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 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 44 return 1; 45 46 int ret; 47 48 char *of_flat_tree = NULL; 49 #if defined(CONFIG_OF_LIBFDT) 50 /* did generic code already find a device tree? */ 51 if (images->ft_len) 52 of_flat_tree = images->ft_addr; 53 #endif 54 55 thekernel = (void (*)(char *, ulong, ulong))images->ep; 56 57 /* find ramdisk */ 58 ret = boot_get_ramdisk(argc, argv, images, IH_ARCH_MICROBLAZE, 59 &rd_data_start, &rd_data_end); 60 if (ret) 61 return 1; 62 63 bootstage_mark(BOOTSTAGE_ID_RUN_OS); 64 65 if (!of_flat_tree && argc > 3) 66 of_flat_tree = (char *)simple_strtoul(argv[3], NULL, 16); 67 68 /* fixup the initrd now that we know where it should be */ 69 if (images->rd_start && images->rd_end && of_flat_tree) 70 ret = fdt_initrd(of_flat_tree, images->rd_start, 71 images->rd_end, 1); 72 if (ret) 73 return 1; 74 75 #ifdef DEBUG 76 printf("## Transferring control to Linux (at address 0x%08lx) ", 77 (ulong)thekernel); 78 printf("ramdisk 0x%08lx, FDT 0x%08lx...\n", 79 rd_data_start, (ulong) of_flat_tree); 80 #endif 81 82 #ifdef XILINX_USE_DCACHE 83 flush_cache(0, XILINX_DCACHE_BYTE_SIZE); 84 #endif 85 /* 86 * Linux Kernel Parameters (passing device tree): 87 * r5: pointer to command line 88 * r6: pointer to ramdisk 89 * r7: pointer to the fdt, followed by the board info data 90 */ 91 thekernel(commandline, rd_data_start, (ulong)of_flat_tree); 92 /* does not return */ 93 94 return 1; 95 } 96