diff options
author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/frv/mm/cache-page.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/frv/mm/cache-page.c')
-rw-r--r-- | kernel/arch/frv/mm/cache-page.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/kernel/arch/frv/mm/cache-page.c b/kernel/arch/frv/mm/cache-page.c new file mode 100644 index 000000000..8e09dae0e --- /dev/null +++ b/kernel/arch/frv/mm/cache-page.c @@ -0,0 +1,71 @@ +/* cache-page.c: whole-page cache wrangling functions for MMU linux + * + * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/highmem.h> +#include <linux/module.h> +#include <asm/pgalloc.h> + +/*****************************************************************************/ +/* + * DCF takes a virtual address and the page may not currently have one + * - temporarily hijack a kmap_atomic() slot and attach the page to it + */ +void flush_dcache_page(struct page *page) +{ + unsigned long dampr2; + void *vaddr; + + dampr2 = __get_DAMPR(2); + + vaddr = kmap_atomic_primary(page); + + frv_dcache_writeback((unsigned long) vaddr, (unsigned long) vaddr + PAGE_SIZE); + + kunmap_atomic_primary(vaddr); + + if (dampr2) { + __set_DAMPR(2, dampr2); + __set_IAMPR(2, dampr2); + } + +} /* end flush_dcache_page() */ + +EXPORT_SYMBOL(flush_dcache_page); + +/*****************************************************************************/ +/* + * ICI takes a virtual address and the page may not currently have one + * - so we temporarily attach the page to a bit of virtual space so that is can be flushed + */ +void flush_icache_user_range(struct vm_area_struct *vma, struct page *page, + unsigned long start, unsigned long len) +{ + unsigned long dampr2; + void *vaddr; + + dampr2 = __get_DAMPR(2); + + vaddr = kmap_atomic_primary(page); + + start = (start & ~PAGE_MASK) | (unsigned long) vaddr; + frv_cache_wback_inv(start, start + len); + + kunmap_atomic_primary(vaddr); + + if (dampr2) { + __set_DAMPR(2, dampr2); + __set_IAMPR(2, dampr2); + } + +} /* end flush_icache_user_range() */ + +EXPORT_SYMBOL(flush_icache_user_range); |