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/processor.h> 31 #include <asm/mmu_context.h> 32 #include <asm/thread_info.h> 33 #include <asm/sn/launch.h> 34 #include <asm/sn/sn_private.h> 35 #include <asm/sn/sn0/ip27.h> 36 #include <asm/sn/mapped_kernel.h> 37 38 #define CPU_NONE (cpuid_t)-1 39 40 static DECLARE_BITMAP(hub_init_mask, MAX_COMPACT_NODES); 41 nasid_t master_nasid = INVALID_NASID; 42 43 cnodeid_t nasid_to_compact_node[MAX_NASIDS]; 44 nasid_t compact_to_nasid_node[MAX_COMPACT_NODES]; 45 cnodeid_t cpuid_to_compact_node[MAXCPUS]; 46 47 EXPORT_SYMBOL(nasid_to_compact_node); 48 49 struct cpuinfo_ip27 sn_cpu_info[NR_CPUS]; 50 EXPORT_SYMBOL_GPL(sn_cpu_info); 51 52 extern void pcibr_setup(cnodeid_t); 53 54 extern void xtalk_probe_node(cnodeid_t nid); 55 56 static void __cpuinit per_hub_init(cnodeid_t cnode) 57 { 58 struct hub_data *hub = hub_data(cnode); 59 nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode); 60 int i; 61 62 cpu_set(smp_processor_id(), hub->h_cpus); 63 64 if (test_and_set_bit(cnode, hub_init_mask)) 65 return; 66 /* 67 * Set CRB timeout at 5ms, (< PI timeout of 10ms) 68 */ 69 REMOTE_HUB_S(nasid, IIO_ICTP, 0x800); 70 REMOTE_HUB_S(nasid, IIO_ICTO, 0xff); 71 72 hub_rtc_init(cnode); 73 xtalk_probe_node(cnode); 74 75 #ifdef CONFIG_REPLICATE_EXHANDLERS 76 /* 77 * If this is not a headless node initialization, 78 * copy over the caliased exception handlers. 79 */ 80 if (get_compact_nodeid() == cnode) { 81 extern char except_vec2_generic, except_vec3_generic; 82 extern void build_tlb_refill_handler(void); 83 84 memcpy((void *)(CKSEG0 + 0x100), &except_vec2_generic, 0x80); 85 memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x80); 86 build_tlb_refill_handler(); 87 memcpy((void *)(CKSEG0 + 0x100), (void *) CKSEG0, 0x80); 88 memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x100); 89 __flush_cache_all(); 90 } 91 #endif 92 93 /* 94 * Some interrupts are reserved by hardware or by software convention. 95 * Mark these as reserved right away so they won't be used accidently 96 * later. 97 */ 98 for (i = 0; i <= BASE_PCI_IRQ; i++) { 99 __set_bit(i, hub->irq_alloc_mask); 100 LOCAL_HUB_CLR_INTR(INT_PEND0_BASELVL + i); 101 } 102 103 __set_bit(IP_PEND0_6_63, hub->irq_alloc_mask); 104 LOCAL_HUB_S(PI_INT_PEND_MOD, IP_PEND0_6_63); 105 106 for (i = NI_BRDCAST_ERR_A; i <= MSC_PANIC_INTR; i++) { 107 __set_bit(i, hub->irq_alloc_mask); 108 LOCAL_HUB_CLR_INTR(INT_PEND1_BASELVL + i); 109 } 110 } 111 112 void __cpuinit per_cpu_init(void) 113 { 114 int cpu = smp_processor_id(); 115 int slice = LOCAL_HUB_L(PI_CPU_NUM); 116 cnodeid_t cnode = get_compact_nodeid(); 117 struct hub_data *hub = hub_data(cnode); 118 struct slice_data *si = hub->slice + slice; 119 int i; 120 121 if (test_and_set_bit(slice, &hub->slice_map)) 122 return; 123 124 clear_c0_status(ST0_IM); 125 126 per_hub_init(cnode); 127 128 for (i = 0; i < LEVELS_PER_SLICE; i++) 129 si->level_to_irq[i] = -1; 130 131 /* 132 * We use this so we can find the local hub's data as fast as only 133 * possible. 134 */ 135 cpu_data[cpu].data = si; 136 137 cpu_time_init(); 138 install_ipi(); 139 140 /* Install our NMI handler if symmon hasn't installed one. */ 141 install_cpu_nmi_handler(cputoslice(cpu)); 142 143 set_c0_status(SRB_DEV0 | SRB_DEV1); 144 } 145 146 /* 147 * get_nasid() returns the physical node id number of the caller. 148 */ 149 nasid_t 150 get_nasid(void) 151 { 152 return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK) 153 >> NSRI_NODEID_SHFT); 154 } 155 156 /* 157 * Map the physical node id to a virtual node id (virtual node ids are contiguous). 158 */ 159 cnodeid_t get_compact_nodeid(void) 160 { 161 return NASID_TO_COMPACT_NODEID(get_nasid()); 162 } 163 164 /* Extracted from the IOC3 meta driver. FIXME. */ 165 static inline void ioc3_sio_init(void) 166 { 167 struct ioc3 *ioc3; 168 nasid_t nid; 169 long loops; 170 171 nid = get_nasid(); 172 ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base; 173 174 ioc3->sscr_a = 0; /* PIO mode for uarta. */ 175 ioc3->sscr_b = 0; /* PIO mode for uartb. */ 176 ioc3->sio_iec = ~0; 177 ioc3->sio_ies = (SIO_IR_SA_INT | SIO_IR_SB_INT); 178 179 loops=1000000; while(loops--); 180 ioc3->sregs.uarta.iu_fcr = 0; 181 ioc3->sregs.uartb.iu_fcr = 0; 182 loops=1000000; while(loops--); 183 } 184 185 static inline void ioc3_eth_init(void) 186 { 187 struct ioc3 *ioc3; 188 nasid_t nid; 189 190 nid = get_nasid(); 191 ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base; 192 193 ioc3->eier = 0; 194 } 195 196 extern void ip27_reboot_setup(void); 197 198 void __init plat_mem_setup(void) 199 { 200 hubreg_t p, e, n_mode; 201 nasid_t nid; 202 203 ip27_reboot_setup(); 204 205 /* 206 * hub_rtc init and cpu clock intr enabled for later calibrate_delay. 207 */ 208 nid = get_nasid(); 209 printk("IP27: Running on node %d.\n", nid); 210 211 p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1; 212 e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1; 213 printk("Node %d has %s primary CPU%s.\n", nid, 214 p ? "a" : "no", 215 e ? ", CPU is running" : ""); 216 217 p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1; 218 e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1; 219 printk("Node %d has %s secondary CPU%s.\n", nid, 220 p ? "a" : "no", 221 e ? ", CPU is running" : ""); 222 223 /* 224 * Try to catch kernel missconfigurations and give user an 225 * indication what option to select. 226 */ 227 n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK; 228 printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M'); 229 #ifdef CONFIG_SGI_SN_N_MODE 230 if (!n_mode) 231 panic("Kernel compiled for M mode."); 232 #else 233 if (n_mode) 234 panic("Kernel compiled for N mode."); 235 #endif 236 237 ioc3_sio_init(); 238 ioc3_eth_init(); 239 per_cpu_init(); 240 241 set_io_port_base(IO_BASE); 242 } 243