evie/android_kernel_oneplus_msm8998
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sh: Kill off broken direct-mapped cache mode.

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Forcing direct-mapped worked on certain older 2-way set associative
parts, but was always error prone on 4-way parts. As these are the
norm these days, there is not much point in continuing to support this
mode. Most of the folks that used direct-mapped mode generally just
wanted writethrough caching in the first place..

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2009-04-02 17:40:16 +09:00
parent e869a90ee1
commit e8208828dc
2 changed files with 0 additions and 17 deletions
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5
arch/sh/kernel/cpu/sh4/probe.c
View file

@ -199,11 +199,6 @@ int __init detect_cpu_and_cache_system(void)
break; break;
} }
#ifdef CONFIG_SH_DIRECT_MAPPED
boot_cpu_data.icache.ways = 1;
boot_cpu_data.dcache.ways = 1;
#endif
#ifdef CONFIG_CPU_HAS_PTEA #ifdef CONFIG_CPU_HAS_PTEA
boot_cpu_data.flags |= CPU_HAS_PTEA; boot_cpu_data.flags |= CPU_HAS_PTEA;
#endif #endif

12
arch/sh/mm/Kconfig
View file

@ -251,18 +251,6 @@ config SH7705_CACHE_32KB
depends on CPU_SUBTYPE_SH7705 depends on CPU_SUBTYPE_SH7705
default y default y
config SH_DIRECT_MAPPED
bool "Use direct-mapped caching"
default n
help
Selecting this option will configure the caches to be direct-mapped,
even if the cache supports a 2 or 4-way mode. This is useful primarily
for debugging on platforms with 2 and 4-way caches (SH7750R/SH7751R,
SH4-202, SH4-501, etc.)
Turn this option off for platforms that do not have a direct-mapped
cache, and you have no need to run the caches in such a configuration.
choice choice
prompt "Cache mode" prompt "Cache mode"
default CACHE_WRITEBACK if CPU_SH2A || CPU_SH3 || CPU_SH4 || CPU_SH5 default CACHE_WRITEBACK if CPU_SH2A || CPU_SH3 || CPU_SH4 || CPU_SH5