summaryrefslogtreecommitdiff
path: root/arch/mips/sgi-ip27/ip27-init.c
blob: 8fd3505e2b9c25d613e68566fae16be6bc5d7535 (plain)
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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
/*
 * 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/pgtable.h>
#include <asm/sgialib.h>
#include <asm/time.h>
#include <asm/sn/types.h>
#include <asm/sn/sn0/addrs.h>
#include <asm/sn/sn0/hubni.h>
#include <asm/sn/sn0/hubio.h>
#include <asm/sn/klconfig.h>
#include <asm/sn/ioc3.h>
#include <asm/mipsregs.h>
#include <asm/sn/gda.h>
#include <asm/sn/hub.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/sn_private.h>
#include <asm/sn/sn0/ip27.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);

#ifdef CONFIG_REPLICATE_EXHANDLERS
	/*
	 * If this is not a headless node initialization,
	 * copy over the caliased exception handlers.
	 */
	if (get_nasid() == nasid) {
		extern char except_vec2_generic, except_vec3_generic;
		extern void build_tlb_refill_handler(void);

		memcpy((void *)(CKSEG0 + 0x100), &except_vec2_generic, 0x80);
		memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x80);
		build_tlb_refill_handler();
		memcpy((void *)(CKSEG0 + 0x100), (void *) CKSEG0, 0x80);
		memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x100);
		__flush_cache_all();
	}
#endif
}

void per_cpu_init(void)
{
	int cpu = smp_processor_id();
	int slice = LOCAL_HUB_L(PI_CPU_NUM);
	nasid_t nasid = get_nasid();
	struct hub_data *hub = hub_data(nasid);

	if (test_and_set_bit(slice, &hub->slice_map))
		return;

	clear_c0_status(ST0_IM);

	per_hub_init(nasid);

	cpu_time_init();
	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);
}

/*
 * get_nasid() returns the physical node id number of the caller.
 */
nasid_t
get_nasid(void)
{
	return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK)
			 >> NSRI_NODEID_SHFT);
}

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();
}