microblaze_mmu_v2: pgalloc.h and page.h
Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Michal Simek
parent
dc95be1f71
commit
1f84e1ea0e
2 changed files with 314 additions and 43 deletions
|
|
@ -1,6 +1,8 @@
|
|||
/*
|
||||
* Copyright (C) 2008 Michal Simek
|
||||
* Copyright (C) 2008 PetaLogix
|
||||
* VM ops
|
||||
*
|
||||
* Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
|
||||
* Copyright (C) 2008-2009 PetaLogix
|
||||
* Copyright (C) 2006 Atmark Techno, Inc.
|
||||
* Changes for MMU support:
|
||||
* Copyright (C) 2007 Xilinx, Inc. All rights reserved.
|
||||
|
|
@ -15,14 +17,15 @@
|
|||
|
||||
#include <linux/pfn.h>
|
||||
#include <asm/setup.h>
|
||||
#include <linux/const.h>
|
||||
|
||||
#ifdef __KERNEL__
|
||||
|
||||
/* PAGE_SHIFT determines the page size */
|
||||
#define PAGE_SHIFT (12)
|
||||
#define PAGE_SIZE (1UL << PAGE_SHIFT)
|
||||
#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
|
||||
#define PAGE_MASK (~(PAGE_SIZE-1))
|
||||
|
||||
#ifdef __KERNEL__
|
||||
|
||||
#ifndef __ASSEMBLY__
|
||||
|
||||
#define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1)))
|
||||
|
|
@ -35,6 +38,7 @@
|
|||
/* align addr on a size boundary - adjust address up if needed */
|
||||
#define _ALIGN(addr, size) _ALIGN_UP(addr, size)
|
||||
|
||||
#ifndef CONFIG_MMU
|
||||
/*
|
||||
* PAGE_OFFSET -- the first address of the first page of memory. When not
|
||||
* using MMU this corresponds to the first free page in physical memory (aligned
|
||||
|
|
@ -43,15 +47,44 @@
|
|||
extern unsigned int __page_offset;
|
||||
#define PAGE_OFFSET __page_offset
|
||||
|
||||
#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
|
||||
#define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
|
||||
#define free_user_page(page, addr) free_page(addr)
|
||||
#else /* CONFIG_MMU */
|
||||
|
||||
#define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
|
||||
/*
|
||||
* PAGE_OFFSET -- the first address of the first page of memory. With MMU
|
||||
* it is set to the kernel start address (aligned on a page boundary).
|
||||
*
|
||||
* CONFIG_KERNEL_START is defined in arch/microblaze/config.in and used
|
||||
* in arch/microblaze/Makefile.
|
||||
*/
|
||||
#define PAGE_OFFSET CONFIG_KERNEL_START
|
||||
|
||||
/*
|
||||
* MAP_NR -- given an address, calculate the index of the page struct which
|
||||
* points to the address's page.
|
||||
*/
|
||||
#define MAP_NR(addr) (((unsigned long)(addr) - PAGE_OFFSET) >> PAGE_SHIFT)
|
||||
|
||||
#define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE)
|
||||
#define copy_user_page(vto, vfrom, vaddr, topg) \
|
||||
/*
|
||||
* The basic type of a PTE - 32 bit physical addressing.
|
||||
*/
|
||||
typedef unsigned long pte_basic_t;
|
||||
#define PTE_SHIFT (PAGE_SHIFT - 2) /* 1024 ptes per page */
|
||||
#define PTE_FMT "%.8lx"
|
||||
|
||||
#endif /* CONFIG_MMU */
|
||||
|
||||
# ifndef CONFIG_MMU
|
||||
# define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
|
||||
# define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
|
||||
# define free_user_page(page, addr) free_page(addr)
|
||||
# else /* CONFIG_MMU */
|
||||
extern void copy_page(void *to, void *from);
|
||||
# endif /* CONFIG_MMU */
|
||||
|
||||
# define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
|
||||
|
||||
# define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE)
|
||||
# define copy_user_page(vto, vfrom, vaddr, topg) \
|
||||
memcpy((vto), (vfrom), PAGE_SIZE)
|
||||
|
||||
/*
|
||||
|
|
@ -60,21 +93,32 @@ extern unsigned int __page_offset;
|
|||
typedef struct page *pgtable_t;
|
||||
typedef struct { unsigned long pte; } pte_t;
|
||||
typedef struct { unsigned long pgprot; } pgprot_t;
|
||||
/* FIXME this can depend on linux kernel version */
|
||||
# ifdef CONFIG_MMU
|
||||
typedef struct { unsigned long pmd; } pmd_t;
|
||||
typedef struct { unsigned long pgd; } pgd_t;
|
||||
# else /* CONFIG_MMU */
|
||||
typedef struct { unsigned long ste[64]; } pmd_t;
|
||||
typedef struct { pmd_t pue[1]; } pud_t;
|
||||
typedef struct { pud_t pge[1]; } pgd_t;
|
||||
# endif /* CONFIG_MMU */
|
||||
|
||||
# define pte_val(x) ((x).pte)
|
||||
# define pgprot_val(x) ((x).pgprot)
|
||||
|
||||
#define pte_val(x) ((x).pte)
|
||||
#define pgprot_val(x) ((x).pgprot)
|
||||
#define pmd_val(x) ((x).ste[0])
|
||||
#define pud_val(x) ((x).pue[0])
|
||||
#define pgd_val(x) ((x).pge[0])
|
||||
# ifdef CONFIG_MMU
|
||||
# define pmd_val(x) ((x).pmd)
|
||||
# define pgd_val(x) ((x).pgd)
|
||||
# else /* CONFIG_MMU */
|
||||
# define pmd_val(x) ((x).ste[0])
|
||||
# define pud_val(x) ((x).pue[0])
|
||||
# define pgd_val(x) ((x).pge[0])
|
||||
# endif /* CONFIG_MMU */
|
||||
|
||||
#define __pte(x) ((pte_t) { (x) })
|
||||
#define __pmd(x) ((pmd_t) { (x) })
|
||||
#define __pgd(x) ((pgd_t) { (x) })
|
||||
#define __pgprot(x) ((pgprot_t) { (x) })
|
||||
# define __pte(x) ((pte_t) { (x) })
|
||||
# define __pmd(x) ((pmd_t) { (x) })
|
||||
# define __pgd(x) ((pgd_t) { (x) })
|
||||
# define __pgprot(x) ((pgprot_t) { (x) })
|
||||
|
||||
/**
|
||||
* Conversions for virtual address, physical address, pfn, and struct
|
||||
|
|
@ -94,44 +138,80 @@ extern unsigned long max_low_pfn;
|
|||
extern unsigned long min_low_pfn;
|
||||
extern unsigned long max_pfn;
|
||||
|
||||
#define __pa(vaddr) ((unsigned long) (vaddr))
|
||||
#define __va(paddr) ((void *) (paddr))
|
||||
extern unsigned long memory_start;
|
||||
extern unsigned long memory_end;
|
||||
extern unsigned long memory_size;
|
||||
|
||||
#define phys_to_pfn(phys) (PFN_DOWN(phys))
|
||||
#define pfn_to_phys(pfn) (PFN_PHYS(pfn))
|
||||
extern int page_is_ram(unsigned long pfn);
|
||||
|
||||
#define virt_to_pfn(vaddr) (phys_to_pfn((__pa(vaddr))))
|
||||
#define pfn_to_virt(pfn) __va(pfn_to_phys((pfn)))
|
||||
# define phys_to_pfn(phys) (PFN_DOWN(phys))
|
||||
# define pfn_to_phys(pfn) (PFN_PHYS(pfn))
|
||||
|
||||
#define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
|
||||
#define page_to_virt(page) (pfn_to_virt(page_to_pfn(page)))
|
||||
# define virt_to_pfn(vaddr) (phys_to_pfn((__pa(vaddr))))
|
||||
# define pfn_to_virt(pfn) __va(pfn_to_phys((pfn)))
|
||||
|
||||
#define page_to_phys(page) (pfn_to_phys(page_to_pfn(page)))
|
||||
#define page_to_bus(page) (page_to_phys(page))
|
||||
#define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr)))
|
||||
# ifdef CONFIG_MMU
|
||||
# define virt_to_page(kaddr) (mem_map + MAP_NR(kaddr))
|
||||
# else /* CONFIG_MMU */
|
||||
# define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
|
||||
# define page_to_virt(page) (pfn_to_virt(page_to_pfn(page)))
|
||||
# define page_to_phys(page) (pfn_to_phys(page_to_pfn(page)))
|
||||
# define page_to_bus(page) (page_to_phys(page))
|
||||
# define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr)))
|
||||
# endif /* CONFIG_MMU */
|
||||
|
||||
extern unsigned int memory_start;
|
||||
extern unsigned int memory_end;
|
||||
extern unsigned int memory_size;
|
||||
# ifndef CONFIG_MMU
|
||||
# define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) <= max_mapnr)
|
||||
# define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
|
||||
# else /* CONFIG_MMU */
|
||||
# define ARCH_PFN_OFFSET (memory_start >> PAGE_SHIFT)
|
||||
# define pfn_valid(pfn) ((pfn) < (max_mapnr + ARCH_PFN_OFFSET))
|
||||
# define VALID_PAGE(page) ((page - mem_map) < max_mapnr)
|
||||
# endif /* CONFIG_MMU */
|
||||
|
||||
#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_mapnr)
|
||||
# endif /* __ASSEMBLY__ */
|
||||
|
||||
#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
|
||||
#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr)))
|
||||
|
||||
#else
|
||||
#define tophys(rd, rs) (addik rd, rs, 0)
|
||||
#define tovirt(rd, rs) (addik rd, rs, 0)
|
||||
#endif /* __ASSEMBLY__ */
|
||||
|
||||
#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr)))
|
||||
# ifndef CONFIG_MMU
|
||||
# define __pa(vaddr) ((unsigned long) (vaddr))
|
||||
# define __va(paddr) ((void *) (paddr))
|
||||
# else /* CONFIG_MMU */
|
||||
# define __pa(x) __virt_to_phys((unsigned long)(x))
|
||||
# define __va(x) ((void *)__phys_to_virt((unsigned long)(x)))
|
||||
# endif /* CONFIG_MMU */
|
||||
|
||||
/* Convert between virtual and physical address for MMU. */
|
||||
/* Handle MicroBlaze processor with virtual memory. */
|
||||
|
||||
/* Convert between virtual and physical address for MMU. */
|
||||
/* Handle MicroBlaze processor with virtual memory. */
|
||||
#ifndef CONFIG_MMU
|
||||
#define __virt_to_phys(addr) addr
|
||||
#define __phys_to_virt(addr) addr
|
||||
#define tophys(rd, rs) addik rd, rs, 0
|
||||
#define tovirt(rd, rs) addik rd, rs, 0
|
||||
#else
|
||||
#define __virt_to_phys(addr) \
|
||||
((addr) + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START)
|
||||
#define __phys_to_virt(addr) \
|
||||
((addr) + CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR)
|
||||
#define tophys(rd, rs) \
|
||||
addik rd, rs, (CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START)
|
||||
#define tovirt(rd, rs) \
|
||||
addik rd, rs, (CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR)
|
||||
#endif /* CONFIG_MMU */
|
||||
|
||||
#define TOPHYS(addr) __virt_to_phys(addr)
|
||||
|
||||
#ifdef CONFIG_MMU
|
||||
#ifdef CONFIG_CONTIGUOUS_PAGE_ALLOC
|
||||
#define WANT_PAGE_VIRTUAL 1 /* page alloc 2 relies on this */
|
||||
#endif
|
||||
|
||||
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
|
||||
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
|
||||
#endif /* CONFIG_MMU */
|
||||
|
||||
#endif /* __KERNEL__ */
|
||||
|
||||
#include <asm-generic/memory_model.h>
|
||||
|
|
|
|||
|
|
@ -1,4 +1,6 @@
|
|||
/*
|
||||
* Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
|
||||
* Copyright (C) 2008-2009 PetaLogix
|
||||
* Copyright (C) 2006 Atmark Techno, Inc.
|
||||
*
|
||||
* This file is subject to the terms and conditions of the GNU General Public
|
||||
|
|
@ -9,6 +11,195 @@
|
|||
#ifndef _ASM_MICROBLAZE_PGALLOC_H
|
||||
#define _ASM_MICROBLAZE_PGALLOC_H
|
||||
|
||||
#ifdef CONFIG_MMU
|
||||
|
||||
#include <linux/kernel.h> /* For min/max macros */
|
||||
#include <linux/highmem.h>
|
||||
#include <asm/setup.h>
|
||||
#include <asm/io.h>
|
||||
#include <asm/page.h>
|
||||
#include <asm/cache.h>
|
||||
|
||||
#define PGDIR_ORDER 0
|
||||
|
||||
/*
|
||||
* This is handled very differently on MicroBlaze since out page tables
|
||||
* are all 0's and I want to be able to use these zero'd pages elsewhere
|
||||
* as well - it gives us quite a speedup.
|
||||
* -- Cort
|
||||
*/
|
||||
extern struct pgtable_cache_struct {
|
||||
unsigned long *pgd_cache;
|
||||
unsigned long *pte_cache;
|
||||
unsigned long pgtable_cache_sz;
|
||||
} quicklists;
|
||||
|
||||
#define pgd_quicklist (quicklists.pgd_cache)
|
||||
#define pmd_quicklist ((unsigned long *)0)
|
||||
#define pte_quicklist (quicklists.pte_cache)
|
||||
#define pgtable_cache_size (quicklists.pgtable_cache_sz)
|
||||
|
||||
extern unsigned long *zero_cache; /* head linked list of pre-zero'd pages */
|
||||
extern atomic_t zero_sz; /* # currently pre-zero'd pages */
|
||||
extern atomic_t zeropage_hits; /* # zero'd pages request that we've done */
|
||||
extern atomic_t zeropage_calls; /* # zero'd pages request that've been made */
|
||||
extern atomic_t zerototal; /* # pages zero'd over time */
|
||||
|
||||
#define zero_quicklist (zero_cache)
|
||||
#define zero_cache_sz (zero_sz)
|
||||
#define zero_cache_calls (zeropage_calls)
|
||||
#define zero_cache_hits (zeropage_hits)
|
||||
#define zero_cache_total (zerototal)
|
||||
|
||||
/*
|
||||
* return a pre-zero'd page from the list,
|
||||
* return NULL if none available -- Cort
|
||||
*/
|
||||
extern unsigned long get_zero_page_fast(void);
|
||||
|
||||
extern void __bad_pte(pmd_t *pmd);
|
||||
|
||||
extern inline pgd_t *get_pgd_slow(void)
|
||||
{
|
||||
pgd_t *ret;
|
||||
|
||||
ret = (pgd_t *)__get_free_pages(GFP_KERNEL, PGDIR_ORDER);
|
||||
if (ret != NULL)
|
||||
clear_page(ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
extern inline pgd_t *get_pgd_fast(void)
|
||||
{
|
||||
unsigned long *ret;
|
||||
|
||||
ret = pgd_quicklist;
|
||||
if (ret != NULL) {
|
||||
pgd_quicklist = (unsigned long *)(*ret);
|
||||
ret[0] = 0;
|
||||
pgtable_cache_size--;
|
||||
} else
|
||||
ret = (unsigned long *)get_pgd_slow();
|
||||
return (pgd_t *)ret;
|
||||
}
|
||||
|
||||
extern inline void free_pgd_fast(pgd_t *pgd)
|
||||
{
|
||||
*(unsigned long **)pgd = pgd_quicklist;
|
||||
pgd_quicklist = (unsigned long *) pgd;
|
||||
pgtable_cache_size++;
|
||||
}
|
||||
|
||||
extern inline void free_pgd_slow(pgd_t *pgd)
|
||||
{
|
||||
free_page((unsigned long)pgd);
|
||||
}
|
||||
|
||||
#define pgd_free(mm, pgd) free_pgd_fast(pgd)
|
||||
#define pgd_alloc(mm) get_pgd_fast()
|
||||
|
||||
#define pmd_pgtable(pmd) pmd_page(pmd)
|
||||
|
||||
/*
|
||||
* We don't have any real pmd's, and this code never triggers because
|
||||
* the pgd will always be present..
|
||||
*/
|
||||
#define pmd_alloc_one_fast(mm, address) ({ BUG(); ((pmd_t *)1); })
|
||||
#define pmd_alloc_one(mm, address) ({ BUG(); ((pmd_t *)2); })
|
||||
/* FIXME two definition - look below */
|
||||
#define pmd_free(mm, x) do { } while (0)
|
||||
#define pgd_populate(mm, pmd, pte) BUG()
|
||||
|
||||
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
|
||||
unsigned long address)
|
||||
{
|
||||
pte_t *pte;
|
||||
extern int mem_init_done;
|
||||
extern void *early_get_page(void);
|
||||
if (mem_init_done) {
|
||||
pte = (pte_t *)__get_free_page(GFP_KERNEL |
|
||||
__GFP_REPEAT | __GFP_ZERO);
|
||||
} else {
|
||||
pte = (pte_t *)early_get_page();
|
||||
if (pte)
|
||||
clear_page(pte);
|
||||
}
|
||||
return pte;
|
||||
}
|
||||
|
||||
static inline struct page *pte_alloc_one(struct mm_struct *mm,
|
||||
unsigned long address)
|
||||
{
|
||||
struct page *ptepage;
|
||||
|
||||
#ifdef CONFIG_HIGHPTE
|
||||
int flags = GFP_KERNEL | __GFP_HIGHMEM | __GFP_REPEAT;
|
||||
#else
|
||||
int flags = GFP_KERNEL | __GFP_REPEAT;
|
||||
#endif
|
||||
|
||||
ptepage = alloc_pages(flags, 0);
|
||||
if (ptepage)
|
||||
clear_highpage(ptepage);
|
||||
return ptepage;
|
||||
}
|
||||
|
||||
static inline pte_t *pte_alloc_one_fast(struct mm_struct *mm,
|
||||
unsigned long address)
|
||||
{
|
||||
unsigned long *ret;
|
||||
|
||||
ret = pte_quicklist;
|
||||
if (ret != NULL) {
|
||||
pte_quicklist = (unsigned long *)(*ret);
|
||||
ret[0] = 0;
|
||||
pgtable_cache_size--;
|
||||
}
|
||||
return (pte_t *)ret;
|
||||
}
|
||||
|
||||
extern inline void pte_free_fast(pte_t *pte)
|
||||
{
|
||||
*(unsigned long **)pte = pte_quicklist;
|
||||
pte_quicklist = (unsigned long *) pte;
|
||||
pgtable_cache_size++;
|
||||
}
|
||||
|
||||
extern inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
|
||||
{
|
||||
free_page((unsigned long)pte);
|
||||
}
|
||||
|
||||
extern inline void pte_free_slow(struct page *ptepage)
|
||||
{
|
||||
__free_page(ptepage);
|
||||
}
|
||||
|
||||
extern inline void pte_free(struct mm_struct *mm, struct page *ptepage)
|
||||
{
|
||||
__free_page(ptepage);
|
||||
}
|
||||
|
||||
#define __pte_free_tlb(tlb, pte) pte_free((tlb)->mm, (pte))
|
||||
|
||||
#define pmd_populate(mm, pmd, pte) (pmd_val(*(pmd)) = page_address(pte))
|
||||
|
||||
#define pmd_populate_kernel(mm, pmd, pte) \
|
||||
(pmd_val(*(pmd)) = (unsigned long) (pte))
|
||||
|
||||
/*
|
||||
* We don't have any real pmd's, and this code never triggers because
|
||||
* the pgd will always be present..
|
||||
*/
|
||||
#define pmd_alloc_one(mm, address) ({ BUG(); ((pmd_t *)2); })
|
||||
/*#define pmd_free(mm, x) do { } while (0)*/
|
||||
#define __pmd_free_tlb(tlb, x) do { } while (0)
|
||||
#define pgd_populate(mm, pmd, pte) BUG()
|
||||
|
||||
extern int do_check_pgt_cache(int, int);
|
||||
|
||||
#endif /* CONFIG_MMU */
|
||||
|
||||
#define check_pgt_cache() do {} while (0)
|
||||
|
||||
#endif /* _ASM_MICROBLAZE_PGALLOC_H */
|
||||
|
|
|
|||
Loading…
Reference in a new issue