| /* |
| * Copyright (c) 2000, 2003 Silicon Graphics, Inc. All rights reserved. |
| * Copyright (c) 2001 Intel Corp. |
| * Copyright (c) 2001 Tony Luck <tony.luck@intel.com> |
| * Copyright (c) 2002 NEC Corp. |
| * Copyright (c) 2002 Kimio Suganuma <k-suganuma@da.jp.nec.com> |
| * Copyright (c) 2004 Silicon Graphics, Inc |
| * Russ Anderson <rja@sgi.com> |
| * Jesse Barnes <jbarnes@sgi.com> |
| * Jack Steiner <steiner@sgi.com> |
| */ |
| |
| /* |
| * Platform initialization for Discontig Memory |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/mm.h> |
| #include <linux/nmi.h> |
| #include <linux/swap.h> |
| #include <linux/bootmem.h> |
| #include <linux/acpi.h> |
| #include <linux/efi.h> |
| #include <linux/nodemask.h> |
| #include <asm/pgalloc.h> |
| #include <asm/tlb.h> |
| #include <asm/meminit.h> |
| #include <asm/numa.h> |
| #include <asm/sections.h> |
| |
| /* |
| * Track per-node information needed to setup the boot memory allocator, the |
| * per-node areas, and the real VM. |
| */ |
| struct early_node_data { |
| struct ia64_node_data *node_data; |
| unsigned long pernode_addr; |
| unsigned long pernode_size; |
| unsigned long num_physpages; |
| #ifdef CONFIG_ZONE_DMA |
| unsigned long num_dma_physpages; |
| #endif |
| unsigned long min_pfn; |
| unsigned long max_pfn; |
| }; |
| |
| static struct early_node_data mem_data[MAX_NUMNODES] __initdata; |
| static nodemask_t memory_less_mask __initdata; |
| |
| pg_data_t *pgdat_list[MAX_NUMNODES]; |
| |
| /* |
| * To prevent cache aliasing effects, align per-node structures so that they |
| * start at addresses that are strided by node number. |
| */ |
| #define MAX_NODE_ALIGN_OFFSET (32 * 1024 * 1024) |
| #define NODEDATA_ALIGN(addr, node) \ |
| ((((addr) + 1024*1024-1) & ~(1024*1024-1)) + \ |
| (((node)*PERCPU_PAGE_SIZE) & (MAX_NODE_ALIGN_OFFSET - 1))) |
| |
| /** |
| * build_node_maps - callback to setup bootmem structs for each node |
| * @start: physical start of range |
| * @len: length of range |
| * @node: node where this range resides |
| * |
| * We allocate a struct bootmem_data for each piece of memory that we wish to |
| * treat as a virtually contiguous block (i.e. each node). Each such block |
| * must start on an %IA64_GRANULE_SIZE boundary, so we round the address down |
| * if necessary. Any non-existent pages will simply be part of the virtual |
| * memmap. We also update min_low_pfn and max_low_pfn here as we receive |
| * memory ranges from the caller. |
| */ |
| static int __init build_node_maps(unsigned long start, unsigned long len, |
| int node) |
| { |
| unsigned long spfn, epfn, end = start + len; |
| struct bootmem_data *bdp = &bootmem_node_data[node]; |
| |
| epfn = GRANULEROUNDUP(end) >> PAGE_SHIFT; |
| spfn = GRANULEROUNDDOWN(start) >> PAGE_SHIFT; |
| |
| if (!bdp->node_low_pfn) { |
| bdp->node_min_pfn = spfn; |
| bdp->node_low_pfn = epfn; |
| } else { |
| bdp->node_min_pfn = min(spfn, bdp->node_min_pfn); |
| bdp->node_low_pfn = max(epfn, bdp->node_low_pfn); |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * early_nr_cpus_node - return number of cpus on a given node |
| * @node: node to check |
| * |
| * Count the number of cpus on @node. We can't use nr_cpus_node() yet because |
| * acpi_boot_init() (which builds the node_to_cpu_mask array) hasn't been |
| * called yet. Note that node 0 will also count all non-existent cpus. |
| */ |
| static int __meminit early_nr_cpus_node(int node) |
| { |
| int cpu, n = 0; |
| |
| for_each_possible_early_cpu(cpu) |
| if (node == node_cpuid[cpu].nid) |
| n++; |
| |
| return n; |
| } |
| |
| /** |
| * compute_pernodesize - compute size of pernode data |
| * @node: the node id. |
| */ |
| static unsigned long __meminit compute_pernodesize(int node) |
| { |
| unsigned long pernodesize = 0, cpus; |
| |
| cpus = early_nr_cpus_node(node); |
| pernodesize += PERCPU_PAGE_SIZE * cpus; |
| pernodesize += node * L1_CACHE_BYTES; |
| pernodesize += L1_CACHE_ALIGN(sizeof(pg_data_t)); |
| pernodesize += L1_CACHE_ALIGN(sizeof(struct ia64_node_data)); |
| pernodesize += L1_CACHE_ALIGN(sizeof(pg_data_t)); |
| pernodesize = PAGE_ALIGN(pernodesize); |
| return pernodesize; |
| } |
| |
| /** |
| * per_cpu_node_setup - setup per-cpu areas on each node |
| * @cpu_data: per-cpu area on this node |
| * @node: node to setup |
| * |
| * Copy the static per-cpu data into the region we just set aside and then |
| * setup __per_cpu_offset for each CPU on this node. Return a pointer to |
| * the end of the area. |
| */ |
| static void *per_cpu_node_setup(void *cpu_data, int node) |
| { |
| #ifdef CONFIG_SMP |
| int cpu; |
| |
| for_each_possible_early_cpu(cpu) { |
| void *src = cpu == 0 ? __cpu0_per_cpu : __phys_per_cpu_start; |
| |
| if (node != node_cpuid[cpu].nid) |
| continue; |
| |
| memcpy(__va(cpu_data), src, __per_cpu_end - __per_cpu_start); |
| __per_cpu_offset[cpu] = (char *)__va(cpu_data) - |
| __per_cpu_start; |
| |
| /* |
| * percpu area for cpu0 is moved from the __init area |
| * which is setup by head.S and used till this point. |
| * Update ar.k3. This move is ensures that percpu |
| * area for cpu0 is on the correct node and its |
| * virtual address isn't insanely far from other |
| * percpu areas which is important for congruent |
| * percpu allocator. |
| */ |
| if (cpu == 0) |
| ia64_set_kr(IA64_KR_PER_CPU_DATA, |
| (unsigned long)cpu_data - |
| (unsigned long)__per_cpu_start); |
| |
| cpu_data += PERCPU_PAGE_SIZE; |
| } |
| #endif |
| return cpu_data; |
| } |
| |
| #ifdef CONFIG_SMP |
| /** |
| * setup_per_cpu_areas - setup percpu areas |
| * |
| * Arch code has already allocated and initialized percpu areas. All |
| * this function has to do is to teach the determined layout to the |
| * dynamic percpu allocator, which happens to be more complex than |
| * creating whole new ones using helpers. |
| */ |
| void __init setup_per_cpu_areas(void) |
| { |
| struct pcpu_alloc_info *ai; |
| struct pcpu_group_info *uninitialized_var(gi); |
| unsigned int *cpu_map; |
| void *base; |
| unsigned long base_offset; |
| unsigned int cpu; |
| ssize_t static_size, reserved_size, dyn_size; |
| int node, prev_node, unit, nr_units, rc; |
| |
| ai = pcpu_alloc_alloc_info(MAX_NUMNODES, nr_cpu_ids); |
| if (!ai) |
| panic("failed to allocate pcpu_alloc_info"); |
| cpu_map = ai->groups[0].cpu_map; |
| |
| /* determine base */ |
| base = (void *)ULONG_MAX; |
| for_each_possible_cpu(cpu) |
| base = min(base, |
| (void *)(__per_cpu_offset[cpu] + __per_cpu_start)); |
| base_offset = (void *)__per_cpu_start - base; |
| |
| /* build cpu_map, units are grouped by node */ |
| unit = 0; |
| for_each_node(node) |
| for_each_possible_cpu(cpu) |
| if (node == node_cpuid[cpu].nid) |
| cpu_map[unit++] = cpu; |
| nr_units = unit; |
| |
| /* set basic parameters */ |
| static_size = __per_cpu_end - __per_cpu_start; |
| reserved_size = PERCPU_MODULE_RESERVE; |
| dyn_size = PERCPU_PAGE_SIZE - static_size - reserved_size; |
| if (dyn_size < 0) |
| panic("percpu area overflow static=%zd reserved=%zd\n", |
| static_size, reserved_size); |
| |
| ai->static_size = static_size; |
| ai->reserved_size = reserved_size; |
| ai->dyn_size = dyn_size; |
| ai->unit_size = PERCPU_PAGE_SIZE; |
| ai->atom_size = PAGE_SIZE; |
| ai->alloc_size = PERCPU_PAGE_SIZE; |
| |
| /* |
| * CPUs are put into groups according to node. Walk cpu_map |
| * and create new groups at node boundaries. |
| */ |
| prev_node = -1; |
| ai->nr_groups = 0; |
| for (unit = 0; unit < nr_units; unit++) { |
| cpu = cpu_map[unit]; |
| node = node_cpuid[cpu].nid; |
| |
| if (node == prev_node) { |
| gi->nr_units++; |
| continue; |
| } |
| prev_node = node; |
| |
| gi = &ai->groups[ai->nr_groups++]; |
| gi->nr_units = 1; |
| gi->base_offset = __per_cpu_offset[cpu] + base_offset; |
| gi->cpu_map = &cpu_map[unit]; |
| } |
| |
| rc = pcpu_setup_first_chunk(ai, base); |
| if (rc) |
| panic("failed to setup percpu area (err=%d)", rc); |
| |
| pcpu_free_alloc_info(ai); |
| } |
| #endif |
| |
| /** |
| * fill_pernode - initialize pernode data. |
| * @node: the node id. |
| * @pernode: physical address of pernode data |
| * @pernodesize: size of the pernode data |
| */ |
| static void __init fill_pernode(int node, unsigned long pernode, |
| unsigned long pernodesize) |
| { |
| void *cpu_data; |
| int cpus = early_nr_cpus_node(node); |
| struct bootmem_data *bdp = &bootmem_node_data[node]; |
| |
| mem_data[node].pernode_addr = pernode; |
| mem_data[node].pernode_size = pernodesize; |
| memset(__va(pernode), 0, pernodesize); |
| |
| cpu_data = (void *)pernode; |
| pernode += PERCPU_PAGE_SIZE * cpus; |
| pernode += node * L1_CACHE_BYTES; |
| |
| pgdat_list[node] = __va(pernode); |
| pernode += L1_CACHE_ALIGN(sizeof(pg_data_t)); |
| |
| mem_data[node].node_data = __va(pernode); |
| pernode += L1_CACHE_ALIGN(sizeof(struct ia64_node_data)); |
| |
| pgdat_list[node]->bdata = bdp; |
| pernode += L1_CACHE_ALIGN(sizeof(pg_data_t)); |
| |
| cpu_data = per_cpu_node_setup(cpu_data, node); |
| |
| return; |
| } |
| |
| /** |
| * find_pernode_space - allocate memory for memory map and per-node structures |
| * @start: physical start of range |
| * @len: length of range |
| * @node: node where this range resides |
| * |
| * This routine reserves space for the per-cpu data struct, the list of |
| * pg_data_ts and the per-node data struct. Each node will have something like |
| * the following in the first chunk of addr. space large enough to hold it. |
| * |
| * ________________________ |
| * | | |
| * |~~~~~~~~~~~~~~~~~~~~~~~~| <-- NODEDATA_ALIGN(start, node) for the first |
| * | PERCPU_PAGE_SIZE * | start and length big enough |
| * | cpus_on_this_node | Node 0 will also have entries for all non-existent cpus. |
| * |------------------------| |
| * | local pg_data_t * | |
| * |------------------------| |
| * | local ia64_node_data | |
| * |------------------------| |
| * | ??? | |
| * |________________________| |
| * |
| * Once this space has been set aside, the bootmem maps are initialized. We |
| * could probably move the allocation of the per-cpu and ia64_node_data space |
| * outside of this function and use alloc_bootmem_node(), but doing it here |
| * is straightforward and we get the alignments we want so... |
| */ |
| static int __init find_pernode_space(unsigned long start, unsigned long len, |
| int node) |
| { |
| unsigned long spfn, epfn; |
| unsigned long pernodesize = 0, pernode, pages, mapsize; |
| struct bootmem_data *bdp = &bootmem_node_data[node]; |
| |
| spfn = start >> PAGE_SHIFT; |
| epfn = (start + len) >> PAGE_SHIFT; |
| |
| pages = bdp->node_low_pfn - bdp->node_min_pfn; |
| mapsize = bootmem_bootmap_pages(pages) << PAGE_SHIFT; |
| |
| /* |
| * Make sure this memory falls within this node's usable memory |
| * since we may have thrown some away in build_maps(). |
| */ |
| if (spfn < bdp->node_min_pfn || epfn > bdp->node_low_pfn) |
| return 0; |
| |
| /* Don't setup this node's local space twice... */ |
| if (mem_data[node].pernode_addr) |
| return 0; |
| |
| /* |
| * Calculate total size needed, incl. what's necessary |
| * for good alignment and alias prevention. |
| */ |
| pernodesize = compute_pernodesize(node); |
| pernode = NODEDATA_ALIGN(start, node); |
| |
| /* Is this range big enough for what we want to store here? */ |
| if (start + len > (pernode + pernodesize + mapsize)) |
| fill_pernode(node, pernode, pernodesize); |
| |
| return 0; |
| } |
| |
| /** |
| * free_node_bootmem - free bootmem allocator memory for use |
| * @start: physical start of range |
| * @len: length of range |
| * @node: node where this range resides |
| * |
| * Simply calls the bootmem allocator to free the specified ranged from |
| * the given pg_data_t's bdata struct. After this function has been called |
| * for all the entries in the EFI memory map, the bootmem allocator will |
| * be ready to service allocation requests. |
| */ |
| static int __init free_node_bootmem(unsigned long start, unsigned long len, |
| int node) |
| { |
| free_bootmem_node(pgdat_list[node], start, len); |
| |
| return 0; |
| } |
| |
| /** |
| * reserve_pernode_space - reserve memory for per-node space |
| * |
| * Reserve the space used by the bootmem maps & per-node space in the boot |
| * allocator so that when we actually create the real mem maps we don't |
| * use their memory. |
| */ |
| static void __init reserve_pernode_space(void) |
| { |
| unsigned long base, size, pages; |
| struct bootmem_data *bdp; |
| int node; |
| |
| for_each_online_node(node) { |
| pg_data_t *pdp = pgdat_list[node]; |
| |
| if (node_isset(node, memory_less_mask)) |
| continue; |
| |
| bdp = pdp->bdata; |
| |
| /* First the bootmem_map itself */ |
| pages = bdp->node_low_pfn - bdp->node_min_pfn; |
| size = bootmem_bootmap_pages(pages) << PAGE_SHIFT; |
| base = __pa(bdp->node_bootmem_map); |
| reserve_bootmem_node(pdp, base, size, BOOTMEM_DEFAULT); |
| |
| /* Now the per-node space */ |
| size = mem_data[node].pernode_size; |
| base = __pa(mem_data[node].pernode_addr); |
| reserve_bootmem_node(pdp, base, size, BOOTMEM_DEFAULT); |
| } |
| } |
| |
| static void __meminit scatter_node_data(void) |
| { |
| pg_data_t **dst; |
| int node; |
| |
| /* |
| * for_each_online_node() can't be used at here. |
| * node_online_map is not set for hot-added nodes at this time, |
| * because we are halfway through initialization of the new node's |
| * structures. If for_each_online_node() is used, a new node's |
| * pg_data_ptrs will be not initialized. Instead of using it, |
| * pgdat_list[] is checked. |
| */ |
| for_each_node(node) { |
| if (pgdat_list[node]) { |
| dst = LOCAL_DATA_ADDR(pgdat_list[node])->pg_data_ptrs; |
| memcpy(dst, pgdat_list, sizeof(pgdat_list)); |
| } |
| } |
| } |
| |
| /** |
| * initialize_pernode_data - fixup per-cpu & per-node pointers |
| * |
| * Each node's per-node area has a copy of the global pg_data_t list, so |
| * we copy that to each node here, as well as setting the per-cpu pointer |
| * to the local node data structure. The active_cpus field of the per-node |
| * structure gets setup by the platform_cpu_init() function later. |
| */ |
| static void __init initialize_pernode_data(void) |
| { |
| int cpu, node; |
| |
| scatter_node_data(); |
| |
| #ifdef CONFIG_SMP |
| /* Set the node_data pointer for each per-cpu struct */ |
| for_each_possible_early_cpu(cpu) { |
| node = node_cpuid[cpu].nid; |
| per_cpu(ia64_cpu_info, cpu).node_data = |
| mem_data[node].node_data; |
| } |
| #else |
| { |
| struct cpuinfo_ia64 *cpu0_cpu_info; |
| cpu = 0; |
| node = node_cpuid[cpu].nid; |
| cpu0_cpu_info = (struct cpuinfo_ia64 *)(__phys_per_cpu_start + |
| ((char *)&ia64_cpu_info - __per_cpu_start)); |
| cpu0_cpu_info->node_data = mem_data[node].node_data; |
| } |
| #endif /* CONFIG_SMP */ |
| } |
| |
| /** |
| * memory_less_node_alloc - * attempt to allocate memory on the best NUMA slit |
| * node but fall back to any other node when __alloc_bootmem_node fails |
| * for best. |
| * @nid: node id |
| * @pernodesize: size of this node's pernode data |
| */ |
| static void __init *memory_less_node_alloc(int nid, unsigned long pernodesize) |
| { |
| void *ptr = NULL; |
| u8 best = 0xff; |
| int bestnode = -1, node, anynode = 0; |
| |
| for_each_online_node(node) { |
| if (node_isset(node, memory_less_mask)) |
| continue; |
| else if (node_distance(nid, node) < best) { |
| best = node_distance(nid, node); |
| bestnode = node; |
| } |
| anynode = node; |
| } |
| |
| if (bestnode == -1) |
| bestnode = anynode; |
| |
| ptr = __alloc_bootmem_node(pgdat_list[bestnode], pernodesize, |
| PERCPU_PAGE_SIZE, __pa(MAX_DMA_ADDRESS)); |
| |
| return ptr; |
| } |
| |
| /** |
| * memory_less_nodes - allocate and initialize CPU only nodes pernode |
| * information. |
| */ |
| static void __init memory_less_nodes(void) |
| { |
| unsigned long pernodesize; |
| void *pernode; |
| int node; |
| |
| for_each_node_mask(node, memory_less_mask) { |
| pernodesize = compute_pernodesize(node); |
| pernode = memory_less_node_alloc(node, pernodesize); |
| fill_pernode(node, __pa(pernode), pernodesize); |
| } |
| |
| return; |
| } |
| |
| /** |
| * find_memory - walk the EFI memory map and setup the bootmem allocator |
| * |
| * Called early in boot to setup the bootmem allocator, and to |
| * allocate the per-cpu and per-node structures. |
| */ |
| void __init find_memory(void) |
| { |
| int node; |
| |
| reserve_memory(); |
| |
| if (num_online_nodes() == 0) { |
| printk(KERN_ERR "node info missing!\n"); |
| node_set_online(0); |
| } |
| |
| nodes_or(memory_less_mask, memory_less_mask, node_online_map); |
| min_low_pfn = -1; |
| max_low_pfn = 0; |
| |
| /* These actually end up getting called by call_pernode_memory() */ |
| efi_memmap_walk(filter_rsvd_memory, build_node_maps); |
| efi_memmap_walk(filter_rsvd_memory, find_pernode_space); |
| efi_memmap_walk(find_max_min_low_pfn, NULL); |
| |
| for_each_online_node(node) |
| if (bootmem_node_data[node].node_low_pfn) { |
| node_clear(node, memory_less_mask); |
| mem_data[node].min_pfn = ~0UL; |
| } |
| |
| efi_memmap_walk(filter_memory, register_active_ranges); |
| |
| /* |
| * Initialize the boot memory maps in reverse order since that's |
| * what the bootmem allocator expects |
| */ |
| for (node = MAX_NUMNODES - 1; node >= 0; node--) { |
| unsigned long pernode, pernodesize, map; |
| struct bootmem_data *bdp; |
| |
| if (!node_online(node)) |
| continue; |
| else if (node_isset(node, memory_less_mask)) |
| continue; |
| |
| bdp = &bootmem_node_data[node]; |
| pernode = mem_data[node].pernode_addr; |
| pernodesize = mem_data[node].pernode_size; |
| map = pernode + pernodesize; |
| |
| init_bootmem_node(pgdat_list[node], |
| map>>PAGE_SHIFT, |
| bdp->node_min_pfn, |
| bdp->node_low_pfn); |
| } |
| |
| efi_memmap_walk(filter_rsvd_memory, free_node_bootmem); |
| |
| reserve_pernode_space(); |
| memory_less_nodes(); |
| initialize_pernode_data(); |
| |
| max_pfn = max_low_pfn; |
| |
| find_initrd(); |
| } |
| |
| #ifdef CONFIG_SMP |
| /** |
| * per_cpu_init - setup per-cpu variables |
| * |
| * find_pernode_space() does most of this already, we just need to set |
| * local_per_cpu_offset |
| */ |
| void __cpuinit *per_cpu_init(void) |
| { |
| int cpu; |
| static int first_time = 1; |
| |
| if (first_time) { |
| first_time = 0; |
| for_each_possible_early_cpu(cpu) |
| per_cpu(local_per_cpu_offset, cpu) = __per_cpu_offset[cpu]; |
| } |
| |
| return __per_cpu_start + __per_cpu_offset[smp_processor_id()]; |
| } |
| #endif /* CONFIG_SMP */ |
| |
| /** |
| * show_mem - give short summary of memory stats |
| * |
| * Shows a simple page count of reserved and used pages in the system. |
| * For discontig machines, it does this on a per-pgdat basis. |
| */ |
| void show_mem(void) |
| { |
| int i, total_reserved = 0; |
| int total_shared = 0, total_cached = 0; |
| unsigned long total_present = 0; |
| pg_data_t *pgdat; |
| |
| printk(KERN_INFO "Mem-info:\n"); |
| show_free_areas(); |
| printk(KERN_INFO "Node memory in pages:\n"); |
| for_each_online_pgdat(pgdat) { |
| unsigned long present; |
| unsigned long flags; |
| int shared = 0, cached = 0, reserved = 0; |
| |
| pgdat_resize_lock(pgdat, &flags); |
| present = pgdat->node_present_pages; |
| for(i = 0; i < pgdat->node_spanned_pages; i++) { |
| struct page *page; |
| if (unlikely(i % MAX_ORDER_NR_PAGES == 0)) |
| touch_nmi_watchdog(); |
| if (pfn_valid(pgdat->node_start_pfn + i)) |
| page = pfn_to_page(pgdat->node_start_pfn + i); |
| else { |
| i = vmemmap_find_next_valid_pfn(pgdat->node_id, |
| i) - 1; |
| continue; |
| } |
| if (PageReserved(page)) |
| reserved++; |
| else if (PageSwapCache(page)) |
| cached++; |
| else if (page_count(page)) |
| shared += page_count(page)-1; |
| } |
| pgdat_resize_unlock(pgdat, &flags); |
| total_present += present; |
| total_reserved += reserved; |
| total_cached += cached; |
| total_shared += shared; |
| printk(KERN_INFO "Node %4d: RAM: %11ld, rsvd: %8d, " |
| "shrd: %10d, swpd: %10d\n", pgdat->node_id, |
| present, reserved, shared, cached); |
| } |
| printk(KERN_INFO "%ld pages of RAM\n", total_present); |
| printk(KERN_INFO "%d reserved pages\n", total_reserved); |
| printk(KERN_INFO "%d pages shared\n", total_shared); |
| printk(KERN_INFO "%d pages swap cached\n", total_cached); |
| printk(KERN_INFO "Total of %ld pages in page table cache\n", |
| quicklist_total_size()); |
| printk(KERN_INFO "%d free buffer pages\n", nr_free_buffer_pages()); |
| } |
| |
| /** |
| * call_pernode_memory - use SRAT to call callback functions with node info |
| * @start: physical start of range |
| * @len: length of range |
| * @arg: function to call for each range |
| * |
| * efi_memmap_walk() knows nothing about layout of memory across nodes. Find |
| * out to which node a block of memory belongs. Ignore memory that we cannot |
| * identify, and split blocks that run across multiple nodes. |
| * |
| * Take this opportunity to round the start address up and the end address |
| * down to page boundaries. |
| */ |
| void call_pernode_memory(unsigned long start, unsigned long len, void *arg) |
| { |
| unsigned long rs, re, end = start + len; |
| void (*func)(unsigned long, unsigned long, int); |
| int i; |
| |
| start = PAGE_ALIGN(start); |
| end &= PAGE_MASK; |
| if (start >= end) |
| return; |
| |
| func = arg; |
| |
| if (!num_node_memblks) { |
| /* No SRAT table, so assume one node (node 0) */ |
| if (start < end) |
| (*func)(start, end - start, 0); |
| return; |
| } |
| |
| for (i = 0; i < num_node_memblks; i++) { |
| rs = max(start, node_memblk[i].start_paddr); |
| re = min(end, node_memblk[i].start_paddr + |
| node_memblk[i].size); |
| |
| if (rs < re) |
| (*func)(rs, re - rs, node_memblk[i].nid); |
| |
| if (re == end) |
| break; |
| } |
| } |
| |
| /** |
| * count_node_pages - callback to build per-node memory info structures |
| * @start: physical start of range |
| * @len: length of range |
| * @node: node where this range resides |
| * |
| * Each node has it's own number of physical pages, DMAable pages, start, and |
| * end page frame number. This routine will be called by call_pernode_memory() |
| * for each piece of usable memory and will setup these values for each node. |
| * Very similar to build_maps(). |
| */ |
| static __init int count_node_pages(unsigned long start, unsigned long len, int node) |
| { |
| unsigned long end = start + len; |
| |
| mem_data[node].num_physpages += len >> PAGE_SHIFT; |
| #ifdef CONFIG_ZONE_DMA |
| if (start <= __pa(MAX_DMA_ADDRESS)) |
| mem_data[node].num_dma_physpages += |
| (min(end, __pa(MAX_DMA_ADDRESS)) - start) >>PAGE_SHIFT; |
| #endif |
| start = GRANULEROUNDDOWN(start); |
| end = GRANULEROUNDUP(end); |
| mem_data[node].max_pfn = max(mem_data[node].max_pfn, |
| end >> PAGE_SHIFT); |
| mem_data[node].min_pfn = min(mem_data[node].min_pfn, |
| start >> PAGE_SHIFT); |
| |
| return 0; |
| } |
| |
| /** |
| * paging_init - setup page tables |
| * |
| * paging_init() sets up the page tables for each node of the system and frees |
| * the bootmem allocator memory for general use. |
| */ |
| void __init paging_init(void) |
| { |
| unsigned long max_dma; |
| unsigned long pfn_offset = 0; |
| unsigned long max_pfn = 0; |
| int node; |
| unsigned long max_zone_pfns[MAX_NR_ZONES]; |
| |
| max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT; |
| |
| efi_memmap_walk(filter_rsvd_memory, count_node_pages); |
| |
| sparse_memory_present_with_active_regions(MAX_NUMNODES); |
| sparse_init(); |
| |
| #ifdef CONFIG_VIRTUAL_MEM_MAP |
| VMALLOC_END -= PAGE_ALIGN(ALIGN(max_low_pfn, MAX_ORDER_NR_PAGES) * |
| sizeof(struct page)); |
| vmem_map = (struct page *) VMALLOC_END; |
| efi_memmap_walk(create_mem_map_page_table, NULL); |
| printk("Virtual mem_map starts at 0x%p\n", vmem_map); |
| #endif |
| |
| for_each_online_node(node) { |
| num_physpages += mem_data[node].num_physpages; |
| pfn_offset = mem_data[node].min_pfn; |
| |
| #ifdef CONFIG_VIRTUAL_MEM_MAP |
| NODE_DATA(node)->node_mem_map = vmem_map + pfn_offset; |
| #endif |
| if (mem_data[node].max_pfn > max_pfn) |
| max_pfn = mem_data[node].max_pfn; |
| } |
| |
| memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); |
| #ifdef CONFIG_ZONE_DMA |
| max_zone_pfns[ZONE_DMA] = max_dma; |
| #endif |
| max_zone_pfns[ZONE_NORMAL] = max_pfn; |
| free_area_init_nodes(max_zone_pfns); |
| |
| zero_page_memmap_ptr = virt_to_page(ia64_imva(empty_zero_page)); |
| } |
| |
| #ifdef CONFIG_MEMORY_HOTPLUG |
| pg_data_t *arch_alloc_nodedata(int nid) |
| { |
| unsigned long size = compute_pernodesize(nid); |
| |
| return kzalloc(size, GFP_KERNEL); |
| } |
| |
| void arch_free_nodedata(pg_data_t *pgdat) |
| { |
| kfree(pgdat); |
| } |
| |
| void arch_refresh_nodedata(int update_node, pg_data_t *update_pgdat) |
| { |
| pgdat_list[update_node] = update_pgdat; |
| scatter_node_data(); |
| } |
| #endif |
| |
| #ifdef CONFIG_SPARSEMEM_VMEMMAP |
| int __meminit vmemmap_populate(struct page *start_page, |
| unsigned long size, int node) |
| { |
| return vmemmap_populate_basepages(start_page, size, node); |
| } |
| #endif |