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 * SPDX-License-Identifier: GPL-2.0+ 9 */ 10 11 #include <common.h> 12 #include <command.h> 13 #include <image.h> 14 #include <u-boot/zlib.h> 15 #include <asm/byteorder.h> 16 17 DECLARE_GLOBAL_DATA_PTR; 18 19 int do_bootm_linux(int flag, int argc, char * const argv[], 20 bootm_headers_t *images) 21 { 22 /* First parameter is mapped to $r5 for kernel boot args */ 23 void (*thekernel) (char *, ulong, ulong); 24 char *commandline = getenv("bootargs"); 25 ulong rd_data_start, rd_data_end; 26 27 /* 28 * allow the PREP bootm subcommand, it is required for bootm to work 29 */ 30 if (flag & BOOTM_STATE_OS_PREP) 31 return 0; 32 33 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 34 return 1; 35 36 int ret; 37 38 char *of_flat_tree = NULL; 39 #if defined(CONFIG_OF_LIBFDT) 40 /* did generic code already find a device tree? */ 41 if (images->ft_len) 42 of_flat_tree = images->ft_addr; 43 #endif 44 45 thekernel = (void (*)(char *, ulong, ulong))images->ep; 46 47 /* find ramdisk */ 48 ret = boot_get_ramdisk(argc, argv, images, IH_ARCH_MICROBLAZE, 49 &rd_data_start, &rd_data_end); 50 if (ret) 51 return 1; 52 53 bootstage_mark(BOOTSTAGE_ID_RUN_OS); 54 55 if (!of_flat_tree && argc > 1) 56 of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16); 57 58 /* fixup the initrd now that we know where it should be */ 59 if (images->rd_start && images->rd_end && of_flat_tree) 60 ret = fdt_initrd(of_flat_tree, images->rd_start, 61 images->rd_end); 62 if (ret) 63 return 1; 64 65 #ifdef DEBUG 66 printf("## Transferring control to Linux (at address 0x%08lx) ", 67 (ulong)thekernel); 68 printf("ramdisk 0x%08lx, FDT 0x%08lx...\n", 69 rd_data_start, (ulong) of_flat_tree); 70 #endif 71 72 #ifdef XILINX_USE_DCACHE 73 flush_cache(0, XILINX_DCACHE_BYTE_SIZE); 74 #endif 75 /* 76 * Linux Kernel Parameters (passing device tree): 77 * r5: pointer to command line 78 * r6: pointer to ramdisk 79 * r7: pointer to the fdt, followed by the board info data 80 */ 81 thekernel(commandline, rd_data_start, (ulong)of_flat_tree); 82 /* does not return */ 83 84 return 1; 85 } 86