Contributors: 10
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Roy Franz |
125 |
37.43% |
3 |
13.64% |
| Huacai Chen |
119 |
35.63% |
3 |
13.64% |
| Matt Fleming |
28 |
8.38% |
2 |
9.09% |
| Ard Biesheuvel |
28 |
8.38% |
7 |
31.82% |
| Wang Yao |
17 |
5.09% |
2 |
9.09% |
| Kairui Song |
7 |
2.10% |
1 |
4.55% |
| Heiher |
7 |
2.10% |
1 |
4.55% |
| Heinrich Schuchardt |
1 |
0.30% |
1 |
4.55% |
| Joe Perches |
1 |
0.30% |
1 |
4.55% |
| Arvind Sankar |
1 |
0.30% |
1 |
4.55% |
| Total |
334 |
|
22 |
|
// SPDX-License-Identifier: GPL-2.0
/*
* Author: Yun Liu <liuyun@loongson.cn>
* Huacai Chen <chenhuacai@loongson.cn>
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
*/
#include <asm/efi.h>
#include <asm/addrspace.h>
#include "efistub.h"
#include "loongarch-stub.h"
extern int kernel_asize;
extern int kernel_fsize;
extern int kernel_entry;
/**
* efi_relocate_kernel() - copy memory area
* @image_addr: pointer to address of memory area to copy
* @image_size: size of memory area to copy
* @alloc_size: minimum size of memory to allocate, must be greater or
* equal to image_size
* @preferred_addr: preferred target address
* @alignment: minimum alignment of the allocated memory area. It
* should be a power of two.
* @min_addr: minimum target address
*
* Copy a memory area to a newly allocated memory area aligned according
* to @alignment but at least EFI_ALLOC_ALIGN. If the preferred address
* is not available, the allocated address will not be below @min_addr.
* On exit, @image_addr is updated to the target copy address that was used.
*
* This function is used to copy the Linux kernel verbatim. It does not apply
* any relocation changes.
*
* Return: status code
*/
static
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)
{
unsigned long cur_image_addr;
unsigned long new_addr = 0;
efi_status_t status;
unsigned long nr_pages;
efi_physical_addr_t efi_addr = preferred_addr;
if (!image_addr || !image_size || !alloc_size)
return EFI_INVALID_PARAMETER;
if (alloc_size < image_size)
return EFI_INVALID_PARAMETER;
cur_image_addr = *image_addr;
/*
* The EFI firmware loader could have placed the kernel image
* anywhere in memory, but the kernel has restrictions on the
* max physical address it can run at. Some architectures
* also have a preferred address, so first try to relocate
* to the preferred address. If that fails, allocate as low
* as possible while respecting the required alignment.
*/
nr_pages = round_up(alloc_size, EFI_ALLOC_ALIGN) / EFI_PAGE_SIZE;
status = efi_bs_call(allocate_pages, EFI_ALLOCATE_ADDRESS,
EFI_LOADER_DATA, nr_pages, &efi_addr);
new_addr = efi_addr;
/*
* If preferred address allocation failed allocate as low as
* possible.
*/
if (status != EFI_SUCCESS) {
status = efi_low_alloc_above(alloc_size, alignment, &new_addr,
min_addr);
}
if (status != EFI_SUCCESS) {
efi_err("Failed to allocate usable memory for kernel.\n");
return status;
}
/*
* We know source/dest won't overlap since both memory ranges
* have been allocated by UEFI, so we can safely use memcpy.
*/
memcpy((void *)new_addr, (void *)cur_image_addr, image_size);
efi_cache_sync_image(new_addr, image_size);
/* Return the new address of the relocated image. */
*image_addr = new_addr;
return status;
}
efi_status_t handle_kernel_image(unsigned long *image_addr,
unsigned long *image_size,
unsigned long *reserve_addr,
unsigned long *reserve_size,
efi_loaded_image_t *image,
efi_handle_t image_handle)
{
efi_status_t status;
unsigned long kernel_addr = 0;
kernel_addr = (unsigned long)image->image_base;
status = efi_relocate_kernel(&kernel_addr, kernel_fsize, kernel_asize,
EFI_KIMG_PREFERRED_ADDRESS, efi_get_kimg_min_align(), 0x0);
*image_addr = kernel_addr;
*image_size = kernel_asize;
return status;
}
unsigned long kernel_entry_address(unsigned long kernel_addr,
efi_loaded_image_t *image)
{
unsigned long base = (unsigned long)image->image_base;
return (unsigned long)&kernel_entry - base + kernel_addr;
}