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arm64: don't kill the kernel on a bad esr from el0
[mirror_ubuntu-artful-kernel.git] / arch / powerpc / boot / prpmc2800.c
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c368d921
MG		 1/*
2 * Motorola ECC prpmc280/f101 & prpmc2800/f101e platform code.
3 *
4 * Author: Mark A. Greer <mgreer@mvista.com>
5 *
6 * 2007 (c) MontaVista, Software, Inc. This file is licensed under
7 * the terms of the GNU General Public License version 2. This program
8 * is licensed "as is" without any warranty of any kind, whether express
9 * or implied.
10 */
11
12#include <stdarg.h>
13#include <stddef.h>
14#include "types.h"
15#include "elf.h"
16#include "page.h"
17#include "string.h"
18#include "stdio.h"
19#include "io.h"
20#include "ops.h"
21#include "gunzip_util.h"
22#include "mv64x60.h"
23
c368d921
MG		 24#define KB 1024U
25#define MB (KB*KB)
26#define GB (KB*MB)
27#define MHz (1000U*1000U)
28#define GHz (1000U*MHz)
29
30#define BOARD_MODEL "PrPMC2800"
31#define BOARD_MODEL_MAX 32 /* max strlen(BOARD_MODEL) + 1 */
32
33#define EEPROM2_ADDR 0xa4
34#define EEPROM3_ADDR 0xa8
35
36BSS_STACK(16*KB);
37
38static u8 *bridge_base;
39
40typedef enum {
41 BOARD_MODEL_PRPMC280,
42 BOARD_MODEL_PRPMC2800,
43} prpmc2800_board_model;
44
45typedef enum {
46 BRIDGE_TYPE_MV64360,
47 BRIDGE_TYPE_MV64362,
48} prpmc2800_bridge_type;
49
50struct prpmc2800_board_info {
51 prpmc2800_board_model model;
52 char variant;
53 prpmc2800_bridge_type bridge_type;
54 u8 subsys0;
55 u8 subsys1;
56 u8 vpd4;
57 u8 vpd4_mask;
58 u32 core_speed;
59 u32 mem_size;
60 u32 boot_flash;
61 u32 user_flash;
62};
63
64static struct prpmc2800_board_info prpmc2800_board_info[] = {
65 {
66 .model = BOARD_MODEL_PRPMC280,
67 .variant = 'a',
68 .bridge_type = BRIDGE_TYPE_MV64360,
69 .subsys0 = 0xff,
70 .subsys1 = 0xff,
71 .vpd4 = 0x00,
72 .vpd4_mask = 0x0f,
73 .core_speed = 1*GHz,
74 .mem_size = 512*MB,
75 .boot_flash = 1*MB,
76 .user_flash = 64*MB,
77 },
78 {
79 .model = BOARD_MODEL_PRPMC280,
80 .variant = 'b',
81 .bridge_type = BRIDGE_TYPE_MV64362,
82 .subsys0 = 0xff,
83 .subsys1 = 0xff,
84 .vpd4 = 0x01,
85 .vpd4_mask = 0x0f,
86 .core_speed = 1*GHz,
87 .mem_size = 512*MB,
88 .boot_flash = 0,
89 .user_flash = 0,
90 },
91 {
92 .model = BOARD_MODEL_PRPMC280,
93 .variant = 'c',
94 .bridge_type = BRIDGE_TYPE_MV64360,
95 .subsys0 = 0xff,
96 .subsys1 = 0xff,
97 .vpd4 = 0x02,
98 .vpd4_mask = 0x0f,
99 .core_speed = 733*MHz,
100 .mem_size = 512*MB,
101 .boot_flash = 1*MB,
102 .user_flash = 64*MB,
103 },
104 {
105 .model = BOARD_MODEL_PRPMC280,
106 .variant = 'd',
107 .bridge_type = BRIDGE_TYPE_MV64360,
108 .subsys0 = 0xff,
109 .subsys1 = 0xff,
110 .vpd4 = 0x03,
111 .vpd4_mask = 0x0f,
112 .core_speed = 1*GHz,
113 .mem_size = 1*GB,
114 .boot_flash = 1*MB,
115 .user_flash = 64*MB,
116 },
117 {
118 .model = BOARD_MODEL_PRPMC280,
119 .variant = 'e',
120 .bridge_type = BRIDGE_TYPE_MV64360,
121 .subsys0 = 0xff,
122 .subsys1 = 0xff,
123 .vpd4 = 0x04,
124 .vpd4_mask = 0x0f,
125 .core_speed = 1*GHz,
126 .mem_size = 512*MB,
127 .boot_flash = 1*MB,
128 .user_flash = 64*MB,
129 },
130 {
131 .model = BOARD_MODEL_PRPMC280,
132 .variant = 'f',
133 .bridge_type = BRIDGE_TYPE_MV64362,
134 .subsys0 = 0xff,
135 .subsys1 = 0xff,
136 .vpd4 = 0x05,
137 .vpd4_mask = 0x0f,
138 .core_speed = 733*MHz,
139 .mem_size = 128*MB,
140 .boot_flash = 1*MB,
141 .user_flash = 0,
142 },
143 {
144 .model = BOARD_MODEL_PRPMC280,
145 .variant = 'g',
146 .bridge_type = BRIDGE_TYPE_MV64360,
147 .subsys0 = 0xff,
148 .subsys1 = 0xff,
149 .vpd4 = 0x06,
150 .vpd4_mask = 0x0f,
151 .core_speed = 1*GHz,
152 .mem_size = 256*MB,
153 .boot_flash = 1*MB,
154 .user_flash = 0,
155 },
156 {
157 .model = BOARD_MODEL_PRPMC280,
158 .variant = 'h',
159 .bridge_type = BRIDGE_TYPE_MV64360,
160 .subsys0 = 0xff,
161 .subsys1 = 0xff,
162 .vpd4 = 0x07,
163 .vpd4_mask = 0x0f,
164 .core_speed = 1*GHz,
165 .mem_size = 1*GB,
166 .boot_flash = 1*MB,
167 .user_flash = 64*MB,
168 },
169 {
170 .model = BOARD_MODEL_PRPMC2800,
171 .variant = 'a',
172 .bridge_type = BRIDGE_TYPE_MV64360,
173 .subsys0 = 0xb2,
174 .subsys1 = 0x8c,
175 .vpd4 = 0x00,
176 .vpd4_mask = 0x00,
177 .core_speed = 1*GHz,
178 .mem_size = 512*MB,
179 .boot_flash = 2*MB,
180 .user_flash = 64*MB,
181 },
182 {
183 .model = BOARD_MODEL_PRPMC2800,
184 .variant = 'b',
185 .bridge_type = BRIDGE_TYPE_MV64362,
186 .subsys0 = 0xb2,
187 .subsys1 = 0x8d,
188 .vpd4 = 0x00,
189 .vpd4_mask = 0x00,
190 .core_speed = 1*GHz,
191 .mem_size = 512*MB,
192 .boot_flash = 0,
193 .user_flash = 0,
194 },
195 {
196 .model = BOARD_MODEL_PRPMC2800,
197 .variant = 'c',
198 .bridge_type = BRIDGE_TYPE_MV64360,
199 .subsys0 = 0xb2,
200 .subsys1 = 0x8e,
201 .vpd4 = 0x00,
202 .vpd4_mask = 0x00,
203 .core_speed = 733*MHz,
204 .mem_size = 512*MB,
205 .boot_flash = 2*MB,
206 .user_flash = 64*MB,
207 },
208 {
209 .model = BOARD_MODEL_PRPMC2800,
210 .variant = 'd',
211 .bridge_type = BRIDGE_TYPE_MV64360,
212 .subsys0 = 0xb2,
213 .subsys1 = 0x8f,
214 .vpd4 = 0x00,
215 .vpd4_mask = 0x00,
216 .core_speed = 1*GHz,
217 .mem_size = 1*GB,
218 .boot_flash = 2*MB,
219 .user_flash = 64*MB,
220 },
221 {
222 .model = BOARD_MODEL_PRPMC2800,
223 .variant = 'e',
224 .bridge_type = BRIDGE_TYPE_MV64360,
225 .subsys0 = 0xa2,
226 .subsys1 = 0x8a,
227 .vpd4 = 0x00,
228 .vpd4_mask = 0x00,
229 .core_speed = 1*GHz,
230 .mem_size = 512*MB,
231 .boot_flash = 2*MB,
232 .user_flash = 64*MB,
233 },
234 {
235 .model = BOARD_MODEL_PRPMC2800,
236 .variant = 'f',
237 .bridge_type = BRIDGE_TYPE_MV64362,
238 .subsys0 = 0xa2,
239 .subsys1 = 0x8b,
240 .vpd4 = 0x00,
241 .vpd4_mask = 0x00,
242 .core_speed = 733*MHz,
243 .mem_size = 128*MB,
244 .boot_flash = 2*MB,
245 .user_flash = 0,
246 },
247 {
248 .model = BOARD_MODEL_PRPMC2800,
249 .variant = 'g',
250 .bridge_type = BRIDGE_TYPE_MV64360,
251 .subsys0 = 0xa2,
252 .subsys1 = 0x8c,
253 .vpd4 = 0x00,
254 .vpd4_mask = 0x00,
255 .core_speed = 1*GHz,
256 .mem_size = 2*GB,
257 .boot_flash = 2*MB,
258 .user_flash = 64*MB,
259 },
260 {
261 .model = BOARD_MODEL_PRPMC2800,
262 .variant = 'h',
263 .bridge_type = BRIDGE_TYPE_MV64360,
264 .subsys0 = 0xa2,
265 .subsys1 = 0x8d,
266 .vpd4 = 0x00,
267 .vpd4_mask = 0x00,
268 .core_speed = 733*MHz,
269 .mem_size = 1*GB,
270 .boot_flash = 2*MB,
271 .user_flash = 64*MB,
272 },
273};
274
275static struct prpmc2800_board_info *prpmc2800_get_board_info(u8 *vpd)
276{
277 struct prpmc2800_board_info *bip;
278 int i;
279
280 for (i=0,bip=prpmc2800_board_info; i<ARRAY_SIZE(prpmc2800_board_info);
281 i++,bip++)
282 if ((vpd[0] == bip->subsys0) && (vpd[1] == bip->subsys1)
283 && ((vpd[4] & bip->vpd4_mask) == bip->vpd4))
284 return bip;
285
286 return NULL;
287}
288
289/* Get VPD from i2c eeprom 2, then match it to a board info entry */
290static struct prpmc2800_board_info *prpmc2800_get_bip(void)
291{
292 struct prpmc2800_board_info *bip;
293 u8 vpd[5];
294 int rc;
295
296 if (mv64x60_i2c_open())
297 fatal("Error: Can't open i2c device\n\r");
298
299 /* Get VPD from i2c eeprom-2 */
300 memset(vpd, 0, sizeof(vpd));
301 rc = mv64x60_i2c_read(EEPROM2_ADDR, vpd, 0x1fde, 2, sizeof(vpd));
302 if (rc < 0)
303 fatal("Error: Couldn't read eeprom2\n\r");
304 mv64x60_i2c_close();
305
306 /* Get board type & related info */
307 bip = prpmc2800_get_board_info(vpd);
308 if (bip == NULL) {
309 printf("Error: Unsupported board or corrupted VPD:\n\r");
310 printf(" 0x%x 0x%x 0x%x 0x%x 0x%x\n\r",
311 vpd[0], vpd[1], vpd[2], vpd[3], vpd[4]);
312 printf("Using device tree defaults...\n\r");
313 }
314
315 return bip;
316}
317
318static void prpmc2800_bridge_setup(u32 mem_size)
319{
320 u32 i, v[12], enables, acc_bits;
321 u32 pci_base_hi, pci_base_lo, size, buf[2];
322 unsigned long cpu_base;
323 int rc;
324 void *devp;
325 u8 *bridge_pbase, is_coherent;
326 struct mv64x60_cpu2pci_win *tbl;
327
328 bridge_pbase = mv64x60_get_bridge_pbase();
329 is_coherent = mv64x60_is_coherent();
330
331 if (is_coherent)
332 acc_bits = MV64x60_PCI_ACC_CNTL_SNOOP_WB
333 | MV64x60_PCI_ACC_CNTL_SWAP_NONE
334 | MV64x60_PCI_ACC_CNTL_MBURST_32_BYTES
335 | MV64x60_PCI_ACC_CNTL_RDSIZE_32_BYTES;
336 else
337 acc_bits = MV64x60_PCI_ACC_CNTL_SNOOP_NONE
338 | MV64x60_PCI_ACC_CNTL_SWAP_NONE
339 | MV64x60_PCI_ACC_CNTL_MBURST_128_BYTES
340 | MV64x60_PCI_ACC_CNTL_RDSIZE_256_BYTES;
341
342 mv64x60_config_ctlr_windows(bridge_base, bridge_pbase, is_coherent);
343 mv64x60_config_pci_windows(bridge_base, bridge_pbase, 0, 0, mem_size,
344 acc_bits);
345
346 /* Get the cpu -> pci i/o & mem mappings from the device tree */
a05ce88a 347 devp = find_node_by_compatible(NULL, "marvell,mv64360-pci");
c368d921 348 if (devp == NULL)
a05ce88a 349 fatal("Error: Missing marvell,mv64360-pci"
c368d921
MG		 350 " device tree node\n\r");
351
352 rc = getprop(devp, "ranges", v, sizeof(v));
353 if (rc != sizeof(v))
a05ce88a 354 fatal("Error: Can't find marvell,mv64360-pci ranges"
c368d921
MG		 355 " property\n\r");
356
357 /* Get the cpu -> pci i/o & mem mappings from the device tree */
a05ce88a 358 devp = find_node_by_compatible(NULL, "marvell,mv64360");
c368d921 359 if (devp == NULL)
a05ce88a 360 fatal("Error: Missing marvell,mv64360 device tree node\n\r");
c368d921
MG		 361
362 enables = in_le32((u32 *)(bridge_base + MV64x60_CPU_BAR_ENABLE));
363 enables |= 0x0007fe00; /* Disable all cpu->pci windows */
364 out_le32((u32 *)(bridge_base + MV64x60_CPU_BAR_ENABLE), enables);
365
366 for (i=0; i<12; i+=6) {
367 switch (v[i] & 0xff000000) {
368 case 0x01000000: /* PCI I/O Space */
369 tbl = mv64x60_cpu2pci_io;
370 break;
371 case 0x02000000: /* PCI MEM Space */
372 tbl = mv64x60_cpu2pci_mem;
373 break;
374 default:
375 continue;
376 }
377
378 pci_base_hi = v[i+1];
379 pci_base_lo = v[i+2];
380 cpu_base = v[i+3];
381 size = v[i+5];
382
383 buf[0] = cpu_base;
384 buf[1] = size;
385
386 if (!dt_xlate_addr(devp, buf, sizeof(buf), &cpu_base))
387 fatal("Error: Can't translate PCI address 0x%x\n\r",
388 (u32)cpu_base);
389
390 mv64x60_config_cpu2pci_window(bridge_base, 0, pci_base_hi,
391 pci_base_lo, cpu_base, size, tbl);
392 }
393
394 enables &= ~0x00000600; /* Enable cpu->pci0 i/o, cpu->pci0 mem0 */
395 out_le32((u32 *)(bridge_base + MV64x60_CPU_BAR_ENABLE), enables);
396}
397
398static void prpmc2800_fixups(void)
399{
400 u32 v[2], l, mem_size;
401 int rc;
402 void *devp;
403 char model[BOARD_MODEL_MAX];
404 struct prpmc2800_board_info *bip;
405
406 bip = prpmc2800_get_bip(); /* Get board info based on VPD */
407
408 mem_size = (bip) ? bip->mem_size : mv64x60_get_mem_size(bridge_base);
409 prpmc2800_bridge_setup(mem_size); /* Do necessary bridge setup */
410
411 /* If the VPD doesn't match what we know about, just use the
412 * defaults already in the device tree.
413 */
414 if (!bip)
415 return;
416
417 /* Know the board type so override device tree defaults */
418 /* Set /model appropriately */
419 devp = finddevice("/");
420 if (devp == NULL)
421 fatal("Error: Missing '/' device tree node\n\r");
422 memset(model, 0, BOARD_MODEL_MAX);
423 strncpy(model, BOARD_MODEL, BOARD_MODEL_MAX - 2);
424 l = strlen(model);
425 if (bip->model == BOARD_MODEL_PRPMC280)
426 l--;
427 model[l++] = bip->variant;
428 model[l++] = '\0';
429 setprop(devp, "model", model, l);
430
431 /* Set /cpus/PowerPC,7447/clock-frequency */
a05ce88a 432 devp = find_node_by_prop_value_str(NULL, "device_type", "cpu");
c368d921 433 if (devp == NULL)
a05ce88a 434 fatal("Error: Missing proper cpu device tree node\n\r");
c368d921
MG		 435 v[0] = bip->core_speed;
436 setprop(devp, "clock-frequency", &v[0], sizeof(v[0]));
437
438 /* Set /memory/reg size */
439 devp = finddevice("/memory");
440 if (devp == NULL)
441 fatal("Error: Missing /memory device tree node\n\r");
442 v[0] = 0;
443 v[1] = bip->mem_size;
444 setprop(devp, "reg", v, sizeof(v));
445
a05ce88a 446 /* Update model, if this is a mv64362 */
c368d921 447 if (bip->bridge_type == BRIDGE_TYPE_MV64362) {
a05ce88a 448 devp = find_node_by_compatible(NULL, "marvell,mv64360");
c368d921 449 if (devp == NULL)
a05ce88a
DF		 450 fatal("Error: Missing marvell,mv64360"
451 " device tree node\n\r");
c368d921
MG		 452 setprop(devp, "model", "mv64362", strlen("mv64362") + 1);
453 }
454
455 /* Set User FLASH size */
a05ce88a 456 devp = find_node_by_compatible(NULL, "direct-mapped");
c368d921
MG		 457 if (devp == NULL)
458 fatal("Error: Missing User FLASH device tree node\n\r");
459 rc = getprop(devp, "reg", v, sizeof(v));
460 if (rc != sizeof(v))
461 fatal("Error: Can't find User FLASH reg property\n\r");
462 v[1] = bip->user_flash;
463 setprop(devp, "reg", v, sizeof(v));
464}
465
466#define MV64x60_MPP_CNTL_0 0xf000
467#define MV64x60_MPP_CNTL_2 0xf008
468#define MV64x60_GPP_IO_CNTL 0xf100
469#define MV64x60_GPP_LEVEL_CNTL 0xf110
470#define MV64x60_GPP_VALUE_SET 0xf118
471
472static void prpmc2800_reset(void)
473{
474 u32 temp;
475
476 udelay(5000000);
477
478 if (bridge_base != 0) {
479 temp = in_le32((u32 *)(bridge_base + MV64x60_MPP_CNTL_0));
480 temp &= 0xFFFF0FFF;
481 out_le32((u32 *)(bridge_base + MV64x60_MPP_CNTL_0), temp);
482
483 temp = in_le32((u32 *)(bridge_base + MV64x60_GPP_LEVEL_CNTL));
484 temp |= 0x00000004;
485 out_le32((u32 *)(bridge_base + MV64x60_GPP_LEVEL_CNTL), temp);
486
487 temp = in_le32((u32 *)(bridge_base + MV64x60_GPP_IO_CNTL));
488 temp |= 0x00000004;
489 out_le32((u32 *)(bridge_base + MV64x60_GPP_IO_CNTL), temp);
490
491 temp = in_le32((u32 *)(bridge_base + MV64x60_MPP_CNTL_2));
492 temp &= 0xFFFF0FFF;
493 out_le32((u32 *)(bridge_base + MV64x60_MPP_CNTL_2), temp);
494
495 temp = in_le32((u32 *)(bridge_base + MV64x60_GPP_LEVEL_CNTL));
496 temp |= 0x00080000;
497 out_le32((u32 *)(bridge_base + MV64x60_GPP_LEVEL_CNTL), temp);
498
499 temp = in_le32((u32 *)(bridge_base + MV64x60_GPP_IO_CNTL));
500 temp |= 0x00080000;
501 out_le32((u32 *)(bridge_base + MV64x60_GPP_IO_CNTL), temp);
502
503 out_le32((u32 *)(bridge_base + MV64x60_GPP_VALUE_SET),
504 0x00080004);
505 }
506
507 for (;;);
508}
509
510#define HEAP_SIZE (16*MB)
511static struct gunzip_state gzstate;
512
513void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
514 unsigned long r6, unsigned long r7)
515{
516 struct elf_info ei;
517 char *heap_start, *dtb;
518 int dt_size = _dtb_end - _dtb_start;
519 void *vmlinuz_addr = _vmlinux_start;
520 unsigned long vmlinuz_size = _vmlinux_end - _vmlinux_start;
521 char elfheader[256];
522
523 if (dt_size <= 0) /* No fdt */
524 exit();
525
526 /*
527 * Start heap after end of the kernel (after decompressed to
528 * address 0) or the end of the zImage, whichever is higher.
529 * That's so things allocated by simple_alloc won't overwrite
530 * any part of the zImage and the kernel won't overwrite the dtb
531 * when decompressed & relocated.
532 */
533 gunzip_start(&gzstate, vmlinuz_addr, vmlinuz_size);
534 gunzip_exactly(&gzstate, elfheader, sizeof(elfheader));
535
536 if (!parse_elf32(elfheader, &ei))
537 exit();
538
539 heap_start = (char *)(ei.memsize + ei.elfoffset); /* end of kernel*/
540 heap_start = max(heap_start, (char *)_end); /* end of zImage */
541
542 if ((unsigned)simple_alloc_init(heap_start, HEAP_SIZE, 2*KB, 16)
543 > (128*MB))
544 exit();
545
546 /* Relocate dtb to safe area past end of zImage & kernel */
547 dtb = malloc(dt_size);
548 if (!dtb)
549 exit();
550 memmove(dtb, _dtb_start, dt_size);
2f0dfeaa 551 fdt_init(dtb);
c368d921
MG		 552
553 bridge_base = mv64x60_get_bridge_base();
554
555 platform_ops.fixups = prpmc2800_fixups;
556 platform_ops.exit = prpmc2800_reset;
557
558 if (serial_console_init() < 0)
559 exit();
560}
561
562/* _zimage_start called very early--need to turn off external interrupts */
563asm (" .globl _zimage_start\n\
564 _zimage_start:\n\
565 mfmsr 10\n\
566 rlwinm 10,10,0,~(1<<15) /* Clear MSR_EE */\n\
567 sync\n\
568 mtmsr 10\n\
569 isync\n\
570 b _zimage_start_lib\n\
571");
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