2 * (C) GraÅžvydas "notaz" Ignotas, 2008-2012
4 * This work is licensed under the terms of any of these licenses
6 * - GNU GPL, version 2 or later.
7 * - GNU LGPL, version 2.1 or later.
9 * See the COPYING file in the top-level directory.
26 /* XXX: maybe unhardcode pagesize? */
27 #define HUGETLB_PAGESIZE (2 * 1024 * 1024)
28 #define HUGETLB_THRESHOLD (HUGETLB_PAGESIZE / 2)
30 #define MAP_HUGETLB 0x40000 /* arch specific */
34 int plat_is_dir(const char *path)
37 if ((dir = opendir(path))) {
44 int plat_get_data_dir(char *dst, int len)
52 static int plat_get_exe_dir(char *dst, int len)
55 memcpy(dst, PICO_DATA_DIR, sizeof PICO_DATA_DIR);
56 return sizeof(PICO_DATA_DIR) - 1;
58 int j, ret = readlink("/proc/self/exe", dst, len - 1);
65 for (j = ret - 1; j > 0; j--)
74 int plat_get_skin_dir(char *dst, int len)
76 int ret = plat_get_exe_dir(dst, len);
80 memcpy(dst + ret, "skin/", sizeof "skin/");
81 return ret + sizeof("skin/") - 1;
85 #define PICO_HOME_DIR "/.picodrive/"
87 int plat_get_root_dir(char *dst, int len)
89 #if !defined(NO_HOME_DIR) && !defined(__GP2X__) && !defined(PANDORA)
90 const char *home = getenv("HOME");
94 ret = snprintf(dst, len, "%s%s", home, PICO_HOME_DIR);
101 return plat_get_exe_dir(dst, len);
105 /* Wiz has a borked gettimeofday().. */
106 #define plat_get_ticks_ms plat_get_ticks_ms_good
107 #define plat_get_ticks_us plat_get_ticks_us_good
110 unsigned int plat_get_ticks_ms(void)
115 gettimeofday(&tv, NULL);
117 ret = (unsigned)tv.tv_sec * 1000;
118 /* approximate /= 1000 */
119 ret += ((unsigned)tv.tv_usec * 4195) >> 22;
124 unsigned int plat_get_ticks_us(void)
129 gettimeofday(&tv, NULL);
131 ret = (unsigned)tv.tv_sec * 1000000;
132 ret += (unsigned)tv.tv_usec;
137 void plat_sleep_ms(int ms)
142 int plat_wait_event(int *fds_hnds, int count, int timeout_ms)
144 struct timeval tv, *timeout = NULL;
145 int i, ret, fdmax = -1;
148 if (timeout_ms >= 0) {
149 tv.tv_sec = timeout_ms / 1000;
150 tv.tv_usec = (timeout_ms % 1000) * 1000;
155 for (i = 0; i < count; i++) {
156 if (fds_hnds[i] > fdmax) fdmax = fds_hnds[i];
157 FD_SET(fds_hnds[i], &fdset);
160 ret = select(fdmax + 1, &fdset, NULL, NULL, timeout);
163 perror("plat_wait_event: select failed");
169 return -1; /* timeout */
172 for (i = 0; i < count; i++)
173 if (FD_ISSET(fds_hnds[i], &fdset))
179 void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
181 static int hugetlb_warned;
182 int prot = PROT_READ | PROT_WRITE;
183 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
189 /* avoid MAP_FIXED, it overrides existing mappings..
193 if (size >= HUGETLB_THRESHOLD)
194 flags |= MAP_HUGETLB;
200 ret = mmap(req, size, prot, flags, -1, 0);
201 if (ret == MAP_FAILED && (flags & MAP_HUGETLB)) {
202 if (!hugetlb_warned) {
204 "warning: failed to do hugetlb mmap (%p, %zu): %d\n",
208 flags &= ~MAP_HUGETLB;
209 ret = mmap(req, size, prot, flags, -1, 0);
211 if (ret == MAP_FAILED)
214 if (req != NULL && ret != req) {
215 fprintf(stderr, "%s: mmaped to %p, requested %p\n",
216 is_fixed ? "error" : "warning", ret, req);
226 void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
230 #ifdef MREMAP_MAYMOVE
231 ret = mremap(ptr, oldsize, newsize, MREMAP_MAYMOVE);
232 if (ret == MAP_FAILED)
235 fprintf(stderr, "mremap %p %zd %zd: ",
236 ptr, oldsize, newsize);
238 // might be because huge pages can't be remapped,
239 // just make a new mapping
240 ret = plat_mmap(0, newsize, 0, 0);
241 if (ret == MAP_FAILED)
243 memcpy(ret, ptr, oldsize);
244 munmap(ptr, oldsize);
247 printf("warning: mremap moved: %p -> %p\n", ptr, ret);
252 void plat_munmap(void *ptr, size_t size)
256 ret = munmap(ptr, size);
257 if (ret != 0 && (size & (HUGETLB_PAGESIZE - 1))) {
258 // prehaps an autorounded hugetlb mapping?
259 size = (size + HUGETLB_PAGESIZE - 1) & ~(HUGETLB_PAGESIZE - 1);
260 ret = munmap(ptr, size);
264 "munmap(%p, %zu) failed: %d\n", ptr, size, errno);
268 int plat_mem_set_exec(void *ptr, size_t size)
270 int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
272 fprintf(stderr, "mprotect(%p, %zd) failed: %d\n",
279 void lprintf(const char *fmt, ...)