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https://github.com/brain-hackers/u-boot-brain
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![Jean-Christophe PLAGNIOL-VILLARD](/assets/img/avatar_default.png)
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
210 lines
4.9 KiB
C
210 lines
4.9 KiB
C
/*
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* Copyright (C) 2004-2006 Atmel Corporation
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (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,
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* MA 02111-1307 USA
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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 <zlib.h>
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#include <asm/byteorder.h>
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#include <asm/addrspace.h>
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#include <asm/io.h>
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#include <asm/setup.h>
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#include <asm/arch/clk.h>
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DECLARE_GLOBAL_DATA_PTR;
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/* CPU-specific hook to allow flushing of caches, etc. */
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extern void prepare_to_boot(void);
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static struct tag *setup_start_tag(struct tag *params)
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{
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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 = 4096;
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params->u.core.rootdev = 0;
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return tag_next(params);
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}
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static struct tag *setup_memory_tags(struct tag *params)
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{
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bd_t *bd = gd->bd;
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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_mem_range);
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params->u.mem_range.addr = bd->bi_dram[i].start;
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params->u.mem_range.size = bd->bi_dram[i].size;
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params = tag_next(params);
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}
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return params;
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}
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static struct tag *setup_commandline_tag(struct tag *params, char *cmdline)
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{
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if (!cmdline)
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return params;
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/* eat leading white space */
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while (*cmdline == ' ') cmdline++;
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/*
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* Don't include tags for empty command lines; let the kernel
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* use its default command line.
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*/
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if (*cmdline == '\0')
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return params;
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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(cmdline) + 1 + 3) >> 2;
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strcpy(params->u.cmdline.cmdline, cmdline);
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return tag_next(params);
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}
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static struct tag *setup_ramdisk_tag(struct tag *params,
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unsigned long rd_start,
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unsigned long rd_end)
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{
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if (rd_start == rd_end)
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return params;
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params->hdr.tag = ATAG_RDIMG;
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params->hdr.size = tag_size(tag_mem_range);
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params->u.mem_range.addr = rd_start;
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params->u.mem_range.size = rd_end - rd_start;
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return tag_next(params);
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}
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static struct tag *setup_clock_tags(struct tag *params)
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{
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params->hdr.tag = ATAG_CLOCK;
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params->hdr.size = tag_size(tag_clock);
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params->u.clock.clock_id = ACLOCK_BOOTCPU;
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params->u.clock.clock_flags = 0;
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params->u.clock.clock_hz = gd->cpu_hz;
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#ifdef CONFIG_AT32AP7000
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/*
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* New kernels don't need this, but we should be backwards
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* compatible for a while...
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*/
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params = tag_next(params);
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params->hdr.tag = ATAG_CLOCK;
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params->hdr.size = tag_size(tag_clock);
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params->u.clock.clock_id = ACLOCK_HSB;
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params->u.clock.clock_flags = 0;
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params->u.clock.clock_hz = get_hsb_clk_rate();
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#endif
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return tag_next(params);
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}
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static struct tag *setup_ethernet_tag(struct tag *params,
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char *addr, int index)
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{
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char *s, *e;
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int i;
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params->hdr.tag = ATAG_ETHERNET;
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params->hdr.size = tag_size(tag_ethernet);
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params->u.ethernet.mac_index = index;
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params->u.ethernet.mii_phy_addr = gd->bd->bi_phy_id[index];
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s = addr;
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for (i = 0; i < 6; i++) {
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params->u.ethernet.hw_address[i] = simple_strtoul(s, &e, 16);
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s = e + 1;
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}
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return tag_next(params);
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}
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static struct tag *setup_ethernet_tags(struct tag *params)
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{
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char name[16] = "ethaddr";
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char *addr;
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int i = 0;
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do {
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addr = getenv(name);
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if (addr)
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params = setup_ethernet_tag(params, addr, i);
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sprintf(name, "eth%daddr", ++i);
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} while (i < 4);
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return params;
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}
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static void setup_end_tag(struct tag *params)
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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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int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
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{
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void (*theKernel)(int magic, void *tagtable);
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struct tag *params, *params_start;
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char *commandline = getenv("bootargs");
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if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
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return 1;
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theKernel = (void *)images->ep;
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show_boot_progress (15);
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params = params_start = (struct tag *)gd->bd->bi_boot_params;
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params = setup_start_tag(params);
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params = setup_memory_tags(params);
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if (images->rd_start) {
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params = setup_ramdisk_tag(params,
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PHYSADDR(images->rd_start),
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PHYSADDR(images->rd_end));
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}
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params = setup_commandline_tag(params, commandline);
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params = setup_clock_tags(params);
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params = setup_ethernet_tags(params);
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setup_end_tag(params);
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printf("\nStarting kernel at %p (params at %p)...\n\n",
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theKernel, params_start);
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prepare_to_boot();
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theKernel(ATAG_MAGIC, params_start);
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/* does not return */
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return 1;
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}
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