static int __init
x86_get_mtrr_mem_range(struct range *range, int nr_range,
unsigned long extra_remove_base,
unsigned long extra_remove_size)
{
unsigned long base, size;
mtrr_type type;
int i;
for (i = 0; i < num_var_ranges; i++) {
type = range_state[i].type;
if (type != MTRR_TYPE_WRBACK)
continue;
base = range_state[i].base_pfn;
size = range_state[i].size_pfn;
nr_range = add_range_with_merge(range, RANGE_NUM, nr_range,
base, base + size);
}
if (debug_print) {
printk(KERN_DEBUG "After WB checking\n");
for (i = 0; i < nr_range; i++)
printk(KERN_DEBUG "MTRR MAP PFN: %016llx - %016llx\n",
range[i].start, range[i].end);
}
/* Take out UC ranges: */
for (i = 0; i < num_var_ranges; i++) {
type = range_state[i].type;
if (type != MTRR_TYPE_UNCACHABLE &&
type != MTRR_TYPE_WRPROT)
continue;
size = range_state[i].size_pfn;
if (!size)
continue;
base = range_state[i].base_pfn;
if (base < (1<<(20-PAGE_SHIFT)) && mtrr_state.have_fixed &&
(mtrr_state.enabled & 1)) {
/* Var MTRR contains UC entry below 1M? Skip it: */
printk(BIOS_BUG_MSG, i);
if (base + size <= (1<<(20-PAGE_SHIFT)))
continue;
size -= (1<<(20-PAGE_SHIFT)) - base;
base = 1<<(20-PAGE_SHIFT);
}
subtract_range(range, RANGE_NUM, base, base + size);
}
if (extra_remove_size)
subtract_range(range, RANGE_NUM, extra_remove_base,
extra_remove_base + extra_remove_size);
if (debug_print) {
printk(KERN_DEBUG "After UC checking\n");
for (i = 0; i < RANGE_NUM; i++) {
if (!range[i].end)
continue;
printk(KERN_DEBUG "MTRR MAP PFN: %016llx - %016llx\n",
range[i].start, range[i].end);
}
}
/* sort the ranges */
nr_range = clean_sort_range(range, RANGE_NUM);
if (debug_print) {
printk(KERN_DEBUG "After sorting\n");
for (i = 0; i < nr_range; i++)
printk(KERN_DEBUG "MTRR MAP PFN: %016llx - %016llx\n",
range[i].start, range[i].end);
}
return nr_range;
}
static int __init
x86_get_mtrr_mem_range(struct res_range *range, int nr_range,
unsigned long extra_remove_base,
unsigned long extra_remove_size)
{
unsigned long i, base, size;
mtrr_type type;
for (i = 0; i < num_var_ranges; i++) {
type = range_state[i].type;
if (type != MTRR_TYPE_WRBACK)
continue;
base = range_state[i].base_pfn;
size = range_state[i].size_pfn;
nr_range = add_range_with_merge(range, nr_range, base,
base + size - 1);
}
if (debug_print) {
printk(KERN_DEBUG "After WB checking\n");
for (i = 0; i < nr_range; i++)
printk(KERN_DEBUG "MTRR MAP PFN: %016lx - %016lx\n",
range[i].start, range[i].end + 1);
}
/* take out UC ranges */
for (i = 0; i < num_var_ranges; i++) {
type = range_state[i].type;
if (type != MTRR_TYPE_UNCACHABLE &&
type != MTRR_TYPE_WRPROT)
continue;
size = range_state[i].size_pfn;
if (!size)
continue;
base = range_state[i].base_pfn;
subtract_range(range, base, base + size - 1);
}
if (extra_remove_size)
subtract_range(range, extra_remove_base,
extra_remove_base + extra_remove_size - 1);
/* get new range num */
nr_range = 0;
for (i = 0; i < RANGE_NUM; i++) {
if (!range[i].end)
continue;
nr_range++;
}
if (debug_print) {
printk(KERN_DEBUG "After UC checking\n");
for (i = 0; i < nr_range; i++)
printk(KERN_DEBUG "MTRR MAP PFN: %016lx - %016lx\n",
range[i].start, range[i].end + 1);
}
/* sort the ranges */
sort(range, nr_range, sizeof(struct res_range), cmp_range, NULL);
if (debug_print) {
printk(KERN_DEBUG "After sorting\n");
for (i = 0; i < nr_range; i++)
printk(KERN_DEBUG "MTRR MAP PFN: %016lx - %016lx\n",
range[i].start, range[i].end + 1);
}
/* clear those is not used */
for (i = nr_range; i < RANGE_NUM; i++)
memset(&range[i], 0, sizeof(range[i]));
return nr_range;
}
/* WB를 *range 배열에 merge하면서 정리해 넣고
* UC와 WP는 이 range 영역에서 빼고 정렬한다.
*/
static int __init
x86_get_mtrr_mem_range(struct range *range, int nr_range,
unsigned long extra_remove_base,
unsigned long extra_remove_size)
{
unsigned long base, size;
mtrr_type type;
int i;
/* WB영역중 중첩되는 range를 합친다. */
for (i = 0; i < num_var_ranges; i++) {
type = range_state[i].type;
if (type != MTRR_TYPE_WRBACK)
continue; /* WB가 아니면 패스 */
base = range_state[i].base_pfn;
size = range_state[i].size_pfn;
/* WB영역중에서 중첩되는 부분을 합쳐서 range 배열에 넣는다. */
nr_range = add_range_with_merge(range, RANGE_NUM, nr_range,
base, base + size);
}
if (debug_print) {
printk(KERN_DEBUG "After WB checking\n");
for (i = 0; i < nr_range; i++)
printk(KERN_DEBUG "MTRR MAP PFN: %016llx - %016llx\n",
range[i].start, range[i].end);
}
/* Take out UC ranges: */
for (i = 0; i < num_var_ranges; i++) {
type = range_state[i].type;
/* UC나 WP가 아니면 패스 */
if (type != MTRR_TYPE_UNCACHABLE &&
type != MTRR_TYPE_WRPROT)
continue;
size = range_state[i].size_pfn;
if (!size)
continue;
base = range_state[i].base_pfn;
/* base는 4KB 단위다. 256 이하, 즉 1M 이하이면서
* fixed(1M) mtrr가 있으면서 enable인 예외상황을 가리킨다.
* 즉 fixed mtrr과 variable mtrr이 중첩되서 생기는 버그 경고이다.
*/
if (base < (1<<(20-PAGE_SHIFT)) && mtrr_state.have_fixed &&
(mtrr_state.enabled & 1)) {
/* Var MTRR contains UC entry below 1M? Skip it: */
printk(BIOS_BUG_MSG, i);
if (base + size <= (1<<(20-PAGE_SHIFT)))
continue;
size -= (1<<(20-PAGE_SHIFT)) - base;
base = 1<<(20-PAGE_SHIFT);
}
/* WB가 모인 range에서 UC, WP영역과 겹치는 부분을 뺀다. */
subtract_range(range, RANGE_NUM, base, base + size);
}
if (extra_remove_size) /* 인자로 들어온 4G 넘는 영역을 빼준다. */
subtract_range(range, RANGE_NUM, extra_remove_base,
extra_remove_base + extra_remove_size);
if (debug_print) {
printk(KERN_DEBUG "After UC checking\n");
for (i = 0; i < RANGE_NUM; i++) {
if (!range[i].end)
continue;
printk(KERN_DEBUG "MTRR MAP PFN: %016llx - %016llx\n",
range[i].start, range[i].end);
}
}
/* sort the ranges */
nr_range = clean_sort_range(range, RANGE_NUM); /* 정렬 */
if (debug_print) {
printk(KERN_DEBUG "After sorting\n");
for (i = 0; i < nr_range; i++)
printk(KERN_DEBUG "MTRR MAP PFN: %016llx - %016llx\n",
range[i].start, range[i].end);
}
return nr_range;
}
static int __init
x86_get_mtrr_mem_range(struct res_range *range, int nr_range,
unsigned long extra_remove_base,
unsigned long extra_remove_size)
{
unsigned long base, size;
mtrr_type type;
int i;
for (i = 0; i < num_var_ranges; i++) {
type = range_state[i].type;
if (type != MTRR_TYPE_WRBACK)
continue;
base = range_state[i].base_pfn;
size = range_state[i].size_pfn;
nr_range = add_range_with_merge(range, nr_range, base,
base + size - 1);
}
if (debug_print) {
printk(KERN_DEBUG "After WB checking\n");
for (i = 0; i < nr_range; i++)
printk(KERN_DEBUG "MTRR MAP PFN: %016lx - %016lx\n",
range[i].start, range[i].end + 1);
}
for (i = 0; i < num_var_ranges; i++) {
type = range_state[i].type;
if (type != MTRR_TYPE_UNCACHABLE &&
type != MTRR_TYPE_WRPROT)
continue;
size = range_state[i].size_pfn;
if (!size)
continue;
base = range_state[i].base_pfn;
if (base < (1<<(20-PAGE_SHIFT)) && mtrr_state.have_fixed &&
(mtrr_state.enabled & 1)) {
printk(BIOS_BUG_MSG, i);
if (base + size <= (1<<(20-PAGE_SHIFT)))
continue;
size -= (1<<(20-PAGE_SHIFT)) - base;
base = 1<<(20-PAGE_SHIFT);
}
subtract_range(range, base, base + size - 1);
}
if (extra_remove_size)
subtract_range(range, extra_remove_base,
extra_remove_base + extra_remove_size - 1);
nr_range = 0;
for (i = 0; i < RANGE_NUM; i++) {
if (!range[i].end)
continue;
nr_range++;
}
if (debug_print) {
printk(KERN_DEBUG "After UC checking\n");
for (i = 0; i < nr_range; i++)
printk(KERN_DEBUG "MTRR MAP PFN: %016lx - %016lx\n",
range[i].start, range[i].end + 1);
}
sort(range, nr_range, sizeof(struct res_range), cmp_range, NULL);
if (debug_print) {
printk(KERN_DEBUG "After sorting\n");
for (i = 0; i < nr_range; i++)
printk(KERN_DEBUG "MTRR MAP PFN: %016lx - %016lx\n",
range[i].start, range[i].end + 1);
}
for (i = nr_range; i < RANGE_NUM; i++)
memset(&range[i], 0, sizeof(range[i]));
return nr_range;
}
