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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/alpha/kernel/sys_nautilus.c
downloadlinux-stericsson-2.6.12-rc2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/alpha/kernel/sys_nautilus.c')
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diff --git a/arch/alpha/kernel/sys_nautilus.c b/arch/alpha/kernel/sys_nautilus.c
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+/*
+ * 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)