Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 621 insertions, 0 deletions

diff --git a/arch/ia64/sn/kernel/setup.c b/arch/ia64/sn/kernel/setup.c
new file mode 100644
index 00000000000..f0306b516af
--- /dev/null
+++ b/arch/ia64/sn/kernel/setup.c
@@ -0,0 +1,621 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1999,2001-2004 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/kdev_t.h>
+#include <linux/string.h>
+#include <linux/tty.h>
+#include <linux/console.h>
+#include <linux/timex.h>
+#include <linux/sched.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/serial.h>
+#include <linux/irq.h>
+#include <linux/bootmem.h>
+#include <linux/mmzone.h>
+#include <linux/interrupt.h>
+#include <linux/acpi.h>
+#include <linux/compiler.h>
+#include <linux/sched.h>
+#include <linux/root_dev.h>
+#include <linux/nodemask.h>
+
+#include <asm/io.h>
+#include <asm/sal.h>
+#include <asm/machvec.h>
+#include <asm/system.h>
+#include <asm/processor.h>
+#include <asm/sn/arch.h>
+#include <asm/sn/addrs.h>
+#include <asm/sn/pda.h>
+#include <asm/sn/nodepda.h>
+#include <asm/sn/sn_cpuid.h>
+#include <asm/sn/simulator.h>
+#include <asm/sn/leds.h>
+#include <asm/sn/bte.h>
+#include <asm/sn/shub_mmr.h>
+#include <asm/sn/clksupport.h>
+#include <asm/sn/sn_sal.h>
+#include <asm/sn/geo.h>
+#include "xtalk/xwidgetdev.h"
+#include "xtalk/hubdev.h"
+#include <asm/sn/klconfig.h>
+
+
+DEFINE_PER_CPU(struct pda_s, pda_percpu);
+
+#define MAX_PHYS_MEMORY		(1UL << 49)	/* 1 TB */
+
+lboard_t *root_lboard[MAX_COMPACT_NODES];
+
+extern void bte_init_node(nodepda_t *, cnodeid_t);
+
+extern void sn_timer_init(void);
+extern unsigned long last_time_offset;
+extern void (*ia64_mark_idle) (int);
+extern void snidle(int);
+extern unsigned char acpi_kbd_controller_present;
+
+unsigned long sn_rtc_cycles_per_second;
+EXPORT_SYMBOL(sn_rtc_cycles_per_second);
+
+DEFINE_PER_CPU(struct sn_hub_info_s, __sn_hub_info);
+EXPORT_PER_CPU_SYMBOL(__sn_hub_info);
+
+partid_t sn_partid = -1;
+EXPORT_SYMBOL(sn_partid);
+char sn_system_serial_number_string[128];
+EXPORT_SYMBOL(sn_system_serial_number_string);
+u64 sn_partition_serial_number;
+EXPORT_SYMBOL(sn_partition_serial_number);
+u8 sn_partition_id;
+EXPORT_SYMBOL(sn_partition_id);
+u8 sn_system_size;
+EXPORT_SYMBOL(sn_system_size);
+u8 sn_sharing_domain_size;
+EXPORT_SYMBOL(sn_sharing_domain_size);
+u8 sn_coherency_id;
+EXPORT_SYMBOL(sn_coherency_id);
+u8 sn_region_size;
+EXPORT_SYMBOL(sn_region_size);
+
+short physical_node_map[MAX_PHYSNODE_ID];
+
+EXPORT_SYMBOL(physical_node_map);
+
+int numionodes;
+
+static void sn_init_pdas(char **);
+static void scan_for_ionodes(void);
+
+static nodepda_t *nodepdaindr[MAX_COMPACT_NODES];
+
+/*
+ * The format of "screen_info" is strange, and due to early i386-setup
+ * code. This is just enough to make the console code think we're on a
+ * VGA color display.
+ */
+struct screen_info sn_screen_info = {
+	.orig_x = 0,
+	.orig_y = 0,
+	.orig_video_mode = 3,
+	.orig_video_cols = 80,
+	.orig_video_ega_bx = 3,
+	.orig_video_lines = 25,
+	.orig_video_isVGA = 1,
+	.orig_video_points = 16
+};
+
+/*
+ * This is here so we can use the CMOS detection in ide-probe.c to
+ * determine what drives are present.  In theory, we don't need this
+ * as the auto-detection could be done via ide-probe.c:do_probe() but
+ * in practice that would be much slower, which is painful when
+ * running in the simulator.  Note that passing zeroes in DRIVE_INFO
+ * is sufficient (the IDE driver will autodetect the drive geometry).
+ */
+#ifdef CONFIG_IA64_GENERIC
+extern char drive_info[4 * 16];
+#else
+char drive_info[4 * 16];
+#endif
+
+/*
+ * Get nasid of current cpu early in boot before nodepda is initialized
+ */
+static int
+boot_get_nasid(void)
+{
+	int nasid;
+
+	if (ia64_sn_get_sapic_info(get_sapicid(), &nasid, NULL, NULL))
+		BUG();
+	return nasid;
+}
+
+/*
+ * This routine can only be used during init, since
+ * smp_boot_data is an init data structure.
+ * We have to use smp_boot_data.cpu_phys_id to find
+ * the physical id of the processor because the normal
+ * cpu_physical_id() relies on data structures that
+ * may not be initialized yet.
+ */
+
+static int __init pxm_to_nasid(int pxm)
+{
+	int i;
+	int nid;
+
+	nid = pxm_to_nid_map[pxm];
+	for (i = 0; i < num_node_memblks; i++) {
+		if (node_memblk[i].nid == nid) {
+			return NASID_GET(node_memblk[i].start_paddr);
+		}
+	}
+	return -1;
+}
+
+/**
+ * early_sn_setup - early setup routine for SN platforms
+ *
+ * Sets up an initial console to aid debugging.  Intended primarily
+ * for bringup.  See start_kernel() in init/main.c.
+ */
+
+void __init early_sn_setup(void)
+{
+	efi_system_table_t *efi_systab;
+	efi_config_table_t *config_tables;
+	struct ia64_sal_systab *sal_systab;
+	struct ia64_sal_desc_entry_point *ep;
+	char *p;
+	int i, j;
+
+	/*
+	 * Parse enough of the SAL tables to locate the SAL entry point. Since, console
+	 * IO on SN2 is done via SAL calls, early_printk won't work without this.
+	 *
+	 * This code duplicates some of the ACPI table parsing that is in efi.c & sal.c.
+	 * Any changes to those file may have to be made hereas well.
+	 */
+	efi_systab = (efi_system_table_t *) __va(ia64_boot_param->efi_systab);
+	config_tables = __va(efi_systab->tables);
+	for (i = 0; i < efi_systab->nr_tables; i++) {
+		if (efi_guidcmp(config_tables[i].guid, SAL_SYSTEM_TABLE_GUID) ==
+		    0) {
+			sal_systab = __va(config_tables[i].table);
+			p = (char *)(sal_systab + 1);
+			for (j = 0; j < sal_systab->entry_count; j++) {
+				if (*p == SAL_DESC_ENTRY_POINT) {
+					ep = (struct ia64_sal_desc_entry_point
+					      *)p;
+					ia64_sal_handler_init(__va
+							      (ep->sal_proc),
+							      __va(ep->gp));
+					return;
+				}
+				p += SAL_DESC_SIZE(*p);
+			}
+		}
+	}
+	/* Uh-oh, SAL not available?? */
+	printk(KERN_ERR "failed to find SAL entry point\n");
+}
+
+extern int platform_intr_list[];
+extern nasid_t master_nasid;
+static int shub_1_1_found __initdata;
+
+/*
+ * sn_check_for_wars
+ *
+ * Set flag for enabling shub specific wars
+ */
+
+static inline int __init is_shub_1_1(int nasid)
+{
+	unsigned long id;
+	int rev;
+
+	if (is_shub2())
+		return 0;
+	id = REMOTE_HUB_L(nasid, SH1_SHUB_ID);
+	rev = (id & SH1_SHUB_ID_REVISION_MASK) >> SH1_SHUB_ID_REVISION_SHFT;
+	return rev <= 2;
+}
+
+static void __init sn_check_for_wars(void)
+{
+	int cnode;
+
+	if (is_shub2()) {
+		/* none yet */
+	} else {
+		for_each_online_node(cnode) {
+			if (is_shub_1_1(cnodeid_to_nasid(cnode)))
+				sn_hub_info->shub_1_1_found = 1;
+		}
+	}
+}
+
+/**
+ * sn_setup - SN platform setup routine
+ * @cmdline_p: kernel command line
+ *
+ * Handles platform setup for SN machines.  This includes determining
+ * the RTC frequency (via a SAL call), initializing secondary CPUs, and
+ * setting up per-node data areas.  The console is also initialized here.
+ */
+void __init sn_setup(char **cmdline_p)
+{
+	long status, ticks_per_sec, drift;
+	int pxm;
+	int major = sn_sal_rev_major(), minor = sn_sal_rev_minor();
+	extern void sn_cpu_init(void);
+
+	/*
+	 * If the generic code has enabled vga console support - lets
+	 * get rid of it again. This is a kludge for the fact that ACPI
+	 * currtently has no way of informing us if legacy VGA is available
+	 * or not.
+	 */
+#if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
+	if (conswitchp == &vga_con) {
+		printk(KERN_DEBUG "SGI: Disabling VGA console\n");
+#ifdef CONFIG_DUMMY_CONSOLE
+		conswitchp = &dummy_con;
+#else
+		conswitchp = NULL;
+#endif				/* CONFIG_DUMMY_CONSOLE */
+	}
+#endif				/* def(CONFIG_VT) && def(CONFIG_VGA_CONSOLE) */
+
+	MAX_DMA_ADDRESS = PAGE_OFFSET + MAX_PHYS_MEMORY;
+
+	memset(physical_node_map, -1, sizeof(physical_node_map));
+	for (pxm = 0; pxm < MAX_PXM_DOMAINS; pxm++)
+		if (pxm_to_nid_map[pxm] != -1)
+			physical_node_map[pxm_to_nasid(pxm)] =
+			    pxm_to_nid_map[pxm];
+
+	/*
+	 * Old PROMs do not provide an ACPI FADT. Disable legacy keyboard
+	 * support here so we don't have to listen to failed keyboard probe
+	 * messages.
+	 */
+	if ((major < 2 || (major == 2 && minor <= 9)) &&
+	    acpi_kbd_controller_present) {
+		printk(KERN_INFO "Disabling legacy keyboard support as prom "
+		       "is too old and doesn't provide FADT\n");
+		acpi_kbd_controller_present = 0;
+	}
+
+	printk("SGI SAL version %x.%02x\n", major, minor);
+
+	/*
+	 * Confirm the SAL we're running on is recent enough...
+	 */
+	if ((major < SN_SAL_MIN_MAJOR) || (major == SN_SAL_MIN_MAJOR &&
+					   minor < SN_SAL_MIN_MINOR)) {
+		printk(KERN_ERR "This kernel needs SGI SAL version >= "
+		       "%x.%02x\n", SN_SAL_MIN_MAJOR, SN_SAL_MIN_MINOR);
+		panic("PROM version too old\n");
+	}
+
+	master_nasid = boot_get_nasid();
+
+	status =
+	    ia64_sal_freq_base(SAL_FREQ_BASE_REALTIME_CLOCK, &ticks_per_sec,
+			       &drift);
+	if (status != 0 || ticks_per_sec < 100000) {
+		printk(KERN_WARNING
+		       "unable to determine platform RTC clock frequency, guessing.\n");
+		/* PROM gives wrong value for clock freq. so guess */
+		sn_rtc_cycles_per_second = 1000000000000UL / 30000UL;
+	} else
+		sn_rtc_cycles_per_second = ticks_per_sec;
+
+	platform_intr_list[ACPI_INTERRUPT_CPEI] = IA64_CPE_VECTOR;
+
+	/*
+	 * we set the default root device to /dev/hda
+	 * to make simulation easy
+	 */
+	ROOT_DEV = Root_HDA1;
+
+	/*
+	 * Create the PDAs and NODEPDAs for all the cpus.
+	 */
+	sn_init_pdas(cmdline_p);
+
+	ia64_mark_idle = &snidle;
+
+	/* 
+	 * For the bootcpu, we do this here. All other cpus will make the
+	 * call as part of cpu_init in slave cpu initialization.
+	 */
+	sn_cpu_init();
+
+#ifdef CONFIG_SMP
+	init_smp_config();
+#endif
+	screen_info = sn_screen_info;
+
+	sn_timer_init();
+}
+
+/**
+ * sn_init_pdas - setup node data areas
+ *
+ * One time setup for Node Data Area.  Called by sn_setup().
+ */
+static void __init sn_init_pdas(char **cmdline_p)
+{
+	cnodeid_t cnode;
+
+	memset(pda->cnodeid_to_nasid_table, -1,
+	       sizeof(pda->cnodeid_to_nasid_table));
+	for_each_online_node(cnode)
+		pda->cnodeid_to_nasid_table[cnode] =
+		    pxm_to_nasid(nid_to_pxm_map[cnode]);
+
+	numionodes = num_online_nodes();
+	scan_for_ionodes();
+
+	/*
+	 * Allocate & initalize the nodepda for each node.
+	 */
+	for_each_online_node(cnode) {
+		nodepdaindr[cnode] =
+		    alloc_bootmem_node(NODE_DATA(cnode), sizeof(nodepda_t));
+		memset(nodepdaindr[cnode], 0, sizeof(nodepda_t));
+		memset(nodepdaindr[cnode]->phys_cpuid, -1, 
+		    sizeof(nodepdaindr[cnode]->phys_cpuid));
+	}
+
+	/*
+	 * Allocate & initialize nodepda for TIOs.  For now, put them on node 0.
+	 */
+	for (cnode = num_online_nodes(); cnode < numionodes; cnode++) {
+		nodepdaindr[cnode] =
+		    alloc_bootmem_node(NODE_DATA(0), sizeof(nodepda_t));
+		memset(nodepdaindr[cnode], 0, sizeof(nodepda_t));
+	}
+
+	/*
+	 * Now copy the array of nodepda pointers to each nodepda.
+	 */
+	for (cnode = 0; cnode < numionodes; cnode++)
+		memcpy(nodepdaindr[cnode]->pernode_pdaindr, nodepdaindr,
+		       sizeof(nodepdaindr));
+
+	/*
+	 * Set up IO related platform-dependent nodepda fields.
+	 * The following routine actually sets up the hubinfo struct
+	 * in nodepda.
+	 */
+	for_each_online_node(cnode) {
+		bte_init_node(nodepdaindr[cnode], cnode);
+	}
+
+	/*
+	 * Initialize the per node hubdev.  This includes IO Nodes and 
+	 * headless/memless nodes.
+	 */
+	for (cnode = 0; cnode < numionodes; cnode++) {
+		hubdev_init_node(nodepdaindr[cnode], cnode);
+	}
+}
+
+/**
+ * sn_cpu_init - initialize per-cpu data areas
+ * @cpuid: cpuid of the caller
+ *
+ * Called during cpu initialization on each cpu as it starts.
+ * Currently, initializes the per-cpu data area for SNIA.
+ * Also sets up a few fields in the nodepda.  Also known as
+ * platform_cpu_init() by the ia64 machvec code.
+ */
+void __init sn_cpu_init(void)
+{
+	int cpuid;
+	int cpuphyid;
+	int nasid;
+	int subnode;
+	int slice;
+	int cnode;
+	int i;
+	static int wars_have_been_checked;
+
+	memset(pda, 0, sizeof(pda));
+	if (ia64_sn_get_sn_info(0, &sn_hub_info->shub2, &sn_hub_info->nasid_bitmask, &sn_hub_info->nasid_shift,
+				&sn_system_size, &sn_sharing_domain_size, &sn_partition_id,
+				&sn_coherency_id, &sn_region_size))
+		BUG();
+	sn_hub_info->as_shift = sn_hub_info->nasid_shift - 2;
+
+	/*
+	 * The boot cpu makes this call again after platform initialization is
+	 * complete.
+	 */
+	if (nodepdaindr[0] == NULL)
+		return;
+
+	cpuid = smp_processor_id();
+	cpuphyid = get_sapicid();
+
+	if (ia64_sn_get_sapic_info(cpuphyid, &nasid, &subnode, &slice))
+		BUG();
+
+	for (i=0; i < MAX_NUMNODES; i++) {
+		if (nodepdaindr[i]) {
+			nodepdaindr[i]->phys_cpuid[cpuid].nasid = nasid;
+			nodepdaindr[i]->phys_cpuid[cpuid].slice = slice;
+			nodepdaindr[i]->phys_cpuid[cpuid].subnode = subnode;
+		}
+	}
+
+	cnode = nasid_to_cnodeid(nasid);
+
+	pda->p_nodepda = nodepdaindr[cnode];
+	pda->led_address =
+	    (typeof(pda->led_address)) (LED0 + (slice << LED_CPU_SHIFT));
+	pda->led_state = LED_ALWAYS_SET;
+	pda->hb_count = HZ / 2;
+	pda->hb_state = 0;
+	pda->idle_flag = 0;
+
+	if (cpuid != 0) {
+		memcpy(pda->cnodeid_to_nasid_table,
+		       pdacpu(0)->cnodeid_to_nasid_table,
+		       sizeof(pda->cnodeid_to_nasid_table));
+	}
+
+	/*
+	 * Check for WARs.
+	 * Only needs to be done once, on BSP.
+	 * Has to be done after loop above, because it uses pda.cnodeid_to_nasid_table[i].
+	 * Has to be done before assignment below.
+	 */
+	if (!wars_have_been_checked) {
+		sn_check_for_wars();
+		wars_have_been_checked = 1;
+	}
+	sn_hub_info->shub_1_1_found = shub_1_1_found;
+
+	/*
+	 * Set up addresses of PIO/MEM write status registers.
+	 */
+	{
+		u64 pio1[] = {SH1_PIO_WRITE_STATUS_0, 0, SH1_PIO_WRITE_STATUS_1, 0};
+		u64 pio2[] = {SH2_PIO_WRITE_STATUS_0, SH2_PIO_WRITE_STATUS_1, 
+			SH2_PIO_WRITE_STATUS_2, SH2_PIO_WRITE_STATUS_3};
+		u64 *pio;
+		pio = is_shub1() ? pio1 : pio2;
+		pda->pio_write_status_addr = (volatile unsigned long *) LOCAL_MMR_ADDR(pio[slice]);
+		pda->pio_write_status_val = is_shub1() ? SH_PIO_WRITE_STATUS_PENDING_WRITE_COUNT_MASK : 0;
+	}
+
+	/*
+	 * WAR addresses for SHUB 1.x.
+	 */
+	if (local_node_data->active_cpu_count++ == 0 && is_shub1()) {
+		int buddy_nasid;
+		buddy_nasid =
+		    cnodeid_to_nasid(numa_node_id() ==
+				     num_online_nodes() - 1 ? 0 : numa_node_id() + 1);
+		pda->pio_shub_war_cam_addr =
+		    (volatile unsigned long *)GLOBAL_MMR_ADDR(nasid,
+							      SH1_PI_CAM_CONTROL);
+	}
+}
+
+/*
+ * Scan klconfig for ionodes.  Add the nasids to the
+ * physical_node_map and the pda and increment numionodes.
+ */
+
+static void __init scan_for_ionodes(void)
+{
+	int nasid = 0;
+	lboard_t *brd;
+
+	/* Setup ionodes with memory */
+	for (nasid = 0; nasid < MAX_PHYSNODE_ID; nasid += 2) {
+		char *klgraph_header;
+		cnodeid_t cnodeid;
+
+		if (physical_node_map[nasid] == -1)
+			continue;
+
+		cnodeid = -1;
+		klgraph_header = __va(ia64_sn_get_klconfig_addr(nasid));
+		if (!klgraph_header) {
+			if (IS_RUNNING_ON_SIMULATOR())
+				continue;
+			BUG();	/* All nodes must have klconfig tables! */
+		}
+		cnodeid = nasid_to_cnodeid(nasid);
+		root_lboard[cnodeid] = (lboard_t *)
+		    NODE_OFFSET_TO_LBOARD((nasid),
+					  ((kl_config_hdr_t
+					    *) (klgraph_header))->
+					  ch_board_info);
+	}
+
+	/* Scan headless/memless IO Nodes. */
+	for (nasid = 0; nasid < MAX_PHYSNODE_ID; nasid += 2) {
+		/* if there's no nasid, don't try to read the klconfig on the node */
+		if (physical_node_map[nasid] == -1)
+			continue;
+		brd = find_lboard_any((lboard_t *)
+				      root_lboard[nasid_to_cnodeid(nasid)],
+				      KLTYPE_SNIA);
+		if (brd) {
+			brd = KLCF_NEXT_ANY(brd);	/* Skip this node's lboard */
+			if (!brd)
+				continue;
+		}
+
+		brd = find_lboard_any(brd, KLTYPE_SNIA);
+
+		while (brd) {
+			pda->cnodeid_to_nasid_table[numionodes] =
+			    brd->brd_nasid;
+			physical_node_map[brd->brd_nasid] = numionodes;
+			root_lboard[numionodes] = brd;
+			numionodes++;
+			brd = KLCF_NEXT_ANY(brd);
+			if (!brd)
+				break;
+
+			brd = find_lboard_any(brd, KLTYPE_SNIA);
+		}
+	}
+
+	/* Scan for TIO nodes. */
+	for (nasid = 0; nasid < MAX_PHYSNODE_ID; nasid += 2) {
+		/* if there's no nasid, don't try to read the klconfig on the node */
+		if (physical_node_map[nasid] == -1)
+			continue;
+		brd = find_lboard_any((lboard_t *)
+				      root_lboard[nasid_to_cnodeid(nasid)],
+				      KLTYPE_TIO);
+		while (brd) {
+			pda->cnodeid_to_nasid_table[numionodes] =
+			    brd->brd_nasid;
+			physical_node_map[brd->brd_nasid] = numionodes;
+			root_lboard[numionodes] = brd;
+			numionodes++;
+			brd = KLCF_NEXT_ANY(brd);
+			if (!brd)
+				break;
+
+			brd = find_lboard_any(brd, KLTYPE_TIO);
+		}
+	}
+
+}
+
+int
+nasid_slice_to_cpuid(int nasid, int slice)
+{
+	long cpu;
+	
+	for (cpu=0; cpu < NR_CPUS; cpu++) 
+		if (nodepda->phys_cpuid[cpu].nasid == nasid && nodepda->phys_cpuid[cpu].slice == slice)
+			return cpu;
+
+	return -1;
+}