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coreboot/payloads/libpayload/include/libpayload.h

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/*
*
* 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 <libpayload-config.h>
#include <compiler.h>
#include <cbgfx.h>
#include <ctype.h>
#include <die.h>
#include <endian.h>
#include <fmap_serialized.h>
#include <ipchksum.h>
#include <kconfig.h>
#include <stddef.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <sys/types.h>
#include <arch/types.h>
#include <arch/io.h>
#include <arch/virtual.h>
#include <sysinfo.h>
#include <pci.h>
#include <archive.h>
/* Double-evaluation unsafe min/max, for bitfields and outside of functions */
#define __CMP_UNSAFE(a, b, op) ((a) op (b) ? (a) : (b))
#define MIN_UNSAFE(a, b) __CMP_UNSAFE(a, b, <)
#define MAX_UNSAFE(a, b) __CMP_UNSAFE(a, b, >)
#define __CMP_SAFE(a, b, op, var_a, var_b) ({ \
__TYPEOF_UNLESS_CONST(a, b) var_a = (a); \
__TYPEOF_UNLESS_CONST(b, a) var_b = (b); \
var_a op var_b ? var_a : var_b; \
})
#define __CMP(a, b, op) __builtin_choose_expr( \
__builtin_constant_p(a) && __builtin_constant_p(b), \
__CMP_UNSAFE(a, b, op), __CMP_SAFE(a, b, op, __TMPNAME, __TMPNAME))
#define MIN(a, b) __CMP(a, b, <)
#define MAX(a, b) __CMP(a, b, >)
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
#define BIT(x) (1ul << (x))
#define DIV_ROUND_UP(x, y) ({ \
typeof(x) _div_local_x = (x); \
typeof(y) _div_local_y = (y); \
(_div_local_x + _div_local_y - 1) / _div_local_y; \
})
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
/*
* 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
#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);
int 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_read_data_aux(void);
int i8042_wait_read_ps2(void);
int i8042_wait_read_aux(void);
/** @} */
/**
* @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);
/*
* 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);
/** @} */
/**
* @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 hexdump(const void *memory, size_t length);
void fatal(const char *msg) __attribute__((noreturn));
/* 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)); }
/** @} */
/**
* @defgroup mmio MMIO helper functions
* @{
*/
#if !CONFIG(LP_ARCH_MIPS)
void buffer_from_fifo32(void *buffer, size_t size, void *fifo,
int fifo_stride, int fifo_width);
void buffer_to_fifo32_prefix(void *buffer, u32 prefix, int prefsz, size_t size,
void *fifo, int fifo_stride, int fifo_width);
static inline void buffer_to_fifo32(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);
}
#endif
/** @} */
/**
* @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. */
unsigned int get_cpu_speed(void);
uint64_t timer_hz(void);
uint64_t timer_raw_value(void);
uint64_t timer_us(uint64_t base);
void arch_ndelay(uint64_t n);
/* Generic. */
/**
* Delay for a specified number of nanoseconds.
*
* @param ns Number of nanoseconds to delay for.
*/
static inline void ndelay(unsigned int ns)
{
arch_ndelay((uint64_t)ns);
}
/**
* Delay for a specified number of microseconds.
*
* @param us Number of microseconds to delay for.
*/
static inline void udelay(unsigned int us)
{
arch_ndelay((uint64_t)us * NSECS_PER_USEC);
}
/**
* Delay for a specified number of milliseconds.
*
* @param ms Number of milliseconds to delay for.
*/
static inline void mdelay(unsigned int ms)
{
arch_ndelay((uint64_t)ms * NSECS_PER_MSEC);
}
/**
* Delay for a specified number of seconds.
*
* @param s Number of seconds to delay for.
*/
static inline void delay(unsigned int s)
{
arch_ndelay((uint64_t)s * NSECS_PER_SEC);
}
/**
* @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);
/* look for area "name" in "fmap", setting offset and size to describe it.
Returns 0 on success, < 0 on error. */
int fmap_region_by_name(const uint32_t fmap_offset, const char * const name,
uint32_t * const offset, uint32_t * const size);
#endif
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