int ehea_create_busmap( void )
{
u64 vaddr = EHEA_BUSMAP_START;
unsigned long high_section_index = 0;
int i;
/*
* Sections are not in ascending order -> Loop over all sections and
* find the highest PFN to compute the required map size.
*/
ehea_bmap.valid_sections = 0;
for (i = 0; i < NR_MEM_SECTIONS; i++)
if (valid_section_nr(i))
high_section_index = i;
ehea_bmap.entries = high_section_index + 1;
ehea_bmap.vaddr = vmalloc(ehea_bmap.entries * sizeof(*ehea_bmap.vaddr));
if (!ehea_bmap.vaddr)
return -ENOMEM;
for (i = 0 ; i < ehea_bmap.entries; i++) {
unsigned long pfn = section_nr_to_pfn(i);
if (pfn_valid(pfn)) {
ehea_bmap.vaddr[i] = vaddr;
vaddr += EHEA_SECTSIZE;
ehea_bmap.valid_sections++;
} else
ehea_bmap.vaddr[i] = 0;
}
return 0;
}
/*
* Allocate the accumulated non-linear sections, allocate a mem_map
* for each and record the physical to section mapping.
*/
void sparse_init(void)
{
unsigned long pnum;
struct page *map;
for (pnum = 0; pnum < NR_MEM_SECTIONS; pnum++) {
if (!valid_section_nr(pnum))
continue;
map = sparse_early_mem_map_alloc(pnum);
if (map)
sparse_init_one_section(&mem_section[pnum], pnum, map);
}
}
static ssize_t
store_mem_state(struct sys_device *dev, const char *buf, size_t count)
{
struct memory_block *mem;
unsigned int phys_section_nr;
int ret = -EINVAL;
mem = container_of(dev, struct memory_block, sysdev);
phys_section_nr = mem->phys_index;
if (!valid_section_nr(phys_section_nr))
goto out;
if (!strncmp(buf, "online", min((int)count, 6)))
ret = memory_block_change_state(mem, MEM_ONLINE, MEM_OFFLINE);
else if(!strncmp(buf, "offline", min((int)count, 7)))
ret = memory_block_change_state(mem, MEM_OFFLINE, MEM_ONLINE);
out:
if (ret)
return ret;
return count;
}
