From 849369d6c66d3054688672f97d31fceb8e8230fb Mon Sep 17 00:00:00 2001 From: root Date: Fri, 25 Dec 2015 04:40:36 +0000 Subject: initial_commit --- arch/alpha/kernel/sys_nautilus.c | 280 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 280 insertions(+) create mode 100644 arch/alpha/kernel/sys_nautilus.c (limited to 'arch/alpha/kernel/sys_nautilus.c') diff --git a/arch/alpha/kernel/sys_nautilus.c b/arch/alpha/kernel/sys_nautilus.c new file mode 100644 index 00000000..99c0f46f --- /dev/null +++ b/arch/alpha/kernel/sys_nautilus.c @@ -0,0 +1,280 @@ +/* + * 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 +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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; + /* UP1500: AGP INTA is actually routed to IRQ 5, not IRQ 10 as + console reports. Check the device id of AGP bridge to distinguish + UP1500 from UP1000/1100. Note: 'pin' is 2 due to bridge swizzle. */ + if (slot == 1 && pin == 2 && + dev->bus->self && dev->bus->self->device == 0x700f) + return 5; + 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) +{ + 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); + 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, get_irq_regs()); + + /* Tell the PALcode to clear the machine check */ + draina(); + wrmces(0x7); + mb(); +} + +extern void free_reserved_mem(void *, void *); +extern void pcibios_claim_one_bus(struct pci_bus *); + +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; + pcibios_claim_one_bus(bus); + + irongate = pci_get_bus_and_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_common_swizzle() relies on bus->self being NULL + for the root bus, so just clear it. */ + bus->self = NULL; + 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) -- cgit v1.2.3