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!

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 0000000..c0d696e
--- /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)