arch/arm/mach-mt8127/include/mach/mt_secure_api.h

   1 /*
   2  */
   3
   4 #ifndef _MT_SECURE_API_H_
   5 #define _MT_SECURE_API_H_
   6
   7 /* Use the arch_extension sec pseudo op before switching to secure world */
   8 #if defined(__GNUC__) && \
   9         defined(__GNUC_MINOR__) && \
  10         defined(__GNUC_PATCHLEVEL__) && \
  11         ((__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)) \
  12         >= 40502
  13 #define MC_ARCH_EXTENSION_SEC
  14 #endif
  15
  16
  17 /*
  18  * return code for fastcalls
  19  */
  20 #define MC_FC_RET_OK                                    0
  21 #define MC_FC_RET_ERR_INVALID                   1
  22
  23
  24
  25 /* t-base fastcall  */
  26 /*
  27  * Command to inform SW that we will enter in Power Sleep (Dormant).
  28  * Parameters:
  29  *   - param0, the NW wakeup addr (phys).
  30  *   - param1, the cpuID who will sleep
  31  *   - param2, unused.
  32  * Return:
  33  *   - Cannot fail, always MC_FC_RET_OK.
  34  */
  35 #define MC_FC_SLEEP                     -3
  36 /*
  37  * Command to write NW reset addr for Slave cpus.
  38  * Parameters:
  39  *   - param0, the NW reset addr (phys).
  40  *   - param1, the cpuID.
  41  *   - param2, unused.
  42  * Return:
  43  *   - Cannot fail, always MC_FC_RET_OK.
  44  */
  45 #define MC_FC_SET_RESET_VECTOR          -301
  46 /*
  47  * Command to switch off BootRom.
  48  * Parameters:
  49  *   - param0, unused.
  50  *   - param1, unsued.
  51  *   - param2, unused.
  52  * Return:
  53  *   - Cannot fail, always MC_FC_RET_OK.
  54  */
  55 #define MC_FC_TURN_OFF_BOOTROM          -302
  56 /*
  57  * Command to cancel a sleep command in case of Dormant abort.
  58  * Parameters:
  59  *   - param0, unused.
  60  *   - param1, unsued.
  61  *   - param2, unused.
  62  * Return:
  63  *   - Cannot fail, always MC_FC_RET_OK.
  64  */
  65 #define MC_FC_SLEEP_CANCELLED           -302
  66
  67
  68
  69 /*
  70  * mt_secure_call
  71  * Parameters:
  72  *   - cmd, the command we want to execute.
  73  *   - param0, param1, param2: the parameters used for this command.
  74  * Return:
  75  *   - Error code of the command (MC_FC_RET_OK in case of success).
  76  */
  77 static inline int mt_secure_call(uint32_t cmd, uint32_t param0, uint32_t param1, uint32_t param2)
  78 {
  79         /* SMC expect values in r0-r3 */
  80         register u32 reg0 __asm__("r0") = cmd;
  81         register u32 reg1 __asm__("r1") = param0;
  82         register u32 reg2 __asm__("r2") = param1;
  83         register u32 reg3 __asm__("r3") = param2;
  84         int ret = 0;
  85
  86         __asm__ volatile (
  87 #ifdef MC_ARCH_EXTENSION_SEC
  88                 /* This pseudo op is supported and required from
  89                  * binutils 2.21 on */
  90                 ".arch_extension sec\n"
  91 #endif
  92                 "smc 0\n"
  93                 : "+r"(reg0), "+r"(reg1), "+r"(reg2), "+r"(reg3)
  94         );
  95
  96         /* set response */
  97         ret = reg0;
  98         return ret;
  99 }
 100
 101
 102 #endif /* _MT_SECURE_API_H_ */