[deliverable/linux.git] / arch / sh / mm / uncached.c

#include <linux/init.h>
#include <asm/sizes.h>
#include <asm/page.h>

/*
 * This is the offset of the uncached section from its cached alias.
 *
 * Legacy platforms handle trivial transitions between cached and
 * uncached segments by making use of the 1:1 mapping relationship in
 * 512MB lowmem, others via a special uncached mapping.
 *
 * Default value only valid in 29 bit mode, in 32bit mode this will be
 * updated by the early PMB initialization code.
 */
unsigned long cached_to_uncached = SZ_512M;
unsigned long uncached_size = SZ_512M;
unsigned long uncached_start, uncached_end;

int virt_addr_uncached(unsigned long kaddr)
{
	return (kaddr >= uncached_start) && (kaddr < uncached_end);
}

void __init uncached_init(void)
{
	uncached_start = memory_end;
	uncached_end = uncached_start + uncached_size;
}

void __init uncached_resize(unsigned long size)
{
	uncached_size = size;
	uncached_end = uncached_start + uncached_size;
}
Commit	Line	Data
9edef286 PM	1	#include <linux/init.h>
	2	#include <asm/sizes.h>
	3	#include <asm/page.h>
	4
	5	/*
	6	* This is the offset of the uncached section from its cached alias.
	7	*
	8	* Legacy platforms handle trivial transitions between cached and
	9	* uncached segments by making use of the 1:1 mapping relationship in
	10	* 512MB lowmem, others via a special uncached mapping.
	11	*
	12	* Default value only valid in 29 bit mode, in 32bit mode this will be
	13	* updated by the early PMB initialization code.
	14	*/
	15	unsigned long cached_to_uncached = SZ_512M;
	16	unsigned long uncached_size = SZ_512M;
	17	unsigned long uncached_start, uncached_end;
	18
	19	int virt_addr_uncached(unsigned long kaddr)
	20	{
	21	return (kaddr >= uncached_start) && (kaddr < uncached_end);
	22	}
	23
	24	void __init uncached_init(void)
	25	{
	26	uncached_start = memory_end;
	27	uncached_end = uncached_start + uncached_size;
	28	}
d01447b3 PM	29
	30	void __init uncached_resize(unsigned long size)
	31	{
	32	uncached_size = size;
	33	uncached_end = uncached_start + uncached_size;
	34	}