diff options
Diffstat (limited to 'arch/avr32/lib/bootm.c')
| -rw-r--r-- | arch/avr32/lib/bootm.c | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/arch/avr32/lib/bootm.c b/arch/avr32/lib/bootm.c new file mode 100644 index 0000000000..6a3172a9a0 --- /dev/null +++ b/arch/avr32/lib/bootm.c @@ -0,0 +1,209 @@ +/* + * Copyright (C) 2004-2006 Atmel Corporation + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program 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 2 of + * the License, or (at your option) any later version. + * + * This program 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 this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ +#include <common.h> +#include <command.h> +#include <image.h> +#include <u-boot/zlib.h> +#include <asm/byteorder.h> +#include <asm/arch/addrspace.h> +#include <asm/io.h> +#include <asm/setup.h> +#include <asm/arch/clk.h> + +DECLARE_GLOBAL_DATA_PTR; + +/* CPU-specific hook to allow flushing of caches, etc. */ +extern void prepare_to_boot(void); + +static struct tag *setup_start_tag(struct tag *params) +{ + params->hdr.tag = ATAG_CORE; + params->hdr.size = tag_size(tag_core); + + params->u.core.flags = 0; + params->u.core.pagesize = 4096; + params->u.core.rootdev = 0; + + return tag_next(params); +} + +static struct tag *setup_memory_tags(struct tag *params) +{ + bd_t *bd = gd->bd; + int i; + + for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) { + params->hdr.tag = ATAG_MEM; + params->hdr.size = tag_size(tag_mem_range); + + params->u.mem_range.addr = bd->bi_dram[i].start; + params->u.mem_range.size = bd->bi_dram[i].size; + + params = tag_next(params); + } + + return params; +} + +static struct tag *setup_commandline_tag(struct tag *params, char *cmdline) +{ + if (!cmdline) + return params; + + /* eat leading white space */ + while (*cmdline == ' ') cmdline++; + + /* + * Don't include tags for empty command lines; let the kernel + * use its default command line. + */ + if (*cmdline == '\0') + return params; + + params->hdr.tag = ATAG_CMDLINE; + params->hdr.size = + (sizeof (struct tag_header) + strlen(cmdline) + 1 + 3) >> 2; + strcpy(params->u.cmdline.cmdline, cmdline); + + return tag_next(params); +} + +static struct tag *setup_ramdisk_tag(struct tag *params, + unsigned long rd_start, + unsigned long rd_end) +{ + if (rd_start == rd_end) + return params; + + params->hdr.tag = ATAG_RDIMG; + params->hdr.size = tag_size(tag_mem_range); + + params->u.mem_range.addr = rd_start; + params->u.mem_range.size = rd_end - rd_start; + + return tag_next(params); +} + +static struct tag *setup_clock_tags(struct tag *params) +{ + params->hdr.tag = ATAG_CLOCK; + params->hdr.size = tag_size(tag_clock); + params->u.clock.clock_id = ACLOCK_BOOTCPU; + params->u.clock.clock_flags = 0; + params->u.clock.clock_hz = gd->cpu_hz; + +#ifdef CONFIG_AT32AP7000 + /* + * New kernels don't need this, but we should be backwards + * compatible for a while... + */ + params = tag_next(params); + + params->hdr.tag = ATAG_CLOCK; + params->hdr.size = tag_size(tag_clock); + params->u.clock.clock_id = ACLOCK_HSB; + params->u.clock.clock_flags = 0; + params->u.clock.clock_hz = get_hsb_clk_rate(); +#endif + + return tag_next(params); +} + +static struct tag *setup_ethernet_tag(struct tag *params, + char *addr, int index) +{ + char *s, *e; + int i; + + params->hdr.tag = ATAG_ETHERNET; + params->hdr.size = tag_size(tag_ethernet); + + params->u.ethernet.mac_index = index; + params->u.ethernet.mii_phy_addr = gd->bd->bi_phy_id[index]; + + s = addr; + for (i = 0; i < 6; i++) { + params->u.ethernet.hw_address[i] = simple_strtoul(s, &e, 16); + s = e + 1; + } + + return tag_next(params); +} + +static struct tag *setup_ethernet_tags(struct tag *params) +{ + char name[16] = "ethaddr"; + char *addr; + int i = 0; + + do { + addr = getenv(name); + if (addr) + params = setup_ethernet_tag(params, addr, i); + sprintf(name, "eth%daddr", ++i); + } while (i < 4); + + return params; +} + +static void setup_end_tag(struct tag *params) +{ + params->hdr.tag = ATAG_NONE; + params->hdr.size = 0; +} + +int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images) +{ + void (*theKernel)(int magic, void *tagtable); + struct tag *params, *params_start; + char *commandline = getenv("bootargs"); + + if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) + return 1; + + theKernel = (void *)images->ep; + + show_boot_progress (15); + + params = params_start = (struct tag *)gd->bd->bi_boot_params; + params = setup_start_tag(params); + params = setup_memory_tags(params); + if (images->rd_start) { + params = setup_ramdisk_tag(params, + PHYSADDR(images->rd_start), + PHYSADDR(images->rd_end)); + } + params = setup_commandline_tag(params, commandline); + params = setup_clock_tags(params); + params = setup_ethernet_tags(params); + setup_end_tag(params); + + printf("\nStarting kernel at %p (params at %p)...\n\n", + theKernel, params_start); + + prepare_to_boot(); + + theKernel(ATAG_MAGIC, params_start); + /* does not return */ + + return 1; +} |