1 /* 2 * Copyright 2008-2015 Freescale Semiconductor, Inc. 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 * 6 * Command for encapsulating DEK blob 7 */ 8 9 #include <common.h> 10 #include <command.h> 11 #include <environment.h> 12 #include <malloc.h> 13 #include <asm/byteorder.h> 14 #include <linux/compiler.h> 15 #include <fsl_sec.h> 16 #include <asm/arch/clock.h> 17 #include <mapmem.h> 18 19 /** 20 * blob_dek() - Encapsulate the DEK as a blob using CAM's Key 21 * @src: - Address of data to be encapsulated 22 * @dst: - Desination address of encapsulated data 23 * @len: - Size of data to be encapsulated 24 * 25 * Returns zero on success,and negative on error. 26 */ 27 static int blob_encap_dek(const u8 *src, u8 *dst, u32 len) 28 { 29 int ret = 0; 30 u32 jr_size = 4; 31 32 u32 out_jr_size = sec_in32(CONFIG_SYS_FSL_JR0_ADDR + 0x102c); 33 if (out_jr_size != jr_size) { 34 hab_caam_clock_enable(1); 35 sec_init(); 36 } 37 38 if (!((len == 128) | (len == 192) | (len == 256))) { 39 debug("Invalid DEK size. Valid sizes are 128, 192 and 256b\n"); 40 return -1; 41 } 42 43 len /= 8; 44 ret = blob_dek(src, dst, len); 45 46 return ret; 47 } 48 49 /** 50 * do_dek_blob() - Handle the "dek_blob" command-line command 51 * @cmdtp: Command data struct pointer 52 * @flag: Command flag 53 * @argc: Command-line argument count 54 * @argv: Array of command-line arguments 55 * 56 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative 57 * on error. 58 */ 59 static int do_dek_blob(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) 60 { 61 uint32_t src_addr, dst_addr, len; 62 uint8_t *src_ptr, *dst_ptr; 63 int ret = 0; 64 65 if (argc != 4) 66 return CMD_RET_USAGE; 67 68 src_addr = simple_strtoul(argv[1], NULL, 16); 69 dst_addr = simple_strtoul(argv[2], NULL, 16); 70 len = simple_strtoul(argv[3], NULL, 10); 71 72 src_ptr = map_sysmem(src_addr, len/8); 73 dst_ptr = map_sysmem(dst_addr, BLOB_SIZE(len/8)); 74 75 ret = blob_encap_dek(src_ptr, dst_ptr, len); 76 77 return ret; 78 } 79 80 /***************************************************/ 81 static char dek_blob_help_text[] = 82 "src dst len - Encapsulate and create blob of data\n" 83 " $len bits long at address $src and\n" 84 " store the result at address $dst.\n"; 85 86 U_BOOT_CMD( 87 dek_blob, 4, 1, do_dek_blob, 88 "Data Encryption Key blob encapsulation", 89 dek_blob_help_text 90 ); 91