diff options
Diffstat (limited to 'arch/ia64/xen/xencomm.c')
| -rw-r--r-- | arch/ia64/xen/xencomm.c | 106 | 
1 files changed, 0 insertions, 106 deletions
diff --git a/arch/ia64/xen/xencomm.c b/arch/ia64/xen/xencomm.c deleted file mode 100644 index 73d903ca2d6..00000000000 --- a/arch/ia64/xen/xencomm.c +++ /dev/null @@ -1,106 +0,0 @@ -/* - * Copyright (C) 2006 Hollis Blanchard <hollisb@us.ibm.com>, IBM Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA - */ - -#include <linux/mm.h> -#include <linux/err.h> - -static unsigned long kernel_virtual_offset; -static int is_xencomm_initialized; - -/* for xen early printk. It uses console io hypercall which uses xencomm. - * However early printk may use it before xencomm initialization. - */ -int -xencomm_is_initialized(void) -{ -	return is_xencomm_initialized; -} - -void -xencomm_initialize(void) -{ -	kernel_virtual_offset = KERNEL_START - ia64_tpa(KERNEL_START); -	is_xencomm_initialized = 1; -} - -/* Translate virtual address to physical address.  */ -unsigned long -xencomm_vtop(unsigned long vaddr) -{ -	struct page *page; -	struct vm_area_struct *vma; - -	if (vaddr == 0) -		return 0UL; - -	if (REGION_NUMBER(vaddr) == 5) { -		pgd_t *pgd; -		pud_t *pud; -		pmd_t *pmd; -		pte_t *ptep; - -		/* On ia64, TASK_SIZE refers to current.  It is not initialized -		   during boot. -		   Furthermore the kernel is relocatable and __pa() doesn't -		   work on  addresses.  */ -		if (vaddr >= KERNEL_START -		    && vaddr < (KERNEL_START + KERNEL_TR_PAGE_SIZE)) -			return vaddr - kernel_virtual_offset; - -		/* In kernel area -- virtually mapped.  */ -		pgd = pgd_offset_k(vaddr); -		if (pgd_none(*pgd) || pgd_bad(*pgd)) -			return ~0UL; - -		pud = pud_offset(pgd, vaddr); -		if (pud_none(*pud) || pud_bad(*pud)) -			return ~0UL; - -		pmd = pmd_offset(pud, vaddr); -		if (pmd_none(*pmd) || pmd_bad(*pmd)) -			return ~0UL; - -		ptep = pte_offset_kernel(pmd, vaddr); -		if (!ptep) -			return ~0UL; - -		return (pte_val(*ptep) & _PFN_MASK) | (vaddr & ~PAGE_MASK); -	} - -	if (vaddr > TASK_SIZE) { -		/* percpu variables */ -		if (REGION_NUMBER(vaddr) == 7 && -		    REGION_OFFSET(vaddr) >= (1ULL << IA64_MAX_PHYS_BITS)) -			ia64_tpa(vaddr); - -		/* kernel address */ -		return __pa(vaddr); -	} - -	/* XXX double-check (lack of) locking */ -	vma = find_extend_vma(current->mm, vaddr); -	if (!vma) -		return ~0UL; - -	/* We assume the page is modified.  */ -	page = follow_page(vma, vaddr, FOLL_WRITE | FOLL_TOUCH); -	if (IS_ERR_OR_NULL(page)) -		return ~0UL; - -	return (page_to_pfn(page) << PAGE_SHIFT) | (vaddr & ~PAGE_MASK); -}  | 
