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/*
* linux/include/asm-arm/arch-ebsa285/io.h
*
* Copyright (C) 1997,1998 Russell King
*
* Modifications:
* 06-Dec-1997 RMK Created.
*/
#ifndef __ASM_ARM_ARCH_IO_H
#define __ASM_ARM_ARCH_IO_H
#include <asm/dec21285.h>
/*
* This architecture does not require any delayed IO, and
* has the constant-optimised IO
*/
#undef ARCH_IO_DELAY
#define ARCH_READWRITE
/*
* Dynamic IO functions - let the compiler
* optimize the expressions
*/
#define DECLARE_DYN_OUT(fnsuffix,instr,typ) \
extern __inline__ void \
__out##fnsuffix (unsigned int value, unsigned int port) \
{ \
__asm__ __volatile__( \
"str%?" ##instr## " %0, [%1, %2] @ out"###fnsuffix \
: \
: "r" (value), "r" (PCIO_BASE), typ (port)); \
}
#define DECLARE_DYN_IN(sz,fnsuffix,instr,typ) \
extern __inline__ unsigned sz \
__in##fnsuffix (unsigned int port) \
{ \
unsigned long value; \
__asm__ __volatile__( \
"ldr%?" ##instr## " %0, [%1, %2] @ in"###fnsuffix \
: "=&r" (value) \
: "r" (PCIO_BASE), typ (port)); \
return (unsigned sz)value; \
}
extern __inline__ unsigned int __ioaddr (unsigned int port) \
{ \
return (unsigned int)(PCIO_BASE + port); \
}
#define DECLARE_IO(sz,fnsuffix,instr,typ) \
DECLARE_DYN_OUT(fnsuffix,instr,typ) \
DECLARE_DYN_IN(sz,fnsuffix,instr,typ)
DECLARE_IO(char,b,"b","Jr")
DECLARE_IO(short,w,"h","r")
DECLARE_IO(long,l,"","Jr")
#undef DECLARE_IO
#undef DECLARE_DYN_OUT
#undef DECLARE_DYN_IN
/*
* Constant address IO functions
*
* These have to be macros for the 'J' constraint to work -
* +/-4096 immediate operand.
*/
#define __outbc(value,port) \
({ \
__asm__ __volatile__( \
"str%?b %0, [%1, %2] @ outbc" \
: \
: "r" (value), "r" (PCIO_BASE), "Jr" (port)); \
})
#define __inbc(port) \
({ \
unsigned char result; \
__asm__ __volatile__( \
"ldr%?b %0, [%1, %2] @ inbc" \
: "=r" (result) \
: "r" (PCIO_BASE), "Jr" (port)); \
result; \
})
#define __outwc(value,port) \
({ \
__asm__ __volatile__( \
"str%?h %0, [%1, %2] @ outwc" \
: \
: "r" (value), "r" (PCIO_BASE), "r" (port)); \
})
#define __inwc(port) \
({ \
unsigned short result; \
__asm__ __volatile__( \
"ldr%?h %0, [%1, %2] @ inwc" \
: "=r" (result) \
: "r" (PCIO_BASE), "r" (port)); \
result & 0xffff; \
})
#define __outlc(value,port) \
({ \
__asm__ __volatile__( \
"str%? %0, [%1, %2] @ outlc" \
: \
: "r" (value), "r" (PCIO_BASE), "Jr" (port)); \
})
#define __inlc(port) \
({ \
unsigned long result; \
__asm__ __volatile__( \
"ldr%? %0, [%1, %2] @ inlc" \
: "=r" (result) \
: "r" (PCIO_BASE), "Jr" (port)); \
result; \
})
#define __ioaddrc(port) \
({ \
unsigned long addr; \
addr = PCIO_BASE + port; \
addr; \
})
/*
* Translated address IO functions
*
* IO address has already been translated to a virtual address
*/
#define outb_t(v,p) \
(*(volatile unsigned char *)(p) = (v))
#define inb_t(p) \
(*(volatile unsigned char *)(p))
#define outl_t(v,p) \
(*(volatile unsigned long *)(p) = (v))
#define inl_t(p) \
(*(volatile unsigned long *)(p))
/*
* ioremap support - validate a PCI memory address,
* and convert a PCI memory address to a physical
* address for the page tables.
*/
#define valid_ioaddr(iomem,size) ((iomem) < 0x80000000 && (iomem) + (size) <= 0x80000000)
#define io_to_phys(iomem) ((iomem) + DC21285_PCI_MEM)
/*
* Fudge up IO addresses by this much. Once we're confident that nobody
* is using read*() and so on with addresses they didn't get from ioremap
* this can go away.
*/
#define IO_FUDGE_FACTOR PCIMEM_BASE
/*
* ioremap takes a PCI memory address, as specified in
* linux/Documentation/IO-mapping.txt
*/
#define ioremap(iomem_addr,size) \
({ \
unsigned long _addr = (iomem_addr), _size = (size); \
void *_ret = NULL; \
if (valid_ioaddr(_addr, _size)) { \
_addr = io_to_phys(_addr); \
_ret = __ioremap(_addr, _size, 0) - IO_FUDGE_FACTOR; \
} \
_ret; })
#define ioremap_nocache(iomem_addr,size) ioremap((iomem_addr),(size))
extern void iounmap(void *addr);
#define DECLARE_PCI_WRITE(typ,fnsuffix) \
static inline void write##fnsuffix(unsigned typ val, unsigned int addr) \
{ \
*(volatile unsigned typ *)(IO_FUDGE_FACTOR + addr) = val; \
}
#define DECLARE_PCI_READ(typ,fnsuffix) \
static inline unsigned typ read##fnsuffix (unsigned int addr) \
{ \
return *(volatile unsigned typ *)(IO_FUDGE_FACTOR + addr); \
}
#define DECLARE_PCI(typ,fnsuffix) \
DECLARE_PCI_WRITE(typ,fnsuffix) \
DECLARE_PCI_READ(typ,fnsuffix)
DECLARE_PCI(char,b)
DECLARE_PCI(short,w)
DECLARE_PCI(long,l)
#undef DECLARE_PCI
#undef DECLARE_PCI_READ
#undef DECLARE_PCI_WRITE
#endif
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