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Diffstat (limited to 'arch/ia64/mm/discontig.c')
| -rw-r--r-- | arch/ia64/mm/discontig.c | 635 |
1 files changed, 0 insertions, 635 deletions
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c deleted file mode 100644 index 73d0db36ed..0000000000 --- a/arch/ia64/mm/discontig.c +++ /dev/null @@ -1,635 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * 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/memblock.h> -#include <linux/acpi.h> -#include <linux/efi.h> -#include <linux/nodemask.h> -#include <linux/slab.h> -#include <asm/efi.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 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 mem_data structs for each node - * @start: physical start of range - * @len: length of range - * @node: node where this range resides - * - * Detect extents of 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. - */ -static int __init build_node_maps(unsigned long start, unsigned long len, - int node) -{ - unsigned long spfn, epfn, end = start + len; - - epfn = GRANULEROUNDUP(end) >> PAGE_SHIFT; - spfn = GRANULEROUNDDOWN(start) >> PAGE_SHIFT; - - if (!mem_data[node].min_pfn) { - mem_data[node].min_pfn = spfn; - mem_data[node].max_pfn = epfn; - } else { - mem_data[node].min_pfn = min(spfn, mem_data[node].min_pfn); - mem_data[node].max_pfn = max(epfn, mem_data[node].max_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 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 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 *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; - - 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 = NUMA_NO_NODE; - 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]; - } - - pcpu_setup_first_chunk(ai, base); - 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); - - 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)); - 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; - - spfn = start >> PAGE_SHIFT; - epfn = (start + len) >> 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 < mem_data[node].min_pfn || epfn > mem_data[node].max_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)) - fill_pernode(node, pernode, pernodesize); - - 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; - int node; - - for_each_online_node(node) { - if (node_isset(node, memory_less_mask)) - continue; - - /* Now the per-node space */ - size = mem_data[node].pernode_size; - base = __pa(mem_data[node].pernode_addr); - memblock_reserve(base, size); - } -} - -static void 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. - */ -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 = NUMA_NO_NODE, 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 == NUMA_NO_NODE) - bestnode = anynode; - - ptr = memblock_alloc_try_nid(pernodesize, PERCPU_PAGE_SIZE, - __pa(MAX_DMA_ADDRESS), - MEMBLOCK_ALLOC_ACCESSIBLE, - bestnode); - if (!ptr) - panic("%s: Failed to allocate %lu bytes align=0x%lx nid=%d from=%lx\n", - __func__, pernodesize, PERCPU_PAGE_SIZE, bestnode, - __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(); - efi_memmap_walk(filter_memory, register_active_ranges); - - 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 (mem_data[node].min_pfn) - node_clear(node, memory_less_mask); - - 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 *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 */ - -/** - * 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; - } -} - -/** - * 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 max_zone_pfns[MAX_NR_ZONES]; - - max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT; - - sparse_init(); - - memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); - max_zone_pfns[ZONE_DMA32] = max_dma; - max_zone_pfns[ZONE_NORMAL] = max_low_pfn; - free_area_init(max_zone_pfns); - - zero_page_memmap_ptr = virt_to_page(ia64_imva(empty_zero_page)); -} - -pg_data_t * __init arch_alloc_nodedata(int nid) -{ - unsigned long size = compute_pernodesize(nid); - - return memblock_alloc(size, SMP_CACHE_BYTES); -} - -void arch_refresh_nodedata(int update_node, pg_data_t *update_pgdat) -{ - pgdat_list[update_node] = update_pgdat; - scatter_node_data(); -} - -#ifdef CONFIG_SPARSEMEM_VMEMMAP -int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node, - struct vmem_altmap *altmap) -{ - return vmemmap_populate_basepages(start, end, node, NULL); -} - -void vmemmap_free(unsigned long start, unsigned long end, - struct vmem_altmap *altmap) -{ -} -#endif |