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

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

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Tiezhu Yang 2020-11-03 15:12:00 +08:00 committed by Thomas Bogendoerfer
parent 4abaacc704
commit 4d1b3ac886
2 changed files with 0 additions and 11 deletions
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8
arch/mips/include/asm/mach-loongson64/kernel-entry-init.h
View File

@ -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)

3
arch/mips/loongson64/numa.c
View File

@ -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);