blob: 4e163f83f881e4f3d6ecd4697cbfcf8425ebdac3 [file] [log] [blame]
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/string.h>
/*
* Dummy IO MMU functions
*/
extern unsigned long end_pfn;
void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size,
dma_addr_t *dma_handle)
{
void *ret;
int gfp = GFP_ATOMIC;
if (hwdev == NULL ||
end_pfn > (hwdev->dma_mask>>PAGE_SHIFT) || /* XXX */
(u32)hwdev->dma_mask < 0xffffffff)
gfp |= GFP_DMA;
ret = (void *)__get_free_pages(gfp, get_order(size));
if (ret != NULL) {
memset(ret, 0, size);
*dma_handle = virt_to_bus(ret);
}
return ret;
}
void pci_free_consistent(struct pci_dev *hwdev, size_t size,
void *vaddr, dma_addr_t dma_handle)
{
free_pages((unsigned long)vaddr, get_order(size));
}
static void __init check_ram(void)
{
if (end_pfn >= 0xffffffff>>PAGE_SHIFT) {
printk(KERN_ERR "WARNING more than 4GB of memory but no IOMMU.\n"
KERN_ERR "WARNING 32bit PCI may malfunction.\n");
/* Could play with highmem_start_page here to trick some subsystems
into bounce buffers. Unfortunately that would require setting
CONFIG_HIGHMEM too.
*/
}
}