/* * 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 #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_LAR #include #endif #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 #define MAX_ARGC_COUNT 10 /* * 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 usb USB functions * @{ */ int usb_initialize(void); int usb_exit (void); int usbhid_havechar(void); int usbhid_getchar(void); /** @} */ /** * @defgroup input Device functions * @{ @} */ extern void (*reset_handler)(void); int add_reset_handler(void (*new_handler)(void)); /** * @defgroup keyboard Keyboard functions * @ingroup input * @{ */ void keyboard_init(void); int keyboard_havechar(void); unsigned char keyboard_get_scancode(void); int keyboard_getchar(void); int keyboard_set_layout(char *country); /** @} */ /** * @defgroup serial Serial functions * @ingroup input * @{ */ void serial_init(void); void serial_putchar(unsigned int 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_reverse(void); void serial_end_reverse(void); void serial_start_altcharset(void); void serial_end_altcharset(void); void serial_set_color(short fg, short bg); void serial_cursor_enable(int state); 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 */ struct nvram_accessor { u8 (*read)(u8 reg); void (*write)(u8 val, u8 reg); }; extern u8 *mem_accessor_base; extern struct nvram_accessor *use_nvram, *use_mem; struct cb_cmos_option_table *get_system_option_table(void); int options_checksum_valid(const struct nvram_accessor *nvram); void fix_options_checksum_with(const struct nvram_accessor *nvram); void fix_options_checksum(void); struct cb_cmos_entries *first_cmos_entry(struct cb_cmos_option_table *option_table); struct cb_cmos_entries *next_cmos_entry(struct cb_cmos_entries *cur); struct cb_cmos_enums *first_cmos_enum(struct cb_cmos_option_table *option_table); struct cb_cmos_enums *next_cmos_enum(struct cb_cmos_enums *cmos_enum); struct cb_cmos_enums *first_cmos_enum_of_id(struct cb_cmos_option_table *option_table, int id); struct cb_cmos_enums *next_cmos_enum_of_id(struct cb_cmos_enums *cmos_enum, int id); int get_option_with(const struct nvram_accessor *nvram, struct cb_cmos_option_table *option_table, void *dest, const char *name); int get_option_from(struct cb_cmos_option_table *option_table, void *dest, const char *name); int get_option(void *dest, const char *name); int set_option_with(const struct nvram_accessor *nvram, struct cb_cmos_option_table *option_table, const void *value, const char *name); int set_option(const void *value, const char *name); int get_option_as_string(const struct nvram_accessor *nvram, struct cb_cmos_option_table *option_table, char **dest, const char *name); int set_option_from_string(const struct nvram_accessor *nvram, struct cb_cmos_option_table *option_table, const char *value, const char *name); /** * @defgroup console Console functions * @{ */ void console_init(void); int putchar(unsigned int c); int puts(const char *s); int havekey(void); int getchar(void); int getchar_timeout(int *ms); extern int last_putchar; struct console_input_driver; struct console_input_driver { struct console_input_driver *next; int (*havekey) (void); int (*getchar) (void); }; struct console_output_driver; struct console_output_driver { struct console_output_driver *next; void (*putchar) (unsigned int); }; void console_add_output_driver(struct console_output_driver *out); void console_add_input_driver(struct console_input_driver *in); #define havechar havekey /** @} */ /** * @defgroup ipchecksum IP checksum functions * @{ */ unsigned short ipchksum(const void *ptr, unsigned long nbytes); /** @} */ /** * @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 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 SHA1Pad(SHA1_CTX *context); void SHA1Final(u8 digest[SHA1_DIGEST_LENGTH], SHA1_CTX *context); u8 *sha1(const u8 *data, size_t len, u8 *buf); /** @} */ /** * @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); /** @} */ #ifdef CONFIG_LAR /** * @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); int lfseek(struct LFILE *stream, long offset, int whence); int lfclose(struct LFILE *file); /** @} */ #endif /** * @defgroup info System information functions * This module contains functions that return information about the system * @{ */ int sysinfo_have_multiboot(unsigned long *addr); /** @} */ /** * @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); int get_multiboot_info(struct sysinfo_t *info); int 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); /** * @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