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/mm.h> 13 #include <linux/module.h> 14 #include <linux/cpumask.h> 15 #include <asm/cpu.h> 16 #include <asm/io.h> 17 #include <asm/pgtable.h> 18 #include <asm/time.h> 19 #include <asm/sn/types.h> 20 #include <asm/sn/sn0/addrs.h> 21 #include <asm/sn/sn0/hubni.h> 22 #include <asm/sn/sn0/hubio.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/hub.h> 28 #include <asm/sn/intr.h> 29 #include <asm/current.h> 30 #include <asm/smp.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 extern void xtalk_probe_node(cnodeid_t nid); 56 57 static void __init per_hub_init(cnodeid_t cnode) 58 { 59 struct hub_data *hub = hub_data(cnode); 60 nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode); 61 int i; 62 63 cpu_set(smp_processor_id(), hub->h_cpus); 64 65 if (test_and_set_bit(cnode, hub_init_mask)) 66 return; 67 /* 68 * Set CRB timeout at 5ms, (< PI timeout of 10ms) 69 */ 70 REMOTE_HUB_S(nasid, IIO_ICTP, 0x800); 71 REMOTE_HUB_S(nasid, IIO_ICTO, 0xff); 72 73 hub_rtc_init(cnode); 74 xtalk_probe_node(cnode); 75 76 #ifdef CONFIG_REPLICATE_EXHANDLERS 77 /* 78 * If this is not a headless node initialization, 79 * copy over the caliased exception handlers. 80 */ 81 if (get_compact_nodeid() == cnode) { 82 extern char except_vec2_generic, except_vec3_generic; 83 extern void build_tlb_refill_handler(void); 84 85 memcpy((void *)(CKSEG0 + 0x100), &except_vec2_generic, 0x80); 86 memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x80); 87 build_tlb_refill_handler(); 88 memcpy((void *)(CKSEG0 + 0x100), (void *) CKSEG0, 0x80); 89 memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x100); 90 __flush_cache_all(); 91 } 92 #endif 93 94 /* 95 * Some interrupts are reserved by hardware or by software convention. 96 * Mark these as reserved right away so they won't be used accidently 97 * later. 98 */ 99 for (i = 0; i <= BASE_PCI_IRQ; i++) { 100 __set_bit(i, hub->irq_alloc_mask); 101 LOCAL_HUB_CLR_INTR(INT_PEND0_BASELVL + i); 102 } 103 104 __set_bit(IP_PEND0_6_63, hub->irq_alloc_mask); 105 LOCAL_HUB_S(PI_INT_PEND_MOD, IP_PEND0_6_63); 106 107 for (i = NI_BRDCAST_ERR_A; i <= MSC_PANIC_INTR; i++) { 108 __set_bit(i, hub->irq_alloc_mask); 109 LOCAL_HUB_CLR_INTR(INT_PEND1_BASELVL + i); 110 } 111 } 112 113 void __init per_cpu_init(void) 114 { 115 int cpu = smp_processor_id(); 116 int slice = LOCAL_HUB_L(PI_CPU_NUM); 117 cnodeid_t cnode = get_compact_nodeid(); 118 struct hub_data *hub = hub_data(cnode); 119 struct slice_data *si = hub->slice + slice; 120 int i; 121 122 if (test_and_set_bit(slice, &hub->slice_map)) 123 return; 124 125 clear_c0_status(ST0_IM); 126 127 per_hub_init(cnode); 128 129 for (i = 0; i < LEVELS_PER_SLICE; i++) 130 si->level_to_irq[i] = -1; 131 132 /* 133 * We use this so we can find the local hub's data as fast as only 134 * possible. 135 */ 136 cpu_data[cpu].data = si; 137 138 cpu_time_init(); 139 install_ipi(); 140 141 /* Install our NMI handler if symmon hasn't installed one. */ 142 install_cpu_nmi_handler(cputoslice(cpu)); 143 144 set_c0_status(SRB_DEV0 | SRB_DEV1); 145 } 146 147 /* 148 * get_nasid() returns the physical node id number of the caller. 149 */ 150 nasid_t 151 get_nasid(void) 152 { 153 return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK) 154 >> NSRI_NODEID_SHFT); 155 } 156 157 /* 158 * Map the physical node id to a virtual node id (virtual node ids are contiguous). 159 */ 160 cnodeid_t get_compact_nodeid(void) 161 { 162 return NASID_TO_COMPACT_NODEID(get_nasid()); 163 } 164 165 /* Extracted from the IOC3 meta driver. FIXME. */ 166 static inline void ioc3_sio_init(void) 167 { 168 struct ioc3 *ioc3; 169 nasid_t nid; 170 long loops; 171 172 nid = get_nasid(); 173 ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base; 174 175 ioc3->sscr_a = 0; /* PIO mode for uarta. */ 176 ioc3->sscr_b = 0; /* PIO mode for uartb. */ 177 ioc3->sio_iec = ~0; 178 ioc3->sio_ies = (SIO_IR_SA_INT | SIO_IR_SB_INT); 179 180 loops=1000000; while(loops--); 181 ioc3->sregs.uarta.iu_fcr = 0; 182 ioc3->sregs.uartb.iu_fcr = 0; 183 loops=1000000; while(loops--); 184 } 185 186 static inline void ioc3_eth_init(void) 187 { 188 struct ioc3 *ioc3; 189 nasid_t nid; 190 191 nid = get_nasid(); 192 ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base; 193 194 ioc3->eier = 0; 195 } 196 197 extern void ip27_reboot_setup(void); 198 199 void __init plat_mem_setup(void) 200 { 201 hubreg_t p, e, n_mode; 202 nasid_t nid; 203 204 ip27_reboot_setup(); 205 206 /* 207 * hub_rtc init and cpu clock intr enabled for later calibrate_delay. 208 */ 209 nid = get_nasid(); 210 printk("IP27: Running on node %d.\n", nid); 211 212 p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1; 213 e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1; 214 printk("Node %d has %s primary CPU%s.\n", nid, 215 p ? "a" : "no", 216 e ? ", CPU is running" : ""); 217 218 p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1; 219 e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1; 220 printk("Node %d has %s secondary CPU%s.\n", nid, 221 p ? "a" : "no", 222 e ? ", CPU is running" : ""); 223 224 /* 225 * Try to catch kernel missconfigurations and give user an 226 * indication what option to select. 227 */ 228 n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK; 229 printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M'); 230 #ifdef CONFIG_SGI_SN_N_MODE 231 if (!n_mode) 232 panic("Kernel compiled for M mode."); 233 #else 234 if (n_mode) 235 panic("Kernel compiled for N mode."); 236 #endif 237 238 ioc3_sio_init(); 239 ioc3_eth_init(); 240 per_cpu_init(); 241 242 set_io_port_base(IO_BASE); 243 } 244