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) 1999,2001-2005 Silicon Graphics, Inc. All rights reserved.
9 #include <linux/config.h>
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/delay.h>
13 #include <linux/kernel.h>
14 #include <linux/kdev_t.h>
15 #include <linux/string.h>
16 #include <linux/tty.h>
17 #include <linux/console.h>
18 #include <linux/timex.h>
19 #include <linux/sched.h>
20 #include <linux/ioport.h>
22 #include <linux/serial.h>
23 #include <linux/irq.h>
24 #include <linux/bootmem.h>
25 #include <linux/mmzone.h>
26 #include <linux/interrupt.h>
27 #include <linux/acpi.h>
28 #include <linux/compiler.h>
29 #include <linux/sched.h>
30 #include <linux/root_dev.h>
31 #include <linux/nodemask.h>
36 #include <asm/machvec.h>
37 #include <asm/system.h>
38 #include <asm/processor.h>
40 #include <asm/sn/arch.h>
41 #include <asm/sn/addrs.h>
42 #include <asm/sn/pda.h>
43 #include <asm/sn/nodepda.h>
44 #include <asm/sn/sn_cpuid.h>
45 #include <asm/sn/simulator.h>
46 #include <asm/sn/leds.h>
47 #include <asm/sn/bte.h>
48 #include <asm/sn/shub_mmr.h>
49 #include <asm/sn/clksupport.h>
50 #include <asm/sn/sn_sal.h>
51 #include <asm/sn/geo.h>
52 #include <asm/sn/sn_feature_sets.h>
53 #include "xtalk/xwidgetdev.h"
54 #include "xtalk/hubdev.h"
55 #include <asm/sn/klconfig.h>
58 DEFINE_PER_CPU(struct pda_s, pda_percpu);
60 #define MAX_PHYS_MEMORY (1UL << IA64_MAX_PHYS_BITS) /* Max physical address supported */
62 lboard_t *root_lboard[MAX_COMPACT_NODES];
64 extern void bte_init_node(nodepda_t *, cnodeid_t);
66 extern void sn_timer_init(void);
67 extern unsigned long last_time_offset;
68 extern void (*ia64_mark_idle) (int);
69 extern void snidle(int);
70 extern unsigned char acpi_kbd_controller_present;
72 unsigned long sn_rtc_cycles_per_second;
73 EXPORT_SYMBOL(sn_rtc_cycles_per_second);
75 DEFINE_PER_CPU(struct sn_hub_info_s, __sn_hub_info);
76 EXPORT_PER_CPU_SYMBOL(__sn_hub_info);
78 DEFINE_PER_CPU(short, __sn_cnodeid_to_nasid[MAX_NUMNODES]);
79 EXPORT_PER_CPU_SYMBOL(__sn_cnodeid_to_nasid);
81 DEFINE_PER_CPU(struct nodepda_s *, __sn_nodepda);
82 EXPORT_PER_CPU_SYMBOL(__sn_nodepda);
84 char sn_system_serial_number_string[128];
85 EXPORT_SYMBOL(sn_system_serial_number_string);
86 u64 sn_partition_serial_number;
87 EXPORT_SYMBOL(sn_partition_serial_number);
89 EXPORT_SYMBOL(sn_partition_id);
91 EXPORT_SYMBOL(sn_system_size);
92 u8 sn_sharing_domain_size;
93 EXPORT_SYMBOL(sn_sharing_domain_size);
95 EXPORT_SYMBOL(sn_coherency_id);
97 EXPORT_SYMBOL(sn_region_size);
98 int sn_prom_type; /* 0=hardware, 1=medusa/realprom, 2=medusa/fakeprom */
100 short physical_node_map[MAX_PHYSNODE_ID];
101 static unsigned long sn_prom_features[MAX_PROM_FEATURE_SETS];
103 EXPORT_SYMBOL(physical_node_map);
107 static void sn_init_pdas(char **);
108 static void scan_for_ionodes(void);
110 static nodepda_t *nodepdaindr[MAX_COMPACT_NODES];
113 * The format of "screen_info" is strange, and due to early i386-setup
114 * code. This is just enough to make the console code think we're on a
117 struct screen_info sn_screen_info = {
120 .orig_video_mode = 3,
121 .orig_video_cols = 80,
122 .orig_video_ega_bx = 3,
123 .orig_video_lines = 25,
124 .orig_video_isVGA = 1,
125 .orig_video_points = 16
129 * This is here so we can use the CMOS detection in ide-probe.c to
130 * determine what drives are present. In theory, we don't need this
131 * as the auto-detection could be done via ide-probe.c:do_probe() but
132 * in practice that would be much slower, which is painful when
133 * running in the simulator. Note that passing zeroes in DRIVE_INFO
134 * is sufficient (the IDE driver will autodetect the drive geometry).
136 #ifdef CONFIG_IA64_GENERIC
137 extern char drive_info[4 * 16];
139 char drive_info[4 * 16];
143 * Get nasid of current cpu early in boot before nodepda is initialized
150 if (ia64_sn_get_sapic_info(get_sapicid(), &nasid, NULL, NULL))
156 * This routine can only be used during init, since
157 * smp_boot_data is an init data structure.
158 * We have to use smp_boot_data.cpu_phys_id to find
159 * the physical id of the processor because the normal
160 * cpu_physical_id() relies on data structures that
161 * may not be initialized yet.
164 static int __init pxm_to_nasid(int pxm)
169 nid = pxm_to_nid_map[pxm];
170 for (i = 0; i < num_node_memblks; i++) {
171 if (node_memblk[i].nid == nid) {
172 return NASID_GET(node_memblk[i].start_paddr);
179 * early_sn_setup - early setup routine for SN platforms
181 * Sets up an initial console to aid debugging. Intended primarily
182 * for bringup. See start_kernel() in init/main.c.
185 void __init early_sn_setup(void)
187 efi_system_table_t *efi_systab;
188 efi_config_table_t *config_tables;
189 struct ia64_sal_systab *sal_systab;
190 struct ia64_sal_desc_entry_point *ep;
195 * Parse enough of the SAL tables to locate the SAL entry point. Since, console
196 * IO on SN2 is done via SAL calls, early_printk won't work without this.
198 * This code duplicates some of the ACPI table parsing that is in efi.c & sal.c.
199 * Any changes to those file may have to be made hereas well.
201 efi_systab = (efi_system_table_t *) __va(ia64_boot_param->efi_systab);
202 config_tables = __va(efi_systab->tables);
203 for (i = 0; i < efi_systab->nr_tables; i++) {
204 if (efi_guidcmp(config_tables[i].guid, SAL_SYSTEM_TABLE_GUID) ==
206 sal_systab = __va(config_tables[i].table);
207 p = (char *)(sal_systab + 1);
208 for (j = 0; j < sal_systab->entry_count; j++) {
209 if (*p == SAL_DESC_ENTRY_POINT) {
210 ep = (struct ia64_sal_desc_entry_point
212 ia64_sal_handler_init(__va
217 p += SAL_DESC_SIZE(*p);
221 /* Uh-oh, SAL not available?? */
222 printk(KERN_ERR "failed to find SAL entry point\n");
225 extern int platform_intr_list[];
226 extern nasid_t master_nasid;
227 static int __initdata shub_1_1_found = 0;
232 * Set flag for enabling shub specific wars
235 static inline int __init is_shub_1_1(int nasid)
242 id = REMOTE_HUB_L(nasid, SH1_SHUB_ID);
243 rev = (id & SH1_SHUB_ID_REVISION_MASK) >> SH1_SHUB_ID_REVISION_SHFT;
247 static void __init sn_check_for_wars(void)
254 for_each_online_node(cnode) {
255 if (is_shub_1_1(cnodeid_to_nasid(cnode)))
262 * sn_setup - SN platform setup routine
263 * @cmdline_p: kernel command line
265 * Handles platform setup for SN machines. This includes determining
266 * the RTC frequency (via a SAL call), initializing secondary CPUs, and
267 * setting up per-node data areas. The console is also initialized here.
269 void __init sn_setup(char **cmdline_p)
271 long status, ticks_per_sec, drift;
273 u32 version = sn_sal_rev();
274 extern void sn_cpu_init(void);
276 ia64_sn_plat_set_error_handling_features(); // obsolete
277 ia64_sn_set_os_feature(OSF_MCA_SLV_TO_OS_INIT_SLV);
278 ia64_sn_set_os_feature(OSF_FEAT_LOG_SBES);
281 #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
283 * If there was a primary vga adapter identified through the
284 * EFI PCDP table, make it the preferred console. Otherwise
285 * zero out conswitchp.
288 if (vga_console_membase) {
289 /* usable vga ... make tty0 the preferred default console */
290 add_preferred_console("tty", 0, NULL);
292 printk(KERN_DEBUG "SGI: Disabling VGA console\n");
293 #ifdef CONFIG_DUMMY_CONSOLE
294 conswitchp = &dummy_con;
297 #endif /* CONFIG_DUMMY_CONSOLE */
299 #endif /* def(CONFIG_VT) && def(CONFIG_VGA_CONSOLE) */
301 MAX_DMA_ADDRESS = PAGE_OFFSET + MAX_PHYS_MEMORY;
303 memset(physical_node_map, -1, sizeof(physical_node_map));
304 for (pxm = 0; pxm < MAX_PXM_DOMAINS; pxm++)
305 if (pxm_to_nid_map[pxm] != -1)
306 physical_node_map[pxm_to_nasid(pxm)] =
310 * Old PROMs do not provide an ACPI FADT. Disable legacy keyboard
311 * support here so we don't have to listen to failed keyboard probe
314 if (version <= 0x0209 && acpi_kbd_controller_present) {
315 printk(KERN_INFO "Disabling legacy keyboard support as prom "
316 "is too old and doesn't provide FADT\n");
317 acpi_kbd_controller_present = 0;
320 printk("SGI SAL version %x.%02x\n", version >> 8, version & 0x00FF);
322 master_nasid = boot_get_nasid();
325 ia64_sal_freq_base(SAL_FREQ_BASE_REALTIME_CLOCK, &ticks_per_sec,
327 if (status != 0 || ticks_per_sec < 100000) {
329 "unable to determine platform RTC clock frequency, guessing.\n");
330 /* PROM gives wrong value for clock freq. so guess */
331 sn_rtc_cycles_per_second = 1000000000000UL / 30000UL;
333 sn_rtc_cycles_per_second = ticks_per_sec;
335 platform_intr_list[ACPI_INTERRUPT_CPEI] = IA64_CPE_VECTOR;
338 * we set the default root device to /dev/hda
339 * to make simulation easy
341 ROOT_DEV = Root_HDA1;
344 * Create the PDAs and NODEPDAs for all the cpus.
346 sn_init_pdas(cmdline_p);
348 ia64_mark_idle = &snidle;
351 * For the bootcpu, we do this here. All other cpus will make the
352 * call as part of cpu_init in slave cpu initialization.
359 screen_info = sn_screen_info;
364 * set pm_power_off to a SAL call to allow
365 * sn machines to power off. The SAL call can be replaced
366 * by an ACPI interface call when ACPI is fully implemented
369 pm_power_off = ia64_sn_power_down;
373 * sn_init_pdas - setup node data areas
375 * One time setup for Node Data Area. Called by sn_setup().
377 static void __init sn_init_pdas(char **cmdline_p)
381 memset(sn_cnodeid_to_nasid, -1,
382 sizeof(__ia64_per_cpu_var(__sn_cnodeid_to_nasid)));
383 for_each_online_node(cnode)
384 sn_cnodeid_to_nasid[cnode] =
385 pxm_to_nasid(nid_to_pxm_map[cnode]);
387 numionodes = num_online_nodes();
391 * Allocate & initalize the nodepda for each node.
393 for_each_online_node(cnode) {
395 alloc_bootmem_node(NODE_DATA(cnode), sizeof(nodepda_t));
396 memset(nodepdaindr[cnode], 0, sizeof(nodepda_t));
397 memset(nodepdaindr[cnode]->phys_cpuid, -1,
398 sizeof(nodepdaindr[cnode]->phys_cpuid));
399 spin_lock_init(&nodepdaindr[cnode]->ptc_lock);
403 * Allocate & initialize nodepda for TIOs. For now, put them on node 0.
405 for (cnode = num_online_nodes(); cnode < numionodes; cnode++) {
407 alloc_bootmem_node(NODE_DATA(0), sizeof(nodepda_t));
408 memset(nodepdaindr[cnode], 0, sizeof(nodepda_t));
412 * Now copy the array of nodepda pointers to each nodepda.
414 for (cnode = 0; cnode < numionodes; cnode++)
415 memcpy(nodepdaindr[cnode]->pernode_pdaindr, nodepdaindr,
416 sizeof(nodepdaindr));
419 * Set up IO related platform-dependent nodepda fields.
420 * The following routine actually sets up the hubinfo struct
423 for_each_online_node(cnode) {
424 bte_init_node(nodepdaindr[cnode], cnode);
428 * Initialize the per node hubdev. This includes IO Nodes and
429 * headless/memless nodes.
431 for (cnode = 0; cnode < numionodes; cnode++) {
432 hubdev_init_node(nodepdaindr[cnode], cnode);
437 * sn_cpu_init - initialize per-cpu data areas
438 * @cpuid: cpuid of the caller
440 * Called during cpu initialization on each cpu as it starts.
441 * Currently, initializes the per-cpu data area for SNIA.
442 * Also sets up a few fields in the nodepda. Also known as
443 * platform_cpu_init() by the ia64 machvec code.
445 void __init sn_cpu_init(void)
454 static int wars_have_been_checked;
456 if (smp_processor_id() == 0 && IS_MEDUSA()) {
457 if (ia64_sn_is_fake_prom())
461 printk("Running on medusa with %s PROM\n", (sn_prom_type == 1) ? "real" : "fake");
464 memset(pda, 0, sizeof(pda));
465 if (ia64_sn_get_sn_info(0, &sn_hub_info->shub2, &sn_hub_info->nasid_bitmask, &sn_hub_info->nasid_shift,
466 &sn_system_size, &sn_sharing_domain_size, &sn_partition_id,
467 &sn_coherency_id, &sn_region_size))
469 sn_hub_info->as_shift = sn_hub_info->nasid_shift - 2;
472 * The boot cpu makes this call again after platform initialization is
475 if (nodepdaindr[0] == NULL)
478 for (i = 0; i < MAX_PROM_FEATURE_SETS; i++)
479 if (ia64_sn_get_prom_feature_set(i, &sn_prom_features[i]) != 0)
482 cpuid = smp_processor_id();
483 cpuphyid = get_sapicid();
485 if (ia64_sn_get_sapic_info(cpuphyid, &nasid, &subnode, &slice))
488 for (i=0; i < MAX_NUMNODES; i++) {
489 if (nodepdaindr[i]) {
490 nodepdaindr[i]->phys_cpuid[cpuid].nasid = nasid;
491 nodepdaindr[i]->phys_cpuid[cpuid].slice = slice;
492 nodepdaindr[i]->phys_cpuid[cpuid].subnode = subnode;
496 cnode = nasid_to_cnodeid(nasid);
498 sn_nodepda = nodepdaindr[cnode];
501 (typeof(pda->led_address)) (LED0 + (slice << LED_CPU_SHIFT));
502 pda->led_state = LED_ALWAYS_SET;
503 pda->hb_count = HZ / 2;
508 /* copy cpu 0's sn_cnodeid_to_nasid table to this cpu's */
509 memcpy(sn_cnodeid_to_nasid,
510 (&per_cpu(__sn_cnodeid_to_nasid, 0)),
511 sizeof(__ia64_per_cpu_var(__sn_cnodeid_to_nasid)));
516 * Only needs to be done once, on BSP.
517 * Has to be done after loop above, because it uses this cpu's
518 * sn_cnodeid_to_nasid table which was just initialized if this
520 * Has to be done before assignment below.
522 if (!wars_have_been_checked) {
524 wars_have_been_checked = 1;
526 sn_hub_info->shub_1_1_found = shub_1_1_found;
529 * Set up addresses of PIO/MEM write status registers.
532 u64 pio1[] = {SH1_PIO_WRITE_STATUS_0, 0, SH1_PIO_WRITE_STATUS_1, 0};
533 u64 pio2[] = {SH2_PIO_WRITE_STATUS_0, SH2_PIO_WRITE_STATUS_2,
534 SH2_PIO_WRITE_STATUS_1, SH2_PIO_WRITE_STATUS_3};
536 pio = is_shub1() ? pio1 : pio2;
537 pda->pio_write_status_addr = (volatile unsigned long *) LOCAL_MMR_ADDR(pio[slice]);
538 pda->pio_write_status_val = is_shub1() ? SH_PIO_WRITE_STATUS_PENDING_WRITE_COUNT_MASK : 0;
542 * WAR addresses for SHUB 1.x.
544 if (local_node_data->active_cpu_count++ == 0 && is_shub1()) {
547 cnodeid_to_nasid(numa_node_id() ==
548 num_online_nodes() - 1 ? 0 : numa_node_id() + 1);
549 pda->pio_shub_war_cam_addr =
550 (volatile unsigned long *)GLOBAL_MMR_ADDR(nasid,
556 * Scan klconfig for ionodes. Add the nasids to the
557 * physical_node_map and the pda and increment numionodes.
560 static void __init scan_for_ionodes(void)
565 /* fakeprom does not support klgraph */
566 if (IS_RUNNING_ON_FAKE_PROM())
569 /* Setup ionodes with memory */
570 for (nasid = 0; nasid < MAX_PHYSNODE_ID; nasid += 2) {
571 char *klgraph_header;
574 if (physical_node_map[nasid] == -1)
578 klgraph_header = __va(ia64_sn_get_klconfig_addr(nasid));
579 if (!klgraph_header) {
580 BUG(); /* All nodes must have klconfig tables! */
582 cnodeid = nasid_to_cnodeid(nasid);
583 root_lboard[cnodeid] = (lboard_t *)
584 NODE_OFFSET_TO_LBOARD((nasid),
586 *) (klgraph_header))->
590 /* Scan headless/memless IO Nodes. */
591 for (nasid = 0; nasid < MAX_PHYSNODE_ID; nasid += 2) {
592 /* if there's no nasid, don't try to read the klconfig on the node */
593 if (physical_node_map[nasid] == -1)
595 brd = find_lboard_any((lboard_t *)
596 root_lboard[nasid_to_cnodeid(nasid)],
599 brd = KLCF_NEXT_ANY(brd); /* Skip this node's lboard */
604 brd = find_lboard_any(brd, KLTYPE_SNIA);
607 sn_cnodeid_to_nasid[numionodes] = brd->brd_nasid;
608 physical_node_map[brd->brd_nasid] = numionodes;
609 root_lboard[numionodes] = brd;
611 brd = KLCF_NEXT_ANY(brd);
615 brd = find_lboard_any(brd, KLTYPE_SNIA);
619 /* Scan for TIO nodes. */
620 for (nasid = 0; nasid < MAX_PHYSNODE_ID; nasid += 2) {
621 /* if there's no nasid, don't try to read the klconfig on the node */
622 if (physical_node_map[nasid] == -1)
624 brd = find_lboard_any((lboard_t *)
625 root_lboard[nasid_to_cnodeid(nasid)],
628 sn_cnodeid_to_nasid[numionodes] = brd->brd_nasid;
629 physical_node_map[brd->brd_nasid] = numionodes;
630 root_lboard[numionodes] = brd;
632 brd = KLCF_NEXT_ANY(brd);
636 brd = find_lboard_any(brd, KLTYPE_TIO);
642 nasid_slice_to_cpuid(int nasid, int slice)
646 for (cpu=0; cpu < NR_CPUS; cpu++)
647 if (cpuid_to_nasid(cpu) == nasid &&
648 cpuid_to_slice(cpu) == slice)
654 int sn_prom_feature_available(int id)
656 if (id >= BITS_PER_LONG * MAX_PROM_FEATURE_SETS)
658 return test_bit(id, sn_prom_features);
660 EXPORT_SYMBOL(sn_prom_feature_available);