1 /* 2 * (C) Copyright 2007 Michal Simek 3 * (C) Copyright 2004 Atmark Techno, Inc. 4 * 5 * Michal SIMEK <monstr@monstr.eu> 6 * Yasushi SHOJI <yashi@atmark-techno.com> 7 * 8 * See file CREDITS for list of people who contributed to this 9 * project. 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License as 13 * published by the Free Software Foundation; either version 2 of 14 * the License, or (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 24 * MA 02111-1307 USA 25 */ 26 27 #include <common.h> 28 #include <command.h> 29 #include <image.h> 30 #include <u-boot/zlib.h> 31 #include <asm/byteorder.h> 32 33 DECLARE_GLOBAL_DATA_PTR; 34 35 int do_bootm_linux(int flag, int argc, char * const argv[], 36 bootm_headers_t *images) 37 { 38 /* First parameter is mapped to $r5 for kernel boot args */ 39 void (*thekernel) (char *, ulong, ulong); 40 char *commandline = getenv("bootargs"); 41 ulong rd_data_start, rd_data_end; 42 43 /* 44 * allow the PREP bootm subcommand, it is required for bootm to work 45 */ 46 if (flag & BOOTM_STATE_OS_PREP) 47 return 0; 48 49 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 50 return 1; 51 52 int ret; 53 54 char *of_flat_tree = NULL; 55 #if defined(CONFIG_OF_LIBFDT) 56 /* did generic code already find a device tree? */ 57 if (images->ft_len) 58 of_flat_tree = images->ft_addr; 59 #endif 60 61 thekernel = (void (*)(char *, ulong, ulong))images->ep; 62 63 /* find ramdisk */ 64 ret = boot_get_ramdisk(argc, argv, images, IH_ARCH_MICROBLAZE, 65 &rd_data_start, &rd_data_end); 66 if (ret) 67 return 1; 68 69 bootstage_mark(BOOTSTAGE_ID_RUN_OS); 70 71 if (!of_flat_tree && argc > 1) 72 of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16); 73 74 /* fixup the initrd now that we know where it should be */ 75 if (images->rd_start && images->rd_end && of_flat_tree) 76 ret = fdt_initrd(of_flat_tree, images->rd_start, 77 images->rd_end, 1); 78 if (ret) 79 return 1; 80 81 #ifdef DEBUG 82 printf("## Transferring control to Linux (at address 0x%08lx) ", 83 (ulong)thekernel); 84 printf("ramdisk 0x%08lx, FDT 0x%08lx...\n", 85 rd_data_start, (ulong) of_flat_tree); 86 #endif 87 88 #ifdef XILINX_USE_DCACHE 89 flush_cache(0, XILINX_DCACHE_BYTE_SIZE); 90 #endif 91 /* 92 * Linux Kernel Parameters (passing device tree): 93 * r5: pointer to command line 94 * r6: pointer to ramdisk 95 * r7: pointer to the fdt, followed by the board info data 96 */ 97 thekernel(commandline, rd_data_start, (ulong)of_flat_tree); 98 /* does not return */ 99 100 return 1; 101 } 102