157 lines
3.7 KiB
C
157 lines
3.7 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) 2013 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/env.h>
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#include <grub/kernel.h>
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#include <grub/misc.h>
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#include <grub/mm.h>
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#include <grub/offsets.h>
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#include <grub/term.h>
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#include <grub/time.h>
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#include <grub/machine/kernel.h>
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#include <grub/uboot/console.h>
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#include <grub/uboot/disk.h>
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#include <grub/uboot/uboot.h>
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#include <grub/uboot/api_public.h>
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extern char __bss_start[];
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extern char _end[];
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extern grub_size_t grub_total_module_size;
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extern int (*grub_uboot_syscall_ptr) (int, int *, ...);
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/* Set to anything other than zero so it lands in .data and not .bss. */
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grub_addr_t grub_modbase = 0x55aa55aa;
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grub_uint32_t grub_uboot_machine_type = 0x55aa55aa;
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grub_addr_t grub_uboot_boot_data = 0x55aa55aa;
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static unsigned long timer_start;
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void
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grub_exit (void)
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{
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grub_uboot_return (0);
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}
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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_uboot_machine_type;
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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_uboot_boot_data;
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}
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static grub_uint64_t
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uboot_timer_ms (void)
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{
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return (grub_uint64_t) grub_uboot_get_timer (timer_start) / 1000;
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}
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void
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grub_machine_init (void)
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{
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int ver;
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/* First of all - establish connection with U-Boot */
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ver = grub_uboot_api_init ();
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if (!ver)
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{
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/* Don't even have a console to log errors to... */
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grub_exit ();
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}
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else if (ver > API_SIG_VERSION)
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{
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/* Try to print an error message */
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grub_uboot_puts ("invalid U-Boot API version\n");
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}
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/* Initialize the console so that GRUB can display messages. */
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grub_console_init_early ();
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/* Enumerate memory and initialize the memory management system. */
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grub_uboot_mm_init ();
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grub_dprintf ("init", "__bss_start: %p\n", __bss_start);
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grub_dprintf ("init", "_end: %p\n", _end);
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grub_dprintf ("init", "grub_modbase: %p\n", (void *) grub_modbase);
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grub_dprintf ("init", "grub_modules_get_end(): %p\n",
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(void *) grub_modules_get_end ());
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/* Initialise full terminfo support */
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grub_console_init_lately ();
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/* Enumerate uboot devices */
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grub_uboot_probe_hardware ();
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/* Initialise timer */
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timer_start = grub_uboot_get_timer (0);
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grub_install_get_time_ms (uboot_timer_ms);
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/* Initialize */
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grub_ubootdisk_init ();
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}
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void
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grub_machine_fini (int flags __attribute__ ((unused)))
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{
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}
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/*
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* grub_machine_get_bootlocation():
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* Called from kern/main.c, which expects a device name (minus parentheses)
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* and a filesystem path back, if any are known.
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* Any returned values must be pointers to dynamically allocated strings.
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*/
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void
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grub_machine_get_bootlocation (char **device, char **path)
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{
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char *tmp;
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tmp = grub_uboot_env_get ("grub_bootdev");
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if (tmp)
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{
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*device = grub_strdup (tmp);
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if (*device == NULL)
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return;
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}
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else
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*device = NULL;
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tmp = grub_uboot_env_get ("grub_bootpath");
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if (tmp)
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{
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*path = grub_strdup (tmp);
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if (*path == NULL)
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return;
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}
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else
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*path = NULL;
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}
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void
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grub_uboot_fini (void)
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{
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grub_ubootdisk_fini ();
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grub_console_fini ();
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}
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