예제 #1
0
void plat_arm_pwrc_setup(void)
{
	mhu_secure_init();
}
int css_scp_boot_image_xfer(void *image, unsigned int image_size)
{
	uint32_t response;
	uint32_t checksum;
	cmd_info_payload_t *cmd_info_payload;
	cmd_data_payload_t *cmd_data_payload;

	assert((uintptr_t) image == SCP_BL2_BASE);

	if ((image_size == 0) || (image_size % 4 != 0)) {
		ERROR("Invalid size for the SCP_BL2 image. Must be a multiple of "
			"4 bytes and not zero (current size = 0x%x)\n",
			image_size);
		return -1;
	}

	/* Extract the checksum from the image */
	checksum = *(uint32_t *) image;
	image = (char *) image + sizeof(checksum);
	image_size -= sizeof(checksum);

	mhu_secure_init();

	VERBOSE("Send info about the SCP_BL2 image to be transferred to SCP\n");

	/*
	 * Send information about the SCP firmware image about to be transferred
	 * to SCP
	 */
	scp_boot_message_start();

	BOM_CMD_HEADER->id = BOOT_CMD_INFO;
	cmd_info_payload = BOM_CMD_PAYLOAD;
	cmd_info_payload->image_size = image_size;
	cmd_info_payload->checksum = checksum;

	scp_boot_message_send(sizeof(*cmd_info_payload));
#if CSS_DETECT_PRE_1_7_0_SCP
	{
		const uint32_t deprecated_scp_nack_cmd = 0x404;
		uint32_t mhu_status;

		VERBOSE("Detecting SCP version incompatibility\n");

		mhu_status = mhu_secure_message_wait();
		if (mhu_status == deprecated_scp_nack_cmd) {
			ERROR("Detected an incompatible version of the SCP firmware.\n");
			ERROR("Only versions from v1.7.0 onwards are supported.\n");
			ERROR("Please update the SCP firmware.\n");
			return -1;
		}

		VERBOSE("SCP version looks OK\n");
	}
#endif /* CSS_DETECT_PRE_1_7_0_SCP */
	response = scp_boot_message_wait(sizeof(response));
	scp_boot_message_end();

	if (response != 0) {
		ERROR("SCP BOOT_CMD_INFO returned error %u\n", response);
		return -1;
	}

	VERBOSE("Transferring SCP_BL2 image to SCP\n");

	/* Transfer SCP_BL2 image to SCP */
	scp_boot_message_start();

	BOM_CMD_HEADER->id = BOOT_CMD_DATA;
	cmd_data_payload = BOM_CMD_PAYLOAD;
	cmd_data_payload->offset = (uintptr_t) image - ARM_TRUSTED_SRAM_BASE;
	cmd_data_payload->block_size = image_size;

	scp_boot_message_send(sizeof(*cmd_data_payload));
	response = scp_boot_message_wait(sizeof(response));
	scp_boot_message_end();

	if (response != 0) {
		ERROR("SCP BOOT_CMD_DATA returned error %u\n", response);
		return -1;
	}

	return 0;
}