3 * Common security related functions for OMAP devices
5 * (C) Copyright 2016-2017
6 * Texas Instruments, <www.ti.com>
8 * Daniel Allred <d-allred@ti.com>
9 * Andreas Dannenberg <dannenberg@ti.com>
10 * Harinarayan Bhatta <harinarayan@ti.com>
11 * Andrew F. Davis <afd@ti.com>
13 * SPDX-License-Identifier: GPL-2.0+
19 #include <asm/arch/sys_proto.h>
20 #include <asm/cache.h>
21 #include <asm/omap_common.h>
22 #include <asm/omap_sec_common.h>
24 #include <asm/ti-common/sys_proto.h>
27 #include <tee/optee.h>
29 /* Index for signature verify ROM API */
31 #define API_HAL_KM_VERIFYCERTIFICATESIGNATURE_INDEX (0x0000000C)
33 #define API_HAL_KM_VERIFYCERTIFICATESIGNATURE_INDEX (0x0000000E)
36 /* Index for signature PPA-based TI HAL APIs */
37 #define PPA_HAL_SERVICES_START_INDEX (0x200)
38 #define PPA_SERV_HAL_TEE_LOAD_MASTER (PPA_HAL_SERVICES_START_INDEX + 23)
39 #define PPA_SERV_HAL_TEE_LOAD_SLAVE (PPA_HAL_SERVICES_START_INDEX + 24)
40 #define PPA_SERV_HAL_SETUP_SEC_RESVD_REGION (PPA_HAL_SERVICES_START_INDEX + 25)
41 #define PPA_SERV_HAL_SETUP_EMIF_FW_REGION (PPA_HAL_SERVICES_START_INDEX + 26)
42 #define PPA_SERV_HAL_LOCK_EMIF_FW (PPA_HAL_SERVICES_START_INDEX + 27)
44 /* Offset of header size if image is signed as ISW */
45 #define HEADER_SIZE_OFFSET (0x6D)
49 /* Argument for PPA_SERV_HAL_TEE_LOAD_MASTER */
50 struct ppa_tee_load_info {
51 u32 tee_sec_mem_start; /* Physical start address reserved for TEE */
52 u32 tee_sec_mem_size; /* Size of the memory reserved for TEE */
53 u32 tee_cert_start; /* Address where signed TEE binary is loaded */
54 u32 tee_cert_size; /* Size of TEE certificate (signed binary) */
55 u32 tee_jump_addr; /* Address to jump to start TEE execution */
56 u32 tee_arg0; /* argument to TEE jump function, in r0 */
59 static uint32_t secure_rom_call_args[5] __aligned(ARCH_DMA_MINALIGN) __section(".data");
61 u32 secure_rom_call(u32 service, u32 proc_id, u32 flag, ...)
69 num_args = va_arg(ap, u32);
76 /* Copy args to aligned args structure */
77 for (i = 0; i < num_args; i++)
78 secure_rom_call_args[i + 1] = va_arg(ap, u32);
80 secure_rom_call_args[0] = num_args;
84 /* if data cache is enabled, flush the aligned args structure */
86 (unsigned int)&secure_rom_call_args[0],
87 (unsigned int)&secure_rom_call_args[0] +
88 roundup(sizeof(secure_rom_call_args), ARCH_DMA_MINALIGN));
90 return omap_smc_sec(service, proc_id, flag, secure_rom_call_args);
93 static u32 find_sig_start(char *image, size_t size)
95 char *image_end = image + size;
96 char *sig_start_magic = "CERT_";
97 int magic_str_len = strlen(sig_start_magic);
100 while (--image_end > image) {
101 if (*image_end == '_') {
102 ch = image_end - magic_str_len + 1;
103 if (!strncmp(ch, sig_start_magic, magic_str_len))
110 int secure_boot_verify_image(void **image, size_t *size)
113 u32 cert_addr, sig_addr;
116 /* Perform cache writeback on input buffer */
118 rounddown((u32)*image, ARCH_DMA_MINALIGN),
119 roundup((u32)*image + *size, ARCH_DMA_MINALIGN));
121 cert_addr = (uint32_t)*image;
122 sig_addr = find_sig_start((char *)*image, *size);
125 printf("No signature found in image!\n");
130 *size = sig_addr - cert_addr; /* Subtract out the signature size */
131 /* Subtract header if present */
132 if (strncmp((char *)sig_addr, "CERT_ISW_", 9) == 0)
133 *size -= ((u32 *)*image)[HEADER_SIZE_OFFSET];
136 /* Check if image load address is 32-bit aligned */
137 if (!IS_ALIGNED(cert_addr, 4)) {
138 printf("Image is not 4-byte aligned!\n");
143 /* Image size also should be multiple of 4 */
144 if (!IS_ALIGNED(cert_size, 4)) {
145 printf("Image size is not 4-byte aligned!\n");
150 /* Call ROM HAL API to verify certificate signature */
151 debug("%s: load_addr = %x, size = %x, sig_addr = %x\n", __func__,
152 cert_addr, cert_size, sig_addr);
154 result = secure_rom_call(
155 API_HAL_KM_VERIFYCERTIFICATESIGNATURE_INDEX, 0, 0,
156 4, cert_addr, cert_size, sig_addr, 0xFFFFFFFF);
158 /* Perform cache writeback on output buffer */
160 rounddown((u32)*image, ARCH_DMA_MINALIGN),
161 roundup((u32)*image + *size, ARCH_DMA_MINALIGN));
165 printf("Authentication failed!\n");
166 printf("Return Value = %08X\n", result);
171 * Output notification of successful authentication to re-assure the
172 * user that the secure code is being processed as expected. However
173 * suppress any such log output in case of building for SPL and booting
174 * via YMODEM. This is done to avoid disturbing the YMODEM serial
175 * protocol transactions.
177 if (!(IS_ENABLED(CONFIG_SPL_BUILD) &&
178 IS_ENABLED(CONFIG_SPL_YMODEM_SUPPORT) &&
179 spl_boot_device() == BOOT_DEVICE_UART))
180 printf("Authentication passed\n");
185 u32 get_sec_mem_start(void)
187 u32 sec_mem_start = CONFIG_TI_SECURE_EMIF_REGION_START;
188 u32 sec_mem_size = CONFIG_TI_SECURE_EMIF_TOTAL_REGION_SIZE;
190 * Total reserved region is all contiguous with protected
191 * region coming first, followed by the non-secure region.
192 * If 0x0 start address is given, we simply put the reserved
193 * region at the end of the external DRAM.
195 if (sec_mem_start == 0)
197 (CONFIG_SYS_SDRAM_BASE + (
198 #if defined(CONFIG_OMAP54XX)
201 get_ram_size((void *)CONFIG_SYS_SDRAM_BASE,
202 CONFIG_MAX_RAM_BANK_SIZE)
205 return sec_mem_start;
208 int secure_emif_firewall_setup(uint8_t region_num, uint32_t start_addr,
209 uint32_t size, uint32_t access_perm,
210 uint32_t initiator_perm)
215 * Call PPA HAL API to do any other general firewall
216 * configuration for regions 1-6 of the EMIF firewall.
218 debug("%s: regionNum = %x, startAddr = %x, size = %x", __func__,
219 region_num, start_addr, size);
221 result = secure_rom_call(
222 PPA_SERV_HAL_SETUP_EMIF_FW_REGION, 0, 0, 4,
223 (start_addr & 0xFFFFFFF0) | (region_num & 0x0F),
224 size, access_perm, initiator_perm);
227 puts("Secure EMIF Firewall Setup failed!\n");
228 debug("Return Value = %x\n", result);
234 #if (CONFIG_TI_SECURE_EMIF_TOTAL_REGION_SIZE < \
235 CONFIG_TI_SECURE_EMIF_PROTECTED_REGION_SIZE)
236 #error "TI Secure EMIF: Protected size cannot be larger than total size."
238 int secure_emif_reserve(void)
241 u32 sec_mem_start = get_sec_mem_start();
242 u32 sec_prot_size = CONFIG_TI_SECURE_EMIF_PROTECTED_REGION_SIZE;
244 /* If there is no protected region, there is no reservation to make */
245 if (sec_prot_size == 0)
249 * Call PPA HAL API to reserve a chunk of EMIF SDRAM
250 * for secure world use. This region should be carved out
251 * from use by any public code. EMIF firewall region 7
252 * will be used to protect this block of memory.
254 result = secure_rom_call(
255 PPA_SERV_HAL_SETUP_SEC_RESVD_REGION,
256 0, 0, 2, sec_mem_start, sec_prot_size);
259 puts("SDRAM Firewall: Secure memory reservation failed!\n");
260 debug("Return Value = %x\n", result);
266 int secure_emif_firewall_lock(void)
271 * Call PPA HAL API to lock the EMIF firewall configurations.
272 * After this API is called, none of the PPA HAL APIs for
273 * configuring the EMIF firewalls will be usable again (that
274 * is, calls to those APIs will return failure and have no
278 result = secure_rom_call(
279 PPA_SERV_HAL_LOCK_EMIF_FW,
283 puts("Secure EMIF Firewall Lock failed!\n");
284 debug("Return Value = %x\n", result);
290 static struct ppa_tee_load_info tee_info __aligned(ARCH_DMA_MINALIGN);
292 int secure_tee_install(u32 addr)
294 struct optee_header *hdr;
297 u32 sec_mem_start = get_sec_mem_start();
298 const u32 size = CONFIG_TI_SECURE_EMIF_PROTECTED_REGION_SIZE;
301 /* If there is no protected region, there is no place to put the TEE */
303 printf("Error loading TEE, no protected memory region available\n");
307 hdr = (struct optee_header *)map_sysmem(addr, sizeof(struct optee_header));
308 /* 280 bytes = size of signature */
309 tee_file_size = hdr->init_size + hdr->paged_size +
310 sizeof(struct optee_header) + 280;
312 if ((hdr->magic != OPTEE_MAGIC) ||
313 (hdr->version != OPTEE_VERSION) ||
314 (tee_file_size > size)) {
315 printf("Error in TEE header. Check firewall and TEE sizes\n");
317 return CMD_RET_FAILURE;
320 tee_info.tee_sec_mem_start = sec_mem_start;
321 tee_info.tee_sec_mem_size = size;
322 tee_info.tee_jump_addr = hdr->init_load_addr_lo;
323 tee_info.tee_cert_start = addr;
324 tee_info.tee_cert_size = tee_file_size;
325 tee_info.tee_arg0 = hdr->init_size + tee_info.tee_jump_addr;
327 loadptr = map_sysmem(addr, tee_file_size);
329 debug("tee_info.tee_sec_mem_start= %08X\n", tee_info.tee_sec_mem_start);
330 debug("tee_info.tee_sec_mem_size = %08X\n", tee_info.tee_sec_mem_size);
331 debug("tee_info.tee_jump_addr = %08X\n", tee_info.tee_jump_addr);
332 debug("tee_info.tee_cert_start = %08X\n", tee_info.tee_cert_start);
333 debug("tee_info.tee_cert_size = %08X\n", tee_info.tee_cert_size);
334 debug("tee_info.tee_arg0 = %08X\n", tee_info.tee_arg0);
335 debug("tee_file_size = %d\n", tee_file_size);
337 #if !defined(CONFIG_SYS_DCACHE_OFF)
339 rounddown((u32)loadptr, ARCH_DMA_MINALIGN),
340 roundup((u32)loadptr + tee_file_size, ARCH_DMA_MINALIGN));
342 flush_dcache_range((u32)&tee_info, (u32)&tee_info +
343 roundup(sizeof(tee_info), ARCH_DMA_MINALIGN));
345 unmap_sysmem(loadptr);
347 ret = secure_rom_call(PPA_SERV_HAL_TEE_LOAD_MASTER, 0, 0, 1, &tee_info);
349 printf("TEE_LOAD_MASTER Failed\n");
352 printf("TEE_LOAD_MASTER Done\n");
354 #if defined(CONFIG_OMAP54XX)
356 u32 *smc_cpu1_params;
357 /* Reuse the tee_info buffer for SMC params */
358 smc_cpu1_params = (u32 *)&tee_info;
359 smc_cpu1_params[0] = 0;
360 #if !defined(CONFIG_SYS_DCACHE_OFF)
361 flush_dcache_range((u32)smc_cpu1_params, (u32)smc_cpu1_params +
362 roundup(sizeof(u32), ARCH_DMA_MINALIGN));
364 ret = omap_smc_sec_cpu1(PPA_SERV_HAL_TEE_LOAD_SLAVE, 0, 0,
367 printf("TEE_LOAD_SLAVE Failed\n");
370 printf("TEE_LOAD_SLAVE Done\n");