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31 ******************************************************************************/
32 /****************************************************************************/
37 * This file contains function for initiating SMC call
40 * MODIFICATION HISTORY:
42 * Ver Who Date Changes
43 * ----- -------- -------- -----------------------------------------------
44 * 6.2 pkp 02/16/17 First release
47 *****************************************************************************/
49 /***************************** Include Files ********************************/
50 #include "xil_types.h"
54 /************************** Constant Definitions ****************************/
56 /**************************** Type Definitions ******************************/
58 /***************** Macros (Inline Functions) Definitions ********************/
60 /************************** Function Prototypes *****************************/
62 /************************** Variable Definitions *****************************/
63 XSmc_OutVar SmcResult;
65 /*****************************************************************************/
67 * @brief Initiate SMC call to EL3 secure monitor to request for secure
68 * service. This function is only applicable for EL1 Non-secure bsp.
70 * @param FunctionID is the SMC identifier for a particular secure service
72 * @param Arg1 to Arg6 is the arguements passed to EL3 secure monitor
73 * @param Arg7 is Hypervisor Client ID register
75 * @return Result from secure payload service
76 * @note FunctionID and Arg1-Arg7 should be as per SMC calling convention
78 ******************************************************************************/
79 XSmc_OutVar Xil_Smc(u64 FunctionID, u64 Arg1, u64 Arg2, u64 Arg3, u64 Arg4,
80 u64 Arg5, u64 Arg6, u64 Arg7){
83 * Since registers x8 to x17 are not saved by secure monitor during SMC
84 * it must be preserved.
88 /* Moving to EL3 secure monitor with smc call. */
90 __asm__ __volatile__ ("smc #0x0");
93 * The result of the secure services are stored in x0 - x3. They are
94 * moved to SmcResult to return the result.
96 __asm__ __volatile__("mov x8, x0");
97 __asm__ __volatile__("mov x9, x1");
98 __asm__ __volatile__("mov x10, x2");
99 __asm__ __volatile__("mov x11, x3");
101 __asm__ __volatile__("mov %0, x8" : "=r" (SmcResult.Arg0));
102 __asm__ __volatile__("mov %0, x9" : "=r" (SmcResult.Arg1));
103 __asm__ __volatile__("mov %0, x10" : "=r" (SmcResult.Arg2));
104 __asm__ __volatile__("mov %0, x11" : "=r" (SmcResult.Arg3));