Yatharth Kochar | 9518d02 | 2016-03-11 14:20:19 +0000 | [diff] [blame] | 1 | /* |
Joel Hutton | 5cc3bc8 | 2018-03-21 11:40:57 +0000 | [diff] [blame] | 2 | * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved. |
Yatharth Kochar | 9518d02 | 2016-03-11 14:20:19 +0000 | [diff] [blame] | 3 | * |
dp-arm | fa3cf0b | 2017-05-03 09:38:09 +0100 | [diff] [blame] | 4 | * SPDX-License-Identifier: BSD-3-Clause |
Yatharth Kochar | 9518d02 | 2016-03-11 14:20:19 +0000 | [diff] [blame] | 5 | */ |
| 6 | #include <arch.h> |
| 7 | #include <arch_helpers.h> |
| 8 | #include <assert.h> |
| 9 | #include <debug.h> |
| 10 | #include <errno.h> |
| 11 | #include <platform.h> |
| 12 | #include <pmf.h> |
| 13 | #include <string.h> |
Joel Hutton | 5cc3bc8 | 2018-03-21 11:40:57 +0000 | [diff] [blame] | 14 | #include <utils_def.h> |
Yatharth Kochar | 9518d02 | 2016-03-11 14:20:19 +0000 | [diff] [blame] | 15 | |
| 16 | /******************************************************************************* |
| 17 | * The 'pmf_svc_descs' array holds the PMF service descriptors exported by |
| 18 | * services by placing them in the 'pmf_svc_descs' linker section. |
| 19 | * The 'pmf_svc_descs_indices' array holds the index of a descriptor in the |
| 20 | * 'pmf_svc_descs' array. The TIF[15:10] bits in the time-stamp id are used |
| 21 | * to get an index into the 'pmf_svc_descs_indices' array. This gives the |
| 22 | * index of the descriptor in the 'pmf_svc_descs' array which contains the |
| 23 | * service function pointers. |
| 24 | ******************************************************************************/ |
Joel Hutton | 5cc3bc8 | 2018-03-21 11:40:57 +0000 | [diff] [blame] | 25 | |
| 26 | IMPORT_SYM(uintptr_t, __PMF_SVC_DESCS_START__, PMF_SVC_DESCS_START); |
| 27 | IMPORT_SYM(uintptr_t, __PMF_SVC_DESCS_END__, PMF_SVC_DESCS_END); |
Soby Mathew | 4e28c20 | 2018-10-14 08:09:22 +0100 | [diff] [blame] | 28 | IMPORT_SYM(uintptr_t, __PMF_PERCPU_TIMESTAMP_END__, PMF_PERCPU_TIMESTAMP_END); |
Antonio Nino Diaz | bf170be | 2018-10-25 17:38:23 +0100 | [diff] [blame] | 29 | IMPORT_SYM(uintptr_t, __PMF_TIMESTAMP_START__, PMF_TIMESTAMP_ARRAY_START); |
Soby Mathew | 4e28c20 | 2018-10-14 08:09:22 +0100 | [diff] [blame] | 30 | |
| 31 | #define PMF_PERCPU_TIMESTAMP_SIZE (PMF_PERCPU_TIMESTAMP_END - PMF_TIMESTAMP_ARRAY_START) |
Yatharth Kochar | 9518d02 | 2016-03-11 14:20:19 +0000 | [diff] [blame] | 32 | |
| 33 | #define PMF_SVC_DESCS_MAX 10 |
| 34 | |
| 35 | /* |
| 36 | * This is used to traverse through registered PMF services. |
| 37 | */ |
| 38 | static pmf_svc_desc_t *pmf_svc_descs; |
| 39 | |
| 40 | /* |
| 41 | * This array is used to store registered PMF services in sorted order. |
| 42 | */ |
| 43 | static int pmf_svc_descs_indices[PMF_SVC_DESCS_MAX]; |
| 44 | |
| 45 | /* |
| 46 | * This is used to track total number of successfully registered PMF services. |
| 47 | */ |
| 48 | static int pmf_num_services; |
| 49 | |
| 50 | /* |
| 51 | * This is the main PMF function that initialize registered |
| 52 | * PMF services and also sort them in ascending order. |
| 53 | */ |
| 54 | int pmf_setup(void) |
| 55 | { |
| 56 | int rc, ii, jj = 0; |
| 57 | int pmf_svc_descs_num, temp_val; |
| 58 | |
| 59 | /* If no PMF services are registered then simply bail out */ |
| 60 | pmf_svc_descs_num = (PMF_SVC_DESCS_END - PMF_SVC_DESCS_START)/ |
| 61 | sizeof(pmf_svc_desc_t); |
| 62 | if (pmf_svc_descs_num == 0) |
| 63 | return 0; |
| 64 | |
| 65 | assert(pmf_svc_descs_num < PMF_SVC_DESCS_MAX); |
| 66 | |
| 67 | pmf_svc_descs = (pmf_svc_desc_t *) PMF_SVC_DESCS_START; |
| 68 | for (ii = 0; ii < pmf_svc_descs_num; ii++) { |
| 69 | |
Antonio Nino Diaz | bf170be | 2018-10-25 17:38:23 +0100 | [diff] [blame] | 70 | assert(pmf_svc_descs[ii].get_ts != NULL); |
Yatharth Kochar | 9518d02 | 2016-03-11 14:20:19 +0000 | [diff] [blame] | 71 | |
| 72 | /* |
| 73 | * Call the initialization routine for this |
| 74 | * PMF service, if it is defined. |
| 75 | */ |
Antonio Nino Diaz | bf170be | 2018-10-25 17:38:23 +0100 | [diff] [blame] | 76 | if (pmf_svc_descs[ii].init != NULL) { |
Yatharth Kochar | 9518d02 | 2016-03-11 14:20:19 +0000 | [diff] [blame] | 77 | rc = pmf_svc_descs[ii].init(); |
Antonio Nino Diaz | bf170be | 2018-10-25 17:38:23 +0100 | [diff] [blame] | 78 | if (rc != 0) { |
Yatharth Kochar | 9518d02 | 2016-03-11 14:20:19 +0000 | [diff] [blame] | 79 | WARN("Could not initialize PMF" |
| 80 | "service %s - skipping \n", |
| 81 | pmf_svc_descs[ii].name); |
| 82 | continue; |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | /* Update the pmf_svc_descs_indices array */ |
| 87 | pmf_svc_descs_indices[jj++] = ii; |
| 88 | } |
| 89 | |
| 90 | pmf_num_services = jj; |
| 91 | |
| 92 | /* |
| 93 | * Sort the successfully registered PMF services |
| 94 | * according to service ID |
| 95 | */ |
| 96 | for (ii = 1; ii < pmf_num_services; ii++) { |
| 97 | for (jj = 0; jj < (pmf_num_services - ii); jj++) { |
| 98 | if ((pmf_svc_descs[jj].svc_config & PMF_SVC_ID_MASK) > |
| 99 | (pmf_svc_descs[jj + 1].svc_config & |
| 100 | PMF_SVC_ID_MASK)) { |
| 101 | temp_val = pmf_svc_descs_indices[jj]; |
| 102 | pmf_svc_descs_indices[jj] = |
| 103 | pmf_svc_descs_indices[jj+1]; |
| 104 | pmf_svc_descs_indices[jj+1] = temp_val; |
| 105 | } |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | return 0; |
| 110 | } |
| 111 | |
| 112 | /* |
| 113 | * This function implements binary search to find registered |
| 114 | * PMF service based on Service ID provided in `tid` argument. |
| 115 | */ |
| 116 | static pmf_svc_desc_t *get_service(unsigned int tid) |
| 117 | { |
| 118 | int low = 0; |
| 119 | int mid; |
| 120 | int high = pmf_num_services; |
| 121 | unsigned int svc_id = tid & PMF_SVC_ID_MASK; |
| 122 | int index; |
| 123 | unsigned int desc_svc_id; |
| 124 | |
| 125 | if (pmf_num_services == 0) |
| 126 | return NULL; |
| 127 | |
Antonio Nino Diaz | bf170be | 2018-10-25 17:38:23 +0100 | [diff] [blame] | 128 | assert(pmf_svc_descs != NULL); |
Yatharth Kochar | 9518d02 | 2016-03-11 14:20:19 +0000 | [diff] [blame] | 129 | |
| 130 | do { |
| 131 | mid = (low + high) / 2; |
| 132 | index = pmf_svc_descs_indices[mid]; |
| 133 | |
| 134 | desc_svc_id = pmf_svc_descs[index].svc_config & PMF_SVC_ID_MASK; |
| 135 | if (svc_id < desc_svc_id) |
| 136 | high = mid - 1; |
| 137 | if (svc_id > desc_svc_id) |
| 138 | low = mid + 1; |
| 139 | } while ((svc_id != desc_svc_id) && (low <= high)); |
| 140 | |
| 141 | /* |
| 142 | * Make sure the Service found supports the tid range. |
| 143 | */ |
| 144 | if ((svc_id == desc_svc_id) && ((tid & PMF_TID_MASK) < |
| 145 | (pmf_svc_descs[index].svc_config & PMF_TID_MASK))) |
| 146 | return (pmf_svc_desc_t *)&pmf_svc_descs[index]; |
| 147 | |
| 148 | return NULL; |
| 149 | } |
| 150 | |
| 151 | /* |
| 152 | * This function gets the time-stamp value for the PMF services |
| 153 | * registered for SMC interface based on `tid` and `mpidr`. |
| 154 | */ |
| 155 | int pmf_get_timestamp_smc(unsigned int tid, |
| 156 | u_register_t mpidr, |
| 157 | unsigned int flags, |
| 158 | unsigned long long *ts_value) |
| 159 | { |
| 160 | pmf_svc_desc_t *svc_desc; |
Antonio Nino Diaz | bf170be | 2018-10-25 17:38:23 +0100 | [diff] [blame] | 161 | assert(ts_value != NULL); |
Yatharth Kochar | 9518d02 | 2016-03-11 14:20:19 +0000 | [diff] [blame] | 162 | |
| 163 | /* Search for registered service. */ |
| 164 | svc_desc = get_service(tid); |
| 165 | |
| 166 | if ((svc_desc == NULL) || (plat_core_pos_by_mpidr(mpidr) < 0)) { |
| 167 | *ts_value = 0; |
| 168 | return -EINVAL; |
| 169 | } else { |
| 170 | /* Call the service time-stamp handler. */ |
| 171 | *ts_value = svc_desc->get_ts(tid, mpidr, flags); |
| 172 | return 0; |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | /* |
| 177 | * This function can be used to dump `ts` value for given `tid`. |
| 178 | * Assumption is that the console is already initialized. |
| 179 | */ |
| 180 | void __pmf_dump_timestamp(unsigned int tid, unsigned long long ts) |
| 181 | { |
Antonio Nino Diaz | 00086e3 | 2018-08-16 16:46:06 +0100 | [diff] [blame] | 182 | printf("PMF:cpu %u tid %u ts %llu\n", |
Yatharth Kochar | 9518d02 | 2016-03-11 14:20:19 +0000 | [diff] [blame] | 183 | plat_my_core_pos(), tid, ts); |
| 184 | } |
| 185 | |
| 186 | /* |
| 187 | * This function calculate the address identified by |
| 188 | * `base_addr`, `tid` and `cpuid`. |
| 189 | */ |
| 190 | static inline uintptr_t calc_ts_addr(uintptr_t base_addr, |
| 191 | unsigned int tid, |
| 192 | unsigned int cpuid) |
| 193 | { |
| 194 | assert(cpuid < PLATFORM_CORE_COUNT); |
| 195 | assert(base_addr >= PMF_TIMESTAMP_ARRAY_START); |
| 196 | assert(base_addr < ((PMF_TIMESTAMP_ARRAY_START + |
| 197 | PMF_PERCPU_TIMESTAMP_SIZE) - ((tid & PMF_TID_MASK) * |
| 198 | sizeof(unsigned long long)))); |
| 199 | |
| 200 | base_addr += ((cpuid * PMF_PERCPU_TIMESTAMP_SIZE) + |
| 201 | ((tid & PMF_TID_MASK) * sizeof(unsigned long long))); |
| 202 | |
| 203 | return base_addr; |
| 204 | } |
| 205 | |
| 206 | /* |
| 207 | * This function stores the `ts` value to the storage identified by |
| 208 | * `base_addr`, `tid` and current cpu id. |
| 209 | * Note: The timestamp addresses are cache line aligned per cpu |
| 210 | * and only the owning CPU would ever write into it. |
| 211 | */ |
| 212 | void __pmf_store_timestamp(uintptr_t base_addr, |
| 213 | unsigned int tid, |
| 214 | unsigned long long ts) |
| 215 | { |
| 216 | unsigned long long *ts_addr = (unsigned long long *)calc_ts_addr(base_addr, |
| 217 | tid, plat_my_core_pos()); |
| 218 | *ts_addr = ts; |
| 219 | } |
| 220 | |
| 221 | /* |
| 222 | * This is the cached version of `pmf_store_my_timestamp` |
| 223 | * Note: The timestamp addresses are cache line aligned per cpu |
| 224 | * and only the owning CPU would ever write into it. |
| 225 | */ |
| 226 | void __pmf_store_timestamp_with_cache_maint(uintptr_t base_addr, |
| 227 | unsigned int tid, |
| 228 | unsigned long long ts) |
| 229 | { |
| 230 | unsigned long long *ts_addr = (unsigned long long *)calc_ts_addr(base_addr, |
| 231 | tid, plat_my_core_pos()); |
| 232 | *ts_addr = ts; |
| 233 | flush_dcache_range((uintptr_t)ts_addr, sizeof(unsigned long long)); |
| 234 | } |
| 235 | |
| 236 | /* |
| 237 | * This function retrieves the `ts` value from the storage identified by |
| 238 | * `base_addr`, `tid` and `cpuid`. |
| 239 | * Note: The timestamp addresses are cache line aligned per cpu. |
| 240 | */ |
| 241 | unsigned long long __pmf_get_timestamp(uintptr_t base_addr, |
| 242 | unsigned int tid, |
| 243 | unsigned int cpuid, |
| 244 | unsigned int flags) |
| 245 | { |
| 246 | assert(cpuid < PLATFORM_CORE_COUNT); |
| 247 | unsigned long long *ts_addr = (unsigned long long *)calc_ts_addr(base_addr, |
| 248 | tid, cpuid); |
| 249 | |
Antonio Nino Diaz | bf170be | 2018-10-25 17:38:23 +0100 | [diff] [blame] | 250 | if ((flags & PMF_CACHE_MAINT) != 0U) |
Yatharth Kochar | 9518d02 | 2016-03-11 14:20:19 +0000 | [diff] [blame] | 251 | inv_dcache_range((uintptr_t)ts_addr, sizeof(unsigned long long)); |
| 252 | |
| 253 | return *ts_addr; |
| 254 | } |