483 lines
12 KiB
C
483 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Author: Xiang Gao <gaoxiang@loongson.cn>
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* Huacai Chen <chenhuacai@loongson.cn>
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*
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/mmzone.h>
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#include <linux/export.h>
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#include <linux/nodemask.h>
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#include <linux/swap.h>
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#include <linux/memblock.h>
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#include <linux/pfn.h>
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#include <linux/acpi.h>
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#include <linux/efi.h>
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#include <linux/irq.h>
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#include <linux/pci.h>
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#include <asm/bootinfo.h>
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#include <asm/loongson.h>
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#include <asm/numa.h>
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#include <asm/page.h>
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#include <asm/pgalloc.h>
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#include <asm/sections.h>
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#include <asm/time.h>
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#include "legacy_boot.h"
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int numa_off;
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struct pglist_data *node_data[MAX_NUMNODES];
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unsigned char node_distances[MAX_NUMNODES][MAX_NUMNODES];
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EXPORT_SYMBOL(node_data);
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EXPORT_SYMBOL(node_distances);
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static struct numa_meminfo numa_meminfo;
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cpumask_t cpus_on_node[MAX_NUMNODES];
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cpumask_t phys_cpus_on_node[MAX_NUMNODES];
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EXPORT_SYMBOL(cpus_on_node);
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/*
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* apicid, cpu, node mappings
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*/
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s16 __cpuid_to_node[CONFIG_NR_CPUS] = {
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[0 ... CONFIG_NR_CPUS - 1] = NUMA_NO_NODE
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};
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EXPORT_SYMBOL(__cpuid_to_node);
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nodemask_t numa_nodes_parsed __initdata;
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#ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA
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unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
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EXPORT_SYMBOL(__per_cpu_offset);
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static int __init pcpu_cpu_to_node(int cpu)
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{
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return early_cpu_to_node(cpu);
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}
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static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
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{
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if (early_cpu_to_node(from) == early_cpu_to_node(to))
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return LOCAL_DISTANCE;
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else
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return REMOTE_DISTANCE;
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}
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void __init pcpu_populate_pte(unsigned long addr)
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{
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populate_kernel_pte(addr);
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}
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void __init setup_per_cpu_areas(void)
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{
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unsigned long delta;
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unsigned int cpu;
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int rc = -EINVAL;
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if (pcpu_chosen_fc == PCPU_FC_AUTO) {
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if (nr_node_ids >= 8)
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pcpu_chosen_fc = PCPU_FC_PAGE;
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else
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pcpu_chosen_fc = PCPU_FC_EMBED;
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}
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/*
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* Always reserve area for module percpu variables. That's
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* what the legacy allocator did.
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*/
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if (pcpu_chosen_fc != PCPU_FC_PAGE) {
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rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE,
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PERCPU_DYNAMIC_RESERVE, PMD_SIZE,
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pcpu_cpu_distance, pcpu_cpu_to_node);
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if (rc < 0)
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pr_warn("%s allocator failed (%d), falling back to page size\n",
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pcpu_fc_names[pcpu_chosen_fc], rc);
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}
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if (rc < 0)
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rc = pcpu_page_first_chunk(PERCPU_MODULE_RESERVE, pcpu_cpu_to_node);
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if (rc < 0)
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panic("cannot initialize percpu area (err=%d)", rc);
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delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start;
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for_each_possible_cpu(cpu)
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__per_cpu_offset[cpu] = delta + pcpu_unit_offsets[cpu];
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}
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#endif
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/*
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* Get nodeid by logical cpu number.
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* __cpuid_to_node maps phyical cpu id to node, so we
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* should use cpu_logical_map(cpu) to index it.
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*
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* This routine is only used in early phase during
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* booting, after setup_per_cpu_areas calling and numa_node
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* initialization, cpu_to_node will be used instead.
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*/
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int early_cpu_to_node(int cpu)
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{
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int physid = cpu_logical_map(cpu);
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if (physid < 0)
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return NUMA_NO_NODE;
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return __cpuid_to_node[physid];
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}
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void __init early_numa_add_cpu(int cpuid, s16 node)
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{
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int cpu = __cpu_number_map[cpuid];
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if (cpu < 0)
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return;
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cpumask_set_cpu(cpu, &cpus_on_node[node]);
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cpumask_set_cpu(cpuid, &phys_cpus_on_node[node]);
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}
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void numa_add_cpu(unsigned int cpu)
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{
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int nid = cpu_to_node(cpu);
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cpumask_set_cpu(cpu, &cpus_on_node[nid]);
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}
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void numa_remove_cpu(unsigned int cpu)
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{
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int nid = cpu_to_node(cpu);
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cpumask_clear_cpu(cpu, &cpus_on_node[nid]);
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}
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static int __init numa_add_memblk_to(int nid, u64 start, u64 end,
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struct numa_meminfo *mi)
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{
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/* ignore zero length blks */
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if (start == end)
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return 0;
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/* whine about and ignore invalid blks */
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if (start > end || nid < 0 || nid >= MAX_NUMNODES) {
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pr_warn("NUMA: Warning: invalid memblk node %d [mem %#010Lx-%#010Lx]\n",
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nid, start, end - 1);
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return 0;
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}
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if (mi->nr_blks >= NR_NODE_MEMBLKS) {
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pr_err("NUMA: too many memblk ranges\n");
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return -EINVAL;
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}
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mi->blk[mi->nr_blks].start = PFN_ALIGN(start);
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mi->blk[mi->nr_blks].end = PFN_ALIGN(end - PAGE_SIZE + 1);
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mi->blk[mi->nr_blks].nid = nid;
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mi->nr_blks++;
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return 0;
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}
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/**
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* numa_add_memblk - Add one numa_memblk to numa_meminfo
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* @nid: NUMA node ID of the new memblk
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* @start: Start address of the new memblk
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* @end: End address of the new memblk
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*
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* Add a new memblk to the default numa_meminfo.
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*
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* RETURNS:
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* 0 on success, -errno on failure.
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*/
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int __init numa_add_memblk(int nid, u64 start, u64 end)
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{
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return numa_add_memblk_to(nid, start, end, &numa_meminfo);
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}
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static void __init alloc_node_data(int nid)
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{
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void *nd;
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unsigned long nd_pa;
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size_t nd_sz = roundup(sizeof(pg_data_t), PAGE_SIZE);
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nd_pa = memblock_phys_alloc_try_nid(nd_sz, SMP_CACHE_BYTES, nid);
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if (!nd_pa) {
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pr_err("Cannot find %zu Byte for node_data (initial node: %d)\n", nd_sz, nid);
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return;
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}
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nd = __va(nd_pa);
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node_data[nid] = nd;
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memset(nd, 0, sizeof(pg_data_t));
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}
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static void __init node_mem_init(unsigned int node)
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{
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unsigned long start_pfn, end_pfn;
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unsigned long node_addrspace_offset;
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node_addrspace_offset = nid_to_addrbase(node);
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pr_info("Node%d's addrspace_offset is 0x%lx\n",
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node, node_addrspace_offset);
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get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
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pr_info("Node%d: start_pfn=0x%lx, end_pfn=0x%lx\n",
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node, start_pfn, end_pfn);
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alloc_node_data(node);
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}
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#ifdef CONFIG_ACPI_NUMA
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/*
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* Sanity check to catch more bad NUMA configurations (they are amazingly
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* common). Make sure the nodes cover all memory.
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*/
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static bool __init numa_meminfo_cover_memory(const struct numa_meminfo *mi)
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{
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int i;
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u64 numaram, biosram;
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numaram = 0;
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for (i = 0; i < mi->nr_blks; i++) {
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u64 s = mi->blk[i].start >> PAGE_SHIFT;
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u64 e = mi->blk[i].end >> PAGE_SHIFT;
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numaram += e - s;
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numaram -= __absent_pages_in_range(mi->blk[i].nid, s, e);
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if ((s64)numaram < 0)
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numaram = 0;
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}
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max_pfn = max_low_pfn;
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biosram = max_pfn - absent_pages_in_range(0, max_pfn);
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BUG_ON((s64)(biosram - numaram) >= (1 << (20 - PAGE_SHIFT)));
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return true;
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}
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static void __init add_node_intersection(u32 node, u64 start, u64 size, u32 type)
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{
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static unsigned long num_physpages;
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num_physpages += (size >> PAGE_SHIFT);
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pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx Bytes\n",
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node, type, start, size);
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pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
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start >> PAGE_SHIFT, (start + size) >> PAGE_SHIFT, num_physpages);
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memblock_set_node(start, size, &memblock.memory, node);
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}
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/*
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* add_numamem_region
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*
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* Add a uasable memory region described by BIOS. The
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* routine gets each intersection between BIOS's region
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* and node's region, and adds them into node's memblock
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* pool.
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*
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*/
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static void __init add_numamem_region(u64 start, u64 end, u32 type)
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{
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u32 i;
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u64 ofs = start;
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if (start >= end) {
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pr_debug("Invalid region: %016llx-%016llx\n", start, end);
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return;
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}
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for (i = 0; i < numa_meminfo.nr_blks; i++) {
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struct numa_memblk *mb = &numa_meminfo.blk[i];
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if (ofs > mb->end)
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continue;
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if (end > mb->end) {
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add_node_intersection(mb->nid, ofs, mb->end - ofs, type);
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ofs = mb->end;
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} else {
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add_node_intersection(mb->nid, ofs, end - ofs, type);
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break;
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}
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}
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}
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static void __init init_node_memblock(void)
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{
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u32 i, mem_type;
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u64 mem_end, mem_start, mem_size;
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efi_memory_desc_t *md;
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if (g_mmap) {
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for (i = 0; i < g_mmap->map_count; i++) {
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mem_type = g_mmap->map[i].mem_type;
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mem_start = g_mmap->map[i].mem_start;
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mem_size = g_mmap->map[i].mem_size;
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mem_end = g_mmap->map[i].mem_start + mem_size;
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switch (mem_type) {
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case ADDRESS_TYPE_SYSRAM:
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mem_start = PFN_ALIGN(mem_start);
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mem_end = PFN_ALIGN(mem_end - PAGE_SIZE + 1);
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if (mem_start >= mem_end)
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break;
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add_numamem_region(mem_start, mem_end, EFI_PERSISTENT_MEMORY);
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break;
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case ADDRESS_TYPE_ACPI:
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mem_start = PFN_ALIGN(mem_start - PAGE_SIZE + 1);
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mem_end = PFN_ALIGN(mem_end);
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mem_size = mem_end - mem_start;
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memblock_add(mem_start, mem_size);
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memblock_mark_nomap(mem_start, mem_size);
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memblock_set_node(mem_start, mem_size,
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&memblock.memory, 0);
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memblock_reserve(mem_start, mem_size);
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break;
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case ADDRESS_TYPE_RESERVED:
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memblock_reserve(mem_start, mem_size);
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break;
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}
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}
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return;
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}
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/* Parse memory information and activate */
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for_each_efi_memory_desc(md) {
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mem_type = md->type;
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mem_start = md->phys_addr;
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mem_size = md->num_pages << EFI_PAGE_SHIFT;
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mem_end = mem_start + mem_size;
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switch (mem_type) {
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case EFI_LOADER_CODE:
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case EFI_LOADER_DATA:
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case EFI_BOOT_SERVICES_CODE:
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case EFI_BOOT_SERVICES_DATA:
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case EFI_PERSISTENT_MEMORY:
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case EFI_CONVENTIONAL_MEMORY:
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add_numamem_region(mem_start, mem_end, mem_type);
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break;
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case EFI_PAL_CODE:
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case EFI_UNUSABLE_MEMORY:
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case EFI_ACPI_RECLAIM_MEMORY:
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add_numamem_region(mem_start, mem_end, mem_type);
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fallthrough;
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case EFI_RESERVED_TYPE:
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case EFI_RUNTIME_SERVICES_CODE:
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case EFI_RUNTIME_SERVICES_DATA:
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case EFI_MEMORY_MAPPED_IO:
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case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
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pr_info("Resvd: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx Bytes\n",
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mem_type, mem_start, mem_size);
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break;
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}
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}
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}
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static void __init numa_default_distance(void)
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{
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int row, col;
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for (row = 0; row < MAX_NUMNODES; row++)
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for (col = 0; col < MAX_NUMNODES; col++) {
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if (col == row)
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node_distances[row][col] = LOCAL_DISTANCE;
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else
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/* We assume that one node per package here!
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*
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* A SLIT should be used for multiple nodes
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* per package to override default setting.
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*/
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node_distances[row][col] = REMOTE_DISTANCE;
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}
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}
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/*
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* fake_numa_init() - For Non-ACPI systems
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* Return: 0 on success, -errno on failure.
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*/
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static int __init fake_numa_init(void)
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{
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phys_addr_t start = memblock_start_of_DRAM();
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phys_addr_t end = memblock_end_of_DRAM() - 1;
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node_set(0, numa_nodes_parsed);
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pr_info("Faking a node at [mem %pap-%pap]\n", &start, &end);
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return numa_add_memblk(0, start, end + 1);
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}
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int __init init_numa_memory(void)
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{
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int i;
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int ret;
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int node;
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for (i = 0; i < NR_CPUS; i++)
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set_cpuid_to_node(i, NUMA_NO_NODE);
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numa_default_distance();
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nodes_clear(numa_nodes_parsed);
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nodes_clear(node_possible_map);
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nodes_clear(node_online_map);
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memset(&numa_meminfo, 0, sizeof(numa_meminfo));
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/* Parse SRAT and SLIT if provided by firmware. */
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ret = acpi_disabled ? fake_numa_init() : acpi_numa_init();
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if (ret < 0)
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return ret;
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node_possible_map = numa_nodes_parsed;
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if (WARN_ON(nodes_empty(node_possible_map)))
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return -EINVAL;
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init_node_memblock();
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if (numa_meminfo_cover_memory(&numa_meminfo) == false)
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return -EINVAL;
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for_each_node_mask(node, node_possible_map) {
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node_mem_init(node);
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node_set_online(node);
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}
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max_low_pfn = PHYS_PFN(memblock_end_of_DRAM());
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setup_nr_node_ids();
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loongson_sysconf.nr_nodes = nr_node_ids;
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loongson_sysconf.cores_per_node = cpumask_weight(&phys_cpus_on_node[0]);
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return 0;
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}
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#endif
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void __init paging_init(void)
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{
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unsigned int node;
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unsigned long zones_size[MAX_NR_ZONES] = {0, };
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for_each_online_node(node) {
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unsigned long start_pfn, end_pfn;
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get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
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if (end_pfn > max_low_pfn)
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max_low_pfn = end_pfn;
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}
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#ifdef CONFIG_ZONE_DMA32
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zones_size[ZONE_DMA32] = MAX_DMA32_PFN;
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#endif
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zones_size[ZONE_NORMAL] = max_low_pfn;
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free_area_init(zones_size);
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}
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void __init mem_init(void)
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{
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high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT);
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memblock_free_all();
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}
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int pcibus_to_node(struct pci_bus *bus)
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{
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return dev_to_node(&bus->dev);
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}
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EXPORT_SYMBOL(pcibus_to_node);
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