From fd1bb4c9fc2c3df4d226acd2c277f479600cf7e0 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Wed, 25 Jun 2014 16:41:13 -0700 Subject: MIPS: Document the cca= command-line parameter Commit 351336929ccf222ae38ff0cb7a8dd5fd5c6236a0 ("[MIPS] Allow setting of the cache attribute at run time") introduced the 'cca=' kernel command-line parameter which allows overriding the kernel pages cacheable attributes, document that parameter. [ralf@linux-mips.org: replace @mips.com email addresses with it's imgtec.com equivalent in this commit message. Rephrase slightly for a bit more pedantic correctness.] Signed-off-by: Florian Fainelli Cc: linux-mips@linux-mips.org Cc: blogic@openwrt.org Cc: anemo@mba.ocn.ne.jp Cc: chris.dearman@imgtec.com Patchwork: https://patchwork.linux-mips.org/patch/7182/ Signed-off-by: Ralf Baechle --- Documentation/kernel-parameters.txt | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'Documentation/kernel-parameters.txt') diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index c1b9aa8c5a52..ea4f2dfba19a 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -566,6 +566,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted. possible to determine what the correct size should be. This option provides an override for these situations. + cca= [MIPS] Override the kernel pages' cache coherency + algorithm. Accepted values range from 0 to 7 + inclusive. See arch/mips/include/asm/pgtable-bits.h + for platform specific values (SB1, Loongson3 and + others). + ccw_timeout_log [S390] See Documentation/s390/CommonIO for details. -- cgit v1.2.3-59-g8ed1b