mv_machdep.c revision 330897
1/*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 1994-1998 Mark Brinicombe. 5 * Copyright (c) 1994 Brini. 6 * All rights reserved. 7 * 8 * This code is derived from software written for Brini by Mark Brinicombe 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by Brini. 21 * 4. The name of the company nor the name of the author may be used to 22 * endorse or promote products derived from this software without specific 23 * prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 29 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 30 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 31 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: FreeBSD: //depot/projects/arm/src/sys/arm/at91/kb920x_machdep.c, rev 45 38 */ 39 40#include "opt_ddb.h" 41#include "opt_platform.h" 42 43#include <sys/cdefs.h> 44__FBSDID("$FreeBSD: stable/11/sys/arm/mv/mv_machdep.c 330897 2018-03-14 03:19:51Z eadler $"); 45 46#define _ARM32_BUS_DMA_PRIVATE 47#include <sys/param.h> 48#include <sys/systm.h> 49#include <sys/bus.h> 50#include <sys/devmap.h> 51 52#include <vm/vm.h> 53#include <vm/pmap.h> 54 55#include <machine/bus.h> 56#include <machine/fdt.h> 57#include <machine/machdep.h> 58#include <machine/platform.h> 59 60#if __ARM_ARCH < 6 61#include <machine/cpu-v4.h> 62#else 63#include <machine/cpu-v6.h> 64#endif 65 66#include <arm/mv/mvreg.h> /* XXX */ 67#include <arm/mv/mvvar.h> /* XXX eventually this should be eliminated */ 68#include <arm/mv/mvwin.h> 69 70#include <dev/fdt/fdt_common.h> 71 72static int platform_mpp_init(void); 73#if defined(SOC_MV_ARMADAXP) 74void armadaxp_init_coher_fabric(void); 75void armadaxp_l2_init(void); 76#endif 77#if defined(SOC_MV_ARMADA38X) 78int armada38x_win_set_iosync_barrier(void); 79int armada38x_scu_enable(void); 80int armada38x_open_bootrom_win(void); 81#endif 82 83#define MPP_PIN_MAX 68 84#define MPP_PIN_CELLS 2 85#define MPP_PINS_PER_REG 8 86#define MPP_SEL(pin,func) (((func) & 0xf) << \ 87 (((pin) % MPP_PINS_PER_REG) * 4)) 88 89static int 90platform_mpp_init(void) 91{ 92 pcell_t pinmap[MPP_PIN_MAX * MPP_PIN_CELLS]; 93 int mpp[MPP_PIN_MAX]; 94 uint32_t ctrl_val, ctrl_offset; 95 pcell_t reg[4]; 96 u_long start, size; 97 phandle_t node; 98 pcell_t pin_cells, *pinmap_ptr, pin_count; 99 ssize_t len; 100 int par_addr_cells, par_size_cells; 101 int tuple_size, tuples, rv, pins, i, j; 102 int mpp_pin, mpp_function; 103 104 /* 105 * Try to access the MPP node directly i.e. through /aliases/mpp. 106 */ 107 if ((node = OF_finddevice("mpp")) != -1) 108 if (fdt_is_compatible(node, "mrvl,mpp")) 109 goto moveon; 110 /* 111 * Find the node the long way. 112 */ 113 if ((node = OF_finddevice("/")) == -1) 114 return (ENXIO); 115 116 if ((node = fdt_find_compatible(node, "simple-bus", 0)) == 0) 117 return (ENXIO); 118 119 if ((node = fdt_find_compatible(node, "mrvl,mpp", 0)) == 0) 120 /* 121 * No MPP node. Fall back to how MPP got set by the 122 * first-stage loader and try to continue booting. 123 */ 124 return (0); 125moveon: 126 /* 127 * Process 'reg' prop. 128 */ 129 if ((rv = fdt_addrsize_cells(OF_parent(node), &par_addr_cells, 130 &par_size_cells)) != 0) 131 return(ENXIO); 132 133 tuple_size = sizeof(pcell_t) * (par_addr_cells + par_size_cells); 134 len = OF_getprop(node, "reg", reg, sizeof(reg)); 135 tuples = len / tuple_size; 136 if (tuple_size <= 0) 137 return (EINVAL); 138 139 /* 140 * Get address/size. XXX we assume only the first 'reg' tuple is used. 141 */ 142 rv = fdt_data_to_res(reg, par_addr_cells, par_size_cells, 143 &start, &size); 144 if (rv != 0) 145 return (rv); 146 start += fdt_immr_va; 147 148 /* 149 * Process 'pin-count' and 'pin-map' props. 150 */ 151 if (OF_getencprop(node, "pin-count", &pin_count, sizeof(pin_count)) <= 0) 152 return (ENXIO); 153 if (pin_count > MPP_PIN_MAX) 154 return (ERANGE); 155 156 if (OF_getencprop(node, "#pin-cells", &pin_cells, sizeof(pin_cells)) <= 0) 157 pin_cells = MPP_PIN_CELLS; 158 if (pin_cells > MPP_PIN_CELLS) 159 return (ERANGE); 160 tuple_size = sizeof(pcell_t) * pin_cells; 161 162 bzero(pinmap, sizeof(pinmap)); 163 len = OF_getencprop(node, "pin-map", pinmap, sizeof(pinmap)); 164 if (len <= 0) 165 return (ERANGE); 166 if (len % tuple_size) 167 return (ERANGE); 168 pins = len / tuple_size; 169 if (pins > pin_count) 170 return (ERANGE); 171 /* 172 * Fill out a "mpp[pin] => function" table. All pins unspecified in 173 * the 'pin-map' property are defaulted to 0 function i.e. GPIO. 174 */ 175 bzero(mpp, sizeof(mpp)); 176 pinmap_ptr = pinmap; 177 for (i = 0; i < pins; i++) { 178 mpp_pin = *pinmap_ptr; 179 mpp_function = *(pinmap_ptr + 1); 180 mpp[mpp_pin] = mpp_function; 181 pinmap_ptr += pin_cells; 182 } 183 184 /* 185 * Prepare and program MPP control register values. 186 */ 187 ctrl_offset = 0; 188 for (i = 0; i < pin_count;) { 189 ctrl_val = 0; 190 191 for (j = 0; j < MPP_PINS_PER_REG; j++) { 192 if (i + j == pin_count - 1) 193 break; 194 ctrl_val |= MPP_SEL(i + j, mpp[i + j]); 195 } 196 i += MPP_PINS_PER_REG; 197 bus_space_write_4(fdtbus_bs_tag, start, ctrl_offset, 198 ctrl_val); 199 200#if defined(SOC_MV_ORION) 201 /* 202 * Third MPP reg on Orion SoC is placed 203 * non-linearly (with different offset). 204 */ 205 if (i == (2 * MPP_PINS_PER_REG)) 206 ctrl_offset = 0x50; 207 else 208#endif 209 ctrl_offset += 4; 210 } 211 212 return (0); 213} 214 215vm_offset_t 216platform_lastaddr(void) 217{ 218 219 return (fdt_immr_va); 220} 221 222void 223platform_probe_and_attach(void) 224{ 225 226 if (fdt_immr_addr(MV_BASE) != 0) 227 while (1); 228} 229 230void 231platform_gpio_init(void) 232{ 233 234 /* 235 * Re-initialise MPP. It is important to call this prior to using 236 * console as the physical connection can be routed via MPP. 237 */ 238 if (platform_mpp_init() != 0) 239 while (1); 240} 241 242void 243platform_late_init(void) 244{ 245 /* 246 * Re-initialise decode windows 247 */ 248#if !defined(SOC_MV_FREY) 249 if (soc_decode_win() != 0) 250 printf("WARNING: could not re-initialise decode windows! " 251 "Running with existing settings...\n"); 252#else 253 /* Disable watchdog and timers */ 254 write_cpu_ctrl(CPU_TIMERS_BASE + CPU_TIMER_CONTROL, 0); 255#endif 256#if defined(SOC_MV_ARMADAXP) 257#if !defined(SMP) 258 /* For SMP case it should be initialized after APs are booted */ 259 armadaxp_init_coher_fabric(); 260#endif 261 armadaxp_l2_init(); 262#endif 263 264#if defined(SOC_MV_ARMADA38X) 265 /* Set IO Sync Barrier bit for all Mbus devices */ 266 if (armada38x_win_set_iosync_barrier() != 0) 267 printf("WARNING: could not map CPU Subsystem registers\n"); 268 if (armada38x_scu_enable() != 0) 269 printf("WARNING: could not enable SCU\n"); 270#ifdef SMP 271 /* Open window to bootROM memory - needed for SMP */ 272 if (armada38x_open_bootrom_win() != 0) 273 printf("WARNING: could not open window to bootROM\n"); 274#endif 275#endif 276} 277 278#define FDT_DEVMAP_MAX (MV_WIN_CPU_MAX + 2) 279static struct devmap_entry fdt_devmap[FDT_DEVMAP_MAX] = { 280 { 0, 0, 0, } 281}; 282 283static int 284platform_sram_devmap(struct devmap_entry *map) 285{ 286#if !defined(SOC_MV_ARMADAXP) && !defined(SOC_MV_ARMADA38X) 287 phandle_t child, root; 288 u_long base, size; 289 /* 290 * SRAM range. 291 */ 292 if ((child = OF_finddevice("/sram")) != 0) 293 if (fdt_is_compatible(child, "mrvl,cesa-sram") || 294 fdt_is_compatible(child, "mrvl,scratchpad")) 295 goto moveon; 296 297 if ((root = OF_finddevice("/")) == 0) 298 return (ENXIO); 299 300 if ((child = fdt_find_compatible(root, "mrvl,cesa-sram", 0)) == 0 && 301 (child = fdt_find_compatible(root, "mrvl,scratchpad", 0)) == 0) 302 goto out; 303 304moveon: 305 if (fdt_regsize(child, &base, &size) != 0) 306 return (EINVAL); 307 308 map->pd_va = MV_CESA_SRAM_BASE; /* XXX */ 309 map->pd_pa = base; 310 map->pd_size = size; 311 312 return (0); 313out: 314#endif 315 return (ENOENT); 316 317} 318 319/* 320 * Supply a default do-nothing implementation of mv_pci_devmap() via a weak 321 * alias. Many Marvell platforms don't support a PCI interface, but to support 322 * those that do, we end up with a reference to this function below, in 323 * platform_devmap_init(). If "device pci" appears in the kernel config, the 324 * real implementation of this function in arm/mv/mv_pci.c overrides the weak 325 * alias defined here. 326 */ 327int mv_default_fdt_pci_devmap(phandle_t node, struct devmap_entry *devmap, 328 vm_offset_t io_va, vm_offset_t mem_va); 329int 330mv_default_fdt_pci_devmap(phandle_t node, struct devmap_entry *devmap, 331 vm_offset_t io_va, vm_offset_t mem_va) 332{ 333 334 return (0); 335} 336__weak_reference(mv_default_fdt_pci_devmap, mv_pci_devmap); 337 338/* 339 * XXX: When device entry in devmap has pd_size smaller than section size, 340 * system will freeze during initialization 341 */ 342 343/* 344 * Construct devmap table with DT-derived config data. 345 */ 346int 347platform_devmap_init(void) 348{ 349 phandle_t root, child; 350 pcell_t bank_count; 351 int i, num_mapped; 352 353 i = 0; 354 devmap_register_table(&fdt_devmap[0]); 355 356#ifdef SOC_MV_ARMADAXP 357 vm_paddr_t cur_immr_pa; 358 359 /* 360 * Acquire SoC registers' base passed by u-boot and fill devmap 361 * accordingly. DTB is going to be modified basing on this data 362 * later. 363 */ 364 __asm __volatile("mrc p15, 4, %0, c15, c0, 0" : "=r" (cur_immr_pa)); 365 cur_immr_pa = (cur_immr_pa << 13) & 0xff000000; 366 if (cur_immr_pa != 0) 367 fdt_immr_pa = cur_immr_pa; 368#endif 369 /* 370 * IMMR range. 371 */ 372 fdt_devmap[i].pd_va = fdt_immr_va; 373 fdt_devmap[i].pd_pa = fdt_immr_pa; 374 fdt_devmap[i].pd_size = fdt_immr_size; 375 i++; 376 377 /* 378 * SRAM range. 379 */ 380 if (i < FDT_DEVMAP_MAX) 381 if (platform_sram_devmap(&fdt_devmap[i]) == 0) 382 i++; 383 384 /* 385 * PCI range(s). 386 * PCI range(s) and localbus. 387 */ 388 if ((root = OF_finddevice("/")) == -1) 389 return (ENXIO); 390 for (child = OF_child(root); child != 0; child = OF_peer(child)) { 391 if (fdt_is_type(child, "pci") || fdt_is_type(child, "pciep")) { 392 /* 393 * Check space: each PCI node will consume 2 devmap 394 * entries. 395 */ 396 if (i + 1 >= FDT_DEVMAP_MAX) 397 return (ENOMEM); 398 399 /* 400 * XXX this should account for PCI and multiple ranges 401 * of a given kind. 402 */ 403 if (mv_pci_devmap(child, &fdt_devmap[i], MV_PCI_VA_IO_BASE, 404 MV_PCI_VA_MEM_BASE) != 0) 405 return (ENXIO); 406 i += 2; 407 } 408 409 if (fdt_is_compatible(child, "mrvl,lbc")) { 410 /* Check available space */ 411 if (OF_getencprop(child, "bank-count", &bank_count, 412 sizeof(bank_count)) <= 0) 413 /* If no property, use default value */ 414 bank_count = 1; 415 416 if ((i + bank_count) >= FDT_DEVMAP_MAX) 417 return (ENOMEM); 418 419 /* Add all localbus ranges to device map */ 420 num_mapped = 0; 421 422 if (fdt_localbus_devmap(child, &fdt_devmap[i], 423 (int)bank_count, &num_mapped) != 0) 424 return (ENXIO); 425 426 i += num_mapped; 427 } 428 } 429 430 return (0); 431} 432 433#if __ARM_ARCH < 6 434struct arm32_dma_range * 435bus_dma_get_range(void) 436{ 437 438 return (NULL); 439} 440 441int 442bus_dma_get_range_nb(void) 443{ 444 445 return (0); 446} 447#endif 448 449#if defined(CPU_MV_PJ4B) 450#ifdef DDB 451#include <ddb/ddb.h> 452 453DB_SHOW_COMMAND(cp15, db_show_cp15) 454{ 455 u_int reg; 456 457 __asm __volatile("mrc p15, 0, %0, c0, c0, 0" : "=r" (reg)); 458 db_printf("Cpu ID: 0x%08x\n", reg); 459 __asm __volatile("mrc p15, 0, %0, c0, c0, 1" : "=r" (reg)); 460 db_printf("Current Cache Lvl ID: 0x%08x\n",reg); 461 462 reg = cp15_sctlr_get(); 463 db_printf("Ctrl: 0x%08x\n",reg); 464 reg = cp15_actlr_get(); 465 db_printf("Aux Ctrl: 0x%08x\n",reg); 466 467 __asm __volatile("mrc p15, 0, %0, c0, c1, 0" : "=r" (reg)); 468 db_printf("Processor Feat 0: 0x%08x\n", reg); 469 __asm __volatile("mrc p15, 0, %0, c0, c1, 1" : "=r" (reg)); 470 db_printf("Processor Feat 1: 0x%08x\n", reg); 471 __asm __volatile("mrc p15, 0, %0, c0, c1, 2" : "=r" (reg)); 472 db_printf("Debug Feat 0: 0x%08x\n", reg); 473 __asm __volatile("mrc p15, 0, %0, c0, c1, 3" : "=r" (reg)); 474 db_printf("Auxiliary Feat 0: 0x%08x\n", reg); 475 __asm __volatile("mrc p15, 0, %0, c0, c1, 4" : "=r" (reg)); 476 db_printf("Memory Model Feat 0: 0x%08x\n", reg); 477 __asm __volatile("mrc p15, 0, %0, c0, c1, 5" : "=r" (reg)); 478 db_printf("Memory Model Feat 1: 0x%08x\n", reg); 479 __asm __volatile("mrc p15, 0, %0, c0, c1, 6" : "=r" (reg)); 480 db_printf("Memory Model Feat 2: 0x%08x\n", reg); 481 __asm __volatile("mrc p15, 0, %0, c0, c1, 7" : "=r" (reg)); 482 db_printf("Memory Model Feat 3: 0x%08x\n", reg); 483 484 __asm __volatile("mrc p15, 1, %0, c15, c2, 0" : "=r" (reg)); 485 db_printf("Aux Func Modes Ctrl 0: 0x%08x\n",reg); 486 __asm __volatile("mrc p15, 1, %0, c15, c2, 1" : "=r" (reg)); 487 db_printf("Aux Func Modes Ctrl 1: 0x%08x\n",reg); 488 489 __asm __volatile("mrc p15, 1, %0, c15, c12, 0" : "=r" (reg)); 490 db_printf("CPU ID code extension: 0x%08x\n",reg); 491} 492 493DB_SHOW_COMMAND(vtop, db_show_vtop) 494{ 495 u_int reg; 496 497 if (have_addr) { 498 __asm __volatile("mcr p15, 0, %0, c7, c8, 0" : : "r" (addr)); 499 __asm __volatile("mrc p15, 0, %0, c7, c4, 0" : "=r" (reg)); 500 db_printf("Physical address reg: 0x%08x\n",reg); 501 } else 502 db_printf("show vtop <virt_addr>\n"); 503} 504#endif /* DDB */ 505#endif /* CPU_MV_PJ4B */ 506 507