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[MIPS] Hack for SB1 cache issues 

Removing flush_icache_page a while ago broke SB1 which was using an empty
flush_data_cache_page function.  This glues things well enough so a more
efficient but also more intrusive solution can be found later.

Signed-Off-By: Thiemo Seufer <ths@networkno.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Thiemo Seufer 2006-11-16 22:13:54 +00:00 committed by Ralf Baechle
parent 0f9005a6f7
commit eb48287508
1 changed files with 21 additions and 1 deletions
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22
arch/mips/mm/c-sb1.c
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@ -19,6 +19,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <linux/init.h>
#include <linux/hardirq.h>
#include <asm/asm.h>
#include <asm/bootinfo.h>
@ -242,6 +243,25 @@ void sb1_flush_cache_page(struct vm_area_struct *vma, unsigned long addr, unsign
__attribute__((alias("local_sb1_flush_cache_page")));
#endif
#ifdef CONFIG_SMP
static void sb1_flush_cache_data_page_ipi(void *info)
{
unsigned long start = (unsigned long)info;
__sb1_writeback_inv_dcache_range(start, start + PAGE_SIZE);
}
static void sb1_flush_cache_data_page(unsigned long addr)
{
if (in_atomic())
__sb1_writeback_inv_dcache_range(addr, addr + PAGE_SIZE);
else
on_each_cpu(sb1_flush_cache_data_page_ipi, (void *) addr, 1, 1);
}
#else
void sb1_flush_cache_data_page(unsigned long)
__attribute__((alias("local_sb1_flush_cache_data_page")));
#endif
/*
* Invalidate all caches on this CPU
@ -481,7 +501,7 @@ void sb1_cache_init(void)
flush_cache_sigtramp = sb1_flush_cache_sigtramp;
local_flush_data_cache_page = (void *) sb1_nop;
flush_data_cache_page = (void *) sb1_nop;
flush_data_cache_page = sb1_flush_cache_data_page;
/* Full flush */
__flush_cache_all = sb1___flush_cache_all;