1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2015 Freescale Semiconductor, Inc.
4 */
5
6 #include <common.h>
7 #include <dm.h>
8 #include <fsl_validate.h>
9 #include <fsl_secboot_err.h>
10 #include <fsl_sfp.h>
11 #include <dm/root.h>
12
13 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_FRAMEWORK)
14 #include <spl.h>
15 #endif
16
17 #ifdef CONFIG_ADDR_MAP
18 #include <asm/mmu.h>
19 #endif
20
21 #ifdef CONFIG_FSL_CORENET
22 #include <asm/fsl_pamu.h>
23 #endif
24
25 #ifdef CONFIG_ARCH_LS1021A
26 #include <asm/arch/immap_ls102xa.h>
27 #endif
28
29 #if defined(CONFIG_MPC85xx)
30 #define CONFIG_DCFG_ADDR CONFIG_SYS_MPC85xx_GUTS_ADDR
31 #else
32 #define CONFIG_DCFG_ADDR CONFIG_SYS_FSL_GUTS_ADDR
33 #endif
34
35 #ifdef CONFIG_SYS_FSL_CCSR_GUR_LE
36 #define gur_in32(a) in_le32(a)
37 #else
38 #define gur_in32(a) in_be32(a)
39 #endif
40
41 /* Check the Boot Mode. If Secure, return 1 else return 0 */
fsl_check_boot_mode_secure(void)42 int fsl_check_boot_mode_secure(void)
43 {
44 uint32_t val;
45 struct ccsr_sfp_regs *sfp_regs = (void *)(CONFIG_SYS_SFP_ADDR);
46 struct ccsr_gur __iomem *gur = (void *)(CONFIG_DCFG_ADDR);
47
48 val = sfp_in32(&sfp_regs->ospr) & ITS_MASK;
49 if (val == ITS_MASK)
50 return 1;
51
52 #if defined(CONFIG_FSL_CORENET) || !defined(CONFIG_MPC85xx)
53 /* For PBL based platforms check the SB_EN bit in RCWSR */
54 val = gur_in32(&gur->rcwsr[RCW_SB_EN_REG_INDEX - 1]) & RCW_SB_EN_MASK;
55 if (val == RCW_SB_EN_MASK)
56 return 1;
57 #endif
58
59 #if defined(CONFIG_MPC85xx) && !defined(CONFIG_FSL_CORENET)
60 /* For Non-PBL Platforms, check the Device Status register 2*/
61 val = gur_in32(&gur->pordevsr2) & MPC85xx_PORDEVSR2_SBC_MASK;
62 if (val != MPC85xx_PORDEVSR2_SBC_MASK)
63 return 1;
64
65 #endif
66 return 0;
67 }
68
69 #ifndef CONFIG_SPL_BUILD
fsl_setenv_chain_of_trust(void)70 int fsl_setenv_chain_of_trust(void)
71 {
72 /* Check Boot Mode
73 * If Boot Mode is Non-Secure, no changes are required
74 */
75 if (fsl_check_boot_mode_secure() == 0)
76 return 0;
77
78 /* If Boot mode is Secure, set the environment variables
79 * bootdelay = 0 (To disable Boot Prompt)
80 * bootcmd = CONFIG_CHAIN_BOOT_CMD (Validate and execute Boot script)
81 */
82 env_set("bootdelay", "0");
83
84 #ifdef CONFIG_ARM
85 env_set("secureboot", "y");
86 #else
87 env_set("bootcmd", CONFIG_CHAIN_BOOT_CMD);
88 #endif
89
90 return 0;
91 }
92 #endif
93
94 #ifdef CONFIG_SPL_BUILD
spl_validate_uboot(uint32_t hdr_addr,uintptr_t img_addr)95 void spl_validate_uboot(uint32_t hdr_addr, uintptr_t img_addr)
96 {
97 int res;
98
99 /*
100 * Check Boot Mode
101 * If Boot Mode is Non-Secure, skip validation
102 */
103 if (fsl_check_boot_mode_secure() == 0)
104 return;
105
106 printf("SPL: Validating U-Boot image\n");
107
108 #ifdef CONFIG_ADDR_MAP
109 init_addr_map();
110 #endif
111
112 #ifdef CONFIG_FSL_CORENET
113 if (pamu_init() < 0)
114 fsl_secboot_handle_error(ERROR_ESBC_PAMU_INIT);
115 #endif
116
117 #ifdef CONFIG_FSL_CAAM
118 if (sec_init() < 0)
119 fsl_secboot_handle_error(ERROR_ESBC_SEC_INIT);
120 #endif
121
122 /*
123 * dm_init_and_scan() is called as part of common SPL framework, so no
124 * need to call it again but in case of powerpc platforms which currently
125 * do not use common SPL framework, so need to call this function here.
126 */
127 #if defined(CONFIG_SPL_DM) && (!defined(CONFIG_SPL_FRAMEWORK))
128 dm_init_and_scan(true);
129 #endif
130 res = fsl_secboot_validate(hdr_addr, CONFIG_SPL_UBOOT_KEY_HASH,
131 &img_addr);
132
133 if (res == 0)
134 printf("SPL: Validation of U-boot successful\n");
135 }
136
137 #ifdef CONFIG_SPL_FRAMEWORK
138 /* Override weak funtion defined in SPL framework to enable validation
139 * of main u-boot image before jumping to u-boot image.
140 */
jump_to_image_no_args(struct spl_image_info * spl_image)141 void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
142 {
143 typedef void __noreturn (*image_entry_noargs_t)(void);
144 uint32_t hdr_addr;
145
146 image_entry_noargs_t image_entry =
147 (image_entry_noargs_t)(unsigned long)spl_image->entry_point;
148
149 hdr_addr = (spl_image->entry_point + spl_image->size -
150 CONFIG_U_BOOT_HDR_SIZE);
151 spl_validate_uboot(hdr_addr, (uintptr_t)spl_image->entry_point);
152 /*
153 * In case of failure in validation, spl_validate_uboot would
154 * not return back in case of Production environment with ITS=1.
155 * Thus U-Boot will not start.
156 * In Development environment (ITS=0 and SB_EN=1), the function
157 * may return back in case of non-fatal failures.
158 */
159
160 debug("image entry point: 0x%lX\n", spl_image->entry_point);
161 image_entry();
162 }
163 #endif /* ifdef CONFIG_SPL_FRAMEWORK */
164 #endif /* ifdef CONFIG_SPL_BUILD */
165