1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2007 Michal Simek 4 * (C) Copyright 2004 Atmark Techno, Inc. 5 * 6 * Michal SIMEK <monstr@monstr.eu> 7 * Yasushi SHOJI <yashi@atmark-techno.com> 8 */ 9 10 #include <common.h> 11 #include <command.h> 12 #include <fdt_support.h> 13 #include <image.h> 14 #include <u-boot/zlib.h> 15 #include <asm/byteorder.h> 16 17 int do_bootm_linux(int flag, int argc, char * const argv[], 18 bootm_headers_t *images) 19 { 20 /* First parameter is mapped to $r5 for kernel boot args */ 21 void (*thekernel) (char *, ulong, ulong); 22 char *commandline = env_get("bootargs"); 23 ulong rd_data_start, rd_data_end; 24 25 /* 26 * allow the PREP bootm subcommand, it is required for bootm to work 27 */ 28 if (flag & BOOTM_STATE_OS_PREP) 29 return 0; 30 31 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 32 return 1; 33 34 int ret; 35 36 char *of_flat_tree = NULL; 37 #if defined(CONFIG_OF_LIBFDT) 38 /* did generic code already find a device tree? */ 39 if (images->ft_len) 40 of_flat_tree = images->ft_addr; 41 #endif 42 43 thekernel = (void (*)(char *, ulong, ulong))images->ep; 44 45 /* find ramdisk */ 46 ret = boot_get_ramdisk(argc, argv, images, IH_ARCH_MICROBLAZE, 47 &rd_data_start, &rd_data_end); 48 if (ret) 49 return 1; 50 51 bootstage_mark(BOOTSTAGE_ID_RUN_OS); 52 53 if (!of_flat_tree && argc > 1) 54 of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16); 55 56 /* fixup the initrd now that we know where it should be */ 57 if (images->rd_start && images->rd_end && of_flat_tree) { 58 ret = fdt_initrd(of_flat_tree, images->rd_start, 59 images->rd_end); 60 if (ret) 61 return 1; 62 } 63 64 #ifdef DEBUG 65 printf("## Transferring control to Linux (at address 0x%08lx) ", 66 (ulong)thekernel); 67 printf("ramdisk 0x%08lx, FDT 0x%08lx...\n", 68 rd_data_start, (ulong) of_flat_tree); 69 #endif 70 71 #ifdef XILINX_USE_DCACHE 72 flush_cache(0, XILINX_DCACHE_BYTE_SIZE); 73 #endif 74 /* 75 * Linux Kernel Parameters (passing device tree): 76 * r5: pointer to command line 77 * r6: pointer to ramdisk 78 * r7: pointer to the fdt, followed by the board info data 79 */ 80 thekernel(commandline, rd_data_start, (ulong)of_flat_tree); 81 /* does not return */ 82 83 return 1; 84 } 85