1 files changed, 316 insertions, 0 deletions

diff --git a/arch/i386/mach-es7000/es7000plat.c b/arch/i386/mach-es7000/es7000plat.c
new file mode 100644
index 000000000000..d5936d500479
--- /dev/null
+++ b/arch/i386/mach-es7000/es7000plat.c
@@ -0,0 +1,316 @@
+/*
+ * 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"
+
+/*
+ * 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;
+
+#if defined(CONFIG_X86_IO_APIC) && (defined(CONFIG_ACPI_INTERPRETER) || defined(CONFIG_ACPI_BOOT))
+
+/*
+ * GSI override for ES7000 platforms.
+ */
+
+static unsigned int base;
+
+static int
+es7000_rename_gsi(int ioapic, int 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;
+}
+
+#endif // (CONFIG_X86_IO_APIC) && (CONFIG_ACPI_INTERPRETER || CONFIG_ACPI_BOOT)
+
+/*
+ * Parse the OEM Table
+ */
+
+int __init
+parse_unisys_oem (char *oemptr, int oem_entries)
+{
+        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 <= oem_entries; 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;
+                }
+                if (i == 6) break;
+                tp += size;
+        }
+
+        if (success < 2) {
+                es7000_plat = 0;
+        } else {
+                printk("\nEnabling ES7000 specific features...\n");
+                /*
+                 * Determine the generation of the ES7000 currently running.
+                 *
+                 * es7000_plat = 0 if the machine is NOT a Unisys ES7000 box
+                 * 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 = 2;
+                else
+                        es7000_plat = 1;
+
+                ioapic_renumber_irq = es7000_rename_gsi;
+        }
+        return es7000_plat;
+}
+
+int __init
+find_unisys_acpi_oem_table(unsigned long *oem_addr, int *length)
+{
+        struct acpi_table_rsdp          *rsdp = NULL;
+        unsigned long                   rsdp_phys = 0;
+        struct acpi_table_header        *header = NULL;
+        int                             i;
+        struct acpi_table_sdt           sdt;
+
+        rsdp_phys = acpi_find_rsdp();
+        rsdp = __va(rsdp_phys);
+        if (rsdp->rsdt_address) {
+                struct acpi_table_rsdt  *mapped_rsdt = NULL;
+                sdt.pa = rsdp->rsdt_address;
+
+                header = (struct acpi_table_header *)
+                        __acpi_map_table(sdt.pa, sizeof(struct acpi_table_header));
+                if (!header)
+                        return -ENODEV;
+
+                sdt.count = (header->length - sizeof(struct acpi_table_header)) >> 3;
+                mapped_rsdt = (struct acpi_table_rsdt *)
+                        __acpi_map_table(sdt.pa, header->length);
+                if (!mapped_rsdt)
+                        return -ENODEV;
+
+                header = &mapped_rsdt->header;
+
+                for (i = 0; i < sdt.count; i++)
+                        sdt.entry[i].pa = (unsigned long) mapped_rsdt->entry[i];
+        };
+        for (i = 0; i < sdt.count; i++) {
+
+                header = (struct acpi_table_header *)
+                        __acpi_map_table(sdt.entry[i].pa,
+                                sizeof(struct acpi_table_header));
+                if (!header)
+                        continue;
+                if (!strncmp((char *) &header->signature, "OEM1", 4)) {
+                        if (!strncmp((char *) &header->oem_id, "UNISYS", 6)) {
+                                void *addr;
+                                struct oem_table *t;
+                                acpi_table_print(header, sdt.entry[i].pa);
+                                t = (struct oem_table *) __acpi_map_table(sdt.entry[i].pa, header->length);
+                                addr = (void *) __acpi_map_table(t->OEMTableAddr, t->OEMTableSize);
+                                *length = header->length;
+                                *oem_addr = (unsigned long) addr;
+                                return 0;
+                        }
+                }
+        }
+        Dprintk("ES7000: did not find Unisys ACPI OEM table!\n");
+        return -1;
+}
+
+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;
+        }
+}