MIPS: Add NUMA support for Loongson-3

Multiple Loongson-3A chips can be interconnected with HT0-bus. This is
a CC-NUMA system that every chip (node) has its own local memory and
cache coherency is maintained by hardware. The 64-bit physical memory
address format is as follows:

0x-0000-YZZZ-ZZZZ-ZZZZ

The high 16 bits should be 0, which means the real physical address
supported by Loongson-3 is 48-bit. The "Y" bits is the base address of
each node, which can be also considered as the node-id. The "Z" bits is
the address offset within a node, which means every node has a 44 bits
address space.

Macros XPHYSADDR and MAX_PHYSMEM_BITS are modified unconditionally,
because many other MIPS CPUs have also extended their address spaces.

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: John Crispin <john@phrozen.org>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/7187/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Huacai Chen 2014-06-26 11:41:28 +08:00 committed by Ralf Baechle
parent 140e39c1e3
commit c461731836
13 changed files with 445 additions and 5 deletions

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@ -52,7 +52,7 @@
*/
#define CPHYSADDR(a) ((_ACAST32_(a)) & 0x1fffffff)
#define XPHYSADDR(a) ((_ACAST64_(a)) & \
_CONST64_(0x000000ffffffffff))
_CONST64_(0x0000ffffffffffff))
#ifdef CONFIG_64BIT

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@ -146,6 +146,9 @@ struct boot_params {
struct loongson_system_configuration {
u32 nr_cpus;
u32 nr_nodes;
int cores_per_node;
int cores_per_package;
enum loongson_cpu_type cputype;
u64 ht_control_base;
u64 pci_mem_start_addr;

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@ -0,0 +1,52 @@
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2005 Embedded Alley Solutions, Inc
* Copyright (C) 2005 Ralf Baechle (ralf@linux-mips.org)
* Copyright (C) 2009 Jiajie Chen (chenjiajie@cse.buaa.edu.cn)
* Copyright (C) 2012 Huacai Chen (chenhc@lemote.com)
*/
#ifndef __ASM_MACH_LOONGSON_KERNEL_ENTRY_H
#define __ASM_MACH_LOONGSON_KERNEL_ENTRY_H
/*
* Override macros used in arch/mips/kernel/head.S.
*/
.macro kernel_entry_setup
#ifdef CONFIG_CPU_LOONGSON3
.set push
.set mips64
/* Set LPA on LOONGSON3 config3 */
mfc0 t0, $16, 3
or t0, (0x1 << 7)
mtc0 t0, $16, 3
/* Set ELPA on LOONGSON3 pagegrain */
li t0, (0x1 << 29)
mtc0 t0, $5, 1
_ehb
.set pop
#endif
.endm
/*
* Do SMP slave processor setup.
*/
.macro smp_slave_setup
#ifdef CONFIG_CPU_LOONGSON3
.set push
.set mips64
/* Set LPA on LOONGSON3 config3 */
mfc0 t0, $16, 3
or t0, (0x1 << 7)
mtc0 t0, $16, 3
/* Set ELPA on LOONGSON3 pagegrain */
li t0, (0x1 << 29)
mtc0 t0, $5, 1
_ehb
.set pop
#endif
.endm
#endif /* __ASM_MACH_LOONGSON_KERNEL_ENTRY_H */

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@ -0,0 +1,53 @@
/*
* Copyright (C) 2010 Loongson Inc. & Lemote Inc. &
* Insititute of Computing Technology
* Author: Xiang Gao, gaoxiang@ict.ac.cn
* Huacai Chen, chenhc@lemote.com
* Xiaofu Meng, Shuangshuang Zhang
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#ifndef _ASM_MACH_MMZONE_H
#define _ASM_MACH_MMZONE_H
#include <boot_param.h>
#define NODE_ADDRSPACE_SHIFT 44
#define NODE0_ADDRSPACE_OFFSET 0x000000000000UL
#define NODE1_ADDRSPACE_OFFSET 0x100000000000UL
#define NODE2_ADDRSPACE_OFFSET 0x200000000000UL
#define NODE3_ADDRSPACE_OFFSET 0x300000000000UL
#define pa_to_nid(addr) (((addr) & 0xf00000000000) >> NODE_ADDRSPACE_SHIFT)
#define LEVELS_PER_SLICE 128
struct slice_data {
unsigned long irq_enable_mask[2];
int level_to_irq[LEVELS_PER_SLICE];
};
struct hub_data {
cpumask_t h_cpus;
unsigned long slice_map;
unsigned long irq_alloc_mask[2];
struct slice_data slice[2];
};
struct node_data {
struct pglist_data pglist;
struct hub_data hub;
cpumask_t cpumask;
};
extern struct node_data *__node_data[];
#define NODE_DATA(n) (&__node_data[(n)]->pglist)
#define hub_data(n) (&__node_data[(n)]->hub)
extern void setup_zero_pages(void);
extern void __init prom_init_numa_memory(void);
#endif /* _ASM_MACH_MMZONE_H */

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@ -0,0 +1,23 @@
#ifndef _ASM_MACH_TOPOLOGY_H
#define _ASM_MACH_TOPOLOGY_H
#ifdef CONFIG_NUMA
#define cpu_to_node(cpu) ((cpu) >> 2)
#define parent_node(node) (node)
#define cpumask_of_node(node) (&__node_data[(node)]->cpumask)
struct pci_bus;
extern int pcibus_to_node(struct pci_bus *);
#define cpumask_of_pcibus(bus) (cpu_online_mask)
extern unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES];
#define node_distance(from, to) (__node_distances[(from)][(to)])
#endif
#include <asm-generic/topology.h>
#endif /* _ASM_MACH_TOPOLOGY_H */

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@ -11,7 +11,7 @@
#else
# define SECTION_SIZE_BITS 28
#endif
#define MAX_PHYSMEM_BITS 35
#define MAX_PHYSMEM_BITS 48
#endif /* CONFIG_SPARSEMEM */
#endif /* _MIPS_SPARSEMEM_H */

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@ -282,7 +282,7 @@ static unsigned long __init init_initrd(void)
* Initialize the bootmem allocator. It also setup initrd related data
* if needed.
*/
#ifdef CONFIG_SGI_IP27
#if defined(CONFIG_SGI_IP27) || (defined(CONFIG_CPU_LOONGSON3) && defined(CONFIG_NUMA))
static void __init bootmem_init(void)
{

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@ -79,6 +79,7 @@ config LEMOTE_MACH3A
select SYS_HAS_EARLY_PRINTK
select SYS_SUPPORTS_SMP
select SYS_SUPPORTS_HOTPLUG_CPU
select SYS_SUPPORTS_NUMA
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_HIGHMEM
select SYS_SUPPORTS_LITTLE_ENDIAN

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@ -80,17 +80,24 @@ void __init prom_init_env(void)
cpu_clock_freq = ecpu->cpu_clock_freq;
loongson_sysconf.cputype = ecpu->cputype;
if (ecpu->cputype == Loongson_3A) {
loongson_sysconf.cores_per_node = 4;
loongson_sysconf.cores_per_package = 4;
loongson_chipcfg[0] = 0x900000001fe00180;
loongson_chipcfg[1] = 0x900010001fe00180;
loongson_chipcfg[2] = 0x900020001fe00180;
loongson_chipcfg[3] = 0x900030001fe00180;
} else {
loongson_sysconf.cores_per_node = 1;
loongson_sysconf.cores_per_package = 1;
loongson_chipcfg[0] = 0x900000001fe00180;
}
loongson_sysconf.nr_cpus = ecpu->nr_cpus;
if (ecpu->nr_cpus > NR_CPUS || ecpu->nr_cpus == 0)
loongson_sysconf.nr_cpus = NR_CPUS;
loongson_sysconf.nr_nodes = (loongson_sysconf.nr_cpus +
loongson_sysconf.cores_per_node - 1) /
loongson_sysconf.cores_per_node;
loongson_sysconf.pci_mem_start_addr = eirq_source->pci_mem_start_addr;
loongson_sysconf.pci_mem_end_addr = eirq_source->pci_mem_end_addr;

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@ -30,7 +30,11 @@ void __init prom_init(void)
set_io_port_base((unsigned long)
ioremap(LOONGSON_PCIIO_BASE, LOONGSON_PCIIO_SIZE));
#ifdef CONFIG_NUMA
prom_init_numa_memory();
#else
prom_init_memory();
#endif
/*init the uart base address */
prom_init_uart_base();

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@ -4,3 +4,5 @@
obj-y += irq.o
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_NUMA) += numa.o

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@ -0,0 +1,291 @@
/*
* Copyright (C) 2010 Loongson Inc. & Lemote Inc. &
* Insititute of Computing Technology
* Author: Xiang Gao, gaoxiang@ict.ac.cn
* Huacai Chen, chenhc@lemote.com
* Xiaofu Meng, Shuangshuang Zhang
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/mmzone.h>
#include <linux/module.h>
#include <linux/nodemask.h>
#include <linux/swap.h>
#include <linux/memblock.h>
#include <linux/bootmem.h>
#include <linux/pfn.h>
#include <linux/highmem.h>
#include <asm/page.h>
#include <asm/pgalloc.h>
#include <asm/sections.h>
#include <linux/bootmem.h>
#include <linux/init.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>
static struct node_data prealloc__node_data[MAX_NUMNODES];
unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES];
struct node_data *__node_data[MAX_NUMNODES];
EXPORT_SYMBOL(__node_data);
static void enable_lpa(void)
{
unsigned long value;
value = __read_32bit_c0_register($16, 3);
value |= 0x00000080;
__write_32bit_c0_register($16, 3, value);
value = __read_32bit_c0_register($16, 3);
pr_info("CP0_Config3: CP0 16.3 (0x%lx)\n", value);
value = __read_32bit_c0_register($5, 1);
value |= 0x20000000;
__write_32bit_c0_register($5, 1, value);
value = __read_32bit_c0_register($5, 1);
pr_info("CP0_PageGrain: CP0 5.1 (0x%lx)\n", value);
}
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 0;
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 unsigned long nid_to_addroffset(unsigned int nid)
{
unsigned long result;
switch (nid) {
case 0:
default:
result = NODE0_ADDRSPACE_OFFSET;
break;
case 1:
result = NODE1_ADDRSPACE_OFFSET;
break;
case 2:
result = NODE2_ADDRSPACE_OFFSET;
break;
case 3:
result = NODE3_ADDRSPACE_OFFSET;
break;
}
return result;
}
static void __init szmem(unsigned int node)
{
u32 i, mem_type;
static unsigned long num_physpages = 0;
u64 node_id, node_psize, start_pfn, end_pfn, mem_start, mem_size;
/* Parse memory information and activate */
for (i = 0; i < loongson_memmap->nr_map; i++) {
node_id = loongson_memmap->map[i].node_id;
if (node_id != node)
continue;
mem_type = loongson_memmap->map[i].mem_type;
mem_size = loongson_memmap->map[i].mem_size;
mem_start = loongson_memmap->map[i].mem_start;
switch (mem_type) {
case SYSTEM_RAM_LOW:
start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
node_psize = (mem_size << 20) >> PAGE_SHIFT;
end_pfn = start_pfn + node_psize;
num_physpages += node_psize;
pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
(u32)node_id, mem_type, mem_start, mem_size);
pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
start_pfn, end_pfn, num_physpages);
add_memory_region((node_id << 44) + mem_start,
(u64)mem_size << 20, BOOT_MEM_RAM);
memblock_add_node(PFN_PHYS(start_pfn),
PFN_PHYS(end_pfn - start_pfn), node);
break;
case SYSTEM_RAM_HIGH:
start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
node_psize = (mem_size << 20) >> PAGE_SHIFT;
end_pfn = start_pfn + node_psize;
num_physpages += node_psize;
pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
(u32)node_id, mem_type, mem_start, mem_size);
pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
start_pfn, end_pfn, num_physpages);
add_memory_region((node_id << 44) + mem_start,
(u64)mem_size << 20, BOOT_MEM_RAM);
memblock_add_node(PFN_PHYS(start_pfn),
PFN_PHYS(end_pfn - start_pfn), node);
break;
case MEM_RESERVED:
pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
(u32)node_id, mem_type, mem_start, mem_size);
add_memory_region((node_id << 44) + mem_start,
(u64)mem_size << 20, BOOT_MEM_RESERVED);
memblock_reserve(((node_id << 44) + mem_start),
mem_size << 20);
break;
}
}
}
static void __init node_mem_init(unsigned int node)
{
unsigned long bootmap_size;
unsigned long node_addrspace_offset;
unsigned long start_pfn, end_pfn, freepfn;
node_addrspace_offset = nid_to_addroffset(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);
freepfn = start_pfn;
if (node == 0)
freepfn = PFN_UP(__pa_symbol(&_end)); /* kernel end address */
pr_info("Node%d: start_pfn=0x%lx, end_pfn=0x%lx, freepfn=0x%lx\n",
node, start_pfn, end_pfn, freepfn);
__node_data[node] = prealloc__node_data + node;
NODE_DATA(node)->bdata = &bootmem_node_data[node];
NODE_DATA(node)->node_start_pfn = start_pfn;
NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;
bootmap_size = init_bootmem_node(NODE_DATA(node), freepfn,
start_pfn, end_pfn);
free_bootmem_with_active_regions(node, end_pfn);
if (node == 0) /* used by finalize_initrd() */
max_low_pfn = end_pfn;
/* This is reserved for the kernel and bdata->node_bootmem_map */
reserve_bootmem_node(NODE_DATA(node), start_pfn << PAGE_SHIFT,
((freepfn - start_pfn) << PAGE_SHIFT) + bootmap_size,
BOOTMEM_DEFAULT);
if (node == 0 && node_end_pfn(0) >= (0xffffffff >> PAGE_SHIFT)) {
/* Reserve 0xff800000~0xffffffff for RS780E integrated GPU */
reserve_bootmem_node(NODE_DATA(node),
(node_addrspace_offset | 0xff800000),
8 << 20, BOOTMEM_DEFAULT);
}
sparse_memory_present_with_active_regions(node);
}
static __init void prom_meminit(void)
{
unsigned int node, cpu;
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);
cpus_clear(__node_data[(node)]->cpumask);
}
}
for (cpu = 0; cpu < loongson_sysconf.nr_cpus; cpu++) {
node = cpu / loongson_sysconf.cores_per_node;
if (node >= num_online_nodes())
node = 0;
pr_info("NUMA: set cpumask cpu %d on node %d\n", cpu, node);
cpu_set(cpu, __node_data[(node)]->cpumask);
}
}
void __init paging_init(void)
{
unsigned node;
unsigned long zones_size[MAX_NR_ZONES] = {0, };
pagetable_init();
for_each_online_node(node) {
unsigned long start_pfn, end_pfn;
get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
if (end_pfn > max_low_pfn)
max_low_pfn = end_pfn;
}
#ifdef CONFIG_ZONE_DMA32
zones_size[ZONE_DMA32] = MAX_DMA32_PFN;
#endif
zones_size[ZONE_NORMAL] = max_low_pfn;
free_area_init_nodes(zones_size);
}
void __init mem_init(void)
{
high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT);
free_all_bootmem();
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)
{
enable_lpa();
prom_meminit();
}
EXPORT_SYMBOL(prom_init_numa_memory);

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@ -203,6 +203,8 @@ static void loongson3_init_secondary(void)
for (i = 0; i < loongson_sysconf.nr_cpus; i++)
loongson3_ipi_write32(0xffffffff, ipi_en0_regs[i]);
cpu_data[cpu].package = cpu / loongson_sysconf.cores_per_package;
cpu_data[cpu].core = cpu % loongson_sysconf.cores_per_package;
per_cpu(cpu_state, cpu) = CPU_ONLINE;
i = 0;
@ -394,17 +396,19 @@ static int loongson3_cpu_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
uint64_t core_id = cpu_data[cpu].core;
uint64_t package_id = cpu_data[cpu].package;
switch (action) {
case CPU_POST_DEAD:
case CPU_POST_DEAD_FROZEN:
pr_info("Disable clock for CPU#%d\n", cpu);
LOONGSON_CHIPCFG(0) &= ~(1 << (12 + cpu));
LOONGSON_CHIPCFG(package_id) &= ~(1 << (12 + core_id));
break;
case CPU_UP_PREPARE:
case CPU_UP_PREPARE_FROZEN:
pr_info("Enable clock for CPU#%d\n", cpu);
LOONGSON_CHIPCFG(0) |= 1 << (12 + cpu);
LOONGSON_CHIPCFG(package_id) |= 1 << (12 + core_id);
break;
}