/*  * Copyright (C) 2001 David J. Mckay (david.mckay@st.com) * * May be copied or modified under the terms of the GNU General Public * License.  See linux/COPYING for more information.                             * * Dynamic DMA mapping support. */#include <linux/types.h>#include <linux/mm.h>#include <linux/string.h>#include <linux/pci.h>#include <asm/io.h>#include <asm/addrspace.h>void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size,			   dma_addr_t * dma_handle){	void *ret;	int gfp = GFP_ATOMIC;	ret = (void *) __get_free_pages(gfp, get_order(size));	if (ret != NULL) {	        /* Is it neccessary to do the memset? */		memset(ret, 0, size);		*dma_handle = virt_to_bus(ret);	}	/* We must flush the cache before we pass it on to the device */	flush_cache_all();	return  P2SEGADDR(ret);}void pci_free_consistent(struct pci_dev *hwdev, size_t size,			 void *vaddr, dma_addr_t dma_handle){        unsigned long p1addr=P1SEGADDR((unsigned long)vaddr);	free_pages(p1addr, get_order(size));}