// Calculate the sum of an array of 4byte numbers
static int rifs_checksum(void *ptr, long len)
{
int *data = (int *)ptr;
long mdriver_count = 0;
int sum;
unsigned max;
// The checksum may take a while for large images, so we want to poll the mini-driver
max = (lsp.mdriver.size > 0) ? mdriver_cksum_max : len;
sum = 0;
while(len > 0)
{
sum += *data++;
len -= 4;
mdriver_count += 4;
if(mdriver_count >= max)
{
// Poll the mini-driver when we reach the limit
mdriver_check();
mdriver_count = 0;
}
}
return(sum);
}
void
copy_memory(paddr32_t dst, paddr32_t src, size_t len) {
uint8_t *d;
uint8_t *s;
unsigned max;
unsigned amount;
max = (lsp.mdriver.size > 0) ? mdriver_max : len;
for( ;; ) {
mdriver_check();
amount = (len > max) ? max : len;
// We make the assumption that the destination is going to
// be in the one-to-one mapping area.
d = MAKE_1TO1_PTR(dst);
s = startup_memory_map(amount, src, PROT_READ);
memmove(d, s, amount);
startup_memory_unmap(s);
len -= amount;
if(len == 0) break;
src += amount;
dst += amount;
}
}
void
(mdriver_init)(void) {
mdriver_ptr = SYSPAGE_ENTRY(mdriver);
mdriver_num = _syspage_ptr->mdriver.entry_size / sizeof(*mdriver_ptr);
mdriver_check();
}
