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/* init.c - generic U-Boot initialization and finalization */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2013 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/env.h>
#include <grub/kernel.h>
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/offsets.h>
#include <grub/term.h>
#include <grub/time.h>
#include <grub/machine/kernel.h>
#include <grub/uboot/console.h>
#include <grub/uboot/disk.h>
#include <grub/uboot/uboot.h>
#include <grub/uboot/api_public.h>
#include <grub/cpu/system.h>
#include <grub/cache.h>
extern char __bss_start[];
extern char _end[];
extern grub_size_t grub_total_module_size;
extern int (*grub_uboot_syscall_ptr) (int, int *, ...);
static unsigned long timer_start;
extern grub_uint32_t grub_uboot_machine_type;
extern grub_addr_t grub_uboot_boot_data;
void
grub_exit (void)
{
grub_uboot_return (0);
}
grub_uint32_t
grub_uboot_get_machine_type (void)
{
return grub_uboot_machine_type;
}
grub_addr_t
grub_uboot_get_boot_data (void)
{
return grub_uboot_boot_data;
}
static grub_uint64_t
uboot_timer_ms (void)
{
static grub_uint32_t last = 0, high = 0;
grub_uint32_t cur = grub_uboot_get_timer (timer_start);
if (cur < last)
high++;
last = cur;
return (((grub_uint64_t) high) << 32) | cur;
}
#ifdef __arm__
static grub_uint64_t
rpi_timer_ms (void)
{
static grub_uint32_t last = 0, high = 0;
grub_uint32_t cur = *(volatile grub_uint32_t *) 0x20003004;
if (cur < last)
high++;
last = cur;
return grub_divmod64 ((((grub_uint64_t) high) << 32) | cur, 1000, 0);
}
#endif
void
grub_machine_init (void)
{
int ver;
/* First of all - establish connection with U-Boot */
ver = grub_uboot_api_init ();
if (!ver)
{
/* Don't even have a console to log errors to... */
grub_exit ();
}
else if (ver > API_SIG_VERSION)
{
/* Try to print an error message */
grub_uboot_puts ("invalid U-Boot API version\n");
}
/* Initialize the console so that GRUB can display messages. */
grub_console_init_early ();
/* Enumerate memory and initialize the memory management system. */
grub_uboot_mm_init ();
/* Should be earlier but it needs memalign. */
#ifdef __arm__
grub_arm_enable_caches_mmu ();
#endif
grub_dprintf ("init", "__bss_start: %p\n", __bss_start);
grub_dprintf ("init", "_end: %p\n", _end);
grub_dprintf ("init", "grub_modbase: %p\n", (void *) grub_modbase);
grub_dprintf ("init", "grub_modules_get_end(): %p\n",
(void *) grub_modules_get_end ());
/* Initialise full terminfo support */
grub_console_init_lately ();
/* Enumerate uboot devices */
grub_uboot_probe_hardware ();
/* Initialise timer */
#ifdef __arm__
if (grub_uboot_get_machine_type () == GRUB_ARM_MACHINE_TYPE_RASPBERRY_PI)
{
grub_install_get_time_ms (rpi_timer_ms);
}
else
#endif
{
timer_start = grub_uboot_get_timer (0);
grub_install_get_time_ms (uboot_timer_ms);
}
/* Initialize */
grub_ubootdisk_init ();
}
void
grub_machine_fini (int flags __attribute__ ((unused)))
{
}
/*
* grub_machine_get_bootlocation():
* Called from kern/main.c, which expects a device name (minus parentheses)
* and a filesystem path back, if any are known.
* Any returned values must be pointers to dynamically allocated strings.
*/
void
grub_machine_get_bootlocation (char **device, char **path)
{
char *tmp;
tmp = grub_uboot_env_get ("grub_bootdev");
if (tmp)
{
*device = grub_strdup (tmp);
if (*device == NULL)
return;
}
else
*device = NULL;
tmp = grub_uboot_env_get ("grub_bootpath");
if (tmp)
{
*path = grub_strdup (tmp);
if (*path == NULL)
return;
}
else
*path = NULL;
}
void
grub_uboot_fini (void)
{
grub_ubootdisk_fini ();
grub_console_fini ();
}
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