machdep.c revision 1.7
1 /* $NetBSD: machdep.c,v 1.7 2024/10/13 16:21:37 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 1.7 2024/10/13 16:21:37 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 #ifndef WII_DEFAULT_CMDLINE 126 #define WII_DEFAULT_CMDLINE "root=ld0a" 127 #endif 128 129 #define IBM750CL_SPR_HID4 1011 130 #define L2_CCFI 0x00100000 /* L2 complete castout prior 131 * to L2 flash invalidate. 132 */ 133 134 #define MINI_MEM2_START 0x13f00000 /* Start of reserved MEM2 for MINI */ 135 136 extern u_int l2cr_config; 137 138 struct powerpc_bus_space wii_mem_tag = { 139 .pbs_flags = _BUS_SPACE_BIG_ENDIAN | 140 _BUS_SPACE_MEM_TYPE, 141 .pbs_offset = 0, 142 .pbs_base = 0x0c000000, 143 .pbs_limit = 0x0dffffff, 144 .pbs_extent = NULL, 145 }; 146 147 static char ex_storage[1][EXTENT_FIXED_STORAGE_SIZE(EXTMAP_RANGES)] 148 __attribute__((aligned(8))); 149 150 static bus_addr_t 151 wii_dma_phys_to_bus_mem(bus_dma_tag_t t, bus_addr_t addr) 152 { 153 return addr; 154 } 155 156 static bus_addr_t 157 wii_dma_bus_mem_to_phys(bus_dma_tag_t t, bus_addr_t addr) 158 { 159 return addr; 160 } 161 162 static int 163 wii_mem2_dmamem_alloc(bus_dma_tag_t t, bus_size_t size, bus_size_t alignment, 164 bus_size_t boundary, bus_dma_segment_t *segs, int nsegs, int *rsegs, 165 int flags) 166 { 167 struct mem_region *mem, *avail; 168 169 /* Restrict memory used for DMA to ranges in MEM2 */ 170 mem_regions(&mem, &avail); 171 if (mem[1].size == 0) { 172 return ENOMEM; 173 } 174 175 return _bus_dmamem_alloc_range(t, size, alignment, boundary, segs, 176 nsegs, rsegs, flags, mem[1].start, 177 mem[1].start + mem[1].size - PAGE_SIZE - 1); 178 } 179 180 struct powerpc_bus_dma_tag wii_bus_dma_tag = { 181 0, /* _bounce_thresh */ 182 _bus_dmamap_create, 183 _bus_dmamap_destroy, 184 _bus_dmamap_load, 185 _bus_dmamap_load_mbuf, 186 _bus_dmamap_load_uio, 187 _bus_dmamap_load_raw, 188 _bus_dmamap_unload, 189 _bus_dmamap_sync, 190 _bus_dmamem_alloc, 191 _bus_dmamem_free, 192 _bus_dmamem_map, 193 _bus_dmamem_unmap, 194 _bus_dmamem_mmap, 195 wii_dma_phys_to_bus_mem, 196 wii_dma_bus_mem_to_phys, 197 }; 198 199 struct powerpc_bus_dma_tag wii_mem2_bus_dma_tag = { 200 0, /* _bounce_thresh */ 201 _bus_dmamap_create, 202 _bus_dmamap_destroy, 203 _bus_dmamap_load, 204 _bus_dmamap_load_mbuf, 205 _bus_dmamap_load_uio, 206 _bus_dmamap_load_raw, 207 _bus_dmamap_unload, 208 _bus_dmamap_sync, 209 wii_mem2_dmamem_alloc, 210 _bus_dmamem_free, 211 _bus_dmamem_map, 212 _bus_dmamem_unmap, 213 _bus_dmamem_mmap, 214 wii_dma_phys_to_bus_mem, 215 wii_dma_bus_mem_to_phys, 216 }; 217 218 219 /* 220 * Global variables used here and there 221 */ 222 struct mem_region physmemr[3], availmemr[3]; 223 char wii_cmdline[1024]; 224 225 void initppc(u_int, u_int, u_int, void *); /* Called from locore */ 226 void wii_dolphin_elf_loader_id(void); 227 228 static void wii_setup(void); 229 static void init_decrementer(void); 230 231 void 232 initppc(u_int startkernel, u_int endkernel, u_int args, void *btinfo) 233 { 234 extern u_long ticks_per_sec; 235 extern unsigned char edata[], end[]; 236 extern struct wii_argv wii_argv; 237 uint32_t mem2_start, mem2_end; 238 register_t scratch; 239 240 memset(&edata, 0, end - edata); /* clear BSS */ 241 242 wii_cmdline[0] = '\0'; 243 if (wii_argv.magic == WII_ARGV_MAGIC) { 244 void *ptr = (void *)(uintptr_t)(wii_argv.cmdline & ~0x80000000); 245 if (ptr != NULL) { 246 memcpy(wii_cmdline, ptr, wii_argv.length); 247 } 248 } else { 249 snprintf(wii_cmdline, sizeof(wii_cmdline), WII_DEFAULT_CMDLINE); 250 } 251 252 mem2_start = in32(GLOBAL_MEM2_AVAIL_START) & ~0x80000000; 253 mem2_end = in32(GLOBAL_MEM2_AVAIL_END) & ~0x80000000; 254 if (mem2_start < WII_MEM2_BASE) { 255 /* Must have been booted from MINI. */ 256 mem2_start = WII_MEM2_BASE + DSP_MEM_SIZE; 257 mem2_end = MINI_MEM2_START; 258 } 259 /* 260 * Clear GLOBAL_MEM2_AVAIL_{START,END} so we can detect the correct 261 * memory size when soft resetting from IOS to MINI. 262 */ 263 out32(GLOBAL_MEM2_AVAIL_START, 0); 264 out32(GLOBAL_MEM2_AVAIL_END, 0); 265 266 /* MEM1 24MB 1T-SRAM */ 267 physmemr[0].start = WII_MEM1_BASE; 268 physmemr[0].size = WII_MEM1_SIZE; 269 270 /* MEM2 64MB GDDR3 */ 271 physmemr[1].start = WII_MEM2_BASE; 272 physmemr[1].size = WII_MEM2_SIZE; 273 274 physmemr[2].size = 0; 275 276 /* MEM1 available memory */ 277 availmemr[0].start = ((endkernel & ~0x80000000) + PGOFSET) & ~PGOFSET; 278 availmemr[0].size = physmemr[0].size - availmemr[0].start; 279 /* External framebuffer is at the end of MEM1 */ 280 availmemr[0].size -= XFB_SIZE; 281 282 /* MEM2 available memory */ 283 availmemr[1].start = mem2_start; 284 availmemr[1].size = mem2_end - mem2_start; 285 286 availmemr[2].size = 0; 287 288 #ifdef BOOTHOWTO 289 /* 290 * boothowto 291 */ 292 boothowto = BOOTHOWTO; 293 #endif 294 295 /* HID4[L2_CCFI] must be set to 1 for correct operation of L2 cache */ 296 mtspr(IBM750CL_SPR_HID4, mfspr(IBM750CL_SPR_HID4) | L2_CCFI); 297 298 /* Configure L2 cache */ 299 l2cr_config = L2CR_L2E | L2CR_L2PE; 300 301 if (bus_space_init(&wii_mem_tag, "iomem", 302 ex_storage[0], sizeof(ex_storage[0]))) { 303 panic("bus_space_init failed"); 304 } 305 306 /* 307 * Initialize the BAT registers 308 */ 309 oea_batinit( 310 WII_IOMEM_BASE, BAT_BL_32M, 311 0); 312 313 /* 314 * Set up trap vectors 315 */ 316 oea_init(NULL); 317 318 /* 319 * Get CPU clock 320 */ 321 ticks_per_sec = TIMEBASE_FREQ_HZ; 322 cpu_timebase = ticks_per_sec; 323 324 wii_setup(); 325 326 uvm_md_init(); 327 328 /* 329 * Initialize pmap module. 330 */ 331 pmap_bootstrap(startkernel, endkernel); 332 333 /* Now enable translation (and machine checks/recoverable interrupts) */ 334 __asm __volatile ("sync; mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 335 : "=r"(scratch) 336 : "K"(PSL_IR|PSL_DR|PSL_ME|PSL_RI)); 337 338 /* 339 * Setup decrementer 340 */ 341 init_decrementer(); 342 } 343 344 void 345 mem_regions(struct mem_region **mem, struct mem_region **avail) 346 { 347 *mem = physmemr; 348 *avail = availmemr; 349 } 350 351 /* 352 * Machine dependent startup code. 353 */ 354 void 355 cpu_startup(void) 356 { 357 extern void pi_init_intr(void); 358 359 oea_startup(NULL); 360 361 /* 362 * Now that we have VM, malloc()s are OK in bus_space. 363 */ 364 bus_space_mallocok(); 365 366 /* Set up interrupt controller */ 367 pic_init(); 368 pi_init_intr(); 369 oea_install_extint(pic_ext_intr); 370 } 371 372 /* 373 * No early console support. 374 */ 375 void 376 consinit(void) 377 { 378 #if NUKBD > 0 379 ukbd_cnattach(); 380 #endif 381 } 382 383 /* 384 * Halt or reboot the machine after syncing/dumping according to howto. 385 */ 386 void 387 cpu_reboot(int howto, char *what) 388 { 389 static int syncing; 390 extern void disable_intr(void); 391 392 boothowto = howto; 393 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 394 syncing = 1; 395 vfs_shutdown(); /* sync */ 396 } 397 splhigh(); 398 if (!cold && (howto & RB_DUMP)) { 399 oea_dumpsys(); 400 } 401 pmf_system_shutdown(boothowto); 402 doshutdownhooks(); 403 404 disable_intr(); 405 406 /* Force halt on panic to capture the cause on screen. */ 407 if (panicstr != NULL) { 408 howto |= RB_HALT; 409 } 410 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 411 printf("power off\n\n"); 412 out32(HW_GPIOB_OUT, in32(HW_GPIOB_OUT) | __BIT(GPIO_SHUTDOWN)); 413 delay(100000); 414 printf("power off failed!\n\n"); 415 } 416 if (howto & RB_HALT) { 417 printf("halted\n\n"); 418 while (1); 419 } 420 421 printf("rebooting\n\n"); 422 out32(HW_RESETS, in32(HW_RESETS) & ~RSTBINB); 423 while (1); 424 } 425 426 static void 427 wii_setup(void) 428 { 429 /* Turn on the drive slot LED. */ 430 wii_slot_led(true); 431 432 /* Enable PPC access to SHUTDOWN GPIO. */ 433 out32(HW_GPIO_OWNER, in32(HW_GPIO_OWNER) | __BIT(GPIO_SHUTDOWN)); 434 435 /* Enable PPC access to EXI bus. */ 436 out32(HW_AIPPROT, in32(HW_AIPPROT) | ENAHBIOPI); 437 } 438 439 static void 440 init_decrementer(void) 441 { 442 extern uint32_t ns_per_tick; 443 extern uint32_t ticks_per_intr; 444 extern u_long ticks_per_sec; 445 int scratch, msr; 446 447 KASSERT(ticks_per_sec != 0); 448 449 __asm volatile ("mfmsr %0; andi. %1,%0,%2; mtmsr %1" 450 : "=r"(msr), "=r"(scratch) : "K"((u_short)~PSL_EE)); 451 ns_per_tick = 1000000000 / ticks_per_sec; 452 ticks_per_intr = ticks_per_sec / hz; 453 cpu_timebase = ticks_per_sec; 454 455 curcpu()->ci_lasttb = mftbl(); 456 457 mtspr(SPR_DEC, ticks_per_intr); 458 mtmsr(msr); 459 } 460
Indexes created Sun Oct 19 02:09:48 GMT 2025