Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 1 | /* |
Varun Wadekar | 62d862e | 2018-01-08 11:35:40 -0800 | [diff] [blame] | 2 | * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved. |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 3 | * |
dp-arm | 82cb2c1 | 2017-05-03 09:38:09 +0100 | [diff] [blame] | 4 | * SPDX-License-Identifier: BSD-3-Clause |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 5 | */ |
| 6 | |
| 7 | /******************************************************************************* |
| 8 | * This is the Secure Payload Dispatcher (SPD). The dispatcher is meant to be a |
| 9 | * plug-in component to the Secure Monitor, registered as a runtime service. The |
| 10 | * SPD is expected to be a functional extension of the Secure Payload (SP) that |
| 11 | * executes in Secure EL1. The Secure Monitor will delegate all SMCs targeting |
| 12 | * the Trusted OS/Applications range to the dispatcher. The SPD will either |
| 13 | * handle the request locally or delegate it to the Secure Payload. It is also |
| 14 | * responsible for initialising and maintaining communication with the SP. |
| 15 | ******************************************************************************/ |
| 16 | #include <arch_helpers.h> |
| 17 | #include <assert.h> |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 18 | #include <bl31.h> |
Isla Mitchell | 2a4b4b7 | 2017-07-11 14:54:08 +0100 | [diff] [blame] | 19 | #include <bl_common.h> |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 20 | #include <context_mgmt.h> |
| 21 | #include <debug.h> |
| 22 | #include <errno.h> |
| 23 | #include <platform.h> |
| 24 | #include <runtime_svc.h> |
| 25 | #include <stddef.h> |
| 26 | #include <tlk.h> |
| 27 | #include <uuid.h> |
| 28 | #include "tlkd_private.h" |
| 29 | |
| 30 | extern const spd_pm_ops_t tlkd_pm_ops; |
| 31 | |
| 32 | /******************************************************************************* |
Varun Wadekar | cb790c5 | 2015-08-26 12:49:03 +0530 | [diff] [blame] | 33 | * Per-cpu Secure Payload state |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 34 | ******************************************************************************/ |
Varun Wadekar | cb790c5 | 2015-08-26 12:49:03 +0530 | [diff] [blame] | 35 | tlk_context_t tlk_ctx; |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 36 | |
Varun Wadekar | 26670c8 | 2016-06-07 21:21:59 -0700 | [diff] [blame] | 37 | /******************************************************************************* |
| 38 | * CPU number on which TLK booted up |
| 39 | ******************************************************************************/ |
Varun Wadekar | 6311f63 | 2017-06-07 09:57:42 -0700 | [diff] [blame] | 40 | static uint32_t boot_cpu; |
Varun Wadekar | 26670c8 | 2016-06-07 21:21:59 -0700 | [diff] [blame] | 41 | |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 42 | /* TLK UID: RFC-4122 compliant UUID (version-5, sha-1) */ |
| 43 | DEFINE_SVC_UUID(tlk_uuid, |
| 44 | 0xbd11e9c9, 0x2bba, 0x52ee, 0xb1, 0x72, |
| 45 | 0x46, 0x1f, 0xba, 0x97, 0x7f, 0x63); |
| 46 | |
Masahiro Yamada | 724fd95 | 2018-04-19 01:14:42 +0900 | [diff] [blame] | 47 | static int32_t tlkd_init(void); |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 48 | |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 49 | /******************************************************************************* |
| 50 | * Secure Payload Dispatcher setup. The SPD finds out the SP entrypoint and type |
| 51 | * (aarch32/aarch64) if not already known and initialises the context for entry |
| 52 | * into the SP for its initialisation. |
| 53 | ******************************************************************************/ |
Masahiro Yamada | 724fd95 | 2018-04-19 01:14:42 +0900 | [diff] [blame] | 54 | static int32_t tlkd_setup(void) |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 55 | { |
| 56 | entry_point_info_t *tlk_ep_info; |
| 57 | |
| 58 | /* |
| 59 | * Get information about the Secure Payload (BL32) image. Its |
| 60 | * absence is a critical failure. |
| 61 | */ |
| 62 | tlk_ep_info = bl31_plat_get_next_image_ep_info(SECURE); |
| 63 | if (!tlk_ep_info) { |
| 64 | WARN("No SP provided. Booting device without SP" |
| 65 | " initialization. SMC`s destined for SP" |
| 66 | " will return SMC_UNK\n"); |
| 67 | return 1; |
| 68 | } |
| 69 | |
| 70 | /* |
| 71 | * If there's no valid entry point for SP, we return a non-zero value |
| 72 | * signalling failure initializing the service. We bail out without |
| 73 | * registering any handlers |
| 74 | */ |
| 75 | if (!tlk_ep_info->pc) |
| 76 | return 1; |
| 77 | |
| 78 | /* |
| 79 | * Inspect the SP image's SPSR and determine it's execution state |
| 80 | * i.e whether AArch32 or AArch64. |
| 81 | */ |
| 82 | tlkd_init_tlk_ep_state(tlk_ep_info, |
| 83 | (tlk_ep_info->spsr >> MODE_RW_SHIFT) & MODE_RW_MASK, |
| 84 | tlk_ep_info->pc, |
| 85 | &tlk_ctx); |
| 86 | |
| 87 | /* |
| 88 | * All TLK SPD initialization done. Now register our init function |
| 89 | * with BL31 for deferred invocation |
| 90 | */ |
| 91 | bl31_register_bl32_init(&tlkd_init); |
| 92 | |
| 93 | return 0; |
| 94 | } |
| 95 | |
| 96 | /******************************************************************************* |
| 97 | * This function passes control to the Secure Payload image (BL32) for the first |
| 98 | * time on the primary cpu after a cold boot. It assumes that a valid secure |
| 99 | * context has already been created by tlkd_setup() which can be directly |
| 100 | * used. This function performs a synchronous entry into the Secure payload. |
| 101 | * The SP passes control back to this routine through a SMC. |
| 102 | ******************************************************************************/ |
Masahiro Yamada | 724fd95 | 2018-04-19 01:14:42 +0900 | [diff] [blame] | 103 | static int32_t tlkd_init(void) |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 104 | { |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 105 | entry_point_info_t *tlk_entry_point; |
| 106 | |
| 107 | /* |
| 108 | * Get information about the Secure Payload (BL32) image. Its |
| 109 | * absence is a critical failure. |
| 110 | */ |
| 111 | tlk_entry_point = bl31_plat_get_next_image_ep_info(SECURE); |
| 112 | assert(tlk_entry_point); |
| 113 | |
Soby Mathew | fd650ff | 2015-07-08 21:45:46 +0100 | [diff] [blame] | 114 | cm_init_my_context(tlk_entry_point); |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 115 | |
| 116 | /* |
Varun Wadekar | 26670c8 | 2016-06-07 21:21:59 -0700 | [diff] [blame] | 117 | * TLK runs only on a single CPU. Store the value of the boot |
| 118 | * CPU for sanity checking later. |
| 119 | */ |
| 120 | boot_cpu = plat_my_core_pos(); |
| 121 | |
| 122 | /* |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 123 | * Arrange for an entry into the test secure payload. |
| 124 | */ |
| 125 | return tlkd_synchronous_sp_entry(&tlk_ctx); |
| 126 | } |
| 127 | |
| 128 | /******************************************************************************* |
| 129 | * This function is responsible for handling all SMCs in the Trusted OS/App |
| 130 | * range from the non-secure state as defined in the SMC Calling Convention |
| 131 | * Document. It is also responsible for communicating with the Secure payload |
| 132 | * to delegate work and return results back to the non-secure state. Lastly it |
| 133 | * will also return any information that the secure payload needs to do the |
| 134 | * work assigned to it. |
| 135 | ******************************************************************************/ |
Masahiro Yamada | 57d1e5f | 2018-04-19 01:18:48 +0900 | [diff] [blame] | 136 | static uintptr_t tlkd_smc_handler(uint32_t smc_fid, |
| 137 | u_register_t x1, |
| 138 | u_register_t x2, |
| 139 | u_register_t x3, |
| 140 | u_register_t x4, |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 141 | void *cookie, |
| 142 | void *handle, |
Masahiro Yamada | 57d1e5f | 2018-04-19 01:18:48 +0900 | [diff] [blame] | 143 | u_register_t flags) |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 144 | { |
Varun Wadekar | 77199df | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 145 | cpu_context_t *ns_cpu_context; |
Varun Wadekar | 709a3c4 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 146 | gp_regs_t *gp_regs; |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 147 | uint32_t ns; |
Varun Wadekar | 709a3c4 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 148 | uint64_t par; |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 149 | |
| 150 | /* Passing a NULL context is a critical programming error */ |
| 151 | assert(handle); |
| 152 | |
Varun Wadekar | 26670c8 | 2016-06-07 21:21:59 -0700 | [diff] [blame] | 153 | /* These SMCs are only supported by a single CPU */ |
| 154 | if (boot_cpu != plat_my_core_pos()) |
Varun Wadekar | 6693962 | 2015-03-13 15:18:20 +0530 | [diff] [blame] | 155 | SMC_RET1(handle, SMC_UNK); |
| 156 | |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 157 | /* Determine which security state this SMC originated from */ |
| 158 | ns = is_caller_non_secure(flags); |
| 159 | |
| 160 | switch (smc_fid) { |
| 161 | |
| 162 | /* |
Varun Wadekar | f9d2505 | 2015-03-13 15:10:54 +0530 | [diff] [blame] | 163 | * This function ID is used by SP to indicate that it was |
| 164 | * preempted by a non-secure world IRQ. |
| 165 | */ |
| 166 | case TLK_PREEMPTED: |
| 167 | |
| 168 | if (ns) |
| 169 | SMC_RET1(handle, SMC_UNK); |
| 170 | |
| 171 | assert(handle == cm_get_context(SECURE)); |
| 172 | cm_el1_sysregs_context_save(SECURE); |
| 173 | |
| 174 | /* Get a reference to the non-secure context */ |
| 175 | ns_cpu_context = cm_get_context(NON_SECURE); |
| 176 | assert(ns_cpu_context); |
| 177 | |
| 178 | /* |
| 179 | * Restore non-secure state. There is no need to save the |
| 180 | * secure system register context since the SP was supposed |
| 181 | * to preserve it during S-EL1 interrupt handling. |
| 182 | */ |
| 183 | cm_el1_sysregs_context_restore(NON_SECURE); |
| 184 | cm_set_next_eret_context(NON_SECURE); |
| 185 | |
Varun Wadekar | 709a3c4 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 186 | SMC_RET1(ns_cpu_context, x1); |
Varun Wadekar | f9d2505 | 2015-03-13 15:10:54 +0530 | [diff] [blame] | 187 | |
| 188 | /* |
Varun Wadekar | 77199df | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 189 | * This is a request from the non-secure context to: |
| 190 | * |
| 191 | * a. register shared memory with the SP for storing it's |
| 192 | * activity logs. |
| 193 | * b. register shared memory with the SP for passing args |
| 194 | * required for maintaining sessions with the Trusted |
| 195 | * Applications. |
Varun Wadekar | 62d862e | 2018-01-08 11:35:40 -0800 | [diff] [blame] | 196 | * c. register non-secure world's memory map with the OS |
| 197 | * d. open/close sessions |
| 198 | * e. issue commands to the Trusted Apps |
| 199 | * f. resume the preempted yielding SMC call. |
Varun Wadekar | 77199df | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 200 | */ |
| 201 | case TLK_REGISTER_LOGBUF: |
| 202 | case TLK_REGISTER_REQBUF: |
Varun Wadekar | 62d862e | 2018-01-08 11:35:40 -0800 | [diff] [blame] | 203 | case TLK_REGISTER_NS_DRAM: |
Varun Wadekar | 6693962 | 2015-03-13 15:18:20 +0530 | [diff] [blame] | 204 | case TLK_OPEN_TA_SESSION: |
| 205 | case TLK_CLOSE_TA_SESSION: |
| 206 | case TLK_TA_LAUNCH_OP: |
| 207 | case TLK_TA_SEND_EVENT: |
Varun Wadekar | ca15d9b | 2015-10-07 17:15:41 +0530 | [diff] [blame] | 208 | case TLK_RESUME_FID: |
Varun Wadekar | 6693962 | 2015-03-13 15:18:20 +0530 | [diff] [blame] | 209 | |
Varun Wadekar | 709a3c4 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 210 | if (!ns) |
Varun Wadekar | 77199df | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 211 | SMC_RET1(handle, SMC_UNK); |
| 212 | |
| 213 | /* |
| 214 | * This is a fresh request from the non-secure client. |
| 215 | * The parameters are in x1 and x2. Figure out which |
| 216 | * registers need to be preserved, save the non-secure |
| 217 | * state and send the request to the secure payload. |
| 218 | */ |
| 219 | assert(handle == cm_get_context(NON_SECURE)); |
| 220 | |
Varun Wadekar | ca15d9b | 2015-10-07 17:15:41 +0530 | [diff] [blame] | 221 | /* |
David Cunado | bbbbcda | 2017-04-16 17:15:08 +0100 | [diff] [blame] | 222 | * Check if we are already processing a yielding SMC |
Varun Wadekar | ca15d9b | 2015-10-07 17:15:41 +0530 | [diff] [blame] | 223 | * call. Of all the supported fids, only the "resume" |
| 224 | * fid expects the flag to be set. |
| 225 | */ |
| 226 | if (smc_fid == TLK_RESUME_FID) { |
David Cunado | bbbbcda | 2017-04-16 17:15:08 +0100 | [diff] [blame] | 227 | if (!get_yield_smc_active_flag(tlk_ctx.state)) |
Varun Wadekar | ca15d9b | 2015-10-07 17:15:41 +0530 | [diff] [blame] | 228 | SMC_RET1(handle, SMC_UNK); |
| 229 | } else { |
David Cunado | bbbbcda | 2017-04-16 17:15:08 +0100 | [diff] [blame] | 230 | if (get_yield_smc_active_flag(tlk_ctx.state)) |
Varun Wadekar | ca15d9b | 2015-10-07 17:15:41 +0530 | [diff] [blame] | 231 | SMC_RET1(handle, SMC_UNK); |
| 232 | } |
Varun Wadekar | 77199df | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 233 | |
| 234 | cm_el1_sysregs_context_save(NON_SECURE); |
| 235 | |
| 236 | /* |
| 237 | * Verify if there is a valid context to use. |
| 238 | */ |
| 239 | assert(&tlk_ctx.cpu_ctx == cm_get_context(SECURE)); |
| 240 | |
| 241 | /* |
| 242 | * Mark the SP state as active. |
| 243 | */ |
David Cunado | bbbbcda | 2017-04-16 17:15:08 +0100 | [diff] [blame] | 244 | set_yield_smc_active_flag(tlk_ctx.state); |
Varun Wadekar | 77199df | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 245 | |
Varun Wadekar | 77199df | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 246 | /* |
| 247 | * We are done stashing the non-secure context. Ask the |
| 248 | * secure payload to do the work now. |
| 249 | */ |
| 250 | cm_el1_sysregs_context_restore(SECURE); |
| 251 | cm_set_next_eret_context(SECURE); |
Varun Wadekar | 709a3c4 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 252 | |
| 253 | /* |
| 254 | * TLK is a 32-bit Trusted OS and so expects the SMC |
| 255 | * arguments via r0-r7. TLK expects the monitor frame |
| 256 | * registers to be 64-bits long. Hence, we pass x0 in |
| 257 | * r0-r1, x1 in r2-r3, x3 in r4-r5 and x4 in r6-r7. |
| 258 | * |
| 259 | * As smc_fid is a uint32 value, r1 contains 0. |
| 260 | */ |
| 261 | gp_regs = get_gpregs_ctx(&tlk_ctx.cpu_ctx); |
| 262 | write_ctx_reg(gp_regs, CTX_GPREG_X4, (uint32_t)x2); |
| 263 | write_ctx_reg(gp_regs, CTX_GPREG_X5, (uint32_t)(x2 >> 32)); |
| 264 | write_ctx_reg(gp_regs, CTX_GPREG_X6, (uint32_t)x3); |
| 265 | write_ctx_reg(gp_regs, CTX_GPREG_X7, (uint32_t)(x3 >> 32)); |
| 266 | SMC_RET4(&tlk_ctx.cpu_ctx, smc_fid, 0, (uint32_t)x1, |
| 267 | (uint32_t)(x1 >> 32)); |
Varun Wadekar | 77199df | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 268 | |
| 269 | /* |
Varun Wadekar | 709a3c4 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 270 | * Translate NS/EL1-S virtual addresses. |
| 271 | * |
| 272 | * x1 = virtual address |
| 273 | * x3 = type (NS/S) |
| 274 | * |
| 275 | * Returns PA:lo in r0, PA:hi in r1. |
Varun Wadekar | 6e159e7 | 2015-03-13 14:59:03 +0530 | [diff] [blame] | 276 | */ |
| 277 | case TLK_VA_TRANSLATE: |
Varun Wadekar | 709a3c4 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 278 | |
| 279 | /* Should be invoked only by secure world */ |
| 280 | if (ns) |
Varun Wadekar | 6e159e7 | 2015-03-13 14:59:03 +0530 | [diff] [blame] | 281 | SMC_RET1(handle, SMC_UNK); |
| 282 | |
Varun Wadekar | 709a3c4 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 283 | /* NS virtual addresses are 64-bit long */ |
| 284 | if (x3 & TLK_TRANSLATE_NS_VADDR) |
| 285 | x1 = (uint32_t)x1 | (x2 << 32); |
| 286 | |
| 287 | if (!x1) |
| 288 | SMC_RET1(handle, SMC_UNK); |
| 289 | |
| 290 | /* |
| 291 | * TODO: Sanity check x1. This would require platform |
| 292 | * support. |
| 293 | */ |
| 294 | |
Varun Wadekar | 6e159e7 | 2015-03-13 14:59:03 +0530 | [diff] [blame] | 295 | /* virtual address and type: ns/s */ |
Varun Wadekar | 709a3c4 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 296 | par = tlkd_va_translate(x1, x3); |
Varun Wadekar | 6e159e7 | 2015-03-13 14:59:03 +0530 | [diff] [blame] | 297 | |
Varun Wadekar | 709a3c4 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 298 | /* return physical address in r0-r1 */ |
| 299 | SMC_RET4(handle, (uint32_t)par, (uint32_t)(par >> 32), 0, 0); |
Varun Wadekar | 6e159e7 | 2015-03-13 14:59:03 +0530 | [diff] [blame] | 300 | |
| 301 | /* |
Varun Wadekar | 77199df | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 302 | * This is a request from the SP to mark completion of |
David Cunado | bbbbcda | 2017-04-16 17:15:08 +0100 | [diff] [blame] | 303 | * a yielding function ID. |
Varun Wadekar | 77199df | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 304 | */ |
| 305 | case TLK_REQUEST_DONE: |
Varun Wadekar | 709a3c4 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 306 | if (ns) |
Varun Wadekar | 77199df | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 307 | SMC_RET1(handle, SMC_UNK); |
| 308 | |
| 309 | /* |
| 310 | * Mark the SP state as inactive. |
| 311 | */ |
David Cunado | bbbbcda | 2017-04-16 17:15:08 +0100 | [diff] [blame] | 312 | clr_yield_smc_active_flag(tlk_ctx.state); |
Varun Wadekar | 77199df | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 313 | |
| 314 | /* Get a reference to the non-secure context */ |
| 315 | ns_cpu_context = cm_get_context(NON_SECURE); |
| 316 | assert(ns_cpu_context); |
| 317 | |
| 318 | /* |
| 319 | * This is a request completion SMC and we must switch to |
| 320 | * the non-secure world to pass the result. |
| 321 | */ |
| 322 | cm_el1_sysregs_context_save(SECURE); |
| 323 | |
| 324 | /* |
| 325 | * We are done stashing the secure context. Switch to the |
| 326 | * non-secure context and return the result. |
| 327 | */ |
| 328 | cm_el1_sysregs_context_restore(NON_SECURE); |
| 329 | cm_set_next_eret_context(NON_SECURE); |
Varun Wadekar | 709a3c4 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 330 | SMC_RET1(ns_cpu_context, x1); |
Varun Wadekar | 77199df | 2015-03-13 14:19:11 +0530 | [diff] [blame] | 331 | |
| 332 | /* |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 333 | * This function ID is used only by the SP to indicate it has |
| 334 | * finished initialising itself after a cold boot |
| 335 | */ |
| 336 | case TLK_ENTRY_DONE: |
Varun Wadekar | 709a3c4 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 337 | if (ns) |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 338 | SMC_RET1(handle, SMC_UNK); |
| 339 | |
| 340 | /* |
| 341 | * SP has been successfully initialized. Register power |
| 342 | * managemnt hooks with PSCI |
| 343 | */ |
| 344 | psci_register_spd_pm_hook(&tlkd_pm_ops); |
| 345 | |
| 346 | /* |
| 347 | * TLK reports completion. The SPD must have initiated |
| 348 | * the original request through a synchronous entry |
| 349 | * into the SP. Jump back to the original C runtime |
| 350 | * context. |
| 351 | */ |
Varun Wadekar | 709a3c4 | 2015-04-02 14:57:47 +0530 | [diff] [blame] | 352 | tlkd_synchronous_sp_exit(&tlk_ctx, x1); |
Jonathan Wright | 185a23f | 2018-03-14 15:56:21 +0000 | [diff] [blame] | 353 | break; |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 354 | |
| 355 | /* |
Varun Wadekar | cb790c5 | 2015-08-26 12:49:03 +0530 | [diff] [blame] | 356 | * These function IDs are used only by TLK to indicate it has |
| 357 | * finished: |
| 358 | * 1. suspending itself after an earlier psci cpu_suspend |
| 359 | * request. |
| 360 | * 2. resuming itself after an earlier psci cpu_suspend |
| 361 | * request. |
| 362 | * 3. powering down after an earlier psci system_off/system_reset |
| 363 | * request. |
| 364 | */ |
| 365 | case TLK_SUSPEND_DONE: |
| 366 | case TLK_RESUME_DONE: |
| 367 | case TLK_SYSTEM_OFF_DONE: |
| 368 | |
| 369 | if (ns) |
| 370 | SMC_RET1(handle, SMC_UNK); |
| 371 | |
| 372 | /* |
| 373 | * TLK reports completion. TLKD must have initiated the |
| 374 | * original request through a synchronous entry into the SP. |
| 375 | * Jump back to the original C runtime context, and pass x1 as |
| 376 | * return value to the caller |
| 377 | */ |
| 378 | tlkd_synchronous_sp_exit(&tlk_ctx, x1); |
Jonathan Wright | 185a23f | 2018-03-14 15:56:21 +0000 | [diff] [blame] | 379 | break; |
Varun Wadekar | cb790c5 | 2015-08-26 12:49:03 +0530 | [diff] [blame] | 380 | |
| 381 | /* |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 382 | * Return the number of service function IDs implemented to |
| 383 | * provide service to non-secure |
| 384 | */ |
| 385 | case TOS_CALL_COUNT: |
| 386 | SMC_RET1(handle, TLK_NUM_FID); |
| 387 | |
| 388 | /* |
| 389 | * Return TLK's UID to the caller |
| 390 | */ |
| 391 | case TOS_UID: |
| 392 | SMC_UUID_RET(handle, tlk_uuid); |
| 393 | |
| 394 | /* |
| 395 | * Return the version of current implementation |
| 396 | */ |
| 397 | case TOS_CALL_VERSION: |
| 398 | SMC_RET2(handle, TLK_VERSION_MAJOR, TLK_VERSION_MINOR); |
| 399 | |
| 400 | default: |
| 401 | break; |
| 402 | } |
| 403 | |
| 404 | SMC_RET1(handle, SMC_UNK); |
| 405 | } |
| 406 | |
| 407 | /* Define a SPD runtime service descriptor for fast SMC calls */ |
| 408 | DECLARE_RT_SVC( |
| 409 | tlkd_tos_fast, |
| 410 | |
| 411 | OEN_TOS_START, |
| 412 | OEN_TOS_END, |
| 413 | SMC_TYPE_FAST, |
| 414 | tlkd_setup, |
| 415 | tlkd_smc_handler |
| 416 | ); |
| 417 | |
David Cunado | bbbbcda | 2017-04-16 17:15:08 +0100 | [diff] [blame] | 418 | /* Define a SPD runtime service descriptor for yielding SMC calls */ |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 419 | DECLARE_RT_SVC( |
| 420 | tlkd_tos_std, |
| 421 | |
| 422 | OEN_TOS_START, |
| 423 | OEN_TOS_END, |
David Cunado | bbbbcda | 2017-04-16 17:15:08 +0100 | [diff] [blame] | 424 | SMC_TYPE_YIELD, |
Varun Wadekar | 2203831 | 2015-03-13 14:01:03 +0530 | [diff] [blame] | 425 | NULL, |
| 426 | tlkd_smc_handler |
| 427 | ); |
Varun Wadekar | 6693962 | 2015-03-13 15:18:20 +0530 | [diff] [blame] | 428 | |
| 429 | /* Define a SPD runtime service descriptor for fast SMC calls */ |
| 430 | DECLARE_RT_SVC( |
| 431 | tlkd_tap_fast, |
| 432 | |
| 433 | OEN_TAP_START, |
| 434 | OEN_TAP_END, |
| 435 | SMC_TYPE_FAST, |
| 436 | NULL, |
| 437 | tlkd_smc_handler |
| 438 | ); |
| 439 | |
David Cunado | bbbbcda | 2017-04-16 17:15:08 +0100 | [diff] [blame] | 440 | /* Define a SPD runtime service descriptor for yielding SMC calls */ |
Varun Wadekar | 6693962 | 2015-03-13 15:18:20 +0530 | [diff] [blame] | 441 | DECLARE_RT_SVC( |
| 442 | tlkd_tap_std, |
| 443 | |
| 444 | OEN_TAP_START, |
| 445 | OEN_TAP_END, |
David Cunado | bbbbcda | 2017-04-16 17:15:08 +0100 | [diff] [blame] | 446 | SMC_TYPE_YIELD, |
Varun Wadekar | 6693962 | 2015-03-13 15:18:20 +0530 | [diff] [blame] | 447 | NULL, |
| 448 | tlkd_smc_handler |
| 449 | ); |