diff options
Diffstat (limited to 'target/linux/ramips/patches-3.10/0204-MIPS-74K-1074K-Correct-erratum-workaround.patch')
| -rw-r--r-- | target/linux/ramips/patches-3.10/0204-MIPS-74K-1074K-Correct-erratum-workaround.patch | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/target/linux/ramips/patches-3.10/0204-MIPS-74K-1074K-Correct-erratum-workaround.patch b/target/linux/ramips/patches-3.10/0204-MIPS-74K-1074K-Correct-erratum-workaround.patch deleted file mode 100644 index 0a80ea5..0000000 --- a/target/linux/ramips/patches-3.10/0204-MIPS-74K-1074K-Correct-erratum-workaround.patch +++ /dev/null @@ -1,60 +0,0 @@ -From 3da3528448850ccde412d52fb939575641ada80d Mon Sep 17 00:00:00 2001 -From: "Maciej W. Rozycki" <macro@linux-mips.org> -Date: Wed, 18 Sep 2013 19:08:15 +0100 -Subject: [PATCH 204/215] MIPS: 74K/1074K: Correct erratum workaround. - -Make sure 74K revision numbers are not applied to the 1074K. Also catch -invalid usage. - -Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> -Cc: Steven J. Hill <Steven.Hill@imgtec.com> -Cc: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> -Cc: linux-mips@linux-mips.org -Patchwork: https://patchwork.linux-mips.org/patch/5857/ -Signed-off-by: Ralf Baechle <ralf@linux-mips.org> -(cherry picked from commit 9213ad77070ea75fc3a5e43e3d9e9c4146e4930a) ---- - arch/mips/mm/c-r4k.c | 26 ++++++++++++++++++-------- - 1 file changed, 18 insertions(+), 8 deletions(-) - ---- a/arch/mips/mm/c-r4k.c -+++ b/arch/mips/mm/c-r4k.c -@@ -785,20 +785,30 @@ static inline void rm7k_erratum31(void) - - static inline void alias_74k_erratum(struct cpuinfo_mips *c) - { -+ unsigned int imp = c->processor_id & 0xff00; -+ unsigned int rev = c->processor_id & PRID_REV_MASK; -+ - /* - * Early versions of the 74K do not update the cache tags on a - * vtag miss/ptag hit which can occur in the case of KSEG0/KUSEG - * aliases. In this case it is better to treat the cache as always - * having aliases. - */ -- if ((c->processor_id & 0xff) <= PRID_REV_ENCODE_332(2, 4, 0)) -- c->dcache.flags |= MIPS_CACHE_VTAG; -- if ((c->processor_id & 0xff) == PRID_REV_ENCODE_332(2, 4, 0)) -- write_c0_config6(read_c0_config6() | MIPS_CONF6_SYND); -- if (((c->processor_id & 0xff00) == PRID_IMP_1074K) && -- ((c->processor_id & 0xff) <= PRID_REV_ENCODE_332(1, 1, 0))) { -- c->dcache.flags |= MIPS_CACHE_VTAG; -- write_c0_config6(read_c0_config6() | MIPS_CONF6_SYND); -+ switch (imp) { -+ case PRID_IMP_74K: -+ if (rev <= PRID_REV_ENCODE_332(2, 4, 0)) -+ c->dcache.flags |= MIPS_CACHE_VTAG; -+ if (rev == PRID_REV_ENCODE_332(2, 4, 0)) -+ write_c0_config6(read_c0_config6() | MIPS_CONF6_SYND); -+ break; -+ case PRID_IMP_1074K: -+ if (rev <= PRID_REV_ENCODE_332(1, 1, 0)) { -+ c->dcache.flags |= MIPS_CACHE_VTAG; -+ write_c0_config6(read_c0_config6() | MIPS_CONF6_SYND); -+ } -+ break; -+ default: -+ BUG(); - } - } - |