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/types.h> 23 #include <asm/sn/sn0/addrs.h> 24 #include <asm/sn/sn0/hubni.h> 25 #include <asm/sn/sn0/hubio.h> 26 #include <asm/sn/klconfig.h> 27 #include <asm/sn/ioc3.h> 28 #include <asm/mipsregs.h> 29 #include <asm/sn/gda.h> 30 #include <asm/sn/hub.h> 31 #include <asm/sn/intr.h> 32 #include <asm/current.h> 33 #include <asm/processor.h> 34 #include <asm/mmu_context.h> 35 #include <asm/thread_info.h> 36 #include <asm/sn/launch.h> 37 #include <asm/sn/sn_private.h> 38 #include <asm/sn/sn0/ip27.h> 39 #include <asm/sn/mapped_kernel.h> 40 41 #include "ip27-common.h" 42 43 #define CPU_NONE (cpuid_t)-1 44 45 static DECLARE_BITMAP(hub_init_mask, MAX_NUMNODES); 46 nasid_t master_nasid = INVALID_NASID; 47 48 struct cpuinfo_ip27 sn_cpu_info[NR_CPUS]; 49 EXPORT_SYMBOL_GPL(sn_cpu_info); 50 51 static void per_hub_init(nasid_t nasid) 52 { 53 struct hub_data *hub = hub_data(nasid); 54 55 cpumask_set_cpu(smp_processor_id(), &hub->h_cpus); 56 57 if (test_and_set_bit(nasid, hub_init_mask)) 58 return; 59 /* 60 * Set CRB timeout at 5ms, (< PI timeout of 10ms) 61 */ 62 REMOTE_HUB_S(nasid, IIO_ICTP, 0x800); 63 REMOTE_HUB_S(nasid, IIO_ICTO, 0xff); 64 65 hub_rtc_init(nasid); 66 67 if (nasid) { 68 /* copy exception handlers from first node to current node */ 69 memcpy((void *)NODE_OFFSET_TO_K0(nasid, 0), 70 (void *)CKSEG0, 0x200); 71 __flush_cache_all(); 72 /* switch to node local exception handlers */ 73 REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_8K); 74 } 75 } 76 77 void per_cpu_init(void) 78 { 79 int cpu = smp_processor_id(); 80 int slice = LOCAL_HUB_L(PI_CPU_NUM); 81 nasid_t nasid = get_nasid(); 82 struct hub_data *hub = hub_data(nasid); 83 84 if (test_and_set_bit(slice, &hub->slice_map)) 85 return; 86 87 clear_c0_status(ST0_IM); 88 89 per_hub_init(nasid); 90 91 cpu_time_init(); 92 install_ipi(); 93 94 /* Install our NMI handler if symmon hasn't installed one. */ 95 install_cpu_nmi_handler(cputoslice(cpu)); 96 97 enable_percpu_irq(IP27_HUB_PEND0_IRQ, IRQ_TYPE_NONE); 98 enable_percpu_irq(IP27_HUB_PEND1_IRQ, IRQ_TYPE_NONE); 99 } 100 101 /* 102 * get_nasid() returns the physical node id number of the caller. 103 */ 104 nasid_t 105 get_nasid(void) 106 { 107 return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK) 108 >> NSRI_NODEID_SHFT); 109 } 110 111 void __init plat_mem_setup(void) 112 { 113 u64 p, e, n_mode; 114 nasid_t nid; 115 116 register_smp_ops(&ip27_smp_ops); 117 118 ip27_reboot_setup(); 119 120 /* 121 * hub_rtc init and cpu clock intr enabled for later calibrate_delay. 122 */ 123 nid = get_nasid(); 124 printk("IP27: Running on node %d.\n", nid); 125 126 p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1; 127 e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1; 128 printk("Node %d has %s primary CPU%s.\n", nid, 129 p ? "a" : "no", 130 e ? ", CPU is running" : ""); 131 132 p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1; 133 e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1; 134 printk("Node %d has %s secondary CPU%s.\n", nid, 135 p ? "a" : "no", 136 e ? ", CPU is running" : ""); 137 138 /* 139 * Try to catch kernel missconfigurations and give user an 140 * indication what option to select. 141 */ 142 n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK; 143 printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M'); 144 #ifdef CONFIG_SGI_SN_N_MODE 145 if (!n_mode) 146 panic("Kernel compiled for M mode."); 147 #else 148 if (n_mode) 149 panic("Kernel compiled for N mode."); 150 #endif 151 152 ioport_resource.start = 0; 153 ioport_resource.end = ~0UL; 154 set_io_port_base(IO_BASE); 155 } 156 157 const char *get_system_type(void) 158 { 159 return "SGI Origin"; 160 } 161 162 void __init prom_init(void) 163 { 164 prom_init_cmdline(fw_arg0, (LONG *)fw_arg1); 165 prom_meminit(); 166 } 167 168