mirror of
https://github.com/brain-hackers/u-boot-brain
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![Andreas Bießmann](/assets/img/avatar_default.png)
I'll switch my mails to my own server, so drop all gmail references. Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
214 lines
4.7 KiB
C
214 lines
4.7 KiB
C
/*
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* Copyright (C) 2004-2006 Atmel Corporation
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*
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* SPDX-License-Identifier: GPL-2.0+
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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 <asm/arch/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->arch.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 struct tag *setup_boardinfo_tag(struct tag *params)
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{
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params->hdr.tag = ATAG_BOARDINFO;
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params->hdr.size = tag_size(tag_boardinfo);
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params->u.boardinfo.board_number = gd->bd->bi_board_number;
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return tag_next(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 * const 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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/*
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* allow the PREP bootm subcommand, it is required for bootm to work
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*
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* TODO: Andreas Bießmann <andreas@biessmann.org> refactor the
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* do_bootm_linux() for avr32
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*/
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if (flag & BOOTM_STATE_OS_PREP)
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return 0;
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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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bootstage_mark(BOOTSTAGE_ID_RUN_OS);
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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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params = setup_boardinfo_tag(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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