113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
/* hw.c - U-Boot hardware discovery */
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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/kernel.h>
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#include <grub/memory.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/machine/kernel.h>
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#include <grub/uboot/disk.h>
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#include <grub/uboot/uboot.h>
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grub_addr_t start_of_ram;
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/*
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* grub_uboot_probe_memory():
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* Queries U-Boot for available memory regions.
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*
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* Sets up heap near the image in memory and sets up "start_of_ram".
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*/
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void
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grub_uboot_mm_init (void)
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{
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struct sys_info *si = uboot_get_sys_info ();
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grub_mm_init_region ((void *) (grub_modules_get_end ()
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+ GRUB_KERNEL_MACHINE_STACK_SIZE),
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GRUB_KERNEL_MACHINE_HEAP_SIZE);
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if (si && (si->mr_no != 0))
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{
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int i;
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start_of_ram = GRUB_UINT_MAX;
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for (i = 0; i < si->mr_no; i++)
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if ((si->mr[i].flags & MR_ATTR_MASK) == MR_ATTR_DRAM)
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if (si->mr[i].start < start_of_ram)
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start_of_ram = si->mr[i].start;
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}
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}
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/*
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* grub_uboot_probe_hardware():
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*
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*/
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grub_err_t
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grub_uboot_probe_hardware (void)
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{
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int devcount, i;
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devcount = uboot_dev_enum ();
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grub_dprintf ("init", "%d devices found\n", devcount);
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for (i = 0; i < devcount; i++)
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{
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struct device_info *devinfo = uboot_dev_get (i);
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grub_dprintf ("init", "device handle: %d\n", i);
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grub_dprintf ("init", " cookie\t= 0x%08x\n",
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(grub_uint32_t) devinfo->cookie);
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if (devinfo->type & DEV_TYP_STOR)
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{
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grub_dprintf ("init", " type\t\t= DISK\n");
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grub_ubootdisk_register (devinfo, i);
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}
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else if (devinfo->type & DEV_TYP_NET)
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{
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grub_dprintf ("init", " type\t\t= NET (not supported yet)\n");
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}
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else
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{
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grub_dprintf ("init", "%s: unknown device type", __FUNCTION__);
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}
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}
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return GRUB_ERR_NONE;
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}
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grub_err_t
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grub_machine_mmap_iterate (grub_memory_hook_t hook, void *hook_data)
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{
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int i;
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struct sys_info *si = uboot_get_sys_info ();
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if (!si || (si->mr_no < 1))
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return GRUB_ERR_BUG;
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/* Iterate and call `hook'. */
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for (i = 0; i < si->mr_no; i++)
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if ((si->mr[i].flags & MR_ATTR_MASK) == MR_ATTR_DRAM)
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hook (si->mr[i].start, si->mr[i].size, GRUB_MEMORY_AVAILABLE,
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hook_data);
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return GRUB_ERR_NONE;
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}
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