patch-1.3.45 linux/include/asm-ppc/io.h

• Lines: 87
• Date: Sat Nov 25 19:49:06 1995
• Orig file: v1.3.44/linux/include/asm-ppc/io.h
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.44/linux/include/asm-ppc/io.h linux/include/asm-ppc/io.h
@@ -0,0 +1,86 @@
+#ifndef _PPC_IO_H
+#define _PPC_IO_H
+
+/* Define the particulars of outb/outw/outl "instructions" */
+
+#define SLOW_DOWN_IO
+
+#ifndef PCI_DRAM_OFFSET
+#define PCI_DRAM_OFFSET  0x80000000
+#endif
+#ifndef KERNELBASE
+#define KERNELBASE 0x90000000
+#endif
+
+/*
+ * The PCI bus is inherently Little-Endian.  The PowerPC is being
+ * run Big-Endian.  Thus all values which cross the [PCI] barrier
+ * must be endian-adjusted.  Also, the local DRAM has a different
+ * address from the PCI point of view, thus buffer addresses also
+ * have to be modified [mapped] appropriately.
+ */
+extern inline unsigned long virt_to_bus(volatile void * address)
+{
+        if (address == (void *)0) return 0;
+        return ((unsigned long)((long)address - KERNELBASE + PCI_DRAM_OFFSET));
+}
+
+extern inline void * bus_to_virt(unsigned long address)
+{
+        if (address == 0) return 0;
+        return ((void *)(address - PCI_DRAM_OFFSET + KERNELBASE));
+}
+/* #define virt_to_bus(a) ((unsigned long)(((char *)a==(char *) 0) ? ((char *)0) \
+			: ((char *)((long)a - KERNELBASE + PCI_DRAM_OFFSET))))
+#define bus_to_virt(a) ((void *) (((char *)a==(char *)0) ? ((char *)0) \
+			: ((char *)((long)a - PCI_DRAM_OFFSET + KERNELBASE))))
+*/
+
+#define readb(addr) (*(volatile unsigned char *) (addr))
+#define readw(addr) (*(volatile unsigned short *) (addr))
+#define readl(addr) (*(volatile unsigned int *) (addr))
+
+#define writeb(b,addr) ((*(volatile unsigned char *) (addr)) = (b))
+#define writew(b,addr) ((*(volatile unsigned short *) (addr)) = (b))
+#define writel(b,addr) ((*(volatile unsigned int *) (addr)) = (b))
+
+/*
+ * Change virtual addresses to physical addresses and vv.
+ * These are trivial on the 1:1 Linux/i386 mapping (but if we ever
+ * make the kernel segment mapped at 0, we need to do translation
+ * on the i386 as well)
+ */
+extern inline unsigned long virt_to_phys(volatile void * address)
+{
+	return (unsigned long) address;
+}
+
+extern inline void * phys_to_virt(unsigned long address)
+{
+	return (void *) address;
+}
+
+/* from arch/ppc/kernel/port_io.c
+ *               -- Cort
+ */
+unsigned char inb(int port);
+unsigned short inw(int port);
+unsigned long inl(int port);
+unsigned char outb(unsigned char val,int port);
+unsigned short outw(unsigned short val,int port);
+unsigned long outl(unsigned long val,int port);
+void outsl(int port, long *ptr, int len);
+
+static inline unsigned char  inb_p(int port) {return (inb(port)); }
+static inline unsigned short inw_p(int port) {return (inw(port)); }
+static inline unsigned long  inl_p(int port) {return (inl(port)); }
+
+
+
+static inline unsigned char  outb_p(unsigned char val,int port) { return (outb(val,port)); }
+static inline unsigned short outw_p(unsigned short val,int port) { return (outw(val,port)); }
+static inline unsigned long  outl_p(unsigned long val,int port) { return (outl(val,port)); }
+
+
+
+#endif