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>
39 #include <asm/sn/arch.h>
40 #include <asm/sn/addrs.h>
41 #include <asm/sn/pda.h>
42 #include <asm/sn/nodepda.h>
43 #include <asm/sn/sn_cpuid.h>
44 #include <asm/sn/simulator.h>
45 #include <asm/sn/leds.h>
46 #include <asm/sn/bte.h>
47 #include <asm/sn/shub_mmr.h>
48 #include <asm/sn/clksupport.h>
49 #include <asm/sn/sn_sal.h>
50 #include <asm/sn/geo.h>
51 #include "xtalk/xwidgetdev.h"
52 #include "xtalk/hubdev.h"
53 #include <asm/sn/klconfig.h>
56 DEFINE_PER_CPU(struct pda_s, pda_percpu);
58 #define MAX_PHYS_MEMORY (1UL << 49) /* 1 TB */
60 lboard_t *root_lboard[MAX_COMPACT_NODES];
62 extern void bte_init_node(nodepda_t *, cnodeid_t);
64 extern void sn_timer_init(void);
65 extern unsigned long last_time_offset;
66 extern void (*ia64_mark_idle) (int);
67 extern void snidle(int);
68 extern unsigned char acpi_kbd_controller_present;
70 unsigned long sn_rtc_cycles_per_second;
71 EXPORT_SYMBOL(sn_rtc_cycles_per_second);
73 DEFINE_PER_CPU(struct sn_hub_info_s, __sn_hub_info);
74 EXPORT_PER_CPU_SYMBOL(__sn_hub_info);
76 DEFINE_PER_CPU(short, __sn_cnodeid_to_nasid[MAX_NUMNODES]);
77 EXPORT_PER_CPU_SYMBOL(__sn_cnodeid_to_nasid);
79 DEFINE_PER_CPU(struct nodepda_s *, __sn_nodepda);
80 EXPORT_PER_CPU_SYMBOL(__sn_nodepda);
82 partid_t sn_partid = -1;
83 EXPORT_SYMBOL(sn_partid);
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);
99 short physical_node_map[MAX_PHYSNODE_ID];
101 EXPORT_SYMBOL(physical_node_map);
105 static void sn_init_pdas(char **);
106 static void scan_for_ionodes(void);
108 static nodepda_t *nodepdaindr[MAX_COMPACT_NODES];
111 * The format of "screen_info" is strange, and due to early i386-setup
112 * code. This is just enough to make the console code think we're on a
115 struct screen_info sn_screen_info = {
118 .orig_video_mode = 3,
119 .orig_video_cols = 80,
120 .orig_video_ega_bx = 3,
121 .orig_video_lines = 25,
122 .orig_video_isVGA = 1,
123 .orig_video_points = 16
127 * This is here so we can use the CMOS detection in ide-probe.c to
128 * determine what drives are present. In theory, we don't need this
129 * as the auto-detection could be done via ide-probe.c:do_probe() but
130 * in practice that would be much slower, which is painful when
131 * running in the simulator. Note that passing zeroes in DRIVE_INFO
132 * is sufficient (the IDE driver will autodetect the drive geometry).
134 #ifdef CONFIG_IA64_GENERIC
135 extern char drive_info[4 * 16];
137 char drive_info[4 * 16];
141 * Get nasid of current cpu early in boot before nodepda is initialized
148 if (ia64_sn_get_sapic_info(get_sapicid(), &nasid, NULL, NULL))
154 * This routine can only be used during init, since
155 * smp_boot_data is an init data structure.
156 * We have to use smp_boot_data.cpu_phys_id to find
157 * the physical id of the processor because the normal
158 * cpu_physical_id() relies on data structures that
159 * may not be initialized yet.
162 static int __init pxm_to_nasid(int pxm)
167 nid = pxm_to_nid_map[pxm];
168 for (i = 0; i < num_node_memblks; i++) {
169 if (node_memblk[i].nid == nid) {
170 return NASID_GET(node_memblk[i].start_paddr);
177 * early_sn_setup - early setup routine for SN platforms
179 * Sets up an initial console to aid debugging. Intended primarily
180 * for bringup. See start_kernel() in init/main.c.
183 void __init early_sn_setup(void)
185 efi_system_table_t *efi_systab;
186 efi_config_table_t *config_tables;
187 struct ia64_sal_systab *sal_systab;
188 struct ia64_sal_desc_entry_point *ep;
193 * Parse enough of the SAL tables to locate the SAL entry point. Since, console
194 * IO on SN2 is done via SAL calls, early_printk won't work without this.
196 * This code duplicates some of the ACPI table parsing that is in efi.c & sal.c.
197 * Any changes to those file may have to be made hereas well.
199 efi_systab = (efi_system_table_t *) __va(ia64_boot_param->efi_systab);
200 config_tables = __va(efi_systab->tables);
201 for (i = 0; i < efi_systab->nr_tables; i++) {
202 if (efi_guidcmp(config_tables[i].guid, SAL_SYSTEM_TABLE_GUID) ==
204 sal_systab = __va(config_tables[i].table);
205 p = (char *)(sal_systab + 1);
206 for (j = 0; j < sal_systab->entry_count; j++) {
207 if (*p == SAL_DESC_ENTRY_POINT) {
208 ep = (struct ia64_sal_desc_entry_point
210 ia64_sal_handler_init(__va
215 p += SAL_DESC_SIZE(*p);
219 /* Uh-oh, SAL not available?? */
220 printk(KERN_ERR "failed to find SAL entry point\n");
223 extern int platform_intr_list[];
224 extern nasid_t master_nasid;
225 static int shub_1_1_found __initdata;
230 * Set flag for enabling shub specific wars
233 static inline int __init is_shub_1_1(int nasid)
240 id = REMOTE_HUB_L(nasid, SH1_SHUB_ID);
241 rev = (id & SH1_SHUB_ID_REVISION_MASK) >> SH1_SHUB_ID_REVISION_SHFT;
245 static void __init sn_check_for_wars(void)
252 for_each_online_node(cnode) {
253 if (is_shub_1_1(cnodeid_to_nasid(cnode)))
254 sn_hub_info->shub_1_1_found = 1;
260 * sn_setup - SN platform setup routine
261 * @cmdline_p: kernel command line
263 * Handles platform setup for SN machines. This includes determining
264 * the RTC frequency (via a SAL call), initializing secondary CPUs, and
265 * setting up per-node data areas. The console is also initialized here.
267 void __init sn_setup(char **cmdline_p)
269 long status, ticks_per_sec, drift;
271 int major = sn_sal_rev_major(), minor = sn_sal_rev_minor();
272 extern void sn_cpu_init(void);
274 ia64_sn_plat_set_error_handling_features();
277 * If the generic code has enabled vga console support - lets
278 * get rid of it again. This is a kludge for the fact that ACPI
279 * currtently has no way of informing us if legacy VGA is available
282 #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
283 if (conswitchp == &vga_con) {
284 printk(KERN_DEBUG "SGI: Disabling VGA console\n");
285 #ifdef CONFIG_DUMMY_CONSOLE
286 conswitchp = &dummy_con;
289 #endif /* CONFIG_DUMMY_CONSOLE */
291 #endif /* def(CONFIG_VT) && def(CONFIG_VGA_CONSOLE) */
293 MAX_DMA_ADDRESS = PAGE_OFFSET + MAX_PHYS_MEMORY;
295 memset(physical_node_map, -1, sizeof(physical_node_map));
296 for (pxm = 0; pxm < MAX_PXM_DOMAINS; pxm++)
297 if (pxm_to_nid_map[pxm] != -1)
298 physical_node_map[pxm_to_nasid(pxm)] =
302 * Old PROMs do not provide an ACPI FADT. Disable legacy keyboard
303 * support here so we don't have to listen to failed keyboard probe
306 if ((major < 2 || (major == 2 && minor <= 9)) &&
307 acpi_kbd_controller_present) {
308 printk(KERN_INFO "Disabling legacy keyboard support as prom "
309 "is too old and doesn't provide FADT\n");
310 acpi_kbd_controller_present = 0;
313 printk("SGI SAL version %x.%02x\n", major, minor);
316 * Confirm the SAL we're running on is recent enough...
318 if ((major < SN_SAL_MIN_MAJOR) || (major == SN_SAL_MIN_MAJOR &&
319 minor < SN_SAL_MIN_MINOR)) {
320 printk(KERN_ERR "This kernel needs SGI SAL version >= "
321 "%x.%02x\n", SN_SAL_MIN_MAJOR, SN_SAL_MIN_MINOR);
322 panic("PROM version too old\n");
325 master_nasid = boot_get_nasid();
328 ia64_sal_freq_base(SAL_FREQ_BASE_REALTIME_CLOCK, &ticks_per_sec,
330 if (status != 0 || ticks_per_sec < 100000) {
332 "unable to determine platform RTC clock frequency, guessing.\n");
333 /* PROM gives wrong value for clock freq. so guess */
334 sn_rtc_cycles_per_second = 1000000000000UL / 30000UL;
336 sn_rtc_cycles_per_second = ticks_per_sec;
338 platform_intr_list[ACPI_INTERRUPT_CPEI] = IA64_CPE_VECTOR;
341 * we set the default root device to /dev/hda
342 * to make simulation easy
344 ROOT_DEV = Root_HDA1;
347 * Create the PDAs and NODEPDAs for all the cpus.
349 sn_init_pdas(cmdline_p);
351 ia64_mark_idle = &snidle;
354 * For the bootcpu, we do this here. All other cpus will make the
355 * call as part of cpu_init in slave cpu initialization.
362 screen_info = sn_screen_info;
367 * set pm_power_off to a SAL call to allow
368 * sn machines to power off. The SAL call can be replaced
369 * by an ACPI interface call when ACPI is fully implemented
372 pm_power_off = ia64_sn_power_down;
376 * sn_init_pdas - setup node data areas
378 * One time setup for Node Data Area. Called by sn_setup().
380 static void __init sn_init_pdas(char **cmdline_p)
384 memset(sn_cnodeid_to_nasid, -1,
385 sizeof(__ia64_per_cpu_var(__sn_cnodeid_to_nasid)));
386 for_each_online_node(cnode)
387 sn_cnodeid_to_nasid[cnode] =
388 pxm_to_nasid(nid_to_pxm_map[cnode]);
390 numionodes = num_online_nodes();
394 * Allocate & initalize the nodepda for each node.
396 for_each_online_node(cnode) {
398 alloc_bootmem_node(NODE_DATA(cnode), sizeof(nodepda_t));
399 memset(nodepdaindr[cnode], 0, sizeof(nodepda_t));
400 memset(nodepdaindr[cnode]->phys_cpuid, -1,
401 sizeof(nodepdaindr[cnode]->phys_cpuid));
405 * Allocate & initialize nodepda for TIOs. For now, put them on node 0.
407 for (cnode = num_online_nodes(); cnode < numionodes; cnode++) {
409 alloc_bootmem_node(NODE_DATA(0), sizeof(nodepda_t));
410 memset(nodepdaindr[cnode], 0, sizeof(nodepda_t));
414 * Now copy the array of nodepda pointers to each nodepda.
416 for (cnode = 0; cnode < numionodes; cnode++)
417 memcpy(nodepdaindr[cnode]->pernode_pdaindr, nodepdaindr,
418 sizeof(nodepdaindr));
421 * Set up IO related platform-dependent nodepda fields.
422 * The following routine actually sets up the hubinfo struct
425 for_each_online_node(cnode) {
426 bte_init_node(nodepdaindr[cnode], cnode);
430 * Initialize the per node hubdev. This includes IO Nodes and
431 * headless/memless nodes.
433 for (cnode = 0; cnode < numionodes; cnode++) {
434 hubdev_init_node(nodepdaindr[cnode], cnode);
439 * sn_cpu_init - initialize per-cpu data areas
440 * @cpuid: cpuid of the caller
442 * Called during cpu initialization on each cpu as it starts.
443 * Currently, initializes the per-cpu data area for SNIA.
444 * Also sets up a few fields in the nodepda. Also known as
445 * platform_cpu_init() by the ia64 machvec code.
447 void __init sn_cpu_init(void)
456 static int wars_have_been_checked;
458 memset(pda, 0, sizeof(pda));
459 if (ia64_sn_get_sn_info(0, &sn_hub_info->shub2, &sn_hub_info->nasid_bitmask, &sn_hub_info->nasid_shift,
460 &sn_system_size, &sn_sharing_domain_size, &sn_partition_id,
461 &sn_coherency_id, &sn_region_size))
463 sn_hub_info->as_shift = sn_hub_info->nasid_shift - 2;
466 * The boot cpu makes this call again after platform initialization is
469 if (nodepdaindr[0] == NULL)
472 cpuid = smp_processor_id();
473 cpuphyid = get_sapicid();
475 if (ia64_sn_get_sapic_info(cpuphyid, &nasid, &subnode, &slice))
478 for (i=0; i < MAX_NUMNODES; i++) {
479 if (nodepdaindr[i]) {
480 nodepdaindr[i]->phys_cpuid[cpuid].nasid = nasid;
481 nodepdaindr[i]->phys_cpuid[cpuid].slice = slice;
482 nodepdaindr[i]->phys_cpuid[cpuid].subnode = subnode;
486 cnode = nasid_to_cnodeid(nasid);
488 sn_nodepda = nodepdaindr[cnode];
491 (typeof(pda->led_address)) (LED0 + (slice << LED_CPU_SHIFT));
492 pda->led_state = LED_ALWAYS_SET;
493 pda->hb_count = HZ / 2;
498 /* copy cpu 0's sn_cnodeid_to_nasid table to this cpu's */
499 memcpy(sn_cnodeid_to_nasid,
500 (&per_cpu(__sn_cnodeid_to_nasid, 0)),
501 sizeof(__ia64_per_cpu_var(__sn_cnodeid_to_nasid)));
506 * Only needs to be done once, on BSP.
507 * Has to be done after loop above, because it uses this cpu's
508 * sn_cnodeid_to_nasid table which was just initialized if this
510 * Has to be done before assignment below.
512 if (!wars_have_been_checked) {
514 wars_have_been_checked = 1;
516 sn_hub_info->shub_1_1_found = shub_1_1_found;
519 * Set up addresses of PIO/MEM write status registers.
522 u64 pio1[] = {SH1_PIO_WRITE_STATUS_0, 0, SH1_PIO_WRITE_STATUS_1, 0};
523 u64 pio2[] = {SH2_PIO_WRITE_STATUS_0, SH2_PIO_WRITE_STATUS_1,
524 SH2_PIO_WRITE_STATUS_2, SH2_PIO_WRITE_STATUS_3};
526 pio = is_shub1() ? pio1 : pio2;
527 pda->pio_write_status_addr = (volatile unsigned long *) LOCAL_MMR_ADDR(pio[slice]);
528 pda->pio_write_status_val = is_shub1() ? SH_PIO_WRITE_STATUS_PENDING_WRITE_COUNT_MASK : 0;
532 * WAR addresses for SHUB 1.x.
534 if (local_node_data->active_cpu_count++ == 0 && is_shub1()) {
537 cnodeid_to_nasid(numa_node_id() ==
538 num_online_nodes() - 1 ? 0 : numa_node_id() + 1);
539 pda->pio_shub_war_cam_addr =
540 (volatile unsigned long *)GLOBAL_MMR_ADDR(nasid,
546 * Scan klconfig for ionodes. Add the nasids to the
547 * physical_node_map and the pda and increment numionodes.
550 static void __init scan_for_ionodes(void)
555 /* Setup ionodes with memory */
556 for (nasid = 0; nasid < MAX_PHYSNODE_ID; nasid += 2) {
557 char *klgraph_header;
560 if (physical_node_map[nasid] == -1)
564 klgraph_header = __va(ia64_sn_get_klconfig_addr(nasid));
565 if (!klgraph_header) {
566 if (IS_RUNNING_ON_SIMULATOR())
568 BUG(); /* All nodes must have klconfig tables! */
570 cnodeid = nasid_to_cnodeid(nasid);
571 root_lboard[cnodeid] = (lboard_t *)
572 NODE_OFFSET_TO_LBOARD((nasid),
574 *) (klgraph_header))->
578 /* Scan headless/memless IO Nodes. */
579 for (nasid = 0; nasid < MAX_PHYSNODE_ID; nasid += 2) {
580 /* if there's no nasid, don't try to read the klconfig on the node */
581 if (physical_node_map[nasid] == -1)
583 brd = find_lboard_any((lboard_t *)
584 root_lboard[nasid_to_cnodeid(nasid)],
587 brd = KLCF_NEXT_ANY(brd); /* Skip this node's lboard */
592 brd = find_lboard_any(brd, KLTYPE_SNIA);
595 sn_cnodeid_to_nasid[numionodes] = brd->brd_nasid;
596 physical_node_map[brd->brd_nasid] = numionodes;
597 root_lboard[numionodes] = brd;
599 brd = KLCF_NEXT_ANY(brd);
603 brd = find_lboard_any(brd, KLTYPE_SNIA);
607 /* Scan for TIO nodes. */
608 for (nasid = 0; nasid < MAX_PHYSNODE_ID; nasid += 2) {
609 /* if there's no nasid, don't try to read the klconfig on the node */
610 if (physical_node_map[nasid] == -1)
612 brd = find_lboard_any((lboard_t *)
613 root_lboard[nasid_to_cnodeid(nasid)],
616 sn_cnodeid_to_nasid[numionodes] = brd->brd_nasid;
617 physical_node_map[brd->brd_nasid] = numionodes;
618 root_lboard[numionodes] = brd;
620 brd = KLCF_NEXT_ANY(brd);
624 brd = find_lboard_any(brd, KLTYPE_TIO);
630 nasid_slice_to_cpuid(int nasid, int slice)
634 for (cpu=0; cpu < NR_CPUS; cpu++)
635 if (cpuid_to_nasid(cpu) == nasid &&
636 cpuid_to_slice(cpu) == slice)