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|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _DRIVERS_FIRMWARE_EFI_EFISTUB_H
#define _DRIVERS_FIRMWARE_EFI_EFISTUB_H
/* error code which can't be mistaken for valid address */
#define EFI_ERROR (~0UL)
/*
* __init annotations should not be used in the EFI stub, since the code is
* either included in the decompressor (x86, ARM) where they have no effect,
* or the whole stub is __init annotated at the section level (arm64), by
* renaming the sections, in which case the __init annotation will be
* redundant, and will result in section names like .init.init.text, and our
* linker script does not expect that.
*/
#undef __init
/*
* Allow the platform to override the allocation granularity: this allows
* systems that have the capability to run with a larger page size to deal
* with the allocations for initrd and fdt more efficiently.
*/
#ifndef EFI_ALLOC_ALIGN
#define EFI_ALLOC_ALIGN EFI_PAGE_SIZE
#endif
#if defined(CONFIG_ARM) || defined(CONFIG_X86)
#define __efistub_global __section(.data)
#else
#define __efistub_global
#endif
extern bool __pure nochunk(void);
extern bool __pure nokaslr(void);
extern bool __pure noinitrd(void);
extern bool __pure is_quiet(void);
extern bool __pure novamap(void);
extern __pure efi_system_table_t *efi_system_table(void);
#ifndef efi_bs_call
#define efi_bs_call(func, ...) efi_system_table()->boottime->func(__VA_ARGS__)
#endif
#ifndef efi_rt_call
#define efi_rt_call(func, ...) efi_system_table()->runtime->func(__VA_ARGS__)
#endif
#ifndef efi_is_native
#define efi_is_native() (true)
#endif
#ifndef efi_table_attr
#define efi_table_attr(inst, attr) (inst->attr)
#endif
#ifndef efi_call_proto
#define efi_call_proto(inst, func, ...) inst->func(inst, ##__VA_ARGS__)
#endif
#define pr_efi(msg) do { \
if (!is_quiet()) efi_printk("EFI stub: "msg); \
} while (0)
#define pr_efi_err(msg) efi_printk("EFI stub: ERROR: "msg)
/* Helper macros for the usual case of using simple C variables: */
#ifndef fdt_setprop_inplace_var
#define fdt_setprop_inplace_var(fdt, node_offset, name, var) \
fdt_setprop_inplace((fdt), (node_offset), (name), &(var), sizeof(var))
#endif
#ifndef fdt_setprop_var
#define fdt_setprop_var(fdt, node_offset, name, var) \
fdt_setprop((fdt), (node_offset), (name), &(var), sizeof(var))
#endif
#define get_efi_var(name, vendor, ...) \
efi_rt_call(get_variable, (efi_char16_t *)(name), \
(efi_guid_t *)(vendor), __VA_ARGS__)
#define set_efi_var(name, vendor, ...) \
efi_rt_call(set_variable, (efi_char16_t *)(name), \
(efi_guid_t *)(vendor), __VA_ARGS__)
#define efi_get_handle_at(array, idx) \
(efi_is_native() ? (array)[idx] \
: (efi_handle_t)(unsigned long)((u32 *)(array))[idx])
#define efi_get_handle_num(size) \
((size) / (efi_is_native() ? sizeof(efi_handle_t) : sizeof(u32)))
#define for_each_efi_handle(handle, array, size, i) \
for (i = 0; \
i < efi_get_handle_num(size) && \
((handle = efi_get_handle_at((array), i)) || true); \
i++)
/*
* 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
/*
* The type of search to perform when calling boottime->locate_handle
*/
#define EFI_LOCATE_ALL_HANDLES 0
#define EFI_LOCATE_BY_REGISTER_NOTIFY 1
#define EFI_LOCATE_BY_PROTOCOL 2
struct efi_boot_memmap {
efi_memory_desc_t **map;
unsigned long *map_size;
unsigned long *desc_size;
u32 *desc_ver;
unsigned long *key_ptr;
unsigned long *buff_size;
};
typedef struct efi_generic_dev_path efi_device_path_protocol_t;
/*
* EFI Boot Services table
*/
union efi_boot_services {
struct {
efi_table_hdr_t 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 *, void *,
unsigned long *,
unsigned long *, u32 *);
efi_status_t (__efiapi *allocate_pool)(int, unsigned long,
void **);
efi_status_t (__efiapi *free_pool)(void *);
void *create_event;
void *set_timer;
void *wait_for_event;
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)(int, efi_guid_t *,
void *, unsigned long *,
efi_handle_t *);
efi_status_t (__efiapi *locate_device_path)(efi_guid_t *,
efi_device_path_protocol_t **,
efi_handle_t *);
efi_status_t (__efiapi *install_configuration_table)(efi_guid_t *,
void *);
void *load_image;
void *start_image;
efi_status_t __noreturn (__efiapi *exit)(efi_handle_t,
efi_status_t,
unsigned long,
efi_char16_t *);
void *unload_image;
efi_status_t (__efiapi *exit_boot_services)(efi_handle_t,
unsigned long);
void *get_next_monotonic_count;
void *stall;
void *set_watchdog_timer;
void *connect_controller;
efi_status_t (__efiapi *disconnect_controller)(efi_handle_t,
efi_handle_t,
efi_handle_t);
void *open_protocol;
void *close_protocol;
void *open_protocol_information;
void *protocols_per_handle;
void *locate_handle_buffer;
efi_status_t (__efiapi *locate_protocol)(efi_guid_t *, void *,
void **);
void *install_multiple_protocol_interfaces;
void *uninstall_multiple_protocol_interfaces;
void *calculate_crc32;
void *copy_mem;
void *set_mem;
void *create_event_ex;
};
struct {
efi_table_hdr_t hdr;
u32 raise_tpl;
u32 restore_tpl;
u32 allocate_pages;
u32 free_pages;
u32 get_memory_map;
u32 allocate_pool;
u32 free_pool;
u32 create_event;
u32 set_timer;
u32 wait_for_event;
u32 signal_event;
u32 close_event;
u32 check_event;
u32 install_protocol_interface;
u32 reinstall_protocol_interface;
u32 uninstall_protocol_interface;
u32 handle_protocol;
u32 __reserved;
u32 register_protocol_notify;
u32 locate_handle;
u32 locate_device_path;
u32 install_configuration_table;
u32 load_image;
u32 start_image;
u32 exit;
u32 unload_image;
u32 exit_boot_services;
u32 get_next_monotonic_count;
u32 stall;
u32 set_watchdog_timer;
u32 connect_controller;
u32 disconnect_controller;
u32 open_protocol;
u32 close_protocol;
u32 open_protocol_information;
u32 protocols_per_handle;
u32 locate_handle_buffer;
u32 locate_protocol;
u32 install_multiple_protocol_interfaces;
u32 uninstall_multiple_protocol_interfaces;
u32 calculate_crc32;
u32 copy_mem;
u32 set_mem;
u32 create_event_ex;
} mixed_mode;
};
typedef union efi_uga_draw_protocol efi_uga_draw_protocol_t;
union efi_uga_draw_protocol {
struct {
efi_status_t (__efiapi *get_mode)(efi_uga_draw_protocol_t *,
u32*, u32*, u32*, u32*);
void *set_mode;
void *blt;
};
struct {
u32 get_mode;
u32 set_mode;
u32 blt;
} mixed_mode;
};
union efi_simple_text_output_protocol {
struct {
void *reset;
efi_status_t (__efiapi *output_string)(efi_simple_text_output_protocol_t *,
efi_char16_t *);
void *test_string;
};
struct {
u32 reset;
u32 output_string;
u32 test_string;
} mixed_mode;
};
#define PIXEL_RGB_RESERVED_8BIT_PER_COLOR 0
#define PIXEL_BGR_RESERVED_8BIT_PER_COLOR 1
#define PIXEL_BIT_MASK 2
#define PIXEL_BLT_ONLY 3
#define PIXEL_FORMAT_MAX 4
typedef struct {
u32 red_mask;
u32 green_mask;
u32 blue_mask;
u32 reserved_mask;
} efi_pixel_bitmask_t;
typedef struct {
u32 version;
u32 horizontal_resolution;
u32 vertical_resolution;
int pixel_format;
efi_pixel_bitmask_t pixel_information;
u32 pixels_per_scan_line;
} efi_graphics_output_mode_info_t;
typedef union efi_graphics_output_protocol_mode efi_graphics_output_protocol_mode_t;
union efi_graphics_output_protocol_mode {
struct {
u32 max_mode;
u32 mode;
efi_graphics_output_mode_info_t *info;
unsigned long size_of_info;
efi_physical_addr_t frame_buffer_base;
unsigned long frame_buffer_size;
};
struct {
u32 max_mode;
u32 mode;
u32 info;
u32 size_of_info;
u64 frame_buffer_base;
u32 frame_buffer_size;
} mixed_mode;
};
typedef union efi_graphics_output_protocol efi_graphics_output_protocol_t;
union efi_graphics_output_protocol {
struct {
efi_status_t (__efiapi *query_mode)(efi_graphics_output_protocol_t *,
u32, unsigned long *,
efi_graphics_output_mode_info_t **);
efi_status_t (__efiapi *set_mode) (efi_graphics_output_protocol_t *, u32);
void *blt;
efi_graphics_output_protocol_mode_t *mode;
};
struct {
u32 query_mode;
u32 set_mode;
u32 blt;
u32 mode;
} mixed_mode;
};
typedef union {
struct {
u32 revision;
efi_handle_t parent_handle;
efi_system_table_t *system_table;
efi_handle_t 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;
efi_status_t (__efiapi *unload)(efi_handle_t image_handle);
};
struct {
u32 revision;
u32 parent_handle;
u32 system_table;
u32 device_handle;
u32 file_path;
u32 reserved;
u32 load_options_size;
u32 load_options;
u32 image_base;
__aligned_u64 image_size;
u32 image_code_type;
u32 image_data_type;
u32 unload;
} mixed_mode;
} efi_loaded_image_t;
typedef struct {
u64 size;
u64 file_size;
u64 phys_size;
efi_time_t create_time;
efi_time_t last_access_time;
efi_time_t modification_time;
__aligned_u64 attribute;
efi_char16_t filename[];
} efi_file_info_t;
typedef struct efi_file_protocol efi_file_protocol_t;
struct efi_file_protocol {
u64 revision;
efi_status_t (__efiapi *open) (efi_file_protocol_t *,
efi_file_protocol_t **,
efi_char16_t *, u64, u64);
efi_status_t (__efiapi *close) (efi_file_protocol_t *);
efi_status_t (__efiapi *delete) (efi_file_protocol_t *);
efi_status_t (__efiapi *read) (efi_file_protocol_t *,
unsigned long *, void *);
efi_status_t (__efiapi *write) (efi_file_protocol_t *,
unsigned long, void *);
efi_status_t (__efiapi *get_position)(efi_file_protocol_t *, u64 *);
efi_status_t (__efiapi *set_position)(efi_file_protocol_t *, u64);
efi_status_t (__efiapi *get_info) (efi_file_protocol_t *,
efi_guid_t *, unsigned long *,
void *);
efi_status_t (__efiapi *set_info) (efi_file_protocol_t *,
efi_guid_t *, unsigned long,
void *);
efi_status_t (__efiapi *flush) (efi_file_protocol_t *);
};
typedef struct efi_simple_file_system_protocol efi_simple_file_system_protocol_t;
struct efi_simple_file_system_protocol {
u64 revision;
int (__efiapi *open_volume)(efi_simple_file_system_protocol_t *,
efi_file_protocol_t **);
};
#define EFI_FILE_MODE_READ 0x0000000000000001
#define EFI_FILE_MODE_WRITE 0x0000000000000002
#define EFI_FILE_MODE_CREATE 0x8000000000000000
typedef enum {
EfiPciIoWidthUint8,
EfiPciIoWidthUint16,
EfiPciIoWidthUint32,
EfiPciIoWidthUint64,
EfiPciIoWidthFifoUint8,
EfiPciIoWidthFifoUint16,
EfiPciIoWidthFifoUint32,
EfiPciIoWidthFifoUint64,
EfiPciIoWidthFillUint8,
EfiPciIoWidthFillUint16,
EfiPciIoWidthFillUint32,
EfiPciIoWidthFillUint64,
EfiPciIoWidthMaximum
} EFI_PCI_IO_PROTOCOL_WIDTH;
typedef enum {
EfiPciIoAttributeOperationGet,
EfiPciIoAttributeOperationSet,
EfiPciIoAttributeOperationEnable,
EfiPciIoAttributeOperationDisable,
EfiPciIoAttributeOperationSupported,
EfiPciIoAttributeOperationMaximum
} EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
typedef struct {
u32 read;
u32 write;
} efi_pci_io_protocol_access_32_t;
typedef union efi_pci_io_protocol efi_pci_io_protocol_t;
typedef
efi_status_t (__efiapi *efi_pci_io_protocol_cfg_t)(efi_pci_io_protocol_t *,
EFI_PCI_IO_PROTOCOL_WIDTH,
u32 offset,
unsigned long count,
void *buffer);
typedef struct {
void *read;
void *write;
} efi_pci_io_protocol_access_t;
typedef struct {
efi_pci_io_protocol_cfg_t read;
efi_pci_io_protocol_cfg_t write;
} efi_pci_io_protocol_config_access_t;
union efi_pci_io_protocol {
struct {
void *poll_mem;
void *poll_io;
efi_pci_io_protocol_access_t mem;
efi_pci_io_protocol_access_t io;
efi_pci_io_protocol_config_access_t pci;
void *copy_mem;
void *map;
void *unmap;
void *allocate_buffer;
void *free_buffer;
void *flush;
efi_status_t (__efiapi *get_location)(efi_pci_io_protocol_t *,
unsigned long *segment_nr,
unsigned long *bus_nr,
unsigned long *device_nr,
unsigned long *func_nr);
void *attributes;
void *get_bar_attributes;
void *set_bar_attributes;
uint64_t romsize;
void *romimage;
};
struct {
u32 poll_mem;
u32 poll_io;
efi_pci_io_protocol_access_32_t mem;
efi_pci_io_protocol_access_32_t io;
efi_pci_io_protocol_access_32_t pci;
u32 copy_mem;
u32 map;
u32 unmap;
u32 allocate_buffer;
u32 free_buffer;
u32 flush;
u32 get_location;
u32 attributes;
u32 get_bar_attributes;
u32 set_bar_attributes;
u64 romsize;
u32 romimage;
} mixed_mode;
};
#define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
#define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
#define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
#define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
#define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
#define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
#define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
#define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
#define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
#define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
#define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
#define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
#define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
#define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
#define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
#define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
#define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
#define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
#define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
struct efi_dev_path;
typedef union apple_properties_protocol apple_properties_protocol_t;
union apple_properties_protocol {
struct {
unsigned long version;
efi_status_t (__efiapi *get)(apple_properties_protocol_t *,
struct efi_dev_path *,
efi_char16_t *, void *, u32 *);
efi_status_t (__efiapi *set)(apple_properties_protocol_t *,
struct efi_dev_path *,
efi_char16_t *, void *, u32);
efi_status_t (__efiapi *del)(apple_properties_protocol_t *,
struct efi_dev_path *,
efi_char16_t *);
efi_status_t (__efiapi *get_all)(apple_properties_protocol_t *,
void *buffer, u32 *);
};
struct {
u32 version;
u32 get;
u32 set;
u32 del;
u32 get_all;
} mixed_mode;
};
typedef u32 efi_tcg2_event_log_format;
typedef union efi_tcg2_protocol efi_tcg2_protocol_t;
union efi_tcg2_protocol {
struct {
void *get_capability;
efi_status_t (__efiapi *get_event_log)(efi_handle_t,
efi_tcg2_event_log_format,
efi_physical_addr_t *,
efi_physical_addr_t *,
efi_bool_t *);
void *hash_log_extend_event;
void *submit_command;
void *get_active_pcr_banks;
void *set_active_pcr_banks;
void *get_result_of_set_active_pcr_banks;
};
struct {
u32 get_capability;
u32 get_event_log;
u32 hash_log_extend_event;
u32 submit_command;
u32 get_active_pcr_banks;
u32 set_active_pcr_banks;
u32 get_result_of_set_active_pcr_banks;
} mixed_mode;
};
typedef union efi_load_file_protocol efi_load_file_protocol_t;
typedef union efi_load_file_protocol efi_load_file2_protocol_t;
union efi_load_file_protocol {
struct {
efi_status_t (__efiapi *load_file)(efi_load_file_protocol_t *,
efi_device_path_protocol_t *,
bool, unsigned long *, void *);
};
struct {
u32 load_file;
} mixed_mode;
};
void efi_pci_disable_bridge_busmaster(void);
typedef efi_status_t (*efi_exit_boot_map_processing)(
struct efi_boot_memmap *map,
void *priv);
efi_status_t efi_exit_boot_services(void *handle,
struct efi_boot_memmap *map,
void *priv,
efi_exit_boot_map_processing priv_func);
void efi_char16_printk(efi_char16_t *);
efi_status_t allocate_new_fdt_and_exit_boot(void *handle,
unsigned long *new_fdt_addr,
unsigned long max_addr,
u64 initrd_addr, u64 initrd_size,
char *cmdline_ptr,
unsigned long fdt_addr,
unsigned long fdt_size);
void *get_fdt(unsigned long *fdt_size);
void efi_get_virtmap(efi_memory_desc_t *memory_map, unsigned long map_size,
unsigned long desc_size, efi_memory_desc_t *runtime_map,
int *count);
efi_status_t efi_get_random_bytes(unsigned long size, u8 *out);
efi_status_t efi_random_alloc(unsigned long size, unsigned long align,
unsigned long *addr, unsigned long random_seed);
efi_status_t check_platform_features(void);
void *get_efi_config_table(efi_guid_t guid);
void efi_printk(char *str);
void efi_free(unsigned long size, unsigned long addr);
char *efi_convert_cmdline(efi_loaded_image_t *image, int *cmd_line_len,
unsigned long max_addr);
efi_status_t efi_get_memory_map(struct efi_boot_memmap *map);
efi_status_t efi_low_alloc_above(unsigned long size, unsigned long align,
unsigned long *addr, unsigned long min);
static inline
efi_status_t efi_low_alloc(unsigned long size, unsigned long align,
unsigned long *addr)
{
/*
* Don't allocate at 0x0. It will confuse code that
* checks pointers against NULL. Skip the first 8
* bytes so we start at a nice even number.
*/
return efi_low_alloc_above(size, align, addr, 0x8);
}
efi_status_t efi_allocate_pages(unsigned long size, unsigned long *addr,
unsigned long max);
efi_status_t efi_relocate_kernel(unsigned long *image_addr,
unsigned long image_size,
unsigned long alloc_size,
unsigned long preferred_addr,
unsigned long alignment,
unsigned long min_addr);
efi_status_t efi_parse_options(char const *cmdline);
void efi_parse_option_graphics(char *option);
efi_status_t efi_setup_gop(struct screen_info *si, efi_guid_t *proto,
unsigned long size);
efi_status_t handle_cmdline_files(efi_loaded_image_t *image,
const efi_char16_t *optstr,
int optstr_size,
unsigned long soft_limit,
unsigned long hard_limit,
unsigned long *load_addr,
unsigned long *load_size);
static inline efi_status_t efi_load_dtb(efi_loaded_image_t *image,
unsigned long *load_addr,
unsigned long *load_size)
{
return handle_cmdline_files(image, L"dtb=", sizeof(L"dtb=") - 2,
ULONG_MAX, ULONG_MAX, load_addr, load_size);
}
static inline efi_status_t efi_load_initrd(efi_loaded_image_t *image,
unsigned long *load_addr,
unsigned long *load_size,
unsigned long soft_limit,
unsigned long hard_limit)
{
if (!IS_ENABLED(CONFIG_EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER))
return EFI_SUCCESS;
return handle_cmdline_files(image, L"initrd=", sizeof(L"initrd=") - 2,
soft_limit, hard_limit, load_addr, load_size);
}
efi_status_t efi_load_initrd_dev_path(unsigned long *load_addr,
unsigned long *load_size,
unsigned long max);
#endif
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