161 lines
3.9 KiB
C
161 lines
3.9 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file "COPYING" in the main directory of this
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* archive for more details.
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*
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* Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
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* Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/smp.h>
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#include <linux/mm.h>
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#include <linux/export.h>
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#include <linux/cpumask.h>
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#include <asm/cpu.h>
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#include <asm/io.h>
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#include <asm/pgtable.h>
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#include <asm/time.h>
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#include <asm/sn/types.h>
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#include <asm/sn/sn0/addrs.h>
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#include <asm/sn/sn0/hubni.h>
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#include <asm/sn/sn0/hubio.h>
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#include <asm/sn/klconfig.h>
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#include <asm/sn/ioc3.h>
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#include <asm/mipsregs.h>
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#include <asm/sn/gda.h>
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#include <asm/sn/hub.h>
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#include <asm/sn/intr.h>
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#include <asm/current.h>
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#include <asm/processor.h>
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#include <asm/mmu_context.h>
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#include <asm/thread_info.h>
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#include <asm/sn/launch.h>
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#include <asm/sn/sn_private.h>
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#include <asm/sn/sn0/ip27.h>
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#include <asm/sn/mapped_kernel.h>
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#include "ip27-common.h"
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#define CPU_NONE (cpuid_t)-1
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static DECLARE_BITMAP(hub_init_mask, MAX_COMPACT_NODES);
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nasid_t master_nasid = INVALID_NASID;
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struct cpuinfo_ip27 sn_cpu_info[NR_CPUS];
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EXPORT_SYMBOL_GPL(sn_cpu_info);
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static void per_hub_init(nasid_t nasid)
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{
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struct hub_data *hub = hub_data(nasid);
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cpumask_set_cpu(smp_processor_id(), &hub->h_cpus);
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if (test_and_set_bit(nasid, hub_init_mask))
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return;
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/*
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* Set CRB timeout at 5ms, (< PI timeout of 10ms)
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*/
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REMOTE_HUB_S(nasid, IIO_ICTP, 0x800);
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REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);
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hub_rtc_init(nasid);
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#ifdef CONFIG_REPLICATE_EXHANDLERS
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/*
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* If this is not a headless node initialization,
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* copy over the caliased exception handlers.
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*/
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if (get_nasid() == nasid) {
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extern char except_vec2_generic, except_vec3_generic;
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extern void build_tlb_refill_handler(void);
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memcpy((void *)(CKSEG0 + 0x100), &except_vec2_generic, 0x80);
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memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x80);
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build_tlb_refill_handler();
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memcpy((void *)(CKSEG0 + 0x100), (void *) CKSEG0, 0x80);
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memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x100);
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__flush_cache_all();
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}
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#endif
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}
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void per_cpu_init(void)
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{
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int cpu = smp_processor_id();
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int slice = LOCAL_HUB_L(PI_CPU_NUM);
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nasid_t nasid = get_nasid();
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struct hub_data *hub = hub_data(nasid);
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if (test_and_set_bit(slice, &hub->slice_map))
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return;
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clear_c0_status(ST0_IM);
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per_hub_init(nasid);
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cpu_time_init();
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install_ipi();
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/* Install our NMI handler if symmon hasn't installed one. */
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install_cpu_nmi_handler(cputoslice(cpu));
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enable_percpu_irq(IP27_HUB_PEND0_IRQ, IRQ_TYPE_NONE);
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enable_percpu_irq(IP27_HUB_PEND1_IRQ, IRQ_TYPE_NONE);
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}
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/*
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* get_nasid() returns the physical node id number of the caller.
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*/
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nasid_t
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get_nasid(void)
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{
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return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK)
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>> NSRI_NODEID_SHFT);
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}
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void __init plat_mem_setup(void)
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{
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u64 p, e, n_mode;
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nasid_t nid;
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ip27_reboot_setup();
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/*
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* hub_rtc init and cpu clock intr enabled for later calibrate_delay.
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*/
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nid = get_nasid();
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printk("IP27: Running on node %d.\n", nid);
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p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1;
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e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1;
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printk("Node %d has %s primary CPU%s.\n", nid,
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p ? "a" : "no",
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e ? ", CPU is running" : "");
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p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1;
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e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1;
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printk("Node %d has %s secondary CPU%s.\n", nid,
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p ? "a" : "no",
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e ? ", CPU is running" : "");
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/*
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* Try to catch kernel missconfigurations and give user an
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* indication what option to select.
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*/
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n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK;
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printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M');
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#ifdef CONFIG_SGI_SN_N_MODE
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if (!n_mode)
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panic("Kernel compiled for M mode.");
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#else
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if (n_mode)
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panic("Kernel compiled for N mode.");
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#endif
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ioport_resource.start = 0;
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ioport_resource.end = ~0UL;
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set_io_port_base(IO_BASE);
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}
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