2 * Copyright 2016 NXP Semiconductor, Inc.
4 * SPDX-License-Identifier: GPL-2.0+
9 #include <linux/kernel.h>
11 #include <asm/system.h>
12 #include <asm/types.h>
13 #include <asm/macro.h>
14 #include <asm/armv8/sec_firmware.h>
16 DECLARE_GLOBAL_DATA_PTR;
17 extern void c_runtime_cpu_setup(void);
19 #define SEC_FIRMWARE_LOADED 0x1
20 #define SEC_FIRMWARE_RUNNING 0x2
21 #define SEC_FIRMWARE_ADDR_MASK (~0x3)
23 * Secure firmware load addr
24 * Flags used: 0x1 secure firmware has been loaded to secure memory
25 * 0x2 secure firmware is running
27 phys_addr_t sec_firmware_addr;
29 #ifndef SEC_FIRMWARE_FIT_IMAGE
30 #define SEC_FIRMWARE_FIT_IMAGE "firmware"
32 #ifndef SEC_FIRMEWARE_FIT_CNF_NAME
33 #define SEC_FIRMEWARE_FIT_CNF_NAME "config@1"
35 #ifndef SEC_FIRMWARE_TARGET_EL
36 #define SEC_FIRMWARE_TARGET_EL 2
39 static int sec_firmware_get_data(const void *sec_firmware_img,
40 const void **data, size_t *size)
42 int conf_node_off, fw_node_off;
43 char *conf_node_name = NULL;
47 conf_node_name = SEC_FIRMEWARE_FIT_CNF_NAME;
49 conf_node_off = fit_conf_get_node(sec_firmware_img, conf_node_name);
50 if (conf_node_off < 0) {
51 printf("SEC Firmware: %s: no such config\n", conf_node_name);
55 fw_node_off = fit_conf_get_prop_node(sec_firmware_img, conf_node_off,
56 SEC_FIRMWARE_FIT_IMAGE);
57 if (fw_node_off < 0) {
58 printf("SEC Firmware: No '%s' in config\n",
59 SEC_FIRMWARE_FIT_IMAGE);
63 /* Verify secure firmware image */
64 if (!(fit_image_verify(sec_firmware_img, fw_node_off))) {
65 printf("SEC Firmware: Bad firmware image (bad CRC)\n");
69 if (fit_image_get_data(sec_firmware_img, fw_node_off, data, size)) {
70 printf("SEC Firmware: Can't get %s subimage data/size",
71 SEC_FIRMWARE_FIT_IMAGE);
75 ret = fit_get_desc(sec_firmware_img, fw_node_off, &desc);
77 printf("SEC Firmware: Can't get description\n");
85 * SEC Firmware FIT image parser checks if the image is in FIT
86 * format, verifies integrity of the image and calculates raw
87 * image address and size values.
89 * Returns 0 on success and a negative errno on error task fail.
91 static int sec_firmware_parse_image(const void *sec_firmware_img,
92 const void **raw_image_addr,
93 size_t *raw_image_size)
97 ret = sec_firmware_get_data(sec_firmware_img, raw_image_addr,
102 debug("SEC Firmware: raw_image_addr = 0x%p, raw_image_size = 0x%lx\n",
103 *raw_image_addr, *raw_image_size);
108 static int sec_firmware_copy_image(const char *title,
109 u64 image_addr, u32 image_size, u64 sec_firmware)
111 debug("%s copied to address 0x%p\n", title, (void *)sec_firmware);
112 memcpy((void *)sec_firmware, (void *)image_addr, image_size);
113 flush_dcache_range(sec_firmware, sec_firmware + image_size);
119 * This function will parse the SEC Firmware image, and then load it
122 static int sec_firmware_load_image(const void *sec_firmware_img)
124 const void *raw_image_addr;
125 size_t raw_image_size = 0;
129 * The Excetpion Level must be EL3 to load and initialize
132 if (current_el() != 3) {
137 #ifdef CONFIG_SYS_MEM_RESERVE_SECURE
139 * The SEC Firmware must be stored in secure memory.
140 * Append SEC Firmware to secure mmu table.
142 if (!(gd->arch.secure_ram & MEM_RESERVE_SECURE_MAINTAINED)) {
147 sec_firmware_addr = (gd->arch.secure_ram & MEM_RESERVE_SECURE_ADDR_MASK) +
150 #error "The CONFIG_SYS_MEM_RESERVE_SECURE must be defined when enabled SEC Firmware support"
153 /* Align SEC Firmware base address to 4K */
154 sec_firmware_addr = (sec_firmware_addr + 0xfff) & ~0xfff;
155 debug("SEC Firmware: Load address: 0x%llx\n",
156 sec_firmware_addr & SEC_FIRMWARE_ADDR_MASK);
158 ret = sec_firmware_parse_image(sec_firmware_img, &raw_image_addr,
164 * Check if the end addr of SEC Firmware has been extend the secure
168 /* Copy the secure firmware to secure memory */
169 ret = sec_firmware_copy_image("SEC Firmware", (u64)raw_image_addr,
170 raw_image_size, sec_firmware_addr &
171 SEC_FIRMWARE_ADDR_MASK);
175 sec_firmware_addr |= SEC_FIRMWARE_LOADED;
176 debug("SEC Firmware: Entry point: 0x%llx\n",
177 sec_firmware_addr & SEC_FIRMWARE_ADDR_MASK);
182 printf("SEC Firmware: error (%d)\n", ret);
183 sec_firmware_addr = 0;
188 static int sec_firmware_entry(u32 *eret_hold_l, u32 *eret_hold_h)
190 const void *entry = (void *)(sec_firmware_addr &
191 SEC_FIRMWARE_ADDR_MASK);
193 return _sec_firmware_entry(entry, eret_hold_l, eret_hold_h);
196 /* Check the secure firmware FIT image */
197 __weak bool sec_firmware_is_valid(const void *sec_firmware_img)
199 if (fdt_check_header(sec_firmware_img)) {
200 printf("SEC Firmware: Bad firmware image (not a FIT image)\n");
204 if (!fit_check_format(sec_firmware_img)) {
205 printf("SEC Firmware: Bad firmware image (bad FIT header)\n");
212 #ifdef CONFIG_FSL_PPA_ARMV8_PSCI
214 * The PSCI_VERSION function is added from PSCI v0.2. When the PSCI
215 * v0.1 received this function, the NOT_SUPPORTED (0xffff_ffff) error
216 * number will be returned according to SMC Calling Conventions. But
217 * when getting the NOT_SUPPORTED error number, we cannot ensure if
218 * the PSCI version is v0.1 or other error occurred. So, PSCI v0.1
219 * won't be supported by this framework.
220 * And if the secure firmware isn't running, return NOT_SUPPORTED.
222 * The return value on success is PSCI version in format
223 * major[31:16]:minor[15:0].
225 unsigned int sec_firmware_support_psci_version(void)
227 if (sec_firmware_addr & SEC_FIRMWARE_RUNNING)
228 return _sec_firmware_support_psci_version();
235 * sec_firmware_init - Initialize the SEC Firmware
236 * @sec_firmware_img: the SEC Firmware image address
237 * @eret_hold_l: the address to hold exception return address low
238 * @eret_hold_h: the address to hold exception return address high
240 int sec_firmware_init(const void *sec_firmware_img,
246 if (!sec_firmware_is_valid(sec_firmware_img))
249 ret = sec_firmware_load_image(sec_firmware_img);
251 printf("SEC Firmware: Failed to load image\n");
253 } else if (sec_firmware_addr & SEC_FIRMWARE_LOADED) {
254 ret = sec_firmware_entry(eret_hold_l, eret_hold_h);
256 printf("SEC Firmware: Failed to initialize\n");
261 debug("SEC Firmware: Return from SEC Firmware: current_el = %d\n",
265 * The PE will be turned into target EL when returned from
268 if (current_el() != SEC_FIRMWARE_TARGET_EL)
271 sec_firmware_addr |= SEC_FIRMWARE_RUNNING;
273 /* Set exception table and enable caches if it isn't EL3 */
274 if (current_el() != 3) {
275 c_runtime_cpu_setup();