You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
123 lines
2.5 KiB
123 lines
2.5 KiB
4 months ago
|
/* SPDX-License-Identifier: GPL-2.0-only */
|
||
|
|
/*
|
||
|
|
* POWER Data Stream Control Register (DSCR)
|
||
|
|
*
|
||
|
|
* This header file contains helper functions and macros
|
||
|
|
* required for all the DSCR related test cases.
|
||
|
|
*
|
||
|
|
* Copyright 2012, Anton Blanchard, IBM Corporation.
|
||
|
|
* Copyright 2015, Anshuman Khandual, IBM Corporation.
|
||
|
|
*/
|
||
|
|
#ifndef _SELFTESTS_POWERPC_DSCR_DSCR_H
|
||
|
|
#define _SELFTESTS_POWERPC_DSCR_DSCR_H
|
||
|
|
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include <dirent.h>
|
||
|
|
#include <pthread.h>
|
||
|
|
#include <sched.h>
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <sys/stat.h>
|
||
|
|
#include <sys/wait.h>
|
||
|
|
|
||
|
|
#include "utils.h"
|
||
|
|
|
||
|
|
#define THREADS 100 /* Max threads */
|
||
|
|
#define COUNT 100 /* Max iterations */
|
||
|
|
#define DSCR_MAX 16 /* Max DSCR value */
|
||
|
|
#define LEN_MAX 100 /* Max name length */
|
||
|
|
|
||
|
|
#define DSCR_DEFAULT "/sys/devices/system/cpu/dscr_default"
|
||
|
|
#define CPU_PATH "/sys/devices/system/cpu/"
|
||
|
|
|
||
|
|
#define rmb() asm volatile("lwsync":::"memory")
|
||
|
|
#define wmb() asm volatile("lwsync":::"memory")
|
||
|
|
|
||
|
|
#define READ_ONCE(x) (*(volatile typeof(x) *)&(x))
|
||
|
|
|
||
|
|
/* Prilvilege state DSCR access */
|
||
|
|
inline unsigned long get_dscr(void)
|
||
|
|
{
|
||
|
|
unsigned long ret;
|
||
|
|
|
||
|
|
asm volatile("mfspr %0,%1" : "=r" (ret) : "i" (SPRN_DSCR_PRIV));
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
inline void set_dscr(unsigned long val)
|
||
|
|
{
|
||
|
|
asm volatile("mtspr %1,%0" : : "r" (val), "i" (SPRN_DSCR_PRIV));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Problem state DSCR access */
|
||
|
|
inline unsigned long get_dscr_usr(void)
|
||
|
|
{
|
||
|
|
unsigned long ret;
|
||
|
|
|
||
|
|
asm volatile("mfspr %0,%1" : "=r" (ret) : "i" (SPRN_DSCR));
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
inline void set_dscr_usr(unsigned long val)
|
||
|
|
{
|
||
|
|
asm volatile("mtspr %1,%0" : : "r" (val), "i" (SPRN_DSCR));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Default DSCR access */
|
||
|
|
unsigned long get_default_dscr(void)
|
||
|
|
{
|
||
|
|
int fd = -1, ret;
|
||
|
|
char buf[16];
|
||
|
|
unsigned long val;
|
||
|
|
|
||
|
|
if (fd == -1) {
|
||
|
|
fd = open(DSCR_DEFAULT, O_RDONLY);
|
||
|
|
if (fd == -1) {
|
||
|
|
perror("open() failed");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
memset(buf, 0, sizeof(buf));
|
||
|
|
lseek(fd, 0, SEEK_SET);
|
||
|
|
ret = read(fd, buf, sizeof(buf));
|
||
|
|
if (ret == -1) {
|
||
|
|
perror("read() failed");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
sscanf(buf, "%lx", &val);
|
||
|
|
close(fd);
|
||
|
|
return val;
|
||
|
|
}
|
||
|
|
|
||
|
|
void set_default_dscr(unsigned long val)
|
||
|
|
{
|
||
|
|
int fd = -1, ret;
|
||
|
|
char buf[16];
|
||
|
|
|
||
|
|
if (fd == -1) {
|
||
|
|
fd = open(DSCR_DEFAULT, O_RDWR);
|
||
|
|
if (fd == -1) {
|
||
|
|
perror("open() failed");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
sprintf(buf, "%lx\n", val);
|
||
|
|
ret = write(fd, buf, strlen(buf));
|
||
|
|
if (ret == -1) {
|
||
|
|
perror("write() failed");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
close(fd);
|
||
|
|
}
|
||
|
|
|
||
|
|
double uniform_deviate(int seed)
|
||
|
|
{
|
||
|
|
return seed * (1.0 / (RAND_MAX + 1.0));
|
||
|
|
}
|
||
|
|
#endif /* _SELFTESTS_POWERPC_DSCR_DSCR_H */
|