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/*
* Mach Operating System
* Copyright (c) 1991,1990,1989 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
#include <string.h>
#include <mach/boolean.h>
#include <mach/xen.h>
#include <kern/task.h>
#include <kern/thread.h>
#include <vm/vm_map.h>
#include "vm_param.h"
#include <mach/vm_prot.h>
#include <vm/vm_kern.h>
#include <vm/vm_page.h>
#include <i386/pmap.h>
#include <mach/machine/vm_param.h>
/*
* pmap_zero_page zeros the specified (machine independent) page.
*/
void
pmap_zero_page(p)
vm_offset_t p;
{
assert(p != vm_page_fictitious_addr);
memset((void *)phystokv(p), 0, PAGE_SIZE);
}
/*
* pmap_copy_page copies the specified (machine independent) pages.
*/
void
pmap_copy_page(src, dst)
vm_offset_t src, dst;
{
assert(src != vm_page_fictitious_addr);
assert(dst != vm_page_fictitious_addr);
memcpy((void *)phystokv(dst), (void *)phystokv(src), PAGE_SIZE);
}
/*
* copy_to_phys(src_addr_v, dst_addr_p, count)
*
* Copy virtual memory to physical memory
*/
void
copy_to_phys(src_addr_v, dst_addr_p, count)
vm_offset_t src_addr_v, dst_addr_p;
int count;
{
assert(dst_addr_p != vm_page_fictitious_addr);
memcpy((void *)phystokv(dst_addr_p), (void *)src_addr_v, count);
}
/*
* copy_from_phys(src_addr_p, dst_addr_v, count)
*
* Copy physical memory to virtual memory. The virtual memory
* is assumed to be present (e.g. the buffer pool).
*/
void
copy_from_phys(src_addr_p, dst_addr_v, count)
vm_offset_t src_addr_p, dst_addr_v;
int count;
{
assert(src_addr_p != vm_page_fictitious_addr);
memcpy((void *)dst_addr_v, (void *)phystokv(src_addr_p), count);
}
/*
* kvtophys(addr)
*
* Convert a kernel virtual address to a physical address
*/
vm_offset_t
kvtophys(addr)
vm_offset_t addr;
{
pt_entry_t *pte;
if ((pte = pmap_pte(kernel_pmap, addr)) == PT_ENTRY_NULL)
return 0;
return i386_trunc_page(
#ifdef MACH_PSEUDO_PHYS
ma_to_pa
#endif /* MACH_PSEUDO_PHYS */
(*pte)) | (addr & INTEL_OFFMASK);
}
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