/* * paging_init() sets up the page tables - in fact we've already done this. */ void __init paging_init(void) { unsigned long total_ram = lmb_phys_mem_size(); unsigned long top_of_ram = lmb_end_of_DRAM(); unsigned long max_zone_pfns[MAX_NR_ZONES]; #ifdef CONFIG_HIGHMEM map_page(PKMAP_BASE, 0, 0); /* XXX gross */ pkmap_page_table = pte_offset_kernel(pmd_offset(pgd_offset_k (PKMAP_BASE), PKMAP_BASE), PKMAP_BASE); map_page(KMAP_FIX_BEGIN, 0, 0); /* XXX gross */ kmap_pte = pte_offset_kernel(pmd_offset(pgd_offset_k (KMAP_FIX_BEGIN), KMAP_FIX_BEGIN), KMAP_FIX_BEGIN); kmap_prot = PAGE_KERNEL; #endif /* CONFIG_HIGHMEM */ printk(KERN_DEBUG "Top of RAM: 0x%lx, Total RAM: 0x%lx\n", top_of_ram, total_ram); printk(KERN_DEBUG "Memory hole size: %ldMB\n", (top_of_ram - total_ram) >> 20); memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); #ifdef CONFIG_HIGHMEM max_zone_pfns[ZONE_DMA] = total_lowmem >> PAGE_SHIFT; max_zone_pfns[ZONE_HIGHMEM] = top_of_ram >> PAGE_SHIFT; #else max_zone_pfns[ZONE_DMA] = top_of_ram >> PAGE_SHIFT; #endif free_area_init_nodes(max_zone_pfns); }
/* * paging_init() sets up the page tables - in fact we've already done this. */ static void __init paging_init(void) { unsigned long zones_size[MAX_NR_ZONES]; #ifdef CONFIG_MMU int idx; /* Setup fixmaps */ for (idx = 0; idx < __end_of_fixed_addresses; idx++) clear_fixmap(idx); #endif /* Clean every zones */ memset(zones_size, 0, sizeof(zones_size)); #ifdef CONFIG_HIGHMEM highmem_init(); zones_size[ZONE_DMA] = max_low_pfn; zones_size[ZONE_HIGHMEM] = max_pfn; #else zones_size[ZONE_DMA] = max_pfn; #endif /* We don't have holes in memory map */ free_area_init_nodes(zones_size); }
/* * paging_init() sets up the page tables */ void __init paging_init(void) { unsigned long max_zone_pfns[MAX_NR_ZONES]; unsigned long pgd_type, asce_bits; init_mm.pgd = swapper_pg_dir; if (VMALLOC_END > (1UL << 42)) { asce_bits = _ASCE_TYPE_REGION2 | _ASCE_TABLE_LENGTH; pgd_type = _REGION2_ENTRY_EMPTY; } else { asce_bits = _ASCE_TYPE_REGION3 | _ASCE_TABLE_LENGTH; pgd_type = _REGION3_ENTRY_EMPTY; } S390_lowcore.kernel_asce = (__pa(init_mm.pgd) & PAGE_MASK) | asce_bits; clear_table((unsigned long *) init_mm.pgd, pgd_type, sizeof(unsigned long)*2048); vmem_map_init(); /* enable virtual mapping in kernel mode */ __ctl_load(S390_lowcore.kernel_asce, 1, 1); __ctl_load(S390_lowcore.kernel_asce, 7, 7); __ctl_load(S390_lowcore.kernel_asce, 13, 13); __arch_local_irq_stosm(0x04); sparse_memory_present_with_active_regions(MAX_NUMNODES); sparse_init(); memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); max_zone_pfns[ZONE_DMA] = PFN_DOWN(MAX_DMA_ADDRESS); max_zone_pfns[ZONE_NORMAL] = max_low_pfn; free_area_init_nodes(max_zone_pfns); }
/* * paging_init() sets up the page tables */ void __init paging_init(void) { unsigned long max_zone_pfns[MAX_NR_ZONES]; unsigned long pgd_type, asce_bits; psw_t psw; init_mm.pgd = swapper_pg_dir; if (VMALLOC_END > _REGION2_SIZE) { asce_bits = _ASCE_TYPE_REGION2 | _ASCE_TABLE_LENGTH; pgd_type = _REGION2_ENTRY_EMPTY; } else { asce_bits = _ASCE_TYPE_REGION3 | _ASCE_TABLE_LENGTH; pgd_type = _REGION3_ENTRY_EMPTY; } init_mm.context.asce = (__pa(init_mm.pgd) & PAGE_MASK) | asce_bits; S390_lowcore.kernel_asce = init_mm.context.asce; crst_table_init((unsigned long *) init_mm.pgd, pgd_type); vmem_map_init(); /* enable virtual mapping in kernel mode */ __ctl_load(S390_lowcore.kernel_asce, 1, 1); __ctl_load(S390_lowcore.kernel_asce, 7, 7); __ctl_load(S390_lowcore.kernel_asce, 13, 13); psw.mask = __extract_psw(); psw_bits(psw).dat = 1; psw_bits(psw).as = PSW_BITS_AS_HOME; __load_psw_mask(psw.mask); sparse_memory_present_with_active_regions(MAX_NUMNODES); sparse_init(); memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); max_zone_pfns[ZONE_DMA] = PFN_DOWN(MAX_DMA_ADDRESS); max_zone_pfns[ZONE_NORMAL] = max_low_pfn; free_area_init_nodes(max_zone_pfns); }
void __init paging_init(void) { static const int ssm_mask = 0x04000000L; unsigned long max_zone_pfns[MAX_NR_ZONES]; unsigned long pgd_type; init_mm.pgd = swapper_pg_dir; S390_lowcore.kernel_asce = __pa(init_mm.pgd) & PAGE_MASK; #ifdef CONFIG_64BIT /* A three level page table (4TB) is enough for the kernel space. */ S390_lowcore.kernel_asce |= _ASCE_TYPE_REGION3 | _ASCE_TABLE_LENGTH; pgd_type = _REGION3_ENTRY_EMPTY; #else S390_lowcore.kernel_asce |= _ASCE_TABLE_LENGTH; pgd_type = _SEGMENT_ENTRY_EMPTY; #endif clear_table((unsigned long *) init_mm.pgd, pgd_type, sizeof(unsigned long)*2048); vmem_map_init(); /* enable virtual mapping in kernel mode */ __ctl_load(S390_lowcore.kernel_asce, 1, 1); __ctl_load(S390_lowcore.kernel_asce, 7, 7); __ctl_load(S390_lowcore.kernel_asce, 13, 13); __raw_local_irq_ssm(ssm_mask); sparse_memory_present_with_active_regions(MAX_NUMNODES); sparse_init(); memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); #ifdef CONFIG_ZONE_DMA max_zone_pfns[ZONE_DMA] = PFN_DOWN(MAX_DMA_ADDRESS); #endif max_zone_pfns[ZONE_NORMAL] = max_low_pfn; free_area_init_nodes(max_zone_pfns); }
static void __init zone_sizes_init(unsigned long min, unsigned long max) { unsigned long max_zone_pfns[MAX_NR_ZONES] = {0}; if (IS_ENABLED(CONFIG_ZONE_DMA32)) max_zone_pfns[ZONE_DMA32] = PFN_DOWN(max_zone_dma_phys()); max_zone_pfns[ZONE_NORMAL] = max; free_area_init_nodes(max_zone_pfns); }
void __init paging_init(void) { unsigned long max_zone_pfns[MAX_NR_ZONES]; unsigned long lastpfn; pagetable_init(); max_zone_pfns[ZONE_NORMAL] = max_low_pfn; lastpfn = max_low_pfn; free_area_init_nodes(max_zone_pfns); }
void __init paging_init(void) { unsigned long max_zone_pfns[MAX_NR_ZONES]; memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN; max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN; max_zone_pfns[ZONE_NORMAL] = end_pfn; memory_present(0, 0, end_pfn); sparse_init(); free_area_init_nodes(max_zone_pfns); }
static void __init zone_sizes_init(void) { unsigned long max_zone_pfns[MAX_NR_ZONES] = { 0, }; #ifdef CONFIG_ZONE_DMA32 max_zone_pfns[ZONE_DMA32] = PFN_DOWN(min(4UL * SZ_1G, (unsigned long) PFN_PHYS(max_low_pfn))); #endif max_zone_pfns[ZONE_NORMAL] = max_low_pfn; free_area_init_nodes(max_zone_pfns); }
/* * paging_init() sets up the page tables */ void __init paging_init(void) { unsigned long max_zone_pfns[MAX_NR_ZONES]; int nid; /* We don't need to map the kernel through the TLB, as * it is permanatly mapped using P1. So clear the * entire pgd. */ memset(swapper_pg_dir, 0, sizeof(swapper_pg_dir)); /* Set an initial value for the MMU.TTB so we don't have to * check for a null value. */ set_TTB(swapper_pg_dir); /* Populate the relevant portions of swapper_pg_dir so that * we can use the fixmap entries without calling kmalloc. * pte's will be filled in by __set_fixmap(). */ page_table_range_init(FIXADDR_START, FIXADDR_TOP, swapper_pg_dir); memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); for_each_online_node(nid) { pg_data_t *pgdat = NODE_DATA(nid); unsigned long low, start_pfn; start_pfn = pgdat->bdata->node_min_pfn; low = pgdat->bdata->node_low_pfn; if (max_zone_pfns[ZONE_NORMAL] < low) max_zone_pfns[ZONE_NORMAL] = low; printk("Node %u: start_pfn = 0x%lx, low = 0x%lx\n", nid, start_pfn, low); } free_area_init_nodes(max_zone_pfns); #ifdef CONFIG_SUPERH32 /* Set up the uncached fixmap */ set_fixmap_nocache(FIX_UNCACHED, __pa(&__uncached_start)); #ifdef CONFIG_29BIT /* * Handle trivial transitions between cached and uncached * segments, making use of the 1:1 mapping relationship in * 512MB lowmem. */ cached_to_uncached = P2SEG - P1SEG; #endif #endif }
/* * paging_init() sets up the page tables */ void __init paging_init(void) { unsigned long max_zone_pfns[MAX_NR_ZONES]; unsigned long vaddr; int nid; /* We don't need to map the kernel through the TLB, as * it is permanatly mapped using P1. So clear the * entire pgd. */ memset(swapper_pg_dir, 0, sizeof(swapper_pg_dir)); /* Set an initial value for the MMU.TTB so we don't have to * check for a null value. */ set_TTB(swapper_pg_dir); /* * Populate the relevant portions of swapper_pg_dir so that * we can use the fixmap entries without calling kmalloc. * pte's will be filled in by __set_fixmap(). */ vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK; page_table_range_init(vaddr, 0, swapper_pg_dir); kmap_coherent_init(); memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); for_each_online_node(nid) { pg_data_t *pgdat = NODE_DATA(nid); unsigned long low, start_pfn; start_pfn = pgdat->bdata->node_min_pfn; low = pgdat->bdata->node_low_pfn; if (max_zone_pfns[ZONE_NORMAL] < low) max_zone_pfns[ZONE_NORMAL] = low; printk("Node %u: start_pfn = 0x%lx, low = 0x%lx\n", nid, start_pfn, low); } free_area_init_nodes(max_zone_pfns); /* Set up the uncached fixmap */ set_fixmap_nocache(FIX_UNCACHED, __pa(&__uncached_start)); }
/* * paging_init() sets up the page tables */ void __init paging_init(void) { unsigned long max_zone_pfns[MAX_NR_ZONES]; unsigned long pgd_type, asce_bits; init_mm.pgd = swapper_pg_dir; #ifdef CONFIG_64BIT if (VMALLOC_END > (1UL << 42)) { asce_bits = _ASCE_TYPE_REGION2 | _ASCE_TABLE_LENGTH; pgd_type = _REGION2_ENTRY_EMPTY; } else { asce_bits = _ASCE_TYPE_REGION3 | _ASCE_TABLE_LENGTH; pgd_type = _REGION3_ENTRY_EMPTY; } #else asce_bits = _ASCE_TABLE_LENGTH; pgd_type = _SEGMENT_ENTRY_EMPTY; #endif init_mm.context.asce = (__pa(init_mm.pgd) & PAGE_MASK) | asce_bits; S390_lowcore.kernel_asce = init_mm.context.asce; clear_table((unsigned long *) init_mm.pgd, pgd_type, sizeof(unsigned long)*2048); vmem_map_init(); /* enable virtual mapping in kernel mode */ __ctl_load(S390_lowcore.kernel_asce, 1, 1); __ctl_load(S390_lowcore.kernel_asce, 7, 7); __ctl_load(S390_lowcore.kernel_asce, 13, 13); arch_local_irq_restore(4UL << (BITS_PER_LONG - 8)); atomic_set(&init_mm.context.attach_count, 1); sparse_memory_present_with_active_regions(MAX_NUMNODES); sparse_init(); memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); max_zone_pfns[ZONE_DMA] = PFN_DOWN(MAX_DMA_ADDRESS); max_zone_pfns[ZONE_NORMAL] = max_low_pfn; free_area_init_nodes(max_zone_pfns); }