/*
* grub_uboot_probe_memory():
* Queries U-Boot for available memory regions.
*
* Sets up heap near the image in memory and sets up "start_of_ram".
*/
void
grub_uboot_mm_init (void)
{
struct sys_info *si = grub_uboot_get_sys_info ();
grub_mm_init_region ((void *) grub_modules_get_end (),
GRUB_KERNEL_MACHINE_HEAP_SIZE);
if (si && (si->mr_no != 0))
{
int i;
start_of_ram = GRUB_UINT_MAX;
// first, search for the start address
for (i = 0; i < si->mr_no; i++)
if ((si->mr[i].flags & MR_ATTR_MASK) == MR_ATTR_DRAM)
if (si->mr[i].start < start_of_ram)
start_of_ram = si->mr[i].start;
// then init memory regions for the others
for (i = 0; i < si->mr_no; i++)
if ((si->mr[i].flags & MR_ATTR_MASK) == MR_ATTR_DRAM)
if (si->mr[i].start != start_of_ram)
grub_mm_init_region ((void *) si->mr[i].start, si->mr[i].size);
}
}
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 ();
}
static void
grub_heap_init (void)
{
grub_mm_init_region ((void *) (grub_modules_get_end ()
+ GRUB_KERNEL_MACHINE_STACK_SIZE), 0x200000);
}