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#include <xen/config.h>
#include <xen/lib.h>
#include <xen/domain_page.h>
#include <asm/mm.h>
#include <asm/guest_access.h>
unsigned long raw_copy_to_guest(void *to, const void *from, unsigned len)
{
/* XXX needs to handle faults */
unsigned offset = (vaddr_t)to & ~PAGE_MASK;
while ( len )
{
int rc;
paddr_t g;
void *p;
unsigned size = min(len, (unsigned)PAGE_SIZE - offset);
rc = gvirt_to_maddr((vaddr_t) to, &g);
if ( rc )
return rc;
p = map_domain_page(g>>PAGE_SHIFT);
p += offset;
memcpy(p, from, size);
unmap_domain_page(p - offset);
len -= size;
from += size;
to += size;
offset = 0;
}
return 0;
}
unsigned long raw_clear_guest(void *to, unsigned len)
{
/* XXX needs to handle faults */
unsigned offset = (vaddr_t)to & ~PAGE_MASK;
while ( len )
{
int rc;
paddr_t g;
void *p;
unsigned size = min(len, (unsigned)PAGE_SIZE - offset);
rc = gvirt_to_maddr((vaddr_t) to, &g);
if ( rc )
return rc;
p = map_domain_page(g>>PAGE_SHIFT);
p += offset;
memset(p, 0x00, size);
unmap_domain_page(p - offset);
len -= size;
to += size;
offset = 0;
}
return 0;
}
unsigned long raw_copy_from_guest(void *to, const void __user *from, unsigned len)
{
unsigned offset = (vaddr_t)from & ~PAGE_MASK;
while ( len )
{
int rc;
paddr_t g;
void *p;
unsigned size = min(len, (unsigned)(PAGE_SIZE - offset));
rc = gvirt_to_maddr((vaddr_t) from & PAGE_MASK, &g);
if ( rc )
return rc;
p = map_domain_page(g>>PAGE_SHIFT);
p += ((vaddr_t)from & (~PAGE_MASK));
memcpy(to, p, size);
unmap_domain_page(p);
len -= size;
from += size;
to += size;
}
return 0;
}
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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