1/*- 2 * Copyright (C) 2006-2012 Semihalf 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 17 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 19 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 21 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 22 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 23 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25/*- 26 * Copyright (C) 2001 Benno Rice 27 * All rights reserved. 28 * 29 * Redistribution and use in source and binary forms, with or without 30 * modification, are permitted provided that the following conditions 31 * are met: 32 * 1. Redistributions of source code must retain the above copyright 33 * notice, this list of conditions and the following disclaimer. 34 * 2. Redistributions in binary form must reproduce the above copyright 35 * notice, this list of conditions and the following disclaimer in the 36 * documentation and/or other materials provided with the distribution. 37 * 38 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR 39 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 40 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 41 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 43 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 44 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 45 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 46 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 47 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 48 * $NetBSD: machdep.c,v 1.74.2.1 2000/11/01 16:13:48 tv Exp $ 49 */ 50/*- 51 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 52 * Copyright (C) 1995, 1996 TooLs GmbH. 53 * All rights reserved. 54 * 55 * Redistribution and use in source and binary forms, with or without 56 * modification, are permitted provided that the following conditions 57 * are met: 58 * 1. Redistributions of source code must retain the above copyright 59 * notice, this list of conditions and the following disclaimer. 60 * 2. Redistributions in binary form must reproduce the above copyright 61 * notice, this list of conditions and the following disclaimer in the 62 * documentation and/or other materials provided with the distribution. 63 * 3. All advertising materials mentioning features or use of this software 64 * must display the following acknowledgement: 65 * This product includes software developed by TooLs GmbH. 66 * 4. The name of TooLs GmbH may not be used to endorse or promote products 67 * derived from this software without specific prior written permission. 68 * 69 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 70 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 71 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 72 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 73 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 74 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 75 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 76 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 77 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 78 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 79 */ 80 81#include <sys/cdefs.h> 82__FBSDID("$FreeBSD$"); 83 84#include "opt_ddb.h" 85#include "opt_hwpmc_hooks.h" 86#include "opt_kstack_pages.h" 87#include "opt_platform.h" 88 89#include <sys/cdefs.h> 90#include <sys/types.h> 91#include <sys/param.h> 92#include <sys/proc.h> 93#include <sys/systm.h> 94#include <sys/time.h> 95#include <sys/bio.h> 96#include <sys/buf.h> 97#include <sys/bus.h> 98#include <sys/cons.h> 99#include <sys/cpu.h> 100#include <sys/kdb.h> 101#include <sys/kernel.h> 102#include <sys/lock.h> 103#include <sys/mutex.h> 104#include <sys/rwlock.h> 105#include <sys/sysctl.h> 106#include <sys/exec.h> 107#include <sys/ktr.h> 108#include <sys/syscallsubr.h> 109#include <sys/sysproto.h> 110#include <sys/signalvar.h> 111#include <sys/sysent.h> 112#include <sys/imgact.h> 113#include <sys/msgbuf.h> 114#include <sys/ptrace.h> 115 116#include <vm/vm.h> 117#include <vm/pmap.h> 118#include <vm/vm_page.h> 119#include <vm/vm_object.h> 120#include <vm/vm_pager.h> 121 122#include <machine/cpu.h> 123#include <machine/kdb.h> 124#include <machine/reg.h> 125#include <machine/vmparam.h> 126#include <machine/spr.h> 127#include <machine/hid.h> 128#include <machine/psl.h> 129#include <machine/trap.h> 130#include <machine/md_var.h> 131#include <machine/mmuvar.h> 132#include <machine/sigframe.h> 133#include <machine/machdep.h> 134#include <machine/metadata.h> 135#include <machine/platform.h> 136 137#include <sys/linker.h> 138#include <sys/reboot.h> 139 140#include <contrib/libfdt/libfdt.h> 141#include <dev/fdt/fdt_common.h> 142#include <dev/ofw/openfirm.h> 143 144#ifdef DDB 145#include <ddb/ddb.h> 146#endif 147 148#ifdef DEBUG 149#define debugf(fmt, args...) printf(fmt, ##args) 150#else 151#define debugf(fmt, args...) 152#endif 153 154extern unsigned char _etext[]; 155extern unsigned char _edata[]; 156extern unsigned char __bss_start[]; 157extern unsigned char __sbss_start[]; 158extern unsigned char __sbss_end[]; 159extern unsigned char _end[]; 160extern vm_offset_t __endkernel; 161extern vm_paddr_t kernload; 162 163/* 164 * Bootinfo is passed to us by legacy loaders. Save the address of the 165 * structure to handle backward compatibility. 166 */ 167uint32_t *bootinfo; 168 169void print_kernel_section_addr(void); 170void print_kenv(void); 171uintptr_t booke_init(u_long, u_long); 172void ivor_setup(void); 173 174extern void *interrupt_vector_base; 175extern void *int_critical_input; 176extern void *int_machine_check; 177extern void *int_data_storage; 178extern void *int_instr_storage; 179extern void *int_external_input; 180extern void *int_alignment; 181extern void *int_fpu; 182extern void *int_program; 183extern void *int_syscall; 184extern void *int_decrementer; 185extern void *int_fixed_interval_timer; 186extern void *int_watchdog; 187extern void *int_data_tlb_error; 188extern void *int_inst_tlb_error; 189extern void *int_debug; 190extern void *int_debug_ed; 191extern void *int_vec; 192extern void *int_vecast; 193#ifdef __SPE__ 194extern void *int_spe_fpdata; 195extern void *int_spe_fpround; 196#endif 197#ifdef HWPMC_HOOKS 198extern void *int_performance_counter; 199#endif 200 201#define SET_TRAP(ivor, handler) \ 202 KASSERT(((uintptr_t)(&handler) & ~0xffffUL) == \ 203 ((uintptr_t)(&interrupt_vector_base) & ~0xffffUL), \ 204 ("Handler " #handler " too far from interrupt vector base")); \ 205 mtspr(ivor, (uintptr_t)(&handler) & 0xffffUL); 206 207uintptr_t powerpc_init(vm_offset_t fdt, vm_offset_t, vm_offset_t, void *mdp, 208 uint32_t mdp_cookie); 209void booke_cpu_init(void); 210 211void 212booke_cpu_init(void) 213{ 214 215 cpu_features |= PPC_FEATURE_BOOKE; 216 217 psl_kernset = PSL_CE | PSL_ME | PSL_EE; 218#ifdef __powerpc64__ 219 psl_kernset |= PSL_CM; 220#endif 221 psl_userset = psl_kernset | PSL_PR; 222#ifdef __powerpc64__ 223 psl_userset32 = psl_userset & ~PSL_CM; 224#endif 225 psl_userstatic = ~(PSL_VEC | PSL_FP | PSL_FE0 | PSL_FE1); 226 227 pmap_mmu_install(MMU_TYPE_BOOKE, BUS_PROBE_GENERIC); 228} 229 230void 231ivor_setup(void) 232{ 233 234 mtspr(SPR_IVPR, ((uintptr_t)&interrupt_vector_base) & ~0xffffUL); 235 236 SET_TRAP(SPR_IVOR0, int_critical_input); 237 SET_TRAP(SPR_IVOR1, int_machine_check); 238 SET_TRAP(SPR_IVOR2, int_data_storage); 239 SET_TRAP(SPR_IVOR3, int_instr_storage); 240 SET_TRAP(SPR_IVOR4, int_external_input); 241 SET_TRAP(SPR_IVOR5, int_alignment); 242 SET_TRAP(SPR_IVOR6, int_program); 243 SET_TRAP(SPR_IVOR8, int_syscall); 244 SET_TRAP(SPR_IVOR10, int_decrementer); 245 SET_TRAP(SPR_IVOR11, int_fixed_interval_timer); 246 SET_TRAP(SPR_IVOR12, int_watchdog); 247 SET_TRAP(SPR_IVOR13, int_data_tlb_error); 248 SET_TRAP(SPR_IVOR14, int_inst_tlb_error); 249 SET_TRAP(SPR_IVOR15, int_debug); 250#ifdef HWPMC_HOOKS 251 SET_TRAP(SPR_IVOR35, int_performance_counter); 252#endif 253 switch ((mfpvr() >> 16) & 0xffff) { 254 case FSL_E6500: 255 SET_TRAP(SPR_IVOR32, int_vec); 256 SET_TRAP(SPR_IVOR33, int_vecast); 257 /* FALLTHROUGH */ 258 case FSL_E500mc: 259 case FSL_E5500: 260 SET_TRAP(SPR_IVOR7, int_fpu); 261 SET_TRAP(SPR_IVOR15, int_debug_ed); 262 break; 263 case FSL_E500v1: 264 case FSL_E500v2: 265 SET_TRAP(SPR_IVOR32, int_vec); 266#ifdef __SPE__ 267 SET_TRAP(SPR_IVOR33, int_spe_fpdata); 268 SET_TRAP(SPR_IVOR34, int_spe_fpround); 269#endif 270 break; 271 } 272 273#ifdef __powerpc64__ 274 /* Set 64-bit interrupt mode. */ 275 mtspr(SPR_EPCR, mfspr(SPR_EPCR) | EPCR_ICM); 276#endif 277} 278 279static int 280booke_check_for_fdt(uint32_t arg1, vm_offset_t *dtbp) 281{ 282 void *ptr; 283 int fdt_size; 284 285 if (arg1 % 8 != 0) 286 return (-1); 287 288 ptr = (void *)pmap_early_io_map(arg1, PAGE_SIZE); 289 if (fdt_check_header(ptr) != 0) 290 return (-1); 291 292 /* 293 * Read FDT total size from the header of FDT. 294 * This for sure hits within first page which is 295 * already mapped. 296 */ 297 fdt_size = fdt_totalsize((void *)ptr); 298 299 /* 300 * Ok, arg1 points to FDT, so we need to map it in. 301 * First, unmap this page and then map FDT again with full size 302 */ 303 pmap_early_io_unmap((vm_offset_t)ptr, PAGE_SIZE); 304 ptr = (void *)pmap_early_io_map(arg1, fdt_size); 305 *dtbp = (vm_offset_t)ptr; 306 307 return (0); 308} 309 310uintptr_t 311booke_init(u_long arg1, u_long arg2) 312{ 313 uintptr_t ret; 314 void *mdp; 315 vm_offset_t dtbp, end; 316 317 end = (uintptr_t)_end; 318 dtbp = (vm_offset_t)NULL; 319 320 /* Set up TLB initially */ 321 bootinfo = NULL; 322 bzero(__sbss_start, __sbss_end - __sbss_start); 323 bzero(__bss_start, _end - __bss_start); 324 tlb1_init(); 325 326 /* 327 * Handle the various ways we can get loaded and started: 328 * - FreeBSD's loader passes the pointer to the metadata 329 * in arg1, with arg2 undefined. arg1 has a value that's 330 * relative to the kernel's link address (i.e. larger 331 * than 0xc0000000). 332 * - Juniper's loader passes the metadata pointer in arg2 333 * and sets arg1 to zero. This is to signal that the 334 * loader maps the kernel and starts it at its link 335 * address (unlike the FreeBSD loader). 336 * - U-Boot passes the standard argc and argv parameters 337 * in arg1 and arg2 (resp). arg1 is between 1 and some 338 * relatively small number, such as 64K. arg2 is the 339 * physical address of the argv vector. 340 * - ePAPR loaders pass an FDT blob in r3 (arg1) and the magic hex 341 * string 0x45504150 ('EPAP') in r6 (which has been lost by now). 342 * r4 (arg2) is supposed to be set to zero, but is not always. 343 */ 344 345 if (arg1 == 0) /* Juniper loader */ 346 mdp = (void *)arg2; 347 else if (booke_check_for_fdt(arg1, &dtbp) == 0) { /* ePAPR */ 348 end = roundup(end, 8); 349 memmove((void *)end, (void *)dtbp, fdt_totalsize((void *)dtbp)); 350 dtbp = end; 351 end += fdt_totalsize((void *)dtbp); 352 __endkernel = end; 353 mdp = NULL; 354 } else if (arg1 > (uintptr_t)kernload) /* FreeBSD loader */ 355 mdp = (void *)arg1; 356 else /* U-Boot */ 357 mdp = NULL; 358 359 /* Default to 32 byte cache line size. */ 360 switch ((mfpvr()) >> 16) { 361 case FSL_E500mc: 362 case FSL_E5500: 363 case FSL_E6500: 364 cacheline_size = 64; 365 break; 366 } 367 368 /* 369 * Last element is a magic cookie that indicates that the metadata 370 * pointer is meaningful. 371 */ 372 ret = powerpc_init(dtbp, 0, 0, mdp, (mdp == NULL) ? 0 : 0xfb5d104d); 373 374 /* Enable caches */ 375 booke_enable_l1_cache(); 376 booke_enable_l2_cache(); 377 378 booke_enable_bpred(); 379 380 return (ret); 381} 382 383#define RES_GRANULE cacheline_size 384extern uintptr_t tlb0_miss_locks[]; 385 386/* Initialise a struct pcpu. */ 387void 388cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz) 389{ 390 391 pcpu->pc_booke.tid_next = TID_MIN; 392 393#ifdef SMP 394 uintptr_t *ptr; 395 int words_per_gran = RES_GRANULE / sizeof(uintptr_t); 396 397 ptr = &tlb0_miss_locks[cpuid * words_per_gran]; 398 pcpu->pc_booke.tlb_lock = ptr; 399 *ptr = TLB_UNLOCKED; 400 *(ptr + 1) = 0; /* recurse counter */ 401#endif 402} 403 404/* Shutdown the CPU as much as possible. */ 405void 406cpu_halt(void) 407{ 408 409 mtmsr(mfmsr() & ~(PSL_CE | PSL_EE | PSL_ME | PSL_DE)); 410 while (1) 411 ; 412} 413 414int 415ptrace_single_step(struct thread *td) 416{ 417 struct trapframe *tf; 418 419 tf = td->td_frame; 420 tf->srr1 |= PSL_DE; 421 tf->cpu.booke.dbcr0 |= (DBCR0_IDM | DBCR0_IC); 422 return (0); 423} 424 425int 426ptrace_clear_single_step(struct thread *td) 427{ 428 struct trapframe *tf; 429 430 tf = td->td_frame; 431 tf->srr1 &= ~PSL_DE; 432 tf->cpu.booke.dbcr0 &= ~(DBCR0_IDM | DBCR0_IC); 433 return (0); 434} 435 436void 437kdb_cpu_clear_singlestep(void) 438{ 439 register_t r; 440 441 r = mfspr(SPR_DBCR0); 442 mtspr(SPR_DBCR0, r & ~DBCR0_IC); 443 kdb_frame->srr1 &= ~PSL_DE; 444} 445 446void 447kdb_cpu_set_singlestep(void) 448{ 449 register_t r; 450 451 r = mfspr(SPR_DBCR0); 452 mtspr(SPR_DBCR0, r | DBCR0_IC | DBCR0_IDM); 453 kdb_frame->srr1 |= PSL_DE; 454} 455 456