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/*
* linux/include/asm-arm/arch-shark/io.h
*
* by Alexander Schulz
*
* derived from:
* linux/include/asm-arm/arch-ebsa110/io.h
* Copyright (C) 1997,1998 Russell King
*/
#ifndef __ASM_ARM_ARCH_IO_H
#define __ASM_ARM_ARCH_IO_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 0x80000000+
* and are translated to the start of IO.
*/
#define __PORT_PCIO(x) (!((x) & 0x80000000))
/*
* Dynamic IO functions - let the compiler
* optimize the expressions
*/
#define DECLARE_DYN_OUT(fnsuffix,instr) \
static inline void __out##fnsuffix (unsigned int value, unsigned int port) \
{ \
unsigned long temp; \
__asm__ __volatile__( \
"tst %2, #0x80000000\n\t" \
"mov %0, %4\n\t" \
"addeq %0, %0, %3\n\t" \
"str" instr " %1, [%0, %2] @ out" #fnsuffix \
: "=&r" (temp) \
: "r" (value), "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE) \
: "cc"); \
}
#define DECLARE_DYN_IN(sz,fnsuffix,instr) \
static inline unsigned sz __in##fnsuffix (unsigned int port) \
{ \
unsigned long temp, value; \
__asm__ __volatile__( \
"tst %2, #0x80000000\n\t" \
"mov %0, %4\n\t" \
"addeq %0, %0, %3\n\t" \
"ldr" instr " %1, [%0, %2] @ in" #fnsuffix \
: "=&r" (temp), "=r" (value) \
: "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE) \
: "cc"); \
return (unsigned sz)value; \
}
static inline unsigned int __ioaddr (unsigned int port) \
{ \
if (__PORT_PCIO(port)) \
return (unsigned int)(PCIO_BASE + (port)); \
else \
return (unsigned int)(IO_BASE + (port)); \
}
#define DECLARE_IO(sz,fnsuffix,instr) \
DECLARE_DYN_OUT(fnsuffix,instr) \
DECLARE_DYN_IN(sz,fnsuffix,instr)
DECLARE_IO(char,b,"b")
DECLARE_IO(short,w,"h")
DECLARE_IO(long,l,"")
#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) \
({ \
if (__PORT_PCIO((port))) \
__asm__ __volatile__( \
"strb %0, [%1, %2] @ outbc" \
: : "r" (value), "r" (PCIO_BASE), "Jr" (port)); \
else \
__asm__ __volatile__( \
"strb %0, [%1, %2] @ outbc" \
: : "r" (value), "r" (IO_BASE), "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, %2] @ inbc" \
: "=r" (result) : "r" (IO_BASE), "r" (port)); \
result; \
})
#define __outwc(value,port) \
({ \
unsigned long v = value; \
if (__PORT_PCIO((port))) \
__asm__ __volatile__( \
"strh %0, [%1, %2] @ outwc" \
: : "r" (v|v<<16), "r" (PCIO_BASE), "Jr" (port)); \
else \
__asm__ __volatile__( \
"strh %0, [%1, %2] @ outwc" \
: : "r" (v|v<<16), "r" (IO_BASE), "r" (port)); \
})
#define __inwc(port) \
({ \
unsigned short result; \
if (__PORT_PCIO((port))) \
__asm__ __volatile__( \
"ldrh %0, [%1, %2] @ inwc" \
: "=r" (result) : "r" (PCIO_BASE), "Jr" (port)); \
else \
__asm__ __volatile__( \
"ldrh %0, [%1, %2] @ inwc" \
: "=r" (result) : "r" (IO_BASE), "r" (port)); \
result & 0xffff; \
})
#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, %2] @ outlc" \
: : "r" (v), "r" (IO_BASE), "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, %2] @ inlc" \
: "=r" (result) : "r" (IO_BASE), "r" (port)); \
result; \
})
#define __ioaddrc(port) \
({ \
unsigned long addr; \
if (__PORT_PCIO((port))) \
addr = PCIO_BASE + (port); \
else \
addr = IO_BASE + (port); \
addr; \
})
#define __mem_pci(addr) (addr)
#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))
/*
* 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))
#endif
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