static char *
use_hwinfo(struct chip_loc *chip) {
char *name;
hwi_tag *dev_tag;
hwi_tag *tag;
unsigned off;
unsigned loc;
struct asinfo_entry *as;
off = HWI_NULL_OFF;
for( ;; ) {
off = hwi_find_tag(off, 0, HWI_TAG_NAME_device);
if(off == HWI_NULL_OFF) return(NULL);
dev_tag = hwi_off2tag(off);
if(dev_tag->item.owner == HWI_NULL_OFF) continue;
tag = hwi_off2tag(dev_tag->item.owner);
if(strcmp(__hwi_find_string(tag->item.itemname), HWI_ITEM_DEVCLASS_RTC) == 0) break;
/* for the new hwinfo structure */
if(dev_tag->device.pnpid == hwi_devclass_RTC) break;
}
tag = hwi_off2tag(off);
name = __hwi_find_string(tag->item.itemname);
loc = hwi_find_tag(off, 1, HWI_TAG_NAME_location);
if(loc != HWI_NULL_OFF) {
tag = hwi_off2tag(loc);
chip->phys = tag->location.base;
chip->reg_shift = tag->location.regshift;
if(tag->location.addrspace == 0xffff) {
fprintf(stderr, "\nWrong address space for RTC.\n");
return NULL;
}
as = &SYSPAGE_ENTRY(asinfo)[tag->location.addrspace/sizeof(*as)];
chip->access_type = (strcmp(__hwi_find_string(as->name), "memory") == 0);
}
off = hwi_find_tag(off, 1, HWI_TAG_NAME_regname);
if(off != HWI_NULL_OFF) {
tag = hwi_off2tag(off);
chip->century_reg = tag->regname.offset;
}
return(name);
}
static int
match_name(struct asinfo_entry *base, struct asinfo_entry *as, const char *name) {
for( ;; ) {
if(strcmp(__hwi_find_string(as->name), name) == 0) return(1);
if(as->owner == AS_NULL_OFF) return(0);
as = ((struct asinfo_entry *)((uint8_t *)base + as->owner));
}
}
