patch-2.4.20 linux-2.4.20/include/asm-parisc/io.h

• Lines: 290
• Date: Thu Nov 28 15:53:15 2002
• Orig file: linux-2.4.19/include/asm-parisc/io.h
• Orig date: Wed Dec 6 11:46:39 2000

diff -urN linux-2.4.19/include/asm-parisc/io.h linux-2.4.20/include/asm-parisc/io.h
@@ -1,15 +1,195 @@
 #ifndef _ASM_IO_H
 #define _ASM_IO_H
 
+/* USE_HPPA_IOREMAP IS THE MAGIC FLAG TO ENABLE OR DISABLE REAL IOREMAP() FUNCTIONALITY */
+/* FOR 712 or 715 MACHINES THIS SHOULD BE ENABLED, 
+   NEWER MACHINES STILL HAVE SOME ISSUES IN THE SCSI AND/OR NETWORK DRIVERS AND 
+   BECAUSE OF THAT I WILL LEAVE IT DISABLED FOR NOW <deller@gmx.de> */
+/* WHEN THOSE ISSUES ARE SOLVED, USE_HPPA_IOREMAP WILL GO AWAY */
+#define USE_HPPA_IOREMAP 0
+
+
 #include <linux/config.h>
 #include <linux/types.h>
-#include <asm/gsc.h>
+#include <asm/pgtable.h>
 
 #define virt_to_phys(a) ((unsigned long)__pa(a))
 #define phys_to_virt(a) __va(a)
 #define virt_to_bus virt_to_phys
 #define bus_to_virt phys_to_virt
 
+/* Memory mapped IO */
+
+extern void * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
+
+extern inline void * ioremap(unsigned long offset, unsigned long size)
+{
+	return __ioremap(offset, size, 0);
+}
+
+/*
+ * This one maps high address device memory and turns off caching for that area.
+ * it's useful if some control registers are in such an area and write combining
+ * or read caching is not desirable:
+ */
+extern inline void * ioremap_nocache (unsigned long offset, unsigned long size)
+{
+        return __ioremap(offset, size, _PAGE_NO_CACHE /* _PAGE_PCD */);
+}
+
+extern void iounmap(void *addr);
+
+/*
+ * __raw_ variants have no defined meaning.  on hppa, it means `i was
+ * too lazy to ioremap first'.  kind of like isa_, except that there's
+ * no additional base address to add on.
+ */
+extern __inline__ unsigned char __raw_readb(unsigned long addr)
+{
+	long flags;
+	unsigned char ret;
+
+	__asm__ __volatile__(
+	"	rsm	2,%0\n"
+	"	ldbx	0(%2),%1\n"
+	"	mtsm	%0\n"
+	: "=&r" (flags), "=r" (ret) : "r" (addr) );
+
+	return ret;
+}
+
+extern __inline__ unsigned short __raw_readw(unsigned long addr)
+{
+	long flags;
+	unsigned short ret;
+
+	__asm__ __volatile__(
+	"	rsm	2,%0\n"
+	"	ldhx	0(%2),%1\n"
+	"	mtsm	%0\n"
+	: "=&r" (flags), "=r" (ret) : "r" (addr) );
+
+	return ret;
+}
+
+extern __inline__ unsigned int __raw_readl(unsigned long addr)
+{
+	u32 ret;
+
+	__asm__ __volatile__(
+	"	ldwax	0(%1),%0\n"
+	: "=r" (ret) : "r" (addr) );
+
+	return ret;
+}
+
+extern __inline__ unsigned long long __raw_readq(unsigned long addr)
+{
+	unsigned long long ret;
+#ifdef __LP64__
+	__asm__ __volatile__(
+	"	ldda	0(%1),%0\n"
+	:  "=r" (ret) : "r" (addr) );
+#else
+	/* two reads may have side effects.. */
+	ret = ((u64) __raw_readl(addr)) << 32;
+	ret |= __raw_readl(addr+4);
+#endif
+	return ret;
+}
+
+extern __inline__ void __raw_writeb(unsigned char val, unsigned long addr)
+{
+	long flags;
+	__asm__ __volatile__(
+	"	rsm	2,%0\n"
+	"	stbs	%1,0(%2)\n"
+	"	mtsm	%0\n"
+	: "=&r" (flags) :  "r" (val), "r" (addr) );
+}
+
+extern __inline__ void __raw_writew(unsigned short val, unsigned long addr)
+{
+	long flags;
+	__asm__ __volatile__(
+	"	rsm	2,%0\n"
+	"	sths	%1,0(%2)\n"
+	"	mtsm	%0\n"
+	: "=&r" (flags) :  "r" (val), "r" (addr) );
+}
+
+extern __inline__ void __raw_writel(unsigned int val, unsigned long addr)
+{
+	__asm__ __volatile__(
+	"	stwas	%0,0(%1)\n"
+	: :  "r" (val), "r" (addr) );
+}
+
+extern __inline__ void __raw_writeq(unsigned long long val, unsigned long addr)
+{
+#ifdef __LP64__
+	__asm__ __volatile__(
+	"	stda	%0,0(%1)\n"
+	: :  "r" (val), "r" (addr) );
+#else
+	/* two writes may have side effects.. */
+	__raw_writel(val >> 32, addr);
+	__raw_writel(val, addr+4);
+#endif
+}
+
+#if USE_HPPA_IOREMAP
+#define readb(addr) (*(volatile unsigned char *) (addr))
+#define readw(addr) (*(volatile unsigned short *) (addr))
+#define readl(addr) (*(volatile unsigned int *) (addr))
+#define readq(addr) (*(volatile u64 *) (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))
+#define writeq(b,addr) (*(volatile u64 *) (addr) = (b))
+#else /* !USE_HPPA_IOREMAP */
+#define readb(addr) __raw_readb((unsigned long)(addr))
+#define readw(addr) le16_to_cpu(__raw_readw((unsigned long)(addr)))
+#define readl(addr) le32_to_cpu(__raw_readl((unsigned long)(addr)))
+#define readq(addr) le64_to_cpu(__raw_readq((unsigned long)(addr)))
+#define writeb(b,addr) __raw_writeb(b,(unsigned long)(addr))
+#define writew(b,addr) __raw_writew(cpu_to_le16(b),(unsigned long)(addr))
+#define writel(b,addr) __raw_writel(cpu_to_le32(b),(unsigned long)(addr))
+#define writeq(b,addr) __raw_writeq(cpu_to_le64(b),(unsigned long)(addr))
+#endif /* !USE_HPPA_IOREMAP */
+
+extern void memcpy_fromio(void *dest, unsigned long src, int count);
+extern void memcpy_toio(unsigned long dest, const void *src, int count);
+extern void memset_io(unsigned long dest, char fill, int count);
+
+/* Support old drivers which don't ioremap.
+ * NB this interface is scheduled to disappear in 2.5
+ */
+
+#define EISA_BASE 0xfffffffffc000000UL
+#define isa_readb(a) readb(EISA_BASE | (a))
+#define isa_readw(a) readw(EISA_BASE | (a))
+#define isa_readl(a) readl(EISA_BASE | (a))
+#define isa_writeb(b,a) writeb((b), EISA_BASE | (a))
+#define isa_writew(b,a) writew((b), EISA_BASE | (a))
+#define isa_writel(b,a) writel((b), EISA_BASE | (a))
+#define isa_memset_io(a,b,c) memset_io(EISA_BASE | (a), (b), (c))
+#define isa_memcpy_fromio(a,b,c) memcpy_fromio((a), EISA_BASE | (b), (c))
+#define isa_memcpy_toio(a,b,c) memcpy_toio(EISA_BASE | (a), (b), (c))
+
+/*
+ * XXX - We don't have csum_partial_copy_fromio() yet, so we cheat here and 
+ * just copy it. The net code will then do the checksum later. Presently 
+ * only used by some shared memory 8390 Ethernet cards anyway.
+ */
+
+#define eth_io_copy_and_sum(skb,src,len,unused) \
+  memcpy_fromio((skb)->data,(src),(len))
+#define isa_eth_io_copy_and_sum(skb,src,len,unused) \
+  isa_memcpy_fromio((skb)->data,(src),(len))
+
+/* Port-space IO */
+
 #define inb_p inb
 #define inw_p inw
 #define inl_p inl
@@ -17,42 +197,66 @@
 #define outw_p outw
 #define outl_p outl
 
-#define readb gsc_readb
-#define readw gsc_readw
-#define readl gsc_readl
-#define writeb gsc_writeb
-#define writew gsc_writew
-#define writel gsc_writel
-
+extern unsigned char eisa_in8(unsigned short port);
+extern unsigned short eisa_in16(unsigned short port);
+extern unsigned int eisa_in32(unsigned short port);
+extern void eisa_out8(unsigned char data, unsigned short port);
+extern void eisa_out16(unsigned short data, unsigned short port);
+extern void eisa_out32(unsigned int data, unsigned short port);
+
+#if defined(CONFIG_PCI)
+extern unsigned char inb(int addr);
+extern unsigned short inw(int addr);
+extern unsigned int inl(int addr);
+
+extern void outb(unsigned char b, int addr);
+extern void outw(unsigned short b, int addr);
+extern void outl(unsigned int b, int addr);
+#elif defined(CONFIG_EISA)
+#define inb eisa_in8
+#define inw eisa_in16
+#define inl eisa_in32
+#define outb eisa_out8
+#define outw eisa_out16
+#define outl eisa_out32
+#else
+static inline char inb(unsigned long addr)
+{
+	BUG();
+	return -1;
+}
 
-#if defined(CONFIG_PCI) || defined(CONFIG_ISA)
-/*
- *	So we get clear link errors 
- */
-extern u8 inb(unsigned long addr);
-extern u16 inw(unsigned long addr);
-extern u32 inl(unsigned long addr);
-
-extern void outb(unsigned char b, unsigned long addr);
-extern void outw(unsigned short b, unsigned long addr);
-extern void outl(u32 b, unsigned long addr);
+static inline short inw(unsigned long addr)
+{
+	BUG();
+	return -1;
+}
 
-static inline void memcpy_toio(void *dest, void *src, int count) 
+static inline int inl(unsigned long addr)
 {
-	while(count--)
-		writeb(*((char *)src)++, (char *)dest++);
+	BUG();
+	return -1;
 }
 
+#define outb(x, y)	BUG()
+#define outw(x, y)	BUG()
+#define outl(x, y)	BUG()
 #endif
 
+/*
+ * String versions of in/out ops:
+ */
+extern void insb (unsigned long port, void *dst, unsigned long count);
+extern void insw (unsigned long port, void *dst, unsigned long count);
+extern void insl (unsigned long port, void *dst, unsigned long count);
+extern void outsb (unsigned long port, const void *src, unsigned long count);
+extern void outsw (unsigned long port, const void *src, unsigned long count);
+extern void outsl (unsigned long port, const void *src, unsigned long count);
+
+
 /* IO Port space is :      BBiiii   where BB is HBA number. */
 #define IO_SPACE_LIMIT 0x00ffffff
 
-/* Right now we don't support Dino-on-a-card and V class which do PCI MMIO
- * through address/data registers. */
-
-#define ioremap(__offset, __size)	((void *)(__offset))
-#define iounmap(__addr)
 
 #define dma_cache_inv(_start,_size)		do { flush_kernel_dcache_range(_start,_size); } while(0)
 #define dma_cache_wback(_start,_size)		do { flush_kernel_dcache_range(_start,_size); } while (0)