machdep.c revision 1.2
1 /* $NetBSD: machdep.c,v 1.2 2024/01/21 01:41:54 jmcneill Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2024 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Lennart Augustsson (lennart (at) augustsson.net) at Sandburst Corp. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 34 * Copyright (C) 1995, 1996 TooLs GmbH. 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by TooLs GmbH. 48 * 4. The name of TooLs GmbH may not be used to endorse or promote products 49 * derived from this software without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 52 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 53 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 54 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 56 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 57 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 58 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 59 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 60 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 61 */ 62 63 #define _POWERPC_BUS_DMA_PRIVATE 64 65 #include <sys/cdefs.h> 66 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.2 2024/01/21 01:41:54 jmcneill Exp $"); 67 68 #include "opt_compat_netbsd.h" 69 #include "opt_ddb.h" 70 #include "opt_ddbparam.h" 71 #include "opt_inet.h" 72 #include "opt_ns.h" 73 #include "opt_oea.h" 74 75 #include <sys/param.h> 76 #include <sys/buf.h> 77 #include <sys/bus.h> 78 #include <sys/conf.h> 79 #include <sys/device.h> 80 #include <sys/exec.h> 81 #include <sys/extent.h> 82 #include <sys/intr.h> 83 #include <sys/kernel.h> 84 #include <sys/kgdb.h> 85 #include <sys/ksyms.h> 86 #include <sys/mbuf.h> 87 #include <sys/mount.h> 88 #include <sys/msgbuf.h> 89 #include <sys/proc.h> 90 #include <sys/reboot.h> 91 #include <sys/syscallargs.h> 92 #include <sys/sysctl.h> 93 #include <sys/syslog.h> 94 #include <sys/systm.h> 95 96 #include <uvm/uvm_extern.h> 97 98 #include <machine/powerpc.h> 99 #include <machine/wii.h> 100 101 #include <powerpc/bus_funcs.h> 102 #include <powerpc/db_machdep.h> 103 #include <powerpc/pio.h> 104 #include <powerpc/pmap.h> 105 #include <powerpc/spr.h> 106 #include <powerpc/trap.h> 107 108 #include <powerpc/oea/bat.h> 109 #include <powerpc/oea/spr.h> 110 #include <powerpc/pic/picvar.h> 111 112 #include <ddb/db_extern.h> 113 114 #include <dev/wscons/wsconsio.h> 115 #include <dev/wscons/wsdisplayvar.h> 116 #include <dev/rasops/rasops.h> 117 #include <dev/wsfont/wsfont.h> 118 #include <dev/wscons/wsdisplay_vconsvar.h> 119 120 #include <dev/usb/ukbdvar.h> 121 122 #include "ksyms.h" 123 #include "ukbd.h" 124 125 #define IBM750CL_SPR_HID4 1011 126 #define L2_CCFI 0x00100000 /* L2 complete castout prior 127 * to L2 flash invalidate. 128 */ 129 130 extern u_int l2cr_config; 131 132 struct powerpc_bus_space wii_mem_tag = { 133 .pbs_flags = _BUS_SPACE_BIG_ENDIAN | 134 _BUS_SPACE_MEM_TYPE, 135 .pbs_offset = 0, 136 .pbs_base = 0x0c000000, 137 .pbs_limit = 0x0dffffff, 138 .pbs_extent = NULL, 139 }; 140 141 static char ex_storage[1][EXTENT_FIXED_STORAGE_SIZE(EXTMAP_RANGES)] 142 __attribute__((aligned(8))); 143 144 static bus_addr_t 145 wii_dma_phys_to_bus_mem(bus_dma_tag_t t, bus_addr_t addr) 146 { 147 return addr; 148 } 149 150 static bus_addr_t 151 wii_dma_bus_mem_to_phys(bus_dma_tag_t t, bus_addr_t addr) 152 { 153 return addr; 154 } 155 156 static int 157 wii_mem2_dmamem_alloc(bus_dma_tag_t t, bus_size_t size, bus_size_t alignment, 158 bus_size_t boundary, bus_dma_segment_t *segs, int nsegs, int *rsegs, 159 int flags) 160 { 161 struct mem_region *mem, *avail; 162 163 /* Restrict memory used for DMA to ranges in MEM2 */ 164 mem_regions(&mem, &avail); 165 if (mem[1].size == 0) { 166 return ENOMEM; 167 } 168 169 return _bus_dmamem_alloc_range(t, size, alignment, boundary, segs, 170 nsegs, rsegs, flags, mem[1].start, 171 mem[1].start + mem[1].size - PAGE_SIZE - 1); 172 } 173 174 struct powerpc_bus_dma_tag wii_bus_dma_tag = { 175 0, /* _bounce_thresh */ 176 _bus_dmamap_create, 177 _bus_dmamap_destroy, 178 _bus_dmamap_load, 179 _bus_dmamap_load_mbuf, 180 _bus_dmamap_load_uio, 181 _bus_dmamap_load_raw, 182 _bus_dmamap_unload, 183 _bus_dmamap_sync, 184 _bus_dmamem_alloc, 185 _bus_dmamem_free, 186 _bus_dmamem_map, 187 _bus_dmamem_unmap, 188 _bus_dmamem_mmap, 189 wii_dma_phys_to_bus_mem, 190 wii_dma_bus_mem_to_phys, 191 }; 192 193 struct powerpc_bus_dma_tag wii_mem2_bus_dma_tag = { 194 0, /* _bounce_thresh */ 195 _bus_dmamap_create, 196 _bus_dmamap_destroy, 197 _bus_dmamap_load, 198 _bus_dmamap_load_mbuf, 199 _bus_dmamap_load_uio, 200 _bus_dmamap_load_raw, 201 _bus_dmamap_unload, 202 _bus_dmamap_sync, 203 wii_mem2_dmamem_alloc, 204 _bus_dmamem_free, 205 _bus_dmamem_map, 206 _bus_dmamem_unmap, 207 _bus_dmamem_mmap, 208 wii_dma_phys_to_bus_mem, 209 wii_dma_bus_mem_to_phys, 210 }; 211 212 213 /* 214 * Global variables used here and there 215 */ 216 struct mem_region physmemr[3], availmemr[3]; 217 218 void initppc(u_int, u_int, u_int, void *); /* Called from locore */ 219 void wii_dolphin_elf_loader_id(void); 220 221 static void wii_setup(void); 222 static void init_decrementer(void); 223 224 void 225 initppc(u_int startkernel, u_int endkernel, u_int args, void *btinfo) 226 { 227 extern u_long ticks_per_sec; 228 extern unsigned char edata[], end[]; 229 uint32_t mem2_size; 230 register_t scratch; 231 232 memset(&edata, 0, end - edata); /* clear BSS */ 233 234 mem2_size = in32(GLOBAL_MEM2_SIZE); 235 236 /* MEM1 24MB 1T-SRAM */ 237 physmemr[0].start = WII_MEM1_BASE; 238 physmemr[0].size = WII_MEM1_SIZE; 239 240 /* MEM2 64MB GDDR3 */ 241 physmemr[1].start = WII_MEM2_BASE; 242 physmemr[1].size = mem2_size; 243 244 physmemr[2].size = 0; 245 246 /* MEM1 available memory */ 247 availmemr[0].start = ((endkernel & ~0x80000000) + PGOFSET) & ~PGOFSET; 248 availmemr[0].size = physmemr[0].size - availmemr[0].start; 249 /* External framebuffer is at the end of MEM1 */ 250 availmemr[0].size -= XFB_SIZE; 251 252 /* MEM2 available memory */ 253 availmemr[1].start = physmemr[1].start; 254 availmemr[1].size = physmemr[1].size; 255 if (mem2_size != 0) { 256 /* DSP uses 16KB at the start of MEM2 */ 257 availmemr[1].start += DSP_SIZE; 258 availmemr[1].size -= DSP_SIZE; 259 /* IPC and Starlet use memory at the end of MEM2 */ 260 availmemr[1].size -= IPC_SIZE; 261 availmemr[1].size -= ARM_SIZE; 262 } 263 264 availmemr[2].size = 0; 265 266 #ifdef BOOTHOWTO 267 /* 268 * boothowto 269 */ 270 boothowto = BOOTHOWTO; 271 #endif 272 273 /* HID4[L2_CCFI] must be set to 1 for correct operation of L2 cache */ 274 mtspr(IBM750CL_SPR_HID4, mfspr(IBM750CL_SPR_HID4) | L2_CCFI); 275 276 /* Configure L2 cache */ 277 l2cr_config = L2CR_L2E | L2CR_L2PE; 278 279 if (bus_space_init(&wii_mem_tag, "iomem", 280 ex_storage[0], sizeof(ex_storage[0]))) { 281 panic("bus_space_init failed"); 282 } 283 284 /* 285 * Initialize the BAT registers 286 */ 287 oea_batinit( 288 WII_IOMEM_BASE, BAT_BL_32M, 289 0); 290 291 /* 292 * Set up trap vectors 293 */ 294 oea_init(NULL); 295 296 /* 297 * Get CPU clock 298 */ 299 ticks_per_sec = TIMEBASE_FREQ_HZ; 300 cpu_timebase = ticks_per_sec; 301 302 wii_setup(); 303 304 uvm_md_init(); 305 306 /* 307 * Initialize pmap module. 308 */ 309 pmap_bootstrap(startkernel, endkernel); 310 311 /* Now enable translation (and machine checks/recoverable interrupts) */ 312 __asm __volatile ("sync; mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 313 : "=r"(scratch) 314 : "K"(PSL_IR|PSL_DR|PSL_ME|PSL_RI)); 315 316 /* 317 * Setup decrementer 318 */ 319 init_decrementer(); 320 } 321 322 void 323 mem_regions(struct mem_region **mem, struct mem_region **avail) 324 { 325 *mem = physmemr; 326 *avail = availmemr; 327 } 328 329 /* 330 * Machine dependent startup code. 331 */ 332 void 333 cpu_startup(void) 334 { 335 extern void pi_init_intr(void); 336 337 oea_startup(NULL); 338 339 /* 340 * Now that we have VM, malloc()s are OK in bus_space. 341 */ 342 bus_space_mallocok(); 343 344 /* Set up interrupt controller */ 345 pic_init(); 346 pi_init_intr(); 347 oea_install_extint(pic_ext_intr); 348 } 349 350 /* 351 * No early console support. 352 */ 353 void 354 consinit(void) 355 { 356 #if NUKBD > 0 357 ukbd_cnattach(); 358 #endif 359 } 360 361 /* 362 * Halt or reboot the machine after syncing/dumping according to howto. 363 */ 364 void 365 cpu_reboot(int howto, char *what) 366 { 367 static int syncing; 368 extern void disable_intr(void); 369 370 boothowto = howto; 371 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 372 syncing = 1; 373 vfs_shutdown(); /* sync */ 374 resettodr(); /* set wall clock */ 375 } 376 splhigh(); 377 if (!cold && (howto & RB_DUMP)) { 378 oea_dumpsys(); 379 } 380 pmf_system_shutdown(boothowto); 381 doshutdownhooks(); 382 383 disable_intr(); 384 385 /* Force halt on panic to capture the cause on screen. */ 386 if (panicstr != NULL) { 387 howto |= RB_HALT; 388 } 389 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 390 printf("power off\n\n"); 391 out32(HW_GPIOB_OUT, in32(HW_GPIOB_OUT) | __BIT(GPIO_SHUTDOWN)); 392 delay(100000); 393 printf("power off failed!\n\n"); 394 } 395 if (howto & RB_HALT) { 396 printf("halted\n\n"); 397 while (1); 398 } 399 400 printf("rebooting\n\n"); 401 out32(HW_RESETS, in32(HW_RESETS) & ~RSTBINB); 402 while (1); 403 } 404 405 static void 406 wii_setup(void) 407 { 408 /* Turn on the drive slot LED. */ 409 out32(HW_GPIOB_OUT, in32(HW_GPIOB_OUT) | __BIT(GPIO_SLOT_LED)); 410 411 /* Enable PPC access to SHUTDOWN GPIO. */ 412 out32(HW_GPIO_OWNER, in32(HW_GPIO_OWNER) | __BIT(GPIO_SHUTDOWN)); 413 } 414 415 static void 416 init_decrementer(void) 417 { 418 extern uint32_t ns_per_tick; 419 extern uint32_t ticks_per_intr; 420 extern u_long ticks_per_sec; 421 int scratch, msr; 422 423 KASSERT(ticks_per_sec != 0); 424 425 __asm volatile ("mfmsr %0; andi. %1,%0,%2; mtmsr %1" 426 : "=r"(msr), "=r"(scratch) : "K"((u_short)~PSL_EE)); 427 ns_per_tick = 1000000000 / ticks_per_sec; 428 ticks_per_intr = ticks_per_sec / hz; 429 cpu_timebase = ticks_per_sec; 430 431 curcpu()->ci_lasttb = mftbl(); 432 433 mtspr(SPR_DEC, ticks_per_intr); 434 mtmsr(msr); 435 } 436
Indexes created Mon Oct 20 11:09:49 GMT 2025