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/bootinfo.h> |
17 | #include <asm/cpu.h> |
18 | #include <asm/io.h> |
19 | #include <asm/sgialib.h> |
20 | #include <asm/time.h> |
21 | #include <asm/sn/agent.h> |
22 | #include <asm/sn/types.h> |
23 | #include <asm/sn/klconfig.h> |
24 | #include <asm/sn/ioc3.h> |
25 | #include <asm/mipsregs.h> |
26 | #include <asm/sn/gda.h> |
27 | #include <asm/sn/intr.h> |
28 | #include <asm/current.h> |
29 | #include <asm/processor.h> |
30 | #include <asm/mmu_context.h> |
31 | #include <asm/thread_info.h> |
32 | #include <asm/sn/launch.h> |
33 | #include <asm/sn/mapped_kernel.h> |
34 | |
35 | #include "ip27-common.h" |
36 | |
37 | #define CPU_NONE (cpuid_t)-1 |
38 | |
39 | static DECLARE_BITMAP(hub_init_mask, MAX_NUMNODES); |
40 | nasid_t master_nasid = INVALID_NASID; |
41 | |
42 | struct cpuinfo_ip27 sn_cpu_info[NR_CPUS]; |
43 | EXPORT_SYMBOL_GPL(sn_cpu_info); |
44 | |
45 | static void per_hub_init(nasid_t nasid) |
46 | { |
47 | struct hub_data *hub = hub_data(nasid); |
48 | |
49 | cpumask_set_cpu(smp_processor_id(), dstp: &hub->h_cpus); |
50 | |
51 | if (test_and_set_bit(nr: nasid, addr: hub_init_mask)) |
52 | return; |
53 | /* |
54 | * Set CRB timeout at 5ms, (< PI timeout of 10ms) |
55 | */ |
56 | REMOTE_HUB_S(nasid, IIO_ICTP, 0x800); |
57 | REMOTE_HUB_S(nasid, IIO_ICTO, 0xff); |
58 | |
59 | hub_rtc_init(nasid); |
60 | |
61 | if (nasid) { |
62 | /* copy exception handlers from first node to current node */ |
63 | memcpy((void *)NODE_OFFSET_TO_K0(nasid, 0), |
64 | (void *)CKSEG0, 0x200); |
65 | __flush_cache_all(); |
66 | /* switch to node local exception handlers */ |
67 | REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_8K); |
68 | } |
69 | } |
70 | |
71 | void per_cpu_init(void) |
72 | { |
73 | int cpu = smp_processor_id(); |
74 | nasid_t nasid = get_nasid(); |
75 | |
76 | clear_c0_status(ST0_IM); |
77 | |
78 | per_hub_init(nasid); |
79 | |
80 | pr_info("CPU %d clock is %dMHz.\n" , cpu, sn_cpu_info[cpu].p_speed); |
81 | |
82 | install_ipi(); |
83 | |
84 | /* Install our NMI handler if symmon hasn't installed one. */ |
85 | install_cpu_nmi_handler(slice: cputoslice(cpu)); |
86 | |
87 | enable_percpu_irq(IP27_HUB_PEND0_IRQ, IRQ_TYPE_NONE); |
88 | enable_percpu_irq(IP27_HUB_PEND1_IRQ, IRQ_TYPE_NONE); |
89 | } |
90 | |
91 | void __init plat_mem_setup(void) |
92 | { |
93 | u64 p, e, n_mode; |
94 | nasid_t nid; |
95 | |
96 | register_smp_ops(&ip27_smp_ops); |
97 | |
98 | ip27_reboot_setup(); |
99 | |
100 | /* |
101 | * hub_rtc init and cpu clock intr enabled for later calibrate_delay. |
102 | */ |
103 | nid = get_nasid(); |
104 | printk("IP27: Running on node %d.\n" , nid); |
105 | |
106 | p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1; |
107 | e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1; |
108 | printk("Node %d has %s primary CPU%s.\n" , nid, |
109 | p ? "a" : "no" , |
110 | e ? ", CPU is running" : "" ); |
111 | |
112 | p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1; |
113 | e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1; |
114 | printk("Node %d has %s secondary CPU%s.\n" , nid, |
115 | p ? "a" : "no" , |
116 | e ? ", CPU is running" : "" ); |
117 | |
118 | /* |
119 | * Try to catch kernel missconfigurations and give user an |
120 | * indication what option to select. |
121 | */ |
122 | n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK; |
123 | printk("Machine is in %c mode.\n" , n_mode ? 'N' : 'M'); |
124 | #ifdef CONFIG_SGI_SN_N_MODE |
125 | if (!n_mode) |
126 | panic("Kernel compiled for M mode." ); |
127 | #else |
128 | if (n_mode) |
129 | panic(fmt: "Kernel compiled for N mode." ); |
130 | #endif |
131 | |
132 | ioport_resource.start = 0; |
133 | ioport_resource.end = ~0UL; |
134 | set_io_port_base(IO_BASE); |
135 | } |
136 | |
137 | const char *get_system_type(void) |
138 | { |
139 | return "SGI Origin" ; |
140 | } |
141 | |
142 | void __init prom_init(void) |
143 | { |
144 | prom_init_cmdline(fw_arg0, (LONG *)fw_arg1); |
145 | prom_meminit(); |
146 | } |
147 | |
148 | |