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