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// 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>
static struct pglist_data prealloc__node_data[MAX_NUMNODES];
unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES];
EXPORT_SYMBOL(__node_distances);
struct pglist_data *__node_data[MAX_NUMNODES];
EXPORT_SYMBOL(__node_data);
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);
__node_data[node] = prealloc__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);
}
}
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 */
mem_init_print_info(NULL);
}
/* 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();
}
EXPORT_SYMBOL(prom_init_numa_memory);
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