--- /dev/null
+/*
+ * Copyright 2016 NXP Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <linux/kernel.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/types.h>
+#include <asm/macro.h>
+#include <asm/armv8/sec_firmware.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+extern void c_runtime_cpu_setup(void);
+
+#define SEC_FIRMWARE_LOADED 0x1
+#define SEC_FIRMWARE_RUNNING 0x2
+#define SEC_FIRMWARE_ADDR_MASK (~0x3)
+ /*
+ * Secure firmware load addr
+ * Flags used: 0x1 secure firmware has been loaded to secure memory
+ * 0x2 secure firmware is running
+ */
+ phys_addr_t sec_firmware_addr;
+
+static int sec_firmware_get_data(const void *sec_firmware_img,
+ const void **data, size_t *size)
+{
+ int conf_node_off, fw_node_off;
+ char *conf_node_name = NULL;
+ char *desc;
+ int ret;
+
+ conf_node_name = SEC_FIRMEWARE_FIT_CNF_NAME;
+
+ conf_node_off = fit_conf_get_node(sec_firmware_img, conf_node_name);
+ if (conf_node_off < 0) {
+ printf("SEC Firmware: %s: no such config\n", conf_node_name);
+ return -ENOENT;
+ }
+
+ fw_node_off = fit_conf_get_prop_node(sec_firmware_img, conf_node_off,
+ SEC_FIRMWARE_FIT_IMAGE);
+ if (fw_node_off < 0) {
+ printf("SEC Firmware: No '%s' in config\n",
+ SEC_FIRMWARE_FIT_IMAGE);
+ return -ENOLINK;
+ }
+
+ /* Verify secure firmware image */
+ if (!(fit_image_verify(sec_firmware_img, fw_node_off))) {
+ printf("SEC Firmware: Bad firmware image (bad CRC)\n");
+ return -EINVAL;
+ }
+
+ if (fit_image_get_data(sec_firmware_img, fw_node_off, data, size)) {
+ printf("SEC Firmware: Can't get %s subimage data/size",
+ SEC_FIRMWARE_FIT_IMAGE);
+ return -ENOENT;
+ }
+
+ ret = fit_get_desc(sec_firmware_img, fw_node_off, &desc);
+ if (ret)
+ printf("SEC Firmware: Can't get description\n");
+ else
+ printf("%s\n", desc);
+
+ return ret;
+}
+
+/*
+ * SEC Firmware FIT image parser checks if the image is in FIT
+ * format, verifies integrity of the image and calculates raw
+ * image address and size values.
+ *
+ * Returns 0 on success and a negative errno on error task fail.
+ */
+static int sec_firmware_parse_image(const void *sec_firmware_img,
+ const void **raw_image_addr,
+ size_t *raw_image_size)
+{
+ int ret;
+
+ ret = sec_firmware_get_data(sec_firmware_img, raw_image_addr,
+ raw_image_size);
+ if (ret)
+ return ret;
+
+ debug("SEC Firmware: raw_image_addr = 0x%p, raw_image_size = 0x%lx\n",
+ *raw_image_addr, *raw_image_size);
+
+ return 0;
+}
+
+static int sec_firmware_copy_image(const char *title,
+ u64 image_addr, u32 image_size, u64 sec_firmware)
+{
+ debug("%s copied to address 0x%p\n", title, (void *)sec_firmware);
+ memcpy((void *)sec_firmware, (void *)image_addr, image_size);
+ flush_dcache_range(sec_firmware, sec_firmware + image_size);
+
+ return 0;
+}
+
+/*
+ * This function will parse the SEC Firmware image, and then load it
+ * to secure memory.
+ */
+static int sec_firmware_load_image(const void *sec_firmware_img)
+{
+ const void *raw_image_addr;
+ size_t raw_image_size = 0;
+ int ret;
+
+ /*
+ * The Excetpion Level must be EL3 to load and initialize
+ * the SEC Firmware.
+ */
+ if (current_el() != 3) {
+ ret = -EACCES;
+ goto out;
+ }
+
+#ifdef CONFIG_SYS_MEM_RESERVE_SECURE
+ /*
+ * The SEC Firmware must be stored in secure memory.
+ * Append SEC Firmware to secure mmu table.
+ */
+ if (!(gd->arch.secure_ram & MEM_RESERVE_SECURE_MAINTAINED)) {
+ ret = -ENXIO;
+ goto out;
+ }
+
+ sec_firmware_addr = (gd->arch.secure_ram & MEM_RESERVE_SECURE_ADDR_MASK) +
+ gd->arch.tlb_size;
+#else
+#error "The CONFIG_SYS_MEM_RESERVE_SECURE must be defined when enabled SEC Firmware support"
+#endif
+
+ /* Align SEC Firmware base address to 4K */
+ sec_firmware_addr = (sec_firmware_addr + 0xfff) & ~0xfff;
+ debug("SEC Firmware: Load address: 0x%llx\n",
+ sec_firmware_addr & SEC_FIRMWARE_ADDR_MASK);
+
+ ret = sec_firmware_parse_image(sec_firmware_img, &raw_image_addr,
+ &raw_image_size);
+ if (ret)
+ goto out;
+
+ /* TODO:
+ * Check if the end addr of SEC Firmware has been extend the secure
+ * memory.
+ */
+
+ /* Copy the secure firmware to secure memory */
+ ret = sec_firmware_copy_image("SEC Firmware", (u64)raw_image_addr,
+ raw_image_size, sec_firmware_addr &
+ SEC_FIRMWARE_ADDR_MASK);
+ if (ret)
+ goto out;
+
+ sec_firmware_addr |= SEC_FIRMWARE_LOADED;
+ debug("SEC Firmware: Entry point: 0x%llx\n",
+ sec_firmware_addr & SEC_FIRMWARE_ADDR_MASK);
+
+ return 0;
+
+out:
+ printf("SEC Firmware: error (%d)\n", ret);
+ sec_firmware_addr = 0;
+
+ return ret;
+}
+
+static int sec_firmware_entry(u32 *eret_hold_l, u32 *eret_hold_h)
+{
+ const void *entry = (void *)(sec_firmware_addr &
+ SEC_FIRMWARE_ADDR_MASK);
+
+ return _sec_firmware_entry(entry, eret_hold_l, eret_hold_h);
+}
+
+/* Check the secure firmware FIT image */
+__weak bool sec_firmware_is_valid(const void *sec_firmware_img)
+{
+ if (fdt_check_header(sec_firmware_img)) {
+ printf("SEC Firmware: Bad firmware image (not a FIT image)\n");
+ return false;
+ }
+
+ if (!fit_check_format(sec_firmware_img)) {
+ printf("SEC Firmware: Bad firmware image (bad FIT header)\n");
+ return false;
+ }
+
+ return true;
+}
+
+#ifdef CONFIG_ARMV8_PSCI
+/*
+ * The PSCI_VERSION function is added from PSCI v0.2. When the PSCI
+ * v0.1 received this function, the NOT_SUPPORTED (0xffff_ffff) error
+ * number will be returned according to SMC Calling Conventions. But
+ * when getting the NOT_SUPPORTED error number, we cannot ensure if
+ * the PSCI version is v0.1 or other error occurred. So, PSCI v0.1
+ * won't be supported by this framework.
+ * And if the secure firmware isn't running, return NOT_SUPPORTED.
+ *
+ * The return value on success is PSCI version in format
+ * major[31:16]:minor[15:0].
+ */
+unsigned int sec_firmware_support_psci_version(void)
+{
+ if (sec_firmware_addr & SEC_FIRMWARE_RUNNING)
+ return _sec_firmware_support_psci_version();
+
+ return 0xffffffff;
+}
+#endif
+
+/*
+ * sec_firmware_init - Initialize the SEC Firmware
+ * @sec_firmware_img: the SEC Firmware image address
+ * @eret_hold_l: the address to hold exception return address low
+ * @eret_hold_h: the address to hold exception return address high
+ */
+int sec_firmware_init(const void *sec_firmware_img,
+ u32 *eret_hold_l,
+ u32 *eret_hold_h)
+{
+ int ret;
+
+ if (!sec_firmware_is_valid(sec_firmware_img))
+ return -EINVAL;
+
+ ret = sec_firmware_load_image(sec_firmware_img);
+ if (ret) {
+ printf("SEC Firmware: Failed to load image\n");
+ return ret;
+ } else if (sec_firmware_addr & SEC_FIRMWARE_LOADED) {
+ ret = sec_firmware_entry(eret_hold_l, eret_hold_h);
+ if (ret) {
+ printf("SEC Firmware: Failed to initialize\n");
+ return ret;
+ }
+ }
+
+ debug("SEC Firmware: Return from SEC Firmware: current_el = %d\n",
+ current_el());
+
+ /*
+ * The PE will be turned into target EL when returned from
+ * SEC Firmware.
+ */
+ if (current_el() != SEC_FIRMWARE_TARGET_EL)
+ return -EACCES;
+
+ sec_firmware_addr |= SEC_FIRMWARE_RUNNING;
+
+ /* Set exception table and enable caches if it isn't EL3 */
+ if (current_el() != 3) {
+ c_runtime_cpu_setup();
+ enable_caches();
+ }
+
+ return 0;
+}
projects / u-boot.git / commitdiff
