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
33 * @section intro Introduction
34 * libpayload is a small BSD-licensed static library (a lightweight
35 * implementation of common and useful functions) intended to be used
36 * as a basis for coreboot payloads.
38 * @section example Example
39 * Here is an example of a very simple payload:
40 * @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
68 * Payload information parameters - these are used to pass information
69 * to the entity loading the payload.
70 * Usage: PAYLOAD_INFO(key, value)
71 * 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
93 /** Broken down time structure */
95 int tm_sec; /**< Number of seconds after the minute */
96 int tm_min; /**< Number of minutes after the hour */
97 int tm_hour; /**< Number of hours past midnight */
98 int tm_mday; /**< The day of the month */
99 int tm_mon; /**< The month of the year */
100 int tm_year; /**< The number of years since 1900 */
101 int tm_wday; /**< The day of the week */
102 int tm_yday; /**< The number of days since January 1 */
103 int tm_isdst; /**< A flag indicating daylight savings time */
106 u8 nvram_read(u8 addr);
107 void nvram_write(u8 val, u8 addr);
108 int nvram_updating(void);
109 void rtc_read_clock(struct tm *tm);
113 * @defgroup input Device functions
118 * @defgroup keyboard Keyboard functions
122 void keyboard_init(void);
123 int keyboard_havechar(void);
124 unsigned char keyboard_get_scancode(void);
125 int keyboard_getchar(void);
129 * @defgroup serial Serial functions
133 void serial_init(void);
134 void serial_putchar(unsigned char c);
135 int serial_havechar(void);
136 int serial_getchar(void);
137 void serial_clear(void);
138 void serial_start_bold(void);
139 void serial_end_bold(void);
140 void serial_start_altcharset(void);
141 void serial_end_altcharset(void);
142 void serial_set_cursor(int y, int x);
146 * @defgroup speaker Speaker functions
150 void speaker_enable(u16 freq);
151 void speaker_disable(void);
152 void speaker_tone(u16 freq, unsigned int duration);
156 * @defgroup video Video functions
160 int video_console_init(void);
161 void video_console_putchar(unsigned int ch);
162 void video_console_putc(u8 row, u8 col, unsigned int ch);
163 void video_console_clear(void);
164 void video_console_cursor_enable(int state);
165 void video_console_get_cursor(unsigned int *x, unsigned int *y, unsigned int *en);
166 void video_console_set_cursor(unsigned int cursorx, unsigned int cursory);
169 /* drivers/option.c */
170 int get_option(void *dest, char *name);
173 * @defgroup console Console functions
176 void console_init(void);
178 int puts(const char *s);
181 int getchar_timeout(int *ms);
183 extern int last_putchar;
185 #define havechar havekey
189 * @defgroup ctype Character type functions
210 * @defgroup ipchecksum IP checksum functions
213 unsigned short ipchksum(const void *ptr, unsigned long nbytes);
217 * @defgroup malloc Memory allocation functions
220 void free(void *ptr);
221 void *malloc(size_t size);
222 void *calloc(size_t nmemb, size_t size);
223 void *realloc(void *ptr, size_t size);
227 * @defgroup exec Execution functions
230 int exec(long addr, int argc, char **argv);
234 * @defgroup misc Misc functions
240 long int labs(long int j);
241 long long int llabs(long long int j);
244 void fatal(const char *msg) __attribute__ ((noreturn));
248 * @defgroup memory Memory manipulation functions
251 void *memset(void *s, int c, size_t n);
252 void *memcpy(void *dst, const void *src, size_t n);
253 void *memmove(void *dst, const void *src, size_t n);
254 int memcmp(const void *s1, const void *s2, size_t len);
258 * @defgroup printf Print functions
261 int snprintf(char *str, size_t size, const char *fmt, ...);
262 int sprintf(char *str, const char *fmt, ...);
263 int vsnprintf(char *str, size_t size, const char *fmt, va_list ap);
264 int vsprintf(char *str, const char *fmt, va_list ap);
265 int printf(const char *fmt, ...);
266 int vprintf(const char *fmt, va_list ap);
270 * @defgroup rand Random number generator functions
273 int rand_r(unsigned int *seed);
275 void srand(unsigned int seed);
279 * @defgroup hash Hashing functions
282 #define SHA1_BLOCK_LENGTH 64
283 #define SHA1_DIGEST_LENGTH 20
287 u8 buffer[SHA1_BLOCK_LENGTH];
289 void SHA1Init(SHA1_CTX *context);
290 void SHA1Transform(u32 state[5], const u8 buffer[SHA1_BLOCK_LENGTH]);
291 void SHA1Update(SHA1_CTX *context, const u8 *data, size_t len);
292 void SHA1Final(u8 digest[SHA1_DIGEST_LENGTH], SHA1_CTX *context);
293 u8 *sha1(const u8 *data, size_t len, u8 *buf);
297 * @defgroup string String functions
300 size_t strnlen(const char *str, size_t maxlen);
301 size_t strlen(const char *str);
302 int strcmp(const char *s1, const char *s2);
303 int strncmp(const char *s1, const char *s2, size_t maxlen);
304 char *strncpy(char *d, const char *s, size_t n);
305 char *strcpy(char *d, const char *s);
306 char *strncat(char *d, const char *s, size_t n);
307 char *strchr(const char *s, int c);
308 char *strdup(const char *s);
309 char *strstr(const char *h, const char *n);
313 * @defgroup time Time functions
317 /** System time structure */
319 time_t tv_sec; /**< Seconds */
320 suseconds_t tv_usec; /**< Microseconds */
323 int gettimeofday(struct timeval *tv, void *tz);
327 * @defgroup lar LAR functions
331 /** LAR file header */
333 void *start; /**< Location of the LAR in memory */
334 int cindex; /**< Next file to return in readlar() */
335 int count; /**< Number of entries in the header cache */
336 int alloc; /**< Number of slots in the header cache */
337 int eof; /**< Last entry in the header cache */
338 void **headers; /**< Pointer to the header cache */
341 /** A structure representing the next LAR entry */
343 u8 name[LAR_MAX_PATHLEN]; /**< The name of the next LAR entry */
346 /** A structure containing information about a LAR file */
348 u32 len; /**< Length of the file in the LAR */
349 u32 reallen; /**< Length of the uncompressed file */
350 u32 checksum; /**< Checksum of the uncompressed file */
351 u32 compchecksum; /**< Checksum of the compressed file in the LAR */
352 u32 offset; /**< Offset of the file in the LAR */
353 u32 compression; /**< Compression type of the file */
354 u64 entry; /**< Entry point of the file for executables */
355 u64 loadaddress; /**< Address in memory to put the uncompressed file */
358 /** A structure representing a LAR file */
360 struct LAR *lar; /**< Pointer to the LAR struct */
361 struct lar_header *header; /**< Pointer to the header struct */
362 u32 size; /**< Size of the file */
363 void *start; /**< Start of the file in memory */
364 u32 offset; /**< Offset of the file in the LAR */
367 struct LAR *openlar(void *addr);
368 int closelar(struct LAR *lar);
369 struct larent *readlar(struct LAR *lar);
370 void rewindlar(struct LAR *lar);
371 int larstat(struct LAR *lar, const char *path, struct larstat *buf);
372 void *larfptr(struct LAR *lar, const char *filename);
373 int lfverify(struct LAR *lar, const char *filename);
374 struct LFILE *lfopen(struct LAR *lar, const char *filename);
375 int lfread(void *ptr, size_t size, size_t nmemb, struct LFILE *stream);
377 #define SEEK_SET 0 /**< The seek offset is absolute. */
378 #define SEEK_CUR 1 /**< The seek offset is against the current position. */
379 #define SEEK_END 2 /**< The seek offset is against the end of the file. */
381 int lfseek(struct LFILE *stream, long offset, int whence);
382 int lfclose(struct LFILE *file);
386 * @defgroup arch Architecture specific functions
387 * This module contains global architecture specific functions.
388 * All architectures are expected to define these functions.
391 int get_coreboot_info(struct sysinfo_t *info);
393 void lib_get_sysinfo(void);
395 /* Timer functions - defined by each architecture. */
396 unsigned int get_cpu_speed(void);
397 void ndelay(unsigned int n);
398 void udelay(unsigned int n);
399 void mdelay(unsigned int n);
400 void delay(unsigned int n);
402 #define abort() halt() /**< Alias for the halt() function */
405 * Stop execution and halt the processor (this function does not return).
407 void halt(void) __attribute__ ((noreturn));
411 * @defgroup readline Readline functions
412 * This interface provides a simple implementation of the standard readline()
413 * and getline() functions. They read a line of input from the console.
416 char *readline(const char *prompt);
417 int getline(char *buffer, int len);