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[], bootm_headers_t *images) 36 { 37 /* First parameter is mapped to $r5 for kernel boot args */ 38 void (*theKernel) (char *, ulong, ulong); 39 char *commandline = getenv ("bootargs"); 40 ulong rd_data_start, rd_data_end; 41 42 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 43 return 1; 44 45 int ret; 46 47 char *of_flat_tree = NULL; 48 #if defined(CONFIG_OF_LIBFDT) 49 ulong of_size = 0; 50 51 /* find flattened device tree */ 52 ret = boot_get_fdt (flag, argc, argv, images, &of_flat_tree, &of_size); 53 if (ret) 54 return 1; 55 #endif 56 57 theKernel = (void (*)(char *, ulong, ulong))images->ep; 58 59 /* find ramdisk */ 60 ret = boot_get_ramdisk (argc, argv, images, IH_ARCH_MICROBLAZE, 61 &rd_data_start, &rd_data_end); 62 if (ret) 63 return 1; 64 65 show_boot_progress (15); 66 67 if (!(ulong) of_flat_tree) 68 of_flat_tree = (char *)simple_strtoul (argv[3], NULL, 16); 69 70 #ifdef DEBUG 71 printf ("## Transferring control to Linux (at address 0x%08lx) " \ 72 "ramdisk 0x%08lx, FDT 0x%08lx...\n", 73 (ulong) theKernel, rd_data_start, (ulong) of_flat_tree); 74 #endif 75 76 #ifdef XILINX_USE_DCACHE 77 #ifdef XILINX_DCACHE_BYTE_SIZE 78 flush_cache(0, XILINX_DCACHE_BYTE_SIZE); 79 #else 80 #warning please rebuild BSPs and update configuration 81 flush_cache(0, 32768); 82 #endif 83 #endif 84 /* 85 * Linux Kernel Parameters (passing device tree): 86 * r5: pointer to command line 87 * r6: pointer to ramdisk 88 * r7: pointer to the fdt, followed by the board info data 89 */ 90 theKernel (commandline, rd_data_start, (ulong) of_flat_tree); 91 /* does not return */ 92 93 return 1; 94 } 95