[PATCH v3 15/18] MIPS: JZ4770: Work around config2 misreporting associativity
From: Paul Cercueil <paul@crapouillou.net>
Date: 2017-07-02 16:31:48
Also in:
linux-clk, linux-mips, lkml
Subsystem:
mips, the rest · Maintainers:
Thomas Bogendoerfer, Linus Torvalds
From: Maarten ter Huurne <redacted> According to config2, the associativity would be 5-ways, but the documentation states 4-ways, which also matches the documented L2 cache size of 256 kB. Signed-off-by: Maarten ter Huurne <redacted> --- arch/mips/mm/sc-mips.c | 9 +++++++++ 1 file changed, 9 insertions(+) v2: No change v3: No change
diff --git a/arch/mips/mm/sc-mips.c b/arch/mips/mm/sc-mips.c
index c909c3342729..67a3b4d88580 100644
--- a/arch/mips/mm/sc-mips.c
+++ b/arch/mips/mm/sc-mips.c@@ -15,6 +15,7 @@ #include <asm/mmu_context.h> #include <asm/r4kcache.h> #include <asm/mips-cm.h> +#include <asm/bootinfo.h> /* * MIPS32/MIPS64 L2 cache handling
@@ -228,6 +229,14 @@ static inline int __init mips_sc_probe(void) else return 0; + /* + * According to config2 it would be 5-ways, but that is contradicted + * by all documentation. + */ + if (current_cpu_type() == CPU_JZRISC && + mips_machtype == MACH_INGENIC_JZ4770) + c->scache.ways = 4; + c->scache.waysize = c->scache.sets * c->scache.linesz; c->scache.waybit = __ffs(c->scache.waysize);
--
2.11.0