/* * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define BIT(x) (1ul << (x)) static inline u32 div_round_up(u32 n, u32 d) { return (n + d - 1) / d; } #define LITTLE_ENDIAN 1234 #define BIG_ENDIAN 4321 #define EXIT_SUCCESS 0 #define EXIT_FAILURE 1 #define RAND_MAX 0x7fffffff #define MAX_ARGC_COUNT 32 /** * @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 #define NVRAM_RTC_STATUSB 11 /**< RTC Status Register B */ #define NVRAM_RTC_FORMAT_24HOUR 0x02 #define NVRAM_RTC_FORMAT_BINARY 0x04 /** 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); void rtc_write_clock(const struct tm *tm); /** @} */ /** * @defgroup storage driver functions * @{ */ void storage_initialize(void); /** @} */ /** * @defgroup usb USB functions * @{ */ int usb_initialize(void); int usb_exit (void); int usbhid_havechar(void); int usbhid_getchar(void); int usbhid_getmodifiers(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); void keyboard_disconnect(void); bool keyboard_havechar(void); unsigned char keyboard_get_scancode(void); int keyboard_getchar(void); int keyboard_set_layout(char *country); int keyboard_getmodifier(void); void initialize_keyboard_media_key_mapping_callback(int (*media_key_mapper)(char)); enum KEYBOARD_MODIFIERS { KB_MOD_SHIFT = (1 << 0), KB_MOD_ALT = (1 << 1), KB_MOD_CTRL = (1 << 2), KB_MOD_CAPSLOCK = (1 << 3), }; /** @} */ /** * @defgroup mouse Mouse cursor functions * @ingroup input * @{ */ void mouse_cursor_poll(void); void mouse_cursor_get_rel(int *x, int *y, int *z); u32 mouse_cursor_get_buttons(void); void mouse_cursor_set_speed(u32 val); u32 mouse_cursor_get_speed(void); void mouse_cursor_set_acceleration(u8 val); u8 mouse_cursor_get_acceleration(void); /** @} */ /** * @defgroup i8042 controller functions * @ingroup input * @{ */ size_t i8042_has_ps2(void); size_t i8042_has_aux(void); u8 i8042_probe(void); void i8042_close(void); int i8042_cmd(u8 cmd); void i8042_write_data(u8 data); u8 i8042_data_ready_ps2(void); u8 i8042_data_ready_aux(void); u8 i8042_read_data_ps2(void); u8 i8042_peek_data_ps2(void); u8 i8042_read_data_aux(void); int i8042_wait_read_ps2(void); int i8042_wait_read_aux(void); int i8042_get_kbd_translation(void); int i8042_set_kbd_translation(bool xlate); /** @} */ /** * @defgroup i8042 PS2 Mouse functions * @ingroup input * @{ */ void i8042_mouse_init(void); void i8042_mouse_disconnect(void); /** @} */ /** * @defgroup serial Serial functions * @ingroup input * @{ */ void serial_init(void); void serial_console_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_init(void); int video_console_init(void); void video_get_rows_cols(unsigned int *rows, unsigned int *cols); 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); void video_console_move_cursor(int x, int y); /* * print characters on video console with colors. note that there is a size * restriction for the internal buffer. so, output string can be truncated. */ enum video_printf_align { VIDEO_PRINTF_ALIGN_KEEP = 0, VIDEO_PRINTF_ALIGN_LEFT, VIDEO_PRINTF_ALIGN_CENTER, VIDEO_PRINTF_ALIGN_RIGHT, }; void video_printf(int foreground, int background, enum video_printf_align align, const char *fmt, ...); /** @} */ /** * @defgroup cbmem_console CBMEM memory console. * @ingroup input * @{ */ void cbmem_console_init(void); void cbmem_console_write(const void *buffer, size_t count); /** * Take a snapshot of the CBMEM memory console. This function will allocate a * range of memory. Callers must free the returned buffer by themselves. * * @return The allocated buffer on success, NULL on failure. */ char *cbmem_console_snapshot(void); /** @} */ /* 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 * @{ */ typedef enum { CONSOLE_INPUT_TYPE_UNKNOWN = 0, CONSOLE_INPUT_TYPE_USB, CONSOLE_INPUT_TYPE_EC, CONSOLE_INPUT_TYPE_UART, CONSOLE_INPUT_TYPE_GPIO, } console_input_type; void console_init(void); void console_write(const void *buffer, size_t count); int putchar(unsigned int c); int puts(const char *s); int havekey(void); int getchar(void); int getchar_timeout(int *ms); console_input_type last_key_input_type(void); extern int last_putchar; struct console_input_driver; struct console_input_driver { struct console_input_driver *next; int (*havekey) (void); int (*getchar) (void); console_input_type input_type; }; struct console_output_driver; struct console_output_driver { struct console_output_driver *next; void (*putchar) (unsigned int); void (*write) (const void *, size_t); }; void console_add_output_driver(struct console_output_driver *out); void console_add_input_driver(struct console_input_driver *in); int console_remove_output_driver(void *function); #define havechar havekey /** @} */ /** * @defgroup mouse_cursor Mouse cursor functions * @{ */ typedef enum { CURSOR_INPUT_TYPE_UNKNOWN = 0, CURSOR_INPUT_TYPE_USB, CURSOR_INPUT_TYPE_PS2, } cursor_input_type; void mouse_cursor_init(void); struct mouse_cursor_input_driver; struct mouse_cursor_input_driver { struct mouse_cursor_input_driver *next; /* X,Y,Z axis and buttons */ void (*get_state)(int *, int *, int *, u32 *); cursor_input_type input_type; }; void mouse_cursor_add_input_driver(struct mouse_cursor_input_driver *in); /** @} */ /** * @defgroup exec Execution functions * @{ */ int exec(long addr, int argc, char **argv); /* * reboot() handles reboot requests made by libpayload. It has weak implementation * which should be overridden by payload. */ void __noreturn reboot(void); /** @} */ /** * @defgroup misc Misc functions * @{ */ int bcd2dec(int b); int dec2bcd(int d); u8 bin2hex(u8 b); u8 hex2bin(u8 h); void hexdump(const void *memory, size_t length); void fatal(const char *msg) __attribute__((noreturn)); /* Population Count: number of bits that are one */ static inline int popcnt(u32 x) { return __builtin_popcount(x); } /* Count Leading Zeroes: clz(0) == 32, clz(0xf) == 28, clz(1 << 31) == 0 */ static inline int clz(u32 x) { return x ? __builtin_clz(x) : (int)sizeof(x) * 8; } /* Integer binary logarithm (rounding down): log2(0) == -1, log2(5) == 2 */ static inline int log2(u32 x) { return (int)sizeof(x) * 8 - clz(x) - 1; } /* Find First Set: __ffs(0xf) == 0, __ffs(0) == -1, __ffs(1 << 31) == 31 */ static inline int __ffs(u32 x) { return log2(x & (u32)(-(s32)x)); } /* Find Last Set: __fls(1) == 0, __fls(5) == 2, __fls(1 << 31) == 31 */ static inline int __fls(u32 x) { return log2(x); } static inline int popcnt64(u64 x) { return __builtin_popcountll(x); } static inline int clz64(u64 x) { return x ? __builtin_clzll(x) : sizeof(x) * 8; } static inline int log2_64(u64 x) { return sizeof(x) * 8 - clz64(x) - 1; } static inline int __ffs64(u64 x) { return log2_64(x & (u64)(-(s64)x)); } static inline int __fls64(u64 x) { return log2_64(x); } /** @} */ /** * @defgroup mmio MMIO helper functions * @{ */ void buffer_from_fifo32(void *buffer, size_t size, void *fifo, int fifo_stride, int fifo_width); void buffer_to_fifo32_prefix(const void *buffer, u32 prefix, int prefsz, size_t size, void *fifo, int fifo_stride, int fifo_width); static inline void buffer_to_fifo32(const void *buffer, size_t size, void *fifo, int fifo_stride, int fifo_width) { buffer_to_fifo32_prefix(buffer, 0, 0, size, fifo, fifo_stride, fifo_width); } /** @} */ /** * @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 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); void *get_cb_header_ptr(void); int lib_get_sysinfo(void); void lib_sysinfo_get_memranges(struct memrange **ranges, uint64_t *nranges); /* Timer functions. */ /* Defined by each architecture. */ uint64_t timer_hz(void); uint64_t timer_raw_value(void); uint64_t timer_us(uint64_t base); /* Generic. */ /** * @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); /** @} */ /* Defined in arch/${ARCH}/selfboot.c */ void selfboot(void *entry); /* Enter remote GDB mode. Will initialize connection if not already up. */ void gdb_enter(void); /* Disconnect existing GDB connection if one exists. */ void gdb_exit(s8 exit_status); void __noreturn halt(void); #if CONFIG(LP_REMOTEGDB) /* Override abort()/halt() to trap into GDB if it is enabled. */ #define halt() do { gdb_enter(); halt(); } while (0) #endif #endif