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efi: Move relocate_kernel() to shared file.

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The relocate_kernel() function will be generalized and used
by all architectures, as they all have similar requirements.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
This commit is contained in:
Roy Franz 2013-09-22 15:45:31 -07:00 committed by Matt Fleming
parent 38dd9c02c3
commit c6866d7238
2 changed files with 35 additions and 34 deletions
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34
arch/x86/boot/compressed/eboot.c
View File

@ -677,40 +677,6 @@ free_mem_map:
return status;
}
static efi_status_t relocate_kernel(struct setup_header *hdr)
{
unsigned long start, nr_pages;
efi_status_t status;
/*
* The EFI firmware loader could have placed the kernel image
* anywhere in memory, but the kernel has various restrictions
* on the max physical address it can run at. Attempt to move
* the kernel to boot_params.pref_address, or as low as
* possible.
*/
start = hdr->pref_address;
nr_pages = round_up(hdr->init_size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
status = efi_call_phys4(sys_table->boottime->allocate_pages,
EFI_ALLOCATE_ADDRESS, EFI_LOADER_DATA,
nr_pages, &start);
if (status != EFI_SUCCESS) {
status = efi_low_alloc(sys_table, hdr->init_size,
hdr->kernel_alignment, &start);
if (status != EFI_SUCCESS)
efi_printk(sys_table, "Failed to alloc mem for kernel\n");
}
if (status == EFI_SUCCESS)
memcpy((void *)start, (void *)(unsigned long)hdr->code32_start,
hdr->init_size);
hdr->pref_address = hdr->code32_start;
hdr->code32_start = (__u32)start;
return status;
}
/*
* On success we return a pointer to a boot_params structure, and NULL

35
drivers/firmware/efi/efi-stub-helper.c
View File

@ -485,3 +485,38 @@ fail:
return status;
}
static efi_status_t relocate_kernel(struct setup_header *hdr)
{
unsigned long start, nr_pages;
efi_status_t status;
/*
* The EFI firmware loader could have placed the kernel image
* anywhere in memory, but the kernel has various restrictions
* on the max physical address it can run at. Attempt to move
* the kernel to boot_params.pref_address, or as low as
* possible.
*/
start = hdr->pref_address;
nr_pages = round_up(hdr->init_size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
status = efi_call_phys4(sys_table->boottime->allocate_pages,
EFI_ALLOCATE_ADDRESS, EFI_LOADER_DATA,
nr_pages, &start);
if (status != EFI_SUCCESS) {
status = efi_low_alloc(sys_table, hdr->init_size,
hdr->kernel_alignment, &start);
if (status != EFI_SUCCESS)
efi_printk(sys_table, "Failed to alloc mem for kernel\n");
}
if (status == EFI_SUCCESS)
memcpy((void *)start, (void *)(unsigned long)hdr->code32_start,
hdr->init_size);
hdr->pref_address = hdr->code32_start;
hdr->code32_start = (__u32)start;
return status;
}