arch/x86/kernel/genx2apic_uv_x.c - maze/linux - Git at Google

 /*
  * 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.
  *
  * SGI UV APIC functions (note: not an Intel compatible APIC)
  *
  * Copyright (C) 2007-2008 Silicon Graphics, Inc. All rights reserved.
  */

 #include <linux/kernel.h>
 #include <linux/threads.h>
 #include <linux/cpumask.h>
 #include <linux/string.h>
 #include <linux/ctype.h>
 #include <linux/init.h>
 #include <linux/sched.h>
 #include <linux/bootmem.h>
 #include <linux/module.h>
 #include <linux/hardirq.h>
 #include <asm/smp.h>
 #include <asm/ipi.h>
 #include <asm/genapic.h>
 #include <asm/pgtable.h>
 #include <asm/uv/uv_mmrs.h>
 #include <asm/uv/uv_hub.h>
 #include <asm/uv/bios.h>

 DEFINE_PER_CPU(int, x2apic_extra_bits);

 static enum uv_system_type uv_system_type;

 static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 {
 	if (!strcmp(oem_id, "SGI")) {
 		if (!strcmp(oem_table_id, "UVL"))
 			uv_system_type = UV_LEGACY_APIC;
 		else if (!strcmp(oem_table_id, "UVX"))
 			uv_system_type = UV_X2APIC;
 		else if (!strcmp(oem_table_id, "UVH")) {
 			uv_system_type = UV_NON_UNIQUE_APIC;
 			return 1;
 		}
 	}
 	return 0;
 }

 enum uv_system_type get_uv_system_type(void)
 {
 	return uv_system_type;
 }

 int is_uv_system(void)
 {
 	return uv_system_type != UV_NONE;
 }
 EXPORT_SYMBOL_GPL(is_uv_system);

 DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
 EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);

 struct uv_blade_info *uv_blade_info;
 EXPORT_SYMBOL_GPL(uv_blade_info);

 short *uv_node_to_blade;
 EXPORT_SYMBOL_GPL(uv_node_to_blade);

 short *uv_cpu_to_blade;
 EXPORT_SYMBOL_GPL(uv_cpu_to_blade);

 short uv_possible_blades;
 EXPORT_SYMBOL_GPL(uv_possible_blades);

 unsigned long sn_rtc_cycles_per_second;
 EXPORT_SYMBOL(sn_rtc_cycles_per_second);

 /* Start with all IRQs pointing to boot CPU.  IRQ balancing will shift them. */

 static cpumask_t uv_target_cpus(void)
 {
 	return cpumask_of_cpu(0);
 }

 static cpumask_t uv_vector_allocation_domain(int cpu)
 {
 	cpumask_t domain = CPU_MASK_NONE;
 	cpu_set(cpu, domain);
 	return domain;
 }

 int uv_wakeup_secondary(int phys_apicid, unsigned int start_rip)
 {
 	unsigned long val;
 	int pnode;

 	pnode = uv_apicid_to_pnode(phys_apicid);
 	val = (1UL << UVH_IPI_INT_SEND_SHFT) |
 	    (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
 	    (((long)start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
 	    APIC_DM_INIT;
 	uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
 	mdelay(10);

 	val = (1UL << UVH_IPI_INT_SEND_SHFT) |
 	    (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
 	    (((long)start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
 	    APIC_DM_STARTUP;
 	uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
 	return 0;
 }

 static void uv_send_IPI_one(int cpu, int vector)
 {
 	unsigned long val, apicid, lapicid;
 	int pnode;

 	apicid = per_cpu(x86_cpu_to_apicid, cpu);
 	lapicid = apicid & 0x3f;		/* ZZZ macro needed */
 	pnode = uv_apicid_to_pnode(apicid);
 	val =
 	    (1UL << UVH_IPI_INT_SEND_SHFT) | (lapicid <<
 					      UVH_IPI_INT_APIC_ID_SHFT) |
 	    (vector << UVH_IPI_INT_VECTOR_SHFT);
 	uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
 }

 static void uv_send_IPI_mask(cpumask_t mask, int vector)
 {
 	unsigned int cpu;

 	for_each_possible_cpu(cpu)
 		if (cpu_isset(cpu, mask))
 			uv_send_IPI_one(cpu, vector);
 }

 static void uv_send_IPI_allbutself(int vector)
 {
 	cpumask_t mask = cpu_online_map;

 	cpu_clear(smp_processor_id(), mask);

 	if (!cpus_empty(mask))
 		uv_send_IPI_mask(mask, vector);
 }

 static void uv_send_IPI_all(int vector)
 {
 	uv_send_IPI_mask(cpu_online_map, vector);
 }

 static int uv_apic_id_registered(void)
 {
 	return 1;
 }

 static void uv_init_apic_ldr(void)
 {
 }

 static unsigned int uv_cpu_mask_to_apicid(cpumask_t cpumask)
 {
 	int cpu;

 	/*
 	 * We're using fixed IRQ delivery, can only return one phys APIC ID.
 	 * May as well be the first.
 	 */
 	cpu = first_cpu(cpumask);
 	if ((unsigned)cpu < nr_cpu_ids)
 		return per_cpu(x86_cpu_to_apicid, cpu);
 	else
 		return BAD_APICID;
 }

 static unsigned int get_apic_id(unsigned long x)
 {
 	unsigned int id;

 	WARN_ON(preemptible() && num_online_cpus() > 1);
 	id = x | __get_cpu_var(x2apic_extra_bits);

 	return id;
 }

 static unsigned long set_apic_id(unsigned int id)
 {
 	unsigned long x;

 	/* maskout x2apic_extra_bits ? */
 	x = id;
 	return x;
 }

 static unsigned int uv_read_apic_id(void)
 {

 	return get_apic_id(apic_read(APIC_ID));
 }

 static unsigned int phys_pkg_id(int index_msb)
 {
 	return uv_read_apic_id() >> index_msb;
 }

 static void uv_send_IPI_self(int vector)
 {
 	apic_write(APIC_SELF_IPI, vector);
 }

 struct genapic apic_x2apic_uv_x = {
 	.name = "UV large system",
 	.acpi_madt_oem_check = uv_acpi_madt_oem_check,
 	.int_delivery_mode = dest_Fixed,
 	.int_dest_mode = (APIC_DEST_PHYSICAL != 0),
 	.target_cpus = uv_target_cpus,
 	.vector_allocation_domain = uv_vector_allocation_domain,
 	.apic_id_registered = uv_apic_id_registered,
 	.init_apic_ldr = uv_init_apic_ldr,
 	.send_IPI_all = uv_send_IPI_all,
 	.send_IPI_allbutself = uv_send_IPI_allbutself,
 	.send_IPI_mask = uv_send_IPI_mask,
 	.send_IPI_self = uv_send_IPI_self,
 	.cpu_mask_to_apicid = uv_cpu_mask_to_apicid,
 	.phys_pkg_id = phys_pkg_id,
 	.get_apic_id = get_apic_id,
 	.set_apic_id = set_apic_id,
 	.apic_id_mask = (0xFFFFFFFFu),
 };

 static __cpuinit void set_x2apic_extra_bits(int pnode)
 {
 	__get_cpu_var(x2apic_extra_bits) = (pnode << 6);
 }

 /*
  * Called on boot cpu.
  */
 static __init int boot_pnode_to_blade(int pnode)
 {
 	int blade;

 	for (blade = 0; blade < uv_num_possible_blades(); blade++)
 		if (pnode == uv_blade_info[blade].pnode)
 			return blade;
 	BUG();
 }

 struct redir_addr {
 	unsigned long redirect;
 	unsigned long alias;
 };

 #define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT

 static __initdata struct redir_addr redir_addrs[] = {
 	{UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_SI_ALIAS0_OVERLAY_CONFIG},
 	{UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_SI_ALIAS1_OVERLAY_CONFIG},
 	{UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_SI_ALIAS2_OVERLAY_CONFIG},
 };

 static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
 {
 	union uvh_si_alias0_overlay_config_u alias;
 	union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect;
 	int i;

 	for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) {
 		alias.v = uv_read_local_mmr(redir_addrs[i].alias);
 		if (alias.s.base == 0) {
 			*size = (1UL << alias.s.m_alias);
 			redirect.v = uv_read_local_mmr(redir_addrs[i].redirect);
 			*base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
 			return;
 		}
 	}
 	BUG();
 }

 static __init void map_low_mmrs(void)
 {
 	init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE);
 	init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE);
 }

 enum map_type {map_wb, map_uc};

 static __init void map_high(char *id, unsigned long base, int shift,
 			    int max_pnode, enum map_type map_type)
 {
 	unsigned long bytes, paddr;

 	paddr = base << shift;
 	bytes = (1UL << shift) * (max_pnode + 1);
 	printk(KERN_INFO "UV: Map %s_HI 0x%lx - 0x%lx\n", id, paddr,
 	       					paddr + bytes);
 	if (map_type == map_uc)
 		init_extra_mapping_uc(paddr, bytes);
 	else
 		init_extra_mapping_wb(paddr, bytes);

 }
 static __init void map_gru_high(int max_pnode)
 {
 	union uvh_rh_gam_gru_overlay_config_mmr_u gru;
 	int shift = UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_SHFT;

 	gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR);
 	if (gru.s.enable)
 		map_high("GRU", gru.s.base, shift, max_pnode, map_wb);
 }

 static __init void map_config_high(int max_pnode)
 {
 	union uvh_rh_gam_cfg_overlay_config_mmr_u cfg;
 	int shift = UVH_RH_GAM_CFG_OVERLAY_CONFIG_MMR_BASE_SHFT;

 	cfg.v = uv_read_local_mmr(UVH_RH_GAM_CFG_OVERLAY_CONFIG_MMR);
 	if (cfg.s.enable)
 		map_high("CONFIG", cfg.s.base, shift, max_pnode, map_uc);
 }

 static __init void map_mmr_high(int max_pnode)
 {
 	union uvh_rh_gam_mmr_overlay_config_mmr_u mmr;
 	int shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR_BASE_SHFT;

 	mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR);
 	if (mmr.s.enable)
 		map_high("MMR", mmr.s.base, shift, max_pnode, map_uc);
 }

 static __init void map_mmioh_high(int max_pnode)
 {
 	union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh;
 	int shift = UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT;

 	mmioh.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR);
 	if (mmioh.s.enable)
 		map_high("MMIOH", mmioh.s.base, shift, max_pnode, map_uc);
 }

 static __init void uv_rtc_init(void)
 {
 	long status, ticks_per_sec, drift;

 	status =
 	    x86_bios_freq_base(BIOS_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");
 		/* BIOS gives wrong value for clock freq. so guess */
 		sn_rtc_cycles_per_second = 1000000000000UL / 30000UL;
 	} else
 		sn_rtc_cycles_per_second = ticks_per_sec;
 }

 /*
  * Called on each cpu to initialize the per_cpu UV data area.
  * 	ZZZ hotplug not supported yet
  */
 void __cpuinit uv_cpu_init(void)
 {
 	/* CPU 0 initilization will be done via uv_system_init. */
 	if (!uv_blade_info)
 		return;

 	uv_blade_info[uv_numa_blade_id()].nr_online_cpus++;

 	if (get_uv_system_type() == UV_NON_UNIQUE_APIC)
 		set_x2apic_extra_bits(uv_hub_info->pnode);
 }


 void __init uv_system_init(void)
 {
 	union uvh_si_addr_map_config_u m_n_config;
 	union uvh_node_id_u node_id;
 	unsigned long gnode_upper, lowmem_redir_base, lowmem_redir_size;
 	int bytes, nid, cpu, lcpu, pnode, blade, i, j, m_val, n_val;
 	int max_pnode = 0;
 	unsigned long mmr_base, present;

 	map_low_mmrs();

 	m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);
 	m_val = m_n_config.s.m_skt;
 	n_val = m_n_config.s.n_skt;
 	mmr_base =
 	    uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
 	    ~UV_MMR_ENABLE;
 	printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);

 	for(i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++)
 		uv_possible_blades +=
 		  hweight64(uv_read_local_mmr( UVH_NODE_PRESENT_TABLE + i * 8));
 	printk(KERN_DEBUG "UV: Found %d blades\n", uv_num_possible_blades());

 	bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
 	uv_blade_info = alloc_bootmem_pages(bytes);

 	get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);

 	bytes = sizeof(uv_node_to_blade[0]) * num_possible_nodes();
 	uv_node_to_blade = alloc_bootmem_pages(bytes);
 	memset(uv_node_to_blade, 255, bytes);

 	bytes = sizeof(uv_cpu_to_blade[0]) * num_possible_cpus();
 	uv_cpu_to_blade = alloc_bootmem_pages(bytes);
 	memset(uv_cpu_to_blade, 255, bytes);

 	blade = 0;
 	for (i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) {
 		present = uv_read_local_mmr(UVH_NODE_PRESENT_TABLE + i * 8);
 		for (j = 0; j < 64; j++) {
 			if (!test_bit(j, &present))
 				continue;
 			uv_blade_info[blade].pnode = (i * 64 + j);
 			uv_blade_info[blade].nr_possible_cpus = 0;
 			uv_blade_info[blade].nr_online_cpus = 0;
 			blade++;
 		}
 	}

 	node_id.v = uv_read_local_mmr(UVH_NODE_ID);
 	gnode_upper = (((unsigned long)node_id.s.node_id) &
 		       ~((1 << n_val) - 1)) << m_val;

 	uv_rtc_init();

 	for_each_present_cpu(cpu) {
 		nid = cpu_to_node(cpu);
 		pnode = uv_apicid_to_pnode(per_cpu(x86_cpu_to_apicid, cpu));
 		blade = boot_pnode_to_blade(pnode);
 		lcpu = uv_blade_info[blade].nr_possible_cpus;
 		uv_blade_info[blade].nr_possible_cpus++;

 		uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
 		uv_cpu_hub_info(cpu)->lowmem_remap_top =
 					lowmem_redir_base + lowmem_redir_size;
 		uv_cpu_hub_info(cpu)->m_val = m_val;
 		uv_cpu_hub_info(cpu)->n_val = m_val;
 		uv_cpu_hub_info(cpu)->numa_blade_id = blade;
 		uv_cpu_hub_info(cpu)->blade_processor_id = lcpu;
 		uv_cpu_hub_info(cpu)->pnode = pnode;
 		uv_cpu_hub_info(cpu)->pnode_mask = (1 << n_val) - 1;
 		uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1;
 		uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
 		uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
 		uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */
 		uv_node_to_blade[nid] = blade;
 		uv_cpu_to_blade[cpu] = blade;
 		max_pnode = max(pnode, max_pnode);

 		printk(KERN_DEBUG "UV: cpu %d, apicid 0x%x, pnode %d, nid %d, "
 			"lcpu %d, blade %d\n",
 			cpu, per_cpu(x86_cpu_to_apicid, cpu), pnode, nid,
 			lcpu, blade);
 	}

 	map_gru_high(max_pnode);
 	map_mmr_high(max_pnode);
 	map_config_high(max_pnode);
 	map_mmioh_high(max_pnode);

 	uv_cpu_init();
 }
	/*
	* 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.
	*
	* SGI UV APIC functions (note: not an Intel compatible APIC)
	*
	* Copyright (C) 2007-2008 Silicon Graphics, Inc. All rights reserved.
	*/

	#include <linux/kernel.h>
	#include <linux/threads.h>
	#include <linux/cpumask.h>
	#include <linux/string.h>
	#include <linux/ctype.h>
	#include <linux/init.h>
	#include <linux/sched.h>
	#include <linux/bootmem.h>
	#include <linux/module.h>
	#include <linux/hardirq.h>
	#include <asm/smp.h>
	#include <asm/ipi.h>
	#include <asm/genapic.h>
	#include <asm/pgtable.h>
	#include <asm/uv/uv_mmrs.h>
	#include <asm/uv/uv_hub.h>
	#include <asm/uv/bios.h>

	DEFINE_PER_CPU(int, x2apic_extra_bits);

	static enum uv_system_type uv_system_type;

	static int __init uv_acpi_madt_oem_check(char oem_id, char oem_table_id)
	{
	if (!strcmp(oem_id, "SGI")) {
	if (!strcmp(oem_table_id, "UVL"))
	uv_system_type = UV_LEGACY_APIC;
	else if (!strcmp(oem_table_id, "UVX"))
	uv_system_type = UV_X2APIC;
	else if (!strcmp(oem_table_id, "UVH")) {
	uv_system_type = UV_NON_UNIQUE_APIC;
	return 1;
	}
	}
	return 0;
	}

	enum uv_system_type get_uv_system_type(void)
	{
	return uv_system_type;
	}

	int is_uv_system(void)
	{
	return uv_system_type != UV_NONE;
	}
	EXPORT_SYMBOL_GPL(is_uv_system);

	DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
	EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);

	struct uv_blade_info *uv_blade_info;
	EXPORT_SYMBOL_GPL(uv_blade_info);

	short *uv_node_to_blade;
	EXPORT_SYMBOL_GPL(uv_node_to_blade);

	short *uv_cpu_to_blade;
	EXPORT_SYMBOL_GPL(uv_cpu_to_blade);

	short uv_possible_blades;
	EXPORT_SYMBOL_GPL(uv_possible_blades);

	unsigned long sn_rtc_cycles_per_second;
	EXPORT_SYMBOL(sn_rtc_cycles_per_second);

	/* Start with all IRQs pointing to boot CPU. IRQ balancing will shift them. */

	static cpumask_t uv_target_cpus(void)
	{
	return cpumask_of_cpu(0);
	}

	static cpumask_t uv_vector_allocation_domain(int cpu)
	{
	cpumask_t domain = CPU_MASK_NONE;
	cpu_set(cpu, domain);
	return domain;
	}

	int uv_wakeup_secondary(int phys_apicid, unsigned int start_rip)
	{
	unsigned long val;
	int pnode;

	pnode = uv_apicid_to_pnode(phys_apicid);
	val = (1UL << UVH_IPI_INT_SEND_SHFT) \|
	(phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) \|
	(((long)start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) \|
	APIC_DM_INIT;
	uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
	mdelay(10);

	val = (1UL << UVH_IPI_INT_SEND_SHFT) \|
	(phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) \|
	(((long)start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) \|
	APIC_DM_STARTUP;
	uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
	return 0;
	}

	static void uv_send_IPI_one(int cpu, int vector)
	{
	unsigned long val, apicid, lapicid;
	int pnode;

	apicid = per_cpu(x86_cpu_to_apicid, cpu);
	lapicid = apicid & 0x3f; /* ZZZ macro needed */
	pnode = uv_apicid_to_pnode(apicid);
	val =
	(1UL << UVH_IPI_INT_SEND_SHFT) \| (lapicid <<
	UVH_IPI_INT_APIC_ID_SHFT) \|
	(vector << UVH_IPI_INT_VECTOR_SHFT);
	uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
	}

	static void uv_send_IPI_mask(cpumask_t mask, int vector)
	{
	unsigned int cpu;

	for_each_possible_cpu(cpu)
	if (cpu_isset(cpu, mask))
	uv_send_IPI_one(cpu, vector);
	}

	static void uv_send_IPI_allbutself(int vector)
	{
	cpumask_t mask = cpu_online_map;

	cpu_clear(smp_processor_id(), mask);

	if (!cpus_empty(mask))
	uv_send_IPI_mask(mask, vector);
	}

	static void uv_send_IPI_all(int vector)
	{
	uv_send_IPI_mask(cpu_online_map, vector);
	}

	static int uv_apic_id_registered(void)
	{
	return 1;
	}

	static void uv_init_apic_ldr(void)
	{
	}

	static unsigned int uv_cpu_mask_to_apicid(cpumask_t cpumask)
	{
	int cpu;

	/*
	* We're using fixed IRQ delivery, can only return one phys APIC ID.
	* May as well be the first.
	*/
	cpu = first_cpu(cpumask);
	if ((unsigned)cpu < nr_cpu_ids)
	return per_cpu(x86_cpu_to_apicid, cpu);
	else
	return BAD_APICID;
	}

	static unsigned int get_apic_id(unsigned long x)
	{
	unsigned int id;

	WARN_ON(preemptible() && num_online_cpus() > 1);
	id = x \| __get_cpu_var(x2apic_extra_bits);

	return id;
	}

	static unsigned long set_apic_id(unsigned int id)
	{
	unsigned long x;

	/* maskout x2apic_extra_bits ? */
	x = id;
	return x;
	}

	static unsigned int uv_read_apic_id(void)
	{

	return get_apic_id(apic_read(APIC_ID));
	}

	static unsigned int phys_pkg_id(int index_msb)
	{
	return uv_read_apic_id() >> index_msb;
	}

	static void uv_send_IPI_self(int vector)
	{
	apic_write(APIC_SELF_IPI, vector);
	}

	struct genapic apic_x2apic_uv_x = {
	.name = "UV large system",
	.acpi_madt_oem_check = uv_acpi_madt_oem_check,
	.int_delivery_mode = dest_Fixed,
	.int_dest_mode = (APIC_DEST_PHYSICAL != 0),
	.target_cpus = uv_target_cpus,
	.vector_allocation_domain = uv_vector_allocation_domain,
	.apic_id_registered = uv_apic_id_registered,
	.init_apic_ldr = uv_init_apic_ldr,
	.send_IPI_all = uv_send_IPI_all,
	.send_IPI_allbutself = uv_send_IPI_allbutself,
	.send_IPI_mask = uv_send_IPI_mask,
	.send_IPI_self = uv_send_IPI_self,
	.cpu_mask_to_apicid = uv_cpu_mask_to_apicid,
	.phys_pkg_id = phys_pkg_id,
	.get_apic_id = get_apic_id,
	.set_apic_id = set_apic_id,
	.apic_id_mask = (0xFFFFFFFFu),
	};

	static __cpuinit void set_x2apic_extra_bits(int pnode)
	{
	__get_cpu_var(x2apic_extra_bits) = (pnode << 6);
	}

	/*
	* Called on boot cpu.
	*/
	static __init int boot_pnode_to_blade(int pnode)
	{
	int blade;

	for (blade = 0; blade < uv_num_possible_blades(); blade++)
	if (pnode == uv_blade_info[blade].pnode)
	return blade;
	BUG();
	}

	struct redir_addr {
	unsigned long redirect;
	unsigned long alias;
	};

	#define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT

	static __initdata struct redir_addr redir_addrs[] = {
	{UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_SI_ALIAS0_OVERLAY_CONFIG},
	{UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_SI_ALIAS1_OVERLAY_CONFIG},
	{UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_SI_ALIAS2_OVERLAY_CONFIG},
	};

	static __init void get_lowmem_redirect(unsigned long base, unsigned long size)
	{
	union uvh_si_alias0_overlay_config_u alias;
	union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect;
	int i;

	for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) {
	alias.v = uv_read_local_mmr(redir_addrs[i].alias);
	if (alias.s.base == 0) {
	*size = (1UL << alias.s.m_alias);
	redirect.v = uv_read_local_mmr(redir_addrs[i].redirect);
	*base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
	return;
	}
	}
	BUG();
	}

	static __init void map_low_mmrs(void)
	{
	init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE);
	init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE);
	}

	enum map_type {map_wb, map_uc};

	static __init void map_high(char *id, unsigned long base, int shift,
	int max_pnode, enum map_type map_type)
	{
	unsigned long bytes, paddr;

	paddr = base << shift;
	bytes = (1UL << shift) * (max_pnode + 1);
	printk(KERN_INFO "UV: Map %s_HI 0x%lx - 0x%lx\n", id, paddr,
	paddr + bytes);
	if (map_type == map_uc)
	init_extra_mapping_uc(paddr, bytes);
	else
	init_extra_mapping_wb(paddr, bytes);

	}
	static __init void map_gru_high(int max_pnode)
	{
	union uvh_rh_gam_gru_overlay_config_mmr_u gru;
	int shift = UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_SHFT;

	gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR);
	if (gru.s.enable)
	map_high("GRU", gru.s.base, shift, max_pnode, map_wb);
	}

	static __init void map_config_high(int max_pnode)
	{
	union uvh_rh_gam_cfg_overlay_config_mmr_u cfg;
	int shift = UVH_RH_GAM_CFG_OVERLAY_CONFIG_MMR_BASE_SHFT;

	cfg.v = uv_read_local_mmr(UVH_RH_GAM_CFG_OVERLAY_CONFIG_MMR);
	if (cfg.s.enable)
	map_high("CONFIG", cfg.s.base, shift, max_pnode, map_uc);
	}

	static __init void map_mmr_high(int max_pnode)
	{
	union uvh_rh_gam_mmr_overlay_config_mmr_u mmr;
	int shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR_BASE_SHFT;

	mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR);
	if (mmr.s.enable)
	map_high("MMR", mmr.s.base, shift, max_pnode, map_uc);
	}

	static __init void map_mmioh_high(int max_pnode)
	{
	union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh;
	int shift = UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT;

	mmioh.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR);
	if (mmioh.s.enable)
	map_high("MMIOH", mmioh.s.base, shift, max_pnode, map_uc);
	}

	static __init void uv_rtc_init(void)
	{
	long status, ticks_per_sec, drift;

	status =
	x86_bios_freq_base(BIOS_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");
	/* BIOS gives wrong value for clock freq. so guess */
	sn_rtc_cycles_per_second = 1000000000000UL / 30000UL;
	} else
	sn_rtc_cycles_per_second = ticks_per_sec;
	}

	/*
	* Called on each cpu to initialize the per_cpu UV data area.
	* ZZZ hotplug not supported yet
	*/
	void __cpuinit uv_cpu_init(void)
	{
	/* CPU 0 initilization will be done via uv_system_init. */
	if (!uv_blade_info)
	return;

	uv_blade_info[uv_numa_blade_id()].nr_online_cpus++;

	if (get_uv_system_type() == UV_NON_UNIQUE_APIC)
	set_x2apic_extra_bits(uv_hub_info->pnode);
	}


	void __init uv_system_init(void)
	{
	union uvh_si_addr_map_config_u m_n_config;
	union uvh_node_id_u node_id;
	unsigned long gnode_upper, lowmem_redir_base, lowmem_redir_size;
	int bytes, nid, cpu, lcpu, pnode, blade, i, j, m_val, n_val;
	int max_pnode = 0;
	unsigned long mmr_base, present;

	map_low_mmrs();

	m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);
	m_val = m_n_config.s.m_skt;
	n_val = m_n_config.s.n_skt;
	mmr_base =
	uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
	~UV_MMR_ENABLE;
	printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);

	for(i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++)
	uv_possible_blades +=
	hweight64(uv_read_local_mmr( UVH_NODE_PRESENT_TABLE + i * 8));
	printk(KERN_DEBUG "UV: Found %d blades\n", uv_num_possible_blades());

	bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
	uv_blade_info = alloc_bootmem_pages(bytes);

	get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);

	bytes = sizeof(uv_node_to_blade[0]) * num_possible_nodes();
	uv_node_to_blade = alloc_bootmem_pages(bytes);
	memset(uv_node_to_blade, 255, bytes);

	bytes = sizeof(uv_cpu_to_blade[0]) * num_possible_cpus();
	uv_cpu_to_blade = alloc_bootmem_pages(bytes);
	memset(uv_cpu_to_blade, 255, bytes);

	blade = 0;
	for (i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) {
	present = uv_read_local_mmr(UVH_NODE_PRESENT_TABLE + i * 8);
	for (j = 0; j < 64; j++) {
	if (!test_bit(j, &present))
	continue;
	uv_blade_info[blade].pnode = (i * 64 + j);
	uv_blade_info[blade].nr_possible_cpus = 0;
	uv_blade_info[blade].nr_online_cpus = 0;
	blade++;
	}
	}

	node_id.v = uv_read_local_mmr(UVH_NODE_ID);
	gnode_upper = (((unsigned long)node_id.s.node_id) &
	~((1 << n_val) - 1)) << m_val;

	uv_rtc_init();

	for_each_present_cpu(cpu) {
	nid = cpu_to_node(cpu);
	pnode = uv_apicid_to_pnode(per_cpu(x86_cpu_to_apicid, cpu));
	blade = boot_pnode_to_blade(pnode);
	lcpu = uv_blade_info[blade].nr_possible_cpus;
	uv_blade_info[blade].nr_possible_cpus++;

	uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
	uv_cpu_hub_info(cpu)->lowmem_remap_top =
	lowmem_redir_base + lowmem_redir_size;
	uv_cpu_hub_info(cpu)->m_val = m_val;
	uv_cpu_hub_info(cpu)->n_val = m_val;
	uv_cpu_hub_info(cpu)->numa_blade_id = blade;
	uv_cpu_hub_info(cpu)->blade_processor_id = lcpu;
	uv_cpu_hub_info(cpu)->pnode = pnode;
	uv_cpu_hub_info(cpu)->pnode_mask = (1 << n_val) - 1;
	uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1;
	uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
	uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
	uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */
	uv_node_to_blade[nid] = blade;
	uv_cpu_to_blade[cpu] = blade;
	max_pnode = max(pnode, max_pnode);

	printk(KERN_DEBUG "UV: cpu %d, apicid 0x%x, pnode %d, nid %d, "
	"lcpu %d, blade %d\n",
	cpu, per_cpu(x86_cpu_to_apicid, cpu), pnode, nid,
	lcpu, blade);
	}

	map_gru_high(max_pnode);
	map_mmr_high(max_pnode);
	map_config_high(max_pnode);
	map_mmioh_high(max_pnode);

	uv_cpu_init();
	}