int soc_change_memory_power(u64 start, u64 size, int change)
{
int i = 0;
int mask = default_mask;
u64 end = start + size;
int start_region = 0;
int end_region = 0;
if (change != STATE_ACTIVE && change != STATE_POWER_DOWN) {
pr_info("requested state transition invalid\n");
return 0;
}
for (i = 0; i < nr_mem_regions; i++) {
if (mem_regions[i].start <= start &&
mem_regions[i].start >=
mem_regions[start_region].start) {
start_region = i;
}
if (end <= mem_regions[i].start + mem_regions[i].size) {
end_region = i;
break;
}
}
for (i = start_region; i <= end_region; i++)
mask &= ~(0x1 << i);
if (!switch_memory_state(mask, change, start_region, end_region))
return size;
else
return 0;
}
/* The hotplug code expects the number of bytes that switched state successfully
* as the return value, so a return value of zero indicates an error
*/
int soc_change_memory_power(u64 start, u64 size, int change)
{
int i = 0;
int match = 0;
/* Find the memory region starting just below start */
for (i = 0; i < nr_mem_regions; i++) {
if (mem_regions[i].start <= start &&
mem_regions[i].start >= mem_regions[match].start) {
match = i;
}
}
if (start + size > mem_regions[match].start + mem_regions[match].size) {
pr_info("passed size exceeds size of memory bank\n");
return 0;
}
if (change != STATE_ACTIVE && change != STATE_POWER_DOWN) {
pr_info("requested state transition invalid\n");
return 0;
}
if (!switch_memory_state(match, change))
return size;
else
return 0;
}