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/arch/mips/sgi-ip27/ip27-init.c

http://github.com/mirrors/linux
C | 148 lines | 100 code | 27 blank | 21 comment | 4 complexity | e8a09a0c1e021be19511d2f87c3d74e9 MD5 | raw file
  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/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>
 35
 36#include "ip27-common.h"
 37
 38#define CPU_NONE		(cpuid_t)-1
 39
 40static DECLARE_BITMAP(hub_init_mask, MAX_NUMNODES);
 41nasid_t master_nasid = INVALID_NASID;
 42
 43struct cpuinfo_ip27 sn_cpu_info[NR_CPUS];
 44EXPORT_SYMBOL_GPL(sn_cpu_info);
 45
 46static void per_hub_init(nasid_t nasid)
 47{
 48	struct hub_data *hub = hub_data(nasid);
 49
 50	cpumask_set_cpu(smp_processor_id(), &hub->h_cpus);
 51
 52	if (test_and_set_bit(nasid, hub_init_mask))
 53		return;
 54	/*
 55	 * Set CRB timeout at 5ms, (< PI timeout of 10ms)
 56	 */
 57	REMOTE_HUB_S(nasid, IIO_ICTP, 0x800);
 58	REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);
 59
 60	hub_rtc_init(nasid);
 61
 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);
 69	}
 70}
 71
 72void per_cpu_init(void)
 73{
 74	int cpu = smp_processor_id();
 75	nasid_t nasid = get_nasid();
 76
 77	clear_c0_status(ST0_IM);
 78
 79	per_hub_init(nasid);
 80
 81	pr_info("CPU %d clock is %dMHz.\n", cpu, sn_cpu_info[cpu].p_speed);
 82
 83	install_ipi();
 84
 85	/* Install our NMI handler if symmon hasn't installed one. */
 86	install_cpu_nmi_handler(cputoslice(cpu));
 87
 88	enable_percpu_irq(IP27_HUB_PEND0_IRQ, IRQ_TYPE_NONE);
 89	enable_percpu_irq(IP27_HUB_PEND1_IRQ, IRQ_TYPE_NONE);
 90}
 91
 92void __init plat_mem_setup(void)
 93{
 94	u64 p, e, n_mode;
 95	nasid_t nid;
 96
 97	register_smp_ops(&ip27_smp_ops);
 98
 99	ip27_reboot_setup();
100
101	/*
102	 * hub_rtc init and cpu clock intr enabled for later calibrate_delay.
103	 */
104	nid = get_nasid();
105	printk("IP27: Running on node %d.\n", nid);
106
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" : "");
112
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" : "");
118
119	/*
120	 * Try to catch kernel missconfigurations and give user an
121	 * indication what option to select.
122	 */
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
132
133	ioport_resource.start = 0;
134	ioport_resource.end = ~0UL;
135	set_io_port_base(IO_BASE);
136}
137
138const char *get_system_type(void)
139{
140	return "SGI Origin";
141}
142
143void __init prom_init(void)
144{
145	prom_init_cmdline(fw_arg0, (LONG *)fw_arg1);
146	prom_meminit();
147}
148