Jay Buddhabhatti | c6daff0 | 2022-09-05 02:56:32 -0700 | [diff] [blame] | 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 | /* |
| 9 | * APU specific definition of processors in the subsystem as well as functions |
| 10 | * for getting information about and changing state of the APU. |
| 11 | */ |
| 12 | |
| 13 | #include <assert.h> |
| 14 | |
| 15 | #include <drivers/arm/gic_common.h> |
| 16 | #include <drivers/arm/gicv3.h> |
| 17 | #include <lib/bakery_lock.h> |
| 18 | #include <lib/mmio.h> |
| 19 | #include <lib/mmio.h> |
| 20 | #include <lib/utils.h> |
| 21 | #include <plat/common/platform.h> |
| 22 | |
| 23 | #include <plat_ipi.h> |
| 24 | #include <platform_def.h> |
| 25 | #include "pm_api_sys.h" |
| 26 | #include "pm_client.h" |
| 27 | #include <versal_net_def.h> |
| 28 | |
| 29 | #define UNDEFINED_CPUID (~0) |
| 30 | |
| 31 | DEFINE_RENAME_SYSREG_RW_FUNCS(cpu_pwrctrl_val, S3_0_C15_C2_7) |
| 32 | DEFINE_BAKERY_LOCK(pm_client_secure_lock); |
| 33 | |
| 34 | static const struct pm_ipi apu_ipi = { |
| 35 | .local_ipi_id = IPI_ID_APU, |
| 36 | .remote_ipi_id = IPI_ID_PMC, |
| 37 | .buffer_base = IPI_BUFFER_APU_BASE, |
| 38 | }; |
| 39 | |
| 40 | /* Order in pm_procs_all array must match cpu ids */ |
| 41 | static const struct pm_proc pm_procs_all[] = { |
| 42 | { |
| 43 | .node_id = PM_DEV_CLUSTER0_ACPU_0, |
| 44 | .ipi = &apu_ipi, |
| 45 | .pwrdn_mask = 0, |
| 46 | }, |
| 47 | { |
| 48 | .node_id = PM_DEV_CLUSTER0_ACPU_1, |
| 49 | .ipi = &apu_ipi, |
| 50 | .pwrdn_mask = 0, |
| 51 | }, |
| 52 | { |
| 53 | .node_id = PM_DEV_CLUSTER0_ACPU_2, |
| 54 | .ipi = &apu_ipi, |
| 55 | .pwrdn_mask = 0, |
| 56 | }, |
| 57 | { |
| 58 | .node_id = PM_DEV_CLUSTER0_ACPU_3, |
| 59 | .ipi = &apu_ipi, |
| 60 | .pwrdn_mask = 0, |
| 61 | }, |
| 62 | { |
| 63 | .node_id = PM_DEV_CLUSTER1_ACPU_0, |
| 64 | .ipi = &apu_ipi, |
| 65 | .pwrdn_mask = 0, |
| 66 | }, |
| 67 | { |
| 68 | .node_id = PM_DEV_CLUSTER1_ACPU_1, |
| 69 | .ipi = &apu_ipi, |
| 70 | .pwrdn_mask = 0, |
| 71 | }, |
| 72 | { |
| 73 | .node_id = PM_DEV_CLUSTER1_ACPU_2, |
| 74 | .ipi = &apu_ipi, |
| 75 | .pwrdn_mask = 0, |
| 76 | }, |
| 77 | { |
| 78 | .node_id = PM_DEV_CLUSTER1_ACPU_3, |
| 79 | .ipi = &apu_ipi, |
| 80 | .pwrdn_mask = 0, |
| 81 | }, |
| 82 | { |
| 83 | .node_id = PM_DEV_CLUSTER2_ACPU_0, |
| 84 | .ipi = &apu_ipi, |
| 85 | .pwrdn_mask = 0, |
| 86 | }, |
| 87 | { |
| 88 | .node_id = PM_DEV_CLUSTER2_ACPU_1, |
| 89 | .ipi = &apu_ipi, |
| 90 | .pwrdn_mask = 0, |
| 91 | }, |
| 92 | { |
| 93 | .node_id = PM_DEV_CLUSTER2_ACPU_2, |
| 94 | .ipi = &apu_ipi, |
| 95 | .pwrdn_mask = 0, |
| 96 | }, |
| 97 | { |
| 98 | .node_id = PM_DEV_CLUSTER2_ACPU_3, |
| 99 | .ipi = &apu_ipi, |
| 100 | .pwrdn_mask = 0, |
| 101 | }, |
| 102 | { |
| 103 | .node_id = PM_DEV_CLUSTER3_ACPU_0, |
| 104 | .ipi = &apu_ipi, |
| 105 | .pwrdn_mask = 0, |
| 106 | }, |
| 107 | { |
| 108 | .node_id = PM_DEV_CLUSTER3_ACPU_1, |
| 109 | .ipi = &apu_ipi, |
| 110 | .pwrdn_mask = 0, |
| 111 | }, |
| 112 | { |
| 113 | .node_id = PM_DEV_CLUSTER3_ACPU_2, |
| 114 | .ipi = &apu_ipi, |
| 115 | .pwrdn_mask = 0, |
| 116 | }, |
| 117 | { |
| 118 | .node_id = PM_DEV_CLUSTER3_ACPU_3, |
| 119 | .ipi = &apu_ipi, |
| 120 | .pwrdn_mask = 0, |
| 121 | } |
| 122 | }; |
| 123 | |
| 124 | const struct pm_proc *primary_proc = &pm_procs_all[0]; |
| 125 | |
| 126 | /** |
| 127 | * pm_get_proc() - returns pointer to the proc structure |
| 128 | * @param cpuid id of the cpu whose proc struct pointer should be returned |
| 129 | * |
| 130 | * @return pointer to a proc structure if proc is found, otherwise NULL |
| 131 | */ |
| 132 | const struct pm_proc *pm_get_proc(uint32_t cpuid) |
| 133 | { |
| 134 | if (cpuid < ARRAY_SIZE(pm_procs_all)) { |
| 135 | return &pm_procs_all[cpuid]; |
| 136 | } |
| 137 | |
| 138 | NOTICE("ERROR: cpuid: %d proc NULL\n", cpuid); |
| 139 | return NULL; |
| 140 | } |
| 141 | |
| 142 | /** |
| 143 | * pm_client_suspend() - Client-specific suspend actions |
| 144 | * |
| 145 | * This function should contain any PU-specific actions |
| 146 | * required prior to sending suspend request to PMU |
| 147 | * Actions taken depend on the state system is suspending to. |
| 148 | * |
| 149 | * @param proc processor which need to suspend |
| 150 | * @param state desired suspend state |
| 151 | */ |
| 152 | void pm_client_suspend(const struct pm_proc *proc, uint32_t state) |
| 153 | { |
| 154 | uint32_t cpu_id = plat_my_core_pos(); |
| 155 | uintptr_t val; |
| 156 | |
| 157 | bakery_lock_get(&pm_client_secure_lock); |
| 158 | |
| 159 | /* TODO: Set wakeup source */ |
| 160 | |
| 161 | val = read_cpu_pwrctrl_val(); |
| 162 | val |= CORE_PWRDN_EN_BIT_MASK; |
| 163 | write_cpu_pwrctrl_val(val); |
| 164 | |
| 165 | isb(); |
| 166 | |
| 167 | mmio_write_32(APU_PCIL_CORE_X_IEN_POWER_REG(cpu_id), |
| 168 | APU_PCIL_CORE_X_IEN_POWER_MASK); |
| 169 | |
| 170 | bakery_lock_release(&pm_client_secure_lock); |
| 171 | } |
| 172 | |
| 173 | /** |
| 174 | * pm_get_cpuid() - get the local cpu ID for a global node ID |
| 175 | * @param nid node id of the processor |
| 176 | * |
| 177 | * @return the cpu ID (starting from 0) for the subsystem |
| 178 | */ |
| 179 | static uint32_t pm_get_cpuid(uint32_t nid) |
| 180 | { |
| 181 | for (size_t i = 0; i < ARRAY_SIZE(pm_procs_all); i++) { |
| 182 | if (pm_procs_all[i].node_id == nid) { |
| 183 | return i; |
| 184 | } |
| 185 | } |
| 186 | return UNDEFINED_CPUID; |
| 187 | } |
| 188 | |
| 189 | /** |
| 190 | * pm_client_wakeup() - Client-specific wakeup actions |
| 191 | * |
| 192 | * This function should contain any PU-specific actions |
| 193 | * required for waking up another APU core |
| 194 | * |
| 195 | * @param proc Processor which need to wakeup |
| 196 | */ |
| 197 | void pm_client_wakeup(const struct pm_proc *proc) |
| 198 | { |
| 199 | uint32_t cpuid = pm_get_cpuid(proc->node_id); |
| 200 | |
| 201 | if (cpuid == UNDEFINED_CPUID) { |
| 202 | return; |
| 203 | } |
| 204 | |
| 205 | bakery_lock_get(&pm_client_secure_lock); |
| 206 | |
| 207 | /* TODO: clear powerdown bit for affected cpu */ |
| 208 | |
| 209 | bakery_lock_release(&pm_client_secure_lock); |
| 210 | } |
| 211 | |
| 212 | /** |
| 213 | * pm_client_abort_suspend() - Client-specific abort-suspend actions |
| 214 | * |
| 215 | * This function should contain any PU-specific actions |
| 216 | * required for aborting a prior suspend request |
| 217 | */ |
| 218 | void pm_client_abort_suspend(void) |
| 219 | { |
| 220 | uint32_t cpu_id = plat_my_core_pos(); |
| 221 | uintptr_t val; |
| 222 | |
| 223 | /* Enable interrupts at processor level (for current cpu) */ |
| 224 | gicv3_cpuif_enable(plat_my_core_pos()); |
| 225 | |
| 226 | bakery_lock_get(&pm_client_secure_lock); |
| 227 | |
| 228 | /* Clear powerdown request */ |
| 229 | val = read_cpu_pwrctrl_val(); |
| 230 | val &= ~CORE_PWRDN_EN_BIT_MASK; |
| 231 | write_cpu_pwrctrl_val(val); |
| 232 | |
| 233 | isb(); |
| 234 | |
| 235 | /* Disabled power down interrupt */ |
| 236 | mmio_write_32(APU_PCIL_CORE_X_IDS_POWER_REG(cpu_id), |
| 237 | APU_PCIL_CORE_X_IDS_POWER_MASK); |
| 238 | |
| 239 | bakery_lock_release(&pm_client_secure_lock); |
| 240 | } |