mips/panic: replace smp_send_stop() with kdump friendly version in panic path
[cascardo/linux.git] / arch / mips / cavium-octeon / setup.c
1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License.  See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * Copyright (C) 2004-2007 Cavium Networks
7  * Copyright (C) 2008, 2009 Wind River Systems
8  *   written by Ralf Baechle <ralf@linux-mips.org>
9  */
10 #include <linux/compiler.h>
11 #include <linux/vmalloc.h>
12 #include <linux/init.h>
13 #include <linux/kernel.h>
14 #include <linux/console.h>
15 #include <linux/delay.h>
16 #include <linux/export.h>
17 #include <linux/interrupt.h>
18 #include <linux/io.h>
19 #include <linux/serial.h>
20 #include <linux/smp.h>
21 #include <linux/types.h>
22 #include <linux/string.h>       /* for memset */
23 #include <linux/tty.h>
24 #include <linux/time.h>
25 #include <linux/platform_device.h>
26 #include <linux/serial_core.h>
27 #include <linux/serial_8250.h>
28 #include <linux/of_fdt.h>
29 #include <linux/libfdt.h>
30 #include <linux/kexec.h>
31
32 #include <asm/processor.h>
33 #include <asm/reboot.h>
34 #include <asm/smp-ops.h>
35 #include <asm/irq_cpu.h>
36 #include <asm/mipsregs.h>
37 #include <asm/bootinfo.h>
38 #include <asm/sections.h>
39 #include <asm/time.h>
40
41 #include <asm/octeon/octeon.h>
42 #include <asm/octeon/pci-octeon.h>
43 #include <asm/octeon/cvmx-rst-defs.h>
44
45 /*
46  * TRUE for devices having registers with little-endian byte
47  * order, FALSE for registers with native-endian byte order.
48  * PCI mandates little-endian, USB and SATA are configuraable,
49  * but we chose little-endian for these.
50  */
51 const bool octeon_should_swizzle_table[256] = {
52         [0x00] = true,  /* bootbus/CF */
53         [0x1b] = true,  /* PCI mmio window */
54         [0x1c] = true,  /* PCI mmio window */
55         [0x1d] = true,  /* PCI mmio window */
56         [0x1e] = true,  /* PCI mmio window */
57         [0x68] = true,  /* OCTEON III USB */
58         [0x69] = true,  /* OCTEON III USB */
59         [0x6c] = true,  /* OCTEON III SATA */
60         [0x6f] = true,  /* OCTEON II USB */
61 };
62 EXPORT_SYMBOL(octeon_should_swizzle_table);
63
64 #ifdef CONFIG_PCI
65 extern void pci_console_init(const char *arg);
66 #endif
67
68 static unsigned long long MAX_MEMORY = 512ull << 20;
69
70 DEFINE_SEMAPHORE(octeon_bootbus_sem);
71 EXPORT_SYMBOL(octeon_bootbus_sem);
72
73 struct octeon_boot_descriptor *octeon_boot_desc_ptr;
74
75 struct cvmx_bootinfo *octeon_bootinfo;
76 EXPORT_SYMBOL(octeon_bootinfo);
77
78 static unsigned long long RESERVE_LOW_MEM = 0ull;
79 #ifdef CONFIG_KEXEC
80 #ifdef CONFIG_SMP
81 /*
82  * Wait for relocation code is prepared and send
83  * secondary CPUs to spin until kernel is relocated.
84  */
85 static void octeon_kexec_smp_down(void *ignored)
86 {
87         int cpu = smp_processor_id();
88
89         local_irq_disable();
90         set_cpu_online(cpu, false);
91         while (!atomic_read(&kexec_ready_to_reboot))
92                 cpu_relax();
93
94         asm volatile (
95         "       sync                                            \n"
96         "       synci   ($0)                                    \n");
97
98         relocated_kexec_smp_wait(NULL);
99 }
100 #endif
101
102 #define OCTEON_DDR0_BASE    (0x0ULL)
103 #define OCTEON_DDR0_SIZE    (0x010000000ULL)
104 #define OCTEON_DDR1_BASE    (0x410000000ULL)
105 #define OCTEON_DDR1_SIZE    (0x010000000ULL)
106 #define OCTEON_DDR2_BASE    (0x020000000ULL)
107 #define OCTEON_DDR2_SIZE    (0x3e0000000ULL)
108 #define OCTEON_MAX_PHY_MEM_SIZE (16*1024*1024*1024ULL)
109
110 static struct kimage *kimage_ptr;
111
112 static void kexec_bootmem_init(uint64_t mem_size, uint32_t low_reserved_bytes)
113 {
114         int64_t addr;
115         struct cvmx_bootmem_desc *bootmem_desc;
116
117         bootmem_desc = cvmx_bootmem_get_desc();
118
119         if (mem_size > OCTEON_MAX_PHY_MEM_SIZE) {
120                 mem_size = OCTEON_MAX_PHY_MEM_SIZE;
121                 pr_err("Error: requested memory too large,"
122                        "truncating to maximum size\n");
123         }
124
125         bootmem_desc->major_version = CVMX_BOOTMEM_DESC_MAJ_VER;
126         bootmem_desc->minor_version = CVMX_BOOTMEM_DESC_MIN_VER;
127
128         addr = (OCTEON_DDR0_BASE + RESERVE_LOW_MEM + low_reserved_bytes);
129         bootmem_desc->head_addr = 0;
130
131         if (mem_size <= OCTEON_DDR0_SIZE) {
132                 __cvmx_bootmem_phy_free(addr,
133                                 mem_size - RESERVE_LOW_MEM -
134                                 low_reserved_bytes, 0);
135                 return;
136         }
137
138         __cvmx_bootmem_phy_free(addr,
139                         OCTEON_DDR0_SIZE - RESERVE_LOW_MEM -
140                         low_reserved_bytes, 0);
141
142         mem_size -= OCTEON_DDR0_SIZE;
143
144         if (mem_size > OCTEON_DDR1_SIZE) {
145                 __cvmx_bootmem_phy_free(OCTEON_DDR1_BASE, OCTEON_DDR1_SIZE, 0);
146                 __cvmx_bootmem_phy_free(OCTEON_DDR2_BASE,
147                                 mem_size - OCTEON_DDR1_SIZE, 0);
148         } else
149                 __cvmx_bootmem_phy_free(OCTEON_DDR1_BASE, mem_size, 0);
150 }
151
152 static int octeon_kexec_prepare(struct kimage *image)
153 {
154         int i;
155         char *bootloader = "kexec";
156
157         octeon_boot_desc_ptr->argc = 0;
158         for (i = 0; i < image->nr_segments; i++) {
159                 if (!strncmp(bootloader, (char *)image->segment[i].buf,
160                                 strlen(bootloader))) {
161                         /*
162                          * convert command line string to array
163                          * of parameters (as bootloader does).
164                          */
165                         int argc = 0, offt;
166                         char *str = (char *)image->segment[i].buf;
167                         char *ptr = strchr(str, ' ');
168                         while (ptr && (OCTEON_ARGV_MAX_ARGS > argc)) {
169                                 *ptr = '\0';
170                                 if (ptr[1] != ' ') {
171                                         offt = (int)(ptr - str + 1);
172                                         octeon_boot_desc_ptr->argv[argc] =
173                                                 image->segment[i].mem + offt;
174                                         argc++;
175                                 }
176                                 ptr = strchr(ptr + 1, ' ');
177                         }
178                         octeon_boot_desc_ptr->argc = argc;
179                         break;
180                 }
181         }
182
183         /*
184          * Information about segments will be needed during pre-boot memory
185          * initialization.
186          */
187         kimage_ptr = image;
188         return 0;
189 }
190
191 static void octeon_generic_shutdown(void)
192 {
193         int i;
194 #ifdef CONFIG_SMP
195         int cpu;
196 #endif
197         struct cvmx_bootmem_desc *bootmem_desc;
198         void *named_block_array_ptr;
199
200         bootmem_desc = cvmx_bootmem_get_desc();
201         named_block_array_ptr =
202                 cvmx_phys_to_ptr(bootmem_desc->named_block_array_addr);
203
204 #ifdef CONFIG_SMP
205         /* disable watchdogs */
206         for_each_online_cpu(cpu)
207                 cvmx_write_csr(CVMX_CIU_WDOGX(cpu_logical_map(cpu)), 0);
208 #else
209         cvmx_write_csr(CVMX_CIU_WDOGX(cvmx_get_core_num()), 0);
210 #endif
211         if (kimage_ptr != kexec_crash_image) {
212                 memset(named_block_array_ptr,
213                         0x0,
214                         CVMX_BOOTMEM_NUM_NAMED_BLOCKS *
215                         sizeof(struct cvmx_bootmem_named_block_desc));
216                 /*
217                  * Mark all memory (except low 0x100000 bytes) as free.
218                  * It is the same thing that bootloader does.
219                  */
220                 kexec_bootmem_init(octeon_bootinfo->dram_size*1024ULL*1024ULL,
221                                 0x100000);
222                 /*
223                  * Allocate all segments to avoid their corruption during boot.
224                  */
225                 for (i = 0; i < kimage_ptr->nr_segments; i++)
226                         cvmx_bootmem_alloc_address(
227                                 kimage_ptr->segment[i].memsz + 2*PAGE_SIZE,
228                                 kimage_ptr->segment[i].mem - PAGE_SIZE,
229                                 PAGE_SIZE);
230         } else {
231                 /*
232                  * Do not mark all memory as free. Free only named sections
233                  * leaving the rest of memory unchanged.
234                  */
235                 struct cvmx_bootmem_named_block_desc *ptr =
236                         (struct cvmx_bootmem_named_block_desc *)
237                         named_block_array_ptr;
238
239                 for (i = 0; i < bootmem_desc->named_block_num_blocks; i++)
240                         if (ptr[i].size)
241                                 cvmx_bootmem_free_named(ptr[i].name);
242         }
243         kexec_args[2] = 1UL; /* running on octeon_main_processor */
244         kexec_args[3] = (unsigned long)octeon_boot_desc_ptr;
245 #ifdef CONFIG_SMP
246         secondary_kexec_args[2] = 0UL; /* running on secondary cpu */
247         secondary_kexec_args[3] = (unsigned long)octeon_boot_desc_ptr;
248 #endif
249 }
250
251 static void octeon_shutdown(void)
252 {
253         octeon_generic_shutdown();
254 #ifdef CONFIG_SMP
255         smp_call_function(octeon_kexec_smp_down, NULL, 0);
256         smp_wmb();
257         while (num_online_cpus() > 1) {
258                 cpu_relax();
259                 mdelay(1);
260         }
261 #endif
262 }
263
264 static void octeon_crash_shutdown(struct pt_regs *regs)
265 {
266         octeon_generic_shutdown();
267         default_machine_crash_shutdown(regs);
268 }
269
270 #ifdef CONFIG_SMP
271 void octeon_crash_smp_send_stop(void)
272 {
273         int cpu;
274
275         /* disable watchdogs */
276         for_each_online_cpu(cpu)
277                 cvmx_write_csr(CVMX_CIU_WDOGX(cpu_logical_map(cpu)), 0);
278 }
279 #endif
280
281 #endif /* CONFIG_KEXEC */
282
283 #ifdef CONFIG_CAVIUM_RESERVE32
284 uint64_t octeon_reserve32_memory;
285 EXPORT_SYMBOL(octeon_reserve32_memory);
286 #endif
287
288 #ifdef CONFIG_KEXEC
289 /* crashkernel cmdline parameter is parsed _after_ memory setup
290  * we also parse it here (workaround for EHB5200) */
291 static uint64_t crashk_size, crashk_base;
292 #endif
293
294 static int octeon_uart;
295
296 extern asmlinkage void handle_int(void);
297
298 /**
299  * Return non zero if we are currently running in the Octeon simulator
300  *
301  * Returns
302  */
303 int octeon_is_simulation(void)
304 {
305         return octeon_bootinfo->board_type == CVMX_BOARD_TYPE_SIM;
306 }
307 EXPORT_SYMBOL(octeon_is_simulation);
308
309 /**
310  * Return true if Octeon is in PCI Host mode. This means
311  * Linux can control the PCI bus.
312  *
313  * Returns Non zero if Octeon in host mode.
314  */
315 int octeon_is_pci_host(void)
316 {
317 #ifdef CONFIG_PCI
318         return octeon_bootinfo->config_flags & CVMX_BOOTINFO_CFG_FLAG_PCI_HOST;
319 #else
320         return 0;
321 #endif
322 }
323
324 /**
325  * Get the clock rate of Octeon
326  *
327  * Returns Clock rate in HZ
328  */
329 uint64_t octeon_get_clock_rate(void)
330 {
331         struct cvmx_sysinfo *sysinfo = cvmx_sysinfo_get();
332
333         return sysinfo->cpu_clock_hz;
334 }
335 EXPORT_SYMBOL(octeon_get_clock_rate);
336
337 static u64 octeon_io_clock_rate;
338
339 u64 octeon_get_io_clock_rate(void)
340 {
341         return octeon_io_clock_rate;
342 }
343 EXPORT_SYMBOL(octeon_get_io_clock_rate);
344
345
346 /**
347  * Write to the LCD display connected to the bootbus. This display
348  * exists on most Cavium evaluation boards. If it doesn't exist, then
349  * this function doesn't do anything.
350  *
351  * @s:      String to write
352  */
353 void octeon_write_lcd(const char *s)
354 {
355         if (octeon_bootinfo->led_display_base_addr) {
356                 void __iomem *lcd_address =
357                         ioremap_nocache(octeon_bootinfo->led_display_base_addr,
358                                         8);
359                 int i;
360                 for (i = 0; i < 8; i++, s++) {
361                         if (*s)
362                                 iowrite8(*s, lcd_address + i);
363                         else
364                                 iowrite8(' ', lcd_address + i);
365                 }
366                 iounmap(lcd_address);
367         }
368 }
369
370 /**
371  * Return the console uart passed by the bootloader
372  *
373  * Returns uart   (0 or 1)
374  */
375 int octeon_get_boot_uart(void)
376 {
377         int uart;
378 #ifdef CONFIG_CAVIUM_OCTEON_2ND_KERNEL
379         uart = 1;
380 #else
381         uart = (octeon_boot_desc_ptr->flags & OCTEON_BL_FLAG_CONSOLE_UART1) ?
382                 1 : 0;
383 #endif
384         return uart;
385 }
386
387 /**
388  * Get the coremask Linux was booted on.
389  *
390  * Returns Core mask
391  */
392 int octeon_get_boot_coremask(void)
393 {
394         return octeon_boot_desc_ptr->core_mask;
395 }
396
397 /**
398  * Check the hardware BIST results for a CPU
399  */
400 void octeon_check_cpu_bist(void)
401 {
402         const int coreid = cvmx_get_core_num();
403         unsigned long long mask;
404         unsigned long long bist_val;
405
406         /* Check BIST results for COP0 registers */
407         mask = 0x1f00000000ull;
408         bist_val = read_octeon_c0_icacheerr();
409         if (bist_val & mask)
410                 pr_err("Core%d BIST Failure: CacheErr(icache) = 0x%llx\n",
411                        coreid, bist_val);
412
413         bist_val = read_octeon_c0_dcacheerr();
414         if (bist_val & 1)
415                 pr_err("Core%d L1 Dcache parity error: "
416                        "CacheErr(dcache) = 0x%llx\n",
417                        coreid, bist_val);
418
419         mask = 0xfc00000000000000ull;
420         bist_val = read_c0_cvmmemctl();
421         if (bist_val & mask)
422                 pr_err("Core%d BIST Failure: COP0_CVM_MEM_CTL = 0x%llx\n",
423                        coreid, bist_val);
424
425         write_octeon_c0_dcacheerr(0);
426 }
427
428 /**
429  * Reboot Octeon
430  *
431  * @command: Command to pass to the bootloader. Currently ignored.
432  */
433 static void octeon_restart(char *command)
434 {
435         /* Disable all watchdogs before soft reset. They don't get cleared */
436 #ifdef CONFIG_SMP
437         int cpu;
438         for_each_online_cpu(cpu)
439                 cvmx_write_csr(CVMX_CIU_WDOGX(cpu_logical_map(cpu)), 0);
440 #else
441         cvmx_write_csr(CVMX_CIU_WDOGX(cvmx_get_core_num()), 0);
442 #endif
443
444         mb();
445         while (1)
446                 if (OCTEON_IS_OCTEON3())
447                         cvmx_write_csr(CVMX_RST_SOFT_RST, 1);
448                 else
449                         cvmx_write_csr(CVMX_CIU_SOFT_RST, 1);
450 }
451
452
453 /**
454  * Permanently stop a core.
455  *
456  * @arg: Ignored.
457  */
458 static void octeon_kill_core(void *arg)
459 {
460         if (octeon_is_simulation())
461                 /* A break instruction causes the simulator stop a core */
462                 asm volatile ("break" ::: "memory");
463
464         local_irq_disable();
465         /* Disable watchdog on this core. */
466         cvmx_write_csr(CVMX_CIU_WDOGX(cvmx_get_core_num()), 0);
467         /* Spin in a low power mode. */
468         while (true)
469                 asm volatile ("wait" ::: "memory");
470 }
471
472
473 /**
474  * Halt the system
475  */
476 static void octeon_halt(void)
477 {
478         smp_call_function(octeon_kill_core, NULL, 0);
479
480         switch (octeon_bootinfo->board_type) {
481         case CVMX_BOARD_TYPE_NAO38:
482                 /* Driving a 1 to GPIO 12 shuts off this board */
483                 cvmx_write_csr(CVMX_GPIO_BIT_CFGX(12), 1);
484                 cvmx_write_csr(CVMX_GPIO_TX_SET, 0x1000);
485                 break;
486         default:
487                 octeon_write_lcd("PowerOff");
488                 break;
489         }
490
491         octeon_kill_core(NULL);
492 }
493
494 static char __read_mostly octeon_system_type[80];
495
496 static void __init init_octeon_system_type(void)
497 {
498         char const *board_type;
499
500         board_type = cvmx_board_type_to_string(octeon_bootinfo->board_type);
501         if (board_type == NULL) {
502                 struct device_node *root;
503                 int ret;
504
505                 root = of_find_node_by_path("/");
506                 ret = of_property_read_string(root, "model", &board_type);
507                 of_node_put(root);
508                 if (ret)
509                         board_type = "Unsupported Board";
510         }
511
512         snprintf(octeon_system_type, sizeof(octeon_system_type), "%s (%s)",
513                  board_type, octeon_model_get_string(read_c0_prid()));
514 }
515
516 /**
517  * Return a string representing the system type
518  *
519  * Returns
520  */
521 const char *octeon_board_type_string(void)
522 {
523         return octeon_system_type;
524 }
525
526 const char *get_system_type(void)
527         __attribute__ ((alias("octeon_board_type_string")));
528
529 void octeon_user_io_init(void)
530 {
531         union octeon_cvmemctl cvmmemctl;
532
533         /* Get the current settings for CP0_CVMMEMCTL_REG */
534         cvmmemctl.u64 = read_c0_cvmmemctl();
535         /* R/W If set, marked write-buffer entries time out the same
536          * as as other entries; if clear, marked write-buffer entries
537          * use the maximum timeout. */
538         cvmmemctl.s.dismarkwblongto = 1;
539         /* R/W If set, a merged store does not clear the write-buffer
540          * entry timeout state. */
541         cvmmemctl.s.dismrgclrwbto = 0;
542         /* R/W Two bits that are the MSBs of the resultant CVMSEG LM
543          * word location for an IOBDMA. The other 8 bits come from the
544          * SCRADDR field of the IOBDMA. */
545         cvmmemctl.s.iobdmascrmsb = 0;
546         /* R/W If set, SYNCWS and SYNCS only order marked stores; if
547          * clear, SYNCWS and SYNCS only order unmarked
548          * stores. SYNCWSMARKED has no effect when DISSYNCWS is
549          * set. */
550         cvmmemctl.s.syncwsmarked = 0;
551         /* R/W If set, SYNCWS acts as SYNCW and SYNCS acts as SYNC. */
552         cvmmemctl.s.dissyncws = 0;
553         /* R/W If set, no stall happens on write buffer full. */
554         if (OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2))
555                 cvmmemctl.s.diswbfst = 1;
556         else
557                 cvmmemctl.s.diswbfst = 0;
558         /* R/W If set (and SX set), supervisor-level loads/stores can
559          * use XKPHYS addresses with <48>==0 */
560         cvmmemctl.s.xkmemenas = 0;
561
562         /* R/W If set (and UX set), user-level loads/stores can use
563          * XKPHYS addresses with VA<48>==0 */
564         cvmmemctl.s.xkmemenau = 0;
565
566         /* R/W If set (and SX set), supervisor-level loads/stores can
567          * use XKPHYS addresses with VA<48>==1 */
568         cvmmemctl.s.xkioenas = 0;
569
570         /* R/W If set (and UX set), user-level loads/stores can use
571          * XKPHYS addresses with VA<48>==1 */
572         cvmmemctl.s.xkioenau = 0;
573
574         /* R/W If set, all stores act as SYNCW (NOMERGE must be set
575          * when this is set) RW, reset to 0. */
576         cvmmemctl.s.allsyncw = 0;
577
578         /* R/W If set, no stores merge, and all stores reach the
579          * coherent bus in order. */
580         cvmmemctl.s.nomerge = 0;
581         /* R/W Selects the bit in the counter used for DID time-outs 0
582          * = 231, 1 = 230, 2 = 229, 3 = 214. Actual time-out is
583          * between 1x and 2x this interval. For example, with
584          * DIDTTO=3, expiration interval is between 16K and 32K. */
585         cvmmemctl.s.didtto = 0;
586         /* R/W If set, the (mem) CSR clock never turns off. */
587         cvmmemctl.s.csrckalwys = 0;
588         /* R/W If set, mclk never turns off. */
589         cvmmemctl.s.mclkalwys = 0;
590         /* R/W Selects the bit in the counter used for write buffer
591          * flush time-outs (WBFLT+11) is the bit position in an
592          * internal counter used to determine expiration. The write
593          * buffer expires between 1x and 2x this interval. For
594          * example, with WBFLT = 0, a write buffer expires between 2K
595          * and 4K cycles after the write buffer entry is allocated. */
596         cvmmemctl.s.wbfltime = 0;
597         /* R/W If set, do not put Istream in the L2 cache. */
598         cvmmemctl.s.istrnol2 = 0;
599
600         /*
601          * R/W The write buffer threshold. As per erratum Core-14752
602          * for CN63XX, a sc/scd might fail if the write buffer is
603          * full.  Lowering WBTHRESH greatly lowers the chances of the
604          * write buffer ever being full and triggering the erratum.
605          */
606         if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_X))
607                 cvmmemctl.s.wbthresh = 4;
608         else
609                 cvmmemctl.s.wbthresh = 10;
610
611         /* R/W If set, CVMSEG is available for loads/stores in
612          * kernel/debug mode. */
613 #if CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0
614         cvmmemctl.s.cvmsegenak = 1;
615 #else
616         cvmmemctl.s.cvmsegenak = 0;
617 #endif
618         /* R/W If set, CVMSEG is available for loads/stores in
619          * supervisor mode. */
620         cvmmemctl.s.cvmsegenas = 0;
621         /* R/W If set, CVMSEG is available for loads/stores in user
622          * mode. */
623         cvmmemctl.s.cvmsegenau = 0;
624
625         write_c0_cvmmemctl(cvmmemctl.u64);
626
627         /* Setup of CVMSEG is done in kernel-entry-init.h */
628         if (smp_processor_id() == 0)
629                 pr_notice("CVMSEG size: %d cache lines (%d bytes)\n",
630                           CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE,
631                           CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE * 128);
632
633         if (octeon_has_feature(OCTEON_FEATURE_FAU)) {
634                 union cvmx_iob_fau_timeout fau_timeout;
635
636                 /* Set a default for the hardware timeouts */
637                 fau_timeout.u64 = 0;
638                 fau_timeout.s.tout_val = 0xfff;
639                 /* Disable tagwait FAU timeout */
640                 fau_timeout.s.tout_enb = 0;
641                 cvmx_write_csr(CVMX_IOB_FAU_TIMEOUT, fau_timeout.u64);
642         }
643
644         if ((!OCTEON_IS_MODEL(OCTEON_CN68XX) &&
645              !OCTEON_IS_MODEL(OCTEON_CN7XXX)) ||
646             OCTEON_IS_MODEL(OCTEON_CN70XX)) {
647                 union cvmx_pow_nw_tim nm_tim;
648
649                 nm_tim.u64 = 0;
650                 /* 4096 cycles */
651                 nm_tim.s.nw_tim = 3;
652                 cvmx_write_csr(CVMX_POW_NW_TIM, nm_tim.u64);
653         }
654
655         write_octeon_c0_icacheerr(0);
656         write_c0_derraddr1(0);
657 }
658
659 /**
660  * Early entry point for arch setup
661  */
662 void __init prom_init(void)
663 {
664         struct cvmx_sysinfo *sysinfo;
665         const char *arg;
666         char *p;
667         int i;
668         u64 t;
669         int argc;
670 #ifdef CONFIG_CAVIUM_RESERVE32
671         int64_t addr = -1;
672 #endif
673         /*
674          * The bootloader passes a pointer to the boot descriptor in
675          * $a3, this is available as fw_arg3.
676          */
677         octeon_boot_desc_ptr = (struct octeon_boot_descriptor *)fw_arg3;
678         octeon_bootinfo =
679                 cvmx_phys_to_ptr(octeon_boot_desc_ptr->cvmx_desc_vaddr);
680         cvmx_bootmem_init(cvmx_phys_to_ptr(octeon_bootinfo->phy_mem_desc_addr));
681
682         sysinfo = cvmx_sysinfo_get();
683         memset(sysinfo, 0, sizeof(*sysinfo));
684         sysinfo->system_dram_size = octeon_bootinfo->dram_size << 20;
685         sysinfo->phy_mem_desc_addr = (u64)phys_to_virt(octeon_bootinfo->phy_mem_desc_addr);
686
687         if ((octeon_bootinfo->major_version > 1) ||
688             (octeon_bootinfo->major_version == 1 &&
689              octeon_bootinfo->minor_version >= 4))
690                 cvmx_coremask_copy(&sysinfo->core_mask,
691                                    &octeon_bootinfo->ext_core_mask);
692         else
693                 cvmx_coremask_set64(&sysinfo->core_mask,
694                                     octeon_bootinfo->core_mask);
695
696         /* Some broken u-boot pass garbage in upper bits, clear them out */
697         if (!OCTEON_IS_MODEL(OCTEON_CN78XX))
698                 for (i = 512; i < 1024; i++)
699                         cvmx_coremask_clear_core(&sysinfo->core_mask, i);
700
701         sysinfo->exception_base_addr = octeon_bootinfo->exception_base_addr;
702         sysinfo->cpu_clock_hz = octeon_bootinfo->eclock_hz;
703         sysinfo->dram_data_rate_hz = octeon_bootinfo->dclock_hz * 2;
704         sysinfo->board_type = octeon_bootinfo->board_type;
705         sysinfo->board_rev_major = octeon_bootinfo->board_rev_major;
706         sysinfo->board_rev_minor = octeon_bootinfo->board_rev_minor;
707         memcpy(sysinfo->mac_addr_base, octeon_bootinfo->mac_addr_base,
708                sizeof(sysinfo->mac_addr_base));
709         sysinfo->mac_addr_count = octeon_bootinfo->mac_addr_count;
710         memcpy(sysinfo->board_serial_number,
711                octeon_bootinfo->board_serial_number,
712                sizeof(sysinfo->board_serial_number));
713         sysinfo->compact_flash_common_base_addr =
714                 octeon_bootinfo->compact_flash_common_base_addr;
715         sysinfo->compact_flash_attribute_base_addr =
716                 octeon_bootinfo->compact_flash_attribute_base_addr;
717         sysinfo->led_display_base_addr = octeon_bootinfo->led_display_base_addr;
718         sysinfo->dfa_ref_clock_hz = octeon_bootinfo->dfa_ref_clock_hz;
719         sysinfo->bootloader_config_flags = octeon_bootinfo->config_flags;
720
721         if (OCTEON_IS_OCTEON2()) {
722                 /* I/O clock runs at a different rate than the CPU. */
723                 union cvmx_mio_rst_boot rst_boot;
724                 rst_boot.u64 = cvmx_read_csr(CVMX_MIO_RST_BOOT);
725                 octeon_io_clock_rate = 50000000 * rst_boot.s.pnr_mul;
726         } else if (OCTEON_IS_OCTEON3()) {
727                 /* I/O clock runs at a different rate than the CPU. */
728                 union cvmx_rst_boot rst_boot;
729                 rst_boot.u64 = cvmx_read_csr(CVMX_RST_BOOT);
730                 octeon_io_clock_rate = 50000000 * rst_boot.s.pnr_mul;
731         } else {
732                 octeon_io_clock_rate = sysinfo->cpu_clock_hz;
733         }
734
735         t = read_c0_cvmctl();
736         if ((t & (1ull << 27)) == 0) {
737                 /*
738                  * Setup the multiplier save/restore code if
739                  * CvmCtl[NOMUL] clear.
740                  */
741                 void *save;
742                 void *save_end;
743                 void *restore;
744                 void *restore_end;
745                 int save_len;
746                 int restore_len;
747                 int save_max = (char *)octeon_mult_save_end -
748                         (char *)octeon_mult_save;
749                 int restore_max = (char *)octeon_mult_restore_end -
750                         (char *)octeon_mult_restore;
751                 if (current_cpu_data.cputype == CPU_CAVIUM_OCTEON3) {
752                         save = octeon_mult_save3;
753                         save_end = octeon_mult_save3_end;
754                         restore = octeon_mult_restore3;
755                         restore_end = octeon_mult_restore3_end;
756                 } else {
757                         save = octeon_mult_save2;
758                         save_end = octeon_mult_save2_end;
759                         restore = octeon_mult_restore2;
760                         restore_end = octeon_mult_restore2_end;
761                 }
762                 save_len = (char *)save_end - (char *)save;
763                 restore_len = (char *)restore_end - (char *)restore;
764                 if (!WARN_ON(save_len > save_max ||
765                                 restore_len > restore_max)) {
766                         memcpy(octeon_mult_save, save, save_len);
767                         memcpy(octeon_mult_restore, restore, restore_len);
768                 }
769         }
770
771         /*
772          * Only enable the LED controller if we're running on a CN38XX, CN58XX,
773          * or CN56XX. The CN30XX and CN31XX don't have an LED controller.
774          */
775         if (!octeon_is_simulation() &&
776             octeon_has_feature(OCTEON_FEATURE_LED_CONTROLLER)) {
777                 cvmx_write_csr(CVMX_LED_EN, 0);
778                 cvmx_write_csr(CVMX_LED_PRT, 0);
779                 cvmx_write_csr(CVMX_LED_DBG, 0);
780                 cvmx_write_csr(CVMX_LED_PRT_FMT, 0);
781                 cvmx_write_csr(CVMX_LED_UDD_CNTX(0), 32);
782                 cvmx_write_csr(CVMX_LED_UDD_CNTX(1), 32);
783                 cvmx_write_csr(CVMX_LED_UDD_DATX(0), 0);
784                 cvmx_write_csr(CVMX_LED_UDD_DATX(1), 0);
785                 cvmx_write_csr(CVMX_LED_EN, 1);
786         }
787 #ifdef CONFIG_CAVIUM_RESERVE32
788         /*
789          * We need to temporarily allocate all memory in the reserve32
790          * region. This makes sure the kernel doesn't allocate this
791          * memory when it is getting memory from the
792          * bootloader. Later, after the memory allocations are
793          * complete, the reserve32 will be freed.
794          *
795          * Allocate memory for RESERVED32 aligned on 2MB boundary. This
796          * is in case we later use hugetlb entries with it.
797          */
798         addr = cvmx_bootmem_phy_named_block_alloc(CONFIG_CAVIUM_RESERVE32 << 20,
799                                                 0, 0, 2 << 20,
800                                                 "CAVIUM_RESERVE32", 0);
801         if (addr < 0)
802                 pr_err("Failed to allocate CAVIUM_RESERVE32 memory area\n");
803         else
804                 octeon_reserve32_memory = addr;
805 #endif
806
807 #ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2
808         if (cvmx_read_csr(CVMX_L2D_FUS3) & (3ull << 34)) {
809                 pr_info("Skipping L2 locking due to reduced L2 cache size\n");
810         } else {
811                 uint32_t __maybe_unused ebase = read_c0_ebase() & 0x3ffff000;
812 #ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_TLB
813                 /* TLB refill */
814                 cvmx_l2c_lock_mem_region(ebase, 0x100);
815 #endif
816 #ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_EXCEPTION
817                 /* General exception */
818                 cvmx_l2c_lock_mem_region(ebase + 0x180, 0x80);
819 #endif
820 #ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_LOW_LEVEL_INTERRUPT
821                 /* Interrupt handler */
822                 cvmx_l2c_lock_mem_region(ebase + 0x200, 0x80);
823 #endif
824 #ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_INTERRUPT
825                 cvmx_l2c_lock_mem_region(__pa_symbol(handle_int), 0x100);
826                 cvmx_l2c_lock_mem_region(__pa_symbol(plat_irq_dispatch), 0x80);
827 #endif
828 #ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_MEMCPY
829                 cvmx_l2c_lock_mem_region(__pa_symbol(memcpy), 0x480);
830 #endif
831         }
832 #endif
833
834         octeon_check_cpu_bist();
835
836         octeon_uart = octeon_get_boot_uart();
837
838 #ifdef CONFIG_SMP
839         octeon_write_lcd("LinuxSMP");
840 #else
841         octeon_write_lcd("Linux");
842 #endif
843
844         octeon_setup_delays();
845
846         /*
847          * BIST should always be enabled when doing a soft reset. L2
848          * Cache locking for instance is not cleared unless BIST is
849          * enabled.  Unfortunately due to a chip errata G-200 for
850          * Cn38XX and CN31XX, BIST msut be disabled on these parts.
851          */
852         if (OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2) ||
853             OCTEON_IS_MODEL(OCTEON_CN31XX))
854                 cvmx_write_csr(CVMX_CIU_SOFT_BIST, 0);
855         else
856                 cvmx_write_csr(CVMX_CIU_SOFT_BIST, 1);
857
858         /* Default to 64MB in the simulator to speed things up */
859         if (octeon_is_simulation())
860                 MAX_MEMORY = 64ull << 20;
861
862         arg = strstr(arcs_cmdline, "mem=");
863         if (arg) {
864                 MAX_MEMORY = memparse(arg + 4, &p);
865                 if (MAX_MEMORY == 0)
866                         MAX_MEMORY = 32ull << 30;
867                 if (*p == '@')
868                         RESERVE_LOW_MEM = memparse(p + 1, &p);
869         }
870
871         arcs_cmdline[0] = 0;
872         argc = octeon_boot_desc_ptr->argc;
873         for (i = 0; i < argc; i++) {
874                 const char *arg =
875                         cvmx_phys_to_ptr(octeon_boot_desc_ptr->argv[i]);
876                 if ((strncmp(arg, "MEM=", 4) == 0) ||
877                     (strncmp(arg, "mem=", 4) == 0)) {
878                         MAX_MEMORY = memparse(arg + 4, &p);
879                         if (MAX_MEMORY == 0)
880                                 MAX_MEMORY = 32ull << 30;
881                         if (*p == '@')
882                                 RESERVE_LOW_MEM = memparse(p + 1, &p);
883 #ifdef CONFIG_KEXEC
884                 } else if (strncmp(arg, "crashkernel=", 12) == 0) {
885                         crashk_size = memparse(arg+12, &p);
886                         if (*p == '@')
887                                 crashk_base = memparse(p+1, &p);
888                         strcat(arcs_cmdline, " ");
889                         strcat(arcs_cmdline, arg);
890                         /*
891                          * To do: switch parsing to new style, something like:
892                          * parse_crashkernel(arg, sysinfo->system_dram_size,
893                          *                &crashk_size, &crashk_base);
894                          */
895 #endif
896                 } else if (strlen(arcs_cmdline) + strlen(arg) + 1 <
897                            sizeof(arcs_cmdline) - 1) {
898                         strcat(arcs_cmdline, " ");
899                         strcat(arcs_cmdline, arg);
900                 }
901         }
902
903         if (strstr(arcs_cmdline, "console=") == NULL) {
904 #ifdef CONFIG_CAVIUM_OCTEON_2ND_KERNEL
905                 strcat(arcs_cmdline, " console=ttyS0,115200");
906 #else
907                 if (octeon_uart == 1)
908                         strcat(arcs_cmdline, " console=ttyS1,115200");
909                 else
910                         strcat(arcs_cmdline, " console=ttyS0,115200");
911 #endif
912         }
913
914         mips_hpt_frequency = octeon_get_clock_rate();
915
916         octeon_init_cvmcount();
917
918         _machine_restart = octeon_restart;
919         _machine_halt = octeon_halt;
920
921 #ifdef CONFIG_KEXEC
922         _machine_kexec_shutdown = octeon_shutdown;
923         _machine_crash_shutdown = octeon_crash_shutdown;
924         _machine_kexec_prepare = octeon_kexec_prepare;
925 #ifdef CONFIG_SMP
926         _crash_smp_send_stop = octeon_crash_smp_send_stop;
927 #endif
928 #endif
929
930         octeon_user_io_init();
931         octeon_setup_smp();
932 }
933
934 /* Exclude a single page from the regions obtained in plat_mem_setup. */
935 #ifndef CONFIG_CRASH_DUMP
936 static __init void memory_exclude_page(u64 addr, u64 *mem, u64 *size)
937 {
938         if (addr > *mem && addr < *mem + *size) {
939                 u64 inc = addr - *mem;
940                 add_memory_region(*mem, inc, BOOT_MEM_RAM);
941                 *mem += inc;
942                 *size -= inc;
943         }
944
945         if (addr == *mem && *size > PAGE_SIZE) {
946                 *mem += PAGE_SIZE;
947                 *size -= PAGE_SIZE;
948         }
949 }
950 #endif /* CONFIG_CRASH_DUMP */
951
952 void __init plat_mem_setup(void)
953 {
954         uint64_t mem_alloc_size;
955         uint64_t total;
956         uint64_t crashk_end;
957 #ifndef CONFIG_CRASH_DUMP
958         int64_t memory;
959         uint64_t kernel_start;
960         uint64_t kernel_size;
961 #endif
962
963         total = 0;
964         crashk_end = 0;
965
966         /*
967          * The Mips memory init uses the first memory location for
968          * some memory vectors. When SPARSEMEM is in use, it doesn't
969          * verify that the size is big enough for the final
970          * vectors. Making the smallest chuck 4MB seems to be enough
971          * to consistently work.
972          */
973         mem_alloc_size = 4 << 20;
974         if (mem_alloc_size > MAX_MEMORY)
975                 mem_alloc_size = MAX_MEMORY;
976
977 /* Crashkernel ignores bootmem list. It relies on mem=X@Y option */
978 #ifdef CONFIG_CRASH_DUMP
979         add_memory_region(RESERVE_LOW_MEM, MAX_MEMORY, BOOT_MEM_RAM);
980         total += MAX_MEMORY;
981 #else
982 #ifdef CONFIG_KEXEC
983         if (crashk_size > 0) {
984                 add_memory_region(crashk_base, crashk_size, BOOT_MEM_RAM);
985                 crashk_end = crashk_base + crashk_size;
986         }
987 #endif
988         /*
989          * When allocating memory, we want incrementing addresses from
990          * bootmem_alloc so the code in add_memory_region can merge
991          * regions next to each other.
992          */
993         cvmx_bootmem_lock();
994         while ((boot_mem_map.nr_map < BOOT_MEM_MAP_MAX)
995                 && (total < MAX_MEMORY)) {
996                 memory = cvmx_bootmem_phy_alloc(mem_alloc_size,
997                                                 __pa_symbol(&_end), -1,
998                                                 0x100000,
999                                                 CVMX_BOOTMEM_FLAG_NO_LOCKING);
1000                 if (memory >= 0) {
1001                         u64 size = mem_alloc_size;
1002 #ifdef CONFIG_KEXEC
1003                         uint64_t end;
1004 #endif
1005
1006                         /*
1007                          * exclude a page at the beginning and end of
1008                          * the 256MB PCIe 'hole' so the kernel will not
1009                          * try to allocate multi-page buffers that
1010                          * span the discontinuity.
1011                          */
1012                         memory_exclude_page(CVMX_PCIE_BAR1_PHYS_BASE,
1013                                             &memory, &size);
1014                         memory_exclude_page(CVMX_PCIE_BAR1_PHYS_BASE +
1015                                             CVMX_PCIE_BAR1_PHYS_SIZE,
1016                                             &memory, &size);
1017 #ifdef CONFIG_KEXEC
1018                         end = memory + mem_alloc_size;
1019
1020                         /*
1021                          * This function automatically merges address regions
1022                          * next to each other if they are received in
1023                          * incrementing order
1024                          */
1025                         if (memory < crashk_base && end >  crashk_end) {
1026                                 /* region is fully in */
1027                                 add_memory_region(memory,
1028                                                   crashk_base - memory,
1029                                                   BOOT_MEM_RAM);
1030                                 total += crashk_base - memory;
1031                                 add_memory_region(crashk_end,
1032                                                   end - crashk_end,
1033                                                   BOOT_MEM_RAM);
1034                                 total += end - crashk_end;
1035                                 continue;
1036                         }
1037
1038                         if (memory >= crashk_base && end <= crashk_end)
1039                                 /*
1040                                  * Entire memory region is within the new
1041                                  *  kernel's memory, ignore it.
1042                                  */
1043                                 continue;
1044
1045                         if (memory > crashk_base && memory < crashk_end &&
1046                             end > crashk_end) {
1047                                 /*
1048                                  * Overlap with the beginning of the region,
1049                                  * reserve the beginning.
1050                                   */
1051                                 mem_alloc_size -= crashk_end - memory;
1052                                 memory = crashk_end;
1053                         } else if (memory < crashk_base && end > crashk_base &&
1054                                    end < crashk_end)
1055                                 /*
1056                                  * Overlap with the beginning of the region,
1057                                  * chop of end.
1058                                  */
1059                                 mem_alloc_size -= end - crashk_base;
1060 #endif
1061                         add_memory_region(memory, mem_alloc_size, BOOT_MEM_RAM);
1062                         total += mem_alloc_size;
1063                         /* Recovering mem_alloc_size */
1064                         mem_alloc_size = 4 << 20;
1065                 } else {
1066                         break;
1067                 }
1068         }
1069         cvmx_bootmem_unlock();
1070         /* Add the memory region for the kernel. */
1071         kernel_start = (unsigned long) _text;
1072         kernel_size = _end - _text;
1073
1074         /* Adjust for physical offset. */
1075         kernel_start &= ~0xffffffff80000000ULL;
1076         add_memory_region(kernel_start, kernel_size, BOOT_MEM_RAM);
1077 #endif /* CONFIG_CRASH_DUMP */
1078
1079 #ifdef CONFIG_CAVIUM_RESERVE32
1080         /*
1081          * Now that we've allocated the kernel memory it is safe to
1082          * free the reserved region. We free it here so that builtin
1083          * drivers can use the memory.
1084          */
1085         if (octeon_reserve32_memory)
1086                 cvmx_bootmem_free_named("CAVIUM_RESERVE32");
1087 #endif /* CONFIG_CAVIUM_RESERVE32 */
1088
1089         if (total == 0)
1090                 panic("Unable to allocate memory from "
1091                       "cvmx_bootmem_phy_alloc");
1092 }
1093
1094 /*
1095  * Emit one character to the boot UART.  Exported for use by the
1096  * watchdog timer.
1097  */
1098 int prom_putchar(char c)
1099 {
1100         uint64_t lsrval;
1101
1102         /* Spin until there is room */
1103         do {
1104                 lsrval = cvmx_read_csr(CVMX_MIO_UARTX_LSR(octeon_uart));
1105         } while ((lsrval & 0x20) == 0);
1106
1107         /* Write the byte */
1108         cvmx_write_csr(CVMX_MIO_UARTX_THR(octeon_uart), c & 0xffull);
1109         return 1;
1110 }
1111 EXPORT_SYMBOL(prom_putchar);
1112
1113 void __init prom_free_prom_memory(void)
1114 {
1115         if (CAVIUM_OCTEON_DCACHE_PREFETCH_WAR) {
1116                 /* Check for presence of Core-14449 fix.  */
1117                 u32 insn;
1118                 u32 *foo;
1119
1120                 foo = &insn;
1121
1122                 asm volatile("# before" : : : "memory");
1123                 prefetch(foo);
1124                 asm volatile(
1125                         ".set push\n\t"
1126                         ".set noreorder\n\t"
1127                         "bal 1f\n\t"
1128                         "nop\n"
1129                         "1:\tlw %0,-12($31)\n\t"
1130                         ".set pop\n\t"
1131                         : "=r" (insn) : : "$31", "memory");
1132
1133                 if ((insn >> 26) != 0x33)
1134                         panic("No PREF instruction at Core-14449 probe point.");
1135
1136                 if (((insn >> 16) & 0x1f) != 28)
1137                         panic("OCTEON II DCache prefetch workaround not in place (%04x).\n"
1138                               "Please build kernel with proper options (CONFIG_CAVIUM_CN63XXP1).",
1139                               insn);
1140         }
1141 }
1142
1143 void __init octeon_fill_mac_addresses(void);
1144 int octeon_prune_device_tree(void);
1145
1146 extern const char __appended_dtb;
1147 extern const char __dtb_octeon_3xxx_begin;
1148 extern const char __dtb_octeon_68xx_begin;
1149 void __init device_tree_init(void)
1150 {
1151         const void *fdt;
1152         bool do_prune;
1153         bool fill_mac;
1154
1155 #ifdef CONFIG_MIPS_ELF_APPENDED_DTB
1156         if (!fdt_check_header(&__appended_dtb)) {
1157                 fdt = &__appended_dtb;
1158                 do_prune = false;
1159                 fill_mac = true;
1160                 pr_info("Using appended Device Tree.\n");
1161         } else
1162 #endif
1163         if (octeon_bootinfo->minor_version >= 3 && octeon_bootinfo->fdt_addr) {
1164                 fdt = phys_to_virt(octeon_bootinfo->fdt_addr);
1165                 if (fdt_check_header(fdt))
1166                         panic("Corrupt Device Tree passed to kernel.");
1167                 do_prune = false;
1168                 fill_mac = false;
1169                 pr_info("Using passed Device Tree.\n");
1170         } else if (OCTEON_IS_MODEL(OCTEON_CN68XX)) {
1171                 fdt = &__dtb_octeon_68xx_begin;
1172                 do_prune = true;
1173                 fill_mac = true;
1174         } else {
1175                 fdt = &__dtb_octeon_3xxx_begin;
1176                 do_prune = true;
1177                 fill_mac = true;
1178         }
1179
1180         initial_boot_params = (void *)fdt;
1181
1182         if (do_prune) {
1183                 octeon_prune_device_tree();
1184                 pr_info("Using internal Device Tree.\n");
1185         }
1186         if (fill_mac)
1187                 octeon_fill_mac_addresses();
1188         unflatten_and_copy_device_tree();
1189         init_octeon_system_type();
1190 }
1191
1192 static int __initdata disable_octeon_edac_p;
1193
1194 static int __init disable_octeon_edac(char *str)
1195 {
1196         disable_octeon_edac_p = 1;
1197         return 0;
1198 }
1199 early_param("disable_octeon_edac", disable_octeon_edac);
1200
1201 static char *edac_device_names[] = {
1202         "octeon_l2c_edac",
1203         "octeon_pc_edac",
1204 };
1205
1206 static int __init edac_devinit(void)
1207 {
1208         struct platform_device *dev;
1209         int i, err = 0;
1210         int num_lmc;
1211         char *name;
1212
1213         if (disable_octeon_edac_p)
1214                 return 0;
1215
1216         for (i = 0; i < ARRAY_SIZE(edac_device_names); i++) {
1217                 name = edac_device_names[i];
1218                 dev = platform_device_register_simple(name, -1, NULL, 0);
1219                 if (IS_ERR(dev)) {
1220                         pr_err("Registration of %s failed!\n", name);
1221                         err = PTR_ERR(dev);
1222                 }
1223         }
1224
1225         num_lmc = OCTEON_IS_MODEL(OCTEON_CN68XX) ? 4 :
1226                 (OCTEON_IS_MODEL(OCTEON_CN56XX) ? 2 : 1);
1227         for (i = 0; i < num_lmc; i++) {
1228                 dev = platform_device_register_simple("octeon_lmc_edac",
1229                                                       i, NULL, 0);
1230                 if (IS_ERR(dev)) {
1231                         pr_err("Registration of octeon_lmc_edac %d failed!\n", i);
1232                         err = PTR_ERR(dev);
1233                 }
1234         }
1235
1236         return err;
1237 }
1238 device_initcall(edac_devinit);
1239
1240 static void __initdata *octeon_dummy_iospace;
1241
1242 static int __init octeon_no_pci_init(void)
1243 {
1244         /*
1245          * Initially assume there is no PCI. The PCI/PCIe platform code will
1246          * later re-initialize these to correct values if they are present.
1247          */
1248         octeon_dummy_iospace = vzalloc(IO_SPACE_LIMIT);
1249         set_io_port_base((unsigned long)octeon_dummy_iospace);
1250         ioport_resource.start = MAX_RESOURCE;
1251         ioport_resource.end = 0;
1252         return 0;
1253 }
1254 core_initcall(octeon_no_pci_init);
1255
1256 static int __init octeon_no_pci_release(void)
1257 {
1258         /*
1259          * Release the allocated memory if a real IO space is there.
1260          */
1261         if ((unsigned long)octeon_dummy_iospace != mips_io_port_base)
1262                 vfree(octeon_dummy_iospace);
1263         return 0;
1264 }
1265 late_initcall(octeon_no_pci_release);