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
46 #include <libpayload-config.h>
53 #include <arch/types.h>
55 #include <arch/virtual.h>
62 #define MIN(a,b) ((a) < (b) ? (a) : (b))
63 #define MAX(a,b) ((a) > (b) ? (a) : (b))
64 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
66 #define LITTLE_ENDIAN 1234
67 #define BIG_ENDIAN 4321
69 #define EXIT_SUCCESS 0
70 #define EXIT_FAILURE 1
72 #define RAND_MAX 0x7fffffff
74 #define MAX_ARGC_COUNT 10
77 * Payload information parameters - these are used to pass information
78 * to the entity loading the payload.
79 * Usage: PAYLOAD_INFO(key, value)
80 * Example: PAYLOAD_INFO(name, "CoreInfo!")
82 #define _pstruct(key) __pinfo_ ##key
83 #define PAYLOAD_INFO(key, value) \
84 static const char _pstruct(key)[] \
85 __attribute__((__used__)) \
86 __attribute__((section(".note.pinfo"),unused)) = #key "=" value
89 * @defgroup nvram NVRAM and RTC functions
93 #define NVRAM_RTC_SECONDS 0 /**< RTC Seconds offset in CMOS */
94 #define NVRAM_RTC_MINUTES 2 /**< RTC Minutes offset in CMOS */
95 #define NVRAM_RTC_HOURS 4 /**< RTC Hours offset in CMOS */
96 #define NVRAM_RTC_DAY 7 /**< RTC Days offset in CMOS */
97 #define NVRAM_RTC_MONTH 8 /**< RTC Month offset in CMOS */
98 #define NVRAM_RTC_YEAR 9 /**< RTC Year offset in CMOS */
99 #define NVRAM_RTC_FREQ_SELECT 10 /**< RTC Update Status Register */
100 #define NVRAM_RTC_UIP 0x80
102 /** Broken down time structure */
104 int tm_sec; /**< Number of seconds after the minute */
105 int tm_min; /**< Number of minutes after the hour */
106 int tm_hour; /**< Number of hours past midnight */
107 int tm_mday; /**< The day of the month */
108 int tm_mon; /**< The month of the year */
109 int tm_year; /**< The number of years since 1900 */
110 int tm_wday; /**< The day of the week */
111 int tm_yday; /**< The number of days since January 1 */
112 int tm_isdst; /**< A flag indicating daylight savings time */
115 u8 nvram_read(u8 addr);
116 void nvram_write(u8 val, u8 addr);
117 int nvram_updating(void);
118 void rtc_read_clock(struct tm *tm);
122 * @defgroup usb USB functions
125 int usb_initialize(void);
127 int usbhid_havechar(void);
128 int usbhid_getchar(void);
132 * @defgroup input Device functions
136 extern void (*reset_handler)(void);
137 int add_reset_handler(void (*new_handler)(void));
140 * @defgroup keyboard Keyboard functions
144 void keyboard_init(void);
145 int keyboard_havechar(void);
146 unsigned char keyboard_get_scancode(void);
147 int keyboard_getchar(void);
148 int keyboard_set_layout(char *country);
152 * @defgroup serial Serial functions
156 void serial_init(void);
157 void serial_putchar(unsigned int c);
158 int serial_havechar(void);
159 int serial_getchar(void);
160 void serial_clear(void);
161 void serial_start_bold(void);
162 void serial_end_bold(void);
163 void serial_start_reverse(void);
164 void serial_end_reverse(void);
165 void serial_start_altcharset(void);
166 void serial_end_altcharset(void);
167 void serial_set_color(short fg, short bg);
168 void serial_cursor_enable(int state);
169 void serial_set_cursor(int y, int x);
173 * @defgroup speaker Speaker functions
177 void speaker_enable(u16 freq);
178 void speaker_disable(void);
179 void speaker_tone(u16 freq, unsigned int duration);
183 * @defgroup video Video functions
187 int video_console_init(void);
188 void video_console_putchar(unsigned int ch);
189 void video_console_putc(u8 row, u8 col, unsigned int ch);
190 void video_console_clear(void);
191 void video_console_cursor_enable(int state);
192 void video_console_get_cursor(unsigned int *x, unsigned int *y, unsigned int *en);
193 void video_console_set_cursor(unsigned int cursorx, unsigned int cursory);
196 /* drivers/option.c */
197 struct nvram_accessor {
199 void (*write)(u8 val, u8 reg);
202 extern u8 *mem_accessor_base;
203 extern struct nvram_accessor *use_nvram, *use_mem;
205 struct cb_cmos_option_table *get_system_option_table(void);
206 int options_checksum_valid(const struct nvram_accessor *nvram);
207 void fix_options_checksum_with(const struct nvram_accessor *nvram);
208 void fix_options_checksum(void);
209 struct cb_cmos_entries *first_cmos_entry(struct cb_cmos_option_table *option_table);
210 struct cb_cmos_entries *next_cmos_entry(struct cb_cmos_entries *cur);
211 int get_option_with(const struct nvram_accessor *nvram, struct cb_cmos_option_table *option_table, void *dest, const char *name);
212 int get_option_from(struct cb_cmos_option_table *option_table, void *dest, const char *name);
213 int get_option(void *dest, const char *name);
214 int set_option_with(const struct nvram_accessor *nvram, struct cb_cmos_option_table *option_table, const void *value, const char *name);
215 int set_option(const void *value, const char *name);
216 int get_option_as_string(const struct nvram_accessor *nvram, struct cb_cmos_option_table *option_table, char **dest, const char *name);
217 int set_option_from_string(const struct nvram_accessor *nvram, struct cb_cmos_option_table *option_table, const char *value, const char *name);
220 * @defgroup console Console functions
223 void console_init(void);
224 int putchar(unsigned int c);
225 int puts(const char *s);
228 int getchar_timeout(int *ms);
230 extern int last_putchar;
232 struct console_input_driver;
233 struct console_input_driver {
234 struct console_input_driver *next;
235 int (*havekey) (void);
236 int (*getchar) (void);
239 struct console_output_driver;
240 struct console_output_driver {
241 struct console_output_driver *next;
242 void (*putchar) (unsigned int);
245 void console_add_output_driver(struct console_output_driver *out);
246 void console_add_input_driver(struct console_input_driver *in);
248 #define havechar havekey
252 * @defgroup ipchecksum IP checksum functions
255 unsigned short ipchksum(const void *ptr, unsigned long nbytes);
260 * @defgroup exec Execution functions
263 int exec(long addr, int argc, char **argv);
267 * @defgroup misc Misc functions
273 long int labs(long int j);
274 long long int llabs(long long int j);
277 void fatal(const char *msg) __attribute__ ((noreturn));
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 SHA1Pad(SHA1_CTX *context);
296 void SHA1Final(u8 digest[SHA1_DIGEST_LENGTH], SHA1_CTX *context);
297 u8 *sha1(const u8 *data, size_t len, u8 *buf);
301 * @defgroup time Time functions
305 /** System time structure */
307 time_t tv_sec; /**< Seconds */
308 suseconds_t tv_usec; /**< Microseconds */
311 int gettimeofday(struct timeval *tv, void *tz);
316 * @defgroup lar LAR functions
320 /** LAR file header */
322 void *start; /**< Location of the LAR in memory */
323 int cindex; /**< Next file to return in readlar() */
324 int count; /**< Number of entries in the header cache */
325 int alloc; /**< Number of slots in the header cache */
326 int eof; /**< Last entry in the header cache */
327 void **headers; /**< Pointer to the header cache */
330 /** A structure representing the next LAR entry */
332 u8 name[LAR_MAX_PATHLEN]; /**< The name of the next LAR entry */
335 /** A structure containing information about a LAR file */
337 u32 len; /**< Length of the file in the LAR */
338 u32 reallen; /**< Length of the uncompressed file */
339 u32 checksum; /**< Checksum of the uncompressed file */
340 u32 compchecksum; /**< Checksum of the compressed file in the LAR */
341 u32 offset; /**< Offset of the file in the LAR */
342 u32 compression; /**< Compression type of the file */
343 u64 entry; /**< Entry point of the file for executables */
344 u64 loadaddress; /**< Address in memory to put the uncompressed file */
347 /** A structure representing a LAR file */
349 struct LAR *lar; /**< Pointer to the LAR struct */
350 struct lar_header *header; /**< Pointer to the header struct */
351 u32 size; /**< Size of the file */
352 void *start; /**< Start of the file in memory */
353 u32 offset; /**< Offset of the file in the LAR */
356 struct LAR *openlar(void *addr);
357 int closelar(struct LAR *lar);
358 struct larent *readlar(struct LAR *lar);
359 void rewindlar(struct LAR *lar);
360 int larstat(struct LAR *lar, const char *path, struct larstat *buf);
361 void *larfptr(struct LAR *lar, const char *filename);
362 int lfverify(struct LAR *lar, const char *filename);
363 struct LFILE *lfopen(struct LAR *lar, const char *filename);
364 int lfread(void *ptr, size_t size, size_t nmemb, struct LFILE *stream);
366 int lfseek(struct LFILE *stream, long offset, int whence);
367 int lfclose(struct LFILE *file);
372 * @defgroup info System information functions
373 * This module contains functions that return information about the system
377 int sysinfo_have_multiboot(unsigned long *addr);
381 * @defgroup arch Architecture specific functions
382 * This module contains global architecture specific functions.
383 * All architectures are expected to define these functions.
386 int get_coreboot_info(struct sysinfo_t *info);
387 int get_multiboot_info(struct sysinfo_t *info);
389 int lib_get_sysinfo(void);
391 /* Timer functions - defined by each architecture. */
392 unsigned int get_cpu_speed(void);
393 void ndelay(unsigned int n);
394 void udelay(unsigned int n);
395 void mdelay(unsigned int n);
396 void delay(unsigned int n);
399 * @defgroup readline Readline functions
400 * This interface provides a simple implementation of the standard readline()
401 * and getline() functions. They read a line of input from the console.
404 char *readline(const char *prompt);
405 int getline(char *buffer, int len);