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/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/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 41static DECLARE_BITMAP(hub_init_mask, MAX_COMPACT_NODES); 42nasid_t master_nasid = INVALID_NASID; 43 44cnodeid_t nasid_to_compact_node[MAX_NASIDS]; 45nasid_t compact_to_nasid_node[MAX_COMPACT_NODES]; 46cnodeid_t cpuid_to_compact_node[MAXCPUS]; 47 48EXPORT_SYMBOL(nasid_to_compact_node); 49 50struct cpuinfo_ip27 sn_cpu_info[NR_CPUS]; 51EXPORT_SYMBOL_GPL(sn_cpu_info); 52 53extern void pcibr_setup(cnodeid_t); 54 55extern void xtalk_probe_node(cnodeid_t nid); 56 57static void __cpuinit 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 113void __cpuinit 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 */ 150nasid_t 151get_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 */ 160cnodeid_t get_compact_nodeid(void) 161{ 162 return NASID_TO_COMPACT_NODEID(get_nasid()); 163} 164 165static inline void ioc3_eth_init(void) 166{ 167 struct ioc3 *ioc3; 168 nasid_t nid; 169 170 nid = get_nasid(); 171 ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base; 172 173 ioc3->eier = 0; 174} 175 176extern void ip27_reboot_setup(void); 177 178void __init plat_mem_setup(void) 179{ 180 hubreg_t p, e, n_mode; 181 nasid_t nid; 182 183 ip27_reboot_setup(); 184 185 /* 186 * hub_rtc init and cpu clock intr enabled for later calibrate_delay. 187 */ 188 nid = get_nasid(); 189 printk("IP27: Running on node %d.\n", nid); 190 191 p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1; 192 e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1; 193 printk("Node %d has %s primary CPU%s.\n", nid, 194 p ? "a" : "no", 195 e ? ", CPU is running" : ""); 196 197 p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1; 198 e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1; 199 printk("Node %d has %s secondary CPU%s.\n", nid, 200 p ? "a" : "no", 201 e ? ", CPU is running" : ""); 202 203 /* 204 * Try to catch kernel missconfigurations and give user an 205 * indication what option to select. 206 */ 207 n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK; 208 printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M'); 209#ifdef CONFIG_SGI_SN_N_MODE 210 if (!n_mode) 211 panic("Kernel compiled for M mode."); 212#else 213 if (n_mode) 214 panic("Kernel compiled for N mode."); 215#endif 216 217 ioc3_eth_init(); 218 per_cpu_init(); 219 220 set_io_port_base(IO_BASE); 221} 222