1 /*
2  * Copyright (c) 2018-2020, Arm Limited and Contributors. All rights reserved.
3  * Copyright (c) 2018-2022, Xilinx, Inc. All rights reserved.
4  * Copyright (c) 2022-2023, Advanced Micro Devices, Inc. All rights reserved.
5  *
6  * SPDX-License-Identifier: BSD-3-Clause
7  */
8 
9 #include <assert.h>
10 #include <errno.h>
11 
12 #include <bl31/bl31.h>
13 #include <common/bl_common.h>
14 #include <common/debug.h>
15 #include <lib/mmio.h>
16 #include <lib/xlat_tables/xlat_tables_v2.h>
17 #include <plat/common/platform.h>
18 #include <plat_arm.h>
19 #include <plat_console.h>
20 
21 #include <plat_fdt.h>
22 #include <plat_private.h>
23 #include <plat_startup.h>
24 #include <pm_api_sys.h>
25 #include <pm_client.h>
26 #include <pm_ipi.h>
27 #include <versal_net_def.h>
28 
29 static entry_point_info_t bl32_image_ep_info;
30 static entry_point_info_t bl33_image_ep_info;
31 
32 /*
33  * Return a pointer to the 'entry_point_info' structure of the next image for
34  * the security state specified. BL33 corresponds to the non-secure image type
35  * while BL32 corresponds to the secure image type. A NULL pointer is returned
36  * if the image does not exist.
37  */
bl31_plat_get_next_image_ep_info(uint32_t type)38 entry_point_info_t *bl31_plat_get_next_image_ep_info(uint32_t type)
39 {
40 	assert(sec_state_is_valid(type));
41 
42 	if (type == NON_SECURE) {
43 		return &bl33_image_ep_info;
44 	}
45 
46 	return &bl32_image_ep_info;
47 }
48 
49 /*
50  * Set the build time defaults,if we can't find any config data.
51  */
bl31_set_default_config(void)52 static inline void bl31_set_default_config(void)
53 {
54 	bl32_image_ep_info.pc = BL32_BASE;
55 	bl32_image_ep_info.spsr = arm_get_spsr_for_bl32_entry();
56 	bl33_image_ep_info.pc = plat_get_ns_image_entrypoint();
57 	bl33_image_ep_info.spsr = SPSR_64(MODE_EL2, MODE_SP_ELX,
58 					DISABLE_ALL_EXCEPTIONS);
59 }
60 
61 /*
62  * Perform any BL31 specific platform actions. Here is an opportunity to copy
63  * parameters passed by the calling EL (S-EL1 in BL2 & S-EL3 in BL1) before they
64  * are lost (potentially). This needs to be done before the MMU is initialized
65  * so that the memory layout can be used while creating page tables.
66  */
bl31_early_platform_setup2(u_register_t arg0,u_register_t arg1,u_register_t arg2,u_register_t arg3)67 void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
68 				u_register_t arg2, u_register_t arg3)
69 {
70 #if !(TFA_NO_PM)
71 	uint64_t tfa_handoff_addr, buff[HANDOFF_PARAMS_MAX_SIZE] = {0};
72 	uint32_t payload[PAYLOAD_ARG_CNT], max_size = HANDOFF_PARAMS_MAX_SIZE;
73 	enum pm_ret_status ret_status;
74 #endif /* !(TFA_NO_PM) */
75 
76 	board_detection();
77 
78 	switch (platform_id) {
79 	case VERSAL_NET_SPP:
80 		cpu_clock = 1000000;
81 		break;
82 	case VERSAL_NET_EMU:
83 		cpu_clock = 3660000;
84 		break;
85 	case VERSAL_NET_QEMU:
86 		/* Random values now */
87 		cpu_clock = 100000000;
88 		break;
89 	case VERSAL_NET_SILICON:
90 		cpu_clock = 100000000;
91 		break;
92 	default:
93 		panic();
94 	}
95 
96 	setup_console();
97 
98 	NOTICE("TF-A running on %s %d.%d\n", board_name_decode(),
99 	       platform_version / 10U, platform_version % 10U);
100 
101 	/* Initialize the platform config for future decision making */
102 	versal_net_config_setup();
103 
104 	/*
105 	 * Do initial security configuration to allow DRAM/device access. On
106 	 * Base VERSAL_NET only DRAM security is programmable (via TrustZone), but
107 	 * other platforms might have more programmable security devices
108 	 * present.
109 	 */
110 
111 	/* Populate common information for BL32 and BL33 */
112 	SET_PARAM_HEAD(&bl32_image_ep_info, PARAM_EP, VERSION_1, 0);
113 	SET_SECURITY_STATE(bl32_image_ep_info.h.attr, SECURE);
114 	SET_PARAM_HEAD(&bl33_image_ep_info, PARAM_EP, VERSION_1, 0);
115 	SET_SECURITY_STATE(bl33_image_ep_info.h.attr, NON_SECURE);
116 #if !(TFA_NO_PM)
117 	PM_PACK_PAYLOAD4(payload, LOADER_MODULE_ID, 1, PM_LOAD_GET_HANDOFF_PARAMS,
118 			 (uintptr_t)buff >> 32U, (uintptr_t)buff, max_size);
119 
120 	ret_status = pm_ipi_send_sync(primary_proc, payload, NULL, 0);
121 	if (ret_status == PM_RET_SUCCESS) {
122 		enum xbl_handoff xbl_ret;
123 
124 		tfa_handoff_addr = (uintptr_t)&buff;
125 
126 		xbl_ret = xbl_handover(&bl32_image_ep_info, &bl33_image_ep_info,
127 				       tfa_handoff_addr);
128 		if (xbl_ret != XBL_HANDOFF_SUCCESS) {
129 			ERROR("BL31: PLM to TF-A handover failed %u\n", xbl_ret);
130 			panic();
131 		}
132 
133 		INFO("BL31: PLM to TF-A handover success\n");
134 
135 		/*
136 		 * The BL32 load address is indicated as 0x0 in the handoff
137 		 * parameters, which is different from the default/user-provided
138 		 * load address of 0x60000000 but the flags are correctly
139 		 * configured. Consequently, in this scenario, set the PC
140 		 * to the requested BL32_BASE address.
141 		 */
142 
143 		/* TODO: Remove the following check once this is fixed from PLM */
144 		if (bl32_image_ep_info.pc == 0 && bl32_image_ep_info.spsr != 0) {
145 			bl32_image_ep_info.pc = (uintptr_t)BL32_BASE;
146 		}
147 	} else {
148 		INFO("BL31: setting up default configs\n");
149 
150 		bl31_set_default_config();
151 	}
152 #else
153 	bl31_set_default_config();
154 #endif /* !(TFA_NO_PM) */
155 
156 	NOTICE("BL31: Secure code at 0x%lx\n", bl32_image_ep_info.pc);
157 	NOTICE("BL31: Non secure code at 0x%lx\n", bl33_image_ep_info.pc);
158 }
159 
160 static versal_intr_info_type_el3_t type_el3_interrupt_table[MAX_INTR_EL3];
161 
request_intr_type_el3(uint32_t id,interrupt_type_handler_t handler)162 int request_intr_type_el3(uint32_t id, interrupt_type_handler_t handler)
163 {
164 	static uint32_t index;
165 	uint32_t i;
166 
167 	/* Validate 'handler' and 'id' parameters */
168 	if (handler == NULL || index >= MAX_INTR_EL3) {
169 		return -EINVAL;
170 	}
171 
172 	/* Check if a handler has already been registered */
173 	for (i = 0; i < index; i++) {
174 		if (id == type_el3_interrupt_table[i].id) {
175 			return -EALREADY;
176 		}
177 	}
178 
179 	type_el3_interrupt_table[index].id = id;
180 	type_el3_interrupt_table[index].handler = handler;
181 
182 	index++;
183 
184 	return 0;
185 }
186 
rdo_el3_interrupt_handler(uint32_t id,uint32_t flags,void * handle,void * cookie)187 static uint64_t rdo_el3_interrupt_handler(uint32_t id, uint32_t flags,
188 					  void *handle, void *cookie)
189 {
190 	uint32_t intr_id;
191 	uint32_t i;
192 	interrupt_type_handler_t handler = NULL;
193 
194 	intr_id = plat_ic_get_pending_interrupt_id();
195 
196 	for (i = 0; i < MAX_INTR_EL3; i++) {
197 		if (intr_id == type_el3_interrupt_table[i].id) {
198 			handler = type_el3_interrupt_table[i].handler;
199 		}
200 	}
201 
202 	if (handler != NULL) {
203 		handler(intr_id, flags, handle, cookie);
204 	}
205 
206 	return 0;
207 }
208 
bl31_platform_setup(void)209 void bl31_platform_setup(void)
210 {
211 	prepare_dtb();
212 
213 	/* Initialize the gic cpu and distributor interfaces */
214 	plat_versal_net_gic_driver_init();
215 	plat_versal_net_gic_init();
216 }
217 
bl31_plat_runtime_setup(void)218 void bl31_plat_runtime_setup(void)
219 {
220 	uint64_t flags = 0;
221 	int32_t rc;
222 
223 	set_interrupt_rm_flag(flags, NON_SECURE);
224 	rc = register_interrupt_type_handler(INTR_TYPE_EL3,
225 					     rdo_el3_interrupt_handler, flags);
226 	if (rc != 0) {
227 		panic();
228 	}
229 
230 	console_switch_state(CONSOLE_FLAG_RUNTIME);
231 }
232 
233 /*
234  * Perform the very early platform specific architectural setup here.
235  */
bl31_plat_arch_setup(void)236 void bl31_plat_arch_setup(void)
237 {
238 	const mmap_region_t bl_regions[] = {
239 #if (defined(XILINX_OF_BOARD_DTB_ADDR) && !IS_TFA_IN_OCM(BL31_BASE))
240 		MAP_REGION_FLAT(XILINX_OF_BOARD_DTB_ADDR, XILINX_OF_BOARD_DTB_MAX_SIZE,
241 				MT_MEMORY | MT_RW | MT_NS),
242 #endif
243 		MAP_REGION_FLAT(BL31_BASE, BL31_END - BL31_BASE,
244 			MT_MEMORY | MT_RW | MT_SECURE),
245 		MAP_REGION_FLAT(BL_CODE_BASE, BL_CODE_END - BL_CODE_BASE,
246 				MT_CODE | MT_SECURE),
247 		MAP_REGION_FLAT(BL_RO_DATA_BASE, BL_RO_DATA_END - BL_RO_DATA_BASE,
248 				MT_RO_DATA | MT_SECURE),
249 		{0}
250 	};
251 
252 	setup_page_tables(bl_regions, plat_get_mmap());
253 	enable_mmu(0);
254 }
255