2 * This file is part of the libpayload project.
4 * Copyright (C) 2008 Advanced Micro Devices, Inc.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * @section intro Introduction
32 * libpayload is a small BSD-licensed static library (a lightweight
33 * implementation of common and useful functions) intended to be used
34 * as a basis for coreboot payloads.
36 * @section example Example
37 * Here is an example of a very simple payload:
38 * @include sample/hello.c
47 #include <arch/types.h>
49 #include <arch/virtual.h>
55 #define MIN(a,b) ((a) < (b) ? (a) : (b))
56 #define MAX(a,b) ((a) > (b) ? (a) : (b))
57 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
59 #define LITTLE_ENDIAN 1234
60 #define BIG_ENDIAN 4321
62 #define EXIT_SUCCESS 0
63 #define EXIT_FAILURE 1
65 #define RAND_MAX 0x7fffffff
67 /* Payload information parameters - these are used to pass information
68 * to the entity loading the payload
69 * Usage: PAYLOAD_INFO(key, value)
70 * Example: PAYLOAD_INFO(name, "CoreInfo!")
73 #define _pstruct(key) __pinfo_ ##key
74 #define PAYLOAD_INFO(key, value) \
75 static const char _pstruct(key)[] \
76 __attribute__((__used__)) \
77 __attribute__((section(".note.pinfo"),unused)) = #key "=" value
80 * @defgroup nvram NVRAM and RTC functions
84 #define NVRAM_RTC_SECONDS 0 /**< RTC Seconds offset in CMOS */
85 #define NVRAM_RTC_MINUTES 2 /**< RTC Minutes offset in CMOS */
86 #define NVRAM_RTC_HOURS 4 /**< RTC Hours offset in CMOS */
87 #define NVRAM_RTC_DAY 7 /**< RTC Days offset in CMOS */
88 #define NVRAM_RTC_MONTH 8 /**< RTC Month offset in CMOS */
89 #define NVRAM_RTC_YEAR 9 /**< RTC Year offset in CMOS */
90 #define NVRAM_RTC_FREQ_SELECT 10 /**< RTC Update Status Register */
91 #define NVRAM_RTC_UIP 0x80
94 * \brief Broken down time structure
97 int tm_sec; /**< Number of seconds after the minute */
98 int tm_min; /**< Number of minutes after the hour */
99 int tm_hour; /**< Number of hours past midnight */
100 int tm_mday; /**< The day of the month */
101 int tm_mon; /**< The month of the year */
102 int tm_year; /**< The number of years since 1900 */
103 int tm_wday; /**< The day of the week */
104 int tm_yday; /**< The number of days since January 1 */
105 int tm_isdst; /**< A flag indicating daylight savings time */
108 u8 nvram_read(u8 addr);
109 void nvram_write(u8 val, u8 addr);
110 int nvram_updating(void);
111 void rtc_read_clock(struct tm *tm);
115 * @defgroup input Device functions
120 * @defgroup keyboard Keyboard functions
124 void keyboard_init(void);
125 int keyboard_havechar(void);
126 unsigned char keyboard_get_scancode(void);
127 int keyboard_getchar(void);
131 * @defgroup serial Serial functions
135 void serial_init(void);
136 void serial_putchar(unsigned char c);
137 int serial_havechar(void);
138 int serial_getchar(void);
140 void serial_clear(void);
141 void serial_start_bold(void);
142 void serial_end_bold(void);
143 void serial_start_altcharset(void);
144 void serial_end_altcharset(void);
145 void serial_set_cursor(int y, int x);
149 * @defgroup speaker Speaker functions
153 void speaker_enable(u16 freq);
154 void speaker_disable(void);
155 void speaker_tone(u16 freq, unsigned int duration);
159 * @defgroup video Video functions
163 int video_console_init(void);
164 void video_console_putchar(unsigned int ch);
165 void video_console_putc(u8 row, u8 col, unsigned int ch);
166 void video_console_clear(void);
167 void video_console_cursor_enable(int state);
168 void video_console_get_cursor(unsigned int *x, unsigned int *y, unsigned int *en);
169 void video_console_set_cursor(unsigned int cursorx, unsigned int cursory);
172 /* drivers/option.c */
173 int get_option(void *dest, char *name);
176 * @defgroup console Console functions
179 void console_init(void);
181 int puts(const char *s);
184 int getchar_timeout(int *ms);
186 extern int last_putchar;
188 #define havechar havekey
192 * @defgroup ctype Character Type Functions
213 * @defgroup ipchecksum IP Checksum Functions
216 unsigned short ipchksum(const void *ptr, unsigned long nbytes);
220 * @defgroup malloc Memory Allocation Functions
223 void free(void *ptr);
224 void *malloc(size_t size);
225 void *calloc(size_t nmemb, size_t size);
226 void *realloc(void *ptr, size_t size);
230 * @defgroup exec Execution Functions
233 int exec(long addr, int argc, char **argv);
237 * @defgroup misc Misc Functions
243 long int labs(long int j);
244 long long int llabs(long long int j);
247 void fatal(const char* msg) __attribute__ ((noreturn));
251 * @defgroup memory Memory Manipulation Functions
254 void *memset(void *s, int c, size_t n);
255 void *memcpy(void *dst, const void *src, size_t n);
256 void *memmove(void *dst, const void *src, size_t n);
257 int memcmp(const void *s1, const void *s2, size_t len);
261 * @defgroup printf Print Functions
264 int snprintf(char *str, size_t size, const char *fmt, ...);
265 int sprintf(char *str, const char *fmt, ...);
266 int vsnprintf(char *str, size_t size, const char *fmt, va_list ap);
267 int vsprintf(char *str, const char *fmt, va_list ap);
268 int printf(const char *fmt, ...);
269 int vprintf(const char *fmt, va_list ap);
273 * @defgroup rand Random Number Generator Functions
276 int rand_r(unsigned int *seed);
278 void srand(unsigned int seed);
282 * @defgroup hash Hashing Functions
285 #define SHA1_BLOCK_LENGTH 64
286 #define SHA1_DIGEST_LENGTH 20
290 u8 buffer[SHA1_BLOCK_LENGTH];
292 void SHA1Init(SHA1_CTX *context);
293 void SHA1Transform(u32 state[5], const u8 buffer[SHA1_BLOCK_LENGTH]);
294 void SHA1Update(SHA1_CTX *context, const u8 *data, size_t len);
295 void SHA1Final(u8 digest[SHA1_DIGEST_LENGTH], SHA1_CTX *context);
296 u8 *sha1(const u8 *data, size_t len, u8 *buf);
300 * @defgroup string String Functions
303 size_t strnlen(const char *str, size_t maxlen);
304 size_t strlen(const char *str);
305 int strcmp(const char *s1, const char *s2);
306 int strncmp(const char *s1, const char *s2, size_t maxlen);
307 char *strncpy(char *d, const char *s, size_t n);
308 char *strcpy(char *d, const char *s);
309 char *strncat(char *d, const char *s, size_t n);
310 char *strchr(const char *s, int c);
311 char *strdup(const char *s);
312 char *strstr(const char *h, const char *n);
316 * @defgroup time Time Functions
321 * @brief System time structure
325 time_t tv_sec; /**< Seconds */
326 suseconds_t tv_usec; /**< Microseconds */
329 int gettimeofday(struct timeval *tv, void *tz);
333 * @defgroup lar LAR Functions
338 * @brief LAR File Header
341 void * start; /**< Location of the LAR in memory */
342 int cindex; /**< Next file to return in readlar() */
343 int count; /**< Number of entries in the header cache */
344 int alloc; /**< Number of slots in the header cache */
345 int eof; /**< Last entry in the header cache */
346 void **headers; /**< Pointer to the header cache */
350 * @brief A structure representing the next LAR entry
353 u8 name[LAR_MAX_PATHLEN]; /**< The name of the next LAR entry */
357 * @brief A structure containing information about a LAR file
360 u32 len; /**< Length of the file in the LAR */
361 u32 reallen; /**< Length of the uncompressed file */
362 u32 checksum; /**< Checksum of the uncompressed file */
363 u32 compchecksum; /**< Checksum of the compressed file in the LAR */
364 u32 offset; /**< Offset of the file in the LAR */
365 u32 compression; /**< Compression type of the file */
366 u64 entry; /**< Entry point of the file for executables */
367 u64 loadaddress; /**< Address in memory to put the uncompressed file */
371 * @brief A structure representing a LAR file
375 struct LAR *lar; /**< Pointer to the LAR struct */
376 struct lar_header *header; /**< Pointer to the header struct */
377 u32 size; /**< Size of the file */
378 void *start; /**< Start of the file in memory */
379 u32 offset; /**< Offset of the file in the LAR */
382 struct LAR *openlar(void *addr);
383 int closelar(struct LAR *lar);
384 struct larent *readlar(struct LAR *lar);
385 void rewindlar(struct LAR *lar);
386 int larstat(struct LAR *lar, const char *path, struct larstat *buf);
387 void *larfptr(struct LAR *lar, const char *filename);
388 int lfverify(struct LAR *lar, const char *filename);
389 struct LFILE * lfopen(struct LAR *lar, const char *filename);
390 int lfread(void *ptr, size_t size, size_t nmemb, struct LFILE *stream);
392 #define SEEK_SET 0 /**@def The seek offset is absolute */
393 #define SEEK_CUR 1 /**@def The seek offset is against the current position */
394 #define SEEK_END 2 /**@def The see offset is against the end of the file */
396 int lfseek(struct LFILE *stream, long offset, int whence);
397 int lfclose(struct LFILE *file);
401 * @defgroup arch Architecture Specific Functions
402 * This modules contains global architecure specific functions.
403 * All architectures are expected to define these functions.
406 int get_coreboot_info(struct sysinfo_t *info);
408 void lib_get_sysinfo(void);
410 /* Timer functions - defined by each architecture. */
411 unsigned int get_cpu_speed(void);
412 void ndelay(unsigned int n);
413 void udelay(unsigned int n);
414 void mdelay(unsigned int n);
415 void delay(unsigned int n);
417 #define abort() halt() /**< Alias for the halt() function */
420 * Stops executions and halts the processor. This function does
423 void halt(void) __attribute__ ((noreturn));
427 * @defgroup readline Readline Functions
428 * This interface provides a simple implementation of the standard
429 * readline and getline functions. They are suitable for reading a
430 * line of input from the console.
433 char * readline(const char * prompt);
434 int getline(char *buffer, int len);