arm64: dts: Revert "specify console via command line"
[linux/fpc-iii.git] / arch / mips / sgi-ip27 / ip27-init.c
blob32bcb8d1dd885debc5213500342cec6b6c970946
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.
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/pgtable.h>
20 #include <asm/sgialib.h>
21 #include <asm/time.h>
22 #include <asm/sn/agent.h>
23 #include <asm/sn/types.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/intr.h>
29 #include <asm/current.h>
30 #include <asm/processor.h>
31 #include <asm/mmu_context.h>
32 #include <asm/thread_info.h>
33 #include <asm/sn/launch.h>
34 #include <asm/sn/mapped_kernel.h>
36 #include "ip27-common.h"
38 #define CPU_NONE (cpuid_t)-1
40 static DECLARE_BITMAP(hub_init_mask, MAX_NUMNODES);
41 nasid_t master_nasid = INVALID_NASID;
43 struct cpuinfo_ip27 sn_cpu_info[NR_CPUS];
44 EXPORT_SYMBOL_GPL(sn_cpu_info);
46 static void per_hub_init(nasid_t nasid)
48 struct hub_data *hub = hub_data(nasid);
50 cpumask_set_cpu(smp_processor_id(), &hub->h_cpus);
52 if (test_and_set_bit(nasid, hub_init_mask))
53 return;
55 * Set CRB timeout at 5ms, (< PI timeout of 10ms)
57 REMOTE_HUB_S(nasid, IIO_ICTP, 0x800);
58 REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);
60 hub_rtc_init(nasid);
62 if (nasid) {
63 /* copy exception handlers from first node to current node */
64 memcpy((void *)NODE_OFFSET_TO_K0(nasid, 0),
65 (void *)CKSEG0, 0x200);
66 __flush_cache_all();
67 /* switch to node local exception handlers */
68 REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_8K);
72 void per_cpu_init(void)
74 int cpu = smp_processor_id();
75 nasid_t nasid = get_nasid();
77 clear_c0_status(ST0_IM);
79 per_hub_init(nasid);
81 pr_info("CPU %d clock is %dMHz.\n", cpu, sn_cpu_info[cpu].p_speed);
83 install_ipi();
85 /* Install our NMI handler if symmon hasn't installed one. */
86 install_cpu_nmi_handler(cputoslice(cpu));
88 enable_percpu_irq(IP27_HUB_PEND0_IRQ, IRQ_TYPE_NONE);
89 enable_percpu_irq(IP27_HUB_PEND1_IRQ, IRQ_TYPE_NONE);
92 void __init plat_mem_setup(void)
94 u64 p, e, n_mode;
95 nasid_t nid;
97 register_smp_ops(&ip27_smp_ops);
99 ip27_reboot_setup();
102 * hub_rtc init and cpu clock intr enabled for later calibrate_delay.
104 nid = get_nasid();
105 printk("IP27: Running on node %d.\n", nid);
107 p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1;
108 e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1;
109 printk("Node %d has %s primary CPU%s.\n", nid,
110 p ? "a" : "no",
111 e ? ", CPU is running" : "");
113 p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1;
114 e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1;
115 printk("Node %d has %s secondary CPU%s.\n", nid,
116 p ? "a" : "no",
117 e ? ", CPU is running" : "");
120 * Try to catch kernel missconfigurations and give user an
121 * indication what option to select.
123 n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK;
124 printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M');
125 #ifdef CONFIG_SGI_SN_N_MODE
126 if (!n_mode)
127 panic("Kernel compiled for M mode.");
128 #else
129 if (n_mode)
130 panic("Kernel compiled for N mode.");
131 #endif
133 ioport_resource.start = 0;
134 ioport_resource.end = ~0UL;
135 set_io_port_base(IO_BASE);
138 const char *get_system_type(void)
140 return "SGI Origin";
143 void __init prom_init(void)
145 prom_init_cmdline(fw_arg0, (LONG *)fw_arg1);
146 prom_meminit();