coreboot-kgpe-d16/payloads/libpayload/include/libpayload.h

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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2008 Advanced Micro Devices, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/**
* @mainpage
*
* @section intro Introduction
* libpayload is a small BSD-licensed static library (a lightweight
* implementation of common and useful functions) intended to be used
* as a basis for coreboot payloads.
*
* @section example Example
* Here is an example of a very simple payload:
* @include sample/hello.c
*/
#ifndef _LIBPAYLOAD_H
#define _LIBPAYLOAD_H
#include <stddef.h>
#include <arch/types.h>
#include <arch/io.h>
#include <arch/virtual.h>
#include <sysinfo.h>
#include <stdarg.h>
#include <lar.h>
#include <pci.h>
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#define MAX(a,b) ((a) > (b) ? (a) : (b))
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
#define LITTLE_ENDIAN 1234
#define BIG_ENDIAN 4321
#define EXIT_SUCCESS 0
#define EXIT_FAILURE 1
#define RAND_MAX 0x7fffffff
/*
* Payload information parameters - these are used to pass information
* to the entity loading the payload.
* Usage: PAYLOAD_INFO(key, value)
* Example: PAYLOAD_INFO(name, "CoreInfo!")
*/
#define _pstruct(key) __pinfo_ ##key
#define PAYLOAD_INFO(key, value) \
static const char _pstruct(key)[] \
__attribute__((__used__)) \
__attribute__((section(".note.pinfo"),unused)) = #key "=" value
/**
* @defgroup nvram NVRAM and RTC functions
* @{
*/
#define NVRAM_RTC_SECONDS 0 /**< RTC Seconds offset in CMOS */
#define NVRAM_RTC_MINUTES 2 /**< RTC Minutes offset in CMOS */
#define NVRAM_RTC_HOURS 4 /**< RTC Hours offset in CMOS */
#define NVRAM_RTC_DAY 7 /**< RTC Days offset in CMOS */
#define NVRAM_RTC_MONTH 8 /**< RTC Month offset in CMOS */
#define NVRAM_RTC_YEAR 9 /**< RTC Year offset in CMOS */
#define NVRAM_RTC_FREQ_SELECT 10 /**< RTC Update Status Register */
#define NVRAM_RTC_UIP 0x80
/** Broken down time structure */
struct tm {
int tm_sec; /**< Number of seconds after the minute */
int tm_min; /**< Number of minutes after the hour */
int tm_hour; /**< Number of hours past midnight */
int tm_mday; /**< The day of the month */
int tm_mon; /**< The month of the year */
int tm_year; /**< The number of years since 1900 */
int tm_wday; /**< The day of the week */
int tm_yday; /**< The number of days since January 1 */
int tm_isdst; /**< A flag indicating daylight savings time */
};
u8 nvram_read(u8 addr);
void nvram_write(u8 val, u8 addr);
int nvram_updating(void);
void rtc_read_clock(struct tm *tm);
/** @} */
/**
* @defgroup input Device functions
* @{ @}
*/
/**
* @defgroup keyboard Keyboard functions
* @ingroup input
* @{
*/
void keyboard_init(void);
int keyboard_havechar(void);
unsigned char keyboard_get_scancode(void);
int keyboard_getchar(void);
/** @} */
/**
* @defgroup serial Serial functions
* @ingroup input
* @{
*/
void serial_init(void);
void serial_putchar(unsigned char c);
int serial_havechar(void);
int serial_getchar(void);
void serial_clear(void);
void serial_start_bold(void);
void serial_end_bold(void);
void serial_start_altcharset(void);
void serial_end_altcharset(void);
void serial_set_color(short fg, short bg);
void serial_set_cursor(int y, int x);
/** @} */
/**
* @defgroup speaker Speaker functions
* @ingroup input
* @{
*/
void speaker_enable(u16 freq);
void speaker_disable(void);
void speaker_tone(u16 freq, unsigned int duration);
/** @} */
/**
* @defgroup video Video functions
* @ingroup input
* @{
*/
int video_console_init(void);
void video_console_putchar(unsigned int ch);
void video_console_putc(u8 row, u8 col, unsigned int ch);
void video_console_clear(void);
void video_console_cursor_enable(int state);
void video_console_get_cursor(unsigned int *x, unsigned int *y, unsigned int *en);
void video_console_set_cursor(unsigned int cursorx, unsigned int cursory);
/** @} */
/* drivers/option.c */
int get_option(void *dest, char *name);
/**
* @defgroup console Console functions
* @{
*/
void console_init(void);
int putchar(int c);
int puts(const char *s);
int havekey(void);
int getchar(void);
int getchar_timeout(int *ms);
extern int last_putchar;
#define havechar havekey
/** @} */
/**
* @defgroup ctype Character type functions
* @{
*/
int isalnum(int c);
int isalpha(int c);
int isascii(int c);
int isblank(int c);
int iscntrl(int c);
int isdigit(int c);
int isgraph(int c);
int islower(int c);
int isprint(int c);
int ispunct(int c);
int isspace(int c);
int isupper(int c);
int isxdigit(int c);
int tolower(int c);
int toupper(int c);
/** @} */
/**
* @defgroup ipchecksum IP checksum functions
* @{
*/
unsigned short ipchksum(const void *ptr, unsigned long nbytes);
/** @} */
/**
* @defgroup malloc Memory allocation functions
* @{
*/
void free(void *ptr);
void *malloc(size_t size);
void *calloc(size_t nmemb, size_t size);
void *realloc(void *ptr, size_t size);
void *memalign(size_t align, size_t size);
/** @} */
/**
* @defgroup exec Execution functions
* @{
*/
int exec(long addr, int argc, char **argv);
/** @} */
/**
* @defgroup misc Misc functions
* @{
*/
int bcd2dec(int b);
int dec2bcd(int d);
int abs(int j);
long int labs(long int j);
long long int llabs(long long int j);
u8 bin2hex(u8 b);
u8 hex2bin(u8 h);
void fatal(const char *msg) __attribute__ ((noreturn));
/** @} */
/**
* @defgroup memory Memory manipulation functions
* @{
*/
void *memset(void *s, int c, size_t n);
void *memcpy(void *dst, const void *src, size_t n);
void *memmove(void *dst, const void *src, size_t n);
int memcmp(const void *s1, const void *s2, size_t len);
/** @} */
/**
* @defgroup printf Print functions
* @{
*/
int snprintf(char *str, size_t size, const char *fmt, ...);
int sprintf(char *str, const char *fmt, ...);
int vsnprintf(char *str, size_t size, const char *fmt, va_list ap);
int vsprintf(char *str, const char *fmt, va_list ap);
int printf(const char *fmt, ...);
int vprintf(const char *fmt, va_list ap);
/** @} */
/**
* @defgroup rand Random number generator functions
* @{
*/
int rand_r(unsigned int *seed);
int rand(void);
void srand(unsigned int seed);
/** @} */
/**
* @defgroup hash Hashing functions
* @{
*/
#define SHA1_BLOCK_LENGTH 64
#define SHA1_DIGEST_LENGTH 20
typedef struct {
u32 state[5];
u64 count;
u8 buffer[SHA1_BLOCK_LENGTH];
} SHA1_CTX;
void SHA1Init(SHA1_CTX *context);
void SHA1Transform(u32 state[5], const u8 buffer[SHA1_BLOCK_LENGTH]);
void SHA1Update(SHA1_CTX *context, const u8 *data, size_t len);
void SHA1Final(u8 digest[SHA1_DIGEST_LENGTH], SHA1_CTX *context);
u8 *sha1(const u8 *data, size_t len, u8 *buf);
/** @} */
/**
* @defgroup string String functions
* @{
*/
size_t strnlen(const char *str, size_t maxlen);
size_t strlen(const char *str);
int strcmp(const char *s1, const char *s2);
int strncmp(const char *s1, const char *s2, size_t maxlen);
char *strncpy(char *d, const char *s, size_t n);
char *strcpy(char *d, const char *s);
char *strncat(char *d, const char *s, size_t n);
char *strchr(const char *s, int c);
char *strdup(const char *s);
char *strstr(const char *h, const char *n);
/** @} */
/**
* @defgroup time Time functions
* @{
*/
/** System time structure */
struct timeval {
time_t tv_sec; /**< Seconds */
suseconds_t tv_usec; /**< Microseconds */
};
int gettimeofday(struct timeval *tv, void *tz);
/** @} */
/**
* @defgroup lar LAR functions
* @{
*/
/** LAR file header */
struct LAR {
void *start; /**< Location of the LAR in memory */
int cindex; /**< Next file to return in readlar() */
int count; /**< Number of entries in the header cache */
int alloc; /**< Number of slots in the header cache */
int eof; /**< Last entry in the header cache */
void **headers; /**< Pointer to the header cache */
};
/** A structure representing the next LAR entry */
struct larent {
u8 name[LAR_MAX_PATHLEN]; /**< The name of the next LAR entry */
};
/** A structure containing information about a LAR file */
struct larstat {
u32 len; /**< Length of the file in the LAR */
u32 reallen; /**< Length of the uncompressed file */
u32 checksum; /**< Checksum of the uncompressed file */
u32 compchecksum; /**< Checksum of the compressed file in the LAR */
u32 offset; /**< Offset of the file in the LAR */
u32 compression; /**< Compression type of the file */
u64 entry; /**< Entry point of the file for executables */
u64 loadaddress; /**< Address in memory to put the uncompressed file */
};
/** A structure representing a LAR file */
struct LFILE {
struct LAR *lar; /**< Pointer to the LAR struct */
struct lar_header *header; /**< Pointer to the header struct */
u32 size; /**< Size of the file */
void *start; /**< Start of the file in memory */
u32 offset; /**< Offset of the file in the LAR */
};
struct LAR *openlar(void *addr);
int closelar(struct LAR *lar);
struct larent *readlar(struct LAR *lar);
void rewindlar(struct LAR *lar);
int larstat(struct LAR *lar, const char *path, struct larstat *buf);
void *larfptr(struct LAR *lar, const char *filename);
int lfverify(struct LAR *lar, const char *filename);
struct LFILE *lfopen(struct LAR *lar, const char *filename);
int lfread(void *ptr, size_t size, size_t nmemb, struct LFILE *stream);
#define SEEK_SET 0 /**< The seek offset is absolute. */
#define SEEK_CUR 1 /**< The seek offset is against the current position. */
#define SEEK_END 2 /**< The seek offset is against the end of the file. */
int lfseek(struct LFILE *stream, long offset, int whence);
int lfclose(struct LFILE *file);
/** @} */
/**
* @defgroup arch Architecture specific functions
* This module contains global architecture specific functions.
* All architectures are expected to define these functions.
* @{
*/
int get_coreboot_info(struct sysinfo_t *info);
void lib_get_sysinfo(void);
/* Timer functions - defined by each architecture. */
unsigned int get_cpu_speed(void);
void ndelay(unsigned int n);
void udelay(unsigned int n);
void mdelay(unsigned int n);
void delay(unsigned int n);
#define abort() halt() /**< Alias for the halt() function */
/**
* Stop execution and halt the processor (this function does not return).
*/
void halt(void) __attribute__ ((noreturn));
/** @} */
/**
* @defgroup readline Readline functions
* This interface provides a simple implementation of the standard readline()
* and getline() functions. They read a line of input from the console.
* @{
*/
char *readline(const char *prompt);
int getline(char *buffer, int len);
/** @} */
#endif