1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright 2016 NXP Semiconductor, Inc.
4  */
5 #include <common.h>
6 #include <malloc.h>
7 #include <config.h>
8 #include <errno.h>
9 #include <asm/system.h>
10 #include <asm/types.h>
11 #include <asm/arch/soc.h>
12 #ifdef CONFIG_FSL_LSCH3
13 #include <asm/arch/immap_lsch3.h>
14 #elif defined(CONFIG_FSL_LSCH2)
15 #include <asm/arch/immap_lsch2.h>
16 #endif
17 #ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
18 #include <asm/armv8/sec_firmware.h>
19 #endif
20 #ifdef CONFIG_CHAIN_OF_TRUST
21 #include <fsl_validate.h>
22 #endif
23 
24 #ifdef CONFIG_SYS_LS_PPA_FW_IN_NAND
25 #include <nand.h>
26 #elif defined(CONFIG_SYS_LS_PPA_FW_IN_MMC)
27 #include <mmc.h>
28 #endif
29 
30 DECLARE_GLOBAL_DATA_PTR;
31 
ppa_init(void)32 int ppa_init(void)
33 {
34 	unsigned int el = current_el();
35 	void *ppa_fit_addr;
36 	u32 *boot_loc_ptr_l, *boot_loc_ptr_h;
37 	u32 *loadable_l, *loadable_h;
38 	int ret;
39 
40 #ifdef CONFIG_CHAIN_OF_TRUST
41 	uintptr_t ppa_esbc_hdr = 0;
42 	uintptr_t ppa_img_addr = 0;
43 #if defined(CONFIG_SYS_LS_PPA_FW_IN_MMC) || \
44 	defined(CONFIG_SYS_LS_PPA_FW_IN_NAND)
45 	void *ppa_hdr_ddr;
46 #endif
47 #endif
48 
49 	/* Skip if running at lower exception level */
50 	if (el < 3) {
51 		debug("Skipping PPA init, running at EL%d\n", el);
52 		return 0;
53 	}
54 
55 #ifdef CONFIG_SYS_LS_PPA_FW_IN_XIP
56 	ppa_fit_addr = (void *)CONFIG_SYS_LS_PPA_FW_ADDR;
57 	debug("%s: PPA image load from XIP\n", __func__);
58 #ifdef CONFIG_CHAIN_OF_TRUST
59 	ppa_esbc_hdr = CONFIG_SYS_LS_PPA_ESBC_ADDR;
60 #endif
61 #else /* !CONFIG_SYS_LS_PPA_FW_IN_XIP */
62 	size_t fw_length, fdt_header_len = sizeof(struct fdt_header);
63 
64 	/* Copy PPA image from MMC/SD/NAND to allocated memory */
65 #ifdef CONFIG_SYS_LS_PPA_FW_IN_MMC
66 	struct mmc *mmc;
67 	int dev = CONFIG_SYS_MMC_ENV_DEV;
68 	struct fdt_header *fitp;
69 	u32 cnt;
70 	u32 blk;
71 
72 	debug("%s: PPA image load from eMMC/SD\n", __func__);
73 
74 	ret = mmc_initialize(gd->bd);
75 	if (ret) {
76 		printf("%s: mmc_initialize() failed\n", __func__);
77 		return ret;
78 	}
79 	mmc = find_mmc_device(dev);
80 	if (!mmc) {
81 		printf("PPA: MMC cannot find device for PPA firmware\n");
82 		return -ENODEV;
83 	}
84 
85 	ret = mmc_init(mmc);
86 	if (ret) {
87 		printf("%s: mmc_init() failed\n", __func__);
88 		return ret;
89 	}
90 
91 	fitp = malloc(roundup(fdt_header_len, 512));
92 	if (!fitp) {
93 		printf("PPA: malloc failed for FIT header(size 0x%zx)\n",
94 		       roundup(fdt_header_len, 512));
95 		return -ENOMEM;
96 	}
97 
98 	blk = CONFIG_SYS_LS_PPA_FW_ADDR / 512;
99 	cnt = DIV_ROUND_UP(fdt_header_len, 512);
100 	debug("%s: MMC read PPA FIT header: dev # %u, block # %u, count %u\n",
101 	      __func__, dev, blk, cnt);
102 	ret = blk_dread(mmc_get_blk_desc(mmc), blk, cnt, fitp);
103 	if (ret != cnt) {
104 		free(fitp);
105 		printf("MMC/SD read of PPA FIT header at offset 0x%x failed\n",
106 		       CONFIG_SYS_LS_PPA_FW_ADDR);
107 		return -EIO;
108 	}
109 
110 	ret = fdt_check_header(fitp);
111 	if (ret) {
112 		free(fitp);
113 		printf("%s: fdt_check_header() failed\n", __func__);
114 		return ret;
115 	}
116 
117 #ifdef CONFIG_CHAIN_OF_TRUST
118 	ppa_hdr_ddr = malloc(CONFIG_LS_PPA_ESBC_HDR_SIZE);
119 	if (!ppa_hdr_ddr) {
120 		printf("PPA: malloc failed for PPA header\n");
121 		return -ENOMEM;
122 	}
123 
124 	blk = CONFIG_SYS_LS_PPA_ESBC_ADDR >> 9;
125 	cnt = DIV_ROUND_UP(CONFIG_LS_PPA_ESBC_HDR_SIZE, 512);
126 	ret = blk_dread(mmc_get_blk_desc(mmc), blk, cnt, ppa_hdr_ddr);
127 	if (ret != cnt) {
128 		free(ppa_hdr_ddr);
129 		printf("MMC/SD read of PPA header failed\n");
130 		return -EIO;
131 	}
132 	debug("Read PPA header to 0x%p\n", ppa_hdr_ddr);
133 
134 	ppa_esbc_hdr = (uintptr_t)ppa_hdr_ddr;
135 #endif
136 
137 	fw_length = fdt_totalsize(fitp);
138 	free(fitp);
139 
140 	fw_length = roundup(fw_length, 512);
141 	ppa_fit_addr = malloc(fw_length);
142 	if (!ppa_fit_addr) {
143 		printf("PPA: malloc failed for PPA image(size 0x%zx)\n",
144 		       fw_length);
145 		return -ENOMEM;
146 	}
147 
148 	blk = CONFIG_SYS_LS_PPA_FW_ADDR / 512;
149 	cnt = DIV_ROUND_UP(fw_length, 512);
150 	debug("%s: MMC read PPA FIT image: dev # %u, block # %u, count %u\n",
151 	      __func__, dev, blk, cnt);
152 	ret = blk_dread(mmc_get_blk_desc(mmc), blk, cnt, ppa_fit_addr);
153 	if (ret != cnt) {
154 		free(ppa_fit_addr);
155 		printf("MMC/SD read of PPA FIT header at offset 0x%x failed\n",
156 		       CONFIG_SYS_LS_PPA_FW_ADDR);
157 		return -EIO;
158 	}
159 
160 #elif defined(CONFIG_SYS_LS_PPA_FW_IN_NAND)
161 	struct fdt_header fit;
162 
163 	debug("%s: PPA image load from NAND\n", __func__);
164 
165 	nand_init();
166 	ret = nand_read(get_nand_dev_by_index(0),
167 			(loff_t)CONFIG_SYS_LS_PPA_FW_ADDR,
168 			&fdt_header_len, (u_char *)&fit);
169 	if (ret == -EUCLEAN) {
170 		printf("NAND read of PPA FIT header at offset 0x%x failed\n",
171 		       CONFIG_SYS_LS_PPA_FW_ADDR);
172 		return -EIO;
173 	}
174 
175 	ret = fdt_check_header(&fit);
176 	if (ret) {
177 		printf("%s: fdt_check_header() failed\n", __func__);
178 		return ret;
179 	}
180 
181 #ifdef CONFIG_CHAIN_OF_TRUST
182 	ppa_hdr_ddr = malloc(CONFIG_LS_PPA_ESBC_HDR_SIZE);
183 	if (!ppa_hdr_ddr) {
184 		printf("PPA: malloc failed for PPA header\n");
185 		return -ENOMEM;
186 	}
187 
188 	fw_length = CONFIG_LS_PPA_ESBC_HDR_SIZE;
189 
190 	ret = nand_read(get_nand_dev_by_index(0),
191 			(loff_t)CONFIG_SYS_LS_PPA_ESBC_ADDR,
192 			&fw_length, (u_char *)ppa_hdr_ddr);
193 	if (ret == -EUCLEAN) {
194 		free(ppa_hdr_ddr);
195 		printf("NAND read of PPA firmware at offset 0x%x failed\n",
196 		       CONFIG_SYS_LS_PPA_FW_ADDR);
197 		return -EIO;
198 	}
199 	debug("Read PPA header to 0x%p\n", ppa_hdr_ddr);
200 
201 	ppa_esbc_hdr = (uintptr_t)ppa_hdr_ddr;
202 #endif
203 
204 	fw_length = fdt_totalsize(&fit);
205 
206 	ppa_fit_addr = malloc(fw_length);
207 	if (!ppa_fit_addr) {
208 		printf("PPA: malloc failed for PPA image(size 0x%zx)\n",
209 		       fw_length);
210 		return -ENOMEM;
211 	}
212 
213 	ret = nand_read(get_nand_dev_by_index(0),
214 			(loff_t)CONFIG_SYS_LS_PPA_FW_ADDR,
215 			&fw_length, (u_char *)ppa_fit_addr);
216 	if (ret == -EUCLEAN) {
217 		free(ppa_fit_addr);
218 		printf("NAND read of PPA firmware at offset 0x%x failed\n",
219 		       CONFIG_SYS_LS_PPA_FW_ADDR);
220 		return -EIO;
221 	}
222 #else
223 #error "No CONFIG_SYS_LS_PPA_FW_IN_xxx defined"
224 #endif
225 
226 #endif
227 
228 #ifdef CONFIG_CHAIN_OF_TRUST
229 	ppa_img_addr = (uintptr_t)ppa_fit_addr;
230 	if (fsl_check_boot_mode_secure() != 0) {
231 		/*
232 		 * In case of failure in validation, fsl_secboot_validate
233 		 * would not return back in case of Production environment
234 		 * with ITS=1. In Development environment (ITS=0 and
235 		 * SB_EN=1), the function may return back in case of
236 		 * non-fatal failures.
237 		 */
238 		ret = fsl_secboot_validate(ppa_esbc_hdr,
239 					   PPA_KEY_HASH,
240 					   &ppa_img_addr);
241 		if (ret != 0)
242 			printf("SEC firmware(s) validation failed\n");
243 		else
244 			printf("SEC firmware(s) validation Successful\n");
245 	}
246 #if defined(CONFIG_SYS_LS_PPA_FW_IN_MMC) || \
247 	defined(CONFIG_SYS_LS_PPA_FW_IN_NAND)
248 	free(ppa_hdr_ddr);
249 #endif
250 #endif
251 
252 #ifdef CONFIG_FSL_LSCH3
253 	struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
254 	boot_loc_ptr_l = &gur->bootlocptrl;
255 	boot_loc_ptr_h = &gur->bootlocptrh;
256 
257 	/* Assign addresses to loadable ptrs */
258 	loadable_l = &gur->scratchrw[4];
259 	loadable_h = &gur->scratchrw[5];
260 #elif defined(CONFIG_FSL_LSCH2)
261 	struct ccsr_scfg __iomem *scfg = (void *)(CONFIG_SYS_FSL_SCFG_ADDR);
262 	boot_loc_ptr_l = &scfg->scratchrw[1];
263 	boot_loc_ptr_h = &scfg->scratchrw[0];
264 
265 	/* Assign addresses to loadable ptrs */
266 	loadable_l = &scfg->scratchrw[2];
267 	loadable_h = &scfg->scratchrw[3];
268 #endif
269 
270 	debug("fsl-ppa: boot_loc_ptr_l = 0x%p, boot_loc_ptr_h =0x%p\n",
271 	      boot_loc_ptr_l, boot_loc_ptr_h);
272 	ret = sec_firmware_init(ppa_fit_addr, boot_loc_ptr_l, boot_loc_ptr_h,
273 				loadable_l, loadable_h);
274 
275 #if defined(CONFIG_SYS_LS_PPA_FW_IN_MMC) || \
276 	defined(CONFIG_SYS_LS_PPA_FW_IN_NAND)
277 	free(ppa_fit_addr);
278 #endif
279 
280 	return ret;
281 }
282