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Diffstat (limited to 'arch/nds32/lib/bootm.c')
| -rw-r--r-- | arch/nds32/lib/bootm.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/arch/nds32/lib/bootm.c b/arch/nds32/lib/bootm.c new file mode 100644 index 0000000..b0a5a0d --- /dev/null +++ b/arch/nds32/lib/bootm.c @@ -0,0 +1,241 @@ +/* + * Copyright (C) 2011 Andes Technology Corporation + * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com> + * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com> + * + * 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> + +DECLARE_GLOBAL_DATA_PTR; + +#if defined(CONFIG_SETUP_MEMORY_TAGS) || \ + defined(CONFIG_CMDLINE_TAG) || \ + defined(CONFIG_INITRD_TAG) || \ + defined(CONFIG_SERIAL_TAG) || \ + defined(CONFIG_REVISION_TAG) +static void setup_start_tag(bd_t *bd); + +# ifdef CONFIG_SETUP_MEMORY_TAGS +static void setup_memory_tags(bd_t *bd); +# endif +static void setup_commandline_tag(bd_t *bd, char *commandline); + +# ifdef CONFIG_INITRD_TAG +static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end); +# endif +static void setup_end_tag(bd_t *bd); + +static struct tag *params; +#endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */ + +int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images) +{ + bd_t *bd = gd->bd; + char *s; + int machid = bd->bi_arch_number; + void (*theKernel)(int zero, int arch, uint params); + +#ifdef CONFIG_CMDLINE_TAG + char *commandline = getenv("bootargs"); +#endif + + if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) + return 1; + + theKernel = (void (*)(int, int, uint))images->ep; + + s = getenv("machid"); + if (s) { + machid = simple_strtoul(s, NULL, 16); + printf("Using machid 0x%x from environment\n", machid); + } + + show_boot_progress(15); + + debug("## Transferring control to Linux (at address %08lx) ...\n", + (ulong)theKernel); + +#if defined(CONFIG_SETUP_MEMORY_TAGS) || \ + defined(CONFIG_CMDLINE_TAG) || \ + defined(CONFIG_INITRD_TAG) || \ + defined(CONFIG_SERIAL_TAG) || \ + defined(CONFIG_REVISION_TAG) + setup_start_tag(bd); +#ifdef CONFIG_SERIAL_TAG + setup_serial_tag(¶ms); +#endif +#ifdef CONFIG_REVISION_TAG + setup_revision_tag(¶ms); +#endif +#ifdef CONFIG_SETUP_MEMORY_TAGS + setup_memory_tags(bd); +#endif +#ifdef CONFIG_CMDLINE_TAG + setup_commandline_tag(bd, commandline); +#endif +#ifdef CONFIG_INITRD_TAG + if (images->rd_start && images->rd_end) + setup_initrd_tag(bd, images->rd_start, images->rd_end); +#endif + setup_end_tag(bd); +#endif + + /* we assume that the kernel is in place */ + printf("\nStarting kernel ...\n\n"); + +#ifdef CONFIG_USB_DEVICE + { + extern void udc_disconnect(void); + udc_disconnect(); + } +#endif + + cleanup_before_linux(); + + theKernel(0, machid, bd->bi_boot_params); + /* does not return */ + + return 1; +} + + +#if defined(CONFIG_SETUP_MEMORY_TAGS) || \ + defined(CONFIG_CMDLINE_TAG) || \ + defined(CONFIG_INITRD_TAG) || \ + defined(CONFIG_SERIAL_TAG) || \ + defined(CONFIG_REVISION_TAG) +static void setup_start_tag(bd_t *bd) +{ + params = (struct tag *)bd->bi_boot_params; + + params->hdr.tag = ATAG_CORE; + params->hdr.size = tag_size(tag_core); + + params->u.core.flags = 0; + params->u.core.pagesize = 0; + params->u.core.rootdev = 0; + + params = tag_next(params); +} + + +#ifdef CONFIG_SETUP_MEMORY_TAGS +static void setup_memory_tags(bd_t *bd) +{ + int i; + + for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) { + params->hdr.tag = ATAG_MEM; + params->hdr.size = tag_size(tag_mem32); + + params->u.mem.start = bd->bi_dram[i].start; + params->u.mem.size = bd->bi_dram[i].size; + + params = tag_next(params); + } +} +#endif /* CONFIG_SETUP_MEMORY_TAGS */ + + +static void setup_commandline_tag(bd_t *bd, char *commandline) +{ + char *p; + + if (!commandline) + return; + + /* eat leading white space */ + for (p = commandline; *p == ' '; p++) + ; + + /* skip non-existent command lines so the kernel will still + * use its default command line. + */ + if (*p == '\0') + return; + + params->hdr.tag = ATAG_CMDLINE; + params->hdr.size = + (sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2; + + strcpy(params->u.cmdline.cmdline, p) + ; + + params = tag_next(params); +} + + +#ifdef CONFIG_INITRD_TAG +static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end) +{ + /* an ATAG_INITRD node tells the kernel where the compressed + * ramdisk can be found. ATAG_RDIMG is a better name, actually. + */ + params->hdr.tag = ATAG_INITRD2; + params->hdr.size = tag_size(tag_initrd); + + params->u.initrd.start = initrd_start; + params->u.initrd.size = initrd_end - initrd_start; + + params = tag_next(params); +} +#endif /* CONFIG_INITRD_TAG */ + +#ifdef CONFIG_SERIAL_TAG +void setup_serial_tag(struct tag **tmp) +{ + struct tag *params = *tmp; + struct tag_serialnr serialnr; + void get_board_serial(struct tag_serialnr *serialnr); + + get_board_serial(&serialnr); + params->hdr.tag = ATAG_SERIAL; + params->hdr.size = tag_size(tag_serialnr); + params->u.serialnr.low = serialnr.low; + params->u.serialnr.high = serialnr.high; + params = tag_next(params); + *tmp = params; +} +#endif + +#ifdef CONFIG_REVISION_TAG +void setup_revision_tag(struct tag **in_params) +{ + u32 rev = 0; + u32 get_board_rev(void); + + rev = get_board_rev(); + params->hdr.tag = ATAG_REVISION; + params->hdr.size = tag_size(tag_revision); + params->u.revision.rev = rev; + params = tag_next(params); +} +#endif /* CONFIG_REVISION_TAG */ + + +static void setup_end_tag(bd_t *bd) +{ + params->hdr.tag = ATAG_NONE; + params->hdr.size = 0; +} + +#endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */ |