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linux/arch/avr32/include/asm/io.h
Toshi Kani 556269c138 arch/*/io.h: Add ioremap_wt() to all architectures 
Add ioremap_wt() to all arch-specific asm/io.h headers which
define ioremap_wc() locally. These headers do not include
<asm-generic/iomap.h>. Some of them include <asm-generic/io.h>,
but ioremap_wt() is defined for consistency since they define
all ioremap_xxx locally.

In all architectures without Write-Through support, ioremap_wt()
is defined indentical to ioremap_nocache().

frv and m68k already have ioremap_writethrough(). On those we
add ioremap_wt() indetical to ioremap_writethrough() and defines
ARCH_HAS_IOREMAP_WT in both architectures.

The ioremap_wt() interface is exported to drivers.

Signed-off-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Elliott@hp.com
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: arnd@arndb.de
Cc: hch@lst.de
Cc: hmh@hmh.eng.br
Cc: jgross@suse.com
Cc: konrad.wilk@oracle.com
Cc: linux-mm <linux-mm@kvack.org>
Cc: linux-nvdimm@lists.01.org
Cc: stefan.bader@canonical.com
Cc: yigal@plexistor.com
Link: http://lkml.kernel.org/r/1433436928-31903-9-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-06-07 15:28:57 +02:00

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#ifndef __ASM_AVR32_IO_H
#define __ASM_AVR32_IO_H
#include <linux/bug.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/types.h>
#include <asm/addrspace.h>
#include <asm/byteorder.h>
#include <mach/io.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.
*/
extern void __raw_writesb(void __iomem *addr, const void *data, int bytelen);
extern void __raw_writesw(void __iomem *addr, const void *data, int wordlen);
extern void __raw_writesl(void __iomem *addr, const void *data, int longlen);
extern void __raw_readsb(const void __iomem *addr, void *data, int bytelen);
extern void __raw_readsw(const void __iomem *addr, void *data, int wordlen);
extern void __raw_readsl(const void __iomem *addr, void *data, int longlen);
static inline void __raw_writeb(u8 v, volatile void __iomem *addr)
{
*(volatile u8 __force *)addr = v;
}
static inline void __raw_writew(u16 v, volatile void __iomem *addr)
{
*(volatile u16 __force *)addr = v;
}
static inline void __raw_writel(u32 v, volatile void __iomem *addr)
{
*(volatile u32 __force *)addr = v;
}
static inline u8 __raw_readb(const volatile void __iomem *addr)
{
return *(const volatile u8 __force *)addr;
}
static inline u16 __raw_readw(const volatile void __iomem *addr)
{
return *(const volatile u16 __force *)addr;
}
static inline u32 __raw_readl(const volatile void __iomem *addr)
{
return *(const volatile u32 __force *)addr;
}
/* Convert I/O port address to virtual address */
#ifndef __io
# define __io(p) ((void *)phys_to_uncached(p))
#endif
/*
* Not really sure about the best way to slow down I/O on
* AVR32. Defining it as a no-op until we have an actual test case.
*/
#define SLOW_DOWN_IO do { } while (0)
#define __BUILD_MEMORY_SINGLE(pfx, bwl, type) \
static inline void \
pfx##write##bwl(type val, volatile void __iomem *addr) \
{ \
volatile type *__addr; \
type __val; \
\
__addr = (void *)__swizzle_addr_##bwl((unsigned long)(addr)); \
__val = pfx##ioswab##bwl(__addr, val); \
\
BUILD_BUG_ON(sizeof(type) > sizeof(unsigned long)); \
\
*__addr = __val; \
} \
\
static inline type pfx##read##bwl(const volatile void __iomem *addr) \
{ \
volatile type *__addr; \
type __val; \
\
__addr = (void *)__swizzle_addr_##bwl((unsigned long)(addr)); \
\
BUILD_BUG_ON(sizeof(type) > sizeof(unsigned long)); \
\
__val = *__addr; \
return pfx##ioswab##bwl(__addr, __val); \
}
#define __BUILD_IOPORT_SINGLE(pfx, bwl, type, p, slow) \
static inline void pfx##out##bwl##p(type val, unsigned long port) \
{ \
volatile type *__addr; \
type __val; \
\
__addr = __io(__swizzle_addr_##bwl(port)); \
__val = pfx##ioswab##bwl(__addr, val); \
\
BUILD_BUG_ON(sizeof(type) > sizeof(unsigned long)); \
\
*__addr = __val; \
slow; \
} \
\
static inline type pfx##in##bwl##p(unsigned long port) \
{ \
volatile type *__addr; \
type __val; \
\
__addr = __io(__swizzle_addr_##bwl(port)); \
\
BUILD_BUG_ON(sizeof(type) > sizeof(unsigned long)); \
\
__val = *__addr; \
slow; \
\
return pfx##ioswab##bwl(__addr, __val); \
}
#define __BUILD_MEMORY_PFX(bus, bwl, type) \
__BUILD_MEMORY_SINGLE(bus, bwl, type)
#define BUILDIO_MEM(bwl, type) \
__BUILD_MEMORY_PFX(, bwl, type) \
__BUILD_MEMORY_PFX(__mem_, bwl, type)
#define __BUILD_IOPORT_PFX(bus, bwl, type) \
__BUILD_IOPORT_SINGLE(bus, bwl, type, ,) \
__BUILD_IOPORT_SINGLE(bus, bwl, type, _p, SLOW_DOWN_IO)
#define BUILDIO_IOPORT(bwl, type) \
__BUILD_IOPORT_PFX(, bwl, type) \
__BUILD_IOPORT_PFX(__mem_, bwl, type)
BUILDIO_MEM(b, u8)
BUILDIO_MEM(w, u16)
BUILDIO_MEM(l, u32)
BUILDIO_IOPORT(b, u8)
BUILDIO_IOPORT(w, u16)
BUILDIO_IOPORT(l, u32)
#define readb_relaxed readb
#define readw_relaxed readw
#define readl_relaxed readl
#define readb_be __raw_readb
#define readw_be __raw_readw
#define readl_be __raw_readl
#define writeb_relaxed writeb
#define writew_relaxed writew
#define writel_relaxed writel
#define writeb_be __raw_writeb
#define writew_be __raw_writew
#define writel_be __raw_writel
#define __BUILD_MEMORY_STRING(bwl, type) \
static inline void writes##bwl(volatile void __iomem *addr, \
const void *data, unsigned int count) \
{ \
const type *__data = data; \
\
while (count--) \
__mem_write##bwl(*__data++, addr); \
} \
\
static inline void reads##bwl(const volatile void __iomem *addr, \
void *data, unsigned int count) \
{ \
type *__data = data; \
\
while (count--) \
*__data++ = __mem_read##bwl(addr); \
}
#define __BUILD_IOPORT_STRING(bwl, type) \
static inline void outs##bwl(unsigned long port, const void *data, \
unsigned int count) \
{ \
const type *__data = data; \
\
while (count--) \
__mem_out##bwl(*__data++, port); \
} \
\
static inline void ins##bwl(unsigned long port, void *data, \
unsigned int count) \
{ \
type *__data = data; \
\
while (count--) \
*__data++ = __mem_in##bwl(port); \
}
#define BUILDSTRING(bwl, type) \
__BUILD_MEMORY_STRING(bwl, type) \
__BUILD_IOPORT_STRING(bwl, type)
BUILDSTRING(b, u8)
BUILDSTRING(w, u16)
BUILDSTRING(l, u32)
/*
* io{read,write}{8,16,32} macros in both le (for PCI style consumers) and native be
*/
#ifndef ioread8
#define ioread8(p) ((unsigned int)readb(p))
#define ioread16(p) ((unsigned int)readw(p))
#define ioread16be(p) ((unsigned int)__raw_readw(p))
#define ioread32(p) ((unsigned int)readl(p))
#define ioread32be(p) ((unsigned int)__raw_readl(p))
#define iowrite8(v,p) writeb(v, p)
#define iowrite16(v,p) writew(v, p)
#define iowrite16be(v,p) __raw_writew(v, p)
#define iowrite32(v,p) writel(v, p)
#define iowrite32be(v,p) __raw_writel(v, p)
#define ioread8_rep(p,d,c) readsb(p,d,c)
#define ioread16_rep(p,d,c) readsw(p,d,c)
#define ioread32_rep(p,d,c) readsl(p,d,c)
#define iowrite8_rep(p,s,c) writesb(p,s,c)
#define iowrite16_rep(p,s,c) writesw(p,s,c)
#define iowrite32_rep(p,s,c) writesl(p,s,c)
#endif
static inline void memcpy_fromio(void * to, const volatile void __iomem *from,
unsigned long count)
{
memcpy(to, (const void __force *)from, count);
}
static inline void memcpy_toio(volatile void __iomem *to, const void * from,
unsigned long count)
{
memcpy((void __force *)to, from, count);
}
static inline void memset_io(volatile void __iomem *addr, unsigned char val,
unsigned long count)
{
memset((void __force *)addr, val, count);
}
#define mmiowb()
#define IO_SPACE_LIMIT 0xffffffff
extern void __iomem *__ioremap(unsigned long offset, size_t size,
unsigned long flags);
extern void __iounmap(void __iomem *addr);
/*
* ioremap - map bus memory into CPU space
* @offset bus address of the memory
* @size size of the resource to map
*
* ioremap performs a platform specific sequence of operations to make
* bus memory CPU accessible via the readb/.../writel functions and
* the other mmio helpers. The returned address is not guaranteed to
* be usable directly as a virtual address.
*/
#define ioremap(offset, size) \
__ioremap((offset), (size), 0)
#define ioremap_nocache(offset, size) \
__ioremap((offset), (size), 0)
#define iounmap(addr) \
__iounmap(addr)
#define ioremap_wc ioremap_nocache
#define ioremap_wt ioremap_nocache
#define cached(addr) P1SEGADDR(addr)
#define uncached(addr) P2SEGADDR(addr)
#define virt_to_bus virt_to_phys
#define bus_to_virt phys_to_virt
#define page_to_bus page_to_phys
#define bus_to_page phys_to_page
/*
* Create a virtual mapping cookie for an IO port range. There exists
* no such thing as port-based I/O on AVR32, so a regular ioremap()
* should do what we need.
*/
#define ioport_map(port, nr) ioremap(port, nr)
#define ioport_unmap(port) iounmap(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 /* __ASM_AVR32_IO_H */
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