#include "linux.h"
#include "util.h"
-#define SETUP_MAGIC 0x53726448 /* "HdrS" */
-struct SetupHeader {
- UINT8 boot_sector[0x01f1];
- UINT8 setup_secs;
- UINT16 root_flags;
- UINT32 sys_size;
- UINT16 ram_size;
- UINT16 video_mode;
- UINT16 root_dev;
- UINT16 signature;
- UINT16 jump;
- UINT32 header;
- UINT16 version;
- UINT16 su_switch;
- UINT16 setup_seg;
- UINT16 start_sys;
- UINT16 kernel_ver;
- UINT8 loader_id;
- UINT8 load_flags;
- UINT16 movesize;
- UINT32 code32_start;
- UINT32 ramdisk_start;
- UINT32 ramdisk_len;
- UINT32 bootsect_kludge;
- UINT16 heap_end;
- UINT8 ext_loader_ver;
- UINT8 ext_loader_type;
- UINT32 cmd_line_ptr;
- UINT32 ramdisk_max;
- UINT32 kernel_alignment;
- UINT8 relocatable_kernel;
- UINT8 min_alignment;
- UINT16 xloadflags;
- UINT32 cmdline_size;
- UINT32 hardware_subarch;
- UINT64 hardware_subarch_data;
- UINT32 payload_offset;
- UINT32 payload_length;
- UINT64 setup_data;
- UINT64 pref_address;
- UINT32 init_size;
- UINT32 handover_offset;
-} __attribute__((packed));
-
#ifdef __x86_64__
-typedef VOID(*handover_f)(VOID *image, EFI_SYSTEM_TABLE *table, struct SetupHeader *setup);
-static VOID linux_efi_handover(EFI_HANDLE image, struct SetupHeader *setup) {
+typedef VOID(*handover_f)(VOID *image, EFI_SYSTEM_TABLE *table, struct boot_params *params);
+static VOID linux_efi_handover(EFI_HANDLE image, struct boot_params *params) {
handover_f handover;
asm volatile ("cli");
- handover = (handover_f)((UINTN)setup->code32_start + 512 + setup->handover_offset);
- handover(image, ST, setup);
+ handover = (handover_f)((UINTN)params->hdr.code32_start + 512 + params->hdr.handover_offset);
+ handover(image, ST, params);
}
#else
-typedef VOID(*handover_f)(VOID *image, EFI_SYSTEM_TABLE *table, struct SetupHeader *setup) __attribute__((regparm(0)));
-static VOID linux_efi_handover(EFI_HANDLE image, struct SetupHeader *setup) {
+typedef VOID(*handover_f)(VOID *image, EFI_SYSTEM_TABLE *table, struct boot_params *params) __attribute__((regparm(0)));
+static VOID linux_efi_handover(EFI_HANDLE image, struct boot_params *params) {
handover_f handover;
- handover = (handover_f)((UINTN)setup->code32_start + setup->handover_offset);
- handover(image, ST, setup);
+ handover = (handover_f)((UINTN)params->hdr.code32_start + params->hdr.handover_offset);
+ handover(image, ST, params);
}
#endif
EFI_STATUS linux_exec(EFI_HANDLE *image,
CHAR8 *cmdline, UINTN cmdline_len,
UINTN linux_addr,
- UINTN initrd_addr, UINTN initrd_size, BOOLEAN secure) {
- struct SetupHeader *image_setup;
- struct SetupHeader *boot_setup;
+ UINTN initrd_addr, UINTN initrd_size) {
+ struct boot_params *image_params;
+ struct boot_params *boot_params;
+ UINT8 setup_sectors;
EFI_PHYSICAL_ADDRESS addr;
EFI_STATUS err;
- image_setup = (struct SetupHeader *)(linux_addr);
- if (image_setup->signature != 0xAA55 || image_setup->header != SETUP_MAGIC)
- return EFI_LOAD_ERROR;
+ image_params = (struct boot_params *) linux_addr;
- if (image_setup->version < 0x20b || !image_setup->relocatable_kernel)
+ if (image_params->hdr.boot_flag != 0xAA55 ||
+ image_params->hdr.header != SETUP_MAGIC ||
+ image_params->hdr.version < 0x20b ||
+ !image_params->hdr.relocatable_kernel)
return EFI_LOAD_ERROR;
- addr = 0x3fffffff;
+ boot_params = (struct boot_params *) 0xFFFFFFFF;
err = uefi_call_wrapper(BS->AllocatePages, 4, AllocateMaxAddress, EfiLoaderData,
- EFI_SIZE_TO_PAGES(0x4000), &addr);
+ EFI_SIZE_TO_PAGES(0x4000), (UINTN *) &boot_params);
if (EFI_ERROR(err))
return err;
- boot_setup = (struct SetupHeader *)(UINTN)addr;
- ZeroMem(boot_setup, 0x4000);
- CopyMem(boot_setup, image_setup, sizeof(struct SetupHeader));
- boot_setup->loader_id = 0xff;
-
- if (secure) {
- /* set secure boot flag in linux kernel zero page, see
- - Documentation/x86/zero-page.txt
- - arch/x86/include/uapi/asm/bootparam.h
- - drivers/firmware/efi/libstub/secureboot.c
- in the linux kernel source tree
- Possible values: 0 (unassigned), 1 (undetected), 2 (disabled), 3 (enabled)
- */
- boot_setup->boot_sector[0x1ec] = 3;
- }
- boot_setup->code32_start = (UINT32)linux_addr + (image_setup->setup_secs+1) * 512;
+ ZeroMem(boot_params, 0x4000);
+ CopyMem(&boot_params->hdr, &image_params->hdr, sizeof(struct setup_header));
+ boot_params->hdr.type_of_loader = 0xff;
+ setup_sectors = image_params->hdr.setup_sects > 0 ? image_params->hdr.setup_sects : 4;
+ boot_params->hdr.code32_start = (UINT32)linux_addr + (setup_sectors + 1) * 512;
if (cmdline) {
addr = 0xA0000;
return err;
CopyMem((VOID *)(UINTN)addr, cmdline, cmdline_len);
((CHAR8 *)(UINTN)addr)[cmdline_len] = 0;
- boot_setup->cmd_line_ptr = (UINT32)addr;
+ boot_params->hdr.cmd_line_ptr = (UINT32)addr;
}
- boot_setup->ramdisk_start = (UINT32)initrd_addr;
- boot_setup->ramdisk_len = (UINT32)initrd_size;
+ boot_params->hdr.ramdisk_image = (UINT32)initrd_addr;
+ boot_params->hdr.ramdisk_size = (UINT32)initrd_size;
- linux_efi_handover(image, boot_setup);
+ linux_efi_handover(image, boot_params);
return EFI_LOAD_ERROR;
}