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/*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file "COPYING" in the main directory of this
* archive for more details.
*
* Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
* Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/smp.h>
#include <linux/mm.h>
#include <linux/export.h>
#include <linux/cpumask.h>
#include <asm/bootinfo.h>
#include <asm/cpu.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/sgialib.h>
#include <asm/time.h>
#include <asm/sn/types.h>
#include <asm/sn/sn0/addrs.h>
#include <asm/sn/sn0/hubni.h>
#include <asm/sn/sn0/hubio.h>
#include <asm/sn/klconfig.h>
#include <asm/sn/ioc3.h>
#include <asm/mipsregs.h>
#include <asm/sn/gda.h>
#include <asm/sn/hub.h>
#include <asm/sn/intr.h>
#include <asm/current.h>
#include <asm/processor.h>
#include <asm/mmu_context.h>
#include <asm/thread_info.h>
#include <asm/sn/launch.h>
#include <asm/sn/sn_private.h>
#include <asm/sn/sn0/ip27.h>
#include <asm/sn/mapped_kernel.h>
#include "ip27-common.h"
#define CPU_NONE (cpuid_t)-1
static DECLARE_BITMAP(hub_init_mask, MAX_NUMNODES);
nasid_t master_nasid = INVALID_NASID;
struct cpuinfo_ip27 sn_cpu_info[NR_CPUS];
EXPORT_SYMBOL_GPL(sn_cpu_info);
static void per_hub_init(nasid_t nasid)
{
struct hub_data *hub = hub_data(nasid);
cpumask_set_cpu(smp_processor_id(), &hub->h_cpus);
if (test_and_set_bit(nasid, hub_init_mask))
return;
/*
* Set CRB timeout at 5ms, (< PI timeout of 10ms)
*/
REMOTE_HUB_S(nasid, IIO_ICTP, 0x800);
REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);
hub_rtc_init(nasid);
#ifdef CONFIG_REPLICATE_EXHANDLERS
/*
* If this is not a headless node initialization,
* copy over the caliased exception handlers.
*/
if (get_nasid() == nasid) {
extern char except_vec2_generic, except_vec3_generic;
extern void build_tlb_refill_handler(void);
memcpy((void *)(CKSEG0 + 0x100), &except_vec2_generic, 0x80);
memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x80);
build_tlb_refill_handler();
memcpy((void *)(CKSEG0 + 0x100), (void *) CKSEG0, 0x80);
memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x100);
__flush_cache_all();
}
#endif
}
void per_cpu_init(void)
{
int cpu = smp_processor_id();
int slice = LOCAL_HUB_L(PI_CPU_NUM);
nasid_t nasid = get_nasid();
struct hub_data *hub = hub_data(nasid);
if (test_and_set_bit(slice, &hub->slice_map))
return;
clear_c0_status(ST0_IM);
per_hub_init(nasid);
cpu_time_init();
install_ipi();
/* Install our NMI handler if symmon hasn't installed one. */
install_cpu_nmi_handler(cputoslice(cpu));
enable_percpu_irq(IP27_HUB_PEND0_IRQ, IRQ_TYPE_NONE);
enable_percpu_irq(IP27_HUB_PEND1_IRQ, IRQ_TYPE_NONE);
}
/*
* get_nasid() returns the physical node id number of the caller.
*/
nasid_t
get_nasid(void)
{
return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK)
>> NSRI_NODEID_SHFT);
}
void __init plat_mem_setup(void)
{
u64 p, e, n_mode;
nasid_t nid;
register_smp_ops(&ip27_smp_ops);
ip27_reboot_setup();
/*
* hub_rtc init and cpu clock intr enabled for later calibrate_delay.
*/
nid = get_nasid();
printk("IP27: Running on node %d.\n", nid);
p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1;
e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1;
printk("Node %d has %s primary CPU%s.\n", nid,
p ? "a" : "no",
e ? ", CPU is running" : "");
p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1;
e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1;
printk("Node %d has %s secondary CPU%s.\n", nid,
p ? "a" : "no",
e ? ", CPU is running" : "");
/*
* Try to catch kernel missconfigurations and give user an
* indication what option to select.
*/
n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK;
printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M');
#ifdef CONFIG_SGI_SN_N_MODE
if (!n_mode)
panic("Kernel compiled for M mode.");
#else
if (n_mode)
panic("Kernel compiled for N mode.");
#endif
ioport_resource.start = 0;
ioport_resource.end = ~0UL;
set_io_port_base(IO_BASE);
}
const char *get_system_type(void)
{
return "SGI Origin";
}
void __init prom_init(void)
{
prom_init_cmdline(fw_arg0, (LONG *)fw_arg1);
prom_meminit();
}
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