297 lines
8.1 KiB
C
Executable file
297 lines
8.1 KiB
C
Executable file
/*
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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, gaoxiang@ict.ac.cn
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* Huacai Chen, chenhc@lemote.com
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* Xiaofu Meng, Shuangshuang Zhang
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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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/bootmem.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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static struct node_data prealloc__node_data[MAX_NUMNODES];
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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 node_data *__node_data[MAX_NUMNODES];
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EXPORT_SYMBOL(__node_data);
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static void enable_lpa(void)
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{
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unsigned long value;
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value = __read_32bit_c0_register($16, 3);
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value |= 0x00000080;
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__write_32bit_c0_register($16, 3, value);
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value = __read_32bit_c0_register($16, 3);
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pr_info("CP0_Config3: CP0 16.3 (0x%lx)\n", value);
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value = __read_32bit_c0_register($5, 1);
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value |= 0x20000000;
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__write_32bit_c0_register($5, 1, value);
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value = __read_32bit_c0_register($5, 1);
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pr_info("CP0_PageGrain: CP0 5.1 (0x%lx)\n", value);
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}
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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 0;
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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 unsigned long nid_to_addroffset(unsigned int nid)
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{
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unsigned long result;
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switch (nid) {
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case 0:
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default:
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result = NODE0_ADDRSPACE_OFFSET;
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break;
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case 1:
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result = NODE1_ADDRSPACE_OFFSET;
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break;
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case 2:
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result = NODE2_ADDRSPACE_OFFSET;
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break;
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case 3:
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result = NODE3_ADDRSPACE_OFFSET;
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break;
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}
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return result;
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}
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static void __init szmem(unsigned int node)
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{
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u32 i, mem_type;
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static unsigned long num_physpages = 0;
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u64 node_id, node_psize, start_pfn, end_pfn, mem_start, mem_size;
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/* Parse memory information and activate */
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for (i = 0; i < loongson_memmap->nr_map; i++) {
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node_id = loongson_memmap->map[i].node_id;
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if (node_id != node)
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continue;
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mem_type = loongson_memmap->map[i].mem_type;
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mem_size = loongson_memmap->map[i].mem_size;
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mem_start = loongson_memmap->map[i].mem_start;
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switch (mem_type) {
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case SYSTEM_RAM_LOW:
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start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
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node_psize = (mem_size << 20) >> PAGE_SHIFT;
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end_pfn = start_pfn + node_psize;
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num_physpages += node_psize;
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pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
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(u32)node_id, mem_type, mem_start, mem_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_pfn, end_pfn, num_physpages);
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add_memory_region((node_id << 44) + mem_start,
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(u64)mem_size << 20, BOOT_MEM_RAM);
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memblock_add_node(PFN_PHYS(start_pfn),
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PFN_PHYS(end_pfn - start_pfn), node);
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break;
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case SYSTEM_RAM_HIGH:
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start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
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node_psize = (mem_size << 20) >> PAGE_SHIFT;
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end_pfn = start_pfn + node_psize;
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num_physpages += node_psize;
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pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
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(u32)node_id, mem_type, mem_start, mem_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_pfn, end_pfn, num_physpages);
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add_memory_region((node_id << 44) + mem_start,
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(u64)mem_size << 20, BOOT_MEM_RAM);
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memblock_add_node(PFN_PHYS(start_pfn),
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PFN_PHYS(end_pfn - start_pfn), node);
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break;
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case SYSTEM_RAM_RESERVED:
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pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
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(u32)node_id, mem_type, mem_start, mem_size);
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add_memory_region((node_id << 44) + mem_start,
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(u64)mem_size << 20, BOOT_MEM_RESERVED);
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memblock_reserve(((node_id << 44) + mem_start),
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mem_size << 20);
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break;
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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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unsigned long bootmap_size;
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unsigned long node_addrspace_offset;
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unsigned long start_pfn, end_pfn, freepfn;
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node_addrspace_offset = nid_to_addroffset(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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freepfn = start_pfn;
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if (node == 0)
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freepfn = PFN_UP(__pa_symbol(&_end)); /* kernel end address */
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pr_info("Node%d: start_pfn=0x%lx, end_pfn=0x%lx, freepfn=0x%lx\n",
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node, start_pfn, end_pfn, freepfn);
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__node_data[node] = prealloc__node_data + node;
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NODE_DATA(node)->bdata = &bootmem_node_data[node];
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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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bootmap_size = init_bootmem_node(NODE_DATA(node), freepfn,
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start_pfn, end_pfn);
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free_bootmem_with_active_regions(node, end_pfn);
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if (node == 0) /* used by finalize_initrd() */
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max_low_pfn = end_pfn;
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/* This is reserved for the kernel and bdata->node_bootmem_map */
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reserve_bootmem_node(NODE_DATA(node), start_pfn << PAGE_SHIFT,
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((freepfn - start_pfn) << PAGE_SHIFT) + bootmap_size,
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BOOTMEM_DEFAULT);
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if (node == 0 && node_end_pfn(0) >= (0xffffffff >> PAGE_SHIFT)) {
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/* Reserve 0xfe000000~0xffffffff for RS780E integrated GPU */
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reserve_bootmem_node(NODE_DATA(node),
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(node_addrspace_offset | 0xfe000000),
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32 << 20, BOOTMEM_DEFAULT);
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}
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sparse_memory_present_with_active_regions(node);
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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_data[(node)]->cpumask);
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}
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}
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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_data[(node)]->cpumask);
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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 node;
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unsigned long zones_size[MAX_NR_ZONES] = {0, };
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pagetable_init();
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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_nodes(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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free_all_bootmem();
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setup_zero_pages(); /* This comes from node 0 */
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mem_init_print_info(NULL);
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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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enable_lpa();
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prom_meminit();
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}
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EXPORT_SYMBOL(prom_init_numa_memory);
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