| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Copyright (C) 2010 Loongson Inc. & Lemote Inc. & |
| * Institute of Computing Technology |
| * Author: Xiang Gao, gaoxiang@ict.ac.cn |
| * Huacai Chen, chenhc@lemote.com |
| * Xiaofu Meng, Shuangshuang Zhang |
| */ |
| #include <linux/init.h> |
| #include <linux/kernel.h> |
| #include <linux/mm.h> |
| #include <linux/mmzone.h> |
| #include <linux/export.h> |
| #include <linux/nodemask.h> |
| #include <linux/swap.h> |
| #include <linux/memblock.h> |
| #include <linux/pfn.h> |
| #include <linux/highmem.h> |
| #include <asm/page.h> |
| #include <asm/pgalloc.h> |
| #include <asm/sections.h> |
| #include <linux/irq.h> |
| #include <asm/bootinfo.h> |
| #include <asm/mc146818-time.h> |
| #include <asm/time.h> |
| #include <asm/wbflush.h> |
| #include <boot_param.h> |
| #include <loongson.h> |
| |
| unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES]; |
| EXPORT_SYMBOL(__node_distances); |
| |
| cpumask_t __node_cpumask[MAX_NUMNODES]; |
| EXPORT_SYMBOL(__node_cpumask); |
| |
| static void cpu_node_probe(void) |
| { |
| int i; |
| |
| nodes_clear(node_possible_map); |
| nodes_clear(node_online_map); |
| for (i = 0; i < loongson_sysconf.nr_nodes; i++) { |
| node_set_state(num_online_nodes(), N_POSSIBLE); |
| node_set_online(num_online_nodes()); |
| } |
| |
| pr_info("NUMA: Discovered %d cpus on %d nodes\n", |
| loongson_sysconf.nr_cpus, num_online_nodes()); |
| } |
| |
| static int __init compute_node_distance(int row, int col) |
| { |
| int package_row = row * loongson_sysconf.cores_per_node / |
| loongson_sysconf.cores_per_package; |
| int package_col = col * loongson_sysconf.cores_per_node / |
| loongson_sysconf.cores_per_package; |
| |
| if (col == row) |
| return LOCAL_DISTANCE; |
| else if (package_row == package_col) |
| return 40; |
| else |
| return 100; |
| } |
| |
| static void __init init_topology_matrix(void) |
| { |
| int row, col; |
| |
| for (row = 0; row < MAX_NUMNODES; row++) |
| for (col = 0; col < MAX_NUMNODES; col++) |
| __node_distances[row][col] = -1; |
| |
| for_each_online_node(row) { |
| for_each_online_node(col) { |
| __node_distances[row][col] = |
| compute_node_distance(row, col); |
| } |
| } |
| } |
| |
| static void __init node_mem_init(unsigned int node) |
| { |
| unsigned long node_addrspace_offset; |
| unsigned long start_pfn, end_pfn; |
| |
| node_addrspace_offset = nid_to_addrbase(node); |
| pr_info("Node%d's addrspace_offset is 0x%lx\n", |
| node, node_addrspace_offset); |
| |
| get_pfn_range_for_nid(node, &start_pfn, &end_pfn); |
| pr_info("Node%d: start_pfn=0x%lx, end_pfn=0x%lx\n", |
| node, start_pfn, end_pfn); |
| |
| alloc_node_data(node); |
| |
| NODE_DATA(node)->node_start_pfn = start_pfn; |
| NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn; |
| |
| if (node == 0) { |
| /* kernel start address */ |
| unsigned long kernel_start_pfn = PFN_DOWN(__pa_symbol(&_text)); |
| |
| /* kernel end address */ |
| unsigned long kernel_end_pfn = PFN_UP(__pa_symbol(&_end)); |
| |
| /* used by finalize_initrd() */ |
| max_low_pfn = end_pfn; |
| |
| /* Reserve the kernel text/data/bss */ |
| memblock_reserve(kernel_start_pfn << PAGE_SHIFT, |
| ((kernel_end_pfn - kernel_start_pfn) << PAGE_SHIFT)); |
| |
| /* Reserve 0xfe000000~0xffffffff for RS780E integrated GPU */ |
| if (node_end_pfn(0) >= (0xffffffff >> PAGE_SHIFT)) |
| memblock_reserve((node_addrspace_offset | 0xfe000000), |
| 32 << 20); |
| |
| /* Reserve pfn range 0~node[0]->node_start_pfn */ |
| memblock_reserve(0, PAGE_SIZE * start_pfn); |
| /* set nid for reserved memory on node 0 */ |
| memblock_set_node(0, 1ULL << 44, &memblock.reserved, 0); |
| } |
| } |
| |
| static __init void prom_meminit(void) |
| { |
| unsigned int node, cpu, active_cpu = 0; |
| |
| cpu_node_probe(); |
| init_topology_matrix(); |
| |
| for (node = 0; node < loongson_sysconf.nr_nodes; node++) { |
| if (node_online(node)) { |
| szmem(node); |
| node_mem_init(node); |
| cpumask_clear(&__node_cpumask[node]); |
| } |
| } |
| max_low_pfn = PHYS_PFN(memblock_end_of_DRAM()); |
| |
| for (cpu = 0; cpu < loongson_sysconf.nr_cpus; cpu++) { |
| node = cpu / loongson_sysconf.cores_per_node; |
| if (node >= num_online_nodes()) |
| node = 0; |
| |
| if (loongson_sysconf.reserved_cpus_mask & (1<<cpu)) |
| continue; |
| |
| cpumask_set_cpu(active_cpu, &__node_cpumask[node]); |
| pr_info("NUMA: set cpumask cpu %d on node %d\n", active_cpu, node); |
| |
| active_cpu++; |
| } |
| } |
| |
| void __init paging_init(void) |
| { |
| unsigned long zones_size[MAX_NR_ZONES] = {0, }; |
| |
| pagetable_init(); |
| zones_size[ZONE_DMA32] = MAX_DMA32_PFN; |
| zones_size[ZONE_NORMAL] = max_low_pfn; |
| free_area_init(zones_size); |
| } |
| |
| void __init mem_init(void) |
| { |
| high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT); |
| memblock_free_all(); |
| setup_zero_pages(); /* This comes from node 0 */ |
| } |
| |
| /* All PCI device belongs to logical Node-0 */ |
| int pcibus_to_node(struct pci_bus *bus) |
| { |
| return 0; |
| } |
| EXPORT_SYMBOL(pcibus_to_node); |
| |
| void __init prom_init_numa_memory(void) |
| { |
| pr_info("CP0_Config3: CP0 16.3 (0x%x)\n", read_c0_config3()); |
| pr_info("CP0_PageGrain: CP0 5.1 (0x%x)\n", read_c0_pagegrain()); |
| prom_meminit(); |
| } |