/* * 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/sgialib.h> #include <asm/time.h> #include <asm/sn/agent.h> #include <asm/sn/types.h> #include <asm/sn/klconfig.h> #include <asm/sn/ioc3.h> #include <asm/mipsregs.h> #include <asm/sn/gda.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/mapped_kernel.h>
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);
if (nasid) { /* copy exception handlers from first node to current node */
memcpy((void *)NODE_OFFSET_TO_K0(nasid, 0),
(void *)CKSEG0, 0x200);
__flush_cache_all(); /* switch to node local exception handlers */
REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_8K);
}
}
void per_cpu_init(void)
{ int cpu = smp_processor_id();
nasid_t nasid = get_nasid();
clear_c0_status(ST0_IM);
per_hub_init(nasid);
pr_info("CPU %d clock is %dMHz.\n", cpu, sn_cpu_info[cpu].p_speed);
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
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