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Patch by Haavard Skinnemoen, 6 Sep 2006 16:23:02 +0200 This patch adds common infrastructure code for the Atmel AVR32 architecture. See doc/README.AVR32 for details. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
316 lines
7.4 KiB
C
316 lines
7.4 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/platform.h>
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DECLARE_GLOBAL_DATA_PTR;
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extern int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
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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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#ifdef CONFIG_SHOW_BOOT_PROGRESS
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# include <status_led.h>
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# define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg)
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#else
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# define SHOW_BOOT_PROGRESS(arg)
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#endif
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extern image_header_t header; /* from cmd_bootm.c */
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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 = pm_get_clock_freq(CLOCK_HSB);
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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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void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
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unsigned long addr, unsigned long *len_ptr, int verify)
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{
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unsigned long data, len = 0;
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unsigned long initrd_start, initrd_end;
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unsigned long image_start, image_end;
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unsigned long checksum;
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void (*theKernel)(int magic, void *tagtable);
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image_header_t *hdr;
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struct tag *params, *params_start;
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char *commandline = getenv("bootargs");
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hdr = (image_header_t *)addr;
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image_start = addr;
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image_end = addr + hdr->ih_size;
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theKernel = (void *)ntohl(hdr->ih_ep);
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/*
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* Check if there is an initrd image
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*/
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if (argc >= 3) {
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SHOW_BOOT_PROGRESS(9);
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addr = simple_strtoul(argv[2], NULL, 16);
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printf("## Loading RAMDISK image at %08lx ...\n", addr);
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memcpy(&header, (char *)addr, sizeof(header));
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hdr = &header;
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if (ntohl(hdr->ih_magic) != IH_MAGIC) {
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puts("Bad Magic Number\n");
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SHOW_BOOT_PROGRESS(-10);
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do_reset(cmdtp, flag, argc, argv);
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}
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data = (unsigned long)hdr;
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len = sizeof(*hdr);
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checksum = ntohl(hdr->ih_hcrc);
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hdr->ih_hcrc = 0;
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if (crc32(0, (unsigned char *)data, len) != checksum) {
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puts("Bad Header Checksum\n");
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SHOW_BOOT_PROGRESS(-11);
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do_reset(cmdtp, flag, argc, argv);
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}
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SHOW_BOOT_PROGRESS(10);
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print_image_hdr(hdr);
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data = addr + sizeof(header);
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len = ntohl(hdr->ih_size);
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if (verify) {
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unsigned long csum = 0;
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puts(" Verifying Checksum ... ");
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csum = crc32(0, (unsigned char *)data, len);
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if (csum != ntohl(hdr->ih_dcrc)) {
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puts("Bad Data CRC\n");
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SHOW_BOOT_PROGRESS(-12);
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do_reset(cmdtp, flag, argc, argv);
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}
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puts("OK\n");
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}
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SHOW_BOOT_PROGRESS(11);
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if ((hdr->ih_os != IH_OS_LINUX) ||
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(hdr->ih_arch != IH_CPU_AVR32) ||
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(hdr->ih_type != IH_TYPE_RAMDISK)) {
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puts("Not a Linux/AVR32 RAMDISK image\n");
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SHOW_BOOT_PROGRESS(-13);
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do_reset(cmdtp, flag, argc, argv);
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}
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} else if ((hdr->ih_type == IH_TYPE_MULTI) && (len_ptr[1])) {
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ulong tail = ntohl (len_ptr[0]) % 4;
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int i;
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SHOW_BOOT_PROGRESS (13);
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/* skip kernel length and terminator */
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data = (ulong) (&len_ptr[2]);
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/* skip any additional image length fields */
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for (i = 1; len_ptr[i]; ++i)
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data += 4;
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/* add kernel length, and align */
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data += ntohl (len_ptr[0]);
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if (tail) {
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data += 4 - tail;
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}
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len = ntohl (len_ptr[1]);
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} else {
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/* no initrd image */
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SHOW_BOOT_PROGRESS(14);
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len = data = 0;
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}
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if (data) {
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initrd_start = data;
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initrd_end = initrd_start + len;
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} else {
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initrd_start = 0;
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initrd_end = 0;
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}
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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 (initrd_start) {
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params = setup_ramdisk_tag(params,
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PHYSADDR(initrd_start),
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PHYSADDR(initrd_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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}
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