1d2912cb1SThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-only */ 24c6315f8SAnshuman Khandual /* 34c6315f8SAnshuman Khandual * POWER Data Stream Control Register (DSCR) 44c6315f8SAnshuman Khandual * 54c6315f8SAnshuman Khandual * This header file contains helper functions and macros 64c6315f8SAnshuman Khandual * required for all the DSCR related test cases. 74c6315f8SAnshuman Khandual * 84c6315f8SAnshuman Khandual * Copyright 2012, Anton Blanchard, IBM Corporation. 94c6315f8SAnshuman Khandual * Copyright 2015, Anshuman Khandual, IBM Corporation. 104c6315f8SAnshuman Khandual */ 114c6315f8SAnshuman Khandual #ifndef _SELFTESTS_POWERPC_DSCR_DSCR_H 124c6315f8SAnshuman Khandual #define _SELFTESTS_POWERPC_DSCR_DSCR_H 134c6315f8SAnshuman Khandual 144c6315f8SAnshuman Khandual #include <unistd.h> 154c6315f8SAnshuman Khandual #include <stdio.h> 164c6315f8SAnshuman Khandual #include <stdlib.h> 174c6315f8SAnshuman Khandual #include <string.h> 184c6315f8SAnshuman Khandual #include <fcntl.h> 194c6315f8SAnshuman Khandual #include <dirent.h> 204c6315f8SAnshuman Khandual #include <pthread.h> 214c6315f8SAnshuman Khandual #include <sched.h> 224c6315f8SAnshuman Khandual #include <sys/types.h> 234c6315f8SAnshuman Khandual #include <sys/stat.h> 244c6315f8SAnshuman Khandual #include <sys/wait.h> 254c6315f8SAnshuman Khandual 26*aecfd680SBenjamin Gray #include "reg.h" 274c6315f8SAnshuman Khandual #include "utils.h" 284c6315f8SAnshuman Khandual 294c6315f8SAnshuman Khandual #define THREADS 100 /* Max threads */ 304c6315f8SAnshuman Khandual #define COUNT 100 /* Max iterations */ 314c6315f8SAnshuman Khandual #define DSCR_MAX 16 /* Max DSCR value */ 324c6315f8SAnshuman Khandual #define LEN_MAX 100 /* Max name length */ 334c6315f8SAnshuman Khandual 344c6315f8SAnshuman Khandual #define DSCR_DEFAULT "/sys/devices/system/cpu/dscr_default" 354c6315f8SAnshuman Khandual #define CPU_PATH "/sys/devices/system/cpu/" 364c6315f8SAnshuman Khandual 374c6315f8SAnshuman Khandual #define rmb() asm volatile("lwsync":::"memory") 384c6315f8SAnshuman Khandual #define wmb() asm volatile("lwsync":::"memory") 394c6315f8SAnshuman Khandual 40564cbc87SMark Rutland #define READ_ONCE(x) (*(volatile typeof(x) *)&(x)) 414c6315f8SAnshuman Khandual 424c6315f8SAnshuman Khandual /* Prilvilege state DSCR access */ 434c6315f8SAnshuman Khandual inline unsigned long get_dscr(void) 444c6315f8SAnshuman Khandual { 45*aecfd680SBenjamin Gray return mfspr(SPRN_DSCR_PRIV); 464c6315f8SAnshuman Khandual } 474c6315f8SAnshuman Khandual 484c6315f8SAnshuman Khandual inline void set_dscr(unsigned long val) 494c6315f8SAnshuman Khandual { 50*aecfd680SBenjamin Gray mtspr(SPRN_DSCR_PRIV, val); 514c6315f8SAnshuman Khandual } 524c6315f8SAnshuman Khandual 534c6315f8SAnshuman Khandual /* Problem state DSCR access */ 544c6315f8SAnshuman Khandual inline unsigned long get_dscr_usr(void) 554c6315f8SAnshuman Khandual { 56*aecfd680SBenjamin Gray return mfspr(SPRN_DSCR); 574c6315f8SAnshuman Khandual } 584c6315f8SAnshuman Khandual 594c6315f8SAnshuman Khandual inline void set_dscr_usr(unsigned long val) 604c6315f8SAnshuman Khandual { 61*aecfd680SBenjamin Gray mtspr(SPRN_DSCR, val); 624c6315f8SAnshuman Khandual } 634c6315f8SAnshuman Khandual 644c6315f8SAnshuman Khandual /* Default DSCR access */ 654c6315f8SAnshuman Khandual unsigned long get_default_dscr(void) 664c6315f8SAnshuman Khandual { 674c6315f8SAnshuman Khandual int fd = -1, ret; 684c6315f8SAnshuman Khandual char buf[16]; 694c6315f8SAnshuman Khandual unsigned long val; 704c6315f8SAnshuman Khandual 714c6315f8SAnshuman Khandual if (fd == -1) { 724c6315f8SAnshuman Khandual fd = open(DSCR_DEFAULT, O_RDONLY); 734c6315f8SAnshuman Khandual if (fd == -1) { 744c6315f8SAnshuman Khandual perror("open() failed"); 754c6315f8SAnshuman Khandual exit(1); 764c6315f8SAnshuman Khandual } 774c6315f8SAnshuman Khandual } 784c6315f8SAnshuman Khandual memset(buf, 0, sizeof(buf)); 794c6315f8SAnshuman Khandual lseek(fd, 0, SEEK_SET); 804c6315f8SAnshuman Khandual ret = read(fd, buf, sizeof(buf)); 814c6315f8SAnshuman Khandual if (ret == -1) { 824c6315f8SAnshuman Khandual perror("read() failed"); 834c6315f8SAnshuman Khandual exit(1); 844c6315f8SAnshuman Khandual } 854c6315f8SAnshuman Khandual sscanf(buf, "%lx", &val); 864c6315f8SAnshuman Khandual close(fd); 874c6315f8SAnshuman Khandual return val; 884c6315f8SAnshuman Khandual } 894c6315f8SAnshuman Khandual 904c6315f8SAnshuman Khandual void set_default_dscr(unsigned long val) 914c6315f8SAnshuman Khandual { 924c6315f8SAnshuman Khandual int fd = -1, ret; 934c6315f8SAnshuman Khandual char buf[16]; 944c6315f8SAnshuman Khandual 954c6315f8SAnshuman Khandual if (fd == -1) { 964c6315f8SAnshuman Khandual fd = open(DSCR_DEFAULT, O_RDWR); 974c6315f8SAnshuman Khandual if (fd == -1) { 984c6315f8SAnshuman Khandual perror("open() failed"); 994c6315f8SAnshuman Khandual exit(1); 1004c6315f8SAnshuman Khandual } 1014c6315f8SAnshuman Khandual } 1024c6315f8SAnshuman Khandual sprintf(buf, "%lx\n", val); 1034c6315f8SAnshuman Khandual ret = write(fd, buf, strlen(buf)); 1044c6315f8SAnshuman Khandual if (ret == -1) { 1054c6315f8SAnshuman Khandual perror("write() failed"); 1064c6315f8SAnshuman Khandual exit(1); 1074c6315f8SAnshuman Khandual } 1084c6315f8SAnshuman Khandual close(fd); 1094c6315f8SAnshuman Khandual } 1104c6315f8SAnshuman Khandual 1114c6315f8SAnshuman Khandual double uniform_deviate(int seed) 1124c6315f8SAnshuman Khandual { 1134c6315f8SAnshuman Khandual return seed * (1.0 / (RAND_MAX + 1.0)); 1144c6315f8SAnshuman Khandual } 1154c6315f8SAnshuman Khandual #endif /* _SELFTESTS_POWERPC_DSCR_DSCR_H */ 116