Inline ioremap() calls for constant addresses that map to KSEG1.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Maciej W. Rozycki 2005-06-30 10:48:40 +00:00 committed by Ralf Baechle
parent c134a5ecdb
commit c3455b0efc
5 changed files with 86 additions and 15 deletions

View File

@ -155,7 +155,7 @@ void __init plat_setup(void)
#if defined(CONFIG_64BIT_PHYS_ADDR)
/* This routine should be valid for all Au1x based boards */
phys_t fixup_bigphys_addr(phys_t phys_addr, phys_t size)
phys_t __fixup_bigphys_addr(phys_t phys_addr, phys_t size)
{
u32 start, end;

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@ -101,15 +101,6 @@ static int remap_area_pages(unsigned long address, phys_t phys_addr,
return error;
}
/*
* Allow physical addresses to be fixed up to help 36 bit peripherals.
*/
phys_t __attribute__ ((weak))
fixup_bigphys_addr(phys_t phys_addr, phys_t size)
{
return phys_addr;
}
/*
* Generic mapping function (not visible outside):
*/
@ -126,7 +117,7 @@ fixup_bigphys_addr(phys_t phys_addr, phys_t size)
#define IS_LOW512(addr) (!((phys_t)(addr) & (phys_t) ~0x1fffffffULL))
void * __ioremap(phys_t phys_addr, phys_t size, unsigned long flags)
void __iomem * __ioremap(phys_t phys_addr, phys_t size, unsigned long flags)
{
struct vm_struct * area;
unsigned long offset;
@ -146,7 +137,7 @@ void * __ioremap(phys_t phys_addr, phys_t size, unsigned long flags)
*/
if (IS_LOW512(phys_addr) && IS_LOW512(last_addr) &&
flags == _CACHE_UNCACHED)
return (void *) CKSEG1ADDR(phys_addr);
return (void __iomem *) CKSEG1ADDR(phys_addr);
/*
* Don't allow anybody to remap normal RAM that we're using..
@ -182,7 +173,7 @@ void * __ioremap(phys_t phys_addr, phys_t size, unsigned long flags)
return NULL;
}
return (void *) (offset + (char *)addr);
return (void __iomem *) (offset + (char *)addr);
}
#define IS_KSEG1(addr) (((unsigned long)(addr) & ~0x1fffffffUL) == CKSEG1)

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@ -27,6 +27,7 @@
#include <asm/processor.h>
#include <asm/string.h>
#include <ioremap.h>
#include <mangle-port.h>
/*
@ -209,6 +210,8 @@ extern void __iounmap(volatile void __iomem *addr);
static inline void __iomem * __ioremap_mode(phys_t offset, unsigned long size,
unsigned long flags)
{
#define __IS_LOW512(addr) (!((phys_t)(addr) & (phys_t) ~0x1fffffffULL))
if (cpu_has_64bit_addresses) {
u64 base = UNCAC_BASE;
@ -219,9 +222,29 @@ static inline void __iomem * __ioremap_mode(phys_t offset, unsigned long size,
if (flags == _CACHE_UNCACHED)
base = (u64) IO_BASE;
return (void __iomem *) (unsigned long) (base + offset);
} else if (__builtin_constant_p(offset) &&
__builtin_constant_p(size) && __builtin_constant_p(flags)) {
phys_t phys_addr, last_addr;
phys_addr = fixup_bigphys_addr(offset, size);
/* Don't allow wraparound or zero size. */
last_addr = phys_addr + size - 1;
if (!size || last_addr < phys_addr)
return NULL;
/*
* Map uncached objects in the low 512MB of address
* space using KSEG1.
*/
if (__IS_LOW512(phys_addr) && __IS_LOW512(last_addr) &&
flags == _CACHE_UNCACHED)
return (void __iomem *)CKSEG1ADDR(phys_addr);
}
return __ioremap(offset, size, flags);
#undef __IS_LOW512
}
/*
@ -273,12 +296,16 @@ static inline void __iomem * __ioremap_mode(phys_t offset, unsigned long size,
static inline void iounmap(volatile void __iomem *addr)
{
if (cpu_has_64bit_addresses)
#define __IS_KSEG1(addr) (((unsigned long)(addr) & ~0x1fffffffUL) == CKSEG1)
if (cpu_has_64bit_addresses ||
(__builtin_constant_p(addr) && __IS_KSEG1(addr)))
return;
__iounmap(addr);
}
#undef __IS_KSEG1
}
#define __BUILD_MEMORY_SINGLE(pfx, bwlq, type, irq) \
\

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@ -0,0 +1,30 @@
/*
* include/asm-mips/mach-au1x00/ioremap.h
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef __ASM_MACH_AU1X00_IOREMAP_H
#define __ASM_MACH_AU1X00_IOREMAP_H
#include <linux/config.h>
#include <linux/types.h>
#ifndef CONFIG_64BIT_PHYS_ADDR
static inline phys_t __fixup_bigphys_addr(phys_t phys_addr, phys_t size)
{
return phys_addr;
}
#endif
/*
* Allow physical addresses to be fixed up to help 36-bit peripherals.
*/
static inline phys_t fixup_bigphys_addr(phys_t phys_addr, phys_t size)
{
return __fixup_bigphys_addr(phys_addr, size);
}
#endif /* __ASM_MACH_AU1X00_IOREMAP_H */

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@ -0,0 +1,23 @@
/*
* include/asm-mips/mach-generic/ioremap.h
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef __ASM_MACH_GENERIC_IOREMAP_H
#define __ASM_MACH_GENERIC_IOREMAP_H
#include <linux/types.h>
/*
* Allow physical addresses to be fixed up to help peripherals located
* outside the low 32-bit range -- generic pass-through version.
*/
static inline phys_t fixup_bigphys_addr(phys_t phys_addr, phys_t size)
{
return phys_addr;
}
#endif /* __ASM_MACH_GENERIC_IOREMAP_H */