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 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 char sn_system_serial_number_string[128];
83 EXPORT_SYMBOL(sn_system_serial_number_string);
84 u64 sn_partition_serial_number;
85 EXPORT_SYMBOL(sn_partition_serial_number);
87 EXPORT_SYMBOL(sn_partition_id);
89 EXPORT_SYMBOL(sn_system_size);
90 u8 sn_sharing_domain_size;
91 EXPORT_SYMBOL(sn_sharing_domain_size);
93 EXPORT_SYMBOL(sn_coherency_id);
95 EXPORT_SYMBOL(sn_region_size);
96 int sn_prom_type; /* 0=hardware, 1=medusa/realprom, 2=medusa/fakeprom */
98 short physical_node_map[MAX_NUMALINK_NODES];
99 static unsigned long sn_prom_features[MAX_PROM_FEATURE_SETS];
101 EXPORT_SYMBOL(physical_node_map);
105 static void sn_init_pdas(char **);
106 static void build_cnode_tables(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 * This routine can only be used during init, since
142 * smp_boot_data is an init data structure.
143 * We have to use smp_boot_data.cpu_phys_id to find
144 * the physical id of the processor because the normal
145 * cpu_physical_id() relies on data structures that
146 * may not be initialized yet.
149 static int __init pxm_to_nasid(int pxm)
154 nid = pxm_to_nid_map[pxm];
155 for (i = 0; i < num_node_memblks; i++) {
156 if (node_memblk[i].nid == nid) {
157 return NASID_GET(node_memblk[i].start_paddr);
164 * early_sn_setup - early setup routine for SN platforms
166 * Sets up an initial console to aid debugging. Intended primarily
167 * for bringup. See start_kernel() in init/main.c.
170 void __init early_sn_setup(void)
172 efi_system_table_t *efi_systab;
173 efi_config_table_t *config_tables;
174 struct ia64_sal_systab *sal_systab;
175 struct ia64_sal_desc_entry_point *ep;
180 * Parse enough of the SAL tables to locate the SAL entry point. Since, console
181 * IO on SN2 is done via SAL calls, early_printk won't work without this.
183 * This code duplicates some of the ACPI table parsing that is in efi.c & sal.c.
184 * Any changes to those file may have to be made hereas well.
186 efi_systab = (efi_system_table_t *) __va(ia64_boot_param->efi_systab);
187 config_tables = __va(efi_systab->tables);
188 for (i = 0; i < efi_systab->nr_tables; i++) {
189 if (efi_guidcmp(config_tables[i].guid, SAL_SYSTEM_TABLE_GUID) ==
191 sal_systab = __va(config_tables[i].table);
192 p = (char *)(sal_systab + 1);
193 for (j = 0; j < sal_systab->entry_count; j++) {
194 if (*p == SAL_DESC_ENTRY_POINT) {
195 ep = (struct ia64_sal_desc_entry_point
197 ia64_sal_handler_init(__va
202 p += SAL_DESC_SIZE(*p);
206 /* Uh-oh, SAL not available?? */
207 printk(KERN_ERR "failed to find SAL entry point\n");
210 extern int platform_intr_list[];
211 static int __initdata shub_1_1_found = 0;
216 * Set flag for enabling shub specific wars
219 static inline int __init is_shub_1_1(int nasid)
226 id = REMOTE_HUB_L(nasid, SH1_SHUB_ID);
227 rev = (id & SH1_SHUB_ID_REVISION_MASK) >> SH1_SHUB_ID_REVISION_SHFT;
231 static void __init sn_check_for_wars(void)
238 for_each_online_node(cnode) {
239 if (is_shub_1_1(cnodeid_to_nasid(cnode)))
246 * sn_setup - SN platform setup routine
247 * @cmdline_p: kernel command line
249 * Handles platform setup for SN machines. This includes determining
250 * the RTC frequency (via a SAL call), initializing secondary CPUs, and
251 * setting up per-node data areas. The console is also initialized here.
253 void __init sn_setup(char **cmdline_p)
255 long status, ticks_per_sec, drift;
256 u32 version = sn_sal_rev();
257 extern void sn_cpu_init(void);
259 ia64_sn_plat_set_error_handling_features(); // obsolete
260 ia64_sn_set_os_feature(OSF_MCA_SLV_TO_OS_INIT_SLV);
261 ia64_sn_set_os_feature(OSF_FEAT_LOG_SBES);
264 #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
266 * If there was a primary vga adapter identified through the
267 * EFI PCDP table, make it the preferred console. Otherwise
268 * zero out conswitchp.
271 if (vga_console_membase) {
272 /* usable vga ... make tty0 the preferred default console */
273 add_preferred_console("tty", 0, NULL);
275 printk(KERN_DEBUG "SGI: Disabling VGA console\n");
276 #ifdef CONFIG_DUMMY_CONSOLE
277 conswitchp = &dummy_con;
280 #endif /* CONFIG_DUMMY_CONSOLE */
282 #endif /* def(CONFIG_VT) && def(CONFIG_VGA_CONSOLE) */
284 MAX_DMA_ADDRESS = PAGE_OFFSET + MAX_PHYS_MEMORY;
287 * Build the tables for managing cnodes.
289 build_cnode_tables();
292 * Old PROMs do not provide an ACPI FADT. Disable legacy keyboard
293 * support here so we don't have to listen to failed keyboard probe
296 if (version <= 0x0209 && acpi_kbd_controller_present) {
297 printk(KERN_INFO "Disabling legacy keyboard support as prom "
298 "is too old and doesn't provide FADT\n");
299 acpi_kbd_controller_present = 0;
302 printk("SGI SAL version %x.%02x\n", version >> 8, version & 0x00FF);
305 ia64_sal_freq_base(SAL_FREQ_BASE_REALTIME_CLOCK, &ticks_per_sec,
307 if (status != 0 || ticks_per_sec < 100000) {
309 "unable to determine platform RTC clock frequency, guessing.\n");
310 /* PROM gives wrong value for clock freq. so guess */
311 sn_rtc_cycles_per_second = 1000000000000UL / 30000UL;
313 sn_rtc_cycles_per_second = ticks_per_sec;
315 platform_intr_list[ACPI_INTERRUPT_CPEI] = IA64_CPE_VECTOR;
318 * we set the default root device to /dev/hda
319 * to make simulation easy
321 ROOT_DEV = Root_HDA1;
324 * Create the PDAs and NODEPDAs for all the cpus.
326 sn_init_pdas(cmdline_p);
328 ia64_mark_idle = &snidle;
331 * For the bootcpu, we do this here. All other cpus will make the
332 * call as part of cpu_init in slave cpu initialization.
339 screen_info = sn_screen_info;
344 * set pm_power_off to a SAL call to allow
345 * sn machines to power off. The SAL call can be replaced
346 * by an ACPI interface call when ACPI is fully implemented
349 pm_power_off = ia64_sn_power_down;
353 * sn_init_pdas - setup node data areas
355 * One time setup for Node Data Area. Called by sn_setup().
357 static void __init sn_init_pdas(char **cmdline_p)
362 * Allocate & initalize the nodepda for each node.
364 for_each_online_node(cnode) {
366 alloc_bootmem_node(NODE_DATA(cnode), sizeof(nodepda_t));
367 memset(nodepdaindr[cnode], 0, sizeof(nodepda_t));
368 memset(nodepdaindr[cnode]->phys_cpuid, -1,
369 sizeof(nodepdaindr[cnode]->phys_cpuid));
370 spin_lock_init(&nodepdaindr[cnode]->ptc_lock);
374 * Allocate & initialize nodepda for TIOs. For now, put them on node 0.
376 for (cnode = num_online_nodes(); cnode < num_cnodes; cnode++) {
378 alloc_bootmem_node(NODE_DATA(0), sizeof(nodepda_t));
379 memset(nodepdaindr[cnode], 0, sizeof(nodepda_t));
383 * Now copy the array of nodepda pointers to each nodepda.
385 for (cnode = 0; cnode < num_cnodes; cnode++)
386 memcpy(nodepdaindr[cnode]->pernode_pdaindr, nodepdaindr,
387 sizeof(nodepdaindr));
390 * Set up IO related platform-dependent nodepda fields.
391 * The following routine actually sets up the hubinfo struct
394 for_each_online_node(cnode) {
395 bte_init_node(nodepdaindr[cnode], cnode);
399 * Initialize the per node hubdev. This includes IO Nodes and
400 * headless/memless nodes.
402 for (cnode = 0; cnode < num_cnodes; cnode++) {
403 hubdev_init_node(nodepdaindr[cnode], cnode);
408 * sn_cpu_init - initialize per-cpu data areas
409 * @cpuid: cpuid of the caller
411 * Called during cpu initialization on each cpu as it starts.
412 * Currently, initializes the per-cpu data area for SNIA.
413 * Also sets up a few fields in the nodepda. Also known as
414 * platform_cpu_init() by the ia64 machvec code.
416 void __init sn_cpu_init(void)
425 static int wars_have_been_checked;
427 if (smp_processor_id() == 0 && IS_MEDUSA()) {
428 if (ia64_sn_is_fake_prom())
432 printk("Running on medusa with %s PROM\n", (sn_prom_type == 1) ? "real" : "fake");
435 memset(pda, 0, sizeof(pda));
436 if (ia64_sn_get_sn_info(0, &sn_hub_info->shub2, &sn_hub_info->nasid_bitmask, &sn_hub_info->nasid_shift,
437 &sn_system_size, &sn_sharing_domain_size, &sn_partition_id,
438 &sn_coherency_id, &sn_region_size))
440 sn_hub_info->as_shift = sn_hub_info->nasid_shift - 2;
443 * The boot cpu makes this call again after platform initialization is
446 if (nodepdaindr[0] == NULL)
449 for (i = 0; i < MAX_PROM_FEATURE_SETS; i++)
450 if (ia64_sn_get_prom_feature_set(i, &sn_prom_features[i]) != 0)
453 cpuid = smp_processor_id();
454 cpuphyid = get_sapicid();
456 if (ia64_sn_get_sapic_info(cpuphyid, &nasid, &subnode, &slice))
459 for (i=0; i < MAX_NUMNODES; i++) {
460 if (nodepdaindr[i]) {
461 nodepdaindr[i]->phys_cpuid[cpuid].nasid = nasid;
462 nodepdaindr[i]->phys_cpuid[cpuid].slice = slice;
463 nodepdaindr[i]->phys_cpuid[cpuid].subnode = subnode;
467 cnode = nasid_to_cnodeid(nasid);
469 sn_nodepda = nodepdaindr[cnode];
472 (typeof(pda->led_address)) (LED0 + (slice << LED_CPU_SHIFT));
473 pda->led_state = LED_ALWAYS_SET;
474 pda->hb_count = HZ / 2;
479 /* copy cpu 0's sn_cnodeid_to_nasid table to this cpu's */
480 memcpy(sn_cnodeid_to_nasid,
481 (&per_cpu(__sn_cnodeid_to_nasid, 0)),
482 sizeof(__ia64_per_cpu_var(__sn_cnodeid_to_nasid)));
487 * Only needs to be done once, on BSP.
488 * Has to be done after loop above, because it uses this cpu's
489 * sn_cnodeid_to_nasid table which was just initialized if this
491 * Has to be done before assignment below.
493 if (!wars_have_been_checked) {
495 wars_have_been_checked = 1;
497 sn_hub_info->shub_1_1_found = shub_1_1_found;
500 * Set up addresses of PIO/MEM write status registers.
503 u64 pio1[] = {SH1_PIO_WRITE_STATUS_0, 0, SH1_PIO_WRITE_STATUS_1, 0};
504 u64 pio2[] = {SH2_PIO_WRITE_STATUS_0, SH2_PIO_WRITE_STATUS_2,
505 SH2_PIO_WRITE_STATUS_1, SH2_PIO_WRITE_STATUS_3};
507 pio = is_shub1() ? pio1 : pio2;
508 pda->pio_write_status_addr = (volatile unsigned long *) LOCAL_MMR_ADDR(pio[slice]);
509 pda->pio_write_status_val = is_shub1() ? SH_PIO_WRITE_STATUS_PENDING_WRITE_COUNT_MASK : 0;
513 * WAR addresses for SHUB 1.x.
515 if (local_node_data->active_cpu_count++ == 0 && is_shub1()) {
518 cnodeid_to_nasid(numa_node_id() ==
519 num_online_nodes() - 1 ? 0 : numa_node_id() + 1);
520 pda->pio_shub_war_cam_addr =
521 (volatile unsigned long *)GLOBAL_MMR_ADDR(nasid,
527 * Build tables for converting between NASIDs and cnodes.
529 static inline int __init board_needs_cnode(int type)
531 return (type == KLTYPE_SNIA || type == KLTYPE_TIO);
534 void __init build_cnode_tables(void)
540 memset(physical_node_map, -1, sizeof(physical_node_map));
541 memset(sn_cnodeid_to_nasid, -1,
542 sizeof(__ia64_per_cpu_var(__sn_cnodeid_to_nasid)));
545 * First populate the tables with C/M bricks. This ensures that
546 * cnode == node for all C & M bricks.
548 for_each_online_node(node) {
549 nasid = pxm_to_nasid(nid_to_pxm_map[node]);
550 sn_cnodeid_to_nasid[node] = nasid;
551 physical_node_map[nasid] = node;
555 * num_cnodes is total number of C/M/TIO bricks. Because of the 256 node
556 * limit on the number of nodes, we can't use the generic node numbers
557 * for this. Note that num_cnodes is incremented below as TIOs or
558 * headless/memoryless nodes are discovered.
560 num_cnodes = num_online_nodes();
562 /* fakeprom does not support klgraph */
563 if (IS_RUNNING_ON_FAKE_PROM())
566 /* Find TIOs & headless/memoryless nodes and add them to the tables */
567 for_each_online_node(node) {
568 kl_config_hdr_t *klgraph_header;
569 nasid = cnodeid_to_nasid(node);
570 if ((klgraph_header = ia64_sn_get_klconfig_addr(nasid)) == NULL)
572 brd = NODE_OFFSET_TO_LBOARD(nasid, klgraph_header->ch_board_info);
574 if (board_needs_cnode(brd->brd_type) && physical_node_map[brd->brd_nasid] < 0) {
575 sn_cnodeid_to_nasid[num_cnodes] = brd->brd_nasid;
576 physical_node_map[brd->brd_nasid] = num_cnodes++;
578 brd = find_lboard_next(brd);
584 nasid_slice_to_cpuid(int nasid, int slice)
588 for (cpu=0; cpu < NR_CPUS; cpu++)
589 if (cpuid_to_nasid(cpu) == nasid &&
590 cpuid_to_slice(cpu) == slice)
596 int sn_prom_feature_available(int id)
598 if (id >= BITS_PER_LONG * MAX_PROM_FEATURE_SETS)
600 return test_bit(id, sn_prom_features);
602 EXPORT_SYMBOL(sn_prom_feature_available);