blob: d93d5fb240d092278099e536598fd3bcd363df54 [file] [log] [blame]
Raul Cardenasb5a36d82015-02-27 11:22:06 -06001/*
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
18DECLARE_GLOBAL_DATA_PTR;
19
20/**
21* blob_dek() - Encapsulate the DEK as a blob using CAM's Key
22* @src: - Address of data to be encapsulated
23* @dst: - Desination address of encapsulated data
24* @len: - Size of data to be encapsulated
25*
26* Returns zero on success,and negative on error.
27*/
28static int blob_encap_dek(const u8 *src, u8 *dst, u32 len)
29{
30 int ret = 0;
31 u32 jr_size = 4;
32
33 u32 out_jr_size = sec_in32(CONFIG_SYS_FSL_JR0_ADDR + 0x102c);
34 if (out_jr_size != jr_size) {
35 hab_caam_clock_enable(1);
36 sec_init();
37 }
38
39 if (!((len == 128) | (len == 192) | (len == 256))) {
40 debug("Invalid DEK size. Valid sizes are 128, 192 and 256b\n");
41 return -1;
42 }
43
44 len /= 8;
45 ret = blob_dek(src, dst, len);
46
47 return ret;
48}
49
50/**
51 * do_dek_blob() - Handle the "dek_blob" command-line command
52 * @cmdtp: Command data struct pointer
53 * @flag: Command flag
54 * @argc: Command-line argument count
55 * @argv: Array of command-line arguments
56 *
57 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
58 * on error.
59 */
60static int do_dek_blob(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
61{
62 uint32_t src_addr, dst_addr, len;
63 uint8_t *src_ptr, *dst_ptr;
64 int ret = 0;
65
66 if (argc != 4)
67 return CMD_RET_USAGE;
68
69 src_addr = simple_strtoul(argv[1], NULL, 16);
70 dst_addr = simple_strtoul(argv[2], NULL, 16);
71 len = simple_strtoul(argv[3], NULL, 10);
72
73 src_ptr = map_sysmem(src_addr, len/8);
74 dst_ptr = map_sysmem(dst_addr, BLOB_SIZE(len/8));
75
76 ret = blob_encap_dek(src_ptr, dst_ptr, len);
77
78 return ret;
79}
80
81/***************************************************/
82static char dek_blob_help_text[] =
83 "src dst len - Encapsulate and create blob of data\n"
84 " $len bits long at address $src and\n"
85 " store the result at address $dst.\n";
86
87U_BOOT_CMD(
88 dek_blob, 4, 1, do_dek_blob,
89 "Data Encryption Key blob encapsulation",
90 dek_blob_help_text
91);