From 7b64fef33c66be648826c0ff9758298ef13d0604 Mon Sep 17 00:00:00 2001 From: Wolfgang Denk Date: Tue, 24 Oct 2006 14:21:16 +0200 Subject: Add AVR32 architecture support 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 --- lib_avr32/avr32_linux.c | 315 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 315 insertions(+) create mode 100644 lib_avr32/avr32_linux.c (limited to 'lib_avr32/avr32_linux.c') diff --git a/lib_avr32/avr32_linux.c b/lib_avr32/avr32_linux.c new file mode 100644 index 0000000..d128dfb --- /dev/null +++ b/lib_avr32/avr32_linux.c @@ -0,0 +1,315 @@ +/* + * 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 +#include +#include +#include +#include +#include +#include +#include +#include + +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); + +#ifdef CONFIG_SHOW_BOOT_PROGRESS +# include +# define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg) +#else +# define SHOW_BOOT_PROGRESS(arg) +#endif + +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; + params->u.clock.clock_hz = pm_get_clock_freq(CLOCK_HSB); +#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) { + SHOW_BOOT_PROGRESS(9); + + addr = simple_strtoul(argv[2], NULL, 16); + + printf("## Loading RAMDISK image at %08lx ...\n", addr); + + memcpy(&header, (char *)addr, sizeof(header)); + hdr = &header; + + if (ntohl(hdr->ih_magic) != IH_MAGIC) { + puts("Bad Magic Number\n"); + SHOW_BOOT_PROGRESS(-10); + 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\n"); + SHOW_BOOT_PROGRESS(-11); + do_reset(cmdtp, flag, argc, argv); + } + + SHOW_BOOT_PROGRESS(10); + + 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\n"); + SHOW_BOOT_PROGRESS(-12); + do_reset(cmdtp, flag, argc, argv); + } + puts("OK\n"); + } + + SHOW_BOOT_PROGRESS(11); + + 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\n"); + SHOW_BOOT_PROGRESS(-13); + 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; + + SHOW_BOOT_PROGRESS (13); + + /* 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 */ + SHOW_BOOT_PROGRESS(14); + len = data = 0; + } + + if (data) { + initrd_start = data; + initrd_end = initrd_start + len; + } else { + initrd_start = 0; + initrd_end = 0; + } + + 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 (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("\nStarting kernel at %p (params at %p)...\n\n", + theKernel, params_start); + + prepare_to_boot(); + + theKernel(ATAG_MAGIC, params_start); +} -- cgit v1.1