1 files changed, 207 insertions, 0 deletions

diff --git a/include/asm-blackfin/io.h b/include/asm-blackfin/io.h
new file mode 100644
index 000000000000..7e6995e80d97
--- /dev/null
+++ b/include/asm-blackfin/io.h
@@ -0,0 +1,207 @@
+#ifndef _BFIN_IO_H
+#define _BFIN_IO_H
+
+#ifdef __KERNEL__
+
+#ifndef __ASSEMBLY__
+#include <linux/types.h>
+#endif
+#include <linux/compiler.h>
+
+/*
+ * 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 bfin architecture, we just read/write the
+ * memory location directly.
+ */
+#ifndef __ASSEMBLY__
+
+static inline unsigned char readb(void __iomem *addr)
+{
+        unsigned int val;
+        int tmp;
+
+        __asm__ __volatile__ ("cli %1;\n\t"
+                        "NOP; NOP; SSYNC;\n\t"
+                        "%0 = b [%2] (z);\n\t"
+                        "sti %1;\n\t"
+                        : "=d"(val), "=d"(tmp): "a"(addr)
+                        );
+
+        return (unsigned char) val;
+}
+
+static inline unsigned short readw(void __iomem *addr)
+{
+        unsigned int val;
+        int tmp;
+
+        __asm__ __volatile__ ("cli %1;\n\t"
+                        "NOP; NOP; SSYNC;\n\t"
+                        "%0 = w [%2] (z);\n\t"
+                        "sti %1;\n\t"
+                        : "=d"(val), "=d"(tmp): "a"(addr)
+                        );
+
+        return (unsigned short) val;
+}
+
+static inline unsigned int readl(void __iomem *addr)
+{
+        unsigned int val;
+        int tmp;
+
+        __asm__ __volatile__ ("cli %1;\n\t"
+                        "NOP; NOP; SSYNC;\n\t"
+                        "%0 = [%2];\n\t"
+                        "sti %1;\n\t"
+                        : "=d"(val), "=d"(tmp): "a"(addr)
+                        );
+        return val;
+}
+
+#endif /*  __ASSEMBLY__ */
+
+#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
+#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 inb(addr)    readb(addr)
+#define inw(addr)    readw(addr)
+#define inl(addr)    readl(addr)
+#define outb(x,addr) ((void) writeb(x,addr))
+#define outw(x,addr) ((void) writew(x,addr))
+#define outl(x,addr) ((void) writel(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 ioread8_rep(a,d,c)      insb(a,d,c)
+#define ioread16_rep(a,d,c)     insw(a,d,c)
+#define ioread32_rep(a,d,c)     insl(a,d,c)
+#define iowrite8_rep(a,s,c)     outsb(a,s,c)
+#define iowrite16_rep(a,s,c)    outsw(a,s,c)
+#define iowrite32_rep(a,s,c)    outsl(a,s,c)
+
+#define ioread8(X)                      readb(X)
+#define ioread16(X)                     readw(X)
+#define ioread32(X)                     readl(X)
+#define iowrite8(val,X)                 writeb(val,X)
+#define iowrite16(val,X)                writew(val,X)
+#define iowrite32(val,X)                writel(val,X)
+
+#define IO_SPACE_LIMIT 0xffffffff
+
+/* Values for nocacheflag and cmode */
+#define IOMAP_NOCACHE_SER               1
+
+#ifndef __ASSEMBLY__
+
+extern void outsb(void __iomem *port, const void *addr, unsigned long count);
+extern void outsw(void __iomem *port, const void *addr, unsigned long count);
+extern void outsl(void __iomem *port, const void *addr, unsigned long count);
+
+extern void insb(const void __iomem *port, void *addr, unsigned long count);
+extern void insw(const void __iomem *port, void *addr, unsigned long count);
+extern void insl(const void __iomem *port, void *addr, unsigned long count);
+
+/*
+ * Map some physical address range into the kernel address space.
+ */
+static inline void __iomem *__ioremap(unsigned long physaddr, unsigned long size,
+                                int cacheflag)
+{
+        return (void __iomem *)physaddr;
+}
+
+/*
+ * Unmap a ioremap()ed region again
+ */
+static inline void iounmap(void *addr)
+{
+}
+
+/*
+ * __iounmap unmaps nearly everything, so be careful
+ * it doesn't free currently pointer/page tables anymore but it
+ * wans't used anyway and might be added later.
+ */
+static inline void __iounmap(void *addr, unsigned long size)
+{
+}
+
+/*
+ * Set new cache mode for some kernel address space.
+ * The caller must push data for that range itself, if such data may already
+ * be in the cache.
+ */
+static inline void kernel_set_cachemode(void *addr, unsigned long size,
+                                        int cmode)
+{
+}
+
+static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size)
+{
+        return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
+}
+static inline void __iomem *ioremap_nocache(unsigned long physaddr,
+                                            unsigned long size)
+{
+        return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
+}
+
+extern void blkfin_inv_cache_all(void);
+
+#endif
+
+#define ioport_map(port, nr)            ((void __iomem*)(port))
+#define ioport_unmap(addr)
+
+#define dma_cache_inv(_start,_size) do { blkfin_inv_cache_all();} while (0)
+#define dma_cache_wback(_start,_size) do { } while (0)
+#define dma_cache_wback_inv(_start,_size) do { blkfin_inv_cache_all();} while (0)
+
+/* Pages to physical address... */
+#define page_to_phys(page)      ((page - mem_map) << PAGE_SHIFT)
+#define page_to_bus(page)       ((page - mem_map) << PAGE_SHIFT)
+
+#define mm_ptov(vaddr)          ((void *) (vaddr))
+#define mm_vtop(vaddr)          ((unsigned long) (vaddr))
+#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                          /* _BFIN_IO_H */