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 40 static DECLARE_BITMAP(hub_init_mask, MAX_NUMNODES); 41 nasid_t master_nasid = INVALID_NASID; 42 43 struct cpuinfo_ip27 sn_cpu_info[NR_CPUS]; 44 EXPORT_SYMBOL_GPL(sn_cpu_info); 45 46 static 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 72 void 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 92 void __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 } 137 138 const char *get_system_type(void) 139 { 140 return "SGI Origin"; 141 } 142 143 void __init prom_init(void) 144 { 145 prom_init_cmdline(fw_arg0, (LONG *)fw_arg1); 146 prom_meminit(); 147 } 148 149