Commit 4d1b3ac8 authored by Tiezhu Yang's avatar Tiezhu Yang Committed by Thomas Bogendoerfer
Browse files

MIPS: Loongson64: Do not write the read only field LPA of CP0_CONFIG3 



The field LPA of CP0_CONFIG3 register is read only for Loongson64, so the
write operations are meaningless, remove them.

Signed-off-by: default avatarTiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: default avatarThomas Bogendoerfer <tsbogend@alpha.franken.de>
parent 4abaacc7

arch/mips/include/asm/mach-loongson64/kernel-entry-init.h

+0 −8
Original line number Diff line number Diff line
@@ -19,10 +19,6 @@ 
	.macro	kernel_entry_setup

	.set	push

	.set	mips64

	/* Set LPA on LOONGSON3 config3 */

	mfc0	t0, CP0_CONFIG3

	or	t0, (0x1 << 7)

	mtc0	t0, CP0_CONFIG3

	/* Set ELPA on LOONGSON3 pagegrain */

	mfc0	t0, CP0_PAGEGRAIN

	or	t0, (0x1 << 29)
@@ -54,10 +50,6 @@ 
	.macro	smp_slave_setup

	.set	push

	.set	mips64

	/* Set LPA on LOONGSON3 config3 */

	mfc0	t0, CP0_CONFIG3

	or	t0, (0x1 << 7)

	mtc0	t0, CP0_CONFIG3

	/* Set ELPA on LOONGSON3 pagegrain */

	mfc0	t0, CP0_PAGEGRAIN

	or	t0, (0x1 << 29)

arch/mips/loongson64/numa.c

+0 −3
Original line number Diff line number Diff line
@@ -39,9 +39,6 @@ static void enable_lpa(void) 
{

	unsigned long value;



	value = __read_32bit_c0_register($16, 3);

	value |= 0x00000080;

	__write_32bit_c0_register($16, 3, value);

	value = __read_32bit_c0_register($16, 3);

	pr_info("CP0_Config3: CP0 16.3 (0x%lx)\n", value);