litmus-rt.git - The LITMUS^RT kernel.

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author	Darrick J. Wong <djwong@us.ibm.com>	2008-11-12 16:27:03 -0500
committer	Linus Torvalds <torvalds@linux-foundation.org>	2008-11-12 20:17:17 -0500
commit	c0b4e3ab0c769913438aeb078535ff117eeba5fb (patch)
tree	aef089b13f7850971025851dedd958f10bdf928a /include/linux/mbcache.h
parent	455fbdd376c3ed3a5be8c039348896fdd87e9930 (diff)

adt7462: new hwmon driver

New driver to play with. As Jean mentioned a couple of years ago, this chip is a beast with odd combinations of 8 fans, 4 temperatures, and 13 voltage sensors. This driver has been tested on an IntelliStation Z30. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Diffstat (limited to 'include/linux/mbcache.h')

0 files changed, 0 insertions, 0 deletions

/* * recordmcount.c: construct a table of the locations of calls to 'mcount' * so that ftrace can find them quickly. * Copyright 2009 John F. Reiser <jreiser@BitWagon.com>. All rights reserved. * Licensed under the GNU General Public License, version 2 (GPLv2). * * Restructured to fit Linux format, as well as other updates: * Copyright 2010 Steven Rostedt <srostedt@redhat.com>, Red Hat Inc. */ /* * Strategy: alter the .o file in-place. * * Append a new STRTAB that has the new section names, followed by a new array * ElfXX_Shdr[] that has the new section headers, followed by the section * contents for __mcount_loc and its relocations. The old shstrtab strings, * and the old ElfXX_Shdr[] array, remain as "garbage" (commonly, a couple * kilobytes.) Subsequent processing by /bin/ld (or the kernel module loader) * will ignore the garbage regions, because they are not designated by the * new .e_shoff nor the new ElfXX_Shdr[]. [In order to remove the garbage, * then use "ld -r" to create a new file that omits the garbage.] */ #include <sys/types.h> #include <sys/mman.h> #include <sys/stat.h> #include <getopt.h> #include <elf.h> #include <fcntl.h> #include <setjmp.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> /* * glibc synced up and added the metag number but didn't add the relocations. * Work around this in a crude manner for now. */ #ifndef EM_METAG #define EM_METAG 174 #endif #ifndef R_METAG_ADDR32 #define R_METAG_ADDR32 2 #endif #ifndef R_METAG_NONE #define R_METAG_NONE 3 #endif #ifndef EM_AARCH64 #define EM_AARCH64 183 #define R_AARCH64_NONE 0 #define R_AARCH64_ABS64 257 #endif static int fd_map; /* File descriptor for file being modified. */ static int mmap_failed; /* Boolean flag. */ static char gpfx; /* prefix for global symbol name (sometimes '_') */ static struct stat sb; /* Remember .st_size, etc. */ static jmp_buf jmpenv; /* setjmp/longjmp per-file error escape */ static const char *altmcount; /* alternate mcount symbol name */ static int warn_on_notrace_sect; /* warn when section has mcount not being recorded */ static void *file_map; /* pointer of the mapped file */ static void *file_end; /* pointer to the end of the mapped file */ static int file_updated; /* flag to state file was changed */ static void *file_ptr; /* current file pointer location */ static void *file_append; /* added to the end of the file */ static size_t file_append_size; /* how much is added to end of file */ /* setjmp() return values */ enum { SJ_SETJMP = 0, /* hardwired first return */ SJ_FAIL, SJ_SUCCEED }; /* Per-file resource cleanup when multiple files. */ static void cleanup(void) { if (!mmap_failed) munmap(file_map, sb.st_size); else free(file_map); file_map = NULL; free(file_append); file_append = NULL; file_append_size = 0; file_updated = 0; } static void __attribute__((noreturn)) fail_file(void) { cleanup(); longjmp(jmpenv, SJ_FAIL); } static void __attribute__((noreturn)) succeed_file(void) { cleanup(); longjmp(jmpenv, SJ_SUCCEED); } /* ulseek, uread, ...: Check return value for errors. */ static off_t ulseek(int const fd, off_t const offset, int const whence) { switch (whence) { case SEEK_SET: file_ptr = file_map + offset; break; case SEEK_CUR: file_ptr += offset; break; case SEEK_END: file_ptr = file_map + (sb.st_size - offset); break; } if (file_ptr < file_map) { fprintf(stderr, "lseek: seek before file\n"); fail_file(); } return file_ptr - file_map; } static size_t uread(int const fd, void *const buf, size_t const count) { size_t const n = read(fd, buf, count); if (n != count) { perror("read"); fail_file(); } return n; } static size_t uwrite(int const fd, void const *const buf, size_t const count) { size_t cnt = count; off_t idx = 0; file_updated = 1; if (file_ptr + count >= file_end) { off_t aoffset = (file_ptr + count) - file_end; if (aoffset > file_append_size) { file_append = realloc(file_append, aoffset); file_append_size = aoffset; } if (!file_append) { perror("write"); fail_file(); } if (file_ptr < file_end) { cnt = file_end - file_ptr; } else { cnt = 0; idx = aoffset - count; } } if (cnt) memcpy(file_ptr, buf, cnt); if (cnt < count) memcpy(file_append + idx, buf + cnt, count - cnt); file_ptr += count; return count; } static void * umalloc(size_t size) { void *const addr = malloc(size); if (addr == 0) { fprintf(stderr, "malloc failed: %zu bytes\n", size); fail_file(); } return addr; } static unsigned char ideal_nop5_x86_64[5] = { 0x0f, 0x1f, 0x44, 0x00, 0x00 }; static unsigned char ideal_nop5_x86_32[5] = { 0x3e, 0x8d, 0x74, 0x26, 0x00 }; static unsigned char *ideal_nop; static char rel_type_nop; static int (*make_nop)(void *map, size_t const offset); static int make_nop_x86(void *map, size_t const offset) { uint32_t *ptr; unsigned char *op; /* Confirm we have 0xe8 0x0 0x0 0x0 0x0 */ ptr = map + offset; if (*ptr != 0) return -1; op = map + offset - 1; if (*op != 0xe8) return -1; /* convert to nop */ ulseek(fd_map, offset - 1, SEEK_SET); uwrite(fd_map, ideal_nop, 5); return 0; } static unsigned char ideal_nop4_arm_le[4] = { 0x00, 0x00, 0xa0, 0xe1 }; /* mov r0, r0 */ static unsigned char ideal_nop4_arm_be[4] = { 0xe1, 0xa0, 0x00, 0x00 }; /* mov r0, r0 */ static unsigned char *ideal_nop4_arm; static unsigned char bl_mcount_arm_le[4] = { 0xfe, 0xff, 0xff, 0xeb }; /* bl */ static unsigned char bl_mcount_arm_be[4] = { 0xeb, 0xff, 0xff, 0xfe }; /* bl */ static unsigned char *bl_mcount_arm; static unsigned char push_arm_le[4] = { 0x04, 0xe0, 0x2d, 0xe5 }; /* push {lr} */ static unsigned char push_arm_be[4] = { 0xe5, 0x2d, 0xe0, 0x04 }; /* push {lr} */ static unsigned char *push_arm; static unsigned char ideal_nop2_thumb_le[2] = { 0x00, 0xbf }; /* nop */ static unsigned char ideal_nop2_thumb_be[2] = { 0xbf, 0x00 }; /* nop */ static unsigned char *ideal_nop2_thumb; static unsigned char push_bl_mcount_thumb_le[6] = { 0x00, 0xb5, 0xff, 0xf7, 0xfe, 0xff }; /* push {lr}, bl */ static unsigned char push_bl_mcount_thumb_be[6] = { 0xb5, 0x00, 0xf7, 0xff, 0xff, 0xfe }; /* push {lr}, bl */ static unsigned char *push_bl_mcount_thumb; static int make_nop_arm(void *map, size_t const offset) { char *ptr; int cnt = 1; int nop_size; size_t off = offset; ptr = map + offset; if (memcmp(ptr, bl_mcount_arm, 4) == 0) { if (memcmp(ptr - 4, push_arm, 4) == 0) { off -= 4; cnt = 2; } ideal_nop = ideal_nop4_arm; nop_size = 4; } else if (memcmp(ptr - 2, push_bl_mcount_thumb, 6) == 0) { cnt = 3; nop_size = 2; off -= 2; ideal_nop = ideal_nop2_thumb; } else return -1; /* Convert to nop */ ulseek(fd_map, off, SEEK_SET); do { uwrite(fd_map, ideal_nop, nop_size); } while (--cnt > 0); return 0; } static unsigned char ideal_nop4_arm64[4] = {0x1f, 0x20, 0x03, 0xd5}; static int make_nop_arm64(void *map, size_t const offset) { uint32_t *ptr; ptr = map + offset; /* bl <_mcount> is 0x94000000 before relocation */ if (*ptr != 0x94000000) return -1; /* Convert to nop */ ulseek(fd_map, offset, SEEK_SET); uwrite(fd_map, ideal_nop, 4); return 0; } /* * Get the whole file as a programming convenience in order to avoid * malloc+lseek+read+free of many pieces. If successful, then mmap * avoids copying unused pieces; else just read the whole file. * Open for both read and write; new info will be appended to the file. * Use MAP_PRIVATE so that a few changes to the in-memory ElfXX_Ehdr * do not propagate to the file until an explicit overwrite at the last. * This preserves most aspects of consistency (all except .st_size) * for simultaneous readers of the file while we are appending to it. * However, multiple writers still are bad. We choose not to use * locking because it is expensive and the use case of kernel build * makes multiple writers unlikely. */ static void *mmap_file(char const *fname) { fd_map = open(fname, O_RDONLY); if (fd_map < 0 || fstat(fd_map, &sb) < 0) { perror(fname); fail_file(); } if (!S_ISREG(sb.st_mode)) { fprintf(stderr, "not a regular file: %s\n", fname); fail_file(); } file_map = mmap(0, sb.st_size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd_map, 0); mmap_failed = 0; if (file_map == MAP_FAILED) { mmap_failed = 1; file_map = umalloc(sb.st_size); uread(fd_map, file_map, sb.st_size); } close(fd_map); file_end = file_map + sb.st_size; return file_map; } static void write_file(const char *fname) { char tmp_file[strlen(fname) + 4]; size_t n; if (!file_updated) return;


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