404

[ Avaa Bypassed ]




Upload:

Command:

botdev@3.144.37.229: ~ $
/*
 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
 *
 * 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.
 *
 * vineetg: June 2011
 *  -"/proc/meminfo | grep PageTables" kept on increasing
 *   Recently added pgtable dtor was not getting called.
 *
 * vineetg: May 2011
 *  -Variable pg-sz means that Page Tables could be variable sized themselves
 *    So calculate it based on addr traversal split [pgd-bits:pte-bits:xxx]
 *  -Page Table size capped to max 1 to save memory - hence verified.
 *  -Since these deal with constants, gcc compile-time optimizes them.
 *
 * vineetg: Nov 2010
 *  -Added pgtable ctor/dtor used for pgtable mem accounting
 *
 * vineetg: April 2010
 *  -Switched pgtable_t from being struct page * to unsigned long
 *      =Needed so that Page Table allocator (pte_alloc_one) is not forced to
 *       to deal with struct page. Thay way in future we can make it allocate
 *       multiple PG Tbls in one Page Frame
 *      =sweet side effect is avoiding calls to ugly page_address( ) from the
 *       pg-tlb allocator sub-sys (pte_alloc_one, ptr_free, pmd_populate
 *
 *  Amit Bhor, Sameer Dhavale: Codito Technologies 2004
 */

#ifndef _ASM_ARC_PGALLOC_H
#define _ASM_ARC_PGALLOC_H

#include <linux/mm.h>
#include <linux/log2.h>

static inline void
pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
{
	pmd_set(pmd, pte);
}

static inline void
pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t ptep)
{
	pmd_set(pmd, (pte_t *) ptep);
}

static inline int __get_order_pgd(void)
{
	return get_order(PTRS_PER_PGD * sizeof(pgd_t));
}

static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
	int num, num2;
	pgd_t *ret = (pgd_t *) __get_free_pages(GFP_KERNEL, __get_order_pgd());

	if (ret) {
		num = USER_PTRS_PER_PGD + USER_KERNEL_GUTTER / PGDIR_SIZE;
		memzero(ret, num * sizeof(pgd_t));

		num2 = VMALLOC_SIZE / PGDIR_SIZE;
		memcpy(ret + num, swapper_pg_dir + num, num2 * sizeof(pgd_t));

		memzero(ret + num + num2,
			       (PTRS_PER_PGD - num - num2) * sizeof(pgd_t));

	}
	return ret;
}

static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
	free_pages((unsigned long)pgd, __get_order_pgd());
}


/*
 * With software-only page-tables, addr-split for traversal is tweakable and
 * that directly governs how big tables would be at each level.
 * Further, the MMU page size is configurable.
 * Thus we need to programatically assert the size constraint
 * All of this is const math, allowing gcc to do constant folding/propagation.
 */

static inline int __get_order_pte(void)
{
	return get_order(PTRS_PER_PTE * sizeof(pte_t));
}

static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
					unsigned long address)
{
	pte_t *pte;

	pte = (pte_t *) __get_free_pages(GFP_KERNEL | __GFP_ZERO,
					 __get_order_pte());

	return pte;
}

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

	pte_pg = (pgtable_t)__get_free_pages(GFP_KERNEL, __get_order_pte());
	if (!pte_pg)
		return 0;
	memzero((void *)pte_pg, PTRS_PER_PTE * sizeof(pte_t));
	page = virt_to_page(pte_pg);
	if (!pgtable_page_ctor(page)) {
		__free_page(page);
		return 0;
	}

	return pte_pg;
}

static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
	free_pages((unsigned long)pte, __get_order_pte()); /* takes phy addr */
}

static inline void pte_free(struct mm_struct *mm, pgtable_t ptep)
{
	pgtable_page_dtor(virt_to_page(ptep));
	free_pages((unsigned long)ptep, __get_order_pte());
}

#define __pte_free_tlb(tlb, pte, addr)  pte_free((tlb)->mm, pte)

#define check_pgt_cache()   do { } while (0)
#define pmd_pgtable(pmd)	((pgtable_t) pmd_page_vaddr(pmd))

#endif /* _ASM_ARC_PGALLOC_H */

Filemanager

Name Type Size Permission Actions
Kbuild File 681 B 0644
arcregs.h File 8.59 KB 0644
asm-offsets.h File 311 B 0644
atomic.h File 15.14 KB 0644
barrier.h File 1.75 KB 0644
bitops.h File 9.81 KB 0644
bug.h File 938 B 0644
cache.h File 3.77 KB 0644
cacheflush.h File 3.88 KB 0644
checksum.h File 2.45 KB 0644
cmpxchg.h File 5.4 KB 0644
current.h File 695 B 0644
delay.h File 1.99 KB 0644
disasm.h File 3.87 KB 0644
dma-mapping.h File 734 B 0644
dma.h File 459 B 0644
dwarf.h File 892 B 0644
elf.h File 2.15 KB 0644
entry-arcv2.h File 4.85 KB 0644
entry-compact.h File 9.29 KB 0644
entry.h File 6.73 KB 0644
exec.h File 410 B 0644
fb.h File 411 B 0644
futex.h File 3.67 KB 0644
highmem.h File 1.46 KB 0644
hugepage.h File 2.41 KB 0644
io.h File 6.43 KB 0644
irq.h File 825 B 0644
irqflags-arcv2.h File 3.45 KB 0644
irqflags-compact.h File 4.25 KB 0644
irqflags.h File 509 B 0644
kdebug.h File 400 B 0644
kgdb.h File 1.35 KB 0644
kmap_types.h File 489 B 0644
kprobes.h File 1.37 KB 0644
linkage.h File 1.42 KB 0644
mach_desc.h File 2.06 KB 0644
mmu.h File 2.44 KB 0644
mmu_context.h File 5.67 KB 0644
mmzone.h File 989 B 0644
module.h File 661 B 0644
page.h File 2.99 KB 0644
pci.h File 705 B 0644
perf_event.h File 6.86 KB 0644
pgalloc.h File 3.79 KB 0644
pgtable.h File 14.2 KB 0644
processor.h File 4.69 KB 0644
ptrace.h File 3.87 KB 0644
sections.h File 407 B 0644
segment.h File 612 B 0644
serial.h File 644 B 0644
setup.h File 1.18 KB 0644
shmparam.h File 442 B 0644
smp.h File 4.25 KB 0644
spinlock.h File 8.79 KB 0644
spinlock_types.h File 1.03 KB 0644
stacktrace.h File 1.29 KB 0644
string.h File 1.15 KB 0644
switch_to.h File 1.17 KB 0644
syscall.h File 1.57 KB 0644
syscalls.h File 653 B 0644
thread_info.h File 3.39 KB 0644
timex.h File 508 B 0644
tlb-mmu1.h File 3.48 KB 0644
tlb.h File 1.23 KB 0644
tlbflush.h File 1.76 KB 0644
uaccess.h File 18.45 KB 0644
unaligned.h File 771 B 0644
unwind.h File 3.51 KB 0644