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/cpu.h> 17 #include <asm/io.h> 18 #include <asm/pgtable.h> 19 #include <asm/time.h> 20 #include <asm/sn/types.h> 21 #include <asm/sn/sn0/addrs.h> 22 #include <asm/sn/sn0/hubni.h> 23 #include <asm/sn/sn0/hubio.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/hub.h> 29 #include <asm/sn/intr.h> 30 #include <asm/current.h> 31 #include <asm/processor.h> 32 #include <asm/mmu_context.h> 33 #include <asm/thread_info.h> 34 #include <asm/sn/launch.h> 35 #include <asm/sn/sn_private.h> 36 #include <asm/sn/sn0/ip27.h> 37 #include <asm/sn/mapped_kernel.h> 38 39 #define CPU_NONE (cpuid_t)-1 40 41 static DECLARE_BITMAP(hub_init_mask, MAX_COMPACT_NODES); 42 nasid_t master_nasid = INVALID_NASID; 43 44 cnodeid_t nasid_to_compact_node[MAX_NASIDS]; 45 nasid_t compact_to_nasid_node[MAX_COMPACT_NODES]; 46 cnodeid_t cpuid_to_compact_node[MAXCPUS]; 47 48 EXPORT_SYMBOL(nasid_to_compact_node); 49 50 struct cpuinfo_ip27 sn_cpu_info[NR_CPUS]; 51 EXPORT_SYMBOL_GPL(sn_cpu_info); 52 53 extern void pcibr_setup(cnodeid_t); 54 55 static void per_hub_init(cnodeid_t cnode) 56 { 57 struct hub_data *hub = hub_data(cnode); 58 nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode); 59 60 cpumask_set_cpu(smp_processor_id(), &hub->h_cpus); 61 62 if (test_and_set_bit(cnode, hub_init_mask)) 63 return; 64 /* 65 * Set CRB timeout at 5ms, (< PI timeout of 10ms) 66 */ 67 REMOTE_HUB_S(nasid, IIO_ICTP, 0x800); 68 REMOTE_HUB_S(nasid, IIO_ICTO, 0xff); 69 70 hub_rtc_init(cnode); 71 72 #ifdef CONFIG_REPLICATE_EXHANDLERS 73 /* 74 * If this is not a headless node initialization, 75 * copy over the caliased exception handlers. 76 */ 77 if (get_compact_nodeid() == cnode) { 78 extern char except_vec2_generic, except_vec3_generic; 79 extern void build_tlb_refill_handler(void); 80 81 memcpy((void *)(CKSEG0 + 0x100), &except_vec2_generic, 0x80); 82 memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x80); 83 build_tlb_refill_handler(); 84 memcpy((void *)(CKSEG0 + 0x100), (void *) CKSEG0, 0x80); 85 memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x100); 86 __flush_cache_all(); 87 } 88 #endif 89 } 90 91 void per_cpu_init(void) 92 { 93 int cpu = smp_processor_id(); 94 int slice = LOCAL_HUB_L(PI_CPU_NUM); 95 cnodeid_t cnode = get_compact_nodeid(); 96 struct hub_data *hub = hub_data(cnode); 97 98 if (test_and_set_bit(slice, &hub->slice_map)) 99 return; 100 101 clear_c0_status(ST0_IM); 102 103 per_hub_init(cnode); 104 105 cpu_time_init(); 106 install_ipi(); 107 108 /* Install our NMI handler if symmon hasn't installed one. */ 109 install_cpu_nmi_handler(cputoslice(cpu)); 110 111 enable_percpu_irq(IP27_HUB_PEND0_IRQ, IRQ_TYPE_NONE); 112 enable_percpu_irq(IP27_HUB_PEND1_IRQ, IRQ_TYPE_NONE); 113 } 114 115 /* 116 * get_nasid() returns the physical node id number of the caller. 117 */ 118 nasid_t 119 get_nasid(void) 120 { 121 return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK) 122 >> NSRI_NODEID_SHFT); 123 } 124 125 /* 126 * Map the physical node id to a virtual node id (virtual node ids are contiguous). 127 */ 128 cnodeid_t get_compact_nodeid(void) 129 { 130 return NASID_TO_COMPACT_NODEID(get_nasid()); 131 } 132 133 extern void ip27_reboot_setup(void); 134 135 void __init plat_mem_setup(void) 136 { 137 u64 p, e, n_mode; 138 nasid_t nid; 139 140 ip27_reboot_setup(); 141 142 /* 143 * hub_rtc init and cpu clock intr enabled for later calibrate_delay. 144 */ 145 nid = get_nasid(); 146 printk("IP27: Running on node %d.\n", nid); 147 148 p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1; 149 e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1; 150 printk("Node %d has %s primary CPU%s.\n", nid, 151 p ? "a" : "no", 152 e ? ", CPU is running" : ""); 153 154 p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1; 155 e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1; 156 printk("Node %d has %s secondary CPU%s.\n", nid, 157 p ? "a" : "no", 158 e ? ", CPU is running" : ""); 159 160 /* 161 * Try to catch kernel missconfigurations and give user an 162 * indication what option to select. 163 */ 164 n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK; 165 printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M'); 166 #ifdef CONFIG_SGI_SN_N_MODE 167 if (!n_mode) 168 panic("Kernel compiled for M mode."); 169 #else 170 if (n_mode) 171 panic("Kernel compiled for N mode."); 172 #endif 173 174 ioport_resource.start = 0; 175 ioport_resource.end = ~0UL; 176 set_io_port_base(IO_BASE); 177 } 178