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Diffstat (limited to 'arch/x86/mm/memblock.c')
-rw-r--r--arch/x86/mm/memblock.c348
1 files changed, 0 insertions, 348 deletions
diff --git a/arch/x86/mm/memblock.c b/arch/x86/mm/memblock.c
deleted file mode 100644
index 992da5ec5a64..000000000000
--- a/arch/x86/mm/memblock.c
+++ /dev/null
@@ -1,348 +0,0 @@
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/init.h>
-#include <linux/bitops.h>
-#include <linux/memblock.h>
-#include <linux/bootmem.h>
-#include <linux/mm.h>
-#include <linux/range.h>
-
-/* Check for already reserved areas */
-bool __init memblock_x86_check_reserved_size(u64 *addrp, u64 *sizep, u64 align)
-{
- struct memblock_region *r;
- u64 addr = *addrp, last;
- u64 size = *sizep;
- bool changed = false;
-
-again:
- last = addr + size;
- for_each_memblock(reserved, r) {
- if (last > r->base && addr < r->base) {
- size = r->base - addr;
- changed = true;
- goto again;
- }
- if (last > (r->base + r->size) && addr < (r->base + r->size)) {
- addr = round_up(r->base + r->size, align);
- size = last - addr;
- changed = true;
- goto again;
- }
- if (last <= (r->base + r->size) && addr >= r->base) {
- *sizep = 0;
- return false;
- }
- }
- if (changed) {
- *addrp = addr;
- *sizep = size;
- }
- return changed;
-}
-
-/*
- * Find next free range after start, and size is returned in *sizep
- */
-u64 __init memblock_x86_find_in_range_size(u64 start, u64 *sizep, u64 align)
-{
- struct memblock_region *r;
-
- for_each_memblock(memory, r) {
- u64 ei_start = r->base;
- u64 ei_last = ei_start + r->size;
- u64 addr;
-
- addr = round_up(ei_start, align);
- if (addr < start)
- addr = round_up(start, align);
- if (addr >= ei_last)
- continue;
- *sizep = ei_last - addr;
- while (memblock_x86_check_reserved_size(&addr, sizep, align))
- ;
-
- if (*sizep)
- return addr;
- }
-
- return MEMBLOCK_ERROR;
-}
-
-static __init struct range *find_range_array(int count)
-{
- u64 end, size, mem;
- struct range *range;
-
- size = sizeof(struct range) * count;
- end = memblock.current_limit;
-
- mem = memblock_find_in_range(0, end, size, sizeof(struct range));
- if (mem == MEMBLOCK_ERROR)
- panic("can not find more space for range array");
-
- /*
- * This range is tempoaray, so don't reserve it, it will not be
- * overlapped because We will not alloccate new buffer before
- * We discard this one
- */
- range = __va(mem);
- memset(range, 0, size);
-
- return range;
-}
-
-static void __init memblock_x86_subtract_reserved(struct range *range, int az)
-{
- u64 final_start, final_end;
- struct memblock_region *r;
-
- /* Take out region array itself at first*/
- memblock_free_reserved_regions();
-
- memblock_dbg("Subtract (%ld early reservations)\n", memblock.reserved.cnt);
-
- for_each_memblock(reserved, r) {
- memblock_dbg(" [%010llx-%010llx]\n", (u64)r->base, (u64)r->base + r->size - 1);
- final_start = PFN_DOWN(r->base);
- final_end = PFN_UP(r->base + r->size);
- if (final_start >= final_end)
- continue;
- subtract_range(range, az, final_start, final_end);
- }
-
- /* Put region array back ? */
- memblock_reserve_reserved_regions();
-}
-
-struct count_data {
- int nr;
-};
-
-static int __init count_work_fn(unsigned long start_pfn,
- unsigned long end_pfn, void *datax)
-{
- struct count_data *data = datax;
-
- data->nr++;
-
- return 0;
-}
-
-static int __init count_early_node_map(int nodeid)
-{
- struct count_data data;
-
- data.nr = 0;
- work_with_active_regions(nodeid, count_work_fn, &data);
-
- return data.nr;
-}
-
-int __init __get_free_all_memory_range(struct range **rangep, int nodeid,
- unsigned long start_pfn, unsigned long end_pfn)
-{
- int count;
- struct range *range;
- int nr_range;
-
- count = (memblock.reserved.cnt + count_early_node_map(nodeid)) * 2;
-
- range = find_range_array(count);
- nr_range = 0;
-
- /*
- * Use early_node_map[] and memblock.reserved.region to get range array
- * at first
- */
- nr_range = add_from_early_node_map(range, count, nr_range, nodeid);
- subtract_range(range, count, 0, start_pfn);
- subtract_range(range, count, end_pfn, -1ULL);
-
- memblock_x86_subtract_reserved(range, count);
- nr_range = clean_sort_range(range, count);
-
- *rangep = range;
- return nr_range;
-}
-
-int __init get_free_all_memory_range(struct range **rangep, int nodeid)
-{
- unsigned long end_pfn = -1UL;
-
-#ifdef CONFIG_X86_32
- end_pfn = max_low_pfn;
-#endif
- return __get_free_all_memory_range(rangep, nodeid, 0, end_pfn);
-}
-
-static u64 __init __memblock_x86_memory_in_range(u64 addr, u64 limit, bool get_free)
-{
- int i, count;
- struct range *range;
- int nr_range;
- u64 final_start, final_end;
- u64 free_size;
- struct memblock_region *r;
-
- count = (memblock.reserved.cnt + memblock.memory.cnt) * 2;
-
- range = find_range_array(count);
- nr_range = 0;
-
- addr = PFN_UP(addr);
- limit = PFN_DOWN(limit);
-
- for_each_memblock(memory, r) {
- final_start = PFN_UP(r->base);
- final_end = PFN_DOWN(r->base + r->size);
- if (final_start >= final_end)
- continue;
- if (final_start >= limit || final_end <= addr)
- continue;
-
- nr_range = add_range(range, count, nr_range, final_start, final_end);
- }
- subtract_range(range, count, 0, addr);
- subtract_range(range, count, limit, -1ULL);
-
- /* Subtract memblock.reserved.region in range ? */
- if (!get_free)
- goto sort_and_count_them;
- for_each_memblock(reserved, r) {
- final_start = PFN_DOWN(r->base);
- final_end = PFN_UP(r->base + r->size);
- if (final_start >= final_end)
- continue;
- if (final_start >= limit || final_end <= addr)
- continue;
-
- subtract_range(range, count, final_start, final_end);
- }
-
-sort_and_count_them:
- nr_range = clean_sort_range(range, count);
-
- free_size = 0;
- for (i = 0; i < nr_range; i++)
- free_size += range[i].end - range[i].start;
-
- return free_size << PAGE_SHIFT;
-}
-
-u64 __init memblock_x86_free_memory_in_range(u64 addr, u64 limit)
-{
- return __memblock_x86_memory_in_range(addr, limit, true);
-}
-
-u64 __init memblock_x86_memory_in_range(u64 addr, u64 limit)
-{
- return __memblock_x86_memory_in_range(addr, limit, false);
-}
-
-void __init memblock_x86_reserve_range(u64 start, u64 end, char *name)
-{
- if (start == end)
- return;
-
- if (WARN_ONCE(start > end, "memblock_x86_reserve_range: wrong range [%#llx, %#llx)\n", start, end))
- return;
-
- memblock_dbg(" memblock_x86_reserve_range: [%#010llx-%#010llx] %16s\n", start, end - 1, name);
-
- memblock_reserve(start, end - start);
-}
-
-void __init memblock_x86_free_range(u64 start, u64 end)
-{
- if (start == end)
- return;
-
- if (WARN_ONCE(start > end, "memblock_x86_free_range: wrong range [%#llx, %#llx)\n", start, end))
- return;
-
- memblock_dbg(" memblock_x86_free_range: [%#010llx-%#010llx]\n", start, end - 1);
-
- memblock_free(start, end - start);
-}
-
-/*
- * Need to call this function after memblock_x86_register_active_regions,
- * so early_node_map[] is filled already.
- */
-u64 __init memblock_x86_find_in_range_node(int nid, u64 start, u64 end, u64 size, u64 align)
-{
- u64 addr;
- addr = find_memory_core_early(nid, size, align, start, end);
- if (addr != MEMBLOCK_ERROR)
- return addr;
-
- /* Fallback, should already have start end within node range */
- return memblock_find_in_range(start, end, size, align);
-}
-
-/*
- * Finds an active region in the address range from start_pfn to last_pfn and
- * returns its range in ei_startpfn and ei_endpfn for the memblock entry.
- */
-static int __init memblock_x86_find_active_region(const struct memblock_region *ei,
- unsigned long start_pfn,
- unsigned long last_pfn,
- unsigned long *ei_startpfn,
- unsigned long *ei_endpfn)
-{
- u64 align = PAGE_SIZE;
-
- *ei_startpfn = round_up(ei->base, align) >> PAGE_SHIFT;
- *ei_endpfn = round_down(ei->base + ei->size, align) >> PAGE_SHIFT;
-
- /* Skip map entries smaller than a page */
- if (*ei_startpfn >= *ei_endpfn)
- return 0;
-
- /* Skip if map is outside the node */
- if (*ei_endpfn <= start_pfn || *ei_startpfn >= last_pfn)
- return 0;
-
- /* Check for overlaps */
- if (*ei_startpfn < start_pfn)
- *ei_startpfn = start_pfn;
- if (*ei_endpfn > last_pfn)
- *ei_endpfn = last_pfn;
-
- return 1;
-}
-
-/* Walk the memblock.memory map and register active regions within a node */
-void __init memblock_x86_register_active_regions(int nid, unsigned long start_pfn,
- unsigned long last_pfn)
-{
- unsigned long ei_startpfn;
- unsigned long ei_endpfn;
- struct memblock_region *r;
-
- for_each_memblock(memory, r)
- if (memblock_x86_find_active_region(r, start_pfn, last_pfn,
- &ei_startpfn, &ei_endpfn))
- add_active_range(nid, ei_startpfn, ei_endpfn);
-}
-
-/*
- * Find the hole size (in bytes) in the memory range.
- * @start: starting address of the memory range to scan
- * @end: ending address of the memory range to scan
- */
-u64 __init memblock_x86_hole_size(u64 start, u64 end)
-{
- unsigned long start_pfn = start >> PAGE_SHIFT;
- unsigned long last_pfn = end >> PAGE_SHIFT;
- unsigned long ei_startpfn, ei_endpfn, ram = 0;
- struct memblock_region *r;
-
- for_each_memblock(memory, r)
- if (memblock_x86_find_active_region(r, start_pfn, last_pfn,
- &ei_startpfn, &ei_endpfn))
- ram += ei_endpfn - ei_startpfn;
-
- return end - start - ((u64)ram << PAGE_SHIFT);
-}
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