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/sgialib.h> 20 #include <asm/time.h> 21 #include <asm/sn/agent.h> 22 #include <asm/sn/types.h> 23 #include <asm/sn/klconfig.h> 24 #include <asm/sn/ioc3.h> 25 #include <asm/mipsregs.h> 26 #include <asm/sn/gda.h> 27 #include <asm/sn/intr.h> 28 #include <asm/current.h> 29 #include <asm/processor.h> 30 #include <asm/mmu_context.h> 31 #include <asm/thread_info.h> 32 #include <asm/sn/launch.h> 33 #include <asm/sn/mapped_kernel.h> 34 35 #include "ip27-common.h" 36 37 #define CPU_NONE (cpuid_t)-1 38 39 static DECLARE_BITMAP(hub_init_mask, MAX_NUMNODES); 40 nasid_t master_nasid = INVALID_NASID; 41 42 struct cpuinfo_ip27 sn_cpu_info[NR_CPUS]; 43 EXPORT_SYMBOL_GPL(sn_cpu_info); 44 45 static void per_hub_init(nasid_t nasid) 46 { 47 struct hub_data *hub = hub_data(nasid); 48 49 cpumask_set_cpu(smp_processor_id(), &hub->h_cpus); 50 51 if (test_and_set_bit(nasid, hub_init_mask)) 52 return; 53 /* 54 * Set CRB timeout at 5ms, (< PI timeout of 10ms) 55 */ 56 REMOTE_HUB_S(nasid, IIO_ICTP, 0x800); 57 REMOTE_HUB_S(nasid, IIO_ICTO, 0xff); 58 59 hub_rtc_init(nasid); 60 61 if (nasid) { 62 /* copy exception handlers from first node to current node */ 63 memcpy((void *)NODE_OFFSET_TO_K0(nasid, 0), 64 (void *)CKSEG0, 0x200); 65 __flush_cache_all(); 66 /* switch to node local exception handlers */ 67 REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_8K); 68 } 69 } 70 71 void per_cpu_init(void) 72 { 73 int cpu = smp_processor_id(); 74 nasid_t nasid = get_nasid(); 75 76 clear_c0_status(ST0_IM); 77 78 per_hub_init(nasid); 79 80 pr_info("CPU %d clock is %dMHz.\n", cpu, sn_cpu_info[cpu].p_speed); 81 82 install_ipi(); 83 84 /* Install our NMI handler if symmon hasn't installed one. */ 85 install_cpu_nmi_handler(cputoslice(cpu)); 86 87 enable_percpu_irq(IP27_HUB_PEND0_IRQ, IRQ_TYPE_NONE); 88 enable_percpu_irq(IP27_HUB_PEND1_IRQ, IRQ_TYPE_NONE); 89 } 90 91 void __init plat_mem_setup(void) 92 { 93 u64 p, e, n_mode; 94 nasid_t nid; 95 96 register_smp_ops(&ip27_smp_ops); 97 98 ip27_reboot_setup(); 99 100 /* 101 * hub_rtc init and cpu clock intr enabled for later calibrate_delay. 102 */ 103 nid = get_nasid(); 104 printk("IP27: Running on node %d.\n", nid); 105 106 p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1; 107 e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1; 108 printk("Node %d has %s primary CPU%s.\n", nid, 109 p ? "a" : "no", 110 e ? ", CPU is running" : ""); 111 112 p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1; 113 e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1; 114 printk("Node %d has %s secondary CPU%s.\n", nid, 115 p ? "a" : "no", 116 e ? ", CPU is running" : ""); 117 118 /* 119 * Try to catch kernel missconfigurations and give user an 120 * indication what option to select. 121 */ 122 n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK; 123 printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M'); 124 #ifdef CONFIG_SGI_SN_N_MODE 125 if (!n_mode) 126 panic("Kernel compiled for M mode."); 127 #else 128 if (n_mode) 129 panic("Kernel compiled for N mode."); 130 #endif 131 132 ioport_resource.start = 0; 133 ioport_resource.end = ~0UL; 134 set_io_port_base(IO_BASE); 135 } 136 137 const char *get_system_type(void) 138 { 139 return "SGI Origin"; 140 } 141 142 void __init prom_init(void) 143 { 144 prom_init_cmdline(fw_arg0, (LONG *)fw_arg1); 145 prom_meminit(); 146 } 147 148