plat/rockchip/common/rockchip_sip_svc.c

   1 /*
   2  * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
   3  *
   4  * SPDX-License-Identifier: BSD-3-Clause
   5  */
   6
   7 #include <assert.h>
   8
   9 #include <common/debug.h>
  10 #include <common/runtime_svc.h>
  11 #include <lib/mmio.h>
  12 #include <tools_share/uuid.h>
  13
  14 #include <plat_sip_calls.h>
  15 #include <rockchip_sip_svc.h>
  16
  17 /* Rockchip SiP Service UUID */
  18 DEFINE_SVC_UUID2(rk_sip_svc_uid,
  19         0xe2c76fe8, 0x3e31, 0xe611, 0xb7, 0x0d,
  20         0x8f, 0x88, 0xee, 0x74, 0x7b, 0x72);
  21
  22 #pragma weak rockchip_plat_sip_handler
  23 uintptr_t rockchip_plat_sip_handler(uint32_t smc_fid,
  24                                     u_register_t x1,
  25                                     u_register_t x2,
  26                                     u_register_t x3,
  27                                     u_register_t x4,
  28                                     void *cookie,
  29                                     void *handle,
  30                                     u_register_t flags)
  31 {
  32         ERROR("%s: unhandled SMC (0x%x)\n", __func__, smc_fid);
  33         SMC_RET1(handle, SMC_UNK);
  34 }
  35
  36 /*
  37  * This function is responsible for handling all SiP calls from the NS world
  38  */
  39 uintptr_t sip_smc_handler(uint32_t smc_fid,
  40                           u_register_t x1,
  41                           u_register_t x2,
  42                           u_register_t x3,
  43                           u_register_t x4,
  44                           void *cookie,
  45                           void *handle,
  46                           u_register_t flags)
  47 {
  48         uint32_t ns;
  49
  50         /* Determine which security state this SMC originated from */
  51         ns = is_caller_non_secure(flags);
  52         if (!ns)
  53                 SMC_RET1(handle, SMC_UNK);
  54
  55         switch (smc_fid) {
  56         case SIP_SVC_CALL_COUNT:
  57                 /* Return the number of Rockchip SiP Service Calls. */
  58                 SMC_RET1(handle,
  59                          RK_COMMON_SIP_NUM_CALLS + RK_PLAT_SIP_NUM_CALLS);
  60
  61         case SIP_SVC_UID:
  62                 /* Return UID to the caller */
  63                 SMC_UUID_RET(handle, rk_sip_svc_uid);
  64
  65         case SIP_SVC_VERSION:
  66                 /* Return the version of current implementation */
  67                 SMC_RET2(handle, RK_SIP_SVC_VERSION_MAJOR,
  68                         RK_SIP_SVC_VERSION_MINOR);
  69
  70         default:
  71                 return rockchip_plat_sip_handler(smc_fid, x1, x2, x3, x4,
  72                         cookie, handle, flags);
  73         }
  74 }
  75
  76 /* Define a runtime service descriptor for fast SMC calls */
  77 DECLARE_RT_SVC(
  78         rockchip_sip_svc,
  79         OEN_SIP_START,
  80         OEN_SIP_END,
  81         SMC_TYPE_FAST,
  82         NULL,
  83         sip_smc_handler
  84 );