struct request * rq_create(struct sourcelist *sl,char *spec,int64_t version,
int64_t offset,int64_t length,
req_fn done,void *priv) {
struct request *rq;
log_info(("creating request spec='%s' offset=%"PRId64"+%"PRId64,
spec,offset,length));
rq = safe_malloc(sizeof(struct request));
ref_create(&(rq->r));
ref_on_release(&(rq->r),rq_ref_release,rq);
ref_on_free(&(rq->r),rq_ref_free,rq);
rq->sl = sl;
rq->spec = strdup(spec);
rq->version = version;
rq->out = 0;
rq->chunks = 0;
rq->failed_errno = 0;
rq->offset = offset;
rq->length = length;
rq->done = done;
rq->priv = priv;
rq->start = microtime();
sl_acquire(sl);
ranges_init(&(rq->desired));
ranges_add(&(rq->desired),rq->offset,rq->offset+rq->length);
return rq;
}
void rq_found_data(struct request *rq,struct chunk *c) {
struct chunk *d;
struct ranges r;
struct rangei ri;
int64_t x,y;
while(c) {
log_debug(("processing report of data at %"PRId64"+%"PRId64,
c->offset,c->length));
/* Help satisfy request */
ranges_init(&r);
ranges_add(&r,c->offset,c->offset+c->length);
ranges_remove(&r,0,rq->offset);
ranges_remove(&r,rq->offset+rq->length,INT64_MAX);
ranges_start(&r,&ri);
while(ranges_next(&ri,&x,&y)) {
log_debug(("copying range %"PRId64"-%"PRId64,x,y));
memcpy(rq->out+x-rq->offset,c->out+x-c->offset,y-x);
}
ranges_free(&r);
ranges_remove(&(rq->desired),c->offset,c->offset+c->length);
/* Update desire given knoledge of eof */
if(c->eof) {
log_debug(("early eof: rest of file does not exist"));
ranges_remove(&(rq->desired),c->offset+c->length,INT64_MAX);
}
/* Move chunks to request (for later write) */
src_acquire(c->origin);
d = c->next;
c->next = rq->chunks;
rq->chunks = c;
c = d;
}
}
static void used_list_initialize(void)
{
static int initialized;
if (initialized)
return;
ranges_init(&used);
// Add regions depthcharge occupies.
ranges_add(&used, (uintptr_t)&_start, (uintptr_t)&_end);
// Remove trampoline area if it is non-zero in size.
if (&_tramp_start != &_tramp_end)
ranges_add(&used, (uintptr_t)&_tramp_start,
(uintptr_t)&_tramp_end);
initialized = 1;
}
int memory_wipe_unused(void)
{
Ranges ranges;
// Process the memory map from coreboot.
ranges_init(&ranges);
for (int i = 0; i < lib_sysinfo.n_memranges; i++) {
struct memrange *range = &lib_sysinfo.memrange[i];
uint64_t start = range->base;
uint64_t end = range->base + range->size;
switch (range->type) {
case CB_MEM_RAM:
ranges_add(&ranges, start, end);
break;
case CB_MEM_RESERVED:
case CB_MEM_ACPI:
case CB_MEM_NVS:
case CB_MEM_UNUSABLE:
case CB_MEM_VENDOR_RSVD:
case CB_MEM_TABLE:
ranges_sub(&ranges, start, end);
break;
default:
printf("Unrecognized memory type %d!\n",
range->type);
return 1;
}
}
// Exclude memory that's being used.
used_list_initialize();
ranges_for_each(&used, &remove_range, &ranges);
// Do the wipe.
printf("Wipe memory regions:\n");
ranges_for_each(&ranges, &unused_memset, NULL);
ranges_teardown(&ranges);
return 0;
}
void memory_mark_used(uint64_t start, uint64_t end)
{
used_list_initialize();
ranges_add(&used, start, end);
}