255 строки
6.2 KiB
C
255 строки
6.2 KiB
C
/*
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* Copyright (C) 2006-2007 PA Semi, Inc
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*
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* Authors: Kip Walker, PA Semi
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* Olof Johansson, PA Semi
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*
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* Maintained by: Olof Johansson <olof@lixom.net>
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*
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* Based on arch/powerpc/platforms/maple/setup.c
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/console.h>
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#include <linux/pci.h>
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#include <asm/prom.h>
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#include <asm/system.h>
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#include <asm/iommu.h>
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#include <asm/machdep.h>
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#include <asm/mpic.h>
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#include <asm/smp.h>
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#include <asm/time.h>
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#include <asm/of_platform.h>
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#include "pasemi.h"
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static void __iomem *reset_reg;
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static void pas_restart(char *cmd)
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{
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printk("Restarting...\n");
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while (1)
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out_le32(reset_reg, 0x6000000);
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}
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#ifdef CONFIG_SMP
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static DEFINE_SPINLOCK(timebase_lock);
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static void __devinit pas_give_timebase(void)
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{
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unsigned long tb;
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spin_lock(&timebase_lock);
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mtspr(SPRN_TBCTL, TBCTL_FREEZE);
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tb = mftb();
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mtspr(SPRN_TBCTL, TBCTL_UPDATE_LOWER | (tb & 0xffffffff));
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mtspr(SPRN_TBCTL, TBCTL_UPDATE_UPPER | (tb >> 32));
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mtspr(SPRN_TBCTL, TBCTL_RESTART);
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spin_unlock(&timebase_lock);
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pr_debug("pas_give_timebase: cpu %d gave tb %lx\n",
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smp_processor_id(), tb);
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}
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static void __devinit pas_take_timebase(void)
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{
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pr_debug("pas_take_timebase: cpu %d has tb %lx\n",
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smp_processor_id(), mftb());
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}
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struct smp_ops_t pas_smp_ops = {
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.probe = smp_mpic_probe,
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.message_pass = smp_mpic_message_pass,
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.kick_cpu = smp_generic_kick_cpu,
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.setup_cpu = smp_mpic_setup_cpu,
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.give_timebase = pas_give_timebase,
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.take_timebase = pas_take_timebase,
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};
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#endif /* CONFIG_SMP */
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void __init pas_setup_arch(void)
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{
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#ifdef CONFIG_SMP
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/* Setup SMP callback */
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smp_ops = &pas_smp_ops;
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#endif
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/* Lookup PCI hosts */
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pas_pci_init();
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#ifdef CONFIG_DUMMY_CONSOLE
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conswitchp = &dummy_con;
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#endif
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/* Remap SDC register for doing reset */
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/* XXXOJN This should maybe come out of the device tree */
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reset_reg = ioremap(0xfc101100, 4);
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pasemi_idle_init();
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}
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static __init void pas_init_IRQ(void)
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{
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struct device_node *np;
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struct device_node *root, *mpic_node;
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unsigned long openpic_addr;
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const unsigned int *opprop;
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int naddr, opplen;
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struct mpic *mpic;
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mpic_node = NULL;
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for_each_node_by_type(np, "interrupt-controller")
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if (of_device_is_compatible(np, "open-pic")) {
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mpic_node = np;
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break;
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}
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if (!mpic_node)
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for_each_node_by_type(np, "open-pic") {
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mpic_node = np;
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break;
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}
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if (!mpic_node) {
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printk(KERN_ERR
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"Failed to locate the MPIC interrupt controller\n");
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return;
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}
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/* Find address list in /platform-open-pic */
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root = of_find_node_by_path("/");
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naddr = of_n_addr_cells(root);
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opprop = of_get_property(root, "platform-open-pic", &opplen);
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if (!opprop) {
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printk(KERN_ERR "No platform-open-pic property.\n");
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of_node_put(root);
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return;
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}
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openpic_addr = of_read_number(opprop, naddr);
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printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
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mpic = mpic_alloc(mpic_node, openpic_addr,
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MPIC_PRIMARY|MPIC_LARGE_VECTORS|MPIC_WANTS_RESET,
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0, 0, " PAS-OPIC ");
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BUG_ON(!mpic);
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mpic_assign_isu(mpic, 0, openpic_addr + 0x10000);
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mpic_init(mpic);
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of_node_put(mpic_node);
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of_node_put(root);
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}
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static void __init pas_progress(char *s, unsigned short hex)
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{
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printk("[%04x] : %s\n", hex, s ? s : "");
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}
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static int pas_machine_check_handler(struct pt_regs *regs)
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{
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int cpu = smp_processor_id();
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unsigned long srr0, srr1, dsisr;
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srr0 = regs->nip;
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srr1 = regs->msr;
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dsisr = mfspr(SPRN_DSISR);
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printk(KERN_ERR "Machine Check on CPU %d\n", cpu);
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printk(KERN_ERR "SRR0 0x%016lx SRR1 0x%016lx\n", srr0, srr1);
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printk(KERN_ERR "DSISR 0x%016lx DAR 0x%016lx\n", dsisr, regs->dar);
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printk(KERN_ERR "Cause:\n");
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if (srr1 & 0x200000)
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printk(KERN_ERR "Signalled by SDC\n");
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if (srr1 & 0x100000) {
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printk(KERN_ERR "Load/Store detected error:\n");
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if (dsisr & 0x8000)
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printk(KERN_ERR "D-cache ECC double-bit error or bus error\n");
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if (dsisr & 0x4000)
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printk(KERN_ERR "LSU snoop response error\n");
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if (dsisr & 0x2000)
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printk(KERN_ERR "MMU SLB multi-hit or invalid B field\n");
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if (dsisr & 0x1000)
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printk(KERN_ERR "Recoverable Duptags\n");
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if (dsisr & 0x800)
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printk(KERN_ERR "Recoverable D-cache parity error count overflow\n");
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if (dsisr & 0x400)
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printk(KERN_ERR "TLB parity error count overflow\n");
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}
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if (srr1 & 0x80000)
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printk(KERN_ERR "Bus Error\n");
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if (srr1 & 0x40000)
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printk(KERN_ERR "I-side SLB multiple hit\n");
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if (srr1 & 0x20000)
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printk(KERN_ERR "I-cache parity error hit\n");
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/* SRR1[62] is from MSR[62] if recoverable, so pass that back */
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return !!(srr1 & 0x2);
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}
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static void __init pas_init_early(void)
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{
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iommu_init_early_pasemi();
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}
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static struct of_device_id pasemi_bus_ids[] = {
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{ .type = "sdc", },
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{},
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};
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static int __init pasemi_publish_devices(void)
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{
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if (!machine_is(pasemi))
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return 0;
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/* Publish OF platform devices for SDC and other non-PCI devices */
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of_platform_bus_probe(NULL, pasemi_bus_ids, NULL);
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return 0;
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}
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device_initcall(pasemi_publish_devices);
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/*
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* Called very early, MMU is off, device-tree isn't unflattened
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*/
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static int __init pas_probe(void)
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{
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unsigned long root = of_get_flat_dt_root();
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if (!of_flat_dt_is_compatible(root, "PA6T-1682M"))
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return 0;
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hpte_init_native();
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alloc_iobmap_l2();
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return 1;
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}
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define_machine(pasemi) {
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.name = "PA Semi PA6T-1682M",
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.probe = pas_probe,
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.setup_arch = pas_setup_arch,
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.init_early = pas_init_early,
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.init_IRQ = pas_init_IRQ,
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.get_irq = mpic_get_irq,
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.restart = pas_restart,
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.get_boot_time = pas_get_boot_time,
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.calibrate_decr = generic_calibrate_decr,
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.progress = pas_progress,
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.machine_check_exception = pas_machine_check_handler,
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};
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