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linux-sg2042/arch/sh/include/asm/pgtable.h

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
sh: page table alloc cleanups and page fault optimizations. Cleanup of page table allocators, using generic folded PMD and PUD helpers. TLB flushing operations are moved to a more sensible spot. The page fault handler is also optimized slightly, we no longer waste cycles on IRQ disabling for flushing of the page from the ITLB, since we're already under CLI protection by the initial exception handler. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 14:13:36 +08:00
* This file contains the functions and defines necessary to modify and
* use the SuperH page table tree.
*
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
* Copyright (C) 1999 Niibe Yutaka
sh: Split out pgtable.h in to _32 and _64 variants. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-19 17:26:19 +08:00
* Copyright (C) 2002 - 2007 Paul Mundt
sh: page table alloc cleanups and page fault optimizations. Cleanup of page table allocators, using generic folded PMD and PUD helpers. TLB flushing operations are moved to a more sensible spot. The page fault handler is also optimized slightly, we no longer waste cycles on IRQ disabling for flushing of the page from the ITLB, since we're already under CLI protection by the initial exception handler. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 14:13:36 +08:00
*
* 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.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
sh: page table alloc cleanups and page fault optimizations. Cleanup of page table allocators, using generic folded PMD and PUD helpers. TLB flushing operations are moved to a more sensible spot. The page fault handler is also optimized slightly, we no longer waste cycles on IRQ disabling for flushing of the page from the ITLB, since we're already under CLI protection by the initial exception handler. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 14:13:36 +08:00
#ifndef __ASM_SH_PGTABLE_H
#define __ASM_SH_PGTABLE_H
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
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 18:11:14 +08:00
#ifdef CONFIG_X2TLB
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 18:18:39 +08:00
#include <asm/pgtable-3level.h>
sh: Definitions for 3-level page table layout If using 64-bit PTEs and 4K pages then each page table has 512 entries (as opposed to 1024 entries with 32-bit PTEs). Unlike MIPS, SH follows the convention that all structures in the page table (pgd_t, pmd_t, pgprot_t, etc) must be the same size. Therefore, 64-bit PTEs require 64-bit PGD entries, etc. Using 2-levels of page tables and 64-bit PTEs it is only possible to map 1GB of virtual address space. In order to map all 4GB of virtual address space we need to adopt a 3-level page table layout. This actually works out better for CONFIG_SUPERH32 because we only waste 2 PGD entries on the P1 and P2 areas (which are untranslated) instead of 256. Signed-off-by: Matt Fleming <matt@console-pimps.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-12-13 22:38:50 +08:00
#else
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 18:18:39 +08:00
#include <asm/pgtable-2level.h>
sh: Definitions for 3-level page table layout If using 64-bit PTEs and 4K pages then each page table has 512 entries (as opposed to 1024 entries with 32-bit PTEs). Unlike MIPS, SH follows the convention that all structures in the page table (pgd_t, pmd_t, pgprot_t, etc) must be the same size. Therefore, 64-bit PTEs require 64-bit PGD entries, etc. Using 2-levels of page tables and 64-bit PTEs it is only possible to map 1GB of virtual address space. In order to map all 4GB of virtual address space we need to adopt a 3-level page table layout. This actually works out better for CONFIG_SUPERH32 because we only waste 2 PGD entries on the P1 and P2 areas (which are untranslated) instead of 256. Signed-off-by: Matt Fleming <matt@console-pimps.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-12-13 22:38:50 +08:00
#endif
sh: page table alloc cleanups and page fault optimizations. Cleanup of page table allocators, using generic folded PMD and PUD helpers. TLB flushing operations are moved to a more sensible spot. The page fault handler is also optimized slightly, we no longer waste cycles on IRQ disabling for flushing of the page from the ITLB, since we're already under CLI protection by the initial exception handler. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 14:13:36 +08:00
#include <asm/page.h>
sh64: asm/pgtable.h needs asm/mmu.h Needed to satisfy the __in_29bit_mode() check. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-05-31 13:37:44 +08:00
#include <asm/mmu.h>
sh: page table alloc cleanups and page fault optimizations. Cleanup of page table allocators, using generic folded PMD and PUD helpers. TLB flushing operations are moved to a more sensible spot. The page fault handler is also optimized slightly, we no longer waste cycles on IRQ disabling for flushing of the page from the ITLB, since we're already under CLI protection by the initial exception handler. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 14:13:36 +08:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#ifndef __ASSEMBLY__
#include <asm/addrspace.h>
#include <asm/fixmap.h>
/*
* ZERO_PAGE is a global shared page that is always zero: used
* for zero-mapped memory areas etc..
*/
sh: page table alloc cleanups and page fault optimizations. Cleanup of page table allocators, using generic folded PMD and PUD helpers. TLB flushing operations are moved to a more sensible spot. The page fault handler is also optimized slightly, we no longer waste cycles on IRQ disabling for flushing of the page from the ITLB, since we're already under CLI protection by the initial exception handler. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 14:13:36 +08:00
extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
#endif /* !__ASSEMBLY__ */
sh: Split out 29-bit and 32-bit physical mode definitions. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-10 18:16:55 +08:00
/*
* Effective and physical address definitions, to aid with sign
* extension.
*/
#define NEFF 32
#define NEFF_SIGN (1LL << (NEFF - 1))
#define NEFF_MASK (-1LL << NEFF)
sh: Tidy up NEFF-based sign extension for SH-5. This consolidates all of the NEFF-based sign extension for SH-5. In the future the other SH code will need to make use of this as well, so make it generic in preparation for more 32/64 consolidation. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-04 16:14:39 +08:00
static inline unsigned long long neff_sign_extend(unsigned long val)
{
unsigned long long extended = val;
return (extended & NEFF_SIGN) ? (extended | NEFF_MASK) : extended;
}
sh: Split out 29-bit and 32-bit physical mode definitions. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-10 18:16:55 +08:00
#ifdef CONFIG_29BIT
#define NPHYS 29
#else
#define NPHYS 32
#endif
#define NPHYS_SIGN (1LL << (NPHYS - 1))
#define NPHYS_MASK (-1LL << NPHYS)
sh: Revert TLB miss fast-path changes that broke PTEA parts. This ended up causing problems for older parts (particularly ones using PTEA). Revert this for now, it can be added back in once it's had some more testing. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-02-14 13:13:10 +08:00
#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#define PGDIR_MASK (~(PGDIR_SIZE-1))
sh: Preliminary support for SH-X2 MMU. This adds some preliminary support for the SH-X2 MMU, used by newer SH-4A parts (particularly SH7785). This MMU implements a 'compat' mode with SH-X MMUs and an 'extended' mode for SH-X2 extended features. Extended features include additional page sizes (8kB, 4MB, 64MB), as well as the addition of page execute permissions. The extended mode attributes are placed in a second data array, which requires us to switch to 64-bit PTEs when in X2 mode. With the addition of the exec perms, we also overhaul the mmap prots somewhat, now that it's possible to handle them more intelligently. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-20 13:30:26 +08:00
/* Entries per level */
sh: More tidying for large base pages. There were a few more things that needed fixing up, namely THREAD_SIZE and the TLB miss handler where certain PTRS_PER_PGD == PTRS_PER_PTE assumptions were being made. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-26 14:29:19 +08:00
#define PTRS_PER_PTE (PAGE_SIZE / (1 << PTE_MAGNITUDE))
sh: Preliminary support for SH-X2 MMU. This adds some preliminary support for the SH-X2 MMU, used by newer SH-4A parts (particularly SH7785). This MMU implements a 'compat' mode with SH-X MMUs and an 'extended' mode for SH-X2 extended features. Extended features include additional page sizes (8kB, 4MB, 64MB), as well as the addition of page execute permissions. The extended mode attributes are placed in a second data array, which requires us to switch to 64-bit PTEs when in X2 mode. With the addition of the exec perms, we also overhaul the mmap prots somewhat, now that it's possible to handle them more intelligently. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-20 13:30:26 +08:00
mm: make FIRST_USER_ADDRESS unsigned long on all archs LKP has triggered a compiler warning after my recent patch "mm: account pmd page tables to the process": mm/mmap.c: In function 'exit_mmap': >> mm/mmap.c:2857:2: warning: right shift count >= width of type [enabled by default] The code: > 2857 WARN_ON(mm_nr_pmds(mm) > 2858 round_up(FIRST_USER_ADDRESS, PUD_SIZE) >> PUD_SHIFT); In this, on tile, we have FIRST_USER_ADDRESS defined as 0. round_up() has the same type -- int. PUD_SHIFT. I think the best way to fix it is to define FIRST_USER_ADDRESS as unsigned long. On every arch for consistency. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reported-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-12 07:26:41 +08:00
#define FIRST_USER_ADDRESS 0UL
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sh: Prepare for dynamic PMB support To allow the MMU to be switched between 29bit and 32bit mode at runtime some constants need to swapped for functions that return a runtime value. Signed-off-by: Matt Fleming <matt@console-pimps.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-10-07 05:22:25 +08:00
#define PHYS_ADDR_MASK29 0x1fffffff
#define PHYS_ADDR_MASK32 0xffffffff
static inline unsigned long phys_addr_mask(void)
{
/* Is the MMU in 29bit mode? */
if (__in_29bit_mode())
return PHYS_ADDR_MASK29;
return PHYS_ADDR_MASK32;
}
sh: Clean up places that make 29-bit physical assumptions. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-30 16:52:53 +08:00
sh: Prepare for dynamic PMB support To allow the MMU to be switched between 29bit and 32bit mode at runtime some constants need to swapped for functions that return a runtime value. Signed-off-by: Matt Fleming <matt@console-pimps.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-10-07 05:22:25 +08:00
#define PTE_PHYS_MASK (phys_addr_mask() & PAGE_MASK)
sh: ioremap_prot support. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-09-12 19:41:05 +08:00
#define PTE_FLAGS_MASK (~(PTE_PHYS_MASK) << PAGE_SHIFT)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sh: Fix up VMALLOC_START for SH-5. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-10 19:39:06 +08:00
#ifdef CONFIG_SUPERH32
sh: Reclaim beginning of P3 space for vmalloc area. The first 1MB of P3 space was reserved and used for page colouring, as we've reworked that to use fixmaps, we can reclaim the space and hand it back to VMALLOC_START. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-25 09:43:47 +08:00
#define VMALLOC_START (P3SEG)
sh: Fix up VMALLOC_START for SH-5. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-10 19:39:06 +08:00
#else
#define VMALLOC_START (0xf0000000)
#endif
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE)
sh: Split out pgtable.h in to _32 and _64 variants. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-19 17:26:19 +08:00
#if defined(CONFIG_SUPERH32)
#include <asm/pgtable_32.h>
sh: Preliminary support for SH-X2 MMU. This adds some preliminary support for the SH-X2 MMU, used by newer SH-4A parts (particularly SH7785). This MMU implements a 'compat' mode with SH-X MMUs and an 'extended' mode for SH-X2 extended features. Extended features include additional page sizes (8kB, 4MB, 64MB), as well as the addition of page execute permissions. The extended mode attributes are placed in a second data array, which requires us to switch to 64-bit PTEs when in X2 mode. With the addition of the exec perms, we also overhaul the mmap prots somewhat, now that it's possible to handle them more intelligently. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-20 13:30:26 +08:00
#else
sh: Split out pgtable.h in to _32 and _64 variants. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-19 17:26:19 +08:00
#include <asm/pgtable_64.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#endif
/*
sh: Preliminary support for SH-X2 MMU. This adds some preliminary support for the SH-X2 MMU, used by newer SH-4A parts (particularly SH7785). This MMU implements a 'compat' mode with SH-X MMUs and an 'extended' mode for SH-X2 extended features. Extended features include additional page sizes (8kB, 4MB, 64MB), as well as the addition of page execute permissions. The extended mode attributes are placed in a second data array, which requires us to switch to 64-bit PTEs when in X2 mode. With the addition of the exec perms, we also overhaul the mmap prots somewhat, now that it's possible to handle them more intelligently. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-20 13:30:26 +08:00
* SH-X and lower (legacy) SuperH parts (SH-3, SH-4, some SH-4A) can't do page
* protection for execute, and considers it the same as a read. Also, write
* permission implies read permission. This is the closest we can get..
*
* SH-X2 (SH7785) and later parts take this to the opposite end of the extreme,
* not only supporting separate execute, read, and write bits, but having
* completely separate permission bits for user and kernel space.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
sh: Preliminary support for SH-X2 MMU. This adds some preliminary support for the SH-X2 MMU, used by newer SH-4A parts (particularly SH7785). This MMU implements a 'compat' mode with SH-X MMUs and an 'extended' mode for SH-X2 extended features. Extended features include additional page sizes (8kB, 4MB, 64MB), as well as the addition of page execute permissions. The extended mode attributes are placed in a second data array, which requires us to switch to 64-bit PTEs when in X2 mode. With the addition of the exec perms, we also overhaul the mmap prots somewhat, now that it's possible to handle them more intelligently. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-20 13:30:26 +08:00
/*xwr*/
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#define __P000 PAGE_NONE
#define __P001 PAGE_READONLY
#define __P010 PAGE_COPY
#define __P011 PAGE_COPY
sh: Preliminary support for SH-X2 MMU. This adds some preliminary support for the SH-X2 MMU, used by newer SH-4A parts (particularly SH7785). This MMU implements a 'compat' mode with SH-X MMUs and an 'extended' mode for SH-X2 extended features. Extended features include additional page sizes (8kB, 4MB, 64MB), as well as the addition of page execute permissions. The extended mode attributes are placed in a second data array, which requires us to switch to 64-bit PTEs when in X2 mode. With the addition of the exec perms, we also overhaul the mmap prots somewhat, now that it's possible to handle them more intelligently. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-20 13:30:26 +08:00
#define __P100 PAGE_EXECREAD
#define __P101 PAGE_EXECREAD
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#define __P110 PAGE_COPY
#define __P111 PAGE_COPY
#define __S000 PAGE_NONE
#define __S001 PAGE_READONLY
sh: Preliminary support for SH-X2 MMU. This adds some preliminary support for the SH-X2 MMU, used by newer SH-4A parts (particularly SH7785). This MMU implements a 'compat' mode with SH-X MMUs and an 'extended' mode for SH-X2 extended features. Extended features include additional page sizes (8kB, 4MB, 64MB), as well as the addition of page execute permissions. The extended mode attributes are placed in a second data array, which requires us to switch to 64-bit PTEs when in X2 mode. With the addition of the exec perms, we also overhaul the mmap prots somewhat, now that it's possible to handle them more intelligently. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-20 13:30:26 +08:00
#define __S010 PAGE_WRITEONLY
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#define __S011 PAGE_SHARED
sh: Preliminary support for SH-X2 MMU. This adds some preliminary support for the SH-X2 MMU, used by newer SH-4A parts (particularly SH7785). This MMU implements a 'compat' mode with SH-X MMUs and an 'extended' mode for SH-X2 extended features. Extended features include additional page sizes (8kB, 4MB, 64MB), as well as the addition of page execute permissions. The extended mode attributes are placed in a second data array, which requires us to switch to 64-bit PTEs when in X2 mode. With the addition of the exec perms, we also overhaul the mmap prots somewhat, now that it's possible to handle them more intelligently. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-20 13:30:26 +08:00
#define __S100 PAGE_EXECREAD
#define __S101 PAGE_EXECREAD
#define __S110 PAGE_RWX
#define __S111 PAGE_RWX
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
typedef pte_t *pte_addr_t;
#define kern_addr_valid(addr) (1)
sh: Split out pgtable.h in to _32 and _64 variants. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-19 17:26:19 +08:00
#define pte_pfn(x) ((unsigned long)(((x).pte_low >> PAGE_SHIFT)))
[PATCH] fix remaining missing includes Fix more include file problems that surfaced since I submitted the previous fix-missing-includes.patch. This should now allow not to include sched.h from module.h, which is done by a followup patch. Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-07 16:59:43 +08:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
sh: Move page table allocation out of line We also switched away from quicklists and instead moved to slab caches. After benchmarking both implementations the difference is negligible. The slab caches suit us better though because the size of a pgd table is just 4 entries when we're using a 3-level page table layout and quicklists always deal with pages. Signed-off-by: Matt Fleming <matt@console-pimps.org>
2009-12-31 20:19:24 +08:00
* Initialise the page table caches
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
sh: Move page table allocation out of line We also switched away from quicklists and instead moved to slab caches. After benchmarking both implementations the difference is negligible. The slab caches suit us better though because the size of a pgd table is just 4 entries when we're using a 3-level page table layout and quicklists always deal with pages. Signed-off-by: Matt Fleming <matt@console-pimps.org>
2009-12-31 20:19:24 +08:00
extern void pgtable_cache_init(void);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sh: Split out pgtable.h in to _32 and _64 variants. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-19 17:26:19 +08:00
struct vm_area_struct;
sh: Fix up breakage from asm-generic/pgtable.h changes. We require a forward declaration for mm_struct: In file included from arch/sh/include/asm/pgtable.h:163, from arch/sh/include/asm/io.h:21, from arch/sh/kernel/machvec.c:20: include/asm-generic/pgtable.h:104: error: 'struct mm_struct' declared inside parameter list include/asm-generic/pgtable.h: In function 'ptep_get_and_clear_full': include/asm-generic/pgtable.h:107: error: passing argument 1 of 'ptep_get_and_clear' from incompatible pointer type include/asm-generic/pgtable.h:70: note: expected 'struct mm_struct *' but argument is of type 'struct mm_struct *' Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-01-14 14:46:50 +08:00
struct mm_struct;
sh: update_mmu_cache() consolidation. This splits out a separate __update_cache()/__update_tlb() for update_mmu_cache() to wrap in to. This lets us share the common __update_cache() bits while keeping special __update_tlb() handling broken out. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-07-28 23:12:17 +08:00
extern void __update_cache(struct vm_area_struct *vma,
unsigned long address, pte_t pte);
extern void __update_tlb(struct vm_area_struct *vma,
unsigned long address, pte_t pte);
static inline void
MM: Pass a PTE pointer to update_mmu_cache() rather than the PTE itself On VIVT ARM, when we have multiple shared mappings of the same file in the same MM, we need to ensure that we have coherency across all copies. We do this via make_coherent() by making the pages uncacheable. This used to work fine, until we allowed highmem with highpte - we now have a page table which is mapped as required, and is not available for modification via update_mmu_cache(). Ralf Beache suggested getting rid of the PTE value passed to update_mmu_cache(): On MIPS update_mmu_cache() calls __update_tlb() which walks pagetables to construct a pointer to the pte again. Passing a pte_t * is much more elegant. Maybe we might even replace the pte argument with the pte_t? Ben Herrenschmidt would also like the pte pointer for PowerPC: Passing the ptep in there is exactly what I want. I want that -instead- of the PTE value, because I have issue on some ppc cases, for I$/D$ coherency, where set_pte_at() may decide to mask out the _PAGE_EXEC. So, pass in the mapped page table pointer into update_mmu_cache(), and remove the PTE value, updating all implementations and call sites to suit. Includes a fix from Stephen Rothwell: sparc: fix fallout from update_mmu_cache API change Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-19 00:40:18 +08:00
update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t *ptep)
sh: update_mmu_cache() consolidation. This splits out a separate __update_cache()/__update_tlb() for update_mmu_cache() to wrap in to. This lets us share the common __update_cache() bits while keeping special __update_tlb() handling broken out. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-07-28 23:12:17 +08:00
{
MM: Pass a PTE pointer to update_mmu_cache() rather than the PTE itself On VIVT ARM, when we have multiple shared mappings of the same file in the same MM, we need to ensure that we have coherency across all copies. We do this via make_coherent() by making the pages uncacheable. This used to work fine, until we allowed highmem with highpte - we now have a page table which is mapped as required, and is not available for modification via update_mmu_cache(). Ralf Beache suggested getting rid of the PTE value passed to update_mmu_cache(): On MIPS update_mmu_cache() calls __update_tlb() which walks pagetables to construct a pointer to the pte again. Passing a pte_t * is much more elegant. Maybe we might even replace the pte argument with the pte_t? Ben Herrenschmidt would also like the pte pointer for PowerPC: Passing the ptep in there is exactly what I want. I want that -instead- of the PTE value, because I have issue on some ppc cases, for I$/D$ coherency, where set_pte_at() may decide to mask out the _PAGE_EXEC. So, pass in the mapped page table pointer into update_mmu_cache(), and remove the PTE value, updating all implementations and call sites to suit. Includes a fix from Stephen Rothwell: sparc: fix fallout from update_mmu_cache API change Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-19 00:40:18 +08:00
pte_t pte = *ptep;
sh: update_mmu_cache() consolidation. This splits out a separate __update_cache()/__update_tlb() for update_mmu_cache() to wrap in to. This lets us share the common __update_cache() bits while keeping special __update_tlb() handling broken out. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-07-28 23:12:17 +08:00
__update_cache(vma, address, pte);
__update_tlb(vma, address, pte);
}
sh: Preliminary support for SH-X2 MMU. This adds some preliminary support for the SH-X2 MMU, used by newer SH-4A parts (particularly SH7785). This MMU implements a 'compat' mode with SH-X MMUs and an 'extended' mode for SH-X2 extended features. Extended features include additional page sizes (8kB, 4MB, 64MB), as well as the addition of page execute permissions. The extended mode attributes are placed in a second data array, which requires us to switch to 64-bit PTEs when in X2 mode. With the addition of the exec perms, we also overhaul the mmap prots somewhat, now that it's possible to handle them more intelligently. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-20 13:30:26 +08:00
extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
extern void paging_init(void);
sh: Stub in page_table_range_init() on nommu. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-12-17 09:52:11 +08:00
extern void page_table_range_init(unsigned long start, unsigned long end,
pgd_t *pgd);
sh: Preliminary support for SH-X2 MMU. This adds some preliminary support for the SH-X2 MMU, used by newer SH-4A parts (particularly SH7785). This MMU implements a 'compat' mode with SH-X MMUs and an 'extended' mode for SH-X2 extended features. Extended features include additional page sizes (8kB, 4MB, 64MB), as well as the addition of page execute permissions. The extended mode attributes are placed in a second data array, which requires us to switch to 64-bit PTEs when in X2 mode. With the addition of the exec perms, we also overhaul the mmap prots somewhat, now that it's possible to handle them more intelligently. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-20 13:30:26 +08:00
sh: Handle shm_align_mask also for HAVE_ARCH_UNMAPPED_AREA_TOPDOWN. Presently shm_align_mask is only looked at for the bottom up case, but we still want this for proper colouring constraints in the topdown case. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-05-07 15:38:16 +08:00
/* arch/sh/mm/mmap.c */
#define HAVE_ARCH_UNMAPPED_AREA
#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#include <asm-generic/pgtable.h>
sh: Split out pgtable.h in to _32 and _64 variants. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-19 17:26:19 +08:00
#endif /* __ASM_SH_PGTABLE_H */