1 files changed, 327 insertions, 0 deletions

diff --git a/arch/x86/mach-es7000/es7000plat.c b/arch/x86/mach-es7000/es7000plat.c
new file mode 100644
index 000000000000..ab99072d3f9a
--- /dev/null
+++ b/arch/x86/mach-es7000/es7000plat.c
@@ -0,0 +1,327 @@
+/*
+ * 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.  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
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/smp.h>
+#include <linux/string.h>
+#include <linux/spinlock.h>
+#include <linux/errno.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/acpi.h>
+#include <asm/io.h>
+#include <asm/nmi.h>
+#include <asm/smp.h>
+#include <asm/apicdef.h>
+#include "es7000.h"
+#include <mach_mpparse.h>
+
+/*
+ * ES7000 Globals
+ */
+
+volatile unsigned long  *psai = NULL;
+struct mip_reg          *mip_reg;
+struct mip_reg          *host_reg;
+int                     mip_port;
+unsigned long           mip_addr, host_addr;
+
+/*
+ * GSI override for ES7000 platforms.
+ */
+
+static unsigned int base;
+
+static int
+es7000_rename_gsi(int ioapic, int gsi)
+{
+        if (es7000_plat == ES7000_ZORRO)
+                return gsi;
+
+        if (!base) {
+                int i;
+                for (i = 0; i < nr_ioapics; i++)
+                        base += nr_ioapic_registers[i];
+        }
+
+        if (!ioapic && (gsi < 16)) 
+                gsi += base;
+        return gsi;
+}
+
+void __init
+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;
+        ioapic_renumber_irq = es7000_rename_gsi;
+}
+
+/*
+ * Parse the OEM Table
+ */
+
+int __init
+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);
+                        Dprintk("es7000_mipcfg: host_reg = 0x%lx \n",
+                                (unsigned long)host_reg);
+                        Dprintk("es7000_mipcfg: 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
+int __init
+find_unisys_acpi_oem_table(unsigned long *oem_addr)
+{
+        struct acpi_table_header *header = NULL;
+        int i = 0;
+        while (ACPI_SUCCESS(acpi_get_table("OEM1", i++, &header))) {
+                if (!memcmp((char *) &header->oem_id, "UNISYS", 6)) {
+                        struct oem_table *t = (struct oem_table *)header;
+                        *oem_addr = (unsigned long)__acpi_map_table(t->OEMTableAddr,
+                                                                    t->OEMTableSize);
+                        return 0;
+                }
+        }
+        return -1;
+}
+#endif
+
+/*
+ * This file also gets compiled if CONFIG_X86_GENERICARCH is set. Generic
+ * arch already has got following function definitions (asm-generic/es7000.c)
+ * hence no need to define these for that case.
+ */
+#ifndef CONFIG_X86_GENERICARCH
+void es7000_sw_apic(void);
+void __init enable_apic_mode(void)
+{
+        es7000_sw_apic();
+        return;
+}
+
+__init int mps_oem_check(struct mp_config_table *mpc, char *oem,
+                char *productid)
+{
+        if (mpc->mpc_oemptr) {
+                struct mp_config_oemtable *oem_table =
+                        (struct mp_config_oemtable *)mpc->mpc_oemptr;
+                if (!strncmp(oem, "UNISYS", 6))
+                        return parse_unisys_oem((char *)oem_table);
+        }
+        return 0;
+}
+#ifdef CONFIG_ACPI
+/* Hook from generic ACPI tables.c */
+int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
+{
+        unsigned long oem_addr;
+        if (!find_unisys_acpi_oem_table(&oem_addr)) {
+                if (es7000_check_dsdt())
+                        return parse_unisys_oem((char *)oem_addr);
+                else {
+                        setup_unisys();
+                        return 1;
+                }
+        }
+        return 0;
+}
+#else
+int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
+{
+        return 0;
+}
+#endif
+#endif /* COFIG_X86_GENERICARCH */
+
+static void
+es7000_spin(int n)
+{
+        int i = 0;
+
+        while (i++ < n)
+                rep_nop();
+}
+
+static int __init
+es7000_mip_write(struct mip_reg *mip_reg)
+{
+        int                     status = 0;
+        int                     spin;
+
+        spin = MIP_SPIN;
+        while (((unsigned long long)host_reg->off_38 &
+                (unsigned long long)MIP_VALID) != 0) {
+                        if (--spin <= 0) {
+                                printk("es7000_mip_write: Timeout waiting for Host Valid Flag");
+                                return -1;
+                        }
+                es7000_spin(MIP_SPIN);
+        }
+
+        memcpy(host_reg, mip_reg, sizeof(struct mip_reg));
+        outb(1, mip_port);
+
+        spin = MIP_SPIN;
+
+        while (((unsigned long long)mip_reg->off_38 &
+                (unsigned long long)MIP_VALID) == 0) {
+                if (--spin <= 0) {
+                        printk("es7000_mip_write: Timeout waiting for MIP Valid Flag");
+                        return -1;
+                }
+                es7000_spin(MIP_SPIN);
+        }
+
+        status = ((unsigned long long)mip_reg->off_0 &
+                (unsigned long long)0xffff0000000000ULL) >> 48;
+        mip_reg->off_38 = ((unsigned long long)mip_reg->off_38 &
+                (unsigned long long)~MIP_VALID);
+        return status;
+}
+
+int
+es7000_start_cpu(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;
+
+}
+
+int
+es7000_stop_cpu(int cpu)
+{
+        int startup;
+
+        if (psai == NULL)
+                return -1;
+
+        startup= (0x1000000 | cpu);
+
+        while ((*psai & 0xff00ffff) != startup)
+                ;
+
+        startup = (*psai & 0xff0000) >> 16;
+        *psai &= 0xffffff;
+
+        return 0;
+
+}
+
+void __init
+es7000_sw_apic()
+{
+        if (es7000_plat) {
+                int mip_status;
+                struct mip_reg es7000_mip_reg;
+
+                printk("ES7000: Enabling APIC mode.\n");
+                memset(&es7000_mip_reg, 0, sizeof(struct mip_reg));
+                es7000_mip_reg.off_0 = MIP_SW_APIC;
+                es7000_mip_reg.off_38 = (MIP_VALID);
+                while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0)
+                        printk("es7000_sw_apic: command failed, status = %x\n",
+                                mip_status);
+                return;
+        }
+}