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diff --git a/arch/x86/kernel/apic/es7000_32.c b/arch/x86/kernel/apic/es7000_32.c
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+/*
+ * Written by: Garry Forsgren, Unisys Corporation
+ * Natalie Protasevich, Unisys Corporation
+ *
+ * This file contains the code to configure and interface
+ * with Unisys ES7000 series hardware system manager.
+ *
+ * Copyright (c) 2003 Unisys Corporation.
+ * Copyright (C) 2009, Red Hat, Inc., Ingo Molnar
+ *
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Unisys Corporation, Township Line & Union Meeting
+ * Roads-A, Unisys Way, Blue Bell, Pennsylvania, 19424, or:
+ *
+ * http://www.unisys.com
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/notifier.h>
+#include <linux/spinlock.h>
+#include <linux/cpumask.h>
+#include <linux/threads.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/reboot.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/acpi.h>
+#include <linux/init.h>
+#include <linux/gfp.h>
+#include <linux/nmi.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+
+#include <asm/apicdef.h>
+#include <linux/atomic.h>
+#include <asm/fixmap.h>
+#include <asm/mpspec.h>
+#include <asm/setup.h>
+#include <asm/apic.h>
+#include <asm/ipi.h>
+
+/*
+ * ES7000 chipsets
+ */
+
+#define NON_UNISYS 0
+#define ES7000_CLASSIC 1
+#define ES7000_ZORRO 2
+
+#define MIP_REG 1
+#define MIP_PSAI_REG 4
+
+#define MIP_BUSY 1
+#define MIP_SPIN 0xf0000
+#define MIP_VALID 0x0100000000000000ULL
+#define MIP_SW_APIC 0x1020b
+
+#define MIP_PORT(val) ((val >> 32) & 0xffff)
+
+#define MIP_RD_LO(val) (val & 0xffffffff)
+
+struct mip_reg {
+ unsigned long long off_0x00;
+ unsigned long long off_0x08;
+ unsigned long long off_0x10;
+ unsigned long long off_0x18;
+ unsigned long long off_0x20;
+ unsigned long long off_0x28;
+ unsigned long long off_0x30;
+ unsigned long long off_0x38;
+};
+
+struct mip_reg_info {
+ unsigned long long mip_info;
+ unsigned long long delivery_info;
+ unsigned long long host_reg;
+ unsigned long long mip_reg;
+};
+
+struct psai {
+ unsigned long long entry_type;
+ unsigned long long addr;
+ unsigned long long bep_addr;
+};
+
+#ifdef CONFIG_ACPI
+
+struct es7000_oem_table {
+ struct acpi_table_header Header;
+ u32 OEMTableAddr;
+ u32 OEMTableSize;
+};
+
+static unsigned long oem_addrX;
+static unsigned long oem_size;
+
+#endif
+
+/*
+ * ES7000 Globals
+ */
+
+static volatile unsigned long *psai;
+static struct mip_reg *mip_reg;
+static struct mip_reg *host_reg;
+static int mip_port;
+static unsigned long mip_addr;
+static unsigned long host_addr;
+
+int es7000_plat;
+
+/*
+ * GSI override for ES7000 platforms.
+ */
+
+
+static int __cpuinit wakeup_secondary_cpu_via_mip(int cpu, unsigned long eip)
+{
+ unsigned long vect = 0, psaival = 0;
+
+ if (psai == NULL)
+ return -1;
+
+ vect = ((unsigned long)__pa(eip)/0x1000) << 16;
+ psaival = (0x1000000 | vect | cpu);
+
+ while (*psai & 0x1000000)
+ ;
+
+ *psai = psaival;
+
+ return 0;
+}
+
+static int es7000_apic_is_cluster(void)
+{
+ /* MPENTIUMIII */
+ if (boot_cpu_data.x86 == 6 &&
+ (boot_cpu_data.x86_model >= 7 && boot_cpu_data.x86_model <= 11))
+ return 1;
+
+ return 0;
+}
+
+static void setup_unisys(void)
+{
+ /*
+ * Determine the generation of the ES7000 currently running.
+ *
+ * es7000_plat = 1 if the machine is a 5xx ES7000 box
+ * es7000_plat = 2 if the machine is a x86_64 ES7000 box
+ *
+ */
+ if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2))
+ es7000_plat = ES7000_ZORRO;
+ else
+ es7000_plat = ES7000_CLASSIC;
+}
+
+/*
+ * Parse the OEM Table:
+ */
+static int parse_unisys_oem(char *oemptr)
+{
+ int i;
+ int success = 0;
+ unsigned char type, size;
+ unsigned long val;
+ char *tp = NULL;
+ struct psai *psaip = NULL;
+ struct mip_reg_info *mi;
+ struct mip_reg *host, *mip;
+
+ tp = oemptr;
+
+ tp += 8;
+
+ for (i = 0; i <= 6; i++) {
+ type = *tp++;
+ size = *tp++;
+ tp -= 2;
+ switch (type) {
+ case MIP_REG:
+ mi = (struct mip_reg_info *)tp;
+ val = MIP_RD_LO(mi->host_reg);
+ host_addr = val;
+ host = (struct mip_reg *)val;
+ host_reg = __va(host);
+ val = MIP_RD_LO(mi->mip_reg);
+ mip_port = MIP_PORT(mi->mip_info);
+ mip_addr = val;
+ mip = (struct mip_reg *)val;
+ mip_reg = __va(mip);
+ pr_debug("host_reg = 0x%lx\n",
+ (unsigned long)host_reg);
+ pr_debug("mip_reg = 0x%lx\n",
+ (unsigned long)mip_reg);
+ success++;
+ break;
+ case MIP_PSAI_REG:
+ psaip = (struct psai *)tp;
+ if (tp != NULL) {
+ if (psaip->addr)
+ psai = __va(psaip->addr);
+ else
+ psai = NULL;
+ success++;
+ }
+ break;
+ default:
+ break;
+ }
+ tp += size;
+ }
+
+ if (success < 2)
+ es7000_plat = NON_UNISYS;
+ else
+ setup_unisys();
+
+ return es7000_plat;
+}
+
+#ifdef CONFIG_ACPI
+static int __init find_unisys_acpi_oem_table(unsigned long *oem_addr)
+{
+ struct acpi_table_header *header = NULL;
+ struct es7000_oem_table *table;
+ acpi_size tbl_size;
+ acpi_status ret;
+ int i = 0;
+
+ for (;;) {
+ ret = acpi_get_table_with_size("OEM1", i++, &header, &tbl_size);
+ if (!ACPI_SUCCESS(ret))
+ return -1;
+
+ if (!memcmp((char *) &header->oem_id, "UNISYS", 6))
+ break;
+
+ early_acpi_os_unmap_memory(header, tbl_size);
+ }
+
+ table = (void *)header;
+
+ oem_addrX = table->OEMTableAddr;
+ oem_size = table->OEMTableSize;
+
+ early_acpi_os_unmap_memory(header, tbl_size);
+
+ *oem_addr = (unsigned long)__acpi_map_table(oem_addrX, oem_size);
+
+ return 0;
+}
+
+static void __init unmap_unisys_acpi_oem_table(unsigned long oem_addr)
+{
+ if (!oem_addr)
+ return;
+
+ __acpi_unmap_table((char *)oem_addr, oem_size);
+}
+
+static int es7000_check_dsdt(void)
+{
+ struct acpi_table_header header;
+
+ if (ACPI_SUCCESS(acpi_get_table_header(ACPI_SIG_DSDT, 0, &header)) &&
+ !strncmp(header.oem_id, "UNISYS", 6))
+ return 1;
+ return 0;
+}
+
+static int es7000_acpi_ret;
+
+/* Hook from generic ACPI tables.c */
+static int __init es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
+{
+ unsigned long oem_addr = 0;
+ int check_dsdt;
+ int ret = 0;
+
+ /* check dsdt at first to avoid clear fix_map for oem_addr */
+ check_dsdt = es7000_check_dsdt();
+
+ if (!find_unisys_acpi_oem_table(&oem_addr)) {
+ if (check_dsdt) {
+ ret = parse_unisys_oem((char *)oem_addr);
+ } else {
+ setup_unisys();
+ ret = 1;
+ }
+ /*
+ * we need to unmap it
+ */
+ unmap_unisys_acpi_oem_table(oem_addr);
+ }
+
+ es7000_acpi_ret = ret;
+
+ return ret && !es7000_apic_is_cluster();
+}
+
+static int es7000_acpi_madt_oem_check_cluster(char *oem_id, char *oem_table_id)
+{
+ int ret = es7000_acpi_ret;
+
+ return ret && es7000_apic_is_cluster();
+}
+
+#else /* !CONFIG_ACPI: */
+static int es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
+{
+ return 0;
+}
+
+static int es7000_acpi_madt_oem_check_cluster(char *oem_id, char *oem_table_id)
+{
+ return 0;
+}
+#endif /* !CONFIG_ACPI */
+
+static void es7000_spin(int n)
+{
+ int i = 0;
+
+ while (i++ < n)
+ rep_nop();
+}
+
+static int es7000_mip_write(struct mip_reg *mip_reg)
+{
+ int status = 0;
+ int spin;
+
+ spin = MIP_SPIN;
+ while ((host_reg->off_0x38 & MIP_VALID) != 0) {
+ if (--spin <= 0) {
+ WARN(1, "Timeout waiting for Host Valid Flag\n");
+ return -1;
+ }
+ es7000_spin(MIP_SPIN);
+ }
+
+ memcpy(host_reg, mip_reg, sizeof(struct mip_reg));
+ outb(1, mip_port);
+
+ spin = MIP_SPIN;
+
+ while ((mip_reg->off_0x38 & MIP_VALID) == 0) {
+ if (--spin <= 0) {
+ WARN(1, "Timeout waiting for MIP Valid Flag\n");
+ return -1;
+ }
+ es7000_spin(MIP_SPIN);
+ }
+
+ status = (mip_reg->off_0x00 & 0xffff0000000000ULL) >> 48;
+ mip_reg->off_0x38 &= ~MIP_VALID;
+
+ return status;
+}
+
+static void es7000_enable_apic_mode(void)
+{
+ struct mip_reg es7000_mip_reg;
+ int mip_status;
+
+ if (!es7000_plat)
+ return;
+
+ pr_info("Enabling APIC mode.\n");
+ memset(&es7000_mip_reg, 0, sizeof(struct mip_reg));
+ es7000_mip_reg.off_0x00 = MIP_SW_APIC;
+ es7000_mip_reg.off_0x38 = MIP_VALID;
+
+ while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0)
+ WARN(1, "Command failed, status = %x\n", mip_status);
+}
+
+static void es7000_vector_allocation_domain(int cpu, struct cpumask *retmask)
+{
+ /* Careful. Some cpus do not strictly honor the set of cpus
+ * specified in the interrupt destination when using lowest
+ * priority interrupt delivery mode.
+ *
+ * In particular there was a hyperthreading cpu observed to
+ * deliver interrupts to the wrong hyperthread when only one
+ * hyperthread was specified in the interrupt desitination.
+ */
+ cpumask_clear(retmask);
+ cpumask_bits(retmask)[0] = APIC_ALL_CPUS;
+}
+
+
+static void es7000_wait_for_init_deassert(atomic_t *deassert)
+{
+ while (!atomic_read(deassert))
+ cpu_relax();
+}
+
+static unsigned int es7000_get_apic_id(unsigned long x)
+{
+ return (x >> 24) & 0xFF;
+}
+
+static void es7000_send_IPI_mask(const struct cpumask *mask, int vector)
+{
+ default_send_IPI_mask_sequence_phys(mask, vector);
+}
+
+static void es7000_send_IPI_allbutself(int vector)
+{
+ default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
+}
+
+static void es7000_send_IPI_all(int vector)
+{
+ es7000_send_IPI_mask(cpu_online_mask, vector);
+}
+
+static int es7000_apic_id_registered(void)
+{
+ return 1;
+}
+
+static const struct cpumask *target_cpus_cluster(void)
+{
+ return cpu_all_mask;
+}
+
+static const struct cpumask *es7000_target_cpus(void)
+{
+ return cpumask_of(smp_processor_id());
+}
+
+static unsigned long es7000_check_apicid_used(physid_mask_t *map, int apicid)
+{
+ return 0;
+}
+
+static unsigned long es7000_check_apicid_present(int bit)
+{
+ return physid_isset(bit, phys_cpu_present_map);
+}
+
+static int es7000_early_logical_apicid(int cpu)
+{
+ /* on es7000, logical apicid is the same as physical */
+ return early_per_cpu(x86_bios_cpu_apicid, cpu);
+}
+
+static unsigned long calculate_ldr(int cpu)
+{
+ unsigned long id = per_cpu(x86_bios_cpu_apicid, cpu);
+
+ return SET_APIC_LOGICAL_ID(id);
+}
+
+/*
+ * Set up the logical destination ID.
+ *
+ * Intel recommends to set DFR, LdR and TPR before enabling
+ * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel
+ * document number 292116). So here it goes...
+ */
+static void es7000_init_apic_ldr_cluster(void)
+{
+ unsigned long val;
+ int cpu = smp_processor_id();
+
+ apic_write(APIC_DFR, APIC_DFR_CLUSTER);
+ val = calculate_ldr(cpu);
+ apic_write(APIC_LDR, val);
+}
+
+static void es7000_init_apic_ldr(void)
+{
+ unsigned long val;
+ int cpu = smp_processor_id();
+
+ apic_write(APIC_DFR, APIC_DFR_FLAT);
+ val = calculate_ldr(cpu);
+ apic_write(APIC_LDR, val);
+}
+
+static void es7000_setup_apic_routing(void)
+{
+ int apic = per_cpu(x86_bios_cpu_apicid, smp_processor_id());
+
+ pr_info("Enabling APIC mode: %s. Using %d I/O APICs, target cpus %lx\n",
+ (apic_version[apic] == 0x14) ?
+ "Physical Cluster" : "Logical Cluster",
+ nr_ioapics, cpumask_bits(es7000_target_cpus())[0]);
+}
+
+static int es7000_cpu_present_to_apicid(int mps_cpu)
+{
+ if (!mps_cpu)
+ return boot_cpu_physical_apicid;
+ else if (mps_cpu < nr_cpu_ids)
+ return per_cpu(x86_bios_cpu_apicid, mps_cpu);
+ else
+ return BAD_APICID;
+}
+
+static int cpu_id;
+
+static void es7000_apicid_to_cpu_present(int phys_apicid, physid_mask_t *retmap)
+{
+ physid_set_mask_of_physid(cpu_id, retmap);
+ ++cpu_id;
+}
+
+static void es7000_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
+{
+ /* For clustered we don't have a good way to do this yet - hack */
+ physids_promote(0xFFL, retmap);
+}
+
+static int es7000_check_phys_apicid_present(int cpu_physical_apicid)
+{
+ boot_cpu_physical_apicid = read_apic_id();
+ return 1;
+}
+
+static unsigned int es7000_cpu_mask_to_apicid(const struct cpumask *cpumask)
+{
+ unsigned int round = 0;
+ int cpu, uninitialized_var(apicid);
+
+ /*
+ * The cpus in the mask must all be on the apic cluster.
+ */
+ for_each_cpu(cpu, cpumask) {
+ int new_apicid = early_per_cpu(x86_cpu_to_logical_apicid, cpu);
+
+ if (round && APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) {
+ WARN(1, "Not a valid mask!");
+
+ return BAD_APICID;
+ }
+ apicid = new_apicid;
+ round++;
+ }
+ return apicid;
+}
+
+static unsigned int
+es7000_cpu_mask_to_apicid_and(const struct cpumask *inmask,
+ const struct cpumask *andmask)
+{
+ int apicid = early_per_cpu(x86_cpu_to_logical_apicid, 0);
+ cpumask_var_t cpumask;
+
+ if (!alloc_cpumask_var(&cpumask, GFP_ATOMIC))
+ return apicid;
+
+ cpumask_and(cpumask, inmask, andmask);
+ cpumask_and(cpumask, cpumask, cpu_online_mask);
+ apicid = es7000_cpu_mask_to_apicid(cpumask);
+
+ free_cpumask_var(cpumask);
+
+ return apicid;
+}
+
+static int es7000_phys_pkg_id(int cpuid_apic, int index_msb)
+{
+ return cpuid_apic >> index_msb;
+}
+
+static int probe_es7000(void)
+{
+ /* probed later in mptable/ACPI hooks */
+ return 0;
+}
+
+static int es7000_mps_ret;
+static int es7000_mps_oem_check(struct mpc_table *mpc, char *oem,
+ char *productid)
+{
+ int ret = 0;
+
+ if (mpc->oemptr) {
+ struct mpc_oemtable *oem_table =
+ (struct mpc_oemtable *)mpc->oemptr;
+
+ if (!strncmp(oem, "UNISYS", 6))
+ ret = parse_unisys_oem((char *)oem_table);
+ }
+
+ es7000_mps_ret = ret;
+
+ return ret && !es7000_apic_is_cluster();
+}
+
+static int es7000_mps_oem_check_cluster(struct mpc_table *mpc, char *oem,
+ char *productid)
+{
+ int ret = es7000_mps_ret;
+
+ return ret && es7000_apic_is_cluster();
+}
+
+/* We've been warned by a false positive warning.Use __refdata to keep calm. */
+static struct apic __refdata apic_es7000_cluster = {
+
+ .name = "es7000",
+ .probe = probe_es7000,
+ .acpi_madt_oem_check = es7000_acpi_madt_oem_check_cluster,
+ .apic_id_registered = es7000_apic_id_registered,
+
+ .irq_delivery_mode = dest_LowestPrio,
+ /* logical delivery broadcast to all procs: */
+ .irq_dest_mode = 1,
+
+ .target_cpus = target_cpus_cluster,
+ .disable_esr = 1,
+ .dest_logical = 0,
+ .check_apicid_used = es7000_check_apicid_used,
+ .check_apicid_present = es7000_check_apicid_present,
+
+ .vector_allocation_domain = es7000_vector_allocation_domain,
+ .init_apic_ldr = es7000_init_apic_ldr_cluster,
+
+ .ioapic_phys_id_map = es7000_ioapic_phys_id_map,
+ .setup_apic_routing = es7000_setup_apic_routing,
+ .multi_timer_check = NULL,
+ .cpu_present_to_apicid = es7000_cpu_present_to_apicid,
+ .apicid_to_cpu_present = es7000_apicid_to_cpu_present,
+ .setup_portio_remap = NULL,
+ .check_phys_apicid_present = es7000_check_phys_apicid_present,
+ .enable_apic_mode = es7000_enable_apic_mode,
+ .phys_pkg_id = es7000_phys_pkg_id,
+ .mps_oem_check = es7000_mps_oem_check_cluster,
+
+ .get_apic_id = es7000_get_apic_id,
+ .set_apic_id = NULL,
+ .apic_id_mask = 0xFF << 24,
+
+ .cpu_mask_to_apicid = es7000_cpu_mask_to_apicid,
+ .cpu_mask_to_apicid_and = es7000_cpu_mask_to_apicid_and,
+
+ .send_IPI_mask = es7000_send_IPI_mask,
+ .send_IPI_mask_allbutself = NULL,
+ .send_IPI_allbutself = es7000_send_IPI_allbutself,
+ .send_IPI_all = es7000_send_IPI_all,
+ .send_IPI_self = default_send_IPI_self,
+
+ .wakeup_secondary_cpu = wakeup_secondary_cpu_via_mip,
+
+ .trampoline_phys_low = 0x467,
+ .trampoline_phys_high = 0x469,
+
+ .wait_for_init_deassert = NULL,
+
+ /* Nothing to do for most platforms, since cleared by the INIT cycle: */
+ .smp_callin_clear_local_apic = NULL,
+ .inquire_remote_apic = default_inquire_remote_apic,
+
+ .read = native_apic_mem_read,
+ .write = native_apic_mem_write,
+ .icr_read = native_apic_icr_read,
+ .icr_write = native_apic_icr_write,
+ .wait_icr_idle = native_apic_wait_icr_idle,
+ .safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
+
+ .x86_32_early_logical_apicid = es7000_early_logical_apicid,
+};
+
+static struct apic __refdata apic_es7000 = {
+
+ .name = "es7000",
+ .probe = probe_es7000,
+ .acpi_madt_oem_check = es7000_acpi_madt_oem_check,
+ .apic_id_registered = es7000_apic_id_registered,
+
+ .irq_delivery_mode = dest_Fixed,
+ /* phys delivery to target CPUs: */
+ .irq_dest_mode = 0,
+
+ .target_cpus = es7000_target_cpus,
+ .disable_esr = 1,
+ .dest_logical = 0,
+ .check_apicid_used = es7000_check_apicid_used,
+ .check_apicid_present = es7000_check_apicid_present,
+
+ .vector_allocation_domain = es7000_vector_allocation_domain,
+ .init_apic_ldr = es7000_init_apic_ldr,
+
+ .ioapic_phys_id_map = es7000_ioapic_phys_id_map,
+ .setup_apic_routing = es7000_setup_apic_routing,
+ .multi_timer_check = NULL,
+ .cpu_present_to_apicid = es7000_cpu_present_to_apicid,
+ .apicid_to_cpu_present = es7000_apicid_to_cpu_present,
+ .setup_portio_remap = NULL,
+ .check_phys_apicid_present = es7000_check_phys_apicid_present,
+ .enable_apic_mode = es7000_enable_apic_mode,
+ .phys_pkg_id = es7000_phys_pkg_id,
+ .mps_oem_check = es7000_mps_oem_check,
+
+ .get_apic_id = es7000_get_apic_id,
+ .set_apic_id = NULL,
+ .apic_id_mask = 0xFF << 24,
+
+ .cpu_mask_to_apicid = es7000_cpu_mask_to_apicid,
+ .cpu_mask_to_apicid_and = es7000_cpu_mask_to_apicid_and,
+
+ .send_IPI_mask = es7000_send_IPI_mask,
+ .send_IPI_mask_allbutself = NULL,
+ .send_IPI_allbutself = es7000_send_IPI_allbutself,
+ .send_IPI_all = es7000_send_IPI_all,
+ .send_IPI_self = default_send_IPI_self,
+
+ .trampoline_phys_low = 0x467,
+ .trampoline_phys_high = 0x469,
+
+ .wait_for_init_deassert = es7000_wait_for_init_deassert,
+
+ /* Nothing to do for most platforms, since cleared by the INIT cycle: */
+ .smp_callin_clear_local_apic = NULL,
+ .inquire_remote_apic = default_inquire_remote_apic,
+
+ .read = native_apic_mem_read,
+ .write = native_apic_mem_write,
+ .icr_read = native_apic_icr_read,
+ .icr_write = native_apic_icr_write,
+ .wait_icr_idle = native_apic_wait_icr_idle,
+ .safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
+
+ .x86_32_early_logical_apicid = es7000_early_logical_apicid,
+};
+
+/*
+ * Need to check for es7000 followed by es7000_cluster, so this order
+ * in apic_drivers is important.
+ */
+apic_drivers(apic_es7000, apic_es7000_cluster);