1 /*
2 * Copyright (c) 2022, Xilinx, Inc. All rights reserved.
3 * Copyright (C) 2022, Advanced Micro Devices, Inc. All rights reserved.
4 *
5 * SPDX-License-Identifier: BSD-3-Clause
6 */
7
8 #include <assert.h>
9
10 #include <common/debug.h>
11 #include <lib/mmio.h>
12 #include <lib/psci/psci.h>
13 #include <plat/arm/common/plat_arm.h>
14 #include <plat/common/platform.h>
15 #include <plat_arm.h>
16
17 #include <plat_private.h>
18 #include "pm_api_sys.h"
19 #include "pm_client.h"
20 #include <pm_common.h>
21 #include "pm_svc_main.h"
22 #include "versal_net_def.h"
23
24 static uintptr_t versal_net_sec_entry;
25
versal_net_pwr_domain_on(u_register_t mpidr)26 static int32_t versal_net_pwr_domain_on(u_register_t mpidr)
27 {
28 uint32_t cpu_id = plat_core_pos_by_mpidr(mpidr);
29 const struct pm_proc *proc;
30
31 VERBOSE("%s: mpidr: 0x%lx, cpuid: %x\n",
32 __func__, mpidr, cpu_id);
33
34 if (cpu_id == -1) {
35 return PSCI_E_INTERN_FAIL;
36 }
37
38 proc = pm_get_proc(cpu_id);
39 if (!proc) {
40 return PSCI_E_INTERN_FAIL;
41 }
42
43 pm_req_wakeup(proc->node_id, (versal_net_sec_entry & 0xFFFFFFFFU) | 0x1U,
44 versal_net_sec_entry >> 32, 0, 0);
45
46 /* Clear power down request */
47 pm_client_wakeup(proc);
48
49 return PSCI_E_SUCCESS;
50 }
51
52 /**
53 * versal_net_pwr_domain_off() - This function performs actions to turn off core
54 *
55 * @param target_state Targeted state
56 */
versal_net_pwr_domain_off(const psci_power_state_t * target_state)57 static void versal_net_pwr_domain_off(const psci_power_state_t *target_state)
58 {
59 uint32_t cpu_id = plat_my_core_pos();
60 const struct pm_proc *proc = pm_get_proc(cpu_id);
61
62 for (size_t i = 0; i <= PLAT_MAX_PWR_LVL; i++) {
63 VERBOSE("%s: target_state->pwr_domain_state[%lu]=%x\n",
64 __func__, i, target_state->pwr_domain_state[i]);
65 }
66
67 /* Prevent interrupts from spuriously waking up this cpu */
68 plat_versal_net_gic_cpuif_disable();
69
70 /*
71 * Send request to PMC to power down the appropriate APU CPU
72 * core.
73 * According to PSCI specification, CPU_off function does not
74 * have resume address and CPU core can only be woken up
75 * invoking CPU_on function, during which resume address will
76 * be set.
77 */
78 pm_self_suspend(proc->node_id, MAX_LATENCY, PM_STATE_CPU_IDLE, 0,
79 SECURE_FLAG);
80 }
81
82 /**
83 * versal_net_system_reset() - This function sends the reset request
84 * to firmware for the system to reset. This function does not return.
85 */
versal_net_system_reset(void)86 static void __dead2 versal_net_system_reset(void)
87 {
88 /* Send the system reset request to the PMC */
89 pm_system_shutdown(XPM_SHUTDOWN_TYPE_RESET,
90 pm_get_shutdown_scope(), SECURE_FLAG);
91
92 while (1) {
93 wfi();
94 }
95 }
96
97 /**
98 * versal_net_pwr_domain_suspend() - This function sends request to PMC to suspend
99 * core.
100 *
101 * @param target_state Targeted state
102 */
versal_net_pwr_domain_suspend(const psci_power_state_t * target_state)103 static void versal_net_pwr_domain_suspend(const psci_power_state_t *target_state)
104 {
105 uint32_t state;
106 uint32_t cpu_id = plat_my_core_pos();
107 const struct pm_proc *proc = pm_get_proc(cpu_id);
108
109 for (size_t i = 0; i <= PLAT_MAX_PWR_LVL; i++) {
110 VERBOSE("%s: target_state->pwr_domain_state[%lu]=%x\n",
111 __func__, i, target_state->pwr_domain_state[i]);
112 }
113
114 plat_versal_net_gic_cpuif_disable();
115
116 if (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) {
117 plat_versal_net_gic_save();
118 }
119
120 state = target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE ?
121 PM_STATE_SUSPEND_TO_RAM : PM_STATE_CPU_IDLE;
122
123 /* Send request to PMC to suspend this core */
124 pm_self_suspend(proc->node_id, MAX_LATENCY, state, versal_net_sec_entry,
125 SECURE_FLAG);
126
127 /* TODO: disable coherency */
128 }
129
versal_net_pwr_domain_on_finish(const psci_power_state_t * target_state)130 static void versal_net_pwr_domain_on_finish(const psci_power_state_t *target_state)
131 {
132 (void)target_state;
133
134 /* Enable the gic cpu interface */
135 plat_versal_net_gic_pcpu_init();
136
137 /* Program the gic per-cpu distributor or re-distributor interface */
138 plat_versal_net_gic_cpuif_enable();
139 }
140
141 /**
142 * versal_net_pwr_domain_suspend_finish() - This function performs actions to finish
143 * suspend procedure.
144 *
145 * @param target_state Targeted state
146 */
versal_net_pwr_domain_suspend_finish(const psci_power_state_t * target_state)147 static void versal_net_pwr_domain_suspend_finish(const psci_power_state_t *target_state)
148 {
149 uint32_t cpu_id = plat_my_core_pos();
150 const struct pm_proc *proc = pm_get_proc(cpu_id);
151
152 for (size_t i = 0; i <= PLAT_MAX_PWR_LVL; i++)
153 VERBOSE("%s: target_state->pwr_domain_state[%lu]=%x\n",
154 __func__, i, target_state->pwr_domain_state[i]);
155
156 /* Clear the APU power control register for this cpu */
157 pm_client_wakeup(proc);
158
159 /* TODO: enable coherency */
160
161 /* APU was turned off, so restore GIC context */
162 if (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) {
163 plat_versal_net_gic_resume();
164 }
165
166 plat_versal_net_gic_cpuif_enable();
167 }
168
169 /**
170 * versal_net_system_off() - This function sends the system off request
171 * to firmware. This function does not return.
172 */
versal_net_system_off(void)173 static void __dead2 versal_net_system_off(void)
174 {
175 /* Send the power down request to the PMC */
176 pm_system_shutdown(XPM_SHUTDOWN_TYPE_SHUTDOWN,
177 pm_get_shutdown_scope(), SECURE_FLAG);
178
179 while (1) {
180 wfi();
181 }
182 }
183
184 /**
185 * versal_net_validate_power_state() - This function ensures that the power state
186 * parameter in request is valid.
187 *
188 * @param power_state Power state of core
189 * @param req_state Requested state
190 *
191 * @return Returns status, either PSCI_E_SUCCESS or reason
192 */
versal_net_validate_power_state(unsigned int power_state,psci_power_state_t * req_state)193 static int32_t versal_net_validate_power_state(unsigned int power_state,
194 psci_power_state_t *req_state)
195 {
196 VERBOSE("%s: power_state: 0x%x\n", __func__, power_state);
197
198 int32_t pstate = psci_get_pstate_type(power_state);
199
200 assert(req_state);
201
202 /* Sanity check the requested state */
203 if (pstate == PSTATE_TYPE_STANDBY) {
204 req_state->pwr_domain_state[MPIDR_AFFLVL0] = PLAT_MAX_RET_STATE;
205 } else {
206 req_state->pwr_domain_state[MPIDR_AFFLVL0] = PLAT_MAX_OFF_STATE;
207 }
208
209 /* We expect the 'state id' to be zero */
210 if (psci_get_pstate_id(power_state)) {
211 return PSCI_E_INVALID_PARAMS;
212 }
213
214 return PSCI_E_SUCCESS;
215 }
216
217 /**
218 * versal_net_get_sys_suspend_power_state() - Get power state for system suspend
219 *
220 * @param req_state Requested state
221 */
versal_net_get_sys_suspend_power_state(psci_power_state_t * req_state)222 static void versal_net_get_sys_suspend_power_state(psci_power_state_t *req_state)
223 {
224 req_state->pwr_domain_state[PSCI_CPU_PWR_LVL] = PLAT_MAX_OFF_STATE;
225 req_state->pwr_domain_state[1] = PLAT_MAX_OFF_STATE;
226 }
227
228 static const struct plat_psci_ops versal_net_nopmc_psci_ops = {
229 .pwr_domain_on = versal_net_pwr_domain_on,
230 .pwr_domain_off = versal_net_pwr_domain_off,
231 .pwr_domain_on_finish = versal_net_pwr_domain_on_finish,
232 .pwr_domain_suspend = versal_net_pwr_domain_suspend,
233 .pwr_domain_suspend_finish = versal_net_pwr_domain_suspend_finish,
234 .system_off = versal_net_system_off,
235 .system_reset = versal_net_system_reset,
236 .validate_power_state = versal_net_validate_power_state,
237 .get_sys_suspend_power_state = versal_net_get_sys_suspend_power_state,
238 };
239
240 /*******************************************************************************
241 * Export the platform specific power ops.
242 ******************************************************************************/
plat_setup_psci_ops(uintptr_t sec_entrypoint,const struct plat_psci_ops ** psci_ops)243 int32_t plat_setup_psci_ops(uintptr_t sec_entrypoint,
244 const struct plat_psci_ops **psci_ops)
245 {
246 versal_net_sec_entry = sec_entrypoint;
247
248 VERBOSE("Setting up entry point %lx\n", versal_net_sec_entry);
249
250 *psci_ops = &versal_net_nopmc_psci_ops;
251
252 return 0;
253 }
254
sip_svc_setup_init(void)255 int32_t sip_svc_setup_init(void)
256 {
257 return pm_setup();
258 }
259
smc_handler(uint32_t smc_fid,uint64_t x1,uint64_t x2,uint64_t x3,uint64_t x4,void * cookie,void * handle,uint64_t flags)260 uint64_t smc_handler(uint32_t smc_fid, uint64_t x1, uint64_t x2, uint64_t x3, uint64_t x4,
261 void *cookie, void *handle, uint64_t flags)
262 {
263 return pm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, flags);
264 }
265