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 extern void pcibr_setup(cnodeid_t); 51 52 extern void xtalk_probe_node(cnodeid_t nid); 53 54 static void __init per_hub_init(cnodeid_t cnode) 55 { 56 struct hub_data *hub = hub_data(cnode); 57 nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode); 58 int i; 59 60 cpu_set(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 xtalk_probe_node(cnode); 72 73 #ifdef CONFIG_REPLICATE_EXHANDLERS 74 /* 75 * If this is not a headless node initialization, 76 * copy over the caliased exception handlers. 77 */ 78 if (get_compact_nodeid() == cnode) { 79 extern char except_vec2_generic, except_vec3_generic; 80 extern void build_tlb_refill_handler(void); 81 82 memcpy((void *)(CKSEG0 + 0x100), &except_vec2_generic, 0x80); 83 memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x80); 84 build_tlb_refill_handler(); 85 memcpy((void *)(CKSEG0 + 0x100), (void *) CKSEG0, 0x80); 86 memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x100); 87 __flush_cache_all(); 88 } 89 #endif 90 91 /* 92 * Some interrupts are reserved by hardware or by software convention. 93 * Mark these as reserved right away so they won't be used accidently 94 * later. 95 */ 96 for (i = 0; i <= BASE_PCI_IRQ; i++) { 97 __set_bit(i, hub->irq_alloc_mask); 98 LOCAL_HUB_CLR_INTR(INT_PEND0_BASELVL + i); 99 } 100 101 __set_bit(IP_PEND0_6_63, hub->irq_alloc_mask); 102 LOCAL_HUB_S(PI_INT_PEND_MOD, IP_PEND0_6_63); 103 104 for (i = NI_BRDCAST_ERR_A; i <= MSC_PANIC_INTR; i++) { 105 __set_bit(i, hub->irq_alloc_mask); 106 LOCAL_HUB_CLR_INTR(INT_PEND1_BASELVL + i); 107 } 108 } 109 110 void __init per_cpu_init(void) 111 { 112 int cpu = smp_processor_id(); 113 int slice = LOCAL_HUB_L(PI_CPU_NUM); 114 cnodeid_t cnode = get_compact_nodeid(); 115 struct hub_data *hub = hub_data(cnode); 116 struct slice_data *si = hub->slice + slice; 117 int i; 118 119 if (test_and_set_bit(slice, &hub->slice_map)) 120 return; 121 122 clear_c0_status(ST0_IM); 123 124 per_hub_init(cnode); 125 126 for (i = 0; i < LEVELS_PER_SLICE; i++) 127 si->level_to_irq[i] = -1; 128 129 /* 130 * We use this so we can find the local hub's data as fast as only 131 * possible. 132 */ 133 cpu_data[cpu].data = si; 134 135 cpu_time_init(); 136 install_ipi(); 137 138 /* Install our NMI handler if symmon hasn't installed one. */ 139 install_cpu_nmi_handler(cputoslice(cpu)); 140 141 set_c0_status(SRB_DEV0 | SRB_DEV1); 142 } 143 144 /* 145 * get_nasid() returns the physical node id number of the caller. 146 */ 147 nasid_t 148 get_nasid(void) 149 { 150 return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK) 151 >> NSRI_NODEID_SHFT); 152 } 153 154 /* 155 * Map the physical node id to a virtual node id (virtual node ids are contiguous). 156 */ 157 cnodeid_t get_compact_nodeid(void) 158 { 159 return NASID_TO_COMPACT_NODEID(get_nasid()); 160 } 161 162 /* Extracted from the IOC3 meta driver. FIXME. */ 163 static inline void ioc3_sio_init(void) 164 { 165 struct ioc3 *ioc3; 166 nasid_t nid; 167 long loops; 168 169 nid = get_nasid(); 170 ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base; 171 172 ioc3->sscr_a = 0; /* PIO mode for uarta. */ 173 ioc3->sscr_b = 0; /* PIO mode for uartb. */ 174 ioc3->sio_iec = ~0; 175 ioc3->sio_ies = (SIO_IR_SA_INT | SIO_IR_SB_INT); 176 177 loops=1000000; while(loops--); 178 ioc3->sregs.uarta.iu_fcr = 0; 179 ioc3->sregs.uartb.iu_fcr = 0; 180 loops=1000000; while(loops--); 181 } 182 183 static inline void ioc3_eth_init(void) 184 { 185 struct ioc3 *ioc3; 186 nasid_t nid; 187 188 nid = get_nasid(); 189 ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base; 190 191 ioc3->eier = 0; 192 } 193 194 extern void ip27_time_init(void); 195 extern void ip27_reboot_setup(void); 196 197 void __init plat_mem_setup(void) 198 { 199 hubreg_t p, e, n_mode; 200 nasid_t nid; 201 202 ip27_reboot_setup(); 203 204 /* 205 * hub_rtc init and cpu clock intr enabled for later calibrate_delay. 206 */ 207 nid = get_nasid(); 208 printk("IP27: Running on node %d.\n", nid); 209 210 p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1; 211 e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1; 212 printk("Node %d has %s primary CPU%s.\n", nid, 213 p ? "a" : "no", 214 e ? ", CPU is running" : ""); 215 216 p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1; 217 e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1; 218 printk("Node %d has %s secondary CPU%s.\n", nid, 219 p ? "a" : "no", 220 e ? ", CPU is running" : ""); 221 222 /* 223 * Try to catch kernel missconfigurations and give user an 224 * indication what option to select. 225 */ 226 n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK; 227 printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M'); 228 #ifdef CONFIG_SGI_SN_N_MODE 229 if (!n_mode) 230 panic("Kernel compiled for M mode."); 231 #else 232 if (n_mode) 233 panic("Kernel compiled for N mode."); 234 #endif 235 236 ioc3_sio_init(); 237 ioc3_eth_init(); 238 per_cpu_init(); 239 240 set_io_port_base(IO_BASE); 241 242 board_time_init = ip27_time_init; 243 } 244