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ARM: io: RiscPC: eliminate private inb() et.al. definitions
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As we've got rid of the bit-31 set IO addresses, we can now use the
standard inb() definitions and reduce the IO space limit to 64K.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Russell King committed Aug 17, 2011
1 parent 5e4cdb8 commit 0d26449
Showing 1 changed file with 8 additions and 182 deletions.
190 changes: 8 additions & 182 deletions arch/arm/mach-rpc/include/mach/io.h
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Original file line number Diff line number Diff line change
Expand Up @@ -15,192 +15,18 @@

#include <mach/hardware.h>

#define IO_SPACE_LIMIT 0xffffffff
#define IO_SPACE_LIMIT 0xffff

/*
* 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. Note that all addresses are
* shifted left!
*/
#define __PORT_PCIO(x) (!((x) & 0x80000000))

/*
* Dynamic IO functions.
*/
static inline void __outb (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"
"strb %1, [%0, %2, lsl #2] @ outb"
: "=&r" (temp)
: "r" (value), "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE)
: "cc");
}

static inline void __outw (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 %1, [%0, %2, lsl #2] @ outw"
: "=&r" (temp)
: "r" (value|value<<16), "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE)
: "cc");
}

static inline void __outl (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 %1, [%0, %2, lsl #2] @ outl"
: "=&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, lsl #2] @ in" #fnsuffix \
: "=&r" (temp), "=r" (value) \
: "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE) \
: "cc"); \
return (unsigned sz)value; \
}

static inline void __iomem *__deprecated __ioaddr(unsigned int port)
{
void __iomem *ret;
if (__PORT_PCIO(port))
ret = PCIO_BASE;
else
ret = IO_BASE;
return ret + (port << 2);
}

#define DECLARE_IO(sz,fnsuffix,instr) \
DECLARE_DYN_IN(sz,fnsuffix,instr)

DECLARE_IO(char,b,"b")
DECLARE_IO(short,w,"")
DECLARE_IO(int,l,"")

#undef DECLARE_IO
#undef DECLARE_DYN_IN

/*
* Constant address IO functions
* We need PC style IO addressing for:
* - floppy (at 0x3f2,0x3f4,0x3f5,0x3f7)
* - parport (at 0x278-0x27a, 0x27b-0x27f, 0x778-0x77a)
* - 8250 serial (only for compile)
*
* These have to be macros for the 'J' constraint to work -
* +/-4096 immediate operand.
* These peripherals are found in an area of MMIO which looks very much
* like an ISA bus, but with registers at the low byte of each word.
*/
#define __outbc(value,port) \
({ \
if (__PORT_PCIO((port))) \
__asm__ __volatile__( \
"strb %0, [%1, %2] @ outbc" \
: : "r" (value), "r" (PCIO_BASE), "Jr" ((port) << 2)); \
else \
__asm__ __volatile__( \
"strb %0, [%1, %2] @ outbc" \
: : "r" (value), "r" (IO_BASE), "r" ((port) << 2)); \
})

#define __inbc(port) \
({ \
unsigned char result; \
if (__PORT_PCIO((port))) \
__asm__ __volatile__( \
"ldrb %0, [%1, %2] @ inbc" \
: "=r" (result) : "r" (PCIO_BASE), "Jr" ((port) << 2)); \
else \
__asm__ __volatile__( \
"ldrb %0, [%1, %2] @ inbc" \
: "=r" (result) : "r" (IO_BASE), "r" ((port) << 2)); \
result; \
})

#define __outwc(value,port) \
({ \
unsigned long __v = value; \
if (__PORT_PCIO((port))) \
__asm__ __volatile__( \
"str %0, [%1, %2] @ outwc" \
: : "r" (__v|__v<<16), "r" (PCIO_BASE), "Jr" ((port) << 2)); \
else \
__asm__ __volatile__( \
"str %0, [%1, %2] @ outwc" \
: : "r" (__v|__v<<16), "r" (IO_BASE), "r" ((port) << 2)); \
})

#define __inwc(port) \
({ \
unsigned short result; \
if (__PORT_PCIO((port))) \
__asm__ __volatile__( \
"ldr %0, [%1, %2] @ inwc" \
: "=r" (result) : "r" (PCIO_BASE), "Jr" ((port) << 2)); \
else \
__asm__ __volatile__( \
"ldr %0, [%1, %2] @ inwc" \
: "=r" (result) : "r" (IO_BASE), "r" ((port) << 2)); \
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) << 2)); \
else \
__asm__ __volatile__( \
"str %0, [%1, %2] @ outlc" \
: : "r" (__v), "r" (IO_BASE), "r" ((port) << 2)); \
})

#define __inlc(port) \
({ \
unsigned long result; \
if (__PORT_PCIO((port))) \
__asm__ __volatile__( \
"ldr %0, [%1, %2] @ inlc" \
: "=r" (result) : "r" (PCIO_BASE), "Jr" ((port) << 2)); \
else \
__asm__ __volatile__( \
"ldr %0, [%1, %2] @ inlc" \
: "=r" (result) : "r" (IO_BASE), "r" ((port) << 2)); \
result; \
})

#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 insb(p,d,l) __raw_readsb(__ioaddr(p),d,l)
#define insw(p,d,l) __raw_readsw(__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 __io(a) (PCIO_BASE + ((a) << 2))

/*
* 1:1 mapping for ioremapped regions.
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