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_SEC_FIRMWARE_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 (current_el() == SEC_FIRMWARE_TARGET_EL
)
228 return _sec_firmware_support_psci_version();
230 return PSCI_INVALID_VER
;
235 * Check with sec_firmware if it supports random number generation
238 * The return value will be true if it is supported
240 bool sec_firmware_support_hwrng(void)
243 if (sec_firmware_addr
& SEC_FIRMWARE_RUNNING
) {
244 if (!sec_firmware_get_random(rand
, 8))
252 * sec_firmware_get_random - Get a random number from SEC Firmware
253 * @rand: random number buffer to be filled
254 * @bytes: Number of bytes of random number to be supported
255 * @eret: -1 in case of error, 0 for success
257 int sec_firmware_get_random(uint8_t *rand
, int bytes
)
259 unsigned long long num
;
263 if (!bytes
|| bytes
> 8) {
264 printf("Max Random bytes genration supported is 8\n");
267 #define SIP_RNG_64 0xC200FF11
268 regs
.regs
[0] = SIP_RNG_64
;
274 regs
.regs
[1] = param1
;
282 memcpy(rand
, &num
, bytes
);
288 * sec_firmware_init - Initialize the SEC Firmware
289 * @sec_firmware_img: the SEC Firmware image address
290 * @eret_hold_l: the address to hold exception return address low
291 * @eret_hold_h: the address to hold exception return address high
293 int sec_firmware_init(const void *sec_firmware_img
,
299 if (!sec_firmware_is_valid(sec_firmware_img
))
302 ret
= sec_firmware_load_image(sec_firmware_img
);
304 printf("SEC Firmware: Failed to load image\n");
306 } else if (sec_firmware_addr
& SEC_FIRMWARE_LOADED
) {
307 ret
= sec_firmware_entry(eret_hold_l
, eret_hold_h
);
309 printf("SEC Firmware: Failed to initialize\n");
314 debug("SEC Firmware: Return from SEC Firmware: current_el = %d\n",
318 * The PE will be turned into target EL when returned from
321 if (current_el() != SEC_FIRMWARE_TARGET_EL
)
324 sec_firmware_addr
|= SEC_FIRMWARE_RUNNING
;
326 /* Set exception table and enable caches if it isn't EL3 */
327 if (current_el() != 3) {
328 c_runtime_cpu_setup();
336 * fdt_fix_kaslr - Add kalsr-seed node in Device tree
338 * @eret: 0 in case of error, 1 for success
340 int fdt_fixup_kaslr(void *fdt
)
346 #if defined(CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT)
347 /* Check if random seed generation is supported */
348 if (sec_firmware_support_hwrng() == false)
351 ret
= sec_firmware_get_random(rand
, 8);
353 printf("WARNING: No random number to set kaslr-seed\n");
357 err
= fdt_check_header(fdt
);
359 printf("fdt_chosen: %s\n", fdt_strerror(err
));
363 /* find or create "/chosen" node. */
364 nodeoffset
= fdt_find_or_add_subnode(fdt
, 0, "chosen");
368 err
= fdt_setprop(fdt
, nodeoffset
, "kaslr-seed", rand
,
371 printf("WARNING: can't set kaslr-seed %s.\n",