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 <fdt_support.h> 14 #include <image.h> 15 #include <u-boot/zlib.h> 16 #include <asm/byteorder.h> 17 18 DECLARE_GLOBAL_DATA_PTR; 19 20 int do_bootm_linux(int flag, int argc, char * const argv[], 21 bootm_headers_t *images) 22 { 23 /* First parameter is mapped to $r5 for kernel boot args */ 24 void (*thekernel) (char *, ulong, ulong); 25 char *commandline = getenv("bootargs"); 26 ulong rd_data_start, rd_data_end; 27 28 /* 29 * allow the PREP bootm subcommand, it is required for bootm to work 30 */ 31 if (flag & BOOTM_STATE_OS_PREP) 32 return 0; 33 34 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 35 return 1; 36 37 int ret; 38 39 char *of_flat_tree = NULL; 40 #if defined(CONFIG_OF_LIBFDT) 41 /* did generic code already find a device tree? */ 42 if (images->ft_len) 43 of_flat_tree = images->ft_addr; 44 #endif 45 46 thekernel = (void (*)(char *, ulong, ulong))images->ep; 47 48 /* find ramdisk */ 49 ret = boot_get_ramdisk(argc, argv, images, IH_ARCH_MICROBLAZE, 50 &rd_data_start, &rd_data_end); 51 if (ret) 52 return 1; 53 54 bootstage_mark(BOOTSTAGE_ID_RUN_OS); 55 56 if (!of_flat_tree && argc > 1) 57 of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16); 58 59 /* fixup the initrd now that we know where it should be */ 60 if (images->rd_start && images->rd_end && of_flat_tree) 61 ret = fdt_initrd(of_flat_tree, images->rd_start, 62 images->rd_end); 63 if (ret) 64 return 1; 65 66 #ifdef DEBUG 67 printf("## Transferring control to Linux (at address 0x%08lx) ", 68 (ulong)thekernel); 69 printf("ramdisk 0x%08lx, FDT 0x%08lx...\n", 70 rd_data_start, (ulong) of_flat_tree); 71 #endif 72 73 #ifdef XILINX_USE_DCACHE 74 flush_cache(0, XILINX_DCACHE_BYTE_SIZE); 75 #endif 76 /* 77 * Linux Kernel Parameters (passing device tree): 78 * r5: pointer to command line 79 * r6: pointer to ramdisk 80 * r7: pointer to the fdt, followed by the board info data 81 */ 82 thekernel(commandline, rd_data_start, (ulong)of_flat_tree); 83 /* does not return */ 84 85 return 1; 86 } 87