Initial import

1 files changed, 192 insertions, 0 deletions

diff --git a/arch/cris/include/asm/io.h b/arch/cris/include/asm/io.h
new file mode 100644
index 000000000..752a3f45d
--- /dev/null
+++ b/arch/cris/include/asm/io.h
@@ -0,0 +1,192 @@
+#ifndef _ASM_CRIS_IO_H
+#define _ASM_CRIS_IO_H
+
+#include <asm/page.h>   /* for __va, __pa */
+#include <arch/io.h>
+#include <asm-generic/iomap.h>
+#include <linux/kernel.h>
+
+struct cris_io_operations
+{
+	u32 (*read_mem)(void *addr, int size);
+	void (*write_mem)(u32 val, int size, void *addr);
+	u32 (*read_io)(u32 port, void *addr, int size, int count);
+	void (*write_io)(u32 port, void *addr, int size, int count);
+};
+
+#ifdef CONFIG_PCI
+extern struct cris_io_operations *cris_iops;
+#else
+#define cris_iops ((struct cris_io_operations*)NULL)
+#endif
+
+/*
+ * Change virtual addresses to physical addresses and vv.
+ */
+
+static inline unsigned long virt_to_phys(volatile void * address)
+{
+	return __pa(address);
+}
+
+static inline void * phys_to_virt(unsigned long address)
+{
+	return __va(address);
+}
+
+extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
+extern void __iomem * __ioremap_prot(unsigned long phys_addr, unsigned long size, pgprot_t prot);
+
+static inline void __iomem * ioremap (unsigned long offset, unsigned long size)
+{
+	return __ioremap(offset, size, 0);
+}
+
+extern void iounmap(volatile void * __iomem addr);
+
+extern void __iomem * ioremap_nocache(unsigned long offset, unsigned long size);
+
+/*
+ * IO bus memory addresses are also 1:1 with the physical address
+ */
+#define virt_to_bus virt_to_phys
+#define bus_to_virt phys_to_virt
+
+/*
+ * readX/writeX() are used to access memory mapped devices. On some
+ * architectures the memory mapped IO stuff needs to be accessed
+ * differently. On the CRIS architecture, we just read/write the
+ * memory location directly.
+ */
+#ifdef CONFIG_PCI
+#define PCI_SPACE(x) ((((unsigned)(x)) & 0x10000000) == 0x10000000)
+#else
+#define PCI_SPACE(x) 0
+#endif
+static inline unsigned char readb(const volatile void __iomem *addr)
+{
+	if (PCI_SPACE(addr) && cris_iops)
+		return cris_iops->read_mem((void*)addr, 1);
+	else
+		return *(volatile unsigned char __force *) addr;
+}
+static inline unsigned short readw(const volatile void __iomem *addr)
+{
+	if (PCI_SPACE(addr) && cris_iops)
+		return cris_iops->read_mem((void*)addr, 2);
+	else
+		return *(volatile unsigned short __force *) addr;
+}
+static inline unsigned int readl(const volatile void __iomem *addr)
+{
+	if (PCI_SPACE(addr) && cris_iops)
+		return cris_iops->read_mem((void*)addr, 4);
+	else
+		return *(volatile unsigned int __force *) addr;
+}
+#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
+
+static inline void writeb(unsigned char b, volatile void __iomem *addr)
+{
+	if (PCI_SPACE(addr) && cris_iops)
+		cris_iops->write_mem(b, 1, (void*)addr);
+	else
+		*(volatile unsigned char __force *) addr = b;
+}
+static inline void writew(unsigned short b, volatile void __iomem *addr)
+{
+	if (PCI_SPACE(addr) && cris_iops)
+		cris_iops->write_mem(b, 2, (void*)addr);
+	else
+		*(volatile unsigned short __force *) addr = b;
+}
+static inline void writel(unsigned int b, volatile void __iomem *addr)
+{
+	if (PCI_SPACE(addr) && cris_iops)
+		cris_iops->write_mem(b, 4, (void*)addr);
+	else
+		*(volatile unsigned int __force *) addr = b;
+}
+#define writeb_relaxed(b, addr) writeb(b, addr)
+#define writew_relaxed(b, addr) writew(b, addr)
+#define writel_relaxed(b, addr) writel(b, addr)
+#define __raw_writeb writeb
+#define __raw_writew writew
+#define __raw_writel writel
+
+#define mmiowb()
+
+#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))
+
+
+/* I/O port access. Normally there is no I/O space on CRIS but when
+ * Cardbus/PCI is enabled the request is passed through the bridge.
+ */
+
+#define IO_SPACE_LIMIT 0xffff
+#define inb(port) (cris_iops ? cris_iops->read_io(port,NULL,1,1) : 0)
+#define inw(port) (cris_iops ? cris_iops->read_io(port,NULL,2,1) : 0)
+#define inl(port) (cris_iops ? cris_iops->read_io(port,NULL,4,1) : 0)
+#define insb(port,addr,count) (cris_iops ? cris_iops->read_io(port,addr,1,count) : 0)
+#define insw(port,addr,count) (cris_iops ? cris_iops->read_io(port,addr,2,count) : 0)
+#define insl(port,addr,count) (cris_iops ? cris_iops->read_io(port,addr,4,count) : 0)
+static inline void outb(unsigned char data, unsigned int port)
+{
+	if (cris_iops)
+		cris_iops->write_io(port, (void *) &data, 1, 1);
+}
+static inline void outw(unsigned short data, unsigned int port)
+{
+	if (cris_iops)
+		cris_iops->write_io(port, (void *) &data, 2, 1);
+}
+static inline void outl(unsigned int data, unsigned int port)
+{
+	if (cris_iops)
+		cris_iops->write_io(port, (void *) &data, 4, 1);
+}
+static inline void outsb(unsigned int port, const void *addr,
+			 unsigned long count)
+{
+	if (cris_iops)
+		cris_iops->write_io(port, (void *)addr, 1, count);
+}
+static inline void outsw(unsigned int port, const void *addr,
+			 unsigned long count)
+{
+	if (cris_iops)
+		cris_iops->write_io(port, (void *)addr, 2, count);
+}
+static inline void outsl(unsigned int port, const void *addr,
+			 unsigned long count)
+{
+	if (cris_iops)
+		cris_iops->write_io(port, (void *)addr, 4, count);
+}
+
+#define inb_p(port)             inb(port)
+#define inw_p(port)             inw(port)
+#define inl_p(port)             inl(port)
+#define outb_p(val, port)       outb((val), (port))
+#define outw_p(val, port)       outw((val), (port))
+#define outl_p(val, port)       outl((val), (port))
+
+/*
+ * 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