Add submodule dependency filesHEADmaster

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec

1 files changed, 381 insertions, 0 deletions

diff --git a/roms/u-boot/arch/arm/mach-omap2/sec-common.c b/roms/u-boot/arch/arm/mach-omap2/sec-common.c
new file mode 100644
index 000000000..0551bc125
--- /dev/null
+++ b/roms/u-boot/arch/arm/mach-omap2/sec-common.c
@@ -0,0 +1,381 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *
+ * Common security related functions for OMAP devices
+ *
+ * (C) Copyright 2016-2017
+ * Texas Instruments, <www.ti.com>
+ *
+ * Daniel Allred <d-allred@ti.com>
+ * Andreas Dannenberg <dannenberg@ti.com>
+ * Harinarayan Bhatta <harinarayan@ti.com>
+ * Andrew F. Davis <afd@ti.com>
+ */
+
+#include <common.h>
+#include <command.h>
+#include <cpu_func.h>
+#include <hang.h>
+#include <init.h>
+#include <log.h>
+#include <stdarg.h>
+
+#include <asm/arch/sys_proto.h>
+#include <asm/cache.h>
+#include <asm/omap_common.h>
+#include <asm/omap_sec_common.h>
+#include <asm/spl.h>
+#include <asm/ti-common/sys_proto.h>
+#include <mapmem.h>
+#include <spl.h>
+#include <tee/optee.h>
+
+/* Index for signature verify ROM API */
+#ifdef CONFIG_AM33XX
+#define API_HAL_KM_VERIFYCERTIFICATESIGNATURE_INDEX	(0x0000000C)
+#else
+#define API_HAL_KM_VERIFYCERTIFICATESIGNATURE_INDEX	(0x0000000E)
+#endif
+
+/* Index for signature PPA-based TI HAL APIs */
+#define PPA_HAL_SERVICES_START_INDEX        (0x200)
+#define PPA_SERV_HAL_TEE_LOAD_MASTER        (PPA_HAL_SERVICES_START_INDEX + 23)
+#define PPA_SERV_HAL_TEE_LOAD_SLAVE         (PPA_HAL_SERVICES_START_INDEX + 24)
+#define PPA_SERV_HAL_SETUP_SEC_RESVD_REGION (PPA_HAL_SERVICES_START_INDEX + 25)
+#define PPA_SERV_HAL_SETUP_EMIF_FW_REGION   (PPA_HAL_SERVICES_START_INDEX + 26)
+#define PPA_SERV_HAL_LOCK_EMIF_FW           (PPA_HAL_SERVICES_START_INDEX + 27)
+
+/* Offset of header size if image is signed as ISW */
+#define HEADER_SIZE_OFFSET	(0x6D)
+
+int tee_loaded = 0;
+
+/* Argument for PPA_SERV_HAL_TEE_LOAD_MASTER */
+struct ppa_tee_load_info {
+	u32 tee_sec_mem_start; /* Physical start address reserved for TEE */
+	u32 tee_sec_mem_size;  /* Size of the memory reserved for TEE */
+	u32 tee_cert_start;    /* Address where signed TEE binary is loaded */
+	u32 tee_cert_size;     /* Size of TEE certificate (signed binary) */
+	u32 tee_jump_addr;     /* Address to jump to start TEE execution */
+	u32 tee_arg0;          /* argument to TEE jump function, in r0 */
+};
+
+static uint32_t secure_rom_call_args[5] __aligned(ARCH_DMA_MINALIGN) __section(".data");
+
+u32 secure_rom_call(u32 service, u32 proc_id, u32 flag, ...)
+{
+	int i;
+	u32 num_args;
+	va_list ap;
+
+	va_start(ap, flag);
+
+	num_args = va_arg(ap, u32);
+
+	if (num_args > 4) {
+		va_end(ap);
+		return 1;
+	}
+
+	/* Copy args to aligned args structure */
+	for (i = 0; i < num_args; i++)
+		secure_rom_call_args[i + 1] = va_arg(ap, u32);
+
+	secure_rom_call_args[0] = num_args;
+
+	va_end(ap);
+
+	/* if data cache is enabled, flush the aligned args structure */
+	flush_dcache_range(
+		(unsigned int)&secure_rom_call_args[0],
+		(unsigned int)&secure_rom_call_args[0] +
+		roundup(sizeof(secure_rom_call_args), ARCH_DMA_MINALIGN));
+
+	return omap_smc_sec(service, proc_id, flag, secure_rom_call_args);
+}
+
+static u32 find_sig_start(char *image, size_t size)
+{
+	char *image_end = image + size;
+	char *sig_start_magic = "CERT_";
+	int magic_str_len = strlen(sig_start_magic);
+	char *ch;
+
+	while (--image_end > image) {
+		if (*image_end == '_') {
+			ch = image_end - magic_str_len + 1;
+			if (!strncmp(ch, sig_start_magic, magic_str_len))
+				return (u32)ch;
+		}
+	}
+	return 0;
+}
+
+int secure_boot_verify_image(void **image, size_t *size)
+{
+	int result = 1;
+	u32 cert_addr, sig_addr;
+	size_t cert_size;
+
+	/* Perform cache writeback on input buffer */
+	flush_dcache_range(
+		rounddown((u32)*image, ARCH_DMA_MINALIGN),
+		roundup((u32)*image + *size, ARCH_DMA_MINALIGN));
+
+	cert_addr = (uint32_t)*image;
+	sig_addr = find_sig_start((char *)*image, *size);
+
+	if (sig_addr == 0) {
+		printf("No signature found in image!\n");
+		result = 1;
+		goto auth_exit;
+	}
+
+	*size = sig_addr - cert_addr;	/* Subtract out the signature size */
+	/* Subtract header if present */
+	if (strncmp((char *)sig_addr, "CERT_ISW_", 9) == 0)
+		*size -= ((u32 *)*image)[HEADER_SIZE_OFFSET];
+	cert_size = *size;
+
+	/* Check if image load address is 32-bit aligned */
+	if (!IS_ALIGNED(cert_addr, 4)) {
+		printf("Image is not 4-byte aligned!\n");
+		result = 1;
+		goto auth_exit;
+	}
+
+	/* Image size also should be multiple of 4 */
+	if (!IS_ALIGNED(cert_size, 4)) {
+		printf("Image size is not 4-byte aligned!\n");
+		result = 1;
+		goto auth_exit;
+	}
+
+	/* Call ROM HAL API to verify certificate signature */
+	debug("%s: load_addr = %x, size = %x, sig_addr = %x\n", __func__,
+	      cert_addr, cert_size, sig_addr);
+
+	result = secure_rom_call(
+		API_HAL_KM_VERIFYCERTIFICATESIGNATURE_INDEX, 0, 0,
+		4, cert_addr, cert_size, sig_addr, 0xFFFFFFFF);
+
+	/* Perform cache writeback on output buffer */
+	flush_dcache_range(
+		rounddown((u32)*image, ARCH_DMA_MINALIGN),
+		roundup((u32)*image + *size, ARCH_DMA_MINALIGN));
+
+auth_exit:
+	if (result != 0) {
+		printf("Authentication failed!\n");
+		printf("Return Value = %08X\n", result);
+		hang();
+	}
+
+	/*
+	 * Output notification of successful authentication to re-assure the
+	 * user that the secure code is being processed as expected. However
+	 * suppress any such log output in case of building for SPL and booting
+	 * via YMODEM. This is done to avoid disturbing the YMODEM serial
+	 * protocol transactions.
+	 */
+	if (!(IS_ENABLED(CONFIG_SPL_BUILD) &&
+	      IS_ENABLED(CONFIG_SPL_YMODEM_SUPPORT) &&
+	      spl_boot_device() == BOOT_DEVICE_UART))
+		printf("Authentication passed\n");
+
+	return result;
+}
+
+u32 get_sec_mem_start(void)
+{
+	u32 sec_mem_start = CONFIG_TI_SECURE_EMIF_REGION_START;
+	u32 sec_mem_size = CONFIG_TI_SECURE_EMIF_TOTAL_REGION_SIZE;
+	/*
+	 * Total reserved region is all contiguous with protected
+	 * region coming first, followed by the non-secure region.
+	 * If 0x0 start address is given, we simply put the reserved
+	 * region at the end of the external DRAM.
+	 */
+	if (sec_mem_start == 0)
+		sec_mem_start =
+			(CONFIG_SYS_SDRAM_BASE + (
+#if defined(CONFIG_OMAP54XX)
+			omap_sdram_size()
+#else
+			get_ram_size((void *)CONFIG_SYS_SDRAM_BASE,
+				     CONFIG_MAX_RAM_BANK_SIZE)
+#endif
+			- sec_mem_size));
+	return sec_mem_start;
+}
+
+int secure_emif_firewall_setup(uint8_t region_num, uint32_t start_addr,
+			       uint32_t size, uint32_t access_perm,
+			       uint32_t initiator_perm)
+{
+	int result = 1;
+
+	/*
+	 * Call PPA HAL API to do any other general firewall
+	 * configuration for regions 1-6 of the EMIF firewall.
+	 */
+	debug("%s: regionNum = %x, startAddr = %x, size = %x", __func__,
+	      region_num, start_addr, size);
+
+	result = secure_rom_call(
+			PPA_SERV_HAL_SETUP_EMIF_FW_REGION, 0, 0, 4,
+			(start_addr & 0xFFFFFFF0) | (region_num & 0x0F),
+			size, access_perm, initiator_perm);
+
+	if (result != 0) {
+		puts("Secure EMIF Firewall Setup failed!\n");
+		debug("Return Value = %x\n", result);
+	}
+
+	return result;
+}
+
+#if	(CONFIG_TI_SECURE_EMIF_TOTAL_REGION_SIZE <  \
+	CONFIG_TI_SECURE_EMIF_PROTECTED_REGION_SIZE)
+#error	"TI Secure EMIF: Protected size cannot be larger than total size."
+#endif
+int secure_emif_reserve(void)
+{
+	int result = 1;
+	u32 sec_mem_start = get_sec_mem_start();
+	u32 sec_prot_size = CONFIG_TI_SECURE_EMIF_PROTECTED_REGION_SIZE;
+
+	/* If there is no protected region, there is no reservation to make */
+	if (sec_prot_size == 0)
+		return 0;
+
+	/*
+	 * Call PPA HAL API to reserve a chunk of EMIF SDRAM
+	 * for secure world use. This region should be carved out
+	 * from use by any public code. EMIF firewall region 7
+	 * will be used to protect this block of memory.
+	 */
+	result = secure_rom_call(
+			PPA_SERV_HAL_SETUP_SEC_RESVD_REGION,
+			0, 0, 2, sec_mem_start, sec_prot_size);
+
+	if (result != 0) {
+		puts("SDRAM Firewall: Secure memory reservation failed!\n");
+		debug("Return Value = %x\n", result);
+	}
+
+	return result;
+}
+
+int secure_emif_firewall_lock(void)
+{
+	int result = 1;
+
+	/*
+	 * Call PPA HAL API to lock the EMIF firewall configurations.
+	 * After this API is called, none of the PPA HAL APIs for
+	 * configuring the EMIF firewalls will be usable again (that
+	 * is, calls to those APIs will return failure and have no
+	 * effect).
+	 */
+
+	result = secure_rom_call(
+			PPA_SERV_HAL_LOCK_EMIF_FW,
+			0, 0, 0);
+
+	if (result != 0) {
+		puts("Secure EMIF Firewall Lock failed!\n");
+		debug("Return Value = %x\n", result);
+	}
+
+	return result;
+}
+
+static struct ppa_tee_load_info tee_info __aligned(ARCH_DMA_MINALIGN);
+
+int secure_tee_install(u32 addr)
+{
+	struct optee_header *hdr;
+	void *loadptr;
+	u32 tee_file_size;
+	u32 sec_mem_start = get_sec_mem_start();
+	const u32 size = CONFIG_TI_SECURE_EMIF_PROTECTED_REGION_SIZE;
+	u32 ret;
+
+	/* If there is no protected region, there is no place to put the TEE */
+	if (size == 0) {
+		printf("Error loading TEE, no protected memory region available\n");
+		return -ENOBUFS;
+	}
+
+	hdr = (struct optee_header *)map_sysmem(addr, sizeof(struct optee_header));
+	/* 280 bytes = size of signature */
+	tee_file_size = hdr->init_size + hdr->paged_size +
+			sizeof(struct optee_header) + 280;
+
+	if ((hdr->magic != OPTEE_MAGIC) ||
+	    (hdr->version != OPTEE_VERSION) ||
+	    (tee_file_size > size)) {
+		printf("Error in TEE header. Check firewall and TEE sizes\n");
+		unmap_sysmem(hdr);
+		return CMD_RET_FAILURE;
+	}
+
+	tee_info.tee_sec_mem_start = sec_mem_start;
+	tee_info.tee_sec_mem_size = size;
+	tee_info.tee_jump_addr = hdr->init_load_addr_lo;
+	tee_info.tee_cert_start = addr;
+	tee_info.tee_cert_size = tee_file_size;
+	tee_info.tee_arg0 = hdr->init_size + tee_info.tee_jump_addr;
+	unmap_sysmem(hdr);
+	loadptr = map_sysmem(addr, tee_file_size);
+
+	debug("tee_info.tee_sec_mem_start= %08X\n", tee_info.tee_sec_mem_start);
+	debug("tee_info.tee_sec_mem_size = %08X\n", tee_info.tee_sec_mem_size);
+	debug("tee_info.tee_jump_addr = %08X\n", tee_info.tee_jump_addr);
+	debug("tee_info.tee_cert_start = %08X\n", tee_info.tee_cert_start);
+	debug("tee_info.tee_cert_size = %08X\n", tee_info.tee_cert_size);
+	debug("tee_info.tee_arg0 = %08X\n", tee_info.tee_arg0);
+	debug("tee_file_size = %d\n", tee_file_size);
+
+#if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
+	flush_dcache_range(
+		rounddown((u32)loadptr, ARCH_DMA_MINALIGN),
+		roundup((u32)loadptr + tee_file_size, ARCH_DMA_MINALIGN));
+
+	flush_dcache_range((u32)&tee_info, (u32)&tee_info +
+			roundup(sizeof(tee_info), ARCH_DMA_MINALIGN));
+#endif
+	unmap_sysmem(loadptr);
+
+	ret = secure_rom_call(PPA_SERV_HAL_TEE_LOAD_MASTER, 0, 0, 1, &tee_info);
+	if (ret) {
+		printf("TEE_LOAD_MASTER Failed\n");
+		return ret;
+	}
+	printf("TEE_LOAD_MASTER Done\n");
+
+#if defined(CONFIG_OMAP54XX)
+	if (!is_dra72x()) {
+		u32 *smc_cpu1_params;
+		/* Reuse the tee_info buffer for SMC params */
+		smc_cpu1_params = (u32 *)&tee_info;
+		smc_cpu1_params[0] = 0;
+#if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
+		flush_dcache_range((u32)smc_cpu1_params, (u32)smc_cpu1_params +
+				roundup(sizeof(u32), ARCH_DMA_MINALIGN));
+#endif
+		ret = omap_smc_sec_cpu1(PPA_SERV_HAL_TEE_LOAD_SLAVE, 0, 0,
+				smc_cpu1_params);
+		if (ret) {
+			printf("TEE_LOAD_SLAVE Failed\n");
+			return ret;
+		}
+		printf("TEE_LOAD_SLAVE Done\n");
+	}
+#endif
+
+	tee_loaded = 1;
+
+	return 0;
+}