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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include <linux/kernel.h>
10#include <linux/init.h>
11#include <linux/sched.h>
Ralf Baechle631330f2009-06-19 14:05:26 +010012#include <linux/smp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <linux/mm.h>
14#include <linux/module.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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#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
41static DECLARE_BITMAP(hub_init_mask, MAX_COMPACT_NODES);
42nasid_t master_nasid = INVALID_NASID;
43
44cnodeid_t nasid_to_compact_node[MAX_NASIDS];
45nasid_t compact_to_nasid_node[MAX_COMPACT_NODES];
46cnodeid_t cpuid_to_compact_node[MAXCPUS];
47
48EXPORT_SYMBOL(nasid_to_compact_node);
49
Ralf Baechlecc6e8e02007-10-11 23:46:05 +010050struct cpuinfo_ip27 sn_cpu_info[NR_CPUS];
51EXPORT_SYMBOL_GPL(sn_cpu_info);
52
Linus Torvalds1da177e2005-04-16 15:20:36 -070053extern void pcibr_setup(cnodeid_t);
54
55extern void xtalk_probe_node(cnodeid_t nid);
56
Ralf Baechle234fcd12008-03-08 09:56:28 +000057static void __cpuinit per_hub_init(cnodeid_t cnode)
Linus Torvalds1da177e2005-04-16 15:20:36 -070058{
59 struct hub_data *hub = hub_data(cnode);
60 nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);
Ralf Baechle4f12bfe2005-03-21 18:59:38 +000061 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
63 cpu_set(smp_processor_id(), hub->h_cpus);
64
65 if (test_and_set_bit(cnode, hub_init_mask))
66 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 /*
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
Ralf Baechle4f12bfe2005-03-21 18:59:38 +000093
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 accidently
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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111}
112
Ralf Baechle06d428d2007-10-22 10:34:13 +0100113void __cpuinit per_cpu_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114{
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
Ralf Baechle4f12bfe2005-03-21 18:59:38 +0000127 per_hub_init(cnode);
128
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 for (i = 0; i < LEVELS_PER_SLICE; i++)
130 si->level_to_irq[i] = -1;
131
132 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 * 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145}
146
147/*
148 * get_nasid() returns the physical node id number of the caller.
149 */
150nasid_t
151get_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 */
160cnodeid_t get_compact_nodeid(void)
161{
162 return NASID_TO_COMPACT_NODEID(get_nasid());
163}
164
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176extern void ip27_reboot_setup(void);
177
Ralf Baechle2925aba2006-06-18 01:32:22 +0100178void __init plat_mem_setup(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179{
180 hubreg_t p, e, n_mode;
181 nasid_t nid;
182
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 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');
Ralf Baechleaa9772e2006-06-12 00:55:14 +0100209#ifdef CONFIG_SGI_SN_N_MODE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 ioc3_eth_init();
218 per_cpu_init();
219
220 set_io_port_base(IO_BASE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221}