288 lines
10 KiB
C
288 lines
10 KiB
C
/*
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* Copyright (c) 2011 - 2021, Intel Corporation
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products
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* derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This file contains some wrappers around the gnu-efi functions. As
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* we're not going through uefi_call_wrapper() directly, this allows
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* us to get some type-safety for function call arguments and for the
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* compiler to check that the number of function call arguments is
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* correct.
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*
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* It's also a good place to document the EFI interface.
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*/
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#ifndef __EFILINUX_H__
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#define __EFILINUX_H__
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#define EFILINUX_VERSION_MAJOR 1
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#define EFILINUX_VERSION_MINOR 0
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#define MEM_ADDR_1MB (1U << 20U)
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#define MEM_ADDR_4GB (0xFFFFFFFFU)
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extern EFI_SYSTEM_TABLE *sys_table;
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extern EFI_BOOT_SERVICES *boot;
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extern EFI_RUNTIME_SERVICES *runtime;
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extern EFI_STATUS
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emalloc_reserved_aligned(EFI_PHYSICAL_ADDRESS *addr, UINTN size, UINTN align,
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EFI_PHYSICAL_ADDRESS minaddr, EFI_PHYSICAL_ADDRESS maxaddr);
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/**
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* allocate_pages - Allocate memory pages from the system
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* @atype: type of allocation to perform
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* @mtype: type of memory to allocate
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* @num_pages: number of contiguous 4KB pages to allocate
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* @memory: used to return the address of allocated pages
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*
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* Allocate @num_pages physically contiguous pages from the system
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* memory and return a pointer to the base of the allocation in
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* @memory if the allocation succeeds. On success, the firmware memory
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* map is updated accordingly.
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*
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* If @atype is AllocateAddress then, on input, @memory specifies the
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* address at which to attempt to allocate the memory pages.
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*/
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static inline EFI_STATUS
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allocate_pages(EFI_ALLOCATE_TYPE atype, EFI_MEMORY_TYPE mtype,
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UINTN num_pages, EFI_PHYSICAL_ADDRESS *memory)
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{
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return uefi_call_wrapper(boot->AllocatePages, 4, atype,
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mtype, num_pages, memory);
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}
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/**
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* free_pages - Return memory allocated by allocate_pages() to the firmware
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* @memory: physical base address of the page range to be freed
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* @num_pages: number of contiguous 4KB pages to free
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*
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* On success, the firmware memory map is updated accordingly.
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*/
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static inline EFI_STATUS
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free_pages(EFI_PHYSICAL_ADDRESS memory, UINTN num_pages)
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{
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return uefi_call_wrapper(boot->FreePages, 2, memory, num_pages);
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}
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/**
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* allocate_pool - Allocate pool memory
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* @type: the type of pool to allocate
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* @size: number of bytes to allocate from pool of @type
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* @buffer: used to return the address of allocated memory
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*
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* Allocate memory from pool of @type. If the pool needs more memory
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* pages are allocated from EfiConventionalMemory in order to grow the
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* pool.
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*
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* All allocations are eight-byte aligned.
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*/
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static inline EFI_STATUS
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allocate_pool(EFI_MEMORY_TYPE type, UINTN size, void **buffer)
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{
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return uefi_call_wrapper(boot->AllocatePool, 3, type, size, buffer);
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}
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/**
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* free_pool - Return pool memory to the system
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* @buffer: the buffer to free
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*
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* Return @buffer to the system. The returned memory is marked as
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* EfiConventionalMemory.
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*/
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static inline EFI_STATUS free_pool(void *buffer)
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{
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return uefi_call_wrapper(boot->FreePool, 1, buffer);
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}
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/**
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* get_memory_map - Return the current memory map
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* @size: the size in bytes of @map
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* @map: buffer to hold the current memory map
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* @key: used to return the key for the current memory map
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* @descr_size: used to return the size in bytes of EFI_MEMORY_DESCRIPTOR
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* @descr_version: used to return the version of EFI_MEMORY_DESCRIPTOR
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*
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* Get a copy of the current memory map. The memory map is an array of
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* EFI_MEMORY_DESCRIPTORs. An EFI_MEMORY_DESCRIPTOR describes a
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* contiguous block of memory.
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*
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* On success, @key is updated to contain an identifer for the current
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* memory map. The firmware's key is changed every time something in
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* the memory map changes. @size is updated to indicate the size of
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* the memory map pointed to by @map.
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*
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* @descr_size and @descr_version are used to ensure backwards
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* compatibility with future changes made to the EFI_MEMORY_DESCRIPTOR
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* structure. @descr_size MUST be used when the size of an
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* EFI_MEMORY_DESCRIPTOR is used in a calculation, e.g when iterating
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* over an array of EFI_MEMORY_DESCRIPTORs.
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*
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* On failure, and if the buffer pointed to by @map is too small to
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* hold the memory map, EFI_BUFFER_TOO_SMALL is returned and @size is
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* updated to reflect the size of a buffer required to hold the memory
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* map.
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*/
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static inline EFI_STATUS
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get_memory_map(UINTN *size, EFI_MEMORY_DESCRIPTOR *map, UINTN *key,
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UINTN *descr_size, UINT32 *descr_version)
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{
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return uefi_call_wrapper(boot->GetMemoryMap, 5, size, map,
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key, descr_size, descr_version);
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}
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/**
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* exit_boot_serivces - Terminate all boot services
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* @image: firmware-allocated handle that identifies the image
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* @key: key to the latest memory map
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*
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* This function is called when efilinux wants to take complete
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* control of the system. efilinux should not make calls to boot time
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* services after this function is called.
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*/
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static inline EFI_STATUS
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exit_boot_services(EFI_HANDLE image, UINTN key)
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{
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return uefi_call_wrapper(boot->ExitBootServices, 2, image, key);
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}
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/**
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* handle_protocol - Query @handle to see if it supports @protocol
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* @handle: the handle being queried
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* @protocol: the GUID of the protocol
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* @interface: used to return the protocol interface
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*
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* Query @handle to see if @protocol is supported. If it is supported,
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* @interface contains the protocol interface.
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*/
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static inline EFI_STATUS
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handle_protocol(EFI_HANDLE handle, EFI_GUID *protocol, void **interface)
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{
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return uefi_call_wrapper(boot->HandleProtocol, 3,
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handle, protocol, interface);
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}
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/*
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* emalloc_reserved_mem - it is called to allocate memory hypervisor itself
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* and trampoline code, and mark the allocate memory as EfiReserved memory
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* type so that Service VM won't touch it during boot.
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* @addr: a pointer to the allocated address on success
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* @size: size in bytes of the requested allocation
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* @max_addr: the allocated memory must be no more than this threshold
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*/
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static inline EFI_STATUS emalloc_reserved_mem(EFI_PHYSICAL_ADDRESS *addr,
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UINTN size, EFI_PHYSICAL_ADDRESS max_addr)
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{
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*addr = max_addr;
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return allocate_pages(AllocateMaxAddress, EfiReservedMemoryType,
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EFI_SIZE_TO_PAGES(size), addr);
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}
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/*
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* emalloc_fixed_addr - it is called to allocate memory hypervisor itself
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* when CONFIG_RELOC config is NOT enable.And mark the allocated memory as
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* EfiReserved memory type so that Service VM won't touch it during boot.
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* @addr: a pointer to the allocated address on success
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* @size: size in bytes of the requested allocation
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*/
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static inline EFI_STATUS emalloc_fixed_addr(EFI_PHYSICAL_ADDRESS *addr,
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UINTN size, EFI_PHYSICAL_ADDRESS fixed_addr)
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{
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*addr = fixed_addr;
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return allocate_pages(AllocateAddress, EfiReservedMemoryType,
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EFI_SIZE_TO_PAGES(size), addr);
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}
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static inline EFI_STATUS get_variable(const CHAR16 *name, EFI_GUID *guid, UINT32 *attrs, UINTN *size, void *data)
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{
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return uefi_call_wrapper(runtime->GetVariable, 5, name, guid, attrs, size, data);
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}
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static inline EFI_STATUS set_variable(const CHAR16 *name, EFI_GUID *guid, UINT32 attrs, UINTN size, void *data)
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{
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return uefi_call_wrapper(runtime->SetVariable, 5, name, guid, attrs, size, data);
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}
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/**
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* exit - Terminate a loaded EFI image
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* @image: firmware-allocated handle that identifies the image
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* @status: the image's exit code
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* @size: size in bytes of @reason. Ignored if @status is EFI_SUCCESS
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* @reason: a NUL-terminated status string, optionally followed by binary data
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*
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* This function terminates @image and returns control to the boot
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* services. This function MUST NOT be called until all loaded child
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* images have exited. All memory allocated by the image must be freed
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* before calling this function, apart from the buffer @reason, which
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* will be freed by the firmware.
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*/
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static inline EFI_STATUS
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exit(EFI_HANDLE image, EFI_STATUS status, UINTN size, CHAR16 *reason)
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{
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return uefi_call_wrapper(boot->Exit, 4, image, status, size, reason);
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}
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#define PAGE_SIZE 4096
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static const CHAR16 *memory_types[] = {
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L"EfiReservedMemoryType",
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L"EfiLoaderCode",
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L"EfiLoaderData",
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L"EfiBootServicesCode",
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L"EfiBootServicesData",
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L"EfiRuntimeServicesCode",
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L"EfiRuntimeServicesData",
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L"EfiConventionalMemory",
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L"EfiUnusableMemory",
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L"EfiACPIReclaimMemory",
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L"EfiACPIMemoryNVS",
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L"EfiMemoryMappedIO",
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L"EfiMemoryMappedIOPortSpace",
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L"EfiPalCode",
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};
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static inline const CHAR16 *memory_type_to_str(UINT32 type)
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{
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if (type > sizeof(memory_types)/sizeof(CHAR16 *))
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return L"Unknown";
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return memory_types[type];
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}
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extern EFI_STATUS memory_map(EFI_MEMORY_DESCRIPTOR **map_buf,
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UINTN *map_size, UINTN *map_key,
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UINTN *desc_size, UINT32 *desc_version);
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#endif /* __EFILINUX_H__ */
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