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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/cris/include/asm/page.h | |
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/cris/include/asm/page.h')
-rw-r--r-- | kernel/arch/cris/include/asm/page.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/kernel/arch/cris/include/asm/page.h b/kernel/arch/cris/include/asm/page.h new file mode 100644 index 000000000..dfc53f9b8 --- /dev/null +++ b/kernel/arch/cris/include/asm/page.h @@ -0,0 +1,73 @@ +#ifndef _CRIS_PAGE_H +#define _CRIS_PAGE_H + +#include <arch/page.h> +#include <linux/const.h> + +/* PAGE_SHIFT determines the page size */ +#define PAGE_SHIFT 13 +#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) +#define PAGE_MASK (~(PAGE_SIZE-1)) + +#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) +#define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) + +#define clear_user_page(page, vaddr, pg) clear_page(page) +#define copy_user_page(to, from, vaddr, pg) copy_page(to, from) + +#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ + alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) +#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE + +/* + * These are used to make use of C type-checking.. + */ +#ifndef __ASSEMBLY__ +typedef struct { unsigned long pte; } pte_t; +typedef struct { unsigned long pgd; } pgd_t; +typedef struct { unsigned long pgprot; } pgprot_t; +typedef struct page *pgtable_t; +#endif + +#define pte_val(x) ((x).pte) +#define pgd_val(x) ((x).pgd) +#define pgprot_val(x) ((x).pgprot) + +#define __pte(x) ((pte_t) { (x) } ) +#define __pgd(x) ((pgd_t) { (x) } ) +#define __pgprot(x) ((pgprot_t) { (x) } ) + +/* On CRIS the PFN numbers doesn't start at 0 so we have to compensate */ +/* for that before indexing into the page table starting at mem_map */ +#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) +#define pfn_valid(pfn) (((pfn) - (PAGE_OFFSET >> PAGE_SHIFT)) < max_mapnr) + +/* to index into the page map. our pages all start at physical addr PAGE_OFFSET so + * we can let the map start there. notice that we subtract PAGE_OFFSET because + * we start our mem_map there - in other ports they map mem_map physically and + * use __pa instead. in our system both the physical and virtual address of DRAM + * is too high to let mem_map start at 0, so we do it this way instead (similar + * to arm and m68k I think) + */ + +#define virt_to_page(kaddr) (mem_map + (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT)) +#define virt_addr_valid(kaddr) pfn_valid((unsigned)(kaddr) >> PAGE_SHIFT) + +/* convert a page (based on mem_map and forward) to a physical address + * do this by figuring out the virtual address and then use __pa + */ + +#define page_to_phys(page) __pa((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET) + +#ifndef __ASSEMBLY__ + +#endif /* __ASSEMBLY__ */ + +#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ + VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) + +#include <asm-generic/memory_model.h> +#include <asm-generic/getorder.h> + +#endif /* _CRIS_PAGE_H */ + |