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
136
137
138
139
140
141
142
143
144
145
146
147
|
/*
* 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) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
* Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/smp.h>
#include <linux/mm.h>
#include <linux/export.h>
#include <linux/cpumask.h>
#include <asm/bootinfo.h>
#include <asm/cpu.h>
#include <asm/io.h>
#include <asm/sgialib.h>
#include <asm/time.h>
#include <asm/sn/agent.h>
#include <asm/sn/types.h>
#include <asm/sn/klconfig.h>
#include <asm/sn/ioc3.h>
#include <asm/mipsregs.h>
#include <asm/sn/gda.h>
#include <asm/sn/intr.h>
#include <asm/current.h>
#include <asm/processor.h>
#include <asm/mmu_context.h>
#include <asm/thread_info.h>
#include <asm/sn/launch.h>
#include <asm/sn/mapped_kernel.h>
#include "ip27-common.h"
#define CPU_NONE (cpuid_t)-1
static DECLARE_BITMAP(hub_init_mask, MAX_NUMNODES);
nasid_t master_nasid = INVALID_NASID;
struct cpuinfo_ip27 sn_cpu_info[NR_CPUS];
EXPORT_SYMBOL_GPL(sn_cpu_info);
static void per_hub_init(nasid_t nasid)
{
struct hub_data *hub = hub_data(nasid);
cpumask_set_cpu(smp_processor_id(), &hub->h_cpus);
if (test_and_set_bit(nasid, hub_init_mask))
return;
/*
* Set CRB timeout at 5ms, (< PI timeout of 10ms)
*/
REMOTE_HUB_S(nasid, IIO_ICTP, 0x800);
REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);
hub_rtc_init(nasid);
if (nasid) {
/* copy exception handlers from first node to current node */
memcpy((void *)NODE_OFFSET_TO_K0(nasid, 0),
(void *)CKSEG0, 0x200);
__flush_cache_all();
/* switch to node local exception handlers */
REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_8K);
}
}
void per_cpu_init(void)
{
int cpu = smp_processor_id();
nasid_t nasid = get_nasid();
clear_c0_status(ST0_IM);
per_hub_init(nasid);
pr_info("CPU %d clock is %dMHz.\n", cpu, sn_cpu_info[cpu].p_speed);
install_ipi();
/* Install our NMI handler if symmon hasn't installed one. */
install_cpu_nmi_handler(cputoslice(cpu));
enable_percpu_irq(IP27_HUB_PEND0_IRQ, IRQ_TYPE_NONE);
enable_percpu_irq(IP27_HUB_PEND1_IRQ, IRQ_TYPE_NONE);
}
void __init plat_mem_setup(void)
{
u64 p, e, n_mode;
nasid_t nid;
register_smp_ops(&ip27_smp_ops);
ip27_reboot_setup();
/*
* hub_rtc init and cpu clock intr enabled for later calibrate_delay.
*/
nid = get_nasid();
printk("IP27: Running on node %d.\n", nid);
p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1;
e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1;
printk("Node %d has %s primary CPU%s.\n", nid,
p ? "a" : "no",
e ? ", CPU is running" : "");
p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1;
e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1;
printk("Node %d has %s secondary CPU%s.\n", nid,
p ? "a" : "no",
e ? ", CPU is running" : "");
/*
* Try to catch kernel missconfigurations and give user an
* indication what option to select.
*/
n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK;
printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M');
#ifdef CONFIG_SGI_SN_N_MODE
if (!n_mode)
panic("Kernel compiled for M mode.");
#else
if (n_mode)
panic("Kernel compiled for N mode.");
#endif
ioport_resource.start = 0;
ioport_resource.end = ~0UL;
set_io_port_base(IO_BASE);
}
const char *get_system_type(void)
{
return "SGI Origin";
}
void __init prom_init(void)
{
prom_init_cmdline(fw_arg0, (LONG *)fw_arg1);
prom_meminit();
}
|
