The patch titled
AVR32: Add I/O port access primitives
has been added to the -mm tree. Its filename is
avr32-add-i-o-port-access-primitives.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: AVR32: Add I/O port access primitives
From: Haavard Skinnemoen <hskinnemoen@xxxxxxxxx>
This adds definitions of inb, outb and friends to include/asm-avr32/io.h
I'm still not sure about the best way to emulate I/O port access on
AVR32, but we should be able to override the __io() macro from
platform-specific headers in the future when we know better what the
requirements really are.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
include/asm-avr32/io.h | 88 ++++++++++++++++++++-------------------
1 file changed, 47 insertions(+), 41 deletions(-)
diff -puN include/asm-avr32/io.h~avr32-add-i-o-port-access-primitives include/asm-avr32/io.h
--- a/include/asm-avr32/io.h~avr32-add-i-o-port-access-primitives
+++ a/include/asm-avr32/io.h
@@ -5,6 +5,24 @@
#ifdef __KERNEL__
+#include <asm/addrspace.h>
+
+/* virt_to_phys will only work when address is in P1 or P2 */
+static __inline__ unsigned long virt_to_phys(volatile void *address)
+{
+ return PHYSADDR(address);
+}
+
+static __inline__ void * phys_to_virt(unsigned long address)
+{
+ return (void *)P1SEGADDR(address);
+}
+
+#define cached_to_phys(addr) ((unsigned long)PHYSADDR(addr))
+#define uncached_to_phys(addr) ((unsigned long)PHYSADDR(addr))
+#define phys_to_cached(addr) ((void *)P1SEGADDR(addr))
+#define phys_to_uncached(addr) ((void *)P2SEGADDR(addr))
+
/*
* Generic IO read/write. These perform native-endian accesses. Note
* that some architectures will want to re-define __raw_{read,write}w.
@@ -17,17 +35,6 @@ extern void __raw_readsb(unsigned int ad
extern void __raw_readsw(unsigned int addr, void *data, int wordlen);
extern void __raw_readsl(unsigned int addr, void *data, int longlen);
-#ifdef PCMCIA_HSMC_IO_HACK
-#error Needs updating
-/* The HMATRIX tries to byteswap the address for us, so we have to swap it back. */
-#define __raw_writeb(v,a) (*(volatile unsigned char *)((unsigned long)(a) ^ 3UL) = (v))
-#define __raw_writew(v,a) (*(volatile unsigned short *)((unsigned long)(a) ^ 2UL) = (v))
-#define __raw_writel(v,a) (*(volatile unsigned int *)(a) = (v))
-
-#define __raw_readb(a) (*(volatile unsigned char *)((unsigned long)(a) ^ 3UL))
-#define __raw_readw(a) (*(volatile unsigned short *)((unsigned long)(a) ^ 2UL))
-#define __raw_readl(a) (*(volatile unsigned int *)(a))
-#else
static inline void writeb(unsigned char b, volatile void __iomem *addr)
{
*(volatile unsigned char __force *)addr = b;
@@ -59,7 +66,6 @@ static inline unsigned int readl(const v
#define __raw_readb readb
#define __raw_readw readw
#define __raw_readl readl
-#endif
#define writesb(p, d, l) __raw_writesb((unsigned int)p, d, l)
#define writesw(p, d, l) __raw_writesw((unsigned int)p, d, l)
@@ -109,18 +115,36 @@ extern void __readwrite_bug(const char *
#define IO_SPACE_LIMIT 0xffffffff
+/* Convert I/O port address to virtual address */
+#define __io(p) ((void __iomem *)phys_to_uncached(p))
+
/*
- * All I/O is memory mapped, so these macros don't make very much
- * sense. They are needed for PCMCIA support, however, so we'll have
- * to implement them somehow. For now, they will cause linker errors.
- */
-extern void outb(unsigned char value, unsigned long port);
-extern void outw(unsigned short value, unsigned long port);
-extern void outl(unsigned long value, unsigned long port);
-
-extern unsigned char inb(unsigned long port);
-extern unsigned short inw(unsigned long port);
-extern unsigned long inl(unsigned long port);
+ * IO port access primitives
+ * -------------------------
+ *
+ * The AVR32 doesn't have special IO access instructions; all IO is memory
+ * mapped. Note that these are defined to perform little endian accesses
+ * only. Their primary purpose is to access PCI and ISA peripherals.
+ *
+ * Note that for a big endian machine, this implies that the following
+ * big endian mode connectivity is in place.
+ *
+ * The machine specific io.h include defines __io to translate an "IO"
+ * address to a memory address.
+ *
+ * Note that we prevent GCC re-ordering or caching values in expressions
+ * by introducing sequence points into the in*() definitions. Note that
+ * __raw_* do not guarantee this behaviour.
+ *
+ * The {in,out}[bwl] macros are for emulating x86-style PCI/ISA IO space.
+ */
+#define outb(v, p) __raw_writeb(v, __io(p))
+#define outw(v, p) __raw_writew(cpu_to_le16(v), __io(p))
+#define outl(v, p) __raw_writel(cpu_to_le32(v), __io(p))
+
+#define inb(p) __raw_readb(__io(p))
+#define inw(p) le16_to_cpu(__raw_readw(__io(p)))
+#define inl(p) le32_to_cpu(__raw_readl(__io(p)))
static inline void __outsb(unsigned long port, void *addr, unsigned int count)
{
@@ -197,24 +221,6 @@ extern void __iounmap(void __iomem *addr
#define iounmap(addr) \
__iounmap(addr)
-#include <asm/addrspace.h>
-
-/* virt_to_phys will only work when address is in P1 or P2 */
-static __inline__ unsigned long virt_to_phys(volatile void *address)
-{
- return PHYSADDR(address);
-}
-
-static __inline__ void * phys_to_virt(unsigned long address)
-{
- return (void *)P1SEGADDR(address);
-}
-
-#define cached_to_phys(addr) ((unsigned long)PHYSADDR(addr))
-#define uncached_to_phys(addr) ((unsigned long)PHYSADDR(addr))
-#define phys_to_cached(addr) ((void *)P1SEGADDR(addr))
-#define phys_to_uncached(addr) ((void *)P2SEGADDR(addr))
-
#define cached(addr) P1SEGADDR(addr)
#define uncached(addr) P2SEGADDR(addr)
_
Patches currently in -mm which might be from hskinnemoen@xxxxxxxxx are
avr32-arch.patch
avr32-config_debug_bugverbose-and-config_frame_pointer.patch
avr32-fix-invalid-constraints-for-stcond.patch
avr32-add-support-for-irq-flags-state-tracing.patch
avr32-turn-off-support-for-discontigmem-and-sparsemem.patch
avr32-always-enable-config_embedded.patch
avr32-export-the-find__bit-functions.patch
avr32-add-defconfig-for-at32stk1002.patch
avr32-use-autoconf-instead-of-marker.patch
avr32-dont-assume-anything-about-max_nr_zones.patch
avr32-add-i-o-port-access-primitives.patch
avr32-use-linux-pfnh.patch
avr32-kill-config_discontigmem-support-completely.patch
avr32-add-nsproxy-definition.patch
-
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