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https://github.com/AsahiLinux/u-boot
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89e6f13849
Board can implement function setup_board_tags which is used for adding atags Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
411 lines
9.5 KiB
C
411 lines
9.5 KiB
C
/* Copyright (C) 2011
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* Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.de>
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* - Added prep subcommand support
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* - Reorganized source - modeled after powerpc version
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
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*
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* This program 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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 this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <common.h>
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#include <command.h>
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#include <image.h>
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#include <u-boot/zlib.h>
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#include <asm/byteorder.h>
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#include <fdt.h>
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#include <libfdt.h>
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#include <fdt_support.h>
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#include <asm/bootm.h>
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#include <linux/compiler.h>
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DECLARE_GLOBAL_DATA_PTR;
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#if defined(CONFIG_SETUP_MEMORY_TAGS) || \
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defined(CONFIG_CMDLINE_TAG) || \
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defined(CONFIG_INITRD_TAG) || \
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defined(CONFIG_SERIAL_TAG) || \
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defined(CONFIG_REVISION_TAG)
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static struct tag *params;
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#endif
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static ulong get_sp(void)
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{
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ulong ret;
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asm("mov %0, sp" : "=r"(ret) : );
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return ret;
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}
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void arch_lmb_reserve(struct lmb *lmb)
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{
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ulong sp;
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/*
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* Booting a (Linux) kernel image
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*
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* Allocate space for command line and board info - the
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* address should be as high as possible within the reach of
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* the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
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* memory, which means far enough below the current stack
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* pointer.
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*/
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sp = get_sp();
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debug("## Current stack ends at 0x%08lx ", sp);
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/* adjust sp by 4K to be safe */
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sp -= 4096;
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lmb_reserve(lmb, sp,
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gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size - sp);
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}
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#ifdef CONFIG_OF_LIBFDT
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static int fixup_memory_node(void *blob)
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{
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bd_t *bd = gd->bd;
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int bank;
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u64 start[CONFIG_NR_DRAM_BANKS];
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u64 size[CONFIG_NR_DRAM_BANKS];
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for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
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start[bank] = bd->bi_dram[bank].start;
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size[bank] = bd->bi_dram[bank].size;
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}
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return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
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}
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#endif
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static void announce_and_cleanup(void)
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{
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printf("\nStarting kernel ...\n\n");
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bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
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#ifdef CONFIG_BOOTSTAGE_FDT
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bootstage_fdt_add_report();
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#endif
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#ifdef CONFIG_BOOTSTAGE_REPORT
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bootstage_report();
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#endif
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#ifdef CONFIG_USB_DEVICE
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udc_disconnect();
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#endif
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cleanup_before_linux();
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}
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#if defined(CONFIG_SETUP_MEMORY_TAGS) || \
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defined(CONFIG_CMDLINE_TAG) || \
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defined(CONFIG_INITRD_TAG) || \
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defined(CONFIG_SERIAL_TAG) || \
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defined(CONFIG_REVISION_TAG)
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static void setup_start_tag (bd_t *bd)
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{
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params = (struct tag *)bd->bi_boot_params;
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params->hdr.tag = ATAG_CORE;
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params->hdr.size = tag_size (tag_core);
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params->u.core.flags = 0;
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params->u.core.pagesize = 0;
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params->u.core.rootdev = 0;
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params = tag_next (params);
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}
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#endif
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#ifdef CONFIG_SETUP_MEMORY_TAGS
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static void setup_memory_tags(bd_t *bd)
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{
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int i;
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for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
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params->hdr.tag = ATAG_MEM;
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params->hdr.size = tag_size (tag_mem32);
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params->u.mem.start = bd->bi_dram[i].start;
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params->u.mem.size = bd->bi_dram[i].size;
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params = tag_next (params);
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}
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}
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#endif
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#ifdef CONFIG_CMDLINE_TAG
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static void setup_commandline_tag(bd_t *bd, char *commandline)
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{
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char *p;
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if (!commandline)
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return;
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/* eat leading white space */
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for (p = commandline; *p == ' '; p++);
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/* skip non-existent command lines so the kernel will still
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* use its default command line.
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*/
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if (*p == '\0')
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return;
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params->hdr.tag = ATAG_CMDLINE;
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params->hdr.size =
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(sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
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strcpy (params->u.cmdline.cmdline, p);
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params = tag_next (params);
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}
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#endif
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#ifdef CONFIG_INITRD_TAG
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static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
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{
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/* an ATAG_INITRD node tells the kernel where the compressed
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* ramdisk can be found. ATAG_RDIMG is a better name, actually.
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*/
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params->hdr.tag = ATAG_INITRD2;
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params->hdr.size = tag_size (tag_initrd);
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params->u.initrd.start = initrd_start;
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params->u.initrd.size = initrd_end - initrd_start;
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params = tag_next (params);
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}
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#endif
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#ifdef CONFIG_SERIAL_TAG
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void setup_serial_tag(struct tag **tmp)
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{
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struct tag *params = *tmp;
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struct tag_serialnr serialnr;
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void get_board_serial(struct tag_serialnr *serialnr);
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get_board_serial(&serialnr);
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params->hdr.tag = ATAG_SERIAL;
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params->hdr.size = tag_size (tag_serialnr);
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params->u.serialnr.low = serialnr.low;
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params->u.serialnr.high= serialnr.high;
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params = tag_next (params);
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*tmp = params;
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}
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#endif
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#ifdef CONFIG_REVISION_TAG
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void setup_revision_tag(struct tag **in_params)
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{
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u32 rev = 0;
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u32 get_board_rev(void);
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rev = get_board_rev();
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params->hdr.tag = ATAG_REVISION;
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params->hdr.size = tag_size (tag_revision);
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params->u.revision.rev = rev;
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params = tag_next (params);
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}
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#endif
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#if defined(CONFIG_SETUP_MEMORY_TAGS) || \
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defined(CONFIG_CMDLINE_TAG) || \
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defined(CONFIG_INITRD_TAG) || \
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defined(CONFIG_SERIAL_TAG) || \
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defined(CONFIG_REVISION_TAG)
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static void setup_end_tag(bd_t *bd)
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{
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params->hdr.tag = ATAG_NONE;
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params->hdr.size = 0;
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}
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#endif
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#ifdef CONFIG_OF_LIBFDT
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static int create_fdt(bootm_headers_t *images)
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{
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ulong of_size = images->ft_len;
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char **of_flat_tree = &images->ft_addr;
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ulong *initrd_start = &images->initrd_start;
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ulong *initrd_end = &images->initrd_end;
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struct lmb *lmb = &images->lmb;
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ulong rd_len;
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int ret;
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debug("using: FDT\n");
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boot_fdt_add_mem_rsv_regions(lmb, *of_flat_tree);
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rd_len = images->rd_end - images->rd_start;
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ret = boot_ramdisk_high(lmb, images->rd_start, rd_len,
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initrd_start, initrd_end);
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if (ret)
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return ret;
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ret = boot_relocate_fdt(lmb, of_flat_tree, &of_size);
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if (ret)
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return ret;
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fdt_chosen(*of_flat_tree, 1);
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fixup_memory_node(*of_flat_tree);
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fdt_fixup_ethernet(*of_flat_tree);
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fdt_initrd(*of_flat_tree, *initrd_start, *initrd_end, 1);
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#ifdef CONFIG_OF_BOARD_SETUP
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ft_board_setup(*of_flat_tree, gd->bd);
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#endif
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return 0;
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}
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#endif
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__weak void setup_board_tags(struct tag **in_params) {}
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/* Subcommand: PREP */
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static void boot_prep_linux(bootm_headers_t *images)
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{
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#ifdef CONFIG_CMDLINE_TAG
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char *commandline = getenv("bootargs");
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#endif
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#ifdef CONFIG_OF_LIBFDT
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if (images->ft_len) {
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debug("using: FDT\n");
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if (create_fdt(images)) {
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printf("FDT creation failed! hanging...");
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hang();
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}
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} else
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#endif
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{
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#if defined(CONFIG_SETUP_MEMORY_TAGS) || \
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defined(CONFIG_CMDLINE_TAG) || \
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defined(CONFIG_INITRD_TAG) || \
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defined(CONFIG_SERIAL_TAG) || \
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defined(CONFIG_REVISION_TAG)
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debug("using: ATAGS\n");
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setup_start_tag(gd->bd);
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#ifdef CONFIG_SERIAL_TAG
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setup_serial_tag(¶ms);
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#endif
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#ifdef CONFIG_CMDLINE_TAG
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setup_commandline_tag(gd->bd, commandline);
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#endif
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#ifdef CONFIG_REVISION_TAG
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setup_revision_tag(¶ms);
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#endif
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#ifdef CONFIG_SETUP_MEMORY_TAGS
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setup_memory_tags(gd->bd);
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#endif
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#ifdef CONFIG_INITRD_TAG
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if (images->rd_start && images->rd_end)
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setup_initrd_tag(gd->bd, images->rd_start,
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images->rd_end);
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#endif
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setup_board_tags(¶ms);
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setup_end_tag(gd->bd);
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#else /* all tags */
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printf("FDT and ATAGS support not compiled in - hanging\n");
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hang();
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#endif /* all tags */
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}
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}
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/* Subcommand: GO */
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static void boot_jump_linux(bootm_headers_t *images)
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{
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unsigned long machid = gd->bd->bi_arch_number;
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char *s;
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void (*kernel_entry)(int zero, int arch, uint params);
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unsigned long r2;
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kernel_entry = (void (*)(int, int, uint))images->ep;
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s = getenv("machid");
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if (s) {
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strict_strtoul(s, 16, &machid);
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printf("Using machid 0x%lx from environment\n", machid);
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}
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debug("## Transferring control to Linux (at address %08lx)" \
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"...\n", (ulong) kernel_entry);
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bootstage_mark(BOOTSTAGE_ID_RUN_OS);
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announce_and_cleanup();
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#ifdef CONFIG_OF_LIBFDT
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if (images->ft_len)
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r2 = (unsigned long)images->ft_addr;
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else
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#endif
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r2 = gd->bd->bi_boot_params;
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kernel_entry(0, machid, r2);
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}
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/* Main Entry point for arm bootm implementation
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*
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* Modeled after the powerpc implementation
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* DIFFERENCE: Instead of calling prep and go at the end
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* they are called if subcommand is equal 0.
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*/
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int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
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{
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/* No need for those on ARM */
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if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
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return -1;
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if (flag & BOOTM_STATE_OS_PREP) {
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boot_prep_linux(images);
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return 0;
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}
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if (flag & BOOTM_STATE_OS_GO) {
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boot_jump_linux(images);
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return 0;
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}
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boot_prep_linux(images);
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boot_jump_linux(images);
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return 0;
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}
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#ifdef CONFIG_CMD_BOOTZ
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struct zimage_header {
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uint32_t code[9];
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uint32_t zi_magic;
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uint32_t zi_start;
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uint32_t zi_end;
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};
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#define LINUX_ARM_ZIMAGE_MAGIC 0x016f2818
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int bootz_setup(void *image, void **start, void **end)
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{
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struct zimage_header *zi = (struct zimage_header *)image;
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if (zi->zi_magic != LINUX_ARM_ZIMAGE_MAGIC) {
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puts("Bad Linux ARM zImage magic!\n");
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return 1;
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}
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*start = (void *)zi->zi_start;
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*end = (void *)zi->zi_end;
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debug("Kernel image @ 0x%08x [ 0x%08x - 0x%08x ]\n",
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(uint32_t)image, (uint32_t)*start, (uint32_t)*end);
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return 0;
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}
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#endif /* CONFIG_CMD_BOOTZ */
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