nes-proj/drivers/cpu/x86/uefi/bootstrap_uefi.c

73 lines
2.8 KiB
C

/*
* Copyright (C) 2015, Intel Corporation. All rights reserved.
*
* 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. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
* COPYRIGHT HOLDER 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.
*/
#include <Uefi.h>
#include <Protocol/LoadedImage.h>
#define MAX_MEM_DESC 128
void start(void);
/* The section attribute below is copied from ATTR_BOOT_CODE in prot-domains.h.
* prot-domains.h includes stdlib.h which defines NULL. The UEFI headers also
* define NULL, which induces a warning when the compiler detects the conflict.
* To avoid that, we avoid including prot-domains.h from this file.
*/
EFI_STATUS EFIAPI __attribute__((section(".boot_text")))
uefi_start(IN EFI_HANDLE ImageHandle, IN EFI_SYSTEM_TABLE *SystemTable)
{
EFI_MEMORY_DESCRIPTOR mem_map[MAX_MEM_DESC];
UINTN mem_map_len = sizeof(mem_map);
UINTN mem_map_key;
UINTN mem_map_desc_sz;
UINT32 mem_map_rev;
EFI_STATUS res;
res = SystemTable->BootServices->GetMemoryMap(&mem_map_len,
mem_map,
&mem_map_key,
&mem_map_desc_sz,
&mem_map_rev);
if(res != EFI_SUCCESS) {
return EFI_ABORTED;
}
res = SystemTable->BootServices->ExitBootServices(ImageHandle, mem_map_key);
if(res != EFI_SUCCESS) {
return EFI_ABORTED;
}
start();
/* Should not be reachable: */
return EFI_SUCCESS;
}