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-rw-r--r--arch/nios2/include/asm/io.h130
1 files changed, 130 insertions, 0 deletions
diff --git a/arch/nios2/include/asm/io.h b/arch/nios2/include/asm/io.h
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+++ b/arch/nios2/include/asm/io.h
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+/*
+ * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef __ASM_NIOS2_IO_H_
+#define __ASM_NIOS2_IO_H_
+
+static inline void sync(void)
+{
+ __asm__ __volatile__ ("sync" : : : "memory");
+}
+
+/*
+ * Given a physical address and a length, return a virtual address
+ * that can be used to access the memory range with the caching
+ * properties specified by "flags".
+ */
+#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)(vaddr);
+}
+
+extern unsigned char inb (unsigned char *port);
+extern unsigned short inw (unsigned short *port);
+extern unsigned inl (unsigned port);
+
+#define __raw_writeb(v,a) (*(volatile unsigned char *)(a) = (v))
+#define __raw_writew(v,a) (*(volatile unsigned short *)(a) = (v))
+#define __raw_writel(v,a) (*(volatile unsigned int *)(a) = (v))
+
+#define __raw_readb(a) (*(volatile unsigned char *)(a))
+#define __raw_readw(a) (*(volatile unsigned short *)(a))
+#define __raw_readl(a) (*(volatile unsigned int *)(a))
+
+#define readb(addr)\
+ ({unsigned char val;\
+ asm volatile( "ldbio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;})
+#define readw(addr)\
+ ({unsigned short val;\
+ asm volatile( "ldhio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;})
+#define readl(addr)\
+ ({unsigned long val;\
+ asm volatile( "ldwio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;})
+
+#define writeb(val,addr)\
+ asm volatile ("stbio %0, 0(%1)" : : "r" (val), "r" (addr))
+#define writew(val,addr)\
+ asm volatile ("sthio %0, 0(%1)" : : "r" (val), "r" (addr))
+#define writel(val,addr)\
+ asm volatile ("stwio %0, 0(%1)" : : "r" (val), "r" (addr))
+
+#define inb(addr) readb(addr)
+#define inw(addr) readw(addr)
+#define inl(addr) readl(addr)
+#define outb(val, addr) writeb(val,addr)
+#define outw(val, addr) writew(val,addr)
+#define outl(val, addr) writel(val,addr)
+
+static inline void insb (unsigned long port, void *dst, unsigned long count)
+{
+ unsigned char *p = dst;
+ while (count--) *p++ = inb (port);
+}
+static inline void insw (unsigned long port, void *dst, unsigned long count)
+{
+ unsigned short *p = dst;
+ while (count--) *p++ = inw (port);
+}
+static inline void insl (unsigned long port, void *dst, unsigned long count)
+{
+ unsigned long *p = dst;
+ while (count--) *p++ = inl (port);
+}
+
+static inline void outsb (unsigned long port, const void *src, unsigned long count)
+{
+ const unsigned char *p = src;
+ while (count--) outb (*p++, port);
+}
+
+static inline void outsw (unsigned long port, const void *src, unsigned long count)
+{
+ const unsigned short *p = src;
+ while (count--) outw (*p++, port);
+}
+static inline void outsl (unsigned long port, const void *src, unsigned long count)
+{
+ const unsigned long *p = src;
+ while (count--) outl (*p++, port);
+}
+
+#endif /* __ASM_NIOS2_IO_H_ */