Commit 0b25921e authored by Anton Blanchard's avatar Anton Blanchard

ppc64: DISCONTIGMEM updates

parent 6de920eb
......@@ -12,5 +12,6 @@ EXTRA_CFLAGS = -mno-minimal-toc
O_TARGET := mm.o
obj-y := fault.o init.o extable.o imalloc.o
obj-$(CONFIG_DISCONTIGMEM) += numa.o
include $(TOPDIR)/Rules.make
/*
* NUMA support
*
* Copyright (C) 2002 Anton Blanchard <anton@au.ibm.com>, IBM
*
* 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/threads.h>
#include <linux/bootmem.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/mmzone.h>
#include <asm/lmb.h>
#if 0
#define dbg(format, arg...) udbg_printf(format, arg)
#else
#define dbg(format, arg...)
#endif
int numa_cpu_lookup_table[NR_CPUS] = { [ 0 ... (NR_CPUS - 1)] = -1};
int numa_memory_lookup_table[MAX_MEMORY >> MEMORY_INCREMENT_SHIFT] =
{ [ 0 ... ((MAX_MEMORY >> MEMORY_INCREMENT_SHIFT) - 1)] = -1};
int numa_node_exists[MAX_NUMNODES];
struct pglist_data node_data[MAX_NUMNODES];
bootmem_data_t plat_node_bdata[MAX_NUMNODES];
static int __init parse_numa_properties(void)
{
/* XXX implement */
return -1;
}
void __init do_init_bootmem(void)
{
int nid;
min_low_pfn = 0;
max_low_pfn = lmb_end_of_DRAM() >> PAGE_SHIFT;
if (parse_numa_properties())
BUG();
for (nid = 0; nid < MAX_NUMNODES; nid++) {
unsigned long start, end;
unsigned long start_paddr, end_paddr;
int i;
unsigned long bootmem_paddr;
unsigned long bootmap_size;
if (!numa_node_exists[nid])
continue;
/* Find start and end of this zone */
start = 0;
while (numa_memory_lookup_table[start] != nid)
start++;
end = (MAX_MEMORY >> MEMORY_INCREMENT_SHIFT) - 1;
while (numa_memory_lookup_table[end] != nid)
end--;
end++;
start_paddr = start << MEMORY_INCREMENT_SHIFT;
end_paddr = end << MEMORY_INCREMENT_SHIFT;
dbg("node %d\n", nid);
dbg("start_paddr = %lx\n", start_paddr);
dbg("end_paddr = %lx\n", end_paddr);
NODE_DATA(nid)->bdata = &plat_node_bdata[nid];
/* XXX FIXME: first bitmap hardwired to 1G */
if (start_paddr == 0)
bootmem_paddr = (1 << 30);
else
bootmem_paddr = start_paddr;
dbg("bootmap_paddr = %lx\n", bootmem_paddr);
bootmap_size = init_bootmem_node(NODE_DATA(nid),
bootmem_paddr >> PAGE_SHIFT,
start_paddr >> PAGE_SHIFT,
end_paddr >> PAGE_SHIFT);
dbg("bootmap_size = %lx\n", bootmap_size);
for (i = 0; i < lmb.memory.cnt; i++) {
unsigned long physbase, size;
unsigned long type = lmb.memory.region[i].type;
if (type != LMB_MEMORY_AREA)
continue;
physbase = lmb.memory.region[i].physbase;
size = lmb.memory.region[i].size;
if (physbase < end_paddr &&
(physbase+size) > start_paddr) {
/* overlaps */
if (physbase < start_paddr) {
size -= start_paddr - physbase;
physbase = start_paddr;
}
if (size > end_paddr - start_paddr)
size = end_paddr - start_paddr;
dbg("free_bootmem %lx %lx\n", physbase, size);
free_bootmem_node(NODE_DATA(nid), physbase,
size);
}
}
for (i = 0; i < lmb.reserved.cnt; i++) {
unsigned long physbase = lmb.reserved.region[i].physbase;
unsigned long size = lmb.reserved.region[i].size;
if (physbase < end_paddr &&
(physbase+size) > start_paddr) {
/* overlaps */
if (physbase < start_paddr) {
size -= start_paddr - physbase;
physbase = start_paddr;
}
if (size > end_paddr - start_paddr)
size = end_paddr - start_paddr;
dbg("reserve_bootmem %lx %lx\n", physbase,
size);
reserve_bootmem_node(NODE_DATA(nid), physbase,
size);
}
}
dbg("reserve_bootmem %lx %lx\n", bootmem_paddr, bootmap_size);
reserve_bootmem_node(NODE_DATA(nid), bootmem_paddr,
bootmap_size);
}
}
void __init paging_init(void)
{
unsigned long zones_size[MAX_NR_ZONES];
int i, nid;
for (i = 1; i < MAX_NR_ZONES; i++)
zones_size[i] = 0;
for (nid = 0; nid < MAX_NUMNODES; nid++) {
unsigned long start_pfn;
unsigned long end_pfn;
if (!numa_node_exists[nid])
continue;
start_pfn = plat_node_bdata[nid].node_boot_start >> PAGE_SHIFT;
end_pfn = plat_node_bdata[nid].node_low_pfn;
zones_size[ZONE_DMA] = end_pfn - start_pfn;
dbg("free_area_init node %d %lx %lx\n", nid, zones_size,
start_pfn);
free_area_init_node(nid, NODE_DATA(nid), NULL, zones_size,
start_pfn, NULL);
}
}
......@@ -11,7 +11,7 @@
#ifdef CONFIG_DISCONTIGMEM
extern struct pglist_data *node_data[];
extern struct pglist_data node_data[];
/*
* Following are specific to this numa platform.
......@@ -27,7 +27,7 @@ extern int numa_memory_lookup_table[];
#define MEMORY_INCREMENT_SHIFT 28
#define MEMORY_INCREMENT (1UL << MEMORY_INCREMENT_SHIFT)
#undef DEBUG_NUMA
#define DEBUG_NUMA
static inline int pa_to_nid(unsigned long pa)
{
......@@ -48,9 +48,14 @@ static inline int pa_to_nid(unsigned long pa)
#define pfn_to_nid(pfn) pa_to_nid((pfn) << PAGE_SHIFT)
#define node_startnr(nid) (node_data[nid]->node_start_mapnr)
#define node_size(nid) (node_data[nid]->node_size)
#define node_localnr(pfn, nid) ((pfn) - node_data[nid]->node_start_pfn)
/*
* Return a pointer to the node data for node n.
*/
#define NODE_DATA(nid) (&node_data[nid])
#define node_startnr(nid) (NODE_DATA(nid)->node_start_mapnr)
#define node_size(nid) (NODE_DATA(nid)->node_size)
#define node_localnr(pfn, nid) ((pfn) - NODE_DATA(nid)->node_start_pfn)
#ifdef CONFIG_NUMA
......@@ -80,11 +85,6 @@ static inline int __cpu_to_node(int cpu)
*/
#define kvaddr_to_nid(kaddr) pa_to_nid(__pa(kaddr))
/*
* Return a pointer to the node data for node n.
*/
#define NODE_DATA(nid) (node_data[nid])
#define node_mem_map(nid) (NODE_DATA(nid)->node_mem_map)
#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
......
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