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208 lines
5.3 KiB
208 lines
5.3 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright (C) 2010 Loongson Inc. & Lemote Inc. & |
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* Institute of Computing Technology |
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* Author: Xiang Gao, [email protected] |
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* Huacai Chen, [email protected] |
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* Xiaofu Meng, Shuangshuang Zhang |
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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/highmem.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 <linux/irq.h> |
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#include <asm/bootinfo.h> |
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#include <asm/mc146818-time.h> |
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#include <asm/time.h> |
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#include <asm/wbflush.h> |
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#include <boot_param.h> |
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#include <loongson.h> |
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unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES]; |
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EXPORT_SYMBOL(__node_distances); |
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struct pglist_data *__node_data[MAX_NUMNODES]; |
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EXPORT_SYMBOL(__node_data); |
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cpumask_t __node_cpumask[MAX_NUMNODES]; |
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EXPORT_SYMBOL(__node_cpumask); |
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static void cpu_node_probe(void) |
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{ |
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int i; |
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nodes_clear(node_possible_map); |
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nodes_clear(node_online_map); |
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for (i = 0; i < loongson_sysconf.nr_nodes; i++) { |
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node_set_state(num_online_nodes(), N_POSSIBLE); |
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node_set_online(num_online_nodes()); |
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} |
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pr_info("NUMA: Discovered %d cpus on %d nodes\n", |
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loongson_sysconf.nr_cpus, num_online_nodes()); |
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} |
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static int __init compute_node_distance(int row, int col) |
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{ |
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int package_row = row * loongson_sysconf.cores_per_node / |
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loongson_sysconf.cores_per_package; |
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int package_col = col * loongson_sysconf.cores_per_node / |
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loongson_sysconf.cores_per_package; |
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if (col == row) |
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return LOCAL_DISTANCE; |
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else if (package_row == package_col) |
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return 40; |
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else |
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return 100; |
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} |
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static void __init init_topology_matrix(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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__node_distances[row][col] = -1; |
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for_each_online_node(row) { |
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for_each_online_node(col) { |
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__node_distances[row][col] = |
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compute_node_distance(row, col); |
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} |
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} |
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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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struct pglist_data *nd; |
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unsigned long node_addrspace_offset; |
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unsigned long start_pfn, end_pfn; |
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unsigned long nd_pa; |
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int tnid; |
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const size_t nd_size = roundup(sizeof(pg_data_t), SMP_CACHE_BYTES); |
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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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nd_pa = memblock_phys_alloc_try_nid(nd_size, SMP_CACHE_BYTES, node); |
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if (!nd_pa) |
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panic("Cannot allocate %zu bytes for node %d data\n", |
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nd_size, node); |
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nd = __va(nd_pa); |
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memset(nd, 0, sizeof(struct pglist_data)); |
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tnid = early_pfn_to_nid(nd_pa >> PAGE_SHIFT); |
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if (tnid != node) |
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pr_info("NODE_DATA(%d) on node %d\n", node, tnid); |
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__node_data[node] = nd; |
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NODE_DATA(node)->node_start_pfn = start_pfn; |
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NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn; |
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if (node == 0) { |
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/* kernel start address */ |
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unsigned long kernel_start_pfn = PFN_DOWN(__pa_symbol(&_text)); |
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/* kernel end address */ |
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unsigned long kernel_end_pfn = PFN_UP(__pa_symbol(&_end)); |
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/* used by finalize_initrd() */ |
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max_low_pfn = end_pfn; |
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/* Reserve the kernel text/data/bss */ |
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memblock_reserve(kernel_start_pfn << PAGE_SHIFT, |
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((kernel_end_pfn - kernel_start_pfn) << PAGE_SHIFT)); |
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/* Reserve 0xfe000000~0xffffffff for RS780E integrated GPU */ |
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if (node_end_pfn(0) >= (0xffffffff >> PAGE_SHIFT)) |
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memblock_reserve((node_addrspace_offset | 0xfe000000), |
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32 << 20); |
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/* Reserve pfn range 0~node[0]->node_start_pfn */ |
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memblock_reserve(0, PAGE_SIZE * start_pfn); |
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} |
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} |
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static __init void prom_meminit(void) |
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{ |
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unsigned int node, cpu, active_cpu = 0; |
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cpu_node_probe(); |
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init_topology_matrix(); |
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for (node = 0; node < loongson_sysconf.nr_nodes; node++) { |
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if (node_online(node)) { |
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szmem(node); |
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node_mem_init(node); |
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cpumask_clear(&__node_cpumask[node]); |
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} |
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} |
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max_low_pfn = PHYS_PFN(memblock_end_of_DRAM()); |
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for (cpu = 0; cpu < loongson_sysconf.nr_cpus; cpu++) { |
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node = cpu / loongson_sysconf.cores_per_node; |
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if (node >= num_online_nodes()) |
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node = 0; |
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if (loongson_sysconf.reserved_cpus_mask & (1<<cpu)) |
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continue; |
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cpumask_set_cpu(active_cpu, &__node_cpumask[node]); |
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pr_info("NUMA: set cpumask cpu %d on node %d\n", active_cpu, node); |
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active_cpu++; |
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} |
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} |
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void __init paging_init(void) |
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{ |
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unsigned long zones_size[MAX_NR_ZONES] = {0, }; |
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pagetable_init(); |
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zones_size[ZONE_DMA32] = MAX_DMA32_PFN; |
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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(get_num_physpages() << PAGE_SHIFT); |
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memblock_free_all(); |
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setup_zero_pages(); /* This comes from node 0 */ |
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} |
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/* All PCI device belongs to logical Node-0 */ |
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int pcibus_to_node(struct pci_bus *bus) |
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{ |
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return 0; |
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} |
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EXPORT_SYMBOL(pcibus_to_node); |
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void __init prom_init_numa_memory(void) |
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{ |
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pr_info("CP0_Config3: CP0 16.3 (0x%x)\n", read_c0_config3()); |
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pr_info("CP0_PageGrain: CP0 5.1 (0x%x)\n", read_c0_pagegrain()); |
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prom_meminit(); |
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} |
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pg_data_t * __init arch_alloc_nodedata(int nid) |
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{ |
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return memblock_alloc(sizeof(pg_data_t), SMP_CACHE_BYTES); |
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} |
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void arch_refresh_nodedata(int nid, pg_data_t *pgdat) |
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{ |
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__node_data[nid] = pgdat; |
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}
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