Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit eb482875 authored by Thiemo Seufer's avatar Thiemo Seufer Committed by Ralf Baechle
Browse files

[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: default avatarThiemo Seufer <ths@networkno.de>
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 0f9005a6

arch/mips/mm/c-sb1.c

+21 −1
Original line number Diff line number Diff line
@@ -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;