[PATCH] ia64: Remove SN PDA page overflow check

[linux-2.6/history.git] / arch / ia64 / sn / kernel / setup.c

/*
 * 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) 1999,2001-2003 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 <asm/io.h>
#include <asm/sal.h>
#include <asm/machvec.h>
#include <asm/system.h>
#include <asm/processor.h>
#include <asm/sn/sgi.h>
#include <asm/sn/io.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/sn_private.h>
#include <asm/sn/simulator.h>
#include <asm/sn/leds.h>
#include <asm/sn/bte.h>
#include <asm/sn/clksupport.h>
#include <asm/sn/sn_sal.h>
#include <asm/sn/sn2/shub.h>

DEFINE_PER_CPU(struct pda_s, pda_percpu);

#define MAX_PHYS_MEMORY         (1UL << 49)     /* 1 TB */

extern void bte_init_node (nodepda_t *, cnodeid_t);
extern void bte_init_cpu (void);
extern void sn_timer_init(void);
extern unsigned long last_time_offset;
extern void init_platform_hubinfo(nodepda_t **nodepdaindr);
extern void (*ia64_mark_idle)(int);
extern void snidle(int);
extern unsigned char acpi_kbd_controller_present;


unsigned long sn_rtc_cycles_per_second;   

partid_t sn_partid = -1;
char sn_system_serial_number_string[128];
u64 sn_partition_serial_number;

short physical_node_map[MAX_PHYSNODE_ID];

EXPORT_SYMBOL(physical_node_map);

int     numionodes;
/*
 * This is the address of the RRegs in the HSpace of the global
 * master.  It is used by a hack in serial.c (serial_[in|out],
 * printk.c (early_printk), and kdb_io.c to put console output on that
 * node's Bedrock UART.  It is initialized here to 0, so that
 * early_printk won't try to access the UART before
 * master_node_bedrock_address is properly calculated.
 */
u64 master_node_bedrock_address;

static void sn_init_pdas(char **);
static void scan_for_ionodes(void);


static nodepda_t        *nodepdaindr[MAX_COMPACT_NODES];

irqpda_t                *irqpdaindr;


/*
 * 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

/*
 * 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)
{
        void ia64_sal_handler_init (void *entry_point, void *gpval);
        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;

        /*
         * 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 (i = 0; i < sal_systab->entry_count; i++) {
                                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));
                                        break;
                                }
                                p += SAL_DESC_SIZE(*p);
                        }
                }
        }

        if ( IS_RUNNING_ON_SIMULATOR() ) {
                master_node_bedrock_address = (u64)REMOTE_HUB(get_nasid(), SH_JUNK_BUS_UART0);
                printk(KERN_DEBUG "early_sn_setup: setting master_node_bedrock_address to 0x%lx\n", master_node_bedrock_address);
        }
}

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;

        id = REMOTE_HUB_L(nasid, SH_SHUB_ID);
        rev =  (id & SH_SHUB_ID_REVISION_MASK) >> SH_SHUB_ID_REVISION_SHFT;
        return rev <= 2;
}

static void __init
sn_check_for_wars(void)
{
        int     cnode;

        for (cnode=0; cnode< numnodes; cnode++)
                if (is_shub_1_1(cnodeid_to_nasid(cnode)))
                        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 nasid_t snia_get_master_baseio_nasid(void);
        extern void sn_cpu_init(void);
        extern nasid_t snia_get_console_nasid(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 = get_nasid();
        (void)snia_get_console_nasid();
        (void)snia_get_master_baseio_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;


        if ( IS_RUNNING_ON_SIMULATOR() )
        {
                master_node_bedrock_address = (u64)REMOTE_HUB(get_nasid(), SH_JUNK_BUS_UART0);
                printk(KERN_DEBUG "sn_setup: setting master_node_bedrock_address to 0x%lx\n",
                       master_node_bedrock_address);
        }

        /*
         * 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();

        /*
         * Setup hubinfo stuff. Has to happen AFTER sn_cpu_init(),
         * because it uses the cnode to nasid tables.
         */
        init_platform_hubinfo(nodepdaindr);

#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().
 */
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 (cnode=0; cnode<numnodes; cnode++)
                pda->cnodeid_to_nasid_table[cnode] = pxm_to_nasid(nid_to_pxm_map[cnode]);

        numionodes = numnodes;
        scan_for_ionodes();

        /*
         * Allocate & initalize the nodepda for each node.
         */
        for (cnode=0; cnode < numnodes; cnode++) {
                nodepdaindr[cnode] = alloc_bootmem_node(NODE_DATA(cnode), 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 (cnode = 0; cnode < numnodes; cnode++) {
                init_platform_nodepda(nodepdaindr[cnode], cnode);
                bte_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     slice;
        int     cnode;
        static int      wars_have_been_checked;

        /*
         * The boot cpu makes this call again after platform initialization is
         * complete.
         */
        if (nodepdaindr[0] == NULL)
                return;

        cpuid = smp_processor_id();
        cpuphyid = ((ia64_getreg(_IA64_REG_CR_LID) >> 16) & 0xffff);
        nasid = cpu_physical_id_to_nasid(cpuphyid);
        cnode = nasid_to_cnodeid(nasid);
        slice = cpu_physical_id_to_slice(cpuphyid);

        memset(pda, 0, sizeof(pda));
        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;
        }
        pda->shub_1_1_found = shub_1_1_found;
        
        if (local_node_data->active_cpu_count == 1)
                nodepda->node_first_cpu = cpuid;



        /*
         * We must use different memory allocators for first cpu (bootmem 
         * allocator) than for the other cpus (regular allocator).
         */
        if (cpuid == 0)
                irqpdaindr = alloc_bootmem_node(NODE_DATA(cpuid_to_cnodeid(cpuid)),sizeof(irqpda_t));

        memset(irqpdaindr, 0, sizeof(irqpda_t));
        irqpdaindr->irq_flags[SGI_PCIBR_ERROR] = SN2_IRQ_SHARED;
        irqpdaindr->irq_flags[SGI_PCIBR_ERROR] |= SN2_IRQ_RESERVED;
        irqpdaindr->irq_flags[SGI_II_ERROR] = SN2_IRQ_SHARED;
        irqpdaindr->irq_flags[SGI_II_ERROR] |= SN2_IRQ_RESERVED;

        pda->pio_write_status_addr = (volatile unsigned long *)
                        LOCAL_MMR_ADDR((slice < 2 ? SH_PIO_WRITE_STATUS_0 : SH_PIO_WRITE_STATUS_1 ) );
        pda->mem_write_status_addr = (volatile u64 *)
                        LOCAL_MMR_ADDR((slice < 2 ? SH_MEMORY_WRITE_STATUS_0 : SH_MEMORY_WRITE_STATUS_1 ) );

        if (nodepda->node_first_cpu == cpuid) {
                int     buddy_nasid;
                buddy_nasid = cnodeid_to_nasid(numa_node_id() == numnodes-1 ? 0 : numa_node_id()+ 1);
                pda->pio_shub_war_cam_addr = (volatile unsigned long*)GLOBAL_MMR_ADDR(nasid, SH_PI_CAM_CONTROL);
        }

        bte_init_cpu();
}

/*
 * 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) {
                u64 klgraph_header;
                cnodeid_t cnodeid;

                if (physical_node_map[nasid] == -1) 
                        continue;

                klgraph_header = cnodeid = -1;
                klgraph_header = ia64_sn_get_klconfig_addr(nasid);
                if (klgraph_header <= 0) {
                        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);
                }
        }
}