1 /*
2 * Copyright (c) 2022-2024, Arm Limited. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7 #include <arch_helpers.h>
8 #include <common/debug.h>
9 #include <common/desc_image_load.h>
10 #include <drivers/arm/css/sds.h>
11 #include <libfdt.h>
12 #include <plat/common/platform.h>
13
14 #include "n1sdp_def.h"
15 #include <plat/arm/common/plat_arm.h>
16 #include <platform_def.h>
17
18 /*
19 * Platform information structure stored in SDS.
20 * This structure holds information about platform's DDR
21 * size which will be used to zero out the memory before
22 * enabling the ECC capability as well as information
23 * about multichip setup
24 * - multichip mode
25 * - secondary_count
26 * - Local DDR size in GB, DDR memory in master board
27 * - Remote DDR size in GB, DDR memory in secondary board
28 */
29 struct n1sdp_plat_info {
30 bool multichip_mode;
31 uint8_t secondary_count;
32 uint8_t local_ddr_size;
33 uint8_t remote_ddr_size;
34 } __packed;
35
36 /*******************************************************************************
37 * This function inserts Platform information via device tree nodes as,
38 * platform-info {
39 * multichip-mode = <0x0>;
40 * secondary-chip-count = <0x0>;
41 * local-ddr-size = <0x0>;
42 * remote-ddr-size = <0x0>;
43 * };
44 ******************************************************************************/
plat_n1sdp_append_config_node(struct n1sdp_plat_info * plat_info)45 static int plat_n1sdp_append_config_node(struct n1sdp_plat_info *plat_info)
46 {
47 bl_mem_params_node_t *mem_params;
48 void *fdt;
49 int nodeoffset, err;
50
51 mem_params = get_bl_mem_params_node(NT_FW_CONFIG_ID);
52 if (mem_params == NULL) {
53 ERROR("NT_FW CONFIG base address is NULL\n");
54 return -1;
55 }
56
57 fdt = (void *)(mem_params->image_info.image_base);
58
59 /* Check the validity of the fdt */
60 if (fdt_check_header(fdt) != 0) {
61 ERROR("Invalid NT_FW_CONFIG DTB passed\n");
62 return -1;
63 }
64
65 nodeoffset = fdt_subnode_offset(fdt, 0, "platform-info");
66 if (nodeoffset < 0) {
67 ERROR("NT_FW_CONFIG: Failed to get platform-info node offset\n");
68 return -1;
69 }
70
71 err = fdt_setprop_u32(fdt, nodeoffset, "multichip-mode",
72 plat_info->multichip_mode);
73 if (err < 0) {
74 ERROR("NT_FW_CONFIG: Failed to set multichip-mode\n");
75 return -1;
76 }
77
78 err = fdt_setprop_u32(fdt, nodeoffset, "secondary-chip-count",
79 plat_info->secondary_count);
80 if (err < 0) {
81 ERROR("NT_FW_CONFIG: Failed to set secondary-chip-count\n");
82 return -1;
83 }
84
85 err = fdt_setprop_u32(fdt, nodeoffset, "local-ddr-size",
86 plat_info->local_ddr_size);
87 if (err < 0) {
88 ERROR("NT_FW_CONFIG: Failed to set local-ddr-size\n");
89 return -1;
90 }
91
92 err = fdt_setprop_u32(fdt, nodeoffset, "remote-ddr-size",
93 plat_info->remote_ddr_size);
94 if (err < 0) {
95 ERROR("NT_FW_CONFIG: Failed to set remote-ddr-size\n");
96 return -1;
97 }
98
99 flush_dcache_range((uintptr_t)fdt, mem_params->image_info.image_size);
100
101 return 0;
102 }
103
104 /*******************************************************************************
105 * This function returns the list of executable images.
106 ******************************************************************************/
plat_get_next_bl_params(void)107 bl_params_t *plat_get_next_bl_params(void)
108 {
109 int ret;
110 struct n1sdp_plat_info plat_info;
111
112 ret = sds_init(SDS_SCP_AP_REGION_ID);
113 if (ret != SDS_OK) {
114 ERROR("SDS initialization failed. ret:%d\n", ret);
115 panic();
116 }
117
118 ret = sds_struct_read(SDS_SCP_AP_REGION_ID,
119 N1SDP_SDS_PLATFORM_INFO_STRUCT_ID,
120 N1SDP_SDS_PLATFORM_INFO_OFFSET,
121 &plat_info,
122 N1SDP_SDS_PLATFORM_INFO_SIZE,
123 SDS_ACCESS_MODE_NON_CACHED);
124 if (ret != SDS_OK) {
125 ERROR("Error getting platform info from SDS. ret:%d\n", ret);
126 panic();
127 }
128
129 /* Validate plat_info SDS */
130 if ((plat_info.local_ddr_size == 0U)
131 || (plat_info.local_ddr_size > N1SDP_MAX_DDR_CAPACITY_GB)
132 || (plat_info.remote_ddr_size > N1SDP_MAX_DDR_CAPACITY_GB)
133 || (plat_info.secondary_count > N1SDP_MAX_SECONDARY_COUNT)
134 ){
135 ERROR("platform info SDS is corrupted\n");
136 panic();
137 }
138
139 ret = plat_n1sdp_append_config_node(&plat_info);
140 if (ret != 0) {
141 panic();
142 }
143
144 return arm_get_next_bl_params();
145 }
146