--- /dev/null
+/******************************************************************************
+*
+* Copyright (C) 2015-2016 Xilinx, Inc. All rights reserved.
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy
+* of this software and associated documentation files (the "Software"), to deal
+* in the Software without restriction, including without limitation the rights
+* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+* copies of the Software, and to permit persons to whom the Software is
+* furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
+*
+* Use of the Software is limited solely to applications:
+* (a) running on a Xilinx device, or
+* (b) that interact with a Xilinx device through a bus or interconnect.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+* XILINX BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
+* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+* SOFTWARE.
+*
+* Except as contained in this notice, the name of the Xilinx shall not be used
+* in advertising or otherwise to promote the sale, use or other dealings in
+* this Software without prior written authorization from Xilinx.
+*
+******************************************************************************/
+/*****************************************************************************/
+/**
+*
+* @file xcoresightpsdcc.c
+* @addtogroup coresightps_dcc_v1_4
+* @{
+*
+* Functions in this file are the minimum required functions for the
+* XCoreSightPs driver.
+*
+* @note None.
+*
+*
+* <pre>
+* MODIFICATION HISTORY:
+*
+* Ver Who Date Changes
+* ----- ----- -------- -----------------------------------------------
+* 1.00 kvn 02/14/15 First release
+* 1.1 kvn 06/12/15 Add support for Zynq Ultrascale+ MP.
+* kvn 08/18/15 Modified Makefile according to compiler changes.
+* 1.2 kvn 10/09/15 Add support for IAR Compiler.
+* 1.3 asa 07/01/16 Made changes to ensure that the file does not compile
+* for MB BSPs. Instead it throws up a warning. This
+* fixes the CR#953056.
+*
+* </pre>
+*
+******************************************************************************/
+
+/***************************** Include Files *********************************/
+#ifdef __MICROBLAZE__
+#warning "The driver is supported only for ARM architecture"
+#else
+
+#include <xil_types.h>
+#include <xpseudo_asm.h>
+
+#ifdef __ICCARM__
+#define INLINE
+#else
+#define INLINE __inline
+#endif
+
+/* DCC Status Bits */
+#define XCORESIGHTPS_DCC_STATUS_RX (1 << 30)
+#define XCORESIGHTPS_DCC_STATUS_TX (1 << 29)
+
+static INLINE u32 XCoresightPs_DccGetStatus(void);
+
+/****************************************************************************/
+/**
+*
+* This functions sends a single byte using the DCC. It is blocking in that it
+* waits for the transmitter to become non-full before it writes the byte to
+* the transmit register.
+*
+* @param BaseAddress is a dummy parameter to match the function proto
+* of functions for other stdio devices.
+* @param Data is the byte of data to send
+*
+* @return None.
+*
+* @note None.
+*
+******************************************************************************/
+void XCoresightPs_DccSendByte(u32 BaseAddress, u8 Data)
+{
+ (void) BaseAddress;
+ while (XCoresightPs_DccGetStatus() & XCORESIGHTPS_DCC_STATUS_TX)
+ dsb();
+#ifdef __aarch64__
+ asm volatile ("msr dbgdtrtx_el0, %0" : : "r" (Data));
+#elif defined (__GNUC__) || defined (__ICCARM__)
+ asm volatile("mcr p14, 0, %0, c0, c5, 0"
+ : : "r" (Data));
+#else
+ {
+ volatile register u32 Reg __asm("cp14:0:c0:c5:0");
+ Reg = Data;
+ }
+#endif
+ isb();
+
+}
+
+/****************************************************************************/
+/**
+*
+* This functions receives a single byte using the DCC. It is blocking in that
+* it waits for the receiver to become non-empty before it reads from the
+* receive register.
+*
+* @param BaseAddress is a dummy parameter to match the function proto
+* of functions for other stdio devices.
+*
+* @return The byte of data received.
+*
+* @note None.
+*
+******************************************************************************/
+u8 XCoresightPs_DccRecvByte(u32 BaseAddress)
+{
+ u8 Data = 0U;
+ (void) BaseAddress;
+
+ while (!(XCoresightPs_DccGetStatus() & XCORESIGHTPS_DCC_STATUS_RX))
+ dsb();
+
+#ifdef __aarch64__
+ asm volatile ("mrs %0, dbgdtrrx_el0" : "=r" (Data));
+#elif defined (__GNUC__) || defined (__ICCARM__)
+ asm volatile("mrc p14, 0, %0, c0, c5, 0"
+ : "=r" (Data));
+#else
+ {
+ volatile register u32 Reg __asm("cp14:0:c0:c5:0");
+ Data = Reg;
+ }
+#endif
+ isb();
+
+ return Data;
+}
+
+
+/****************************************************************************/
+/**INLINE
+*
+* This functions read the status register of the DCC.
+*
+* @param BaseAddress is the base address of the device
+*
+* @return The contents of the Status Register.
+*
+* @note None.
+*
+******************************************************************************/
+static INLINE u32 XCoresightPs_DccGetStatus(void)
+{
+ u32 Status = 0U;
+
+#ifdef __aarch64__
+ asm volatile ("mrs %0, mdccsr_el0" : "=r" (Status));
+#elif defined (__GNUC__) || defined (__ICCARM__)
+ asm volatile("mrc p14, 0, %0, c0, c1, 0"
+ : "=r" (Status) : : "cc");
+#else
+ {
+ volatile register u32 Reg __asm("cp14:0:c0:c1:0");
+ Status = Reg;
+ }
+#endif
+ return Status;
+#endif
+}
+/** @} */
projects / freertos / blobdiff