1 /* 2 * (C) Copyright 2003 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * (c) Copyright 2008 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com> 6 * (c) Copyright 2008 Renesas Solutions Corp. 7 * 8 * SPDX-License-Identifier: GPL-2.0+ 9 */ 10 11 #include <common.h> 12 #include <command.h> 13 #include <asm/byteorder.h> 14 #include <asm/zimage.h> 15 16 #ifdef CONFIG_SYS_DEBUG 17 static void hexdump(unsigned char *buf, int len) 18 { 19 int i; 20 21 for (i = 0; i < len; i++) { 22 if ((i % 16) == 0) 23 printf("%s%08x: ", i ? "\n" : "", 24 (unsigned int)&buf[i]); 25 printf("%02x ", buf[i]); 26 } 27 printf("\n"); 28 } 29 #endif 30 31 #ifdef CONFIG_SH_SDRAM_OFFSET 32 #define GET_INITRD_START(initrd, linux) (initrd - linux + CONFIG_SH_SDRAM_OFFSET) 33 #else 34 #define GET_INITRD_START(initrd, linux) (initrd - linux) 35 #endif 36 37 static void set_sh_linux_param(unsigned long param_addr, unsigned long data) 38 { 39 *(unsigned long *)(param_addr) = data; 40 } 41 42 static unsigned long sh_check_cmd_arg(char *cmdline, char *key, int base) 43 { 44 unsigned long val = 0; 45 char *p = strstr(cmdline, key); 46 if (p) { 47 p += strlen(key); 48 val = simple_strtol(p, NULL, base); 49 } 50 return val; 51 } 52 53 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) 54 { 55 /* Linux kernel load address */ 56 void (*kernel) (void) = (void (*)(void))images->ep; 57 /* empty_zero_page */ 58 unsigned char *param 59 = (unsigned char *)image_get_load(images->legacy_hdr_os); 60 /* Linux kernel command line */ 61 char *cmdline = (char *)param + COMMAND_LINE; 62 /* PAGE_SIZE */ 63 unsigned long size = images->ep - (unsigned long)param; 64 char *bootargs = env_get("bootargs"); 65 66 /* 67 * allow the PREP bootm subcommand, it is required for bootm to work 68 */ 69 if (flag & BOOTM_STATE_OS_PREP) 70 return 0; 71 72 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 73 return 1; 74 75 /* Clear zero page */ 76 memset(param, 0, size); 77 78 /* Set commandline */ 79 strcpy(cmdline, bootargs); 80 81 /* Initrd */ 82 if (images->rd_start || images->rd_end) { 83 unsigned long ramdisk_flags = 0; 84 int val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_PROMPT, 10); 85 if (val == 1) 86 ramdisk_flags |= RD_PROMPT; 87 else 88 ramdisk_flags &= ~RD_PROMPT; 89 90 val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_DOLOAD, 10); 91 if (val == 1) 92 ramdisk_flags |= RD_DOLOAD; 93 else 94 ramdisk_flags &= ~RD_DOLOAD; 95 96 set_sh_linux_param((unsigned long)param + MOUNT_ROOT_RDONLY, 0x0001); 97 set_sh_linux_param((unsigned long)param + RAMDISK_FLAGS, ramdisk_flags); 98 set_sh_linux_param((unsigned long)param + ORIG_ROOT_DEV, 0x0200); 99 set_sh_linux_param((unsigned long)param + LOADER_TYPE, 0x0001); 100 set_sh_linux_param((unsigned long)param + INITRD_START, 101 GET_INITRD_START(images->rd_start, CONFIG_SYS_SDRAM_BASE)); 102 set_sh_linux_param((unsigned long)param + INITRD_SIZE, 103 images->rd_end - images->rd_start); 104 } 105 106 /* Boot kernel */ 107 kernel(); 108 109 /* does not return */ 110 return 1; 111 } 112