1 /*
2  * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
3  *
4  * SPDX-License-Identifier: BSD-3-Clause
5  */
6 
7 #include <common/bl_common.h>
8 #include <common/debug.h>
9 #include <drivers/arm/css/css_scp.h>
10 #include <plat/arm/common/plat_arm.h>
11 #include <plat/common/platform.h>
12 
13 /* Weak definition may be overridden in specific CSS based platform */
14 #pragma weak bl2u_plat_handle_scp_bl2u
15 
16 /* Data structure which holds the SCP_BL2U image info for BL2U */
17 static image_info_t scp_bl2u_image_info;
18 
19 /*******************************************************************************
20  * BL1 can pass platform dependent information to BL2U in x1.
21  * In case of ARM CSS platforms x1 contains SCP_BL2U image info.
22  * In case of ARM FVP platforms x1 is not used.
23  * In both cases, x0 contains the extents of the memory available to BL2U
24  ******************************************************************************/
bl2u_early_platform_setup(meminfo_t * mem_layout,void * plat_info)25 void bl2u_early_platform_setup(meminfo_t *mem_layout, void *plat_info)
26 {
27 	if (!plat_info)
28 		panic();
29 
30 	arm_bl2u_early_platform_setup(mem_layout, plat_info);
31 
32 	scp_bl2u_image_info = *(image_info_t *)plat_info;
33 }
34 
35 /*******************************************************************************
36  * Transfer SCP_BL2U from Trusted RAM using the SCP Download protocol.
37  ******************************************************************************/
bl2u_plat_handle_scp_bl2u(void)38 int bl2u_plat_handle_scp_bl2u(void)
39 {
40 	int ret;
41 
42 	INFO("BL2U: Initiating SCP_BL2U transfer to SCP\n");
43 
44 	ret = css_scp_boot_image_xfer((void *)scp_bl2u_image_info.image_base,
45 		scp_bl2u_image_info.image_size);
46 
47 	if (ret == 0)
48 		ret = css_scp_boot_ready();
49 
50 	if (ret == 0)
51 		INFO("BL2U: SCP_BL2U transferred to SCP\n");
52 	else
53 		ERROR("BL2U: SCP_BL2U transfer failure\n");
54 
55 	return ret;
56 }
57