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11#ifndef _SELFTESTS_POWERPC_DSCR_DSCR_H
12#define _SELFTESTS_POWERPC_DSCR_DSCR_H
13
14#include <unistd.h>
15#include <stdio.h>
16#include <stdlib.h>
17#include <string.h>
18#include <fcntl.h>
19#include <dirent.h>
20#include <pthread.h>
21#include <sched.h>
22#include <sys/types.h>
23#include <sys/stat.h>
24#include <sys/wait.h>
25
26#include "utils.h"
27
28#define THREADS 100
29#define COUNT 100
30#define DSCR_MAX 16
31#define LEN_MAX 100
32
33#define DSCR_DEFAULT "/sys/devices/system/cpu/dscr_default"
34#define CPU_PATH "/sys/devices/system/cpu/"
35
36#define rmb() asm volatile("lwsync":::"memory")
37#define wmb() asm volatile("lwsync":::"memory")
38
39#define READ_ONCE(x) (*(volatile typeof(x) *)&(x))
40
41
42inline unsigned long get_dscr(void)
43{
44 unsigned long ret;
45
46 asm volatile("mfspr %0,%1" : "=r" (ret) : "i" (SPRN_DSCR_PRIV));
47
48 return ret;
49}
50
51inline void set_dscr(unsigned long val)
52{
53 asm volatile("mtspr %1,%0" : : "r" (val), "i" (SPRN_DSCR_PRIV));
54}
55
56
57inline unsigned long get_dscr_usr(void)
58{
59 unsigned long ret;
60
61 asm volatile("mfspr %0,%1" : "=r" (ret) : "i" (SPRN_DSCR));
62
63 return ret;
64}
65
66inline void set_dscr_usr(unsigned long val)
67{
68 asm volatile("mtspr %1,%0" : : "r" (val), "i" (SPRN_DSCR));
69}
70
71
72unsigned long get_default_dscr(void)
73{
74 int fd = -1, ret;
75 char buf[16];
76 unsigned long val;
77
78 if (fd == -1) {
79 fd = open(DSCR_DEFAULT, O_RDONLY);
80 if (fd == -1) {
81 perror("open() failed");
82 exit(1);
83 }
84 }
85 memset(buf, 0, sizeof(buf));
86 lseek(fd, 0, SEEK_SET);
87 ret = read(fd, buf, sizeof(buf));
88 if (ret == -1) {
89 perror("read() failed");
90 exit(1);
91 }
92 sscanf(buf, "%lx", &val);
93 close(fd);
94 return val;
95}
96
97void set_default_dscr(unsigned long val)
98{
99 int fd = -1, ret;
100 char buf[16];
101
102 if (fd == -1) {
103 fd = open(DSCR_DEFAULT, O_RDWR);
104 if (fd == -1) {
105 perror("open() failed");
106 exit(1);
107 }
108 }
109 sprintf(buf, "%lx\n", val);
110 ret = write(fd, buf, strlen(buf));
111 if (ret == -1) {
112 perror("write() failed");
113 exit(1);
114 }
115 close(fd);
116}
117
118double uniform_deviate(int seed)
119{
120 return seed * (1.0 / (RAND_MAX + 1.0));
121}
122#endif
123