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 73d903ca2d64..000000000000 --- 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); -} |