bellard | ea88812 | 2004-02-16 22:12:40 +0000 | [diff] [blame] | 1 | /* |
| 2 | * QEMU low level functions |
| 3 | * |
| 4 | * Copyright (c) 2003 Fabrice Bellard |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to deal |
| 8 | * in the Software without restriction, including without limitation the rights |
| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 10 | * copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 22 | * THE SOFTWARE. |
| 23 | */ |
| 24 | #include <stdlib.h> |
| 25 | #include <stdio.h> |
| 26 | #include <stdarg.h> |
| 27 | #include <string.h> |
bellard | ea88812 | 2004-02-16 22:12:40 +0000 | [diff] [blame] | 28 | #include <errno.h> |
| 29 | #include <unistd.h> |
ths | 605686c | 2007-01-17 23:31:19 +0000 | [diff] [blame^] | 30 | #ifdef HOST_SOLARIS |
| 31 | #include <sys/types.h> |
| 32 | #include <sys/statvfs.h> |
| 33 | #endif |
bellard | ea88812 | 2004-02-16 22:12:40 +0000 | [diff] [blame] | 34 | |
| 35 | #include "cpu.h" |
pbrook | 6cb7ee8 | 2006-05-22 14:10:48 +0000 | [diff] [blame] | 36 | #if defined(USE_KQEMU) |
| 37 | #include "vl.h" |
| 38 | #endif |
bellard | ea88812 | 2004-02-16 22:12:40 +0000 | [diff] [blame] | 39 | |
bellard | 6e4255f | 2005-04-17 18:33:47 +0000 | [diff] [blame] | 40 | #ifdef _WIN32 |
| 41 | #include <windows.h> |
| 42 | #elif defined(_BSD) |
bellard | 194884d | 2005-02-21 20:10:36 +0000 | [diff] [blame] | 43 | #include <stdlib.h> |
| 44 | #else |
bellard | 49b470e | 2005-02-10 21:59:25 +0000 | [diff] [blame] | 45 | #include <malloc.h> |
bellard | 194884d | 2005-02-21 20:10:36 +0000 | [diff] [blame] | 46 | #endif |
bellard | 49b470e | 2005-02-10 21:59:25 +0000 | [diff] [blame] | 47 | |
bellard | ea88812 | 2004-02-16 22:12:40 +0000 | [diff] [blame] | 48 | void *get_mmap_addr(unsigned long size) |
| 49 | { |
| 50 | return NULL; |
| 51 | } |
| 52 | |
| 53 | void qemu_free(void *ptr) |
| 54 | { |
| 55 | free(ptr); |
| 56 | } |
| 57 | |
| 58 | void *qemu_malloc(size_t size) |
| 59 | { |
| 60 | return malloc(size); |
| 61 | } |
| 62 | |
bellard | 6e4255f | 2005-04-17 18:33:47 +0000 | [diff] [blame] | 63 | #if defined(_WIN32) |
| 64 | |
| 65 | void *qemu_vmalloc(size_t size) |
| 66 | { |
| 67 | /* FIXME: this is not exactly optimal solution since VirtualAlloc |
| 68 | has 64Kb granularity, but at least it guarantees us that the |
| 69 | memory is page aligned. */ |
| 70 | return VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE); |
| 71 | } |
| 72 | |
| 73 | void qemu_vfree(void *ptr) |
| 74 | { |
| 75 | VirtualFree(ptr, 0, MEM_RELEASE); |
| 76 | } |
| 77 | |
pbrook | 6cb7ee8 | 2006-05-22 14:10:48 +0000 | [diff] [blame] | 78 | #else |
| 79 | |
| 80 | #if defined(USE_KQEMU) |
bellard | 49b470e | 2005-02-10 21:59:25 +0000 | [diff] [blame] | 81 | |
bellard | 6bae7ed | 2005-04-23 20:44:25 +0000 | [diff] [blame] | 82 | #include <sys/vfs.h> |
bellard | 49b470e | 2005-02-10 21:59:25 +0000 | [diff] [blame] | 83 | #include <sys/mman.h> |
| 84 | #include <fcntl.h> |
| 85 | |
pbrook | 6cb7ee8 | 2006-05-22 14:10:48 +0000 | [diff] [blame] | 86 | void *kqemu_vmalloc(size_t size) |
bellard | 49b470e | 2005-02-10 21:59:25 +0000 | [diff] [blame] | 87 | { |
| 88 | static int phys_ram_fd = -1; |
| 89 | static int phys_ram_size = 0; |
| 90 | const char *tmpdir; |
| 91 | char phys_ram_file[1024]; |
| 92 | void *ptr; |
ths | 605686c | 2007-01-17 23:31:19 +0000 | [diff] [blame^] | 93 | #ifdef HOST_SOLARIS |
| 94 | struct statvfs stfs; |
| 95 | #else |
bellard | 6bae7ed | 2005-04-23 20:44:25 +0000 | [diff] [blame] | 96 | struct statfs stfs; |
ths | 605686c | 2007-01-17 23:31:19 +0000 | [diff] [blame^] | 97 | #endif |
bellard | 49b470e | 2005-02-10 21:59:25 +0000 | [diff] [blame] | 98 | |
| 99 | if (phys_ram_fd < 0) { |
| 100 | tmpdir = getenv("QEMU_TMPDIR"); |
| 101 | if (!tmpdir) |
ths | 605686c | 2007-01-17 23:31:19 +0000 | [diff] [blame^] | 102 | #ifdef HOST_SOLARIS |
| 103 | tmpdir = "/tmp"; |
| 104 | if (statvfs(tmpdir, &stfs) == 0) { |
| 105 | #else |
bellard | 49b470e | 2005-02-10 21:59:25 +0000 | [diff] [blame] | 106 | tmpdir = "/dev/shm"; |
bellard | 6bae7ed | 2005-04-23 20:44:25 +0000 | [diff] [blame] | 107 | if (statfs(tmpdir, &stfs) == 0) { |
ths | 605686c | 2007-01-17 23:31:19 +0000 | [diff] [blame^] | 108 | #endif |
bellard | 6bae7ed | 2005-04-23 20:44:25 +0000 | [diff] [blame] | 109 | int64_t free_space; |
| 110 | int ram_mb; |
| 111 | |
| 112 | extern int ram_size; |
| 113 | free_space = (int64_t)stfs.f_bavail * stfs.f_bsize; |
| 114 | if ((ram_size + 8192 * 1024) >= free_space) { |
| 115 | ram_mb = (ram_size / (1024 * 1024)); |
| 116 | fprintf(stderr, |
| 117 | "You do not have enough space in '%s' for the %d MB of QEMU virtual RAM.\n", |
| 118 | tmpdir, ram_mb); |
| 119 | if (strcmp(tmpdir, "/dev/shm") == 0) { |
| 120 | fprintf(stderr, "To have more space available provided you have enough RAM and swap, do as root:\n" |
| 121 | "umount /dev/shm\n" |
| 122 | "mount -t tmpfs -o size=%dm none /dev/shm\n", |
| 123 | ram_mb + 16); |
| 124 | } else { |
| 125 | fprintf(stderr, |
| 126 | "Use the '-m' option of QEMU to diminish the amount of virtual RAM or use the\n" |
| 127 | "QEMU_TMPDIR environment variable to set another directory where the QEMU\n" |
| 128 | "temporary RAM file will be opened.\n"); |
| 129 | } |
pbrook | 6cb7ee8 | 2006-05-22 14:10:48 +0000 | [diff] [blame] | 130 | fprintf(stderr, "Or disable the accelerator module with -no-kqemu\n"); |
bellard | 6bae7ed | 2005-04-23 20:44:25 +0000 | [diff] [blame] | 131 | exit(1); |
| 132 | } |
| 133 | } |
bellard | 49b470e | 2005-02-10 21:59:25 +0000 | [diff] [blame] | 134 | snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/qemuXXXXXX", |
| 135 | tmpdir); |
bellard | 243a273 | 2006-08-17 16:19:07 +0000 | [diff] [blame] | 136 | phys_ram_fd = mkstemp(phys_ram_file); |
| 137 | if (phys_ram_fd < 0) { |
bellard | 49b470e | 2005-02-10 21:59:25 +0000 | [diff] [blame] | 138 | fprintf(stderr, |
| 139 | "warning: could not create temporary file in '%s'.\n" |
| 140 | "Use QEMU_TMPDIR to select a directory in a tmpfs filesystem.\n" |
| 141 | "Using '/tmp' as fallback.\n", |
| 142 | tmpdir); |
| 143 | snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/qemuXXXXXX", |
| 144 | "/tmp"); |
bellard | 243a273 | 2006-08-17 16:19:07 +0000 | [diff] [blame] | 145 | phys_ram_fd = mkstemp(phys_ram_file); |
| 146 | if (phys_ram_fd < 0) { |
bellard | 49b470e | 2005-02-10 21:59:25 +0000 | [diff] [blame] | 147 | fprintf(stderr, "Could not create temporary memory file '%s'\n", |
| 148 | phys_ram_file); |
| 149 | exit(1); |
| 150 | } |
| 151 | } |
bellard | 49b470e | 2005-02-10 21:59:25 +0000 | [diff] [blame] | 152 | unlink(phys_ram_file); |
| 153 | } |
| 154 | size = (size + 4095) & ~4095; |
| 155 | ftruncate(phys_ram_fd, phys_ram_size + size); |
| 156 | ptr = mmap(NULL, |
| 157 | size, |
| 158 | PROT_WRITE | PROT_READ, MAP_SHARED, |
| 159 | phys_ram_fd, phys_ram_size); |
| 160 | if (ptr == MAP_FAILED) { |
| 161 | fprintf(stderr, "Could not map physical memory\n"); |
| 162 | exit(1); |
| 163 | } |
| 164 | phys_ram_size += size; |
| 165 | return ptr; |
| 166 | } |
| 167 | |
pbrook | 6cb7ee8 | 2006-05-22 14:10:48 +0000 | [diff] [blame] | 168 | void kqemu_vfree(void *ptr) |
bellard | 49b470e | 2005-02-10 21:59:25 +0000 | [diff] [blame] | 169 | { |
| 170 | /* may be useful some day, but currently we do not need to free */ |
| 171 | } |
| 172 | |
pbrook | 6cb7ee8 | 2006-05-22 14:10:48 +0000 | [diff] [blame] | 173 | #endif |
bellard | 49b470e | 2005-02-10 21:59:25 +0000 | [diff] [blame] | 174 | |
| 175 | /* alloc shared memory pages */ |
| 176 | void *qemu_vmalloc(size_t size) |
| 177 | { |
pbrook | 6cb7ee8 | 2006-05-22 14:10:48 +0000 | [diff] [blame] | 178 | #if defined(USE_KQEMU) |
| 179 | if (kqemu_allowed) |
| 180 | return kqemu_vmalloc(size); |
| 181 | #endif |
bellard | 49b470e | 2005-02-10 21:59:25 +0000 | [diff] [blame] | 182 | #ifdef _BSD |
| 183 | return valloc(size); |
| 184 | #else |
| 185 | return memalign(4096, size); |
| 186 | #endif |
| 187 | } |
| 188 | |
| 189 | void qemu_vfree(void *ptr) |
| 190 | { |
pbrook | 6cb7ee8 | 2006-05-22 14:10:48 +0000 | [diff] [blame] | 191 | #if defined(USE_KQEMU) |
| 192 | if (kqemu_allowed) |
| 193 | kqemu_vfree(ptr); |
| 194 | #endif |
bellard | 49b470e | 2005-02-10 21:59:25 +0000 | [diff] [blame] | 195 | free(ptr); |
| 196 | } |
| 197 | |
| 198 | #endif |
| 199 | |
bellard | 07d8986 | 2004-03-14 21:41:12 +0000 | [diff] [blame] | 200 | void *qemu_mallocz(size_t size) |
| 201 | { |
| 202 | void *ptr; |
| 203 | ptr = qemu_malloc(size); |
| 204 | if (!ptr) |
| 205 | return NULL; |
| 206 | memset(ptr, 0, size); |
| 207 | return ptr; |
| 208 | } |
| 209 | |
bellard | 2571929 | 2004-07-14 17:21:57 +0000 | [diff] [blame] | 210 | char *qemu_strdup(const char *str) |
| 211 | { |
| 212 | char *ptr; |
| 213 | ptr = qemu_malloc(strlen(str) + 1); |
| 214 | if (!ptr) |
| 215 | return NULL; |
| 216 | strcpy(ptr, str); |
| 217 | return ptr; |
| 218 | } |