setup.c

linux-2.4.29操作系统的源码

 * @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");
	}

	/* Patch the ivt */
	sn2_replace_ivt();

	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 = to_kdev_t(0x0301);

	/*
	 * 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;

	ia64_platform_timer_extras = &sn_timer_interrupt_extras;

	sn_timer_init();
}

/**
 * sn_init_pdas - setup node data areas
 *
 * One time setup for Node Data Area.  Called by sn_setup().
 */
void
sn_init_pdas(char **cmdline_p)
{
	cnodeid_t	cnode;
	void scan_for_ionodes(void);

	/*
	 * Make sure that the PDA fits entirely in the same page as the 
	 * cpu_data area.
	 */
	if ((PDAADDR&~PAGE_MASK)+sizeof(pda_t) > PAGE_SIZE)
		panic("overflow of cpu_data page");

	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));
        }

	/* 
	 * Allocate & initialize nodepda for TIOs.  For now, put them on node 0.
	 */
	for (cnode = numnodes; 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 (cnode = 0; cnode < numnodes; cnode++) {
		init_platform_nodepda(nodepdaindr[cnode], cnode);
		spin_lock_init(&nodepdaindr[cnode]->bist_lock);
		bte_init_node (nodepdaindr[cnode], cnode);
	}

	/*
	 * Handle TIO differently .. we do not do BTE init ..
	 */
	for (cnode = numnodes; cnode < numionodes; cnode++) {
		init_platform_nodepda(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, i;
	static int	wars_have_been_checked = 0;

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

	cpuid = smp_processor_id();
	cpuphyid = ((ia64_get_lid() >> 16) & 0xffff);
	nasid = cpu_physical_id_to_nasid(cpuphyid);
	cnode = nasid_to_cnodeid(nasid);
	slice = cpu_physical_id_to_slice(cpuphyid);

	printk("CPU %d: nasid %d, slice %d, cnode %d\n",
			smp_processor_id(), nasid, slice, cnode);

	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;
	
	memset(pda.cnodeid_to_nasid_table, -1, sizeof(pda.cnodeid_to_nasid_table));
	for (i=0; i<numnodes; i++)
		pda.cnodeid_to_nasid_table[i] = pxm_to_nasid(nid_to_pxm_map[i]);
	/*
	 * 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 TIO's.  Add the TIO nasids to the
 * physical_node_map and the pda and increment numionodes.
 */

void
scan_for_ionodes() {
	int nasid = 0;
	lboard_t *brd;

	/* Scan all compute 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((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_TIO);
		while (brd) {
			pda.cnodeid_to_nasid_table[numionodes] = brd->brd_nasid;
			physical_node_map[brd->brd_nasid] = numionodes++;
			brd = KLCF_NEXT(brd);
			brd = find_lboard(brd, KLTYPE_TIO);
		}
	}
}