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 */
blob_encap_dek(const u8 * src,u8 * dst,u32 len)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 */
do_dek_blob(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])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