1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
/*
* Ported from IRIX to Linux by Kanoj Sarcar, 06/08/00.
* Copyright 2000 - 2001 Silicon Graphics, Inc.
* Copyright 2000 - 2001 Kanoj Sarcar (kanoj@sgi.com)
*/
#include <linux/config.h>
#include <linux/init.h>
#include <linux/mmzone.h>
#include <linux/kernel.h>
#include <linux/nodemask.h>
#include <linux/string.h>
#include <asm/page.h>
#include <asm/sections.h>
#include <asm/smp.h>
#include <asm/sn/types.h>
#include <asm/sn/arch.h>
#include <asm/sn/gda.h>
#include <asm/sn/hub.h>
#include <asm/sn/mapped_kernel.h>
#include <asm/sn/sn_private.h>
static cpumask_t ktext_repmask;
/*
* XXX - This needs to be much smarter about where it puts copies of the
* kernel. For example, we should never put a copy on a headless node,
* and we should respect the topology of the machine.
*/
void __init setup_replication_mask()
{
cnodeid_t cnode;
/* Set only the master cnode's bit. The master cnode is always 0. */
cpus_clear(ktext_repmask);
cpu_set(0, ktext_repmask);
#ifdef CONFIG_REPLICATE_KTEXT
#ifndef CONFIG_MAPPED_KERNEL
#error Kernel replication works with mapped kernel support. No calias support.
#endif
for_each_online_node(cnode) {
if (cnode == 0)
continue;
/* Advertise that we have a copy of the kernel */
cpu_set(cnode, ktext_repmask);
}
#endif
/* Set up a GDA pointer to the replication mask. */
GDA->g_ktext_repmask = &ktext_repmask;
}
static __init void set_ktext_source(nasid_t client_nasid, nasid_t server_nasid)
{
cnodeid_t client_cnode;
kern_vars_t *kvp;
client_cnode = NASID_TO_COMPACT_NODEID(client_nasid);
kvp = &hub_data(client_nasid)->kern_vars;
KERN_VARS_ADDR(client_nasid) = (unsigned long)kvp;
kvp->kv_magic = KV_MAGIC;
kvp->kv_ro_nasid = server_nasid;
kvp->kv_rw_nasid = master_nasid;
kvp->kv_ro_baseaddr = NODE_CAC_BASE(server_nasid);
kvp->kv_rw_baseaddr = NODE_CAC_BASE(master_nasid);
printk("REPLICATION: ON nasid %d, ktext from nasid %d, kdata from nasid %d\n", client_nasid, server_nasid, master_nasid);
}
/* XXX - When the BTE works, we should use it instead of this. */
static __init void copy_kernel(nasid_t dest_nasid)
{
unsigned long dest_kern_start, source_start, source_end, kern_size;
source_start = (unsigned long) _stext;
source_end = (unsigned long) _etext;
kern_size = source_end - source_start;
dest_kern_start = CHANGE_ADDR_NASID(MAPPED_KERN_RO_TO_K0(source_start),
dest_nasid);
memcpy((void *)dest_kern_start, (void *)source_start, kern_size);
}
void __init replicate_kernel_text()
{
cnodeid_t cnode;
nasid_t client_nasid;
nasid_t server_nasid;
server_nasid = master_nasid;
/* Record where the master node should get its kernel text */
set_ktext_source(master_nasid, master_nasid);
for_each_online_node(cnode) {
if (cnode == 0)
continue;
client_nasid = COMPACT_TO_NASID_NODEID(cnode);
/* Check if this node should get a copy of the kernel */
if (cpu_isset(cnode, ktext_repmask)) {
server_nasid = client_nasid;
copy_kernel(server_nasid);
}
/* Record where this node should get its kernel text */
set_ktext_source(client_nasid, server_nasid);
}
}
/*
* Return pfn of first free page of memory on a node. PROM may allocate
* data structures on the first couple of pages of the first slot of each
* node. If this is the case, getfirstfree(node) > getslotstart(node, 0).
*/
pfn_t node_getfirstfree(cnodeid_t cnode)
{
unsigned long loadbase = REP_BASE;
nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);
unsigned long offset;
#ifdef CONFIG_MAPPED_KERNEL
loadbase += 16777216;
#endif
offset = PAGE_ALIGN((unsigned long)(&_end)) - loadbase;
if ((cnode == 0) || (cpu_isset(cnode, ktext_repmask)))
return (TO_NODE(nasid, offset) >> PAGE_SHIFT);
else
return (KDM_TO_PHYS(PAGE_ALIGN(SYMMON_STK_ADDR(nasid, 0))) >>
PAGE_SHIFT);
}
|
