better, not done

bsp_z7/lwip/port/sys_arch_raw.c

@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (C) 2007 - 2022 Xilinx, Inc.
+ * Copyright (C) 2022 - 2024 Advanced Micro Devices, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ */
+
+#include "xlwipconfig.h"
+
+#ifdef __MICROBLAZE__
+#include "mb_interface.h"
+#endif
+
+#ifdef __riscv
+#include "riscv_interface.h"
+#endif
+
+#include "arch/cc.h"
+#include "lwip/sys.h"
+
+/*
+ * This optional function does a "fast" critical region protection and returns
+ * the previous protection level. This function is only called during very short
+ * critical regions. An embedded system which supports ISR-based drivers might
+ * want to implement this function by disabling interrupts. Task-based systems
+ * might want to implement this by using a mutex or disabling tasking. This
+ * function should support recursive calls from the same task or interrupt. In
+ * other words, sys_arch_protect() could be called while already protected. In
+ * that case the return value indicates that it is already protected.
+ * sys_arch_protect() is only required if your port is supporting an operating
+ * system.
+ */
+sys_prot_t
+sys_arch_protect()
+{
+	sys_prot_t cur;
+#ifdef __MICROBLAZE__
+	cur = mfmsr();
+	mtmsr(cur & ~0x2);
+#elif __arm__
+	cur = mfcpsr();
+	mtcpsr(cur | 0xC0);
+#elif __aarch64__
+	cur = mfcpsr();
+	mtcpsr(cur | 0xC0);
+#endif
+	return cur;
+}
+
+/*
+ * This optional function does a "fast" set of critical region protection to the
+ * value specified by pval. See the documentation for sys_arch_protect() for
+ * more information. This function is only required if your port is supporting
+ * an operating system.
+ */
+void
+sys_arch_unprotect(sys_prot_t lev)
+{
+#if defined (__arm__) || defined (__aarch64__)
+	mtcpsr(lev);
+#else
+	mtmsr(lev);
+#endif
+}