* thinkpad 560x, for example, does not cooperate with the memory
* detection code.)
*/
-int __init copy_e820_map(struct e820entry * biosmap, int nr_map)
+int __init copy_e820_map(struct e820entry *biosmap, int nr_map)
{
/* Only one memory region (or negative)? Ignore it */
if (nr_map < 2)
return -1;
do {
- unsigned long long start = biosmap->addr;
- unsigned long long size = biosmap->size;
- unsigned long long end = start + size;
- unsigned long type = biosmap->type;
+ u64 start = biosmap->addr;
+ u64 size = biosmap->size;
+ u64 end = start + size;
+ u32 type = biosmap->type;
/* Overflow in 64 bits? Ignore the memory map. */
if (start > end)
return -1;
- /*
- * Some BIOSes claim RAM in the 640k - 1M region.
- * Not right. Fix it up.
- */
- if (type == E820_RAM) {
- if (start < 0x100000ULL && end > 0xA0000ULL) {
- if (start < 0xA0000ULL)
- add_memory_region(start, 0xA0000ULL-start, type);
- if (end <= 0x100000ULL)
- continue;
- start = 0x100000ULL;
- size = end - start;
- }
- }
add_memory_region(start, size, type);
- } while (biosmap++,--nr_map);
+ } while (biosmap++, --nr_map);
+
return 0;
}
/*
* Find the highest page frame number we have available
*/
-void __init find_max_pfn(void)
+void __init propagate_e820_map(void)
{
int i;
* size before original memory map is
* reset.
*/
- find_max_pfn();
+ propagate_e820_map();
saved_max_pfn = max_pfn;
#endif
e820.nr_map = 0;
return 0;
}
early_param("memmap", parse_memmap);
+void __init update_memory_range(u64 start, u64 size, unsigned old_type,
+ unsigned new_type)
+{
+ int i;
+
+ BUG_ON(old_type == new_type);
+
+ for (i = 0; i < e820.nr_map; i++) {
+ struct e820entry *ei = &e820.map[i];
+ u64 final_start, final_end;
+ if (ei->type != old_type)
+ continue;
+ /* totally covered? */
+ if (ei->addr >= start && ei->size <= size) {
+ ei->type = new_type;
+ continue;
+ }
+ /* partially covered */
+ final_start = max(start, ei->addr);
+ final_end = min(start + size, ei->addr + ei->size);
+ if (final_start >= final_end)
+ continue;
+ add_memory_region(final_start, final_end - final_start,
+ new_type);
+ }
+}
void __init update_e820(void)
{
u8 nr_map;