static void __init csky_memblock_init()

in kernel/setup.c [27:70]

• 32 lines of code
• 3 McCabe index (conditional complexity)

static void __init csky_memblock_init(void)
{
	unsigned long lowmem_size = PFN_DOWN(LOWMEM_LIMIT - PHYS_OFFSET_OFFSET);
	unsigned long sseg_size = PFN_DOWN(SSEG_SIZE - PHYS_OFFSET_OFFSET);
	unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0 };
	signed long size;

	memblock_reserve(__pa(_stext), _end - _stext);

	early_init_fdt_reserve_self();
	early_init_fdt_scan_reserved_mem();

	memblock_dump_all();

	min_low_pfn = PFN_UP(memblock_start_of_DRAM());
	max_low_pfn = max_pfn = PFN_DOWN(memblock_end_of_DRAM());

	size = max_pfn - min_low_pfn;

	if (size >= lowmem_size) {
		max_low_pfn = min_low_pfn + lowmem_size;
#ifdef CONFIG_PAGE_OFFSET_80000000
		write_mmu_msa1(read_mmu_msa0() + SSEG_SIZE);
#endif
	} else if (size > sseg_size) {
		max_low_pfn = min_low_pfn + sseg_size;
	}

	max_zone_pfn[ZONE_NORMAL] = max_low_pfn;

	mmu_init(min_low_pfn, max_low_pfn);

#ifdef CONFIG_HIGHMEM
	max_zone_pfn[ZONE_HIGHMEM] = max_pfn;

	highstart_pfn = max_low_pfn;
	highend_pfn   = max_pfn;
#endif
	memblock_set_current_limit(PFN_PHYS(max_low_pfn));

	dma_contiguous_reserve(0);

	free_area_init(max_zone_pfn);
}