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linux-pinenote/arch/sh/include/asm/pgtable-2level.h

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sh: Rename split-level pgtable headers. These were originally named _nopmd and _pmd to follow their asm-generic counterparts, but we rename them to -2level and -3level for general consistency. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-13 19:18:39 +09:00
#ifndef __ASM_SH_PGTABLE_2LEVEL_H
#define __ASM_SH_PGTABLE_2LEVEL_H
sh: Abstract the number of page table levels Keep the dimensions of the page tables in a separate header file in preparation for allowing a three level page table structure. Signed-off-by: Matt Fleming <matt@console-pimps.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-11-25 22:00:08 +00:00
#include <asm-generic/pgtable-nopmd.h>
/*
* traditional two-level paging structure
*/
sh: default to extended TLB support. All SH-X2 and SH-X3 parts support an extended TLB mode, which has been left as experimental since support was originally merged. Now that it's had some time to stabilize and get some exposure to various platforms, we can drop it as an option and default enable it across the board. This is also good future proofing for newer parts that will drop support for the legacy TLB mode completely. This will also force 3-level page tables for all newer parts, which is necessary both for the varying page sizes and larger memories. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-13 19:11:14 +09:00
#define PAGETABLE_LEVELS 2
sh: Abstract the number of page table levels Keep the dimensions of the page tables in a separate header file in preparation for allowing a three level page table structure. Signed-off-by: Matt Fleming <matt@console-pimps.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-11-25 22:00:08 +00:00
/* PTE bits */
sh: default to extended TLB support. All SH-X2 and SH-X3 parts support an extended TLB mode, which has been left as experimental since support was originally merged. Now that it's had some time to stabilize and get some exposure to various platforms, we can drop it as an option and default enable it across the board. This is also good future proofing for newer parts that will drop support for the legacy TLB mode completely. This will also force 3-level page tables for all newer parts, which is necessary both for the varying page sizes and larger memories. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-13 19:11:14 +09:00
#define PTE_MAGNITUDE 2 /* 32-bit PTEs */
sh: Abstract the number of page table levels Keep the dimensions of the page tables in a separate header file in preparation for allowing a three level page table structure. Signed-off-by: Matt Fleming <matt@console-pimps.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-11-25 22:00:08 +00:00
sh: default to extended TLB support. All SH-X2 and SH-X3 parts support an extended TLB mode, which has been left as experimental since support was originally merged. Now that it's had some time to stabilize and get some exposure to various platforms, we can drop it as an option and default enable it across the board. This is also good future proofing for newer parts that will drop support for the legacy TLB mode completely. This will also force 3-level page tables for all newer parts, which is necessary both for the varying page sizes and larger memories. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-13 19:11:14 +09:00
#define PTE_SHIFT PAGE_SHIFT
#define PTE_BITS (PTE_SHIFT - PTE_MAGNITUDE)
sh: Abstract the number of page table levels Keep the dimensions of the page tables in a separate header file in preparation for allowing a three level page table structure. Signed-off-by: Matt Fleming <matt@console-pimps.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-11-25 22:00:08 +00:00
/* PGD bits */
sh: default to extended TLB support. All SH-X2 and SH-X3 parts support an extended TLB mode, which has been left as experimental since support was originally merged. Now that it's had some time to stabilize and get some exposure to various platforms, we can drop it as an option and default enable it across the board. This is also good future proofing for newer parts that will drop support for the legacy TLB mode completely. This will also force 3-level page tables for all newer parts, which is necessary both for the varying page sizes and larger memories. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-13 19:11:14 +09:00
#define PGDIR_SHIFT (PTE_SHIFT + PTE_BITS)
sh: Abstract the number of page table levels Keep the dimensions of the page tables in a separate header file in preparation for allowing a three level page table structure. Signed-off-by: Matt Fleming <matt@console-pimps.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-11-25 22:00:08 +00:00
sh: default to extended TLB support. All SH-X2 and SH-X3 parts support an extended TLB mode, which has been left as experimental since support was originally merged. Now that it's had some time to stabilize and get some exposure to various platforms, we can drop it as an option and default enable it across the board. This is also good future proofing for newer parts that will drop support for the legacy TLB mode completely. This will also force 3-level page tables for all newer parts, which is necessary both for the varying page sizes and larger memories. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-13 19:11:14 +09:00
#define PTRS_PER_PGD (PAGE_SIZE / (1 << PTE_MAGNITUDE))
sh: Abstract the number of page table levels Keep the dimensions of the page tables in a separate header file in preparation for allowing a three level page table structure. Signed-off-by: Matt Fleming <matt@console-pimps.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-11-25 22:00:08 +00:00
#define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE)
sh: Rename split-level pgtable headers. These were originally named _nopmd and _pmd to follow their asm-generic counterparts, but we rename them to -2level and -3level for general consistency. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-13 19:18:39 +09:00
#endif /* __ASM_SH_PGTABLE_2LEVEL_H */
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