4 * SPDX-License-Identifier: GPL-2.0+
8 #include <linux/types.h>
9 #include <api_public.h>
13 static int valid_sig(struct api_signature *sig)
16 struct api_signature s;
21 * Clear the checksum field (in the local copy) so as to calculate the
22 * CRC with the same initial contents as at the time when the sig was
28 checksum = crc32(0, (unsigned char *)&s, sizeof(struct api_signature));
30 if (checksum != sig->checksum)
37 * Searches for the U-Boot API signature
39 * returns 1/0 depending on found/not found result
41 int api_search_sig(struct api_signature **sig)
44 uint32_t search_start = 0;
45 uint32_t search_end = 0;
51 search_hint = 255 * 1024 * 1024;
53 search_start = search_hint & ~0x000fffff;
54 search_end = search_start + API_SEARCH_LEN - API_SIG_MAGLEN;
56 sp = (unsigned char *)search_start;
57 while ((sp + API_SIG_MAGLEN) < (unsigned char *)search_end) {
58 if (!memcmp(sp, API_SIG_MAGIC, API_SIG_MAGLEN)) {
59 *sig = (struct api_signature *)sp;
70 /****************************************
74 ****************************************/
80 if (!syscall(API_GETC, NULL, &c))
90 if (!syscall(API_TSTC, NULL, &t))
98 syscall(API_PUTC, NULL, &c);
101 void ub_puts(const char *s)
103 syscall(API_PUTS, NULL, s);
106 /****************************************
110 ****************************************/
114 syscall(API_RESET, NULL);
117 static struct mem_region mr[UB_MAX_MR];
118 static struct sys_info si;
120 struct sys_info * ub_get_sys_info(void)
124 memset(&si, 0, sizeof(struct sys_info));
126 si.mr_no = UB_MAX_MR;
127 memset(&mr, 0, sizeof(mr));
129 if (!syscall(API_GET_SYS_INFO, &err, &si))
132 return ((err) ? NULL : &si);
135 /****************************************
139 ****************************************/
141 void ub_udelay(unsigned long usec)
143 syscall(API_UDELAY, NULL, &usec);
146 unsigned long ub_get_timer(unsigned long base)
150 if (!syscall(API_GET_TIMER, NULL, &cur, &base))
157 /****************************************************************************
161 * Devices are identified by handles: numbers 0, 1, 2, ..., UB_MAX_DEV-1
163 ***************************************************************************/
165 static struct device_info devices[UB_MAX_DEV];
167 struct device_info * ub_dev_get(int i)
169 return ((i < 0 || i >= UB_MAX_DEV) ? NULL : &devices[i]);
173 * Enumerates the devices: fills out device_info elements in the devices[]
176 * returns: number of devices found
178 int ub_dev_enum(void)
180 struct device_info *di;
183 memset(&devices, 0, sizeof(struct device_info) * UB_MAX_DEV);
186 if (!syscall(API_DEV_ENUM, NULL, di))
189 while (di->cookie != NULL) {
191 if (++n >= UB_MAX_DEV)
194 /* take another device_info */
197 /* pass on the previous cookie */
198 di->cookie = devices[n - 1].cookie;
200 if (!syscall(API_DEV_ENUM, NULL, di))
208 * handle: 0-based id of the device
210 * returns: 0 when OK, err otherwise
212 int ub_dev_open(int handle)
214 struct device_info *di;
217 if (handle < 0 || handle >= UB_MAX_DEV)
220 di = &devices[handle];
222 if (!syscall(API_DEV_OPEN, &err, di))
228 int ub_dev_close(int handle)
230 struct device_info *di;
232 if (handle < 0 || handle >= UB_MAX_DEV)
235 di = &devices[handle];
236 if (!syscall(API_DEV_CLOSE, NULL, di))
244 * Validates device for read/write, it has to:
249 * returns: 0/1 accordingly
251 static int dev_valid(int handle)
253 if (handle < 0 || handle >= UB_MAX_DEV)
256 if (devices[handle].state != DEV_STA_OPEN)
262 static int dev_stor_valid(int handle)
264 if (!dev_valid(handle))
267 if (!(devices[handle].type & DEV_TYP_STOR))
273 int ub_dev_read(int handle, void *buf, lbasize_t len, lbastart_t start,
276 struct device_info *di;
280 if (!dev_stor_valid(handle))
283 di = &devices[handle];
284 if (!syscall(API_DEV_READ, &err, di, buf, &len, &start, &act_len))
293 static int dev_net_valid(int handle)
295 if (!dev_valid(handle))
298 if (devices[handle].type != DEV_TYP_NET)
304 int ub_dev_recv(int handle, void *buf, int len, int *rlen)
306 struct device_info *di;
307 int err = 0, act_len;
309 if (!dev_net_valid(handle))
312 di = &devices[handle];
313 if (!syscall(API_DEV_READ, &err, di, buf, &len, &act_len))
322 int ub_dev_send(int handle, void *buf, int len)
324 struct device_info *di;
327 if (!dev_net_valid(handle))
330 di = &devices[handle];
331 if (!syscall(API_DEV_WRITE, &err, di, buf, &len))
337 /****************************************
341 ****************************************/
343 char * ub_env_get(const char *name)
347 if (!syscall(API_ENV_GET, NULL, name, &value))
353 void ub_env_set(const char *name, char *value)
355 syscall(API_ENV_SET, NULL, name, value);
358 static char env_name[256];
360 const char * ub_env_enum(const char *last)
362 const char *env, *str;
368 * It's OK to pass only the name piece as last (and not the whole
369 * 'name=val' string), since the API_ENUM_ENV call uses envmatch()
370 * internally, which handles such case
372 if (!syscall(API_ENV_ENUM, NULL, last, &env))
376 /* no more env. variables to enumerate */
379 /* next enumerated env var */
380 memset(env_name, 0, 256);
381 for (i = 0, str = env; *str != '=' && *str != '\0';)
382 env_name[i++] = *str++;
389 /****************************************
393 ****************************************/
395 int ub_display_get_info(int type, struct display_info *di)
399 if (!syscall(API_DISPLAY_GET_INFO, &err, type, di))
405 int ub_display_draw_bitmap(ulong bitmap, int x, int y)
409 if (!syscall(API_DISPLAY_DRAW_BITMAP, &err, bitmap, x, y))
415 void ub_display_clear(void)
417 syscall(API_DISPLAY_CLEAR, NULL);
420 __weak void *memcpy(void *dest, const void *src, size_t size)
422 unsigned char *dptr = dest;
423 const unsigned char *ptr = src;
424 const unsigned char *end = src + size;