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