1 /* $NetBSD: machdep.c,v 1.22 2024/03/05 14:15:32 thorpej Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 5 * Copyright (C) 1995, 1996 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.22 2024/03/05 14:15:32 thorpej Exp $"); 36 37 #include "opt_compat_netbsd.h" 38 39 #include <sys/param.h> 40 #include <sys/buf.h> 41 #include <sys/bus.h> 42 #include <sys/conf.h> 43 #include <sys/device.h> 44 #include <sys/exec.h> 45 #include <sys/extent.h> 46 #include <sys/intr.h> 47 #include <sys/kernel.h> 48 #include <sys/mbuf.h> 49 #include <sys/mount.h> 50 #include <sys/msgbuf.h> 51 #include <sys/proc.h> 52 #include <sys/reboot.h> 53 #include <sys/syscallargs.h> 54 #include <sys/sysctl.h> 55 #include <sys/syslog.h> 56 #include <sys/systm.h> 57 58 #include <uvm/uvm_extern.h> 59 60 #include <machine/autoconf.h> 61 #include <machine/powerpc.h> 62 63 #include <powerpc/pmap.h> 64 #include <powerpc/trap.h> 65 66 #include <powerpc/oea/bat.h> 67 #include <powerpc/pic/picvar.h> 68 #include <powerpc/include/pio.h> 69 70 #include <dev/pci/pcivar.h> 71 #include <dev/ic/ibm82660reg.h> 72 73 #include <dev/cons.h> 74 75 void initppc(u_long, u_long, u_int, void *); 76 void dumpsys(void); 77 vaddr_t prep_intr_reg; /* PReP interrupt vector register */ 78 uint32_t prep_intr_reg_off; 79 80 #define OFMEMREGIONS 32 81 struct mem_region physmemr[OFMEMREGIONS], availmemr[OFMEMREGIONS]; 82 83 paddr_t avail_end; /* XXX temporary */ 84 struct pic_ops *isa_pic; 85 int isa_pcmciamask = 0x8b28; 86 87 void 88 initppc(u_long startkernel, u_long endkernel, u_int args, void *btinfo) 89 { 90 91 uint32_t sa, ea, banks; 92 u_long memsize = 0; 93 pcitag_t tag; 94 95 /* 96 * Set memory region by reading the memory size from the PCI 97 * host bridge. 98 */ 99 100 tag = genppc_pci_indirect_make_tag(NULL, 0, 0, 0); 101 102 out32rb(PCI_MODE1_ADDRESS_REG, tag | IBM_82660_MEM_BANK0_START); 103 sa = in32rb(PCI_MODE1_DATA_REG); 104 105 out32rb(PCI_MODE1_ADDRESS_REG, tag | IBM_82660_MEM_BANK0_END); 106 ea = in32rb(PCI_MODE1_DATA_REG); 107 108 /* Which memory banks are enabled? */ 109 out32rb(PCI_MODE1_ADDRESS_REG, tag | IBM_82660_MEM_BANK_ENABLE); 110 banks = in32rb(PCI_MODE1_DATA_REG) & 0xFF; 111 112 /* Reset the register for the next call. */ 113 out32rb(PCI_MODE1_ADDRESS_REG, 0); 114 115 if (banks & IBM_82660_MEM_BANK0_ENABLED) 116 memsize += IBM_82660_BANK0_ADDR(ea) - IBM_82660_BANK0_ADDR(sa) + 1; 117 118 if (banks & IBM_82660_MEM_BANK1_ENABLED) 119 memsize += IBM_82660_BANK1_ADDR(ea) - IBM_82660_BANK1_ADDR(sa) + 1; 120 121 if (banks & IBM_82660_MEM_BANK2_ENABLED) 122 memsize += IBM_82660_BANK2_ADDR(ea) - IBM_82660_BANK2_ADDR(sa) + 1; 123 124 if (banks & IBM_82660_MEM_BANK3_ENABLED) 125 memsize += IBM_82660_BANK3_ADDR(ea) - IBM_82660_BANK3_ADDR(sa) + 1; 126 127 memsize <<= 20; 128 129 physmemr[0].start = 0; 130 physmemr[0].size = memsize & ~PGOFSET; 131 availmemr[0].start = (endkernel + PGOFSET) & ~PGOFSET; 132 availmemr[0].size = memsize - availmemr[0].start; 133 134 avail_end = physmemr[0].start + physmemr[0].size; /* XXX temporary */ 135 136 /* 137 * Set CPU clock 138 */ 139 { 140 extern u_long ticks_per_sec, ns_per_tick; 141 142 ticks_per_sec = 16666666; /* hardcoded */ 143 ns_per_tick = 1000000000 / ticks_per_sec; 144 } 145 146 /* 147 * boothowto 148 */ 149 boothowto = 0; /* XXX - should make this an option */ 150 151 prep_initppc(startkernel, endkernel, args, 0); 152 } 153 154 /* 155 * Machine dependent startup code. 156 */ 157 void 158 cpu_startup(void) 159 { 160 /* 161 * Mapping PReP interrupt vector register. 162 */ 163 prep_intr_reg = (vaddr_t) mapiodev(PREP_INTR_REG, PAGE_SIZE, false); 164 if (!prep_intr_reg) 165 panic("startup: no room for interrupt register"); 166 prep_intr_reg_off = INTR_VECTOR_REG; 167 168 /* 169 * Do common startup. 170 */ 171 oea_startup("IBM NetworkStation 1000 (8362-XXX)"); 172 173 pic_init(); 174 isa_pic = setup_prepivr(PIC_IVR_IBM); 175 176 oea_install_extint(pic_ext_intr); 177 178 /* 179 * Now allow hardware interrupts. 180 */ 181 { 182 int msr; 183 184 splraise(-1); 185 __asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0" 186 : "=r"(msr) : "K"(PSL_EE)); 187 } 188 189 /* 190 * Now safe for bus space allocation to use malloc. 191 */ 192 bus_space_mallocok(); 193 } 194 195 /* 196 * Halt or reboot the machine after syncing/dumping according to howto. 197 */ 198 void 199 cpu_reboot(int howto, char *what) 200 { 201 static int syncing; 202 203 if (cold) { 204 howto |= RB_HALT; 205 goto halt_sys; 206 } 207 208 boothowto = howto; 209 if ((howto & RB_NOSYNC) == 0 && syncing == 0) { 210 syncing = 1; 211 vfs_shutdown(); /* sync */ 212 } 213 214 /* Disable intr */ 215 splhigh(); 216 217 /* Do dump if requested */ 218 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 219 oea_dumpsys(); 220 221 halt_sys: 222 doshutdownhooks(); 223 224 pmf_system_shutdown(boothowto); 225 226 if (howto & RB_HALT) { 227 aprint_normal("\n"); 228 aprint_normal("The operating system has halted.\n"); 229 aprint_normal("Please press any key to reboot.\n\n"); 230 cnpollc(1); /* for proper keyboard command handling */ 231 cngetc(); 232 cnpollc(0); 233 } 234 235 aprint_normal("rebooting...\n\n"); 236 237 238 { 239 int msr; 240 u_char reg; 241 242 __asm volatile("mfmsr %0" : "=r"(msr)); 243 msr |= PSL_IP; 244 __asm volatile("mtmsr %0" :: "r"(msr)); 245 246 reg = *(volatile u_char *)(PREP_BUS_SPACE_IO + 0x92); 247 reg &= ~1UL; 248 *(volatile u_char *)(PREP_BUS_SPACE_IO + 0x92) = reg; 249 250 __asm volatile("sync; eieio" ::: "memory"); 251 252 reg = *(volatile u_char *)(PREP_BUS_SPACE_IO + 0x92); 253 reg |= 1; 254 *(volatile u_char *)(PREP_BUS_SPACE_IO + 0x92) = reg; 255 256 __asm volatile("sync; eieio" ::: "memory"); 257 } 258 259 for (;;) 260 continue; 261 /* NOTREACHED */ 262 } 263
Indexes created Fri Sep 26 20:09:58 GMT 2025