1 files changed, 148 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/io.h b/arch/xtensa/include/asm/io.h
new file mode 100644
index 0000000000..e34d6e1d7f
--- /dev/null
+++ b/arch/xtensa/include/asm/io.h
@@ -0,0 +1,148 @@
+/*
+ * IO header file
+ *
+ * Copyright (C) 2001-2007 Tensilica Inc.
+ * Based on the Linux/Xtensa version of this header.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _XTENSA_IO_H
+#define _XTENSA_IO_H
+
+#include <linux/types.h>
+#include <asm/byteorder.h>
+
+/*
+ * swap functions to change byte order from little-endian to big-endian and
+ * vice versa.
+ */
+
+static inline unsigned short _swapw(unsigned short v)
+{
+	return (v << 8) | (v >> 8);
+}
+
+static inline unsigned int _swapl(unsigned int v)
+{
+	return (v << 24) | ((v & 0xff00) << 8) |
+		((v >> 8) & 0xff00) | (v >> 24);
+}
+
+/*
+ * Generic I/O
+ */
+
+#define readb(addr) \
+	({ unsigned char __v = (*(volatile unsigned char *)(addr)); __v; })
+#define readw(addr) \
+	({ unsigned short __v = (*(volatile unsigned short *)(addr)); __v; })
+#define readl(addr) \
+	({ unsigned int __v = (*(volatile unsigned int *)(addr)); __v; })
+#define writeb(b, addr) (void)((*(volatile unsigned char *)(addr)) = (b))
+#define writew(b, addr) (void)((*(volatile unsigned short *)(addr)) = (b))
+#define writel(b, addr) (void)((*(volatile unsigned int *)(addr)) = (b))
+
+#define __raw_readb readb
+#define __raw_readw readw
+#define __raw_readl readl
+#define __raw_writeb writeb
+#define __raw_writew writew
+#define __raw_writel writel
+
+/* These are the definitions for the x86 IO instructions
+ * inb/inw/inl/outb/outw/outl, the "string" versions
+ * insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions
+ * inb_p/inw_p/...
+ * The macros don't do byte-swapping.
+ */
+
+#define inb(port)		readb((u8 *)((port)))
+#define outb(val, port)		writeb((val), (u8 *)((unsigned long)(port)))
+#define inw(port)		readw((u16 *)((port)))
+#define outw(val, port)		writew((val), (u16 *)((unsigned long)(port)))
+#define inl(port)		readl((u32 *)((port)))
+#define outl(val, port)		writel((val), (u32 *)((unsigned long)(port)))
+
+#define inb_p(port)		inb((port))
+#define outb_p(val, port)	outb((val), (port))
+#define inw_p(port)		inw((port))
+#define outw_p(val, port)	outw((val), (port))
+#define inl_p(port)		inl((port))
+#define outl_p(val, port)	outl((val), (port))
+
+void insb(unsigned long port, void *dst, unsigned long count);
+void insw(unsigned long port, void *dst, unsigned long count);
+void insl(unsigned long port, void *dst, unsigned long count);
+void outsb(unsigned long port, const void *src, unsigned long count);
+void outsw(unsigned long port, const void *src, unsigned long count);
+void outsl(unsigned long port, const void *src, unsigned long count);
+
+#define IO_SPACE_LIMIT ~0
+
+#define memset_io(a, b, c)	memset((void *)(a), (b), (c))
+#define memcpy_fromio(a, b, c)	memcpy((a), (void *)(b), (c))
+#define memcpy_toio(a, b, c)	memcpy((void *)(a), (b), (c))
+
+/* At this point the Xtensa doesn't provide byte swap instructions */
+
+#ifdef __XTENSA_EB__
+# define in_8(addr) (*(u8 *)(addr))
+# define in_le16(addr) _swapw(*(u16 *)(addr))
+# define in_le32(addr) _swapl(*(u32 *)(addr))
+# define out_8(b, addr) *(u8 *)(addr) = (b)
+# define out_le16(b, addr) *(u16 *)(addr) = _swapw(b)
+# define out_le32(b, addr) *(u32 *)(addr) = _swapl(b)
+#elif defined(__XTENSA_EL__)
+# define in_8(addr)  (*(u8 *)(addr))
+# define in_le16(addr) (*(u16 *)(addr))
+# define in_le32(addr) (*(u32 *)(addr))
+# define out_8(b, addr) *(u8 *)(addr) = (b)
+# define out_le16(b, addr) *(u16 *)(addr) = (b)
+# define out_le32(b, addr) *(u32 *)(addr) = (b)
+#else
+# error processor byte order undefined!
+#endif
+
+
+/*
+ * Convert a physical pointer to a virtual kernel pointer for /dev/mem access
+ */
+#define xlate_dev_mem_ptr(p)    __va(p)
+
+/*
+ * Convert a virtual cached pointer to an uncached pointer
+ */
+#define xlate_dev_kmem_ptr(p)   p
+
+#define MAP_NOCACHE	(0)
+#define MAP_WRCOMBINE	(0)
+#define MAP_WRBACK	(0)
+#define MAP_WRTHROUGH	(0)
+
+static inline void *
+map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
+{
+	return (void *)paddr;
+}
+
+/*
+ * Take down a mapping set up by map_physmem().
+ */
+static inline void unmap_physmem(void *vaddr, unsigned long flags)
+{
+}
+
+static inline phys_addr_t virt_to_phys(void *vaddr)
+{
+	return (phys_addr_t)((unsigned long)vaddr);
+}
+
+/*
+ * Dummy function to keep U-Boot's cfi_flash.c driver happy.
+ */
+static inline void sync(void)
+{
+}
+
+#endif	/* _XTENSA_IO_H */