#ifndef _ASM_IO_H
#define _ASM_IO_H
+#include <linux/config.h>
#include <linux/types.h>
#include <asm/pgtable.h>
* eg dev->hpa or 0xfee00000.
*/
+#ifdef CONFIG_DEBUG_IOREMAP
+#ifdef CONFIG_64BIT
+#define NYBBLE_SHIFT 60
+#else
+#define NYBBLE_SHIFT 28
+#endif
+extern void gsc_bad_addr(unsigned long addr);
+extern void __raw_bad_addr(const volatile void __iomem *addr);
+#define gsc_check_addr(addr) \
+ if ((addr >> NYBBLE_SHIFT) != 0xf) { \
+ gsc_bad_addr(addr); \
+ addr |= 0xfUL << NYBBLE_SHIFT; \
+ }
+#define __raw_check_addr(addr) \
+ if (((unsigned long)addr >> NYBBLE_SHIFT) != 0xe) \
+ __raw_bad_addr(addr); \
+ addr = (void __iomem *)((unsigned long)addr | (0xfUL << NYBBLE_SHIFT));
+#else
+#define gsc_check_addr(addr)
+#define __raw_check_addr(addr)
+#endif
+
static inline unsigned char gsc_readb(unsigned long addr)
{
long flags;
unsigned char ret;
+ gsc_check_addr(addr);
+
__asm__ __volatile__(
" rsm 2,%0\n"
" ldbx 0(%2),%1\n"
long flags;
unsigned short ret;
+ gsc_check_addr(addr);
+
__asm__ __volatile__(
" rsm 2,%0\n"
" ldhx 0(%2),%1\n"
{
u32 ret;
+ gsc_check_addr(addr);
+
__asm__ __volatile__(
" ldwax 0(%1),%0\n"
: "=r" (ret) : "r" (addr) );
static inline unsigned long long gsc_readq(unsigned long addr)
{
unsigned long long ret;
+ gsc_check_addr(addr);
#ifdef __LP64__
__asm__ __volatile__(
static inline void gsc_writeb(unsigned char val, unsigned long addr)
{
long flags;
+ gsc_check_addr(addr);
+
__asm__ __volatile__(
" rsm 2,%0\n"
" stbs %1,0(%2)\n"
static inline void gsc_writew(unsigned short val, unsigned long addr)
{
long flags;
+ gsc_check_addr(addr);
+
__asm__ __volatile__(
" rsm 2,%0\n"
" sths %1,0(%2)\n"
static inline void gsc_writel(unsigned int val, unsigned long addr)
{
+ gsc_check_addr(addr);
+
__asm__ __volatile__(
" stwas %0,0(%1)\n"
: : "r" (val), "r" (addr) );
static inline void gsc_writeq(unsigned long long val, unsigned long addr)
{
+ gsc_check_addr(addr);
+
#ifdef __LP64__
__asm__ __volatile__(
" stda %0,0(%1)\n"
extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
-/* Most machines react poorly to I/O-space being cacheable... Instead let's
- * define ioremap() in terms of ioremap_nocache().
- */
extern inline void __iomem * ioremap(unsigned long offset, unsigned long size)
{
- return __ioremap(offset, size, _PAGE_NO_CACHE);
+ 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 */);
}
-#define ioremap_nocache(off, sz) ioremap((off), (sz))
extern void iounmap(void __iomem *addr);
+/*
+ * USE_HPPA_IOREMAP is the magic flag to enable or disable real ioremap()
+ * functionality. It's currently disabled because it may not work on some
+ * machines.
+ */
+#define USE_HPPA_IOREMAP 0
+
+#if USE_HPPA_IOREMAP
static inline unsigned char __raw_readb(const volatile void __iomem *addr)
{
return (*(volatile unsigned char __force *) (addr));
{
*(volatile unsigned long long __force *) addr = b;
}
+#else /* !USE_HPPA_IOREMAP */
+static inline unsigned char __raw_readb(const volatile void __iomem *addr)
+{
+ __raw_check_addr(addr);
+
+ return gsc_readb((unsigned long) addr);
+}
+static inline unsigned short __raw_readw(const volatile void __iomem *addr)
+{
+ __raw_check_addr(addr);
+
+ return gsc_readw((unsigned long) addr);
+}
+static inline unsigned int __raw_readl(const volatile void __iomem *addr)
+{
+ __raw_check_addr(addr);
+
+ return gsc_readl((unsigned long) addr);
+}
+static inline unsigned long long __raw_readq(const volatile void __iomem *addr)
+{
+ __raw_check_addr(addr);
+
+ return gsc_readq((unsigned long) addr);
+}
+
+static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr)
+{
+ __raw_check_addr(addr);
+
+ gsc_writeb(b, (unsigned long) addr);
+}
+static inline void __raw_writew(unsigned short b, volatile void __iomem *addr)
+{
+ __raw_check_addr(addr);
+
+ gsc_writew(b, (unsigned long) addr);
+}
+static inline void __raw_writel(unsigned int b, volatile void __iomem *addr)
+{
+ __raw_check_addr(addr);
+
+ gsc_writel(b, (unsigned long) addr);
+}
+static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr)
+{
+ __raw_check_addr(addr);
+
+ gsc_writeq(b, (unsigned long) addr);
+}
+#endif /* !USE_HPPA_IOREMAP */
/* readb can never be const, so use __fswab instead of le*_to_cpu */
#define readb(addr) __raw_readb(addr)
void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
void memcpy_toio(volatile void __iomem *dst, const void *src, int count);
+/* Support old drivers which don't ioremap.
+ * NB this interface is scheduled to disappear in 2.5
+ */
+
+#define __isa_addr(x) (void __iomem *)(F_EXTEND(0xfc000000) | (x))
+#define isa_readb(a) readb(__isa_addr(a))
+#define isa_readw(a) readw(__isa_addr(a))
+#define isa_readl(a) readl(__isa_addr(a))
+#define isa_writeb(b,a) writeb((b), __isa_addr(a))
+#define isa_writew(b,a) writew((b), __isa_addr(a))
+#define isa_writel(b,a) writel((b), __isa_addr(a))
+#define isa_memset_io(a,b,c) memset_io(__isa_addr(a), (b), (c))
+#define isa_memcpy_fromio(a,b,c) memcpy_fromio((a), __isa_addr(b), (c))
+#define isa_memcpy_toio(a,b,c) memcpy_toio(__isa_addr(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
#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 */
git://git.onelab.eu / linux-2.6.git / blobdiff