zynqmp : pm : Adds new zynqmp-pm api SMC call for register access
This patch adds new zynqmp-pm api to provide read/write access to
CSU or PMU global registers.
Signed-off-by: Kalyani Akula <kalyania@xilinx.com>
Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Change-Id: I4fd52eb732fc3e6a8bccd96cad7dc090b2161042
diff --git a/plat/xilinx/zynqmp/pm_service/pm_api_sys.c b/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
index 1ec06f9..9a1f1b4 100644
--- a/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
+++ b/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
@@ -1546,3 +1546,48 @@
PM_PACK_PAYLOAD2(payload, PM_PLL_GET_MODE, nid);
return pm_ipi_send_sync(primary_proc, payload, mode, 1);
}
+
+/**
+ * pm_register_access() - PM API for register read/write access data
+ *
+ * @register_access_id Register_access_id which says register read/write
+ *
+ * @address Address of the register to be accessed
+ *
+ * @mask Mask value to be used while writing value
+ *
+ * @value Value to be written to register
+ *
+ * @out Returned output data
+ *
+ * This function returns requested data.
+ *
+ * @return Returns status, either success or error+reason
+ */
+enum pm_ret_status pm_register_access(unsigned int register_access_id,
+ unsigned int address,
+ unsigned int mask,
+ unsigned int value,
+ unsigned int *out)
+{
+ enum pm_ret_status ret;
+
+ if (((ZYNQMP_CSU_BASEADDR & address) != ZYNQMP_CSU_BASEADDR) &&
+ ((CSUDMA_BASE & address) != CSUDMA_BASE) &&
+ ((RSA_CORE_BASE & address) != RSA_CORE_BASE) &&
+ ((PMU_GLOBAL_BASE & address) != PMU_GLOBAL_BASE))
+ return PM_RET_ERROR_ACCESS;
+
+ switch (register_access_id) {
+ case CONFIG_REG_WRITE:
+ ret = pm_mmio_write(address, mask, value);
+ break;
+ case CONFIG_REG_READ:
+ ret = pm_mmio_read(address, out);
+ break;
+ default:
+ ret = PM_RET_ERROR_ARGS;
+ WARN("Unimplemented register_access call\n\r");
+ }
+ return ret;
+}