zynqmp: Add support to provide silicon id through SMC

Add support to provide silicon id to non-secure
software through SMC.
Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>

[ sb
Move zynqmp_get_silicon_id outside of compile guards to avoid build
errors.
]
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>

plat/xilinx/zynqmp/aarch64/zynqmp_common.c

@@ -90,6 +90,18 @@ static unsigned int zynqmp_get_system_timer_freq(void)
 	return 100000000;
 }
 
+unsigned int zynqmp_get_silicon_id(void)
+{
+	uint32_t id;
+
+	id = mmio_read_32(ZYNQMP_CSU_BASEADDR + ZYNQMP_CSU_IDCODE_OFFSET);
+
+	id &= ZYNQMP_CSU_IDCODE_DEVICE_CODE_MASK | ZYNQMP_CSU_IDCODE_SVD_MASK;
+	id >>= ZYNQMP_CSU_IDCODE_SVD_SHIFT;
+
+	return id;
+}
+
 #if LOG_LEVEL >= LOG_LEVEL_NOTICE
 static const struct {
 	unsigned int id;
@@ -141,18 +153,6 @@ static const struct {
 	},
 };
 
-static unsigned int zynqmp_get_silicon_id(void)
-{
-	uint32_t id;
-
-	id = mmio_read_32(ZYNQMP_CSU_BASEADDR + ZYNQMP_CSU_IDCODE_OFFSET);
-
-	id &= ZYNQMP_CSU_IDCODE_DEVICE_CODE_MASK | ZYNQMP_CSU_IDCODE_SVD_MASK;
-	id >>= ZYNQMP_CSU_IDCODE_SVD_SHIFT;
-
-	return id;
-}
-
 static char *zynqmp_get_silicon_idcode_name(void)
 {
 	unsigned int id;

plat/xilinx/zynqmp/pm_service/pm_defs.h

@@ -89,6 +89,7 @@ enum pm_api_id {
 	PM_INIT,
 	PM_FPGA_LOAD,
 	PM_FPGA_GET_STATUS,
+	PM_GET_CHIPID,
 	PM_API_MAX
 };
 

plat/xilinx/zynqmp/pm_service/pm_svc_main.c

@@ -241,6 +241,9 @@ uint64_t pm_smc_handler(uint32_t smc_fid, uint64_t x1, uint64_t x2, uint64_t x3,
 		SMC_RET1(handle, (uint64_t)ret | ((uint64_t)value) << 32);
 	}
 
+	case PM_GET_CHIPID:
+		SMC_RET1(handle, zynqmp_get_silicon_id());
+
 	default:
 		WARN("Unimplemented PM Service Call: 0x%x\n", smc_fid);
 		SMC_RET1(handle, SMC_UNK);

plat/xilinx/zynqmp/zynqmp_private.h

@@ -39,6 +39,7 @@ void zynqmp_config_setup(void);
 unsigned int zynqmp_get_uart_clk(void);
 int zynqmp_is_pmu_up(void);
 unsigned int zynqmp_get_bootmode(void);
+unsigned int zynqmp_get_silicon_id(void);
 
 /* For FSBL handover */
 void fsbl_atf_handover(entry_point_info_t *bl32_image_ep_info,