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