From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- arch/sh/mm/cache-sh2.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 arch/sh/mm/cache-sh2.c (limited to 'arch/sh/mm/cache-sh2.c') diff --git a/arch/sh/mm/cache-sh2.c b/arch/sh/mm/cache-sh2.c new file mode 100644 index 000000000000..2689cb24ea2b --- /dev/null +++ b/arch/sh/mm/cache-sh2.c @@ -0,0 +1,50 @@ +/* + * arch/sh/mm/cache-sh2.c + * + * Copyright (C) 2002 Paul Mundt + * + * Released under the terms of the GNU GPL v2.0. + */ +#include +#include + +#include +#include +#include +#include +#include + +/* + * Calculate the OC address and set the way bit on the SH-2. + * + * We must have already jump_to_P2()'ed prior to calling this + * function, since we rely on CCR manipulation to do the + * Right Thing(tm). + */ +unsigned long __get_oc_addr(unsigned long set, unsigned long way) +{ + unsigned long ccr; + + /* + * On SH-2 the way bit isn't tracked in the address field + * if we're doing address array access .. instead, we need + * to manually switch out the way in the CCR. + */ + ccr = ctrl_inl(CCR); + ccr &= ~0x00c0; + ccr |= way << cpu_data->dcache.way_shift; + + /* + * Despite the number of sets being halved, we end up losing + * the first 2 ways to OCRAM instead of the last 2 (if we're + * 4-way). As a result, forcibly setting the W1 bit handily + * bumps us up 2 ways. + */ + if (ccr & CCR_CACHE_ORA) + ccr |= 1 << (cpu_data->dcache.way_shift + 1); + + ctrl_outl(ccr, CCR); + + return CACHE_OC_ADDRESS_ARRAY | (set << cpu_data->dcache.entry_shift); +} + -- cgit v1.2.2