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/*
 * linux/arch/unicore32/include/asm/pgalloc.h
 *
 * Code specific to PKUnity SoC and UniCore ISA
 *
 * Copyright (C) 2001-2010 GUAN Xue-tao
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef __UNICORE_PGALLOC_H__
#define __UNICORE_PGALLOC_H__

#include <asm/pgtable-hwdef.h>
#include <asm/processor.h>
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>

#define check_pgt_cache()		do { } while (0)

#define _PAGE_USER_TABLE	(PMD_TYPE_TABLE | PMD_PRESENT)
#define _PAGE_KERNEL_TABLE	(PMD_TYPE_TABLE | PMD_PRESENT)

extern pgd_t *get_pgd_slow(struct mm_struct *mm);
extern void free_pgd_slow(struct mm_struct *mm, pgd_t *pgd);

#define pgd_alloc(mm)			get_pgd_slow(mm)
#define pgd_free(mm, pgd)		free_pgd_slow(mm, pgd)

#define PGALLOC_GFP	(GFP_KERNEL | __GFP_ZERO)

/*
 * Allocate one PTE table.
 */
static inline pte_t *
pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr)
{
	pte_t *pte;

	pte = (pte_t *)__get_free_page(PGALLOC_GFP);
	if (pte)
		clean_dcache_area(pte, PTRS_PER_PTE * sizeof(pte_t));

	return pte;
}

static inline pgtable_t
pte_alloc_one(struct mm_struct *mm, unsigned long addr)
{
	struct page *pte;

	pte = alloc_pages(PGALLOC_GFP, 0);
	if (!pte)
		return NULL;
	if (!PageHighMem(pte)) {
		void *page = page_address(pte);
		clean_dcache_area(page, PTRS_PER_PTE * sizeof(pte_t));
	}
	if (!pgtable_page_ctor(pte)) {
		__free_page(pte);
	}

	return pte;
}

/*
 * Free one PTE table.
 */
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
	if (pte)
		free_page((unsigned long)pte);
}

static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
	pgtable_page_dtor(pte);
	__free_page(pte);
}

static inline void __pmd_populate(pmd_t *pmdp, unsigned long pmdval)
{
	set_pmd(pmdp, __pmd(pmdval));
	flush_pmd_entry(pmdp);
}

/*
 * Populate the pmdp entry with a pointer to the pte.  This pmd is part
 * of the mm address space.
 */
static inline void
pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
{
	unsigned long pte_ptr = (unsigned long)ptep;

	/*
	 * The pmd must be loaded with the physical
	 * address of the PTE table
	 */
	__pmd_populate(pmdp, __pa(pte_ptr) | _PAGE_KERNEL_TABLE);
}

static inline void
pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep)
{
	__pmd_populate(pmdp,
			page_to_pfn(ptep) << PAGE_SHIFT | _PAGE_USER_TABLE);
}
#define pmd_pgtable(pmd) pmd_page(pmd)

#endif

Filemanager

Name Type Size Permission Actions
Kbuild File 877 B 0644
assembler.h File 2.71 KB 0644
barrier.h File 602 B 0644
bitops.h File 1.19 KB 0644
bug.h File 632 B 0644
cache.h File 805 B 0644
cacheflush.h File 6.46 KB 0644
checksum.h File 978 B 0644
cmpxchg.h File 1.43 KB 0644
cpu-single.h File 1.18 KB 0644
cputype.h File 787 B 0644
delay.h File 1.53 KB 0644
dma-mapping.h File 1.11 KB 0644
dma.h File 531 B 0644
elf.h File 2.58 KB 0644
fpstate.h File 550 B 0644
fpu-ucf64.h File 1.32 KB 0644
gpio.h File 2.75 KB 0644
hwcap.h File 773 B 0644
hwdef-copro.h File 1.3 KB 0644
io.h File 2 KB 0644
irq.h File 2.56 KB 0644
irqflags.h File 1.03 KB 0644
linkage.h File 524 B 0644
memblock.h File 1.1 KB 0644
memory.h File 3.16 KB 0644
mmu.h File 430 B 0644
mmu_context.h File 2.76 KB 0644
page.h File 1.89 KB 0644
pci.h File 578 B 0644
pgalloc.h File 2.47 KB 0644
pgtable-hwdef.h File 1.3 KB 0644
pgtable.h File 9.42 KB 0644
processor.h File 1.98 KB 0644
ptrace.h File 1.37 KB 0644
stacktrace.h File 787 B 0644
string.h File 994 B 0644
suspend.h File 667 B 0644
switch_to.h File 901 B 0644
thread_info.h File 3.29 KB 0644
timex.h File 767 B 0644
tlb.h File 781 B 0644
tlbflush.h File 5.53 KB 0644
traps.h File 627 B 0644
uaccess.h File 1.33 KB 0644