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Diffstat (limited to 'tboot/include/page.h')
| -rw-r--r-- | tboot/include/page.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/tboot/include/page.h b/tboot/include/page.h new file mode 100644 index 0000000..b0588f6 --- /dev/null +++ b/tboot/include/page.h @@ -0,0 +1,66 @@ +/* + * page.h: definitions for page size/mask/shift/etc. + * + * Copyright (c) 2010, Intel Corporation + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * * Neither the name of the Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef __PAGE_H__ +#define __PAGE_H__ + +/* From http://fxr.watson.org/fxr/source/i386/include/param.h */ +#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ +#define PAGE_SIZE (1 << PAGE_SHIFT) /* bytes/page */ +/* PAGE_MASK is used to pass bits 12 and above. */ +#define PAGE_MASK (~(PAGE_SIZE-1)) + +/* This is used to address the L2's 4MB pages */ +/* From figure 4-3 of IA64/IA32 Arch SDM vol 3A */ +#define FOURMB_PAGE_SHIFT 22 + +/* macros to rounds things up/down to a page/pfn */ +#define PAGE_UP(p) (((unsigned long long)(p) + PAGE_SIZE- 1) & PAGE_MASK) +#define PAGE_DOWN(p) ((unsigned long long)(p) & PAGE_MASK) +#define PFN_DOWN(x) ((x) >> PAGE_SHIFT) +#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT) + +#endif /* __PAGE_H__ */ + + +/* + * Local variables: + * mode: C + * c-set-style: "BSD" + * c-basic-offset: 4 + * tab-width: 4 + * indent-tabs-mode: nil + * End: + */ |