- 根目录:
- arch
- arm
- mach-s3c24xx
- include
- mach
- io.h
/*
* arch/arm/mach-s3c2410/include/mach/io.h
* from arch/arm/mach-rpc/include/mach/io.h
*
* Copyright (C) 1997 Russell King
* (C) 2003 Simtec Electronics
*/
#ifndef __ASM_ARM_ARCH_IO_H
#define __ASM_ARM_ARCH_IO_H
#include <mach/hardware.h>
#define IO_SPACE_LIMIT 0xffffffff
/*
* We use two different types of addressing - PC style addresses, and ARM
* addresses. PC style accesses the PC hardware with the normal PC IO
* addresses, eg 0x3f8 for serial#1. ARM addresses are above A28
* and are translated to the start of IO. Note that all addresses are
* not shifted left!
*/
#define __PORT_PCIO(x) ((x) < (1<<28))
#define PCIO_BASE (S3C24XX_VA_ISA_WORD)
#define PCIO_BASE_b (S3C24XX_VA_ISA_BYTE)
#define PCIO_BASE_w (S3C24XX_VA_ISA_WORD)
#define PCIO_BASE_l (S3C24XX_VA_ISA_WORD)
/*
* Dynamic IO functions - let the compiler
* optimize the expressions
*/
#define DECLARE_DYN_OUT(sz,fnsuffix,instr) \
static inline void __out##fnsuffix (unsigned int val, unsigned int port) \
{ \
unsigned long temp; \
__asm__ __volatile__( \
"cmp %2, #(1<<28)\n\t" \
"mov %0, %2\n\t" \
"addcc %0, %0, %3\n\t" \
"str" instr " %1, [%0, #0 ] @ out" #fnsuffix \
: "=&r" (temp) \
: "r" (val), "r" (port), "Ir" (PCIO_BASE_##fnsuffix) \
: "cc"); \
}
#define DECLARE_DYN_IN(sz,fnsuffix,instr) \
static inline unsigned sz __in##fnsuffix (unsigned int port) \
{ \
unsigned long temp, value; \
__asm__ __volatile__( \
"cmp %2, #(1<<28)\n\t" \
"mov %0, %2\n\t" \
"addcc %0, %0, %3\n\t" \
"ldr" instr " %1, [%0, #0 ] @ in" #fnsuffix \
: "=&r" (temp), "=r" (value) \
: "r" (port), "Ir" (PCIO_BASE_##fnsuffix) \
: "cc"); \
return (unsigned sz)value; \
}
static inline void __iomem *__ioaddr (unsigned long port)
{
return __PORT_PCIO(port) ? (PCIO_BASE + port) : (void __iomem *)port;
}
#define DECLARE_IO(sz,fnsuffix,instr) \
DECLARE_DYN_IN(sz,fnsuffix,instr) \
DECLARE_DYN_OUT(sz,fnsuffix,instr)
DECLARE_IO(char,b,"b")
DECLARE_IO(short,w,"h")
DECLARE_IO(int,l,"")
#undef DECLARE_IO
#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) \
({ \
if (__PORT_PCIO((port))) \
__asm__ __volatile__( \
"strb %0, [%1, %2] @ outbc" \
: : "r" (value), "r" (PCIO_BASE), "Jr" ((port))); \
else \
__asm__ __volatile__( \
"strb %0, [%1, #0] @ outbc" \
: : "r" (value), "r" ((port))); \
})
#define __inbc(port) \
({ \
unsigned char result; \
if (__PORT_PCIO((port))) \
__asm__ __volatile__( \
"ldrb %0, [%1, %2] @ inbc" \
: "=r" (result) : "r" (PCIO_BASE), "Jr" ((port))); \
else \
__asm__ __volatile__( \
"ldrb %0, [%1, #0] @ inbc" \
: "=r" (result) : "r" ((port))); \
result; \
})
#define __outwc(value,port) \
({ \
unsigned long v = value; \
if (__PORT_PCIO((port))) { \
if ((port) < 256 && (port) > -256) \
__asm__ __volatile__( \
"strh %0, [%1, %2] @ outwc" \
: : "r" (v), "r" (PCIO_BASE), "Jr" ((port))); \
else if ((port) > 0) \
__asm__ __volatile__( \
"strh %0, [%1, %2] @ outwc" \
: : "r" (v), \
"r" (PCIO_BASE + ((port) & ~0xff)), \
"Jr" (((port) & 0xff))); \
else \
__asm__ __volatile__( \
"strh %0, [%1, #0] @ outwc" \
: : "r" (v), \
"r" (PCIO_BASE + (port))); \
} else \
__asm__ __volatile__( \
"strh %0, [%1, #0] @ outwc" \
: : "r" (v), "r" ((port))); \
})
#define __inwc(port) \
({ \
unsigned short result; \
if (__PORT_PCIO((port))) { \
if ((port) < 256 && (port) > -256 ) \
__asm__ __volatile__( \
"ldrh %0, [%1, %2] @ inwc" \
: "=r" (result) \
: "r" (PCIO_BASE), \
"Jr" ((port))); \
else if ((port) > 0) \
__asm__ __volatile__( \
"ldrh %0, [%1, %2] @ inwc" \
: "=r" (result) \
: "r" (PCIO_BASE + ((port) & ~0xff)), \
"Jr" (((port) & 0xff))); \
else \
__asm__ __volatile__( \
"ldrh %0, [%1, #0] @ inwc" \
: "=r" (result) \
: "r" (PCIO_BASE + ((port)))); \
} else \
__asm__ __volatile__( \
"ldrh %0, [%1, #0] @ inwc" \
: "=r" (result) : "r" ((port))); \
result; \
})
#define __outlc(value,port) \
({ \
unsigned long v = value; \
if (__PORT_PCIO((port))) \
__asm__ __volatile__( \
"str %0, [%1, %2] @ outlc" \
: : "r" (v), "r" (PCIO_BASE), "Jr" ((port))); \
else \
__asm__ __volatile__( \
"str %0, [%1, #0] @ outlc" \
: : "r" (v), "r" ((port))); \
})
#define __inlc(port) \
({ \
unsigned long result; \
if (__PORT_PCIO((port))) \
__asm__ __volatile__( \
"ldr %0, [%1, %2] @ inlc" \
: "=r" (result) : "r" (PCIO_BASE), "Jr" ((port))); \
else \
__asm__ __volatile__( \
"ldr %0, [%1, #0] @ inlc" \
: "=r" (result) : "r" ((port))); \
result; \
})
#define __ioaddrc(port) ((__PORT_PCIO(port) ? PCIO_BASE + (port) : (void __iomem *)(port)))
#define inb(p) (__builtin_constant_p((p)) ? __inbc(p) : __inb(p))
#define inw(p) (__builtin_constant_p((p)) ? __inwc(p) : __inw(p))
#define inl(p) (__builtin_constant_p((p)) ? __inlc(p) : __inl(p))
#define outb(v,p) (__builtin_constant_p((p)) ? __outbc(v,p) : __outb(v,p))
#define outw(v,p) (__builtin_constant_p((p)) ? __outwc(v,p) : __outw(v,p))
#define outl(v,p) (__builtin_constant_p((p)) ? __outlc(v,p) : __outl(v,p))
#define __ioaddr(p) (__builtin_constant_p((p)) ? __ioaddr(p) : __ioaddrc(p))
#define insb(p,d,l) __raw_readsb(__ioaddr(p),d,l)
#define insw(p,d,l) __raw_readsw(__ioaddr(p),d,l)
#define insl(p,d,l) __raw_readsl(__ioaddr(p),d,l)
#define outsb(p,d,l) __raw_writesb(__ioaddr(p),d,l)
#define outsw(p,d,l) __raw_writesw(__ioaddr(p),d,l)
#define outsl(p,d,l) __raw_writesl(__ioaddr(p),d,l)
#endif