1 files changed, 269 insertions, 0 deletions

diff --git a/arch/alpha/kernel/sys_nautilus.c b/arch/alpha/kernel/sys_nautilus.c
new file mode 100644
index 000000000000..c0d696efec5b
--- /dev/null
+++ b/arch/alpha/kernel/sys_nautilus.c
@@ -0,0 +1,269 @@
+/*
+ *      linux/arch/alpha/kernel/sys_nautilus.c
+ *
+ *      Copyright (C) 1995 David A Rusling
+ *      Copyright (C) 1998 Richard Henderson
+ *      Copyright (C) 1999 Alpha Processor, Inc.,
+ *              (David Daniel, Stig Telfer, Soohoon Lee)
+ *
+ * Code supporting NAUTILUS systems.
+ *
+ *
+ * NAUTILUS has the following I/O features:
+ *
+ * a) Driven by AMD 751 aka IRONGATE (northbridge):
+ *     4 PCI slots
+ *     1 AGP slot
+ *
+ * b) Driven by ALI M1543C (southbridge)
+ *     2 ISA slots
+ *     2 IDE connectors
+ *     1 dual drive capable FDD controller
+ *     2 serial ports
+ *     1 ECP/EPP/SP parallel port
+ *     2 USB ports
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/reboot.h>
+#include <linux/bootmem.h>
+#include <linux/bitops.h>
+
+#include <asm/ptrace.h>
+#include <asm/system.h>
+#include <asm/dma.h>
+#include <asm/irq.h>
+#include <asm/mmu_context.h>
+#include <asm/io.h>
+#include <asm/pci.h>
+#include <asm/pgtable.h>
+#include <asm/core_irongate.h>
+#include <asm/hwrpb.h>
+#include <asm/tlbflush.h>
+
+#include "proto.h"
+#include "err_impl.h"
+#include "irq_impl.h"
+#include "pci_impl.h"
+#include "machvec_impl.h"
+
+
+static void __init
+nautilus_init_irq(void)
+{
+        if (alpha_using_srm) {
+                alpha_mv.device_interrupt = srm_device_interrupt;
+        }
+
+        init_i8259a_irqs();
+        common_init_isa_dma();
+}
+
+static int __init
+nautilus_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
+{
+        /* Preserve the IRQ set up by the console.  */
+
+        u8 irq;
+        pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
+        return irq;
+}
+
+void
+nautilus_kill_arch(int mode)
+{
+        struct pci_bus *bus = pci_isa_hose->bus;
+        u32 pmuport;
+        int off;
+
+        switch (mode) {
+        case LINUX_REBOOT_CMD_RESTART:
+                if (! alpha_using_srm) {
+                        u8 t8;
+                        pci_bus_read_config_byte(bus, 0x38, 0x43, &t8);
+                        pci_bus_write_config_byte(bus, 0x38, 0x43, t8 | 0x80);
+                        outb(1, 0x92);
+                        outb(0, 0x92);
+                        /* NOTREACHED */
+                }
+                break;
+
+        case LINUX_REBOOT_CMD_POWER_OFF:
+                /* Assume M1543C */
+                off = 0x2000;           /* SLP_TYPE = 0, SLP_EN = 1 */
+                pci_bus_read_config_dword(bus, 0x88, 0x10, &pmuport);
+                if (!pmuport) {
+                        /* M1535D/D+ */
+                        off = 0x3400;   /* SLP_TYPE = 5, SLP_EN = 1 */
+                        pci_bus_read_config_dword(bus, 0x88, 0xe0, &pmuport);
+                }
+                pmuport &= 0xfffe;
+                outw(0xffff, pmuport);  /* Clear pending events. */
+                outw(off, pmuport + 4);
+                /* NOTREACHED */
+                break;
+        }
+}
+
+/* Perform analysis of a machine check that arrived from the system (NMI) */
+
+static void
+naut_sys_machine_check(unsigned long vector, unsigned long la_ptr,
+                       struct pt_regs *regs)
+{
+        printk("PC %lx RA %lx\n", regs->pc, regs->r26);
+        irongate_pci_clr_err();
+}
+
+/* Machine checks can come from two sources - those on the CPU and those
+   in the system.  They are analysed separately but all starts here.  */
+
+void
+nautilus_machine_check(unsigned long vector, unsigned long la_ptr,
+                       struct pt_regs *regs)
+{
+        char *mchk_class;
+
+        /* Now for some analysis.  Machine checks fall into two classes --
+           those picked up by the system, and those picked up by the CPU.
+           Add to that the two levels of severity - correctable or not.  */
+
+        if (vector == SCB_Q_SYSMCHK
+            && ((IRONGATE0->dramms & 0x300) == 0x300)) {
+                unsigned long nmi_ctl;
+
+                /* Clear ALI NMI */
+                nmi_ctl = inb(0x61);
+                nmi_ctl |= 0x0c;
+                outb(nmi_ctl, 0x61);
+                nmi_ctl &= ~0x0c;
+                outb(nmi_ctl, 0x61);
+
+                /* Write again clears error bits.  */
+                IRONGATE0->stat_cmd = IRONGATE0->stat_cmd & ~0x100;
+                mb();
+                IRONGATE0->stat_cmd;
+
+                /* Write again clears error bits.  */
+                IRONGATE0->dramms = IRONGATE0->dramms;
+                mb();
+                IRONGATE0->dramms;
+
+                draina();
+                wrmces(0x7);
+                mb();
+                return;
+        }
+
+        if (vector == SCB_Q_SYSERR)
+                mchk_class = "Correctable";
+        else if (vector == SCB_Q_SYSMCHK)
+                mchk_class = "Fatal";
+        else {
+                ev6_machine_check(vector, la_ptr, regs);
+                return;
+        }
+
+        printk(KERN_CRIT "NAUTILUS Machine check 0x%lx "
+                         "[%s System Machine Check (NMI)]\n",
+               vector, mchk_class);
+
+        naut_sys_machine_check(vector, la_ptr, regs);
+
+        /* Tell the PALcode to clear the machine check */
+        draina();
+        wrmces(0x7);
+        mb();
+}
+
+extern void free_reserved_mem(void *, void *);
+
+static struct resource irongate_mem = {
+        .name   = "Irongate PCI MEM",
+        .flags  = IORESOURCE_MEM,
+};
+
+void __init
+nautilus_init_pci(void)
+{
+        struct pci_controller *hose = hose_head;
+        struct pci_bus *bus;
+        struct pci_dev *irongate;
+        unsigned long bus_align, bus_size, pci_mem;
+        unsigned long memtop = max_low_pfn << PAGE_SHIFT;
+
+        /* Scan our single hose.  */
+        bus = pci_scan_bus(0, alpha_mv.pci_ops, hose);
+        hose->bus = bus;
+
+        irongate = pci_find_slot(0, 0);
+        bus->self = irongate;
+        bus->resource[1] = &irongate_mem;
+
+        pci_bus_size_bridges(bus);
+
+        /* IO port range. */
+        bus->resource[0]->start = 0;
+        bus->resource[0]->end = 0xffff;
+
+        /* Set up PCI memory range - limit is hardwired to 0xffffffff,
+           base must be at aligned to 16Mb. */
+        bus_align = bus->resource[1]->start;
+        bus_size = bus->resource[1]->end + 1 - bus_align;
+        if (bus_align < 0x1000000UL)
+                bus_align = 0x1000000UL;
+
+        pci_mem = (0x100000000UL - bus_size) & -bus_align;
+
+        bus->resource[1]->start = pci_mem;
+        bus->resource[1]->end = 0xffffffffUL;
+        if (request_resource(&iomem_resource, bus->resource[1]) < 0)
+                printk(KERN_ERR "Failed to request MEM on hose 0\n");
+
+        if (pci_mem < memtop)
+                memtop = pci_mem;
+        if (memtop > alpha_mv.min_mem_address) {
+                free_reserved_mem(__va(alpha_mv.min_mem_address),
+                                  __va(memtop));
+                printk("nautilus_init_pci: %ldk freed\n",
+                        (memtop - alpha_mv.min_mem_address) >> 10);
+        }
+
+        if ((IRONGATE0->dev_vendor >> 16) > 0x7006)     /* Albacore? */
+                IRONGATE0->pci_mem = pci_mem;
+
+        pci_bus_assign_resources(bus);
+        pci_fixup_irqs(alpha_mv.pci_swizzle, alpha_mv.pci_map_irq);
+}
+
+/*
+ * The System Vectors
+ */
+
+struct alpha_machine_vector nautilus_mv __initmv = {
+        .vector_name            = "Nautilus",
+        DO_EV6_MMU,
+        DO_DEFAULT_RTC,
+        DO_IRONGATE_IO,
+        .machine_check          = nautilus_machine_check,
+        .max_isa_dma_address    = ALPHA_MAX_ISA_DMA_ADDRESS,
+        .min_io_address         = DEFAULT_IO_BASE,
+        .min_mem_address        = IRONGATE_DEFAULT_MEM_BASE,
+
+        .nr_irqs                = 16,
+        .device_interrupt       = isa_device_interrupt,
+
+        .init_arch              = irongate_init_arch,
+        .init_irq               = nautilus_init_irq,
+        .init_rtc               = common_init_rtc,
+        .init_pci               = nautilus_init_pci,
+        .kill_arch              = nautilus_kill_arch,
+        .pci_map_irq            = nautilus_map_irq,
+        .pci_swizzle            = common_swizzle,
+};
+ALIAS_MV(nautilus)