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/* 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;
}
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