mirror of
git://projects.qi-hardware.com/ben-blinkenlights.git
synced 2024-11-23 21:54:04 +02:00
libubb/physmem.c (physmem_xlat_vec): more general version of physmem_xlat
This commit is contained in:
parent
66080fe72e
commit
3161d5555b
@ -16,9 +16,17 @@
|
||||
#include <sys/types.h>
|
||||
|
||||
|
||||
struct physmem_vec {
|
||||
unsigned long addr;
|
||||
size_t len;
|
||||
};
|
||||
|
||||
|
||||
void *physmem_malloc(size_t size);
|
||||
void *physmem_calloc(size_t size);
|
||||
unsigned long physmem_xlat(void *v);
|
||||
int physmem_xlat_vec(void *v, size_t len,
|
||||
struct physmem_vec *vec, int vec_len);
|
||||
int physmem_flush(const void *data, size_t size);
|
||||
|
||||
#endif /* !UBB_PHYSMEM_H */
|
||||
|
@ -144,6 +144,41 @@ unsigned long physmem_xlat(void *v)
|
||||
}
|
||||
|
||||
|
||||
int physmem_xlat_vec(void *v, size_t len,
|
||||
struct physmem_vec *vec, int vec_len)
|
||||
{
|
||||
unsigned long vaddr = (unsigned long) v;
|
||||
unsigned long offset, this_len;
|
||||
int fd;
|
||||
int n = 0;
|
||||
|
||||
fd = open(PAGEMAP_FILE, O_RDONLY);
|
||||
if (fd < 0) {
|
||||
perror(PAGEMAP_FILE);
|
||||
exit(1);
|
||||
}
|
||||
while (len) {
|
||||
if (n >= vec_len) {
|
||||
close(fd);
|
||||
errno = EOVERFLOW;
|
||||
return -1;
|
||||
}
|
||||
offset = vaddr & (PAGE_SIZE-1);
|
||||
this_len = PAGE_SIZE-offset;
|
||||
if (this_len > len)
|
||||
this_len = len;
|
||||
vec->addr = xlat_one(fd, vaddr);
|
||||
vec->len = this_len;
|
||||
vec++;
|
||||
n++;
|
||||
vaddr += this_len;
|
||||
len -= this_len;
|
||||
}
|
||||
close(fd);
|
||||
return n;
|
||||
}
|
||||
|
||||
|
||||
int physmem_flush(const void *v, size_t size)
|
||||
{
|
||||
if (cacheflush((void *) v, size, DCACHE))
|
||||
|
Loading…
Reference in New Issue
Block a user