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