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author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-19 11:36:03 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-19 11:36:03 -0700 |
commit | 7c7cbaf5b82c418cd3b1dcf718f71d0e6057e639 (patch) | |
tree | da9aaa5a246af464b1e10d88618c1cad07b76314 /arch/sh/mm/cache-shx3.c | |
parent | ba0234ec35127fe21d373db53cbaf9fe20620cb6 (diff) | |
parent | 4d0956b8f597aac10208ca763f8fe641fde16aab (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (127 commits)
sh: update defconfigs.
sh: Fix up the NUMA build for recent LMB changes.
sh64: provide a stub per_cpu_trap_init() definition.
sh: fix up CONFIG_KEXEC=n build.
sh: fixup the docbook paths for clock framework shuffling.
driver core: Early dev_name() depends on slab_is_available().
sh: simplify WARN usage in SH clock driver
sh: Check return value of clk_get on ms7724
sh: Check return value of clk_get on ecovec24
sh: move sh clock-cpg.c contents to drivers/sh/clk-cpg.c
sh: move sh clock.c contents to drivers/sh/clk.
sh: move sh asm/clock.h contents to linux/sh_clk.h V2
sh: remove unused clock lookup
sh: switch boards to clkdev
sh: switch sh4-202 to clkdev
sh: switch shx3 to clkdev
sh: switch sh7757 to clkdev
sh: switch sh7763 to clkdev
sh: switch sh7780 to clkdev
sh: switch sh7786 to clkdev
...
Diffstat (limited to 'arch/sh/mm/cache-shx3.c')
-rw-r--r-- | arch/sh/mm/cache-shx3.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/sh/mm/cache-shx3.c b/arch/sh/mm/cache-shx3.c new file mode 100644 index 00000000000..c0adbee97b5 --- /dev/null +++ b/arch/sh/mm/cache-shx3.c @@ -0,0 +1,44 @@ +/* + * arch/sh/mm/cache-shx3.c - SH-X3 optimized cache ops + * + * Copyright (C) 2010 Paul Mundt + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/io.h> +#include <asm/cache.h> + +#define CCR_CACHE_SNM 0x40000 /* Hardware-assisted synonym avoidance */ +#define CCR_CACHE_IBE 0x1000000 /* ICBI broadcast */ + +void __init shx3_cache_init(void) +{ + unsigned int ccr; + + ccr = __raw_readl(CCR); + + /* + * If we've got cache aliases, resolve them in hardware. + */ + if (boot_cpu_data.dcache.n_aliases || boot_cpu_data.icache.n_aliases) { + ccr |= CCR_CACHE_SNM; + + boot_cpu_data.icache.n_aliases = 0; + boot_cpu_data.dcache.n_aliases = 0; + + pr_info("Enabling hardware synonym avoidance\n"); + } + +#ifdef CONFIG_SMP + /* + * Broadcast I-cache block invalidations by default. + */ + ccr |= CCR_CACHE_IBE; +#endif + + writel_uncached(ccr, CCR); +} |