1 files changed, 324 insertions, 0 deletions

diff --git a/arch/h8300/include/asm/io.h b/arch/h8300/include/asm/io.h
new file mode 100644
index 000000000000..26dc6ccd9441
--- /dev/null
+++ b/arch/h8300/include/asm/io.h
@@ -0,0 +1,324 @@
+#ifndef _H8300_IO_H
+#define _H8300_IO_H
+
+#ifdef __KERNEL__
+
+#include <asm/virtconvert.h>
+
+#if defined(CONFIG_H83007) || defined(CONFIG_H83068)
+#include <asm/regs306x.h>
+#elif defined(CONFIG_H8S2678)
+#include <asm/regs267x.h>
+#else
+#error UNKNOWN CPU TYPE
+#endif
+
+
+/*
+ * These are for ISA/PCI shared memory _only_ and should never be used
+ * on any other type of memory, including Zorro memory. They are meant to
+ * access the bus in the bus byte order which is little-endian!.
+ *
+ * readX/writeX() are used to access memory mapped devices. On some
+ * architectures the memory mapped IO stuff needs to be accessed
+ * differently. On the m68k architecture, we just read/write the
+ * memory location directly.
+ */
+/* ++roman: The assignments to temp. vars avoid that gcc sometimes generates
+ * two accesses to memory, which may be undesireable for some devices.
+ */
+
+/*
+ * swap functions are sometimes needed to interface little-endian hardware
+ */
+
+static inline unsigned short _swapw(volatile unsigned short v)
+{
+#ifndef H8300_IO_NOSWAP
+        unsigned short r;
+        __asm__("xor.b %w0,%x0\n\t"
+                "xor.b %x0,%w0\n\t"
+                "xor.b %w0,%x0"
+                :"=r"(r)
+                :"0"(v));
+        return r;
+#else
+        return v;
+#endif
+}
+
+static inline unsigned long _swapl(volatile unsigned long v)
+{
+#ifndef H8300_IO_NOSWAP
+        unsigned long r;
+        __asm__("xor.b %w0,%x0\n\t"
+                "xor.b %x0,%w0\n\t"
+                "xor.b %w0,%x0\n\t"
+                "xor.w %e0,%f0\n\t"
+                "xor.w %f0,%e0\n\t"
+                "xor.w %e0,%f0\n\t"
+                "xor.b %w0,%x0\n\t"
+                "xor.b %x0,%w0\n\t"
+                "xor.b %w0,%x0"
+                :"=r"(r)
+                :"0"(v));
+        return r;
+#else
+        return v;
+#endif
+}
+
+#define readb(addr) \
+    ({ unsigned char __v = \
+     *(volatile unsigned char *)((unsigned long)(addr) & 0x00ffffff); \
+     __v; })
+#define readw(addr) \
+    ({ unsigned short __v = \
+     *(volatile unsigned short *)((unsigned long)(addr) & 0x00ffffff); \
+     __v; })
+#define readl(addr) \
+    ({ unsigned long __v = \
+     *(volatile unsigned long *)((unsigned long)(addr) & 0x00ffffff); \
+     __v; })
+
+#define writeb(b,addr) (void)((*(volatile unsigned char *) \
+                             ((unsigned long)(addr) & 0x00ffffff)) = (b))
+#define writew(b,addr) (void)((*(volatile unsigned short *) \
+                             ((unsigned long)(addr) & 0x00ffffff)) = (b))
+#define writel(b,addr) (void)((*(volatile unsigned long *) \
+                             ((unsigned long)(addr) & 0x00ffffff)) = (b))
+#define readb_relaxed(addr) readb(addr)
+#define readw_relaxed(addr) readw(addr)
+#define readl_relaxed(addr) readl(addr)
+
+#define __raw_readb readb
+#define __raw_readw readw
+#define __raw_readl readl
+#define __raw_writeb writeb
+#define __raw_writew writew
+#define __raw_writel writel
+
+static inline int h8300_buswidth(unsigned int addr)
+{
+        return (*(volatile unsigned char *)ABWCR & (1 << ((addr >> 21) & 7))) == 0;
+}
+
+static inline void io_outsb(unsigned int addr, const void *buf, int len)
+{
+        volatile unsigned char  *ap_b = (volatile unsigned char *) addr;
+        volatile unsigned short *ap_w = (volatile unsigned short *) addr;
+        unsigned char *bp = (unsigned char *) buf;
+
+        if(h8300_buswidth(addr) && (addr & 1)) {
+                while (len--)
+                        *ap_w = *bp++;
+        } else {
+                while (len--)
+                        *ap_b = *bp++;
+        }
+}
+
+static inline void io_outsw(unsigned int addr, const void *buf, int len)
+{
+        volatile unsigned short *ap = (volatile unsigned short *) addr;
+        unsigned short *bp = (unsigned short *) buf;
+        while (len--)
+                *ap = _swapw(*bp++);
+}
+
+static inline void io_outsl(unsigned int addr, const void *buf, int len)
+{
+        volatile unsigned long *ap = (volatile unsigned long *) addr;
+        unsigned long *bp = (unsigned long *) buf;
+        while (len--)
+                *ap = _swapl(*bp++);
+}
+
+static inline void io_outsw_noswap(unsigned int addr, const void *buf, int len)
+{
+        volatile unsigned short *ap = (volatile unsigned short *) addr;
+        unsigned short *bp = (unsigned short *) buf;
+        while (len--)
+                *ap = *bp++;
+}
+
+static inline void io_outsl_noswap(unsigned int addr, const void *buf, int len)
+{
+        volatile unsigned long *ap = (volatile unsigned long *) addr;
+        unsigned long *bp = (unsigned long *) buf;
+        while (len--)
+                *ap = *bp++;
+}
+
+static inline void io_insb(unsigned int addr, void *buf, int len)
+{
+        volatile unsigned char  *ap_b;
+        volatile unsigned short *ap_w;
+        unsigned char *bp = (unsigned char *) buf;
+
+        if(h8300_buswidth(addr)) {
+                ap_w = (volatile unsigned short *)(addr & ~1);
+                while (len--)
+                        *bp++ = *ap_w & 0xff;
+        } else {
+                ap_b = (volatile unsigned char *)addr;
+                while (len--)
+                        *bp++ = *ap_b;
+        }
+}
+
+static inline void io_insw(unsigned int addr, void *buf, int len)
+{
+        volatile unsigned short *ap = (volatile unsigned short *) addr;
+        unsigned short *bp = (unsigned short *) buf;
+        while (len--)
+                *bp++ = _swapw(*ap);
+}
+
+static inline void io_insl(unsigned int addr, void *buf, int len)
+{
+        volatile unsigned long *ap = (volatile unsigned long *) addr;
+        unsigned long *bp = (unsigned long *) buf;
+        while (len--)
+                *bp++ = _swapl(*ap);
+}
+
+static inline void io_insw_noswap(unsigned int addr, void *buf, int len)
+{
+        volatile unsigned short *ap = (volatile unsigned short *) addr;
+        unsigned short *bp = (unsigned short *) buf;
+        while (len--)
+                *bp++ = *ap;
+}
+
+static inline void io_insl_noswap(unsigned int addr, void *buf, int len)
+{
+        volatile unsigned long *ap = (volatile unsigned long *) addr;
+        unsigned long *bp = (unsigned long *) buf;
+        while (len--)
+                *bp++ = *ap;
+}
+
+/*
+ *      make the short names macros so specific devices
+ *      can override them as required
+ */
+
+#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))
+
+#define mmiowb()
+
+#define inb(addr)    ((h8300_buswidth(addr))?readw((addr) & ~1) & 0xff:readb(addr))
+#define inw(addr)    _swapw(readw(addr))
+#define inl(addr)    _swapl(readl(addr))
+#define outb(x,addr) ((void)((h8300_buswidth(addr) && \
+                      ((addr) & 1))?writew(x,(addr) & ~1):writeb(x,addr)))
+#define outw(x,addr) ((void) writew(_swapw(x),addr))
+#define outl(x,addr) ((void) writel(_swapl(x),addr))
+
+#define inb_p(addr)    inb(addr)
+#define inw_p(addr)    inw(addr)
+#define inl_p(addr)    inl(addr)
+#define outb_p(x,addr) outb(x,addr)
+#define outw_p(x,addr) outw(x,addr)
+#define outl_p(x,addr) outl(x,addr)
+
+#define outsb(a,b,l) io_outsb(a,b,l)
+#define outsw(a,b,l) io_outsw(a,b,l)
+#define outsl(a,b,l) io_outsl(a,b,l)
+
+#define insb(a,b,l) io_insb(a,b,l)
+#define insw(a,b,l) io_insw(a,b,l)
+#define insl(a,b,l) io_insl(a,b,l)
+
+#define IO_SPACE_LIMIT 0xffffff
+
+
+/* Values for nocacheflag and cmode */
+#define IOMAP_FULL_CACHING              0
+#define IOMAP_NOCACHE_SER               1
+#define IOMAP_NOCACHE_NONSER            2
+#define IOMAP_WRITETHROUGH              3
+
+extern void *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag);
+extern void __iounmap(void *addr, unsigned long size);
+
+static inline void *ioremap(unsigned long physaddr, unsigned long size)
+{
+        return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
+}
+static inline void *ioremap_nocache(unsigned long physaddr, unsigned long size)
+{
+        return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
+}
+static inline void *ioremap_writethrough(unsigned long physaddr, unsigned long size)
+{
+        return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
+}
+static inline void *ioremap_fullcache(unsigned long physaddr, unsigned long size)
+{
+        return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
+}
+
+extern void iounmap(void *addr);
+
+/* H8/300 internal I/O functions */
+static __inline__ unsigned char ctrl_inb(unsigned long addr)
+{
+        return *(volatile unsigned char*)addr;
+}
+
+static __inline__ unsigned short ctrl_inw(unsigned long addr)
+{
+        return *(volatile unsigned short*)addr;
+}
+
+static __inline__ unsigned long ctrl_inl(unsigned long addr)
+{
+        return *(volatile unsigned long*)addr;
+}
+
+static __inline__ void ctrl_outb(unsigned char b, unsigned long addr)
+{
+        *(volatile unsigned char*)addr = b;
+}
+
+static __inline__ void ctrl_outw(unsigned short b, unsigned long addr)
+{
+        *(volatile unsigned short*)addr = b;
+}
+
+static __inline__ void ctrl_outl(unsigned long b, unsigned long addr)
+{
+        *(volatile unsigned long*)addr = b;
+}
+
+/* Pages to physical address... */
+#define page_to_phys(page)      ((page - mem_map) << PAGE_SHIFT)
+#define page_to_bus(page)       ((page - mem_map) << PAGE_SHIFT)
+
+/*
+ * Macros used for converting between virtual and physical mappings.
+ */
+#define phys_to_virt(vaddr)     ((void *) (vaddr))
+#define virt_to_phys(vaddr)     ((unsigned long) (vaddr))
+
+#define virt_to_bus virt_to_phys
+#define bus_to_virt phys_to_virt
+
+/*
+ * 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
+
+#endif /* __KERNEL__ */
+
+#endif /* _H8300_IO_H */