1 /*
2 * This file is subject to the terms and conditions of the GNU General
3 * Public License. See the file "COPYING" in the main directory of this
4 * archive for more details.
5 *
6 * Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
7 * Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
8 */
9 #include <linux/kernel.h>
10 #include <linux/init.h>
11 #include <linux/sched.h>
12 #include <linux/smp.h>
13 #include <linux/mm.h>
14 #include <linux/export.h>
15 #include <linux/cpumask.h>
16 #include <asm/cpu.h>
17 #include <asm/io.h>
18 #include <asm/pgtable.h>
19 #include <asm/time.h>
20 #include <asm/sn/types.h>
21 #include <asm/sn/sn0/addrs.h>
22 #include <asm/sn/sn0/hubni.h>
23 #include <asm/sn/sn0/hubio.h>
24 #include <asm/sn/klconfig.h>
25 #include <asm/sn/ioc3.h>
26 #include <asm/mipsregs.h>
27 #include <asm/sn/gda.h>
28 #include <asm/sn/hub.h>
29 #include <asm/sn/intr.h>
30 #include <asm/current.h>
31 #include <asm/processor.h>
32 #include <asm/mmu_context.h>
33 #include <asm/thread_info.h>
34 #include <asm/sn/launch.h>
35 #include <asm/sn/sn_private.h>
36 #include <asm/sn/sn0/ip27.h>
37 #include <asm/sn/mapped_kernel.h>
38
39 #define CPU_NONE (cpuid_t)-1
40
41 static DECLARE_BITMAP(hub_init_mask, MAX_COMPACT_NODES);
42 nasid_t master_nasid = INVALID_NASID;
43
44 cnodeid_t nasid_to_compact_node[MAX_NASIDS];
45 nasid_t compact_to_nasid_node[MAX_COMPACT_NODES];
46 cnodeid_t cpuid_to_compact_node[MAXCPUS];
47
48 EXPORT_SYMBOL(nasid_to_compact_node);
49
50 struct cpuinfo_ip27 sn_cpu_info[NR_CPUS];
51 EXPORT_SYMBOL_GPL(sn_cpu_info);
52
53 extern void pcibr_setup(cnodeid_t);
54
per_hub_init(cnodeid_t cnode)55 static void per_hub_init(cnodeid_t cnode)
56 {
57 struct hub_data *hub = hub_data(cnode);
58 nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);
59
60 cpumask_set_cpu(smp_processor_id(), &hub->h_cpus);
61
62 if (test_and_set_bit(cnode, hub_init_mask))
63 return;
64 /*
65 * Set CRB timeout at 5ms, (< PI timeout of 10ms)
66 */
67 REMOTE_HUB_S(nasid, IIO_ICTP, 0x800);
68 REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);
69
70 hub_rtc_init(cnode);
71
72 if (nasid) {
73 /* copy exception handlers from first node to current node */
74 memcpy((void *)NODE_OFFSET_TO_K0(nasid, 0),
75 (void *)CKSEG0, 0x200);
76 __flush_cache_all();
77 /* switch to node local exception handlers */
78 REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_8K);
79 }
80 }
81
per_cpu_init(void)82 void per_cpu_init(void)
83 {
84 int cpu = smp_processor_id();
85 int slice = LOCAL_HUB_L(PI_CPU_NUM);
86 cnodeid_t cnode = get_compact_nodeid();
87 struct hub_data *hub = hub_data(cnode);
88
89 if (test_and_set_bit(slice, &hub->slice_map))
90 return;
91
92 clear_c0_status(ST0_IM);
93
94 per_hub_init(cnode);
95
96 cpu_time_init();
97 install_ipi();
98
99 /* Install our NMI handler if symmon hasn't installed one. */
100 install_cpu_nmi_handler(cputoslice(cpu));
101
102 enable_percpu_irq(IP27_HUB_PEND0_IRQ, IRQ_TYPE_NONE);
103 enable_percpu_irq(IP27_HUB_PEND1_IRQ, IRQ_TYPE_NONE);
104 }
105
106 /*
107 * get_nasid() returns the physical node id number of the caller.
108 */
109 nasid_t
get_nasid(void)110 get_nasid(void)
111 {
112 return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK)
113 >> NSRI_NODEID_SHFT);
114 }
115
116 /*
117 * Map the physical node id to a virtual node id (virtual node ids are contiguous).
118 */
get_compact_nodeid(void)119 cnodeid_t get_compact_nodeid(void)
120 {
121 return NASID_TO_COMPACT_NODEID(get_nasid());
122 }
123
124 extern void ip27_reboot_setup(void);
125
plat_mem_setup(void)126 void __init plat_mem_setup(void)
127 {
128 u64 p, e, n_mode;
129 nasid_t nid;
130
131 ip27_reboot_setup();
132
133 /*
134 * hub_rtc init and cpu clock intr enabled for later calibrate_delay.
135 */
136 nid = get_nasid();
137 printk("IP27: Running on node %d.\n", nid);
138
139 p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1;
140 e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1;
141 printk("Node %d has %s primary CPU%s.\n", nid,
142 p ? "a" : "no",
143 e ? ", CPU is running" : "");
144
145 p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1;
146 e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1;
147 printk("Node %d has %s secondary CPU%s.\n", nid,
148 p ? "a" : "no",
149 e ? ", CPU is running" : "");
150
151 /*
152 * Try to catch kernel missconfigurations and give user an
153 * indication what option to select.
154 */
155 n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK;
156 printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M');
157 #ifdef CONFIG_SGI_SN_N_MODE
158 if (!n_mode)
159 panic("Kernel compiled for M mode.");
160 #else
161 if (n_mode)
162 panic("Kernel compiled for N mode.");
163 #endif
164
165 ioport_resource.start = 0;
166 ioport_resource.end = ~0UL;
167 set_io_port_base(IO_BASE);
168 }
169
