| /* init.c - generic U-Boot initialization and finalization */ |
| /* |
| * GRUB -- GRand Unified Bootloader |
| * Copyright (C) 2016 Free Software Foundation, Inc. |
| * |
| * GRUB is free software: you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation, either version 3 of the License, or |
| * (at your option) any later version. |
| * |
| * GRUB is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with GRUB. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <grub/uboot/uboot.h> |
| #include <grub/arm/startup.h> |
| #include <grub/uboot/api_public.h> |
| |
| extern int (*grub_uboot_syscall_ptr) (int, int *, ...); |
| |
| grub_uint32_t |
| grub_uboot_get_machine_type (void) |
| { |
| return grub_arm_saved_registers.r[1]; |
| } |
| |
| grub_addr_t |
| grub_uboot_get_boot_data (void) |
| { |
| return grub_arm_saved_registers.r[2]; |
| } |
| |
| int |
| grub_uboot_api_init (void) |
| { |
| struct api_signature *start, *end; |
| struct api_signature *p; |
| grub_addr_t grub_uboot_search_hint = grub_arm_saved_registers.sp; |
| if (grub_uboot_search_hint) |
| { |
| /* Extended search range to work around Trim Slice U-Boot issue */ |
| start = (struct api_signature *) ((grub_uboot_search_hint & ~0x000fffff) |
| - 0x00500000); |
| end = |
| (struct api_signature *) ((grub_addr_t) start + UBOOT_API_SEARCH_LEN - |
| API_SIG_MAGLEN + 0x00500000); |
| } |
| else |
| { |
| start = 0; |
| end = (struct api_signature *) (256 * 1024 * 1024); |
| } |
| |
| /* Structure alignment is (at least) 8 bytes */ |
| for (p = start; p < end; p = (void *) ((grub_addr_t) p + 8)) |
| { |
| if (grub_memcmp (&(p->magic), API_SIG_MAGIC, API_SIG_MAGLEN) == 0) |
| { |
| grub_uboot_syscall_ptr = p->syscall; |
| return p->version; |
| } |
| } |
| |
| return 0; |
| } |