diff options
Diffstat (limited to 'grub-core/kern/uboot/hw.c')
-rw-r--r-- | grub-core/kern/uboot/hw.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/grub-core/kern/uboot/hw.c b/grub-core/kern/uboot/hw.c new file mode 100644 index 0000000..272b83b --- /dev/null +++ b/grub-core/kern/uboot/hw.c @@ -0,0 +1,112 @@ +/* hw.c - U-Boot hardware discovery */ +/* + * 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/kernel.h> +#include <grub/memory.h> +#include <grub/misc.h> +#include <grub/mm.h> +#include <grub/offsets.h> +#include <grub/machine/kernel.h> +#include <grub/uboot/disk.h> +#include <grub/uboot/uboot.h> +#include <grub/uboot/api_public.h> + +grub_addr_t start_of_ram; + +/* + * 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; + + 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; + } +} + +/* + * grub_uboot_probe_hardware(): + */ +grub_err_t +grub_uboot_probe_hardware (void) +{ + int devcount, i; + + devcount = grub_uboot_dev_enum (); + grub_dprintf ("init", "%d devices found\n", devcount); + + for (i = 0; i < devcount; i++) + { + struct device_info *devinfo = grub_uboot_dev_get (i); + + grub_dprintf ("init", "device handle: %d\n", i); + grub_dprintf ("init", " cookie\t= 0x%08x\n", + (grub_uint32_t) devinfo->cookie); + + if (devinfo->type & DEV_TYP_STOR) + { + grub_dprintf ("init", " type\t\t= DISK\n"); + grub_ubootdisk_register (devinfo); + } + else if (devinfo->type & DEV_TYP_NET) + { + /* Dealt with in ubootnet module. */ + grub_dprintf ("init", " type\t\t= NET (not supported yet)\n"); + } + else + { + grub_dprintf ("init", "%s: unknown device type", __FUNCTION__); + } + } + + return GRUB_ERR_NONE; +} + +grub_err_t +grub_machine_mmap_iterate (grub_memory_hook_t hook, void *hook_data) +{ + int i; + struct sys_info *si = grub_uboot_get_sys_info (); + + if (!si || (si->mr_no < 1)) + return GRUB_ERR_BUG; + + /* Iterate and call `hook'. */ + for (i = 0; i < si->mr_no; i++) + if ((si->mr[i].flags & MR_ATTR_MASK) == MR_ATTR_DRAM) + hook (si->mr[i].start, si->mr[i].size, GRUB_MEMORY_AVAILABLE, + hook_data); + + return GRUB_ERR_NONE; +} |