tjh.dev
+63
-7
arch/xtensa/mm/init.c
+63
-7
arch/xtensa/mm/init.c
···
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free_area_init_node(0, zones_size, ARCH_PFN_OFFSET, NULL);
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}
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#ifdef CONFIG_HIGHMEM
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static void __init free_area_high(unsigned long pfn, unsigned long end)
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{
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for (; pfn < end; pfn++)
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free_highmem_page(pfn_to_page(pfn));
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}
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static void __init free_highpages(void)
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{
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unsigned long max_low = max_low_pfn;
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struct memblock_region *mem, *res;
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reset_all_zones_managed_pages();
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/* set highmem page free */
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for_each_memblock(memory, mem) {
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unsigned long start = memblock_region_memory_base_pfn(mem);
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unsigned long end = memblock_region_memory_end_pfn(mem);
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/* Ignore complete lowmem entries */
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if (end <= max_low)
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continue;
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if (memblock_is_nomap(mem))
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continue;
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/* Truncate partial highmem entries */
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if (start < max_low)
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start = max_low;
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/* Find and exclude any reserved regions */
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for_each_memblock(reserved, res) {
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unsigned long res_start, res_end;
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res_start = memblock_region_reserved_base_pfn(res);
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res_end = memblock_region_reserved_end_pfn(res);
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if (res_end < start)
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continue;
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if (res_start < start)
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res_start = start;
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if (res_start > end)
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res_start = end;
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if (res_end > end)
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res_end = end;
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if (res_start != start)
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free_area_high(start, res_start);
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start = res_end;
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if (start == end)
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break;
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}
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/* And now free anything which remains */
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if (start < end)
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free_area_high(start, end);
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}
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}
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#else
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static void __init free_highpages(void)
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{
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}
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#endif
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/*
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* Initialize memory pages.
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*/
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void __init mem_init(void)
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{
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#ifdef CONFIG_HIGHMEM
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unsigned long tmp;
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reset_all_zones_managed_pages();
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for (tmp = max_low_pfn; tmp < max_pfn; tmp++)
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free_highmem_page(pfn_to_page(tmp));
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#endif
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free_highpages();
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max_mapnr = max_pfn - ARCH_PFN_OFFSET;
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high_memory = (void *)__va(max_low_pfn << PAGE_SHIFT);