diff options
Diffstat (limited to 'linux-2.6.11-xen-sparse/arch/xen/i386/kernel/pci-dma.c')
| -rw-r--r-- | linux-2.6.11-xen-sparse/arch/xen/i386/kernel/pci-dma.c | 47 |
1 files changed, 0 insertions, 47 deletions
diff --git a/linux-2.6.11-xen-sparse/arch/xen/i386/kernel/pci-dma.c b/linux-2.6.11-xen-sparse/arch/xen/i386/kernel/pci-dma.c index 0716f0c62b..dc51c7972a 100644 --- a/linux-2.6.11-xen-sparse/arch/xen/i386/kernel/pci-dma.c +++ b/linux-2.6.11-xen-sparse/arch/xen/i386/kernel/pci-dma.c @@ -24,53 +24,6 @@ struct dma_coherent_mem { unsigned long *bitmap; }; -static void -xen_contig_memory(unsigned long vstart, unsigned int order) -{ - /* - * Ensure multi-page extents are contiguous in machine memory. - * This code could be cleaned up some, and the number of - * hypercalls reduced. - */ - pgd_t *pgd; - pud_t *pud; - pmd_t *pmd; - pte_t *pte; - unsigned long pfn, i, flags; - - scrub_pages(vstart, 1 << order); - - balloon_lock(flags); - - /* 1. Zap current PTEs, giving away the underlying pages. */ - for (i = 0; i < (1<<order); i++) { - pgd = pgd_offset_k(vstart + (i*PAGE_SIZE)); - pud = pud_offset(pgd, vstart + (i*PAGE_SIZE)); - pmd = pmd_offset(pud, vstart + (i*PAGE_SIZE)); - pte = pte_offset_kernel(pmd, vstart + (i*PAGE_SIZE)); - pfn = pte_val_ma(*pte) >> PAGE_SHIFT; - HYPERVISOR_update_va_mapping(vstart + (i*PAGE_SIZE), - __pte_ma(0), 0); - phys_to_machine_mapping[(__pa(vstart)>>PAGE_SHIFT)+i] = - INVALID_P2M_ENTRY; - if (HYPERVISOR_dom_mem_op(MEMOP_decrease_reservation, - &pfn, 1, 0) != 1) BUG(); - } - /* 2. Get a new contiguous memory extent. */ - if (HYPERVISOR_dom_mem_op(MEMOP_increase_reservation, - &pfn, 1, order) != 1) BUG(); - /* 3. Map the new extent in place of old pages. */ - for (i = 0; i < (1<<order); i++) { - HYPERVISOR_update_va_mapping(vstart + (i*PAGE_SIZE), - __pte_ma(((pfn+i)<<PAGE_SHIFT)|__PAGE_KERNEL), 0); - xen_machphys_update(pfn+i, (__pa(vstart)>>PAGE_SHIFT)+i); - phys_to_machine_mapping[(__pa(vstart)>>PAGE_SHIFT)+i] = pfn+i; - } - flush_tlb_all(); - - balloon_unlock(flags); -} - void *dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, int gfp) { |