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efi: Add start-up library code

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When running as an EFI application, U-Boot must request memory from EFI,
and provide access to the boot services U-Boot needs.

Add library code to perform these tasks. This includes efi_main() which is
the entry point from EFI. U-Boot is built as a shared library.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
master
Simon Glass 9 years ago
parent 8f3b9694b2
commit 867a6ac86d
10 changed files with 887 additions and 64 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 59
      arch/x86/include/asm/fsp/fsp_hob.h
  2. 356
      include/efi.h
  3. 244
      include/efi_api.h
  4. 9
      include/part_efi.h
  5. 2
      lib/Kconfig
  6. 1
      lib/Makefile
  7. 33
      lib/efi/Kconfig
  8. 7
      lib/efi/Makefile
  9. 101
      lib/efi/efi.c
  10. 139
      lib/efi/efi_app.c

59
arch/x86/include/asm/fsp/fsp_hob.h
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@ -8,6 +8,8 @@
#ifndef __FSP_HOB_H__
#define __FSP_HOB_H__
#include <efi.h>
/* Type of HOB Header */
#define HOB_TYPE_MEM_ALLOC 0x0002
#define HOB_TYPE_RES_DESC 0x0003
@ -25,63 +27,6 @@ struct hob_header {
u32 reserved; /* always zero */
};
/* Enumeration of memory types introduced in UEFI */
enum efi_mem_type {
EFI_RESERVED_MEMORY_TYPE,
/*
* The code portions of a loaded application.
* (Note that UEFI OS loaders are UEFI applications.)
*/
EFI_LOADER_CODE,
/*
* The data portions of a loaded application and
* the default data allocation type used by an application
* to allocate pool memory.
*/
EFI_LOADER_DATA,
/* The code portions of a loaded Boot Services Driver */
EFI_BOOT_SERVICES_CODE,
/*
* The data portions of a loaded Boot Serves Driver and
* the default data allocation type used by a Boot Services
* Driver to allocate pool memory.
*/
EFI_BOOT_SERVICES_DATA,
/* The code portions of a loaded Runtime Services Driver */
EFI_RUNTIME_SERVICES_CODE,
/*
* The data portions of a loaded Runtime Services Driver and
* the default data allocation type used by a Runtime Services
* Driver to allocate pool memory.
*/
EFI_RUNTIME_SERVICES_DATA,
/* Free (unallocated) memory */
EFI_CONVENTIONAL_MEMORY,
/* Memory in which errors have been detected */
EFI_UNUSABLE_MEMORY,
/* Memory that holds the ACPI tables */
EFI_ACPI_RECLAIM_MEMORY,
/* Address space reserved for use by the firmware */
EFI_ACPI_MEMORY_NVS,
/*
* Used by system firmware to request that a memory-mapped IO region
* be mapped by the OS to a virtual address so it can be accessed by
* EFI runtime services.
*/
EFI_MMAP_IO,
/*
* System memory-mapped IO region that is used to translate
* memory cycles to IO cycles by the processor.
*/
EFI_MMAP_IO_PORT,
/*
* Address space reserved by the firmware for code that is
* part of the processor.
*/
EFI_PAL_CODE,
EFI_MAX_MEMORY_TYPE
};
/*
* Describes all memory ranges used during the HOB producer phase that
* exist outside the HOB list. This HOB type describes how memory is used,

356
include/efi.h
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@ -0,0 +1,356 @@
/*
* Extensible Firmware Interface
* Based on 'Extensible Firmware Interface Specification' version 0.9,
* April 30, 1999
*
* Copyright (C) 1999 VA Linux Systems
* Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
* Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
* David Mosberger-Tang <davidm@hpl.hp.com>
* Stephane Eranian <eranian@hpl.hp.com>
*
* From include/linux/efi.h in kernel 4.1 with some additions/subtractions
*/
#ifndef _EFI_H
#define _EFI_H
#include <linux/string.h>
#include <linux/types.h>
struct efi_device_path;
#define EFI_SUCCESS 0
#define EFI_LOAD_ERROR (1 | (1UL << (BITS_PER_LONG - 1)))
#define EFI_INVALID_PARAMETER (2 | (1UL << (BITS_PER_LONG - 1)))
#define EFI_UNSUPPORTED (3 | (1UL << (BITS_PER_LONG - 1)))
#define EFI_BAD_BUFFER_SIZE (4 | (1UL << (BITS_PER_LONG - 1)))
#define EFI_BUFFER_TOO_SMALL (5 | (1UL << (BITS_PER_LONG - 1)))
#define EFI_NOT_READY (6 | (1UL << (BITS_PER_LONG - 1)))
#define EFI_DEVICE_ERROR (7 | (1UL << (BITS_PER_LONG - 1)))
#define EFI_WRITE_PROTECTED (8 | (1UL << (BITS_PER_LONG - 1)))
#define EFI_OUT_OF_RESOURCES (9 | (1UL << (BITS_PER_LONG - 1)))
#define EFI_NOT_FOUND (14 | (1UL << (BITS_PER_LONG - 1)))
#define EFI_SECURITY_VIOLATION (26 | (1UL << (BITS_PER_LONG - 1)))
typedef unsigned long efi_status_t;
typedef u64 efi_physical_addr_t;
typedef u64 efi_virtual_addr_t;
typedef void *efi_handle_t;
#define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
((efi_guid_t) \
{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, \
((a) >> 24) & 0xff, \
(b) & 0xff, ((b) >> 8) & 0xff, \
(c) & 0xff, ((c) >> 8) & 0xff, \
(d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) } })
/* Generic EFI table header */
struct efi_table_hdr {
u64 signature;
u32 revision;
u32 headersize;
u32 crc32;
u32 reserved;
};
/* Enumeration of memory types introduced in UEFI */
enum efi_mem_type {
EFI_RESERVED_MEMORY_TYPE,
/*
* The code portions of a loaded application.
* (Note that UEFI OS loaders are UEFI applications.)
*/
EFI_LOADER_CODE,
/*
* The data portions of a loaded application and
* the default data allocation type used by an application
* to allocate pool memory.
*/
EFI_LOADER_DATA,
/* The code portions of a loaded Boot Services Driver */
EFI_BOOT_SERVICES_CODE,
/*
* The data portions of a loaded Boot Serves Driver and
* the default data allocation type used by a Boot Services
* Driver to allocate pool memory.
*/
EFI_BOOT_SERVICES_DATA,
/* The code portions of a loaded Runtime Services Driver */
EFI_RUNTIME_SERVICES_CODE,
/*
* The data portions of a loaded Runtime Services Driver and
* the default data allocation type used by a Runtime Services
* Driver to allocate pool memory.
*/
EFI_RUNTIME_SERVICES_DATA,
/* Free (unallocated) memory */
EFI_CONVENTIONAL_MEMORY,
/* Memory in which errors have been detected */
EFI_UNUSABLE_MEMORY,
/* Memory that holds the ACPI tables */
EFI_ACPI_RECLAIM_MEMORY,
/* Address space reserved for use by the firmware */
EFI_ACPI_MEMORY_NVS,
/*
* Used by system firmware to request that a memory-mapped IO region
* be mapped by the OS to a virtual address so it can be accessed by
* EFI runtime services.
*/
EFI_MMAP_IO,
/*
* System memory-mapped IO region that is used to translate
* memory cycles to IO cycles by the processor.
*/
EFI_MMAP_IO_PORT,
/*
* Address space reserved by the firmware for code that is
* part of the processor.
*/
EFI_PAL_CODE,
EFI_MAX_MEMORY_TYPE,
EFI_TABLE_END, /* For efi_build_mem_table() */
};
/* Attribute values */
enum {
EFI_MEMORY_UC_SHIFT = 0, /* uncached */
EFI_MEMORY_WC_SHIFT = 1, /* write-coalescing */
EFI_MEMORY_WT_SHIFT = 2, /* write-through */
EFI_MEMORY_WB_SHIFT = 3, /* write-back */
EFI_MEMORY_UCE_SHIFT = 4, /* uncached, exported */
EFI_MEMORY_WP_SHIFT = 12, /* write-protect */
EFI_MEMORY_RP_SHIFT = 13, /* read-protect */
EFI_MEMORY_XP_SHIFT = 14, /* execute-protect */
EFI_MEMORY_RUNTIME_SHIFT = 63, /* range requires runtime mapping */
EFI_MEMORY_RUNTIME = 1ULL << EFI_MEMORY_RUNTIME_SHIFT,
EFI_MEM_DESC_VERSION = 1,
};
#define EFI_PAGE_SHIFT 12
#define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT)
struct efi_mem_desc {
u32 type;
u32 reserved;
efi_physical_addr_t physical_start;
efi_virtual_addr_t virtual_start;
u64 num_pages;
u64 attribute;
};
/* Allocation types for calls to boottime->allocate_pages*/
#define EFI_ALLOCATE_ANY_PAGES 0
#define EFI_ALLOCATE_MAX_ADDRESS 1
#define EFI_ALLOCATE_ADDRESS 2
#define EFI_MAX_ALLOCATE_TYPE 3
/* Types and defines for Time Services */
#define EFI_TIME_ADJUST_DAYLIGHT 0x1
#define EFI_TIME_IN_DAYLIGHT 0x2
#define EFI_UNSPECIFIED_TIMEZONE 0x07ff
struct efi_time {
u16 year;
u8 month;
u8 day;
u8 hour;
u8 minute;
u8 second;
u8 pad1;
u32 nanosecond;
s16 timezone;
u8 daylight;
u8 pad2;
};
struct efi_time_cap {
u32 resolution;
u32 accuracy;
u8 sets_to_zero;
};
enum efi_locate_search_type {
all_handles,
by_register_notify,
by_protocol
};
struct efi_open_protocol_info_entry {
efi_handle_t agent_handle;
efi_handle_t controller_handle;
u32 attributes;
u32 open_count;
};
enum efi_entry_t {
EFIET_END, /* Signals this is the last (empty) entry */
EFIET_MEMORY_MAP,
/* Number of entries */
EFIET_MEMORY_COUNT,
};
#define EFI_TABLE_VERSION 1
/**
* struct efi_info_hdr - Header for the EFI info table
*
* @version: EFI_TABLE_VERSION
* @hdr_size: Size of this struct in bytes
* @total_size: Total size of this header plus following data
* @spare: Spare space for expansion
*/
struct efi_info_hdr {
u32 version;
u32 hdr_size;
u32 total_size;
u32 spare[5];
};
/**
* struct efi_entry_hdr - Header for a table entry
*
* @type: enum eft_entry_t
* @size size of entry bytes excluding header and padding
* @addr: address of this entry (0 if it follows the header )
* @link: size of entry including header and padding
* @spare1: Spare space for expansion
* @spare2: Spare space for expansion
*/
struct efi_entry_hdr {
u32 type;
u32 size;
u64 addr;
u32 link;
u32 spare1;
u64 spare2;
};
/**
* struct efi_entry_memmap - a memory map table passed to U-Boot
*
* @version: EFI's memory map table version
* @desc_size: EFI's size of each memory descriptor
* @spare: Spare space for expansion
* @desc: An array of descriptors, each @desc_size bytes apart
*/
struct efi_entry_memmap {
u32 version;
u32 desc_size;
u64 spare;
struct efi_mem_desc desc[];
};
static inline struct efi_mem_desc *efi_get_next_mem_desc(
struct efi_entry_memmap *map, struct efi_mem_desc *desc)
{
return (struct efi_mem_desc *)((ulong)desc + map->desc_size);
}
struct efi_priv {
efi_handle_t parent_image;
struct efi_device_path *device_path;
struct efi_system_table *sys_table;
struct efi_boot_services *boot;
struct efi_runtime_services *run;
bool use_pool_for_malloc;
unsigned long ram_base;
unsigned int image_data_type;
struct efi_info_hdr *info;
unsigned int info_size;
void *next_hdr;
};
/* Base address of the EFI image */
extern char image_base[];
/**
* efi_get_sys_table() - Get access to the main EFI system table
*
* @return pointer to EFI system table
*/
struct efi_system_table *efi_get_sys_table(void);
/**
* efi_get_ram_base() - Find the base of RAM
*
* This is used when U-Boot is built as an EFI application.
*
* @return the base of RAM as known to U-Boot
*/
unsigned long efi_get_ram_base(void);
/**
* efi_init() - Set up ready for use of EFI boot services
*
* @priv: Pointer to our private EFI structure to fill in
* @banner: Banner to display when starting
* @image: The image handle passed to efi_main()
* @sys_table: The EFI system table pointer passed to efi_main()
*/
int efi_init(struct efi_priv *priv, const char *banner, efi_handle_t image,
struct efi_system_table *sys_table);
/**
* efi_malloc() - Allocate some memory from EFI
*
* @priv: Pointer to private EFI structure
* @size: Number of bytes to allocate
* @retp: Return EFI status result
* @return pointer to memory allocated, or NULL on error
*/
void *efi_malloc(struct efi_priv *priv, int size, efi_status_t *retp);
/**
* efi_free() - Free memory allocated from EFI
*
* @priv: Pointer to private EFI structure
* @ptr: Pointer to memory to free
*/
void efi_free(struct efi_priv *priv, void *ptr);
/**
* efi_puts() - Write out a string to the EFI console
*
* @priv: Pointer to private EFI structure
* @str: String to write (note this is a ASCII, not unicode)
*/
void efi_puts(struct efi_priv *priv, const char *str);
/**
* efi_putc() - Write out a character to the EFI console
*
* @priv: Pointer to private EFI structure
* @ch: Character to write (note this is not unicode)
*/
void efi_putc(struct efi_priv *priv, const char ch);
/**
* efi_info_get() - get an entry from an EFI table
*
* @type: Entry type to search for
* @datap: Returns pointer to entry data
* @sizep: Returns pointer to entry size
* @return 0 if OK, -ENODATA if there is no table, -ENOENT if there is no entry
* of the requested type, -EPROTONOSUPPORT if the table has the wrong version
*/
int efi_info_get(enum efi_entry_t type, void **datap, int *sizep);
/**
* efi_build_mem_table() - make a sorted copy of the memory table
*
* @map: Pointer to EFI memory map table
* @size: Size of table in bytes
* @skip_bs: True to skip boot-time memory and merge it with conventional
* memory. This will significantly reduce the number of table
* entries.
* @return pointer to the new table. It should be freed with free() by the
* caller
*/
void *efi_build_mem_table(struct efi_entry_memmap *map, int size, bool skip_bs);
#endif /* _LINUX_EFI_H */

244
include/efi_api.h
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/*
* Extensible Firmware Interface
* Based on 'Extensible Firmware Interface Specification' version 0.9,
* April 30, 1999
*
* Copyright (C) 1999 VA Linux Systems
* Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
* Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
* David Mosberger-Tang <davidm@hpl.hp.com>
* Stephane Eranian <eranian@hpl.hp.com>
*
* From include/linux/efi.h in kernel 4.1 with some additions/subtractions
*/
#ifndef _EFI_API_H
#define _EFI_API_H
#include <efi.h>
/* EFI Boot Services table */
struct efi_boot_services {
struct efi_table_hdr hdr;
void *raise_tpl;
void *restore_tpl;
efi_status_t (EFIAPI *allocate_pages)(int, int, unsigned long,
efi_physical_addr_t *);
efi_status_t (EFIAPI *free_pages)(efi_physical_addr_t, unsigned long);
efi_status_t (EFIAPI *get_memory_map)(unsigned long *memory_map_size,
struct efi_mem_desc *desc, unsigned long *key,
unsigned long *desc_size, u32 *desc_version);
efi_status_t (EFIAPI *allocate_pool)(int, unsigned long, void **);
efi_status_t (EFIAPI *free_pool)(void *);
void *create_event;
void *set_timer;
efi_status_t(EFIAPI *wait_for_event)(unsigned long number_of_events,
void *event, unsigned long *index);
void *signal_event;
void *close_event;
void *check_event;
void *install_protocol_interface;
void *reinstall_protocol_interface;
void *uninstall_protocol_interface;
efi_status_t (EFIAPI *handle_protocol)(efi_handle_t, efi_guid_t *,
void **);
void *reserved;
void *register_protocol_notify;
efi_status_t (EFIAPI *locate_handle)(
enum efi_locate_search_type search_type,
efi_guid_t *protocol, void *search_key,
unsigned long *buffer_size, efi_handle_t *buffer);
efi_status_t (EFIAPI *locate_device_path)(efi_guid_t *protocol,
struct efi_device_path **device_path,
efi_handle_t *device);
void *install_configuration_table;
efi_status_t (EFIAPI *load_image)(bool boot_policiy,
efi_handle_t parent_image,
struct efi_device_path *file_path, void *source_buffer,
unsigned long source_size, efi_handle_t *image);
efi_status_t (EFIAPI *start_image)(efi_handle_t handle,
unsigned long *exitdata_size,
s16 **exitdata);
efi_status_t (EFIAPI *exit)(efi_handle_t handle,
efi_status_t exit_status,
unsigned long exitdata_size, s16 *exitdata);
void *unload_image;
efi_status_t (EFIAPI *exit_boot_services)(efi_handle_t, unsigned long);
efi_status_t (EFIAPI *get_next_monotonic_count)(u64 *count);
efi_status_t (EFIAPI *stall)(unsigned long usecs);
void *set_watchdog_timer;
efi_status_t(EFIAPI *connect_controller)(efi_handle_t controller_handle,
efi_handle_t *driver_image_handle,
struct efi_device_path *remaining_device_path,
bool recursive);
void *disconnect_controller;
#define EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL 0x00000001
#define EFI_OPEN_PROTOCOL_GET_PROTOCOL 0x00000002
#define EFI_OPEN_PROTOCOL_TEST_PROTOCOL 0x00000004
#define EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER 0x00000008
#define EFI_OPEN_PROTOCOL_BY_DRIVER 0x00000010
#define EFI_OPEN_PROTOCOL_EXCLUSIVE 0x00000020
efi_status_t (EFIAPI *open_protocol)(efi_handle_t handle,
efi_guid_t *protocol, void **interface,
efi_handle_t agent_handle,
efi_handle_t controller_handle, u32 attributes);
void *close_protocol;
efi_status_t(EFIAPI *open_protocol_information)(efi_handle_t handle,
efi_guid_t *protocol,
struct efi_open_protocol_info_entry **entry_buffer,
unsigned long *entry_count);
efi_status_t (EFIAPI *protocols_per_handle)(efi_handle_t handle,
efi_guid_t ***protocol_buffer,
unsigned long *protocols_buffer_count);
efi_status_t (EFIAPI *locate_handle_buffer) (
enum efi_locate_search_type search_type,
efi_guid_t *protocol, void *search_key,
unsigned long *no_handles, efi_handle_t **buffer);
void *locate_protocol;
void *install_multiple_protocol_interfaces;
void *uninstall_multiple_protocol_interfaces;
void *calculate_crc32;
void *copy_mem;
void *set_mem;
void *create_event_ex;
};
/* Types and defines for EFI ResetSystem */
enum efi_reset_type {
EFI_RESET_COLD = 0,
EFI_RESET_WARM = 1,
EFI_RESET_SHUTDOWN = 2
};
/* EFI Runtime Services table */
#define EFI_RUNTIME_SERVICES_SIGNATURE 0x5652453544e5552ULL
#define EFI_RUNTIME_SERVICES_REVISION 0x00010000
struct efi_runtime_services {
struct efi_table_hdr hdr;
void *get_time;
void *set_time;
void *get_wakeup_time;
void *set_wakeup_time;
void *set_virtual_address_map;
void *convert_pointer;
efi_status_t (EFIAPI *get_variable)(s16 *variable_name,
efi_guid_t *vendor, u32 *attributes,
unsigned long *data_size, void *data);
efi_status_t (EFIAPI *get_next_variable)(
unsigned long *variable_name_size,
s16 *variable_name, efi_guid_t *vendor);
efi_status_t (EFIAPI *set_variable)(s16 *variable_name,
efi_guid_t *vendor, u32 attributes,
unsigned long data_size, void *data);
void *get_next_high_mono_count;
void (EFIAPI *reset_system)(enum efi_reset_type reset_type,
efi_status_t reset_status,
unsigned long data_size, void *reset_data);
void *update_capsule;
void *query_capsule_caps;
void *query_variable_info;
};
/* EFI Configuration Table and GUID definitions */
#define NULL_GUID \
EFI_GUID(0x00000000, 0x0000, 0x0000, 0x00, 0x00, \
0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
#define LOADED_IMAGE_PROTOCOL_GUID \
EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, \
0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
struct efi_system_table {
struct efi_table_hdr hdr;
unsigned long fw_vendor; /* physical addr of wchar_t vendor string */
u32 fw_revision;
unsigned long con_in_handle;
struct efi_simple_input_interface *con_in;
unsigned long con_out_handle;
struct efi_simple_text_output_protocol *con_out;
unsigned long stderr_handle;
unsigned long std_err;
struct efi_runtime_services *runtime;
struct efi_boot_services *boottime;
unsigned long nr_tables;
unsigned long tables;
};
struct efi_loaded_image {
u32 revision;
void *parent_handle;
struct efi_system_table *system_table;
void *device_handle;
void *file_path;
void *reserved;
u32 load_options_size;
void *load_options;
void *image_base;
aligned_u64 image_size;
unsigned int image_code_type;
unsigned int image_data_type;
unsigned long unload;
};
struct efi_device_path {
u8 type;
u8 sub_type;
u16 length;
};
struct simple_text_output_mode {
s32 max_mode;
s32 mode;
s32 attribute;
s32 cursor_column;
s32 cursor_row;
bool cursor_visible;
};
struct efi_simple_text_output_protocol {
void *reset;
efi_status_t (EFIAPI *output_string)(
struct efi_simple_text_output_protocol *this,
const unsigned short *str);
void *test_string;
efi_status_t(EFIAPI *query_mode)(
struct efi_simple_text_output_protocol *this,
unsigned long mode_number, unsigned long *columns,
unsigned long *rows);
efi_status_t(EFIAPI *set_mode)(
struct efi_simple_text_output_protocol *this,
unsigned long mode_number);
efi_status_t(EFIAPI *set_attribute)(
struct efi_simple_text_output_protocol *this,
unsigned long attribute);
efi_status_t(EFIAPI *clear_screen) (
struct efi_simple_text_output_protocol *this);
efi_status_t(EFIAPI *set_cursor_position) (
struct efi_simple_text_output_protocol *this,
unsigned long column, unsigned long row);
efi_status_t(EFIAPI *enable_cursor)(void *, bool enable);
struct simple_text_output_mode *mode;
};
struct efi_input_key {
u16 scan_code;
s16 unicode_char;
};
struct efi_simple_input_interface {
efi_status_t(EFIAPI *reset)(struct efi_simple_input_interface *this,
bool ExtendedVerification);
efi_status_t(EFIAPI *read_key_stroke)(
struct efi_simple_input_interface *this,
struct efi_input_key *key);
void *wait_for_key;
};
#endif

9
include/part_efi.h
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@ -18,6 +18,8 @@
#ifndef _DISK_PART_EFI_H
#define _DISK_PART_EFI_H
#include <efi.h>
#define MSDOS_MBR_SIGNATURE 0xAA55
#define EFI_PMBR_OSTYPE_EFI 0xEF
#define EFI_PMBR_OSTYPE_EFI_GPT 0xEE
@ -29,13 +31,6 @@
#define GPT_ENTRY_NUMBERS 128
#define GPT_ENTRY_SIZE 128
#define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
((efi_guid_t) \
{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
(b) & 0xff, ((b) >> 8) & 0xff, \
(c) & 0xff, ((c) >> 8) & 0xff, \
(d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
#define PARTITION_SYSTEM_GUID \
EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \
0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B)

2
lib/Kconfig
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@ -98,4 +98,6 @@ config ERRNO_STR
- if errno is null or positive number - a pointer to "Success" message
- if errno is negative - a pointer to errno related message
source lib/efi/Kconfig
endmenu

1
lib/Makefile
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@ -7,6 +7,7 @@
ifndef CONFIG_SPL_BUILD
obj-$(CONFIG_EFI) += efi/
obj-$(CONFIG_RSA) += rsa/
obj-$(CONFIG_LZMA) += lzma/
obj-$(CONFIG_LZO) += lzo/

33
lib/efi/Kconfig
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@ -0,0 +1,33 @@
config EFI
bool "Support running U-Boot from EFI"
depends on X86
help
U-Boot can be started from EFI on certain platforms. This allows
EFI to perform most of the system init and then jump to U-Boot for
final system boot. Another option is to run U-Boot as an EFI
application, with U-Boot using EFI's drivers instead of its own.
choice
prompt "Select EFI mode to use"
depends on X86 && EFI
config EFI_APP
bool "Support running as an EFI application"
help
Build U-Boot as an application which can be started from EFI. This
is useful for examining a platform in the early stages of porting
U-Boot to it. It allows only very basic functionality, such as a
command prompt and memory and I/O functions. Use 'reset' to return
to EFI.
config EFI_RAM_SIZE
hex "Amount of EFI RAM for U-Boot"
depends on EFI_APP
default 0x2000000
help
Set the amount of EFI RAM which is claimed by U-Boot for its own
use. U-Boot allocates this from EFI on start-up (along with a few
other smaller amounts) and it can never be increased after that.
It is used as the RAM size in with U-Boot.
endchoice

7
lib/efi/Makefile
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@ -0,0 +1,7 @@
#
# (C) Copyright 2015 Google, Inc
#
# SPDX-License-Identifier: GPL-2.0+
#
obj-$(CONFIG_EFI_APP) += efi_app.o efi.o

101
lib/efi/efi.c
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@ -0,0 +1,101 @@
/*
* Copyright (c) 2015 Google, Inc
*
* SPDX-License-Identifier: GPL-2.0+
*
* EFI information obtained here:
* http://wiki.phoenix.com/wiki/index.php/EFI_BOOT_SERVICES
*
* Common EFI functions
*/
#include <common.h>
#include <debug_uart.h>
#include <errno.h>
#include <linux/err.h>
#include <linux/types.h>
#include <efi.h>
#include <efi_api.h>
DECLARE_GLOBAL_DATA_PTR;
/*
* Unfortunately we cannot access any code outside what is built especially
* for the stub. lib/string.c is already being built for the U-Boot payload
* so it uses the wrong compiler flags. Add our own memset() here.
*/
static void efi_memset(void *ptr, int ch, int size)
{
char *dest = ptr;
while (size-- > 0)
*dest++ = ch;
}
/*
* Since the EFI stub cannot access most of the U-Boot code, add our own
* simple console output functions here. The EFI app will not use these since
* it can use the normal console.
*/
void efi_putc(struct efi_priv *priv, const char ch)
{
struct efi_simple_text_output_protocol *con = priv->sys_table->con_out;
uint16_t ucode[2];
ucode[0] = ch;
ucode[1] = '\0';
con->output_string(con, ucode);
}
void efi_puts(struct efi_priv *priv, const char *str)
{
while (*str)
efi_putc(priv, *str++);
}
int efi_init(struct efi_priv *priv, const char *banner, efi_handle_t image,
struct efi_system_table *sys_table)
{
efi_guid_t loaded_image_guid = LOADED_IMAGE_PROTOCOL_GUID;
struct efi_boot_services *boot = sys_table->boottime;
struct efi_loaded_image *loaded_image;
int ret;
efi_memset(priv, '\0', sizeof(*priv));
priv->sys_table = sys_table;
priv->boot = sys_table->boottime;
priv->parent_image = image;
priv->run = sys_table->runtime;
efi_puts(priv, "U-Boot EFI ");
efi_puts(priv, banner);
efi_putc(priv, ' ');
ret = boot->open_protocol(priv->parent_image, &loaded_image_guid,
(void **)&loaded_image, &priv->parent_image,
NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
if (ret) {
efi_puts(priv, "Failed to get loaded image protocol\n");
return ret;
}
priv->image_data_type = loaded_image->image_data_type;
return 0;
}
void *efi_malloc(struct efi_priv *priv, int size, efi_status_t *retp)
{
struct efi_boot_services *boot = priv->boot;
void *buf = NULL;
*retp = boot->allocate_pool(priv->image_data_type, size, &buf);
return buf;
}
void efi_free(struct efi_priv *priv, void *ptr)
{
struct efi_boot_services *boot = priv->boot;
boot->free_pool(ptr);
}

139
lib/efi/efi_app.c
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@ -0,0 +1,139 @@
/*
* Copyright (c) 2015 Google, Inc
*
* SPDX-License-Identifier: GPL-2.0+
*
* EFI information obtained here:
* http://wiki.phoenix.com/wiki/index.php/EFI_BOOT_SERVICES
*
* This file implements U-Boot running as an EFI application.
*/
#include <common.h>
#include <debug_uart.h>
#include <errno.h>
#include <linux/err.h>
#include <linux/types.h>
#include <efi.h>
#include <efi_api.h>
DECLARE_GLOBAL_DATA_PTR;
static struct efi_priv *global_priv;
struct efi_system_table *efi_get_sys_table(void)
{
return global_priv->sys_table;
}
unsigned long efi_get_ram_base(void)
{
return global_priv->ram_base;
}
static efi_status_t setup_memory(struct efi_priv *priv)
{
struct efi_boot_services *boot = priv->boot;
efi_physical_addr_t addr;
efi_status_t ret;
int pages;
/*
* Use global_data_ptr instead of gd since it is an assignment. There
* are very few assignments to global_data in U-Boot and this makes
* it easier to find them.
*/
global_data_ptr = efi_malloc(priv, sizeof(struct global_data), &ret);
if (!global_data_ptr)
return ret;
memset(gd, '\0', sizeof(*gd));
gd->malloc_base = (ulong)efi_malloc(priv, CONFIG_SYS_MALLOC_F_LEN,
&ret);
if (!gd->malloc_base)
return ret;
pages = CONFIG_EFI_RAM_SIZE >> 12;
/*
* Don't allocate any memory above 4GB. U-Boot is a 32-bit application
* so we want it to load below 4GB.
*/
addr = 1ULL << 32;
ret = boot->allocate_pages(EFI_ALLOCATE_MAX_ADDRESS,
priv->image_data_type, pages, &addr);
if (ret) {
printf("(using pool %lx) ", ret);
priv->ram_base = (ulong)efi_malloc(priv, CONFIG_EFI_RAM_SIZE,
&ret);
if (!priv->ram_base)
return ret;
priv->use_pool_for_malloc = true;
} else {
priv->ram_base = addr;
}
gd->ram_size = pages << 12;
return 0;
}
static void free_memory(struct efi_priv *priv)
{
struct efi_boot_services *boot = priv->boot;
if (priv->use_pool_for_malloc)
efi_free(priv, (void *)priv->ram_base);
else
boot->free_pages(priv->ram_base, gd->ram_size >> 12);
efi_free(priv, (void *)gd->malloc_base);
efi_free(priv, gd);
global_data_ptr = NULL;
}
/**
* efi_main() - Start an EFI image
*
* This function is called by our EFI start-up code. It handles running
* U-Boot. If it returns, EFI will continue. Another way to get back to EFI
* is via reset_cpu().
*/
efi_status_t efi_main(efi_handle_t image, struct efi_system_table *sys_table)
{
struct efi_priv local_priv, *priv = &local_priv;
efi_status_t ret;
/* Set up access to EFI data structures */
efi_init(priv, "App", image, sys_table);
global_priv = priv;
/*
* Set up the EFI debug UART so that printf() works. This is
* implemented in the EFI serial driver, serial_efi.c. The application
* can use printf() freely.
*/
debug_uart_init();
ret = setup_memory(priv);
if (ret) {
printf("Failed to set up memory: ret=%lx\n", ret);
return ret;
}
printf("starting\n");
board_init_f(GD_FLG_SKIP_RELOC);
board_init_r(NULL, 0);
free_memory(priv);
return EFI_SUCCESS;
}
void reset_cpu(ulong addr)
{
struct efi_priv *priv = global_priv;
free_memory(priv);
printf("U-Boot EFI exiting\n");
priv->boot->exit(priv->parent_image, EFI_SUCCESS, 0, NULL);
}
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