Varun Wadekar | 3d4e6a5 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 1 | /* |
Varun Wadekar | 0bbe8a6 | 2016-06-07 21:21:59 -0700 | [diff] [blame] | 2 | * Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved. |
Varun Wadekar | 3d4e6a5 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions are met: |
| 6 | * |
| 7 | * Redistributions of source code must retain the above copyright notice, this |
| 8 | * list of conditions and the following disclaimer. |
| 9 | * |
| 10 | * Redistributions in binary form must reproduce the above copyright notice, |
| 11 | * this list of conditions and the following disclaimer in the documentation |
| 12 | * and/or other materials provided with the distribution. |
| 13 | * |
| 14 | * Neither the name of ARM nor the names of its contributors may be used |
| 15 | * to endorse or promote products derived from this software without specific |
| 16 | * prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| 22 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 23 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 24 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 25 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 26 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 27 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 28 | * POSSIBILITY OF SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | /******************************************************************************* |
| 32 | * This is the Secure Payload Dispatcher (SPD). The dispatcher is meant to be a |
| 33 | * plug-in component to the Secure Monitor, registered as a runtime service. The |
| 34 | * SPD is expected to be a functional extension of the Secure Payload (SP) that |
| 35 | * executes in Secure EL1. The Secure Monitor will delegate all SMCs targeting |
| 36 | * the Trusted OS/Applications range to the dispatcher. The SPD will either |
| 37 | * handle the request locally or delegate it to the Secure Payload. It is also |
| 38 | * responsible for initialising and maintaining communication with the SP. |
| 39 | ******************************************************************************/ |
| 40 | #include <arch_helpers.h> |
| 41 | #include <assert.h> |
| 42 | #include <bl_common.h> |
| 43 | #include <bl31.h> |
| 44 | #include <context_mgmt.h> |
| 45 | #include <debug.h> |
| 46 | #include <errno.h> |
| 47 | #include <platform.h> |
| 48 | #include <runtime_svc.h> |
| 49 | #include <stddef.h> |
| 50 | #include <tlk.h> |
| 51 | #include <uuid.h> |
| 52 | #include "tlkd_private.h" |
| 53 | |
| 54 | extern const spd_pm_ops_t tlkd_pm_ops; |
| 55 | |
| 56 | /******************************************************************************* |
Varun Wadekar | a70dec3 | 2015-08-26 12:49:03 +0530 | [diff] [blame] | 57 | * Per-cpu Secure Payload state |
Varun Wadekar | 3d4e6a5 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 58 | ******************************************************************************/ |
Varun Wadekar | a70dec3 | 2015-08-26 12:49:03 +0530 | [diff] [blame] | 59 | tlk_context_t tlk_ctx; |
Varun Wadekar | 3d4e6a5 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 60 | |
Varun Wadekar | 0bbe8a6 | 2016-06-07 21:21:59 -0700 | [diff] [blame] | 61 | /******************************************************************************* |
| 62 | * CPU number on which TLK booted up |
| 63 | ******************************************************************************/ |
| 64 | static int boot_cpu; |
| 65 | |
Varun Wadekar | 3d4e6a5 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 66 | /* TLK UID: RFC-4122 compliant UUID (version-5, sha-1) */ |
| 67 | DEFINE_SVC_UUID(tlk_uuid, |
| 68 | 0xbd11e9c9, 0x2bba, 0x52ee, 0xb1, 0x72, |
| 69 | 0x46, 0x1f, 0xba, 0x97, 0x7f, 0x63); |
| 70 | |
| 71 | int32_t tlkd_init(void); |
| 72 | |
Varun Wadekar | 3d4e6a5 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 73 | /******************************************************************************* |
| 74 | * Secure Payload Dispatcher setup. The SPD finds out the SP entrypoint and type |
| 75 | * (aarch32/aarch64) if not already known and initialises the context for entry |
| 76 | * into the SP for its initialisation. |
| 77 | ******************************************************************************/ |
| 78 | int32_t tlkd_setup(void) |
| 79 | { |
| 80 | entry_point_info_t *tlk_ep_info; |
| 81 | |
| 82 | /* |
| 83 | * Get information about the Secure Payload (BL32) image. Its |
| 84 | * absence is a critical failure. |
| 85 | */ |
| 86 | tlk_ep_info = bl31_plat_get_next_image_ep_info(SECURE); |
| 87 | if (!tlk_ep_info) { |
| 88 | WARN("No SP provided. Booting device without SP" |
| 89 | " initialization. SMC`s destined for SP" |
| 90 | " will return SMC_UNK\n"); |
| 91 | return 1; |
| 92 | } |
| 93 | |
| 94 | /* |
| 95 | * If there's no valid entry point for SP, we return a non-zero value |
| 96 | * signalling failure initializing the service. We bail out without |
| 97 | * registering any handlers |
| 98 | */ |
| 99 | if (!tlk_ep_info->pc) |
| 100 | return 1; |
| 101 | |
| 102 | /* |
| 103 | * Inspect the SP image's SPSR and determine it's execution state |
| 104 | * i.e whether AArch32 or AArch64. |
| 105 | */ |
| 106 | tlkd_init_tlk_ep_state(tlk_ep_info, |
| 107 | (tlk_ep_info->spsr >> MODE_RW_SHIFT) & MODE_RW_MASK, |
| 108 | tlk_ep_info->pc, |
| 109 | &tlk_ctx); |
| 110 | |
| 111 | /* |
| 112 | * All TLK SPD initialization done. Now register our init function |
| 113 | * with BL31 for deferred invocation |
| 114 | */ |
| 115 | bl31_register_bl32_init(&tlkd_init); |
| 116 | |
| 117 | return 0; |
| 118 | } |
| 119 | |
| 120 | /******************************************************************************* |
| 121 | * This function passes control to the Secure Payload image (BL32) for the first |
| 122 | * time on the primary cpu after a cold boot. It assumes that a valid secure |
| 123 | * context has already been created by tlkd_setup() which can be directly |
| 124 | * used. This function performs a synchronous entry into the Secure payload. |
| 125 | * The SP passes control back to this routine through a SMC. |
| 126 | ******************************************************************************/ |
| 127 | int32_t tlkd_init(void) |
| 128 | { |
Varun Wadekar | 3d4e6a5 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 129 | entry_point_info_t *tlk_entry_point; |
| 130 | |
| 131 | /* |
| 132 | * Get information about the Secure Payload (BL32) image. Its |
| 133 | * absence is a critical failure. |
| 134 | */ |
| 135 | tlk_entry_point = bl31_plat_get_next_image_ep_info(SECURE); |
| 136 | assert(tlk_entry_point); |
| 137 | |
Soby Mathew | da43b66 | 2015-07-08 21:45:46 +0100 | [diff] [blame] | 138 | cm_init_my_context(tlk_entry_point); |
Varun Wadekar | 3d4e6a5 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 139 | |
| 140 | /* |
Varun Wadekar | 0bbe8a6 | 2016-06-07 21:21:59 -0700 | [diff] [blame] | 141 | * TLK runs only on a single CPU. Store the value of the boot |
| 142 | * CPU for sanity checking later. |
| 143 | */ |
| 144 | boot_cpu = plat_my_core_pos(); |
| 145 | |
| 146 | /* |
Varun Wadekar | 3d4e6a5 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 147 | * Arrange for an entry into the test secure payload. |
| 148 | */ |
| 149 | return tlkd_synchronous_sp_entry(&tlk_ctx); |
| 150 | } |
| 151 | |
| 152 | /******************************************************************************* |
| 153 | * This function is responsible for handling all SMCs in the Trusted OS/App |
| 154 | * range from the non-secure state as defined in the SMC Calling Convention |
| 155 | * Document. It is also responsible for communicating with the Secure payload |
| 156 | * to delegate work and return results back to the non-secure state. Lastly it |
| 157 | * will also return any information that the secure payload needs to do the |
| 158 | * work assigned to it. |
| 159 | ******************************************************************************/ |
| 160 | uint64_t tlkd_smc_handler(uint32_t smc_fid, |
| 161 | uint64_t x1, |
| 162 | uint64_t x2, |
| 163 | uint64_t x3, |
| 164 | uint64_t x4, |
| 165 | void *cookie, |
| 166 | void *handle, |
| 167 | uint64_t flags) |
| 168 | { |
Varun Wadekar | a97535f | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 169 | cpu_context_t *ns_cpu_context; |
Varun Wadekar | ebfeae9 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 170 | gp_regs_t *gp_regs; |
Varun Wadekar | 3d4e6a5 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 171 | uint32_t ns; |
Varun Wadekar | ebfeae9 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 172 | uint64_t par; |
Varun Wadekar | 3d4e6a5 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 173 | |
| 174 | /* Passing a NULL context is a critical programming error */ |
| 175 | assert(handle); |
| 176 | |
Varun Wadekar | 0bbe8a6 | 2016-06-07 21:21:59 -0700 | [diff] [blame] | 177 | /* These SMCs are only supported by a single CPU */ |
| 178 | if (boot_cpu != plat_my_core_pos()) |
Varun Wadekar | b539b6c | 2015-03-13 15:18:20 +0530 | [diff] [blame] | 179 | SMC_RET1(handle, SMC_UNK); |
| 180 | |
Varun Wadekar | 3d4e6a5 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 181 | /* Determine which security state this SMC originated from */ |
| 182 | ns = is_caller_non_secure(flags); |
| 183 | |
| 184 | switch (smc_fid) { |
| 185 | |
| 186 | /* |
Varun Wadekar | 968c029 | 2015-03-13 15:10:54 +0530 | [diff] [blame] | 187 | * This function ID is used by SP to indicate that it was |
| 188 | * preempted by a non-secure world IRQ. |
| 189 | */ |
| 190 | case TLK_PREEMPTED: |
| 191 | |
| 192 | if (ns) |
| 193 | SMC_RET1(handle, SMC_UNK); |
| 194 | |
| 195 | assert(handle == cm_get_context(SECURE)); |
| 196 | cm_el1_sysregs_context_save(SECURE); |
| 197 | |
| 198 | /* Get a reference to the non-secure context */ |
| 199 | ns_cpu_context = cm_get_context(NON_SECURE); |
| 200 | assert(ns_cpu_context); |
| 201 | |
| 202 | /* |
| 203 | * Restore non-secure state. There is no need to save the |
| 204 | * secure system register context since the SP was supposed |
| 205 | * to preserve it during S-EL1 interrupt handling. |
| 206 | */ |
| 207 | cm_el1_sysregs_context_restore(NON_SECURE); |
| 208 | cm_set_next_eret_context(NON_SECURE); |
| 209 | |
Varun Wadekar | ebfeae9 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 210 | SMC_RET1(ns_cpu_context, x1); |
Varun Wadekar | 968c029 | 2015-03-13 15:10:54 +0530 | [diff] [blame] | 211 | |
| 212 | /* |
Varun Wadekar | a97535f | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 213 | * This is a request from the non-secure context to: |
| 214 | * |
| 215 | * a. register shared memory with the SP for storing it's |
| 216 | * activity logs. |
| 217 | * b. register shared memory with the SP for passing args |
| 218 | * required for maintaining sessions with the Trusted |
| 219 | * Applications. |
Varun Wadekar | b539b6c | 2015-03-13 15:18:20 +0530 | [diff] [blame] | 220 | * c. open/close sessions |
| 221 | * d. issue commands to the Trusted Apps |
Varun Wadekar | 5e1fa05 | 2015-10-07 17:15:41 +0530 | [diff] [blame] | 222 | * e. resume the preempted standard SMC call. |
Varun Wadekar | a97535f | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 223 | */ |
| 224 | case TLK_REGISTER_LOGBUF: |
| 225 | case TLK_REGISTER_REQBUF: |
Varun Wadekar | b539b6c | 2015-03-13 15:18:20 +0530 | [diff] [blame] | 226 | case TLK_OPEN_TA_SESSION: |
| 227 | case TLK_CLOSE_TA_SESSION: |
| 228 | case TLK_TA_LAUNCH_OP: |
| 229 | case TLK_TA_SEND_EVENT: |
Varun Wadekar | 5e1fa05 | 2015-10-07 17:15:41 +0530 | [diff] [blame] | 230 | case TLK_RESUME_FID: |
Varun Wadekar | b539b6c | 2015-03-13 15:18:20 +0530 | [diff] [blame] | 231 | |
Varun Wadekar | ebfeae9 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 232 | if (!ns) |
Varun Wadekar | a97535f | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 233 | SMC_RET1(handle, SMC_UNK); |
| 234 | |
| 235 | /* |
| 236 | * This is a fresh request from the non-secure client. |
| 237 | * The parameters are in x1 and x2. Figure out which |
| 238 | * registers need to be preserved, save the non-secure |
| 239 | * state and send the request to the secure payload. |
| 240 | */ |
| 241 | assert(handle == cm_get_context(NON_SECURE)); |
| 242 | |
Varun Wadekar | 5e1fa05 | 2015-10-07 17:15:41 +0530 | [diff] [blame] | 243 | /* |
| 244 | * Check if we are already processing a standard SMC |
| 245 | * call. Of all the supported fids, only the "resume" |
| 246 | * fid expects the flag to be set. |
| 247 | */ |
| 248 | if (smc_fid == TLK_RESUME_FID) { |
| 249 | if (!get_std_smc_active_flag(tlk_ctx.state)) |
| 250 | SMC_RET1(handle, SMC_UNK); |
| 251 | } else { |
| 252 | if (get_std_smc_active_flag(tlk_ctx.state)) |
| 253 | SMC_RET1(handle, SMC_UNK); |
| 254 | } |
Varun Wadekar | a97535f | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 255 | |
| 256 | cm_el1_sysregs_context_save(NON_SECURE); |
| 257 | |
| 258 | /* |
| 259 | * Verify if there is a valid context to use. |
| 260 | */ |
| 261 | assert(&tlk_ctx.cpu_ctx == cm_get_context(SECURE)); |
| 262 | |
| 263 | /* |
| 264 | * Mark the SP state as active. |
| 265 | */ |
| 266 | set_std_smc_active_flag(tlk_ctx.state); |
| 267 | |
Varun Wadekar | a97535f | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 268 | /* |
| 269 | * We are done stashing the non-secure context. Ask the |
| 270 | * secure payload to do the work now. |
| 271 | */ |
| 272 | cm_el1_sysregs_context_restore(SECURE); |
| 273 | cm_set_next_eret_context(SECURE); |
Varun Wadekar | ebfeae9 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 274 | |
| 275 | /* |
| 276 | * TLK is a 32-bit Trusted OS and so expects the SMC |
| 277 | * arguments via r0-r7. TLK expects the monitor frame |
| 278 | * registers to be 64-bits long. Hence, we pass x0 in |
| 279 | * r0-r1, x1 in r2-r3, x3 in r4-r5 and x4 in r6-r7. |
| 280 | * |
| 281 | * As smc_fid is a uint32 value, r1 contains 0. |
| 282 | */ |
| 283 | gp_regs = get_gpregs_ctx(&tlk_ctx.cpu_ctx); |
| 284 | write_ctx_reg(gp_regs, CTX_GPREG_X4, (uint32_t)x2); |
| 285 | write_ctx_reg(gp_regs, CTX_GPREG_X5, (uint32_t)(x2 >> 32)); |
| 286 | write_ctx_reg(gp_regs, CTX_GPREG_X6, (uint32_t)x3); |
| 287 | write_ctx_reg(gp_regs, CTX_GPREG_X7, (uint32_t)(x3 >> 32)); |
| 288 | SMC_RET4(&tlk_ctx.cpu_ctx, smc_fid, 0, (uint32_t)x1, |
| 289 | (uint32_t)(x1 >> 32)); |
Varun Wadekar | a97535f | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 290 | |
| 291 | /* |
Varun Wadekar | ebfeae9 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 292 | * Translate NS/EL1-S virtual addresses. |
| 293 | * |
| 294 | * x1 = virtual address |
| 295 | * x3 = type (NS/S) |
| 296 | * |
| 297 | * Returns PA:lo in r0, PA:hi in r1. |
Varun Wadekar | 97625e3 | 2015-03-13 14:59:03 +0530 | [diff] [blame] | 298 | */ |
| 299 | case TLK_VA_TRANSLATE: |
Varun Wadekar | ebfeae9 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 300 | |
| 301 | /* Should be invoked only by secure world */ |
| 302 | if (ns) |
Varun Wadekar | 97625e3 | 2015-03-13 14:59:03 +0530 | [diff] [blame] | 303 | SMC_RET1(handle, SMC_UNK); |
| 304 | |
Varun Wadekar | ebfeae9 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 305 | /* NS virtual addresses are 64-bit long */ |
| 306 | if (x3 & TLK_TRANSLATE_NS_VADDR) |
| 307 | x1 = (uint32_t)x1 | (x2 << 32); |
Varun Wadekar | 97625e3 | 2015-03-13 14:59:03 +0530 | [diff] [blame] | 308 | |
Varun Wadekar | ebfeae9 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 309 | if (!x1) |
| 310 | SMC_RET1(handle, SMC_UNK); |
Varun Wadekar | 97625e3 | 2015-03-13 14:59:03 +0530 | [diff] [blame] | 311 | |
Varun Wadekar | ebfeae9 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 312 | /* |
| 313 | * TODO: Sanity check x1. This would require platform |
| 314 | * support. |
| 315 | */ |
Varun Wadekar | 97625e3 | 2015-03-13 14:59:03 +0530 | [diff] [blame] | 316 | |
Varun Wadekar | ebfeae9 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 317 | /* virtual address and type: ns/s */ |
| 318 | par = tlkd_va_translate(x1, x3); |
| 319 | |
| 320 | /* return physical address in r0-r1 */ |
| 321 | SMC_RET4(handle, (uint32_t)par, (uint32_t)(par >> 32), 0, 0); |
Varun Wadekar | 97625e3 | 2015-03-13 14:59:03 +0530 | [diff] [blame] | 322 | |
| 323 | /* |
Varun Wadekar | a97535f | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 324 | * This is a request from the SP to mark completion of |
| 325 | * a standard function ID. |
| 326 | */ |
| 327 | case TLK_REQUEST_DONE: |
Varun Wadekar | ebfeae9 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 328 | if (ns) |
Varun Wadekar | a97535f | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 329 | SMC_RET1(handle, SMC_UNK); |
| 330 | |
| 331 | /* |
| 332 | * Mark the SP state as inactive. |
| 333 | */ |
| 334 | clr_std_smc_active_flag(tlk_ctx.state); |
| 335 | |
| 336 | /* Get a reference to the non-secure context */ |
| 337 | ns_cpu_context = cm_get_context(NON_SECURE); |
| 338 | assert(ns_cpu_context); |
| 339 | |
| 340 | /* |
| 341 | * This is a request completion SMC and we must switch to |
| 342 | * the non-secure world to pass the result. |
| 343 | */ |
| 344 | cm_el1_sysregs_context_save(SECURE); |
| 345 | |
| 346 | /* |
| 347 | * We are done stashing the secure context. Switch to the |
| 348 | * non-secure context and return the result. |
| 349 | */ |
| 350 | cm_el1_sysregs_context_restore(NON_SECURE); |
| 351 | cm_set_next_eret_context(NON_SECURE); |
Varun Wadekar | ebfeae9 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 352 | SMC_RET1(ns_cpu_context, x1); |
Varun Wadekar | a97535f | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 353 | |
| 354 | /* |
Varun Wadekar | 3d4e6a5 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 355 | * This function ID is used only by the SP to indicate it has |
| 356 | * finished initialising itself after a cold boot |
| 357 | */ |
| 358 | case TLK_ENTRY_DONE: |
Varun Wadekar | ebfeae9 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 359 | if (ns) |
Varun Wadekar | 3d4e6a5 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 360 | SMC_RET1(handle, SMC_UNK); |
| 361 | |
| 362 | /* |
| 363 | * SP has been successfully initialized. Register power |
| 364 | * managemnt hooks with PSCI |
| 365 | */ |
| 366 | psci_register_spd_pm_hook(&tlkd_pm_ops); |
| 367 | |
| 368 | /* |
| 369 | * TLK reports completion. The SPD must have initiated |
| 370 | * the original request through a synchronous entry |
| 371 | * into the SP. Jump back to the original C runtime |
| 372 | * context. |
| 373 | */ |
Varun Wadekar | ebfeae9 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 374 | tlkd_synchronous_sp_exit(&tlk_ctx, x1); |
Varun Wadekar | 3d4e6a5 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 375 | |
| 376 | /* |
Varun Wadekar | a70dec3 | 2015-08-26 12:49:03 +0530 | [diff] [blame] | 377 | * These function IDs are used only by TLK to indicate it has |
| 378 | * finished: |
| 379 | * 1. suspending itself after an earlier psci cpu_suspend |
| 380 | * request. |
| 381 | * 2. resuming itself after an earlier psci cpu_suspend |
| 382 | * request. |
| 383 | * 3. powering down after an earlier psci system_off/system_reset |
| 384 | * request. |
| 385 | */ |
| 386 | case TLK_SUSPEND_DONE: |
| 387 | case TLK_RESUME_DONE: |
| 388 | case TLK_SYSTEM_OFF_DONE: |
| 389 | |
| 390 | if (ns) |
| 391 | SMC_RET1(handle, SMC_UNK); |
| 392 | |
| 393 | /* |
| 394 | * TLK reports completion. TLKD must have initiated the |
| 395 | * original request through a synchronous entry into the SP. |
| 396 | * Jump back to the original C runtime context, and pass x1 as |
| 397 | * return value to the caller |
| 398 | */ |
| 399 | tlkd_synchronous_sp_exit(&tlk_ctx, x1); |
| 400 | |
| 401 | /* |
Varun Wadekar | 3d4e6a5 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 402 | * Return the number of service function IDs implemented to |
| 403 | * provide service to non-secure |
| 404 | */ |
| 405 | case TOS_CALL_COUNT: |
| 406 | SMC_RET1(handle, TLK_NUM_FID); |
| 407 | |
| 408 | /* |
| 409 | * Return TLK's UID to the caller |
| 410 | */ |
| 411 | case TOS_UID: |
| 412 | SMC_UUID_RET(handle, tlk_uuid); |
| 413 | |
| 414 | /* |
| 415 | * Return the version of current implementation |
| 416 | */ |
| 417 | case TOS_CALL_VERSION: |
| 418 | SMC_RET2(handle, TLK_VERSION_MAJOR, TLK_VERSION_MINOR); |
| 419 | |
| 420 | default: |
| 421 | break; |
| 422 | } |
| 423 | |
| 424 | SMC_RET1(handle, SMC_UNK); |
| 425 | } |
| 426 | |
| 427 | /* Define a SPD runtime service descriptor for fast SMC calls */ |
| 428 | DECLARE_RT_SVC( |
| 429 | tlkd_tos_fast, |
| 430 | |
| 431 | OEN_TOS_START, |
| 432 | OEN_TOS_END, |
| 433 | SMC_TYPE_FAST, |
| 434 | tlkd_setup, |
| 435 | tlkd_smc_handler |
| 436 | ); |
| 437 | |
| 438 | /* Define a SPD runtime service descriptor for standard SMC calls */ |
| 439 | DECLARE_RT_SVC( |
| 440 | tlkd_tos_std, |
| 441 | |
| 442 | OEN_TOS_START, |
| 443 | OEN_TOS_END, |
| 444 | SMC_TYPE_STD, |
| 445 | NULL, |
| 446 | tlkd_smc_handler |
| 447 | ); |
Varun Wadekar | b539b6c | 2015-03-13 15:18:20 +0530 | [diff] [blame] | 448 | |
| 449 | /* Define a SPD runtime service descriptor for fast SMC calls */ |
| 450 | DECLARE_RT_SVC( |
| 451 | tlkd_tap_fast, |
| 452 | |
| 453 | OEN_TAP_START, |
| 454 | OEN_TAP_END, |
| 455 | SMC_TYPE_FAST, |
| 456 | NULL, |
| 457 | tlkd_smc_handler |
| 458 | ); |
| 459 | |
| 460 | /* Define a SPD runtime service descriptor for standard SMC calls */ |
| 461 | DECLARE_RT_SVC( |
| 462 | tlkd_tap_std, |
| 463 | |
| 464 | OEN_TAP_START, |
| 465 | OEN_TAP_END, |
| 466 | SMC_TYPE_STD, |
| 467 | NULL, |
| 468 | tlkd_smc_handler |
| 469 | ); |