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/config.h> 10 #include <linux/kernel.h> 11 #include <linux/init.h> 12 #include <linux/sched.h> 13 #include <linux/mm.h> 14 #include <linux/module.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/smp.h> 32 #include <asm/processor.h> 33 #include <asm/mmu_context.h> 34 #include <asm/thread_info.h> 35 #include <asm/sn/launch.h> 36 #include <asm/sn/sn_private.h> 37 #include <asm/sn/sn0/ip27.h> 38 #include <asm/sn/mapped_kernel.h> 39 40 #define CPU_NONE (cpuid_t)-1 41 42 static DECLARE_BITMAP(hub_init_mask, MAX_COMPACT_NODES); 43 nasid_t master_nasid = INVALID_NASID; 44 45 cnodeid_t nasid_to_compact_node[MAX_NASIDS]; 46 nasid_t compact_to_nasid_node[MAX_COMPACT_NODES]; 47 cnodeid_t cpuid_to_compact_node[MAXCPUS]; 48 49 EXPORT_SYMBOL(nasid_to_compact_node); 50 51 extern void pcibr_setup(cnodeid_t); 52 53 extern void xtalk_probe_node(cnodeid_t nid); 54 55 static void __init 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 int i; 60 61 cpu_set(smp_processor_id(), hub->h_cpus); 62 63 if (test_and_set_bit(cnode, hub_init_mask)) 64 return; 65 /* 66 * Set CRB timeout at 5ms, (< PI timeout of 10ms) 67 */ 68 REMOTE_HUB_S(nasid, IIO_ICTP, 0x800); 69 REMOTE_HUB_S(nasid, IIO_ICTO, 0xff); 70 71 hub_rtc_init(cnode); 72 xtalk_probe_node(cnode); 73 74 #ifdef CONFIG_REPLICATE_EXHANDLERS 75 /* 76 * If this is not a headless node initialization, 77 * copy over the caliased exception handlers. 78 */ 79 if (get_compact_nodeid() == cnode) { 80 extern char except_vec2_generic, except_vec3_generic; 81 extern void build_tlb_refill_handler(void); 82 83 memcpy((void *)(CKSEG0 + 0x100), &except_vec2_generic, 0x80); 84 memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x80); 85 build_tlb_refill_handler(); 86 memcpy((void *)(CKSEG0 + 0x100), (void *) CKSEG0, 0x80); 87 memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x100); 88 __flush_cache_all(); 89 } 90 #endif 91 92 /* 93 * Some interrupts are reserved by hardware or by software convention. 94 * Mark these as reserved right away so they won't be used accidently 95 * later. 96 */ 97 for (i = 0; i <= BASE_PCI_IRQ; i++) { 98 __set_bit(i, hub->irq_alloc_mask); 99 LOCAL_HUB_CLR_INTR(INT_PEND0_BASELVL + i); 100 } 101 102 __set_bit(IP_PEND0_6_63, hub->irq_alloc_mask); 103 LOCAL_HUB_S(PI_INT_PEND_MOD, IP_PEND0_6_63); 104 105 for (i = NI_BRDCAST_ERR_A; i <= MSC_PANIC_INTR; i++) { 106 __set_bit(i, hub->irq_alloc_mask); 107 LOCAL_HUB_CLR_INTR(INT_PEND1_BASELVL + i); 108 } 109 } 110 111 void __init per_cpu_init(void) 112 { 113 int cpu = smp_processor_id(); 114 int slice = LOCAL_HUB_L(PI_CPU_NUM); 115 cnodeid_t cnode = get_compact_nodeid(); 116 struct hub_data *hub = hub_data(cnode); 117 struct slice_data *si = hub->slice + slice; 118 int i; 119 120 if (test_and_set_bit(slice, &hub->slice_map)) 121 return; 122 123 clear_c0_status(ST0_IM); 124 125 per_hub_init(cnode); 126 127 for (i = 0; i < LEVELS_PER_SLICE; i++) 128 si->level_to_irq[i] = -1; 129 130 /* 131 * We use this so we can find the local hub's data as fast as only 132 * possible. 133 */ 134 cpu_data[cpu].data = si; 135 136 cpu_time_init(); 137 install_ipi(); 138 139 /* Install our NMI handler if symmon hasn't installed one. */ 140 install_cpu_nmi_handler(cputoslice(cpu)); 141 142 set_c0_status(SRB_DEV0 | SRB_DEV1); 143 } 144 145 /* 146 * get_nasid() returns the physical node id number of the caller. 147 */ 148 nasid_t 149 get_nasid(void) 150 { 151 return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK) 152 >> NSRI_NODEID_SHFT); 153 } 154 155 /* 156 * Map the physical node id to a virtual node id (virtual node ids are contiguous). 157 */ 158 cnodeid_t get_compact_nodeid(void) 159 { 160 return NASID_TO_COMPACT_NODEID(get_nasid()); 161 } 162 163 /* Extracted from the IOC3 meta driver. FIXME. */ 164 static inline void ioc3_sio_init(void) 165 { 166 struct ioc3 *ioc3; 167 nasid_t nid; 168 long loops; 169 170 nid = get_nasid(); 171 ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base; 172 173 ioc3->sscr_a = 0; /* PIO mode for uarta. */ 174 ioc3->sscr_b = 0; /* PIO mode for uartb. */ 175 ioc3->sio_iec = ~0; 176 ioc3->sio_ies = (SIO_IR_SA_INT | SIO_IR_SB_INT); 177 178 loops=1000000; while(loops--); 179 ioc3->sregs.uarta.iu_fcr = 0; 180 ioc3->sregs.uartb.iu_fcr = 0; 181 loops=1000000; while(loops--); 182 } 183 184 static inline void ioc3_eth_init(void) 185 { 186 struct ioc3 *ioc3; 187 nasid_t nid; 188 189 nid = get_nasid(); 190 ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base; 191 192 ioc3->eier = 0; 193 } 194 195 extern void ip27_setup_console(void); 196 extern void ip27_time_init(void); 197 extern void ip27_reboot_setup(void); 198 199 void __init plat_setup(void) 200 { 201 hubreg_t p, e, n_mode; 202 nasid_t nid; 203 204 ip27_setup_console(); 205 ip27_reboot_setup(); 206 207 /* 208 * hub_rtc init and cpu clock intr enabled for later calibrate_delay. 209 */ 210 nid = get_nasid(); 211 printk("IP27: Running on node %d.\n", nid); 212 213 p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1; 214 e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1; 215 printk("Node %d has %s primary CPU%s.\n", nid, 216 p ? "a" : "no", 217 e ? ", CPU is running" : ""); 218 219 p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1; 220 e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1; 221 printk("Node %d has %s secondary CPU%s.\n", nid, 222 p ? "a" : "no", 223 e ? ", CPU is running" : ""); 224 225 /* 226 * Try to catch kernel missconfigurations and give user an 227 * indication what option to select. 228 */ 229 n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK; 230 printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M'); 231 #ifdef CONFIG_SGI_SN0_N_MODE 232 if (!n_mode) 233 panic("Kernel compiled for M mode."); 234 #else 235 if (n_mode) 236 panic("Kernel compiled for N mode."); 237 #endif 238 239 ioc3_sio_init(); 240 ioc3_eth_init(); 241 per_cpu_init(); 242 243 set_io_port_base(IO_BASE); 244 245 board_time_init = ip27_time_init; 246 } 247