
#include <linux/smp.h>
#include <asm/msr.h>
 
struct msr_info {
        u32 msr_no;
        u32 l, h;
        int err;
};
 
static void __rdmsr_on_cpu(void *info)
{
        struct msr_info *rv = info;
 
        rdmsr(rv->msr_no, rv->l, rv->h);
}
 
static void __rdmsr_safe_on_cpu(void *info)
{
        struct msr_info *rv = info;
 
        rv->err = rdmsr_safe(rv->msr_no, &rv->l, &rv->h);
}
 
static int _rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h, int safe)
{
        int err = 0;
        struct msr_info rv;
 
        rv.msr_no = msr_no;
        if (safe) {
                smp_call_function_single(cpu, __rdmsr_safe_on_cpu, &rv, 0, 1);
                err = rv.err;
        } else {
                smp_call_function_single(cpu, __rdmsr_on_cpu, &rv, 0, 1);
        }
        *l = rv.l;
        *h = rv.h;
 
        return err;
}
 
static void __wrmsr_on_cpu(void *info)
{
        struct msr_info *rv = info;
 
        wrmsr(rv->msr_no, rv->l, rv->h);
}
 
static void __wrmsr_safe_on_cpu(void *info)
{
        struct msr_info *rv = info;
 
        rv->err = wrmsr_safe(rv->msr_no, rv->l, rv->h);
}
 
static int _wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h, int safe)
{
        int err = 0;
        struct msr_info rv;
 
        rv.msr_no = msr_no;
        rv.l = l;
        rv.h = h;
        if (safe) {
                smp_call_function_single(cpu, __wrmsr_safe_on_cpu, &rv, 0, 1);
                err = rv.err;
        } else {
                smp_call_function_single(cpu, __wrmsr_on_cpu, &rv, 0, 1);
        }
 
        return err;
}
 
void wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
{
        _wrmsr_on_cpu(cpu, msr_no, l, h, 0);
}
 
void rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h)
{
        _rdmsr_on_cpu(cpu, msr_no, l, h, 0);
}
 
/* These "safe" variants are slower and should be used when the target MSR
   may not actually exist. */
int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
{
        return _wrmsr_on_cpu(cpu, msr_no, l, h, 1);
}
 
int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h)
{
        return _rdmsr_on_cpu(cpu, msr_no, l, h, 1);
}
 
EXPORT_SYMBOL(rdmsr_on_cpu);
EXPORT_SYMBOL(wrmsr_on_cpu);
EXPORT_SYMBOL(rdmsr_safe_on_cpu);
EXPORT_SYMBOL(wrmsr_safe_on_cpu);

Line No.	Rev	Author	Line
1	3	xianfeng	`#include <linux/module.h>`
2			`#include <linux/preempt.h>`
3			`#include <linux/smp.h>`
4			`#include <asm/msr.h>`
5
6			`struct msr_info {`
7			`u32 msr_no;`
8			`u32 l, h;`
9			`int err;`
10			`};`
11
12			`static void __rdmsr_on_cpu(void *info)`
13			`{`
14			`struct msr_info *rv = info;`
15
16			`rdmsr(rv->msr_no, rv->l, rv->h);`
17			`}`
18
19			`static void __rdmsr_safe_on_cpu(void *info)`
20			`{`
21			`struct msr_info *rv = info;`
22
23			`rv->err = rdmsr_safe(rv->msr_no, &rv->l, &rv->h);`
24			`}`
25
26			`static int _rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h, int safe)`
27			`{`
28			`int err = 0;`
29			`struct msr_info rv;`
30
31			`rv.msr_no = msr_no;`
32			`if (safe) {`
33			`smp_call_function_single(cpu, __rdmsr_safe_on_cpu, &rv, 0, 1);`
34			`err = rv.err;`
35			`} else {`
36			`smp_call_function_single(cpu, __rdmsr_on_cpu, &rv, 0, 1);`
37			`}`
38			`*l = rv.l;`
39			`*h = rv.h;`
40
41			`return err;`
42			`}`
43
44			`static void __wrmsr_on_cpu(void *info)`
45			`{`
46			`struct msr_info *rv = info;`
47
48			`wrmsr(rv->msr_no, rv->l, rv->h);`
49			`}`
50
51			`static void __wrmsr_safe_on_cpu(void *info)`
52			`{`
53			`struct msr_info *rv = info;`
54
55			`rv->err = wrmsr_safe(rv->msr_no, rv->l, rv->h);`
56			`}`
57
58			`static int _wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h, int safe)`
59			`{`
60			`int err = 0;`
61			`struct msr_info rv;`
62
63			`rv.msr_no = msr_no;`
64			`rv.l = l;`
65			`rv.h = h;`
66			`if (safe) {`
67			`smp_call_function_single(cpu, __wrmsr_safe_on_cpu, &rv, 0, 1);`
68			`err = rv.err;`
69			`} else {`
70			`smp_call_function_single(cpu, __wrmsr_on_cpu, &rv, 0, 1);`
71			`}`
72
73			`return err;`
74			`}`
75
76			`void wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)`
77			`{`
78			`_wrmsr_on_cpu(cpu, msr_no, l, h, 0);`
79			`}`
80
81			`void rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)`
82			`{`
83			`_rdmsr_on_cpu(cpu, msr_no, l, h, 0);`
84			`}`
85
86			`/* These "safe" variants are slower and should be used when the target MSR`
87			`may not actually exist. */`
88			`int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)`
89			`{`
90			`return _wrmsr_on_cpu(cpu, msr_no, l, h, 1);`
91			`}`
92
93			`int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)`
94			`{`
95			`return _rdmsr_on_cpu(cpu, msr_no, l, h, 1);`
96			`}`
97
98			`EXPORT_SYMBOL(rdmsr_on_cpu);`
99			`EXPORT_SYMBOL(wrmsr_on_cpu);`
100			`EXPORT_SYMBOL(rdmsr_safe_on_cpu);`
101			`EXPORT_SYMBOL(wrmsr_safe_on_cpu);`

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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [x86/] [lib/] [msr-on-cpu.c] - Blame information for rev 3