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
55 extern void xtalk_probe_node(cnodeid_t nid);
56
per_hub_init(cnodeid_t cnode)57 static void per_hub_init(cnodeid_t cnode)
58 {
59 struct hub_data *hub = hub_data(cnode);
60 nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);
61 int i;
62
63 cpumask_set_cpu(smp_processor_id(), &hub->h_cpus);
64
65 if (test_and_set_bit(cnode, hub_init_mask))
66 return;
67 /*
68 * Set CRB timeout at 5ms, (< PI timeout of 10ms)
69 */
70 REMOTE_HUB_S(nasid, IIO_ICTP, 0x800);
71 REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);
72
73 hub_rtc_init(cnode);
74 xtalk_probe_node(cnode);
75
76 #ifdef CONFIG_REPLICATE_EXHANDLERS
77 /*
78 * If this is not a headless node initialization,
79 * copy over the caliased exception handlers.
80 */
81 if (get_compact_nodeid() == cnode) {
82 extern char except_vec2_generic, except_vec3_generic;
83 extern void build_tlb_refill_handler(void);
84
85 memcpy((void *)(CKSEG0 + 0x100), &except_vec2_generic, 0x80);
86 memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x80);
87 build_tlb_refill_handler();
88 memcpy((void *)(CKSEG0 + 0x100), (void *) CKSEG0, 0x80);
89 memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x100);
90 __flush_cache_all();
91 }
92 #endif
93
94 /*
95 * Some interrupts are reserved by hardware or by software convention.
96 * Mark these as reserved right away so they won't be used accidentally
97 * later.
98 */
99 for (i = 0; i <= BASE_PCI_IRQ; i++) {
100 __set_bit(i, hub->irq_alloc_mask);
101 LOCAL_HUB_CLR_INTR(INT_PEND0_BASELVL + i);
102 }
103
104 __set_bit(IP_PEND0_6_63, hub->irq_alloc_mask);
105 LOCAL_HUB_S(PI_INT_PEND_MOD, IP_PEND0_6_63);
106
107 for (i = NI_BRDCAST_ERR_A; i <= MSC_PANIC_INTR; i++) {
108 __set_bit(i, hub->irq_alloc_mask);
109 LOCAL_HUB_CLR_INTR(INT_PEND1_BASELVL + i);
110 }
111 }
112
per_cpu_init(void)113 void per_cpu_init(void)
114 {
115 int cpu = smp_processor_id();
116 int slice = LOCAL_HUB_L(PI_CPU_NUM);
117 cnodeid_t cnode = get_compact_nodeid();
118 struct hub_data *hub = hub_data(cnode);
119 struct slice_data *si = hub->slice + slice;
120 int i;
121
122 if (test_and_set_bit(slice, &hub->slice_map))
123 return;
124
125 clear_c0_status(ST0_IM);
126
127 per_hub_init(cnode);
128
129 for (i = 0; i < LEVELS_PER_SLICE; i++)
130 si->level_to_irq[i] = -1;
131
132 /*
133 * We use this so we can find the local hub's data as fast as only
134 * possible.
135 */
136 cpu_data[cpu].data = si;
137
138 cpu_time_init();
139 install_ipi();
140
141 /* Install our NMI handler if symmon hasn't installed one. */
142 install_cpu_nmi_handler(cputoslice(cpu));
143
144 set_c0_status(SRB_DEV0 | SRB_DEV1);
145 }
146
147 /*
148 * get_nasid() returns the physical node id number of the caller.
149 */
150 nasid_t
get_nasid(void)151 get_nasid(void)
152 {
153 return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK)
154 >> NSRI_NODEID_SHFT);
155 }
156
157 /*
158 * Map the physical node id to a virtual node id (virtual node ids are contiguous).
159 */
get_compact_nodeid(void)160 cnodeid_t get_compact_nodeid(void)
161 {
162 return NASID_TO_COMPACT_NODEID(get_nasid());
163 }
164
ioc3_eth_init(void)165 static inline void ioc3_eth_init(void)
166 {
167 struct ioc3 *ioc3;
168 nasid_t nid;
169
170 nid = get_nasid();
171 ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base;
172
173 ioc3->eier = 0;
174 }
175
176 extern void ip27_reboot_setup(void);
177
plat_mem_setup(void)178 void __init plat_mem_setup(void)
179 {
180 hubreg_t p, e, n_mode;
181 nasid_t nid;
182
183 ip27_reboot_setup();
184
185 /*
186 * hub_rtc init and cpu clock intr enabled for later calibrate_delay.
187 */
188 nid = get_nasid();
189 printk("IP27: Running on node %d.\n", nid);
190
191 p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1;
192 e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1;
193 printk("Node %d has %s primary CPU%s.\n", nid,
194 p ? "a" : "no",
195 e ? ", CPU is running" : "");
196
197 p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1;
198 e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1;
199 printk("Node %d has %s secondary CPU%s.\n", nid,
200 p ? "a" : "no",
201 e ? ", CPU is running" : "");
202
203 /*
204 * Try to catch kernel missconfigurations and give user an
205 * indication what option to select.
206 */
207 n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK;
208 printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M');
209 #ifdef CONFIG_SGI_SN_N_MODE
210 if (!n_mode)
211 panic("Kernel compiled for M mode.");
212 #else
213 if (n_mode)
214 panic("Kernel compiled for N mode.");
215 #endif
216
217 ioc3_eth_init();
218 per_cpu_init();
219
220 set_io_port_base(IO_BASE);
221 }
222
