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 DECLARE_GLOBAL_DATA_PTR; 20 21 /** 22 * blob_dek() - Encapsulate the DEK as a blob using CAM's Key 23 * @src: - Address of data to be encapsulated 24 * @dst: - Desination address of encapsulated data 25 * @len: - Size of data to be encapsulated 26 * 27 * Returns zero on success,and negative on error. 28 */ 29 static int blob_encap_dek(const u8 *src, u8 *dst, u32 len) 30 { 31 int ret = 0; 32 u32 jr_size = 4; 33 34 u32 out_jr_size = sec_in32(CONFIG_SYS_FSL_JR0_ADDR + 0x102c); 35 if (out_jr_size != jr_size) { 36 hab_caam_clock_enable(1); 37 sec_init(); 38 } 39 40 if (!((len == 128) | (len == 192) | (len == 256))) { 41 debug("Invalid DEK size. Valid sizes are 128, 192 and 256b\n"); 42 return -1; 43 } 44 45 len /= 8; 46 ret = blob_dek(src, dst, len); 47 48 return ret; 49 } 50 51 /** 52 * do_dek_blob() - Handle the "dek_blob" command-line command 53 * @cmdtp: Command data struct pointer 54 * @flag: Command flag 55 * @argc: Command-line argument count 56 * @argv: Array of command-line arguments 57 * 58 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative 59 * on error. 60 */ 61 static int do_dek_blob(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) 62 { 63 uint32_t src_addr, dst_addr, len; 64 uint8_t *src_ptr, *dst_ptr; 65 int ret = 0; 66 67 if (argc != 4) 68 return CMD_RET_USAGE; 69 70 src_addr = simple_strtoul(argv[1], NULL, 16); 71 dst_addr = simple_strtoul(argv[2], NULL, 16); 72 len = simple_strtoul(argv[3], NULL, 10); 73 74 src_ptr = map_sysmem(src_addr, len/8); 75 dst_ptr = map_sysmem(dst_addr, BLOB_SIZE(len/8)); 76 77 ret = blob_encap_dek(src_ptr, dst_ptr, len); 78 79 return ret; 80 } 81 82 /***************************************************/ 83 static char dek_blob_help_text[] = 84 "src dst len - Encapsulate and create blob of data\n" 85 " $len bits long at address $src and\n" 86 " store the result at address $dst.\n"; 87 88 U_BOOT_CMD( 89 dek_blob, 4, 1, do_dek_blob, 90 "Data Encryption Key blob encapsulation", 91 dek_blob_help_text 92 ); 93