GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/arch/mips/mach-mscc/include/ioremap.h

@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
+/*
+ * Copyright (c) 2018 Microsemi Corporation
+ */
+
+#ifndef __ASM_MACH_MSCC_IOREMAP_H
+#define __ASM_MACH_MSCC_IOREMAP_H
+
+#include <linux/types.h>
+#include <mach/common.h>
+
+/*
+ * Allow physical addresses to be fixed up to help peripherals located
+ * outside the low 32-bit range -- generic pass-through version.
+ */
+static inline phys_addr_t fixup_bigphys_addr(phys_addr_t phys_addr,
+					     phys_addr_t size)
+{
+	return phys_addr;
+}
+
+static inline int is_vcoreiii_internal_registers(phys_addr_t offset)
+{
+	if ((offset >= MSCC_IO_ORIGIN1_OFFSET &&
+	     offset < (MSCC_IO_ORIGIN1_OFFSET + MSCC_IO_ORIGIN1_SIZE)) ||
+	    (offset >= MSCC_IO_ORIGIN2_OFFSET &&
+	     offset < (MSCC_IO_ORIGIN2_OFFSET + MSCC_IO_ORIGIN2_SIZE)))
+		return 1;
+
+	return 0;
+}
+
+static inline void __iomem *plat_ioremap(phys_addr_t offset, unsigned long size,
+					 unsigned long flags)
+{
+	if (is_vcoreiii_internal_registers(offset))
+		return (void __iomem *)offset;
+
+	return NULL;
+}
+
+static inline int plat_iounmap(const volatile void __iomem *addr)
+{
+	return is_vcoreiii_internal_registers((unsigned long)addr);
+}
+
+#define _page_cachable_default	_CACHE_CACHABLE_NONCOHERENT
+
+#endif				/* __ASM_MACH_MSCC_IOREMAP_H */