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
6 * Copyright (C) 2004-2007 Cavium Networks
7 * Copyright (C) 2008, 2009 Wind River Systems
8 * written by Ralf Baechle <ralf@linux-mips.org>
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>
19 #include <linux/memblock.h>
20 #include <linux/serial.h>
21 #include <linux/smp.h>
22 #include <linux/types.h>
23 #include <linux/string.h> /* for memset */
24 #include <linux/tty.h>
25 #include <linux/time.h>
26 #include <linux/platform_device.h>
27 #include <linux/serial_core.h>
28 #include <linux/serial_8250.h>
29 #include <linux/of_fdt.h>
30 #include <linux/libfdt.h>
31 #include <linux/kexec.h>
33 #include <asm/processor.h>
34 #include <asm/reboot.h>
35 #include <asm/smp-ops.h>
36 #include <asm/irq_cpu.h>
37 #include <asm/mipsregs.h>
38 #include <asm/bootinfo.h>
39 #include <asm/sections.h>
40 #include <asm/fw/fw.h>
41 #include <asm/setup.h>
45 #include <asm/octeon/octeon.h>
46 #include <asm/octeon/pci-octeon.h>
47 #include <asm/octeon/cvmx-rst-defs.h>
50 * TRUE for devices having registers with little-endian byte
51 * order, FALSE for registers with native-endian byte order.
52 * PCI mandates little-endian, USB and SATA are configuraable,
53 * but we chose little-endian for these.
55 const bool octeon_should_swizzle_table[256] = {
56 [0x00] = true, /* bootbus/CF */
57 [0x1b] = true, /* PCI mmio window */
58 [0x1c] = true, /* PCI mmio window */
59 [0x1d] = true, /* PCI mmio window */
60 [0x1e] = true, /* PCI mmio window */
61 [0x68] = true, /* OCTEON III USB */
62 [0x69] = true, /* OCTEON III USB */
63 [0x6c] = true, /* OCTEON III SATA */
64 [0x6f] = true, /* OCTEON II USB */
66 EXPORT_SYMBOL(octeon_should_swizzle_table);
69 extern void pci_console_init(const char *arg);
72 static unsigned long long max_memory = ULLONG_MAX;
73 static unsigned long long reserve_low_mem;
75 DEFINE_SEMAPHORE(octeon_bootbus_sem);
76 EXPORT_SYMBOL(octeon_bootbus_sem);
78 static struct octeon_boot_descriptor *octeon_boot_desc_ptr;
80 struct cvmx_bootinfo *octeon_bootinfo;
81 EXPORT_SYMBOL(octeon_bootinfo);
86 * Wait for relocation code is prepared and send
87 * secondary CPUs to spin until kernel is relocated.
89 static void octeon_kexec_smp_down(void *ignored)
91 int cpu = smp_processor_id();
94 set_cpu_online(cpu, false);
95 while (!atomic_read(&kexec_ready_to_reboot))
106 #define OCTEON_DDR0_BASE (0x0ULL)
107 #define OCTEON_DDR0_SIZE (0x010000000ULL)
108 #define OCTEON_DDR1_BASE (0x410000000ULL)
109 #define OCTEON_DDR1_SIZE (0x010000000ULL)
110 #define OCTEON_DDR2_BASE (0x020000000ULL)
111 #define OCTEON_DDR2_SIZE (0x3e0000000ULL)
112 #define OCTEON_MAX_PHY_MEM_SIZE (16*1024*1024*1024ULL)
114 static struct kimage *kimage_ptr;
116 static void kexec_bootmem_init(uint64_t mem_size, uint32_t low_reserved_bytes)
119 struct cvmx_bootmem_desc *bootmem_desc;
121 bootmem_desc = cvmx_bootmem_get_desc();
123 if (mem_size > OCTEON_MAX_PHY_MEM_SIZE) {
124 mem_size = OCTEON_MAX_PHY_MEM_SIZE;
125 pr_err("Error: requested memory too large,"
126 "truncating to maximum size\n");
129 bootmem_desc->major_version = CVMX_BOOTMEM_DESC_MAJ_VER;
130 bootmem_desc->minor_version = CVMX_BOOTMEM_DESC_MIN_VER;
132 addr = (OCTEON_DDR0_BASE + reserve_low_mem + low_reserved_bytes);
133 bootmem_desc->head_addr = 0;
135 if (mem_size <= OCTEON_DDR0_SIZE) {
136 __cvmx_bootmem_phy_free(addr,
137 mem_size - reserve_low_mem -
138 low_reserved_bytes, 0);
142 __cvmx_bootmem_phy_free(addr,
143 OCTEON_DDR0_SIZE - reserve_low_mem -
144 low_reserved_bytes, 0);
146 mem_size -= OCTEON_DDR0_SIZE;
148 if (mem_size > OCTEON_DDR1_SIZE) {
149 __cvmx_bootmem_phy_free(OCTEON_DDR1_BASE, OCTEON_DDR1_SIZE, 0);
150 __cvmx_bootmem_phy_free(OCTEON_DDR2_BASE,
151 mem_size - OCTEON_DDR1_SIZE, 0);
153 __cvmx_bootmem_phy_free(OCTEON_DDR1_BASE, mem_size, 0);
156 static int octeon_kexec_prepare(struct kimage *image)
159 char *bootloader = "kexec";
161 octeon_boot_desc_ptr->argc = 0;
162 for (i = 0; i < image->nr_segments; i++) {
163 if (!strncmp(bootloader, (char *)image->segment[i].buf,
164 strlen(bootloader))) {
166 * convert command line string to array
167 * of parameters (as bootloader does).
170 char *str = (char *)image->segment[i].buf;
171 char *ptr = strchr(str, ' ');
172 while (ptr && (OCTEON_ARGV_MAX_ARGS > argc)) {
175 offt = (int)(ptr - str + 1);
176 octeon_boot_desc_ptr->argv[argc] =
177 image->segment[i].mem + offt;
180 ptr = strchr(ptr + 1, ' ');
182 octeon_boot_desc_ptr->argc = argc;
188 * Information about segments will be needed during pre-boot memory
195 static void octeon_generic_shutdown(void)
201 struct cvmx_bootmem_desc *bootmem_desc;
202 void *named_block_array_ptr;
204 bootmem_desc = cvmx_bootmem_get_desc();
205 named_block_array_ptr =
206 cvmx_phys_to_ptr(bootmem_desc->named_block_array_addr);
209 /* disable watchdogs */
210 for_each_online_cpu(cpu)
211 cvmx_write_csr(CVMX_CIU_WDOGX(cpu_logical_map(cpu)), 0);
213 cvmx_write_csr(CVMX_CIU_WDOGX(cvmx_get_core_num()), 0);
215 if (kimage_ptr != kexec_crash_image) {
216 memset(named_block_array_ptr,
218 CVMX_BOOTMEM_NUM_NAMED_BLOCKS *
219 sizeof(struct cvmx_bootmem_named_block_desc));
221 * Mark all memory (except low 0x100000 bytes) as free.
222 * It is the same thing that bootloader does.
224 kexec_bootmem_init(octeon_bootinfo->dram_size*1024ULL*1024ULL,
227 * Allocate all segments to avoid their corruption during boot.
229 for (i = 0; i < kimage_ptr->nr_segments; i++)
230 cvmx_bootmem_alloc_address(
231 kimage_ptr->segment[i].memsz + 2*PAGE_SIZE,
232 kimage_ptr->segment[i].mem - PAGE_SIZE,
236 * Do not mark all memory as free. Free only named sections
237 * leaving the rest of memory unchanged.
239 struct cvmx_bootmem_named_block_desc *ptr =
240 (struct cvmx_bootmem_named_block_desc *)
241 named_block_array_ptr;
243 for (i = 0; i < bootmem_desc->named_block_num_blocks; i++)
245 cvmx_bootmem_free_named(ptr[i].name);
247 kexec_args[2] = 1UL; /* running on octeon_main_processor */
248 kexec_args[3] = (unsigned long)octeon_boot_desc_ptr;
250 secondary_kexec_args[2] = 0UL; /* running on secondary cpu */
251 secondary_kexec_args[3] = (unsigned long)octeon_boot_desc_ptr;
255 static void octeon_shutdown(void)
257 octeon_generic_shutdown();
259 smp_call_function(octeon_kexec_smp_down, NULL, 0);
261 while (num_online_cpus() > 1) {
268 static void octeon_crash_shutdown(struct pt_regs *regs)
270 octeon_generic_shutdown();
271 default_machine_crash_shutdown(regs);
275 void octeon_crash_smp_send_stop(void)
279 /* disable watchdogs */
280 for_each_online_cpu(cpu)
281 cvmx_write_csr(CVMX_CIU_WDOGX(cpu_logical_map(cpu)), 0);
285 #endif /* CONFIG_KEXEC */
288 /* crashkernel cmdline parameter is parsed _after_ memory setup
289 * we also parse it here (workaround for EHB5200) */
290 static uint64_t crashk_size, crashk_base;
293 static int octeon_uart;
295 extern asmlinkage void handle_int(void);
298 * octeon_is_simulation - Return non-zero if we are currently running
299 * in the Octeon simulator
301 * Return: non-0 if running in the Octeon simulator, 0 otherwise
303 int octeon_is_simulation(void)
305 return octeon_bootinfo->board_type == CVMX_BOARD_TYPE_SIM;
307 EXPORT_SYMBOL(octeon_is_simulation);
310 * octeon_is_pci_host - Return true if Octeon is in PCI Host mode. This means
311 * Linux can control the PCI bus.
313 * Return: Non-zero if Octeon is in host mode.
315 int octeon_is_pci_host(void)
318 return octeon_bootinfo->config_flags & CVMX_BOOTINFO_CFG_FLAG_PCI_HOST;
325 * octeon_get_clock_rate - Get the clock rate of Octeon
327 * Return: Clock rate in HZ
329 uint64_t octeon_get_clock_rate(void)
331 struct cvmx_sysinfo *sysinfo = cvmx_sysinfo_get();
333 return sysinfo->cpu_clock_hz;
335 EXPORT_SYMBOL(octeon_get_clock_rate);
337 static u64 octeon_io_clock_rate;
339 u64 octeon_get_io_clock_rate(void)
341 return octeon_io_clock_rate;
343 EXPORT_SYMBOL(octeon_get_io_clock_rate);
347 * octeon_write_lcd - Write to the LCD display connected to the bootbus.
348 * @s: String to write
350 * This display exists on most Cavium evaluation boards. If it doesn't exist,
351 * then this function doesn't do anything.
353 static void octeon_write_lcd(const char *s)
355 if (octeon_bootinfo->led_display_base_addr) {
356 void __iomem *lcd_address =
357 ioremap(octeon_bootinfo->led_display_base_addr,
360 for (i = 0; i < 8; i++, s++) {
362 iowrite8(*s, lcd_address + i);
364 iowrite8(' ', lcd_address + i);
366 iounmap(lcd_address);
371 * octeon_get_boot_uart - Return the console uart passed by the bootloader
373 * Return: uart number (0 or 1)
375 static int octeon_get_boot_uart(void)
377 return (octeon_boot_desc_ptr->flags & OCTEON_BL_FLAG_CONSOLE_UART1) ?
382 * octeon_get_boot_coremask - Get the coremask Linux was booted on.
386 int octeon_get_boot_coremask(void)
388 return octeon_boot_desc_ptr->core_mask;
392 * octeon_check_cpu_bist - Check the hardware BIST results for a CPU
394 void octeon_check_cpu_bist(void)
396 const int coreid = cvmx_get_core_num();
397 unsigned long long mask;
398 unsigned long long bist_val;
400 /* Check BIST results for COP0 registers */
401 mask = 0x1f00000000ull;
402 bist_val = read_octeon_c0_icacheerr();
404 pr_err("Core%d BIST Failure: CacheErr(icache) = 0x%llx\n",
407 bist_val = read_octeon_c0_dcacheerr();
409 pr_err("Core%d L1 Dcache parity error: "
410 "CacheErr(dcache) = 0x%llx\n",
413 mask = 0xfc00000000000000ull;
414 bist_val = read_c0_cvmmemctl();
416 pr_err("Core%d BIST Failure: COP0_CVM_MEM_CTL = 0x%llx\n",
419 write_octeon_c0_dcacheerr(0);
423 * octeon_restart - Reboot Octeon
425 * @command: Command to pass to the bootloader. Currently ignored.
427 static void octeon_restart(char *command)
429 /* Disable all watchdogs before soft reset. They don't get cleared */
432 for_each_online_cpu(cpu)
433 cvmx_write_csr(CVMX_CIU_WDOGX(cpu_logical_map(cpu)), 0);
435 cvmx_write_csr(CVMX_CIU_WDOGX(cvmx_get_core_num()), 0);
440 if (OCTEON_IS_OCTEON3())
441 cvmx_write_csr(CVMX_RST_SOFT_RST, 1);
443 cvmx_write_csr(CVMX_CIU_SOFT_RST, 1);
448 * octeon_kill_core - Permanently stop a core.
452 static void octeon_kill_core(void *arg)
454 if (octeon_is_simulation())
455 /* A break instruction causes the simulator stop a core */
456 asm volatile ("break" ::: "memory");
459 /* Disable watchdog on this core. */
460 cvmx_write_csr(CVMX_CIU_WDOGX(cvmx_get_core_num()), 0);
461 /* Spin in a low power mode. */
463 asm volatile ("wait" ::: "memory");
468 * octeon_halt - Halt the system
470 static void octeon_halt(void)
472 smp_call_function(octeon_kill_core, NULL, 0);
474 switch (octeon_bootinfo->board_type) {
475 case CVMX_BOARD_TYPE_NAO38:
476 /* Driving a 1 to GPIO 12 shuts off this board */
477 cvmx_write_csr(CVMX_GPIO_BIT_CFGX(12), 1);
478 cvmx_write_csr(CVMX_GPIO_TX_SET, 0x1000);
481 octeon_write_lcd("PowerOff");
485 octeon_kill_core(NULL);
488 static char __read_mostly octeon_system_type[80];
490 static void __init init_octeon_system_type(void)
492 char const *board_type;
494 board_type = cvmx_board_type_to_string(octeon_bootinfo->board_type);
495 if (board_type == NULL) {
496 struct device_node *root;
499 root = of_find_node_by_path("/");
500 ret = of_property_read_string(root, "model", &board_type);
503 board_type = "Unsupported Board";
506 snprintf(octeon_system_type, sizeof(octeon_system_type), "%s (%s)",
507 board_type, octeon_model_get_string(read_c0_prid()));
511 * octeon_board_type_string - Return a string representing the system type
513 * Return: system type string
515 const char *octeon_board_type_string(void)
517 return octeon_system_type;
520 const char *get_system_type(void)
521 __attribute__ ((alias("octeon_board_type_string")));
523 void octeon_user_io_init(void)
525 union octeon_cvmemctl cvmmemctl;
527 /* Get the current settings for CP0_CVMMEMCTL_REG */
528 cvmmemctl.u64 = read_c0_cvmmemctl();
529 /* R/W If set, marked write-buffer entries time out the same
530 * as as other entries; if clear, marked write-buffer entries
531 * use the maximum timeout. */
532 cvmmemctl.s.dismarkwblongto = 1;
533 /* R/W If set, a merged store does not clear the write-buffer
534 * entry timeout state. */
535 cvmmemctl.s.dismrgclrwbto = 0;
536 /* R/W Two bits that are the MSBs of the resultant CVMSEG LM
537 * word location for an IOBDMA. The other 8 bits come from the
538 * SCRADDR field of the IOBDMA. */
539 cvmmemctl.s.iobdmascrmsb = 0;
540 /* R/W If set, SYNCWS and SYNCS only order marked stores; if
541 * clear, SYNCWS and SYNCS only order unmarked
542 * stores. SYNCWSMARKED has no effect when DISSYNCWS is
544 cvmmemctl.s.syncwsmarked = 0;
545 /* R/W If set, SYNCWS acts as SYNCW and SYNCS acts as SYNC. */
546 cvmmemctl.s.dissyncws = 0;
547 /* R/W If set, no stall happens on write buffer full. */
548 if (OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2))
549 cvmmemctl.s.diswbfst = 1;
551 cvmmemctl.s.diswbfst = 0;
552 /* R/W If set (and SX set), supervisor-level loads/stores can
553 * use XKPHYS addresses with <48>==0 */
554 cvmmemctl.s.xkmemenas = 0;
556 /* R/W If set (and UX set), user-level loads/stores can use
557 * XKPHYS addresses with VA<48>==0 */
558 cvmmemctl.s.xkmemenau = 0;
560 /* R/W If set (and SX set), supervisor-level loads/stores can
561 * use XKPHYS addresses with VA<48>==1 */
562 cvmmemctl.s.xkioenas = 0;
564 /* R/W If set (and UX set), user-level loads/stores can use
565 * XKPHYS addresses with VA<48>==1 */
566 cvmmemctl.s.xkioenau = 0;
568 /* R/W If set, all stores act as SYNCW (NOMERGE must be set
569 * when this is set) RW, reset to 0. */
570 cvmmemctl.s.allsyncw = 0;
572 /* R/W If set, no stores merge, and all stores reach the
573 * coherent bus in order. */
574 cvmmemctl.s.nomerge = 0;
575 /* R/W Selects the bit in the counter used for DID time-outs 0
576 * = 231, 1 = 230, 2 = 229, 3 = 214. Actual time-out is
577 * between 1x and 2x this interval. For example, with
578 * DIDTTO=3, expiration interval is between 16K and 32K. */
579 cvmmemctl.s.didtto = 0;
580 /* R/W If set, the (mem) CSR clock never turns off. */
581 cvmmemctl.s.csrckalwys = 0;
582 /* R/W If set, mclk never turns off. */
583 cvmmemctl.s.mclkalwys = 0;
584 /* R/W Selects the bit in the counter used for write buffer
585 * flush time-outs (WBFLT+11) is the bit position in an
586 * internal counter used to determine expiration. The write
587 * buffer expires between 1x and 2x this interval. For
588 * example, with WBFLT = 0, a write buffer expires between 2K
589 * and 4K cycles after the write buffer entry is allocated. */
590 cvmmemctl.s.wbfltime = 0;
591 /* R/W If set, do not put Istream in the L2 cache. */
592 cvmmemctl.s.istrnol2 = 0;
595 * R/W The write buffer threshold. As per erratum Core-14752
596 * for CN63XX, a sc/scd might fail if the write buffer is
597 * full. Lowering WBTHRESH greatly lowers the chances of the
598 * write buffer ever being full and triggering the erratum.
600 if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_X))
601 cvmmemctl.s.wbthresh = 4;
603 cvmmemctl.s.wbthresh = 10;
605 /* R/W If set, CVMSEG is available for loads/stores in
606 * kernel/debug mode. */
607 #if CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0
608 cvmmemctl.s.cvmsegenak = 1;
610 cvmmemctl.s.cvmsegenak = 0;
612 /* R/W If set, CVMSEG is available for loads/stores in
613 * supervisor mode. */
614 cvmmemctl.s.cvmsegenas = 0;
615 /* R/W If set, CVMSEG is available for loads/stores in user
617 cvmmemctl.s.cvmsegenau = 0;
619 write_c0_cvmmemctl(cvmmemctl.u64);
621 /* Setup of CVMSEG is done in kernel-entry-init.h */
622 if (smp_processor_id() == 0)
623 pr_notice("CVMSEG size: %d cache lines (%d bytes)\n",
624 CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE,
625 CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE * 128);
627 if (octeon_has_feature(OCTEON_FEATURE_FAU)) {
628 union cvmx_iob_fau_timeout fau_timeout;
630 /* Set a default for the hardware timeouts */
632 fau_timeout.s.tout_val = 0xfff;
633 /* Disable tagwait FAU timeout */
634 fau_timeout.s.tout_enb = 0;
635 cvmx_write_csr(CVMX_IOB_FAU_TIMEOUT, fau_timeout.u64);
638 if ((!OCTEON_IS_MODEL(OCTEON_CN68XX) &&
639 !OCTEON_IS_MODEL(OCTEON_CN7XXX)) ||
640 OCTEON_IS_MODEL(OCTEON_CN70XX)) {
641 union cvmx_pow_nw_tim nm_tim;
646 cvmx_write_csr(CVMX_POW_NW_TIM, nm_tim.u64);
649 write_octeon_c0_icacheerr(0);
650 write_c0_derraddr1(0);
654 * prom_init - Early entry point for arch setup
656 void __init prom_init(void)
658 struct cvmx_sysinfo *sysinfo;
666 * The bootloader passes a pointer to the boot descriptor in
667 * $a3, this is available as fw_arg3.
669 octeon_boot_desc_ptr = (struct octeon_boot_descriptor *)fw_arg3;
671 cvmx_phys_to_ptr(octeon_boot_desc_ptr->cvmx_desc_vaddr);
672 cvmx_bootmem_init(cvmx_phys_to_ptr(octeon_bootinfo->phy_mem_desc_addr));
674 sysinfo = cvmx_sysinfo_get();
675 memset(sysinfo, 0, sizeof(*sysinfo));
676 sysinfo->system_dram_size = octeon_bootinfo->dram_size << 20;
677 sysinfo->phy_mem_desc_addr = (u64)phys_to_virt(octeon_bootinfo->phy_mem_desc_addr);
679 if ((octeon_bootinfo->major_version > 1) ||
680 (octeon_bootinfo->major_version == 1 &&
681 octeon_bootinfo->minor_version >= 4))
682 cvmx_coremask_copy(&sysinfo->core_mask,
683 &octeon_bootinfo->ext_core_mask);
685 cvmx_coremask_set64(&sysinfo->core_mask,
686 octeon_bootinfo->core_mask);
688 /* Some broken u-boot pass garbage in upper bits, clear them out */
689 if (!OCTEON_IS_MODEL(OCTEON_CN78XX))
690 for (i = 512; i < 1024; i++)
691 cvmx_coremask_clear_core(&sysinfo->core_mask, i);
693 sysinfo->exception_base_addr = octeon_bootinfo->exception_base_addr;
694 sysinfo->cpu_clock_hz = octeon_bootinfo->eclock_hz;
695 sysinfo->dram_data_rate_hz = octeon_bootinfo->dclock_hz * 2;
696 sysinfo->board_type = octeon_bootinfo->board_type;
697 sysinfo->board_rev_major = octeon_bootinfo->board_rev_major;
698 sysinfo->board_rev_minor = octeon_bootinfo->board_rev_minor;
699 memcpy(sysinfo->mac_addr_base, octeon_bootinfo->mac_addr_base,
700 sizeof(sysinfo->mac_addr_base));
701 sysinfo->mac_addr_count = octeon_bootinfo->mac_addr_count;
702 memcpy(sysinfo->board_serial_number,
703 octeon_bootinfo->board_serial_number,
704 sizeof(sysinfo->board_serial_number));
705 sysinfo->compact_flash_common_base_addr =
706 octeon_bootinfo->compact_flash_common_base_addr;
707 sysinfo->compact_flash_attribute_base_addr =
708 octeon_bootinfo->compact_flash_attribute_base_addr;
709 sysinfo->led_display_base_addr = octeon_bootinfo->led_display_base_addr;
710 sysinfo->dfa_ref_clock_hz = octeon_bootinfo->dfa_ref_clock_hz;
711 sysinfo->bootloader_config_flags = octeon_bootinfo->config_flags;
713 if (OCTEON_IS_OCTEON2()) {
714 /* I/O clock runs at a different rate than the CPU. */
715 union cvmx_mio_rst_boot rst_boot;
716 rst_boot.u64 = cvmx_read_csr(CVMX_MIO_RST_BOOT);
717 octeon_io_clock_rate = 50000000 * rst_boot.s.pnr_mul;
718 } else if (OCTEON_IS_OCTEON3()) {
719 /* I/O clock runs at a different rate than the CPU. */
720 union cvmx_rst_boot rst_boot;
721 rst_boot.u64 = cvmx_read_csr(CVMX_RST_BOOT);
722 octeon_io_clock_rate = 50000000 * rst_boot.s.pnr_mul;
724 octeon_io_clock_rate = sysinfo->cpu_clock_hz;
727 t = read_c0_cvmctl();
728 if ((t & (1ull << 27)) == 0) {
730 * Setup the multiplier save/restore code if
731 * CvmCtl[NOMUL] clear.
739 int save_max = (char *)octeon_mult_save_end -
740 (char *)octeon_mult_save;
741 int restore_max = (char *)octeon_mult_restore_end -
742 (char *)octeon_mult_restore;
743 if (current_cpu_data.cputype == CPU_CAVIUM_OCTEON3) {
744 save = octeon_mult_save3;
745 save_end = octeon_mult_save3_end;
746 restore = octeon_mult_restore3;
747 restore_end = octeon_mult_restore3_end;
749 save = octeon_mult_save2;
750 save_end = octeon_mult_save2_end;
751 restore = octeon_mult_restore2;
752 restore_end = octeon_mult_restore2_end;
754 save_len = (char *)save_end - (char *)save;
755 restore_len = (char *)restore_end - (char *)restore;
756 if (!WARN_ON(save_len > save_max ||
757 restore_len > restore_max)) {
758 memcpy(octeon_mult_save, save, save_len);
759 memcpy(octeon_mult_restore, restore, restore_len);
764 * Only enable the LED controller if we're running on a CN38XX, CN58XX,
765 * or CN56XX. The CN30XX and CN31XX don't have an LED controller.
767 if (!octeon_is_simulation() &&
768 octeon_has_feature(OCTEON_FEATURE_LED_CONTROLLER)) {
769 cvmx_write_csr(CVMX_LED_EN, 0);
770 cvmx_write_csr(CVMX_LED_PRT, 0);
771 cvmx_write_csr(CVMX_LED_DBG, 0);
772 cvmx_write_csr(CVMX_LED_PRT_FMT, 0);
773 cvmx_write_csr(CVMX_LED_UDD_CNTX(0), 32);
774 cvmx_write_csr(CVMX_LED_UDD_CNTX(1), 32);
775 cvmx_write_csr(CVMX_LED_UDD_DATX(0), 0);
776 cvmx_write_csr(CVMX_LED_UDD_DATX(1), 0);
777 cvmx_write_csr(CVMX_LED_EN, 1);
780 #ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2
781 if (cvmx_read_csr(CVMX_L2D_FUS3) & (3ull << 34)) {
782 pr_info("Skipping L2 locking due to reduced L2 cache size\n");
784 uint32_t __maybe_unused ebase = read_c0_ebase() & 0x3ffff000;
785 #ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_TLB
787 cvmx_l2c_lock_mem_region(ebase, 0x100);
789 #ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_EXCEPTION
790 /* General exception */
791 cvmx_l2c_lock_mem_region(ebase + 0x180, 0x80);
793 #ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_LOW_LEVEL_INTERRUPT
794 /* Interrupt handler */
795 cvmx_l2c_lock_mem_region(ebase + 0x200, 0x80);
797 #ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_INTERRUPT
798 cvmx_l2c_lock_mem_region(__pa_symbol(handle_int), 0x100);
799 cvmx_l2c_lock_mem_region(__pa_symbol(plat_irq_dispatch), 0x80);
801 #ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_MEMCPY
802 cvmx_l2c_lock_mem_region(__pa_symbol(memcpy), 0x480);
807 octeon_check_cpu_bist();
809 octeon_uart = octeon_get_boot_uart();
812 octeon_write_lcd("LinuxSMP");
814 octeon_write_lcd("Linux");
817 octeon_setup_delays();
820 * BIST should always be enabled when doing a soft reset. L2
821 * Cache locking for instance is not cleared unless BIST is
822 * enabled. Unfortunately due to a chip errata G-200 for
823 * Cn38XX and CN31XX, BIST must be disabled on these parts.
825 if (OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2) ||
826 OCTEON_IS_MODEL(OCTEON_CN31XX))
827 cvmx_write_csr(CVMX_CIU_SOFT_BIST, 0);
829 cvmx_write_csr(CVMX_CIU_SOFT_BIST, 1);
831 /* Default to 64MB in the simulator to speed things up */
832 if (octeon_is_simulation())
833 max_memory = 64ull << 20;
835 arg = strstr(arcs_cmdline, "mem=");
837 max_memory = memparse(arg + 4, &p);
839 max_memory = 32ull << 30;
841 reserve_low_mem = memparse(p + 1, &p);
845 argc = octeon_boot_desc_ptr->argc;
846 for (i = 0; i < argc; i++) {
848 cvmx_phys_to_ptr(octeon_boot_desc_ptr->argv[i]);
849 if ((strncmp(arg, "MEM=", 4) == 0) ||
850 (strncmp(arg, "mem=", 4) == 0)) {
851 max_memory = memparse(arg + 4, &p);
853 max_memory = 32ull << 30;
855 reserve_low_mem = memparse(p + 1, &p);
857 } else if (strncmp(arg, "crashkernel=", 12) == 0) {
858 crashk_size = memparse(arg+12, &p);
860 crashk_base = memparse(p+1, &p);
861 strcat(arcs_cmdline, " ");
862 strcat(arcs_cmdline, arg);
864 * To do: switch parsing to new style, something like:
865 * parse_crashkernel(arg, sysinfo->system_dram_size,
866 * &crashk_size, &crashk_base);
869 } else if (strlen(arcs_cmdline) + strlen(arg) + 1 <
870 sizeof(arcs_cmdline) - 1) {
871 strcat(arcs_cmdline, " ");
872 strcat(arcs_cmdline, arg);
876 if (strstr(arcs_cmdline, "console=") == NULL) {
877 if (octeon_uart == 1)
878 strcat(arcs_cmdline, " console=ttyS1,115200");
880 strcat(arcs_cmdline, " console=ttyS0,115200");
883 mips_hpt_frequency = octeon_get_clock_rate();
885 octeon_init_cvmcount();
887 _machine_restart = octeon_restart;
888 _machine_halt = octeon_halt;
891 _machine_kexec_shutdown = octeon_shutdown;
892 _machine_crash_shutdown = octeon_crash_shutdown;
893 _machine_kexec_prepare = octeon_kexec_prepare;
895 _crash_smp_send_stop = octeon_crash_smp_send_stop;
899 octeon_user_io_init();
903 /* Exclude a single page from the regions obtained in plat_mem_setup. */
904 #ifndef CONFIG_CRASH_DUMP
905 static __init void memory_exclude_page(u64 addr, u64 *mem, u64 *size)
907 if (addr > *mem && addr < *mem + *size) {
908 u64 inc = addr - *mem;
909 memblock_add(*mem, inc);
914 if (addr == *mem && *size > PAGE_SIZE) {
919 #endif /* CONFIG_CRASH_DUMP */
921 void __init fw_init_cmdline(void)
925 octeon_boot_desc_ptr = (struct octeon_boot_descriptor *)fw_arg3;
926 for (i = 0; i < octeon_boot_desc_ptr->argc; i++) {
928 cvmx_phys_to_ptr(octeon_boot_desc_ptr->argv[i]);
929 if (strlen(arcs_cmdline) + strlen(arg) + 1 <
930 sizeof(arcs_cmdline) - 1) {
931 strcat(arcs_cmdline, " ");
932 strcat(arcs_cmdline, arg);
937 void __init *plat_get_fdt(void)
940 cvmx_phys_to_ptr(octeon_boot_desc_ptr->cvmx_desc_vaddr);
941 return phys_to_virt(octeon_bootinfo->fdt_addr);
944 void __init plat_mem_setup(void)
946 uint64_t mem_alloc_size;
949 #ifndef CONFIG_CRASH_DUMP
957 * The Mips memory init uses the first memory location for
958 * some memory vectors. When SPARSEMEM is in use, it doesn't
959 * verify that the size is big enough for the final
960 * vectors. Making the smallest chuck 4MB seems to be enough
961 * to consistently work.
963 mem_alloc_size = 4 << 20;
964 if (mem_alloc_size > max_memory)
965 mem_alloc_size = max_memory;
967 /* Crashkernel ignores bootmem list. It relies on mem=X@Y option */
968 #ifdef CONFIG_CRASH_DUMP
969 memblock_add(reserve_low_mem, max_memory);
973 if (crashk_size > 0) {
974 memblock_add(crashk_base, crashk_size);
975 crashk_end = crashk_base + crashk_size;
979 * When allocating memory, we want incrementing addresses,
980 * which is handled by memblock
983 while (total < max_memory) {
984 memory = cvmx_bootmem_phy_alloc(mem_alloc_size,
985 __pa_symbol(&_end), -1,
987 CVMX_BOOTMEM_FLAG_NO_LOCKING);
989 u64 size = mem_alloc_size;
995 * exclude a page at the beginning and end of
996 * the 256MB PCIe 'hole' so the kernel will not
997 * try to allocate multi-page buffers that
998 * span the discontinuity.
1000 memory_exclude_page(CVMX_PCIE_BAR1_PHYS_BASE,
1002 memory_exclude_page(CVMX_PCIE_BAR1_PHYS_BASE +
1003 CVMX_PCIE_BAR1_PHYS_SIZE,
1006 end = memory + mem_alloc_size;
1009 * This function automatically merges address regions
1010 * next to each other if they are received in
1011 * incrementing order
1013 if (memory < crashk_base && end > crashk_end) {
1014 /* region is fully in */
1015 memblock_add(memory, crashk_base - memory);
1016 total += crashk_base - memory;
1017 memblock_add(crashk_end, end - crashk_end);
1018 total += end - crashk_end;
1022 if (memory >= crashk_base && end <= crashk_end)
1024 * Entire memory region is within the new
1025 * kernel's memory, ignore it.
1029 if (memory > crashk_base && memory < crashk_end &&
1032 * Overlap with the beginning of the region,
1033 * reserve the beginning.
1035 mem_alloc_size -= crashk_end - memory;
1036 memory = crashk_end;
1037 } else if (memory < crashk_base && end > crashk_base &&
1040 * Overlap with the beginning of the region,
1043 mem_alloc_size -= end - crashk_base;
1045 memblock_add(memory, mem_alloc_size);
1046 total += mem_alloc_size;
1047 /* Recovering mem_alloc_size */
1048 mem_alloc_size = 4 << 20;
1053 cvmx_bootmem_unlock();
1054 #endif /* CONFIG_CRASH_DUMP */
1057 panic("Unable to allocate memory from "
1058 "cvmx_bootmem_phy_alloc");
1062 * Emit one character to the boot UART. Exported for use by the
1065 void prom_putchar(char c)
1069 /* Spin until there is room */
1071 lsrval = cvmx_read_csr(CVMX_MIO_UARTX_LSR(octeon_uart));
1072 } while ((lsrval & 0x20) == 0);
1074 /* Write the byte */
1075 cvmx_write_csr(CVMX_MIO_UARTX_THR(octeon_uart), c & 0xffull);
1077 EXPORT_SYMBOL(prom_putchar);
1079 void __init prom_free_prom_memory(void)
1081 if (OCTEON_IS_MODEL(OCTEON_CN6XXX)) {
1082 /* Check for presence of Core-14449 fix. */
1088 asm volatile("# before" : : : "memory");
1092 ".set noreorder\n\t"
1095 "1:\tlw %0,-12($31)\n\t"
1097 : "=r" (insn) : : "$31", "memory");
1099 if ((insn >> 26) != 0x33)
1100 panic("No PREF instruction at Core-14449 probe point.");
1102 if (((insn >> 16) & 0x1f) != 28)
1103 panic("OCTEON II DCache prefetch workaround not in place (%04x).\n"
1104 "Please build kernel with proper options (CONFIG_CAVIUM_CN63XXP1).",
1109 void __init octeon_fill_mac_addresses(void);
1111 void __init device_tree_init(void)
1117 #ifdef CONFIG_MIPS_ELF_APPENDED_DTB
1118 if (!fdt_check_header(&__appended_dtb)) {
1119 fdt = &__appended_dtb;
1122 pr_info("Using appended Device Tree.\n");
1125 if (octeon_bootinfo->minor_version >= 3 && octeon_bootinfo->fdt_addr) {
1126 fdt = phys_to_virt(octeon_bootinfo->fdt_addr);
1127 if (fdt_check_header(fdt))
1128 panic("Corrupt Device Tree passed to kernel.");
1131 pr_info("Using passed Device Tree.\n");
1132 } else if (OCTEON_IS_MODEL(OCTEON_CN68XX)) {
1133 fdt = &__dtb_octeon_68xx_begin;
1137 fdt = &__dtb_octeon_3xxx_begin;
1142 initial_boot_params = (void *)fdt;
1145 octeon_prune_device_tree();
1146 pr_info("Using internal Device Tree.\n");
1149 octeon_fill_mac_addresses();
1150 unflatten_and_copy_device_tree();
1151 init_octeon_system_type();
1154 static int __initdata disable_octeon_edac_p;
1156 static int __init disable_octeon_edac(char *str)
1158 disable_octeon_edac_p = 1;
1161 early_param("disable_octeon_edac", disable_octeon_edac);
1163 static char *edac_device_names[] = {
1168 static int __init edac_devinit(void)
1170 struct platform_device *dev;
1175 if (disable_octeon_edac_p)
1178 for (i = 0; i < ARRAY_SIZE(edac_device_names); i++) {
1179 name = edac_device_names[i];
1180 dev = platform_device_register_simple(name, -1, NULL, 0);
1182 pr_err("Registration of %s failed!\n", name);
1187 num_lmc = OCTEON_IS_MODEL(OCTEON_CN68XX) ? 4 :
1188 (OCTEON_IS_MODEL(OCTEON_CN56XX) ? 2 : 1);
1189 for (i = 0; i < num_lmc; i++) {
1190 dev = platform_device_register_simple("octeon_lmc_edac",
1193 pr_err("Registration of octeon_lmc_edac %d failed!\n", i);
1200 device_initcall(edac_devinit);
1202 static void __initdata *octeon_dummy_iospace;
1204 static int __init octeon_no_pci_init(void)
1207 * Initially assume there is no PCI. The PCI/PCIe platform code will
1208 * later re-initialize these to correct values if they are present.
1210 octeon_dummy_iospace = vzalloc(IO_SPACE_LIMIT);
1211 set_io_port_base((unsigned long)octeon_dummy_iospace);
1212 ioport_resource.start = MAX_RESOURCE;
1213 ioport_resource.end = 0;
1216 core_initcall(octeon_no_pci_init);
1218 static int __init octeon_no_pci_release(void)
1221 * Release the allocated memory if a real IO space is there.
1223 if ((unsigned long)octeon_dummy_iospace != mips_io_port_base)
1224 vfree(octeon_dummy_iospace);
1227 late_initcall(octeon_no_pci_release);