summaryrefslogtreecommitdiff
path: root/drivers/firmware/efi/libstub/arm32-stub.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/firmware/efi/libstub/arm32-stub.c')
-rw-r--r--drivers/firmware/efi/libstub/arm32-stub.c45
1 files changed, 6 insertions, 39 deletions
diff --git a/drivers/firmware/efi/libstub/arm32-stub.c b/drivers/firmware/efi/libstub/arm32-stub.c
index b038afe2ee7a..40243f524556 100644
--- a/drivers/firmware/efi/libstub/arm32-stub.c
+++ b/drivers/firmware/efi/libstub/arm32-stub.c
@@ -199,14 +199,8 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
unsigned long kernel_base;
efi_status_t status;
- /*
- * Verify that the DRAM base address is compatible with the ARM
- * boot protocol, which determines the base of DRAM by masking
- * off the low 27 bits of the address at which the zImage is
- * loaded. These assumptions are made by the decompressor,
- * before any memory map is available.
- */
- kernel_base = round_up(dram_base, SZ_128M);
+ /* use a 16 MiB aligned base for the decompressed kernel */
+ kernel_base = round_up(dram_base, SZ_16M) + TEXT_OFFSET;
/*
* Note that some platforms (notably, the Raspberry Pi 2) put
@@ -215,41 +209,14 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
* base of the kernel image is only partially used at the moment.
* (Up to 5 pages are used for the swapper page tables)
*/
- kernel_base += TEXT_OFFSET - 5 * PAGE_SIZE;
-
- status = reserve_kernel_base(kernel_base, reserve_addr, reserve_size);
+ status = reserve_kernel_base(kernel_base - 5 * PAGE_SIZE, reserve_addr,
+ reserve_size);
if (status != EFI_SUCCESS) {
efi_err("Unable to allocate memory for uncompressed kernel.\n");
return status;
}
- /*
- * Relocate the zImage, so that it appears in the lowest 128 MB
- * memory window.
- */
- *image_addr = (unsigned long)image->image_base;
- *image_size = image->image_size;
- status = efi_relocate_kernel(image_addr, *image_size, *image_size,
- kernel_base + MAX_UNCOMP_KERNEL_SIZE, 0, 0);
- if (status != EFI_SUCCESS) {
- efi_err("Failed to relocate kernel.\n");
- efi_free(*reserve_size, *reserve_addr);
- *reserve_size = 0;
- return status;
- }
-
- /*
- * Check to see if we were able to allocate memory low enough
- * in memory. The kernel determines the base of DRAM from the
- * address at which the zImage is loaded.
- */
- if (*image_addr + *image_size > dram_base + ZIMAGE_OFFSET_LIMIT) {
- efi_err("Failed to relocate kernel, no low memory available.\n");
- efi_free(*reserve_size, *reserve_addr);
- *reserve_size = 0;
- efi_free(*image_size, *image_addr);
- *image_size = 0;
- return EFI_LOAD_ERROR;
- }
+ *image_addr = kernel_base;
+ *image_size = 0;
return EFI_SUCCESS;
}