本文整理汇总了C++中pgd_bad函数的典型用法代码示例。如果您正苦于以下问题:C++ pgd_bad函数的具体用法?C++ pgd_bad怎么用?C++ pgd_bad使用的例子?那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了pgd_bad函数的20个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于我们的系统推荐出更棒的C++代码示例。
示例1: m4u_v2p_new
int m4u_v2p_new(unsigned int va)
{
unsigned int pmdOffset = (va & (PMD_SIZE - 1));
unsigned int pageOffset = (va & (PAGE_SIZE - 1));
pgd_t *pgd;
pmd_t *pmd;
pte_t *pte;
unsigned int pa;
printk("Enter m4u_user_v2p()! 0x%x\n", va);
pgd = pgd_offset(current->mm, va); /* what is tsk->mm */
printk("m4u_user_v2p(), pgd 0x%x\n", pgd);
printk("pgd_none=%d, pgd_bad=%d\n", pgd_none(*pgd), pgd_bad(*pgd));
if(pgd_none(*pgd)||pgd_bad(*pgd))
{
printk("Error: m4u_user_v2p(), virtual addr 0x%x, pgd invalid! \n", va);
return 0;
}
pmd = pmd_offset(pgd, va);
printk("m4u_user_v2p(), pmd 0x%x\n", pmd);
printk("pmd_none=%d, pmd_bad=%d, pmd_val=0x%x\n", pmd_none(*pmd), pmd_bad(*pmd), pmd_val(*pmd));
/* If this is a page table entry, keep on walking to the next level */
if (( (unsigned int)pmd_val(*pmd) & PMD_TYPE_MASK) == PMD_TYPE_TABLE)
{
if(pmd_none(*pmd)||pmd_bad(*pmd))
{
printk("Error: m4u_user_v2p(), virtual addr 0x%x, pmd invalid! \n", va);
return 0;
}
pte = pte_offset_map(pmd, va);
printk("m4u_user_v2p(), pte 0x%x\n", pte);
if(pte_present(*pte))
{
pa=(pte_val(*pte) & (PAGE_MASK)) | pageOffset;
printk("PA = 0x%8x\n", pa);
return pa;
}
}
else /* Only 1 level page table */
{
if(pmd_none(*pmd))
{
printk("Error: m4u_user_v2p(), virtual addr 0x%x, pmd invalid! \n", va);
return 0;
}
pa=(pte_val(*pmd) & (PMD_MASK)) | pmdOffset;
printk("PA = 0x%8x\n", pa);
return pa;
}
return 0;
}
开发者ID:SelfImp,项目名称:m75,代码行数:58,代码来源:vdec.c
示例2: copy_pmd_range
static inline int copy_pmd_range(pgd_t *dst_pgd, pgd_t *src_pgd, unsigned long address, unsigned long size, int cow)
{
pmd_t * src_pmd, * dst_pmd;
unsigned long end;
int error = 0;
if (pgd_none(*src_pgd))
return 0;
if (pgd_bad(*src_pgd)) {
printk("copy_pmd_range: bad pgd (%08lx)\n", pgd_val(*src_pgd));
pgd_clear(src_pgd);
return 0;
}
src_pmd = pmd_offset(src_pgd, address);
if (pgd_none(*dst_pgd)) {
if (!pmd_alloc(dst_pgd, 0))
return -ENOMEM;
}
dst_pmd = pmd_offset(dst_pgd, address);
address &= ~PGDIR_MASK;
end = address + size;
if (end > PGDIR_SIZE)
end = PGDIR_SIZE;
do {
error = copy_pte_range(dst_pmd++, src_pmd++, address, end - address, cow);
if (error)
break;
address = (address + PMD_SIZE) & PMD_MASK;
} while (address < end);
return error;
}
开发者ID:shattered,项目名称:linux-m68k,代码行数:31,代码来源:memory.c
示例3: partial_clear
/*
* This function zeroes out partial mmap'ed pages at truncation time..
*/
static void partial_clear(struct vm_area_struct *vma, unsigned long address)
{
pgd_t *page_dir;
pmd_t *page_middle;
pte_t *page_table, pte;
page_dir = pgd_offset(vma->vm_mm, address);
if (pgd_none(*page_dir))
return;
if (pgd_bad(*page_dir)) {
printk("bad page table directory entry %p:[%lx]\n", page_dir, pgd_val(*page_dir));
pgd_clear(page_dir);
return;
}
page_middle = pmd_offset(page_dir, address);
if (pmd_none(*page_middle))
return;
if (pmd_bad(*page_middle)) {
printk("bad page table directory entry %p:[%lx]\n", page_dir, pgd_val(*page_dir));
pmd_clear(page_middle);
return;
}
page_table = pte_offset(page_middle, address);
pte = *page_table;
if (!pte_present(pte))
return;
flush_cache_page(vma, address);
address &= ~PAGE_MASK;
address += pte_page(pte);
if (address >= high_memory)
return;
memset((void *) address, 0, PAGE_SIZE - (address & ~PAGE_MASK));
flush_page_to_ram(pte_page(pte));
}
开发者ID:shattered,项目名称:linux-m68k,代码行数:37,代码来源:memory.c
示例4: shmedia_unmapioaddr
static void shmedia_unmapioaddr(unsigned long vaddr)
{
pgd_t *pgdp;
pud_t *pudp;
pmd_t *pmdp;
pte_t *ptep;
pgdp = pgd_offset_k(vaddr);
if (pgd_none(*pgdp) || pgd_bad(*pgdp))
return;
pudp = pud_offset(pgdp, vaddr);
if (pud_none(*pudp) || pud_bad(*pudp))
return;
pmdp = pmd_offset(pudp, vaddr);
if (pmd_none(*pmdp) || pmd_bad(*pmdp))
return;
ptep = pte_offset_kernel(pmdp, vaddr);
if (pte_none(*ptep) || !pte_present(*ptep))
return;
clear_page((void *)ptep);
pte_clear(&init_mm, vaddr, ptep);
}
开发者ID:mobilipia,项目名称:iods,代码行数:27,代码来源:ioremap_64.c
示例5: remove_mapping_pmd_range
static inline void
remove_mapping_pmd_range (pgd_t *pgd, unsigned long address, unsigned long size)
{
pmd_t *pmd;
unsigned long end;
if (pgd_none (*pgd))
return;
if (pgd_bad (*pgd)){
printk ("remove_graphics_pmd_range: bad pgd (%08lx)\n", pgd_val (*pgd));
pgd_clear (pgd);
return;
}
pmd = pmd_offset (pgd, address);
address &= ~PGDIR_MASK;
end = address + size;
if (end > PGDIR_SIZE)
end = PGDIR_SIZE;
do {
remove_mapping_pte_range (pmd, address, end - address);
address = (address + PMD_SIZE) & PMD_MASK;
pmd++;
} while (address < end);
}
开发者ID:dmgerman,项目名称:linux-pre-history,代码行数:26,代码来源:umap.c
示例6: unswap_pgd
static inline void unswap_pgd(struct vm_area_struct * vma, pgd_t *dir,
unsigned long address, unsigned long size,
unsigned long entry, unsigned long page
/* , int isswap */)
{
pmd_t * pmd;
unsigned long offset, end;
if (pgd_none(*dir))
return;
if (pgd_bad(*dir)) {
printk("unswap_pgd: bad pgd (%08lx)\n", pgd_val(*dir));
pgd_clear(dir);
return;
}
pmd = pmd_offset(dir, address);
offset = address & PGDIR_MASK;
address &= ~PGDIR_MASK;
end = address + size;
if (end > PGDIR_SIZE)
end = PGDIR_SIZE;
do {
unswap_pmd(vma, pmd, address, end - address, offset, entry,
page /* , isswap */);
address = (address + PMD_SIZE) & PMD_MASK;
pmd++;
} while (address < end);
}
开发者ID:chinnyannieb,项目名称:empeg-hijack,代码行数:28,代码来源:stram.c
示例7: unuse_pgd
static inline int unuse_pgd(struct vm_area_struct * vma, pgd_t *dir,
unsigned long address, unsigned long size,
unsigned int type, unsigned long page)
{
pmd_t * pmd;
unsigned long offset, end;
if (pgd_none(*dir))
return 0;
if (pgd_bad(*dir)) {
printk("unuse_pgd: bad pgd (%08lx)\n", pgd_val(*dir));
pgd_clear(dir);
return 0;
}
pmd = pmd_offset(dir, address);
offset = address & PGDIR_MASK;
address &= ~PGDIR_MASK;
end = address + size;
if (end > PGDIR_SIZE)
end = PGDIR_SIZE;
do {
if (unuse_pmd(vma, pmd, address, end - address, offset, type, page))
return 1;
address = (address + PMD_SIZE) & PMD_MASK;
pmd++;
} while (address < end);
return 0;
}
开发者ID:shattered,项目名称:linux-m68k,代码行数:28,代码来源:swapfile.c
示例8: my_follow_page
static struct page* my_follow_page(struct vm_area_struct *vma, unsigned long addr) {
pud_t *pud = NULL;
pmd_t *pmd = NULL;
pgd_t *pgd = NULL;
pte_t *pte = NULL;
spinlock_t *ptl = NULL;
struct page* page = NULL;
struct mm_struct *mm = current->mm;
pgd = pgd_offset(current->mm, addr);
if (pgd_none(*pgd) || unlikely(pgd_bad(*pgd))) {
goto out;
}
pud = pud_offset(pgd, addr);
if (pud_none(*pud) || unlikely(pud_bad(*pud))) {
goto out;
}
printk("aaaa\n");
pmd = pmd_offset(pud, addr);
if (pmd_none(*pmd) || unlikely(pmd_bad(*pmd))) {
goto out;
}
pte = pte_offset_map_lock(current->mm, pmd, addr, &ptl);
printk("bbbb\n");
if (!pte) goto out;
printk("cccc\n");
if (!pte_present(*pte)) goto unlock;
page = pfn_to_page(pte_pfn(*pte));
if (!page) goto unlock;
get_page(page);
unlock:
pte_unmap_unlock(pte, ptl);
out:
return page;
}
开发者ID:gowithqi,项目名称:linux_kernel_mm,代码行数:34,代码来源:zzq_vm.c
示例9: swap_out_pgd
static inline int swap_out_pgd(struct mm_struct * mm, struct vm_area_struct * vma, pgd_t *dir, unsigned long address, unsigned long end, int gfp_mask)
{
pmd_t * pmd;
unsigned long pgd_end;
if (pgd_none(*dir))
return 0;
if (pgd_bad(*dir)) {
pgd_ERROR(*dir);
pgd_clear(dir);
return 0;
}
pmd = pmd_offset(dir, address);
pgd_end = (address + PGDIR_SIZE) & PGDIR_MASK;
if (pgd_end && (end > pgd_end))
end = pgd_end;
do {
int result = swap_out_pmd(mm, vma, pmd, address, end, gfp_mask);
if (result)
return result;
if (!mm->swap_cnt)
return 0;
address = (address + PMD_SIZE) & PMD_MASK;
pmd++;
} while (address && (address < end));
return 0;
}
开发者ID:davidbau,项目名称:davej,代码行数:30,代码来源:vmscan.c
示例10: get_long
/*
* This routine gets a long from any process space by following the page
* tables. NOTE! You should check that the long isn't on a page boundary,
* and that it is in the task area before calling this: this routine does
* no checking.
*/
static unsigned long get_long(struct vm_area_struct * vma, unsigned long addr)
{
pgd_t * pgdir;
pte_t * pgtable;
unsigned long page;
repeat:
pgdir = PAGE_DIR_OFFSET(vma->vm_mm, addr);
if (pgd_none(*pgdir)) {
do_no_page(vma, addr, 0);
goto repeat;
}
if (pgd_bad(*pgdir)) {
printk("ptrace: bad page directory %08lx\n", pgd_val(*pgdir));
pgd_clear(pgdir);
return 0;
}
pgtable = (pte_t *) (PAGE_PTR(addr) + pgd_page(*pgdir));
if (!pte_present(*pgtable)) {
do_no_page(vma, addr, 0);
goto repeat;
}
page = pte_page(*pgtable);
/* this is a hack for non-kernel-mapped video buffers and similar */
if (page >= high_memory)
return 0;
page += addr & ~PAGE_MASK;
return *(unsigned long *) page;
}
开发者ID:andreiw,项目名称:mkunity,代码行数:35,代码来源:ptrace.c
示例11: filemap_sync_pmd_range
static inline int filemap_sync_pmd_range(pgd_t * pgd,
unsigned long address, unsigned long end,
struct vm_area_struct *vma, unsigned int flags)
{
pmd_t * pmd;
int error;
if (pgd_none(*pgd))
return 0;
if (pgd_bad(*pgd)) {
pgd_ERROR(*pgd);
pgd_clear(pgd);
return 0;
}
pmd = pmd_offset(pgd, address);
if ((address & PGDIR_MASK) != (end & PGDIR_MASK))
end = (address & PGDIR_MASK) + PGDIR_SIZE;
error = 0;
do {
error |= filemap_sync_pte_range(pmd, address, end, vma, flags);
address = (address + PMD_SIZE) & PMD_MASK;
pmd++;
} while (address && (address < end));
return error;
}
开发者ID:BackupTheBerlios,项目名称:tuxap,代码行数:25,代码来源:msync.c
示例12: show_pte
/*
* Dump out the page tables associated with 'addr' in mm 'mm'.
*/
void show_pte(struct mm_struct *mm, unsigned long addr)
{
pgd_t *pgd;
if (!mm)
mm = &init_mm;
pr_alert("pgd = %p\n", mm->pgd);
pgd = pgd_offset(mm, addr);
pr_alert("[%08lx] *pgd=%016llx", addr, pgd_val(*pgd));
do {
pud_t *pud;
pmd_t *pmd;
pte_t *pte;
if (pgd_none(*pgd) || pgd_bad(*pgd))
break;
pud = pud_offset(pgd, addr);
if (pud_none(*pud) || pud_bad(*pud))
break;
pmd = pmd_offset(pud, addr);
printk(", *pmd=%016llx", pmd_val(*pmd));
if (pmd_none(*pmd) || pmd_bad(*pmd))
break;
pte = pte_offset_map(pmd, addr);
printk(", *pte=%016llx", pte_val(*pte));
pte_unmap(pte);
} while(0);
printk("\n");
}
开发者ID:pranav01,项目名称:android_kernel_cyanogen_msm8916,代码行数:38,代码来源:fault.c
示例13: pin_page_for_write
static int
pin_page_for_write(const void __user *_addr, pte_t **ptep, spinlock_t **ptlp)
{
unsigned long addr = (unsigned long)_addr;
pgd_t *pgd;
pmd_t *pmd;
pte_t *pte;
pud_t *pud;
spinlock_t *ptl;
pgd = pgd_offset(current->mm, addr);
if (unlikely(pgd_none(*pgd) || pgd_bad(*pgd)))
return 0;
pud = pud_offset(pgd, addr);
if (unlikely(pud_none(*pud) || pud_bad(*pud)))
return 0;
pmd = pmd_offset(pud, addr);
if (unlikely(pmd_none(*pmd) || pmd_bad(*pmd)))
return 0;
pte = pte_offset_map_lock(current->mm, pmd, addr, &ptl);
if (unlikely(!pte_present(*pte) || !pte_young(*pte) ||
!pte_write(*pte) || !pte_dirty(*pte))) {
pte_unmap_unlock(pte, ptl);
return 0;
}
*ptep = pte;
*ptlp = ptl;
return 1;
}
开发者ID:klothius,项目名称:htc_pyramid_kernel_30,代码行数:34,代码来源:uaccess_with_memcpy.c
示例14: imm_get_physical
u32
imm_get_physical(void *v, u32 immid)
{
pmd_t *pmd;
pte_t *pte;
pgd_t *pgd;
u32 val = 0, virtual = (u32)v;
struct mm_struct* mm;
if (IMMID_USER(immid))
mm = current->mm;
else
mm = &init_mm;
pgd = pgd_offset(mm, virtual);
if (!pgd_none(*pgd) && !pgd_bad(*pgd)) {
/* 1st level entry pointer */
pmd = pmd_offset(pgd, virtual);
if (!pmd_none(*pmd) && !pmd_bad(*pmd)) {
/* 2nd level entry pointer */
pte = pte_offset_kernel(pmd, virtual);
if (pte) {
val = (*(u32 *)((u32)pte-2048))&PAGE_MASK;
val += virtual%PAGE_SIZE;
}
} else if (!pmd_none(*pmd)) {
开发者ID:12019,项目名称:kernel_zte_u880,代码行数:26,代码来源:policy.c
示例15: zap_pmd_range
static inline int zap_pmd_range(struct mm_struct *mm, pgd_t * dir, unsigned long address, unsigned long size)
{
pmd_t * pmd;
unsigned long end;
int freed;
if (pgd_none(*dir))
return 0;
if (pgd_bad(*dir)) {
pgd_ERROR(*dir);
pgd_clear(dir);
return 0;
}
pmd = pmd_offset(dir, address);
address &= ~PGDIR_MASK;
end = address + size;
if (end > PGDIR_SIZE)
end = PGDIR_SIZE;
freed = 0;
do {
freed += zap_pte_range(mm, pmd, address, end - address);
address = (address + PMD_SIZE) & PMD_MASK;
pmd++;
} while (address < end);
return freed;
}
开发者ID:davidbau,项目名称:davej,代码行数:26,代码来源:memory.c
示例16: iterate_pmd
static inline void iterate_pmd(pgd_t * dir, unsigned long address,
unsigned long size, pte_iterator_t op,
unsigned long arg)
{
pmd_t *pmd;
unsigned long end;
if (pgd_none(*dir))
return;
if (pgd_bad(*dir)) {
pgd_ERROR(*dir);
pgd_clear(dir);
return;
}
pmd = pmd_offset(dir, address);
address &= ~PGDIR_MASK;
end = address + size;
if (end > PGDIR_SIZE)
end = PGDIR_SIZE;
do {
iterate_pte(pmd, address, end - address, op, arg);
address = (address + PMD_SIZE) & PMD_MASK;
pmd++;
} while (address < end);
}
开发者ID:nhanh0,项目名称:hah,代码行数:25,代码来源:kmap.c
示例17: rtR0MemObjLinuxFixPte
/**
* Replace the PFN of a PTE with the address of the actual page.
*
* The caller maps a reserved dummy page at the address with the desired access
* and flags.
*
* This hack is required for older Linux kernels which don't provide
* remap_pfn_range().
*
* @returns 0 on success, -ENOMEM on failure.
* @param mm The memory context.
* @param ulAddr The mapping address.
* @param Phys The physical address of the page to map.
*/
static int rtR0MemObjLinuxFixPte(struct mm_struct *mm, unsigned long ulAddr, RTHCPHYS Phys)
{
int rc = -ENOMEM;
pgd_t *pgd;
spin_lock(&mm->page_table_lock);
pgd = pgd_offset(mm, ulAddr);
if (!pgd_none(*pgd) && !pgd_bad(*pgd))
{
pmd_t *pmd = pmd_offset(pgd, ulAddr);
if (!pmd_none(*pmd))
{
pte_t *ptep = pte_offset_map(pmd, ulAddr);
if (ptep)
{
pte_t pte = *ptep;
pte.pte_high &= 0xfff00000;
pte.pte_high |= ((Phys >> 32) & 0x000fffff);
pte.pte_low &= 0x00000fff;
pte.pte_low |= (Phys & 0xfffff000);
set_pte(ptep, pte);
pte_unmap(ptep);
rc = 0;
}
}
开发者ID:lskakaxi,项目名称:virtualbox-drv,代码行数:40,代码来源:memobj-r0drv-linux.c
示例18: follow_page
/*
* Do a quick page-table lookup for a single page.
*/
static struct page * follow_page(struct mm_struct *mm, unsigned long address, int write)
{
pgd_t *pgd;
pmd_t *pmd;
pte_t *ptep, pte;
pgd = pgd_offset(mm, address);
if (pgd_none(*pgd) || pgd_bad(*pgd))
goto out;
pmd = pmd_offset(pgd, address);
if (pmd_none(*pmd) || pmd_bad(*pmd))
goto out;
ptep = pte_offset(pmd, address);
if (!ptep)
goto out;
pte = *ptep;
if (pte_present(pte)) {
if (!write ||
(pte_write(pte) && pte_dirty(pte)))
return pte_page(pte);
}
out:
return 0;
}
开发者ID:fgeraci,项目名称:cs518-sched,代码行数:31,代码来源:memory.c
示例19: get_phys_addr
static unsigned long get_phys_addr(struct task_struct * p, unsigned long ptr)
{
pgd_t *page_dir;
pmd_t *page_middle;
pte_t pte;
if (!p || !p->mm || ptr >= TASK_SIZE)
return 0;
page_dir = pgd_offset(p->mm,ptr);
if (pgd_none(*page_dir))
return 0;
if (pgd_bad(*page_dir)) {
printk("bad page directory entry %08lx\n", pgd_val(*page_dir));
pgd_clear(page_dir);
return 0;
}
page_middle = pmd_offset(page_dir,ptr);
if (pmd_none(*page_middle))
return 0;
if (pmd_bad(*page_middle)) {
printk("bad page middle entry %08lx\n", pmd_val(*page_middle));
pmd_clear(page_middle);
return 0;
}
pte = *pte_offset(page_middle,ptr);
if (!pte_present(pte))
return 0;
return pte_page(pte) + (ptr & ~PAGE_MASK);
}
开发者ID:liexusong,项目名称:linux2.0-comment,代码行数:29,代码来源:array.c
示例20: pgd_offset
static inline pte_t *get_one_pte(struct mm_struct *mm, unsigned long addr)
{
pgd_t * pgd;
pmd_t * pmd;
pte_t * pte = NULL;
pgd = pgd_offset(mm, addr);
if (pgd_none(*pgd))
goto end;
if (pgd_bad(*pgd)) {
pgd_ERROR(*pgd);
pgd_clear(pgd);
goto end;
}
pmd = pmd_offset(pgd, addr);
if (pmd_none(*pmd))
goto end;
if (pmd_bad(*pmd)) {
pmd_ERROR(*pmd);
pmd_clear(pmd);
goto end;
}
pte = pte_offset(pmd, addr);
if (pte_none(*pte))
pte = NULL;
end:
return pte;
}
开发者ID:JBTech,项目名称:ralink_rt5350,代码行数:30,代码来源:mremap.c
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