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lib_avr32/avr32_linux.c
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/* * 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 <zlib.h> #include <asm/byteorder.h> #include <asm/addrspace.h> #include <asm/io.h> #include <asm/setup.h> |
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#include <asm/arch/clk.h> |
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DECLARE_GLOBAL_DATA_PTR; extern int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); /* CPU-specific hook to allow flushing of caches, etc. */ extern void prepare_to_boot(void); |
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extern image_header_t header; /* from cmd_bootm.c */ 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; |
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params->u.clock.clock_hz = get_hsb_clk_rate(); |
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#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; } void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[], unsigned long addr, unsigned long *len_ptr, int verify) { unsigned long data, len = 0; unsigned long initrd_start, initrd_end; unsigned long image_start, image_end; unsigned long checksum; void (*theKernel)(int magic, void *tagtable); image_header_t *hdr; struct tag *params, *params_start; char *commandline = getenv("bootargs"); hdr = (image_header_t *)addr; image_start = addr; image_end = addr + hdr->ih_size; theKernel = (void *)ntohl(hdr->ih_ep); /* * Check if there is an initrd image */ if (argc >= 3) { |
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show_boot_progress (9); |
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addr = simple_strtoul(argv[2], NULL, 16); printf("## Loading RAMDISK image at %08lx ... ", addr); memcpy(&header, (char *)addr, sizeof(header)); hdr = &header; if (ntohl(hdr->ih_magic) != IH_MAGIC) { puts("Bad Magic Number "); |
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show_boot_progress (-10); |
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do_reset(cmdtp, flag, argc, argv); } data = (unsigned long)hdr; len = sizeof(*hdr); checksum = ntohl(hdr->ih_hcrc); hdr->ih_hcrc = 0; if (crc32(0, (unsigned char *)data, len) != checksum) { puts("Bad Header Checksum "); |
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show_boot_progress (-11); |
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do_reset(cmdtp, flag, argc, argv); } |
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show_boot_progress (10); |
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print_image_hdr(hdr); data = addr + sizeof(header); len = ntohl(hdr->ih_size); if (verify) { unsigned long csum = 0; puts(" Verifying Checksum ... "); csum = crc32(0, (unsigned char *)data, len); if (csum != ntohl(hdr->ih_dcrc)) { puts("Bad Data CRC "); |
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show_boot_progress (-12); |
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do_reset(cmdtp, flag, argc, argv); } puts("OK "); } |
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show_boot_progress (11); |
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if ((hdr->ih_os != IH_OS_LINUX) || (hdr->ih_arch != IH_CPU_AVR32) || (hdr->ih_type != IH_TYPE_RAMDISK)) { puts("Not a Linux/AVR32 RAMDISK image "); |
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show_boot_progress (-13); |
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do_reset(cmdtp, flag, argc, argv); } } else if ((hdr->ih_type == IH_TYPE_MULTI) && (len_ptr[1])) { ulong tail = ntohl (len_ptr[0]) % 4; int i; |
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show_boot_progress (13); |
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/* skip kernel length and terminator */ data = (ulong) (&len_ptr[2]); /* skip any additional image length fields */ for (i = 1; len_ptr[i]; ++i) data += 4; /* add kernel length, and align */ data += ntohl (len_ptr[0]); if (tail) { data += 4 - tail; } len = ntohl (len_ptr[1]); } else { /* no initrd image */ |
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show_boot_progress (14); |
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len = data = 0; } if (data) { initrd_start = data; initrd_end = initrd_start + len; } else { initrd_start = 0; initrd_end = 0; } |
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show_boot_progress (15); |
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params = params_start = (struct tag *)gd->bd->bi_boot_params; params = setup_start_tag(params); params = setup_memory_tags(params); if (initrd_start) { params = setup_ramdisk_tag(params, PHYSADDR(initrd_start), PHYSADDR(initrd_end)); } params = setup_commandline_tag(params, commandline); params = setup_clock_tags(params); params = setup_ethernet_tags(params); setup_end_tag(params); printf(" Starting kernel at %p (params at %p)... ", theKernel, params_start); prepare_to_boot(); theKernel(ATAG_MAGIC, params_start); } |