kernel-fxtec-pro1x/arch/powerpc/platforms/cell/setup.c
Jeremy Kerr 165785e5c0 [POWERPC] Cell iommu support
This patch adds full cell iommu support (and iommu disabled mode).

It implements mapping/unmapping of iommu pages on demand using the
standard powerpc iommu framework.  It also supports running with
iommu disabled for machines with less than 2GB of memory.  (The
default is off in that case, though it can be forced on with the
kernel command line option iommu=force).

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-12-04 20:39:02 +11:00

222 lines
5 KiB
C

/*
* linux/arch/powerpc/platforms/cell/cell_setup.c
*
* Copyright (C) 1995 Linus Torvalds
* Adapted from 'alpha' version by Gary Thomas
* Modified by Cort Dougan (cort@cs.nmt.edu)
* Modified by PPC64 Team, IBM Corp
* Modified by Cell Team, IBM Deutschland Entwicklung GmbH
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#undef DEBUG
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/console.h>
#include <linux/mutex.h>
#include <linux/memory_hotplug.h>
#include <asm/mmu.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <asm/kexec.h>
#include <asm/pgtable.h>
#include <asm/prom.h>
#include <asm/rtas.h>
#include <asm/pci-bridge.h>
#include <asm/iommu.h>
#include <asm/dma.h>
#include <asm/machdep.h>
#include <asm/time.h>
#include <asm/nvram.h>
#include <asm/cputable.h>
#include <asm/ppc-pci.h>
#include <asm/irq.h>
#include <asm/spu.h>
#include <asm/spu_priv1.h>
#include <asm/udbg.h>
#include <asm/mpic.h>
#include <asm/of_platform.h>
#include "interrupt.h"
#include "cbe_regs.h"
#include "pervasive.h"
#include "ras.h"
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
#else
#define DBG(fmt...)
#endif
static void cell_show_cpuinfo(struct seq_file *m)
{
struct device_node *root;
const char *model = "";
root = of_find_node_by_path("/");
if (root)
model = get_property(root, "model", NULL);
seq_printf(m, "machine\t\t: CHRP %s\n", model);
of_node_put(root);
}
static void cell_progress(char *s, unsigned short hex)
{
printk("*** %04x : %s\n", hex, s ? s : "");
}
static int __init cell_publish_devices(void)
{
if (!machine_is(cell))
return 0;
/* Publish OF platform devices for southbridge IOs */
of_platform_bus_probe(NULL, NULL, NULL);
return 0;
}
device_initcall(cell_publish_devices);
static void cell_mpic_cascade(unsigned int irq, struct irq_desc *desc)
{
struct mpic *mpic = desc->handler_data;
unsigned int virq;
virq = mpic_get_one_irq(mpic);
if (virq != NO_IRQ)
generic_handle_irq(virq);
desc->chip->eoi(irq);
}
static void __init mpic_init_IRQ(void)
{
struct device_node *dn;
struct mpic *mpic;
unsigned int virq;
for (dn = NULL;
(dn = of_find_node_by_name(dn, "interrupt-controller"));) {
if (!device_is_compatible(dn, "CBEA,platform-open-pic"))
continue;
/* The MPIC driver will get everything it needs from the
* device-tree, just pass 0 to all arguments
*/
mpic = mpic_alloc(dn, 0, 0, 0, 0, " MPIC ");
if (mpic == NULL)
continue;
mpic_init(mpic);
virq = irq_of_parse_and_map(dn, 0);
if (virq == NO_IRQ)
continue;
printk(KERN_INFO "%s : hooking up to IRQ %d\n",
dn->full_name, virq);
set_irq_data(virq, mpic);
set_irq_chained_handler(virq, cell_mpic_cascade);
}
}
static void __init cell_init_irq(void)
{
iic_init_IRQ();
spider_init_IRQ();
mpic_init_IRQ();
}
static void __init cell_setup_arch(void)
{
#ifdef CONFIG_SPU_BASE
spu_priv1_ops = &spu_priv1_mmio_ops;
#endif
cbe_regs_init();
#ifdef CONFIG_CBE_RAS
cbe_ras_init();
#endif
#ifdef CONFIG_SMP
smp_init_cell();
#endif
/* init to some ~sane value until calibrate_delay() runs */
loops_per_jiffy = 50000000;
if (ROOT_DEV == 0) {
printk("No ramdisk, default root is /dev/hda2\n");
ROOT_DEV = Root_HDA2;
}
/* Find and initialize PCI host bridges */
init_pci_config_tokens();
find_and_init_phbs();
cbe_pervasive_init();
#ifdef CONFIG_DUMMY_CONSOLE
conswitchp = &dummy_con;
#endif
mmio_nvram_init();
}
static int __init cell_probe(void)
{
unsigned long root = of_get_flat_dt_root();
if (!of_flat_dt_is_compatible(root, "IBM,CBEA") &&
!of_flat_dt_is_compatible(root, "IBM,CPBW-1.0"))
return 0;
hpte_init_native();
return 1;
}
/*
* Cell has no legacy IO; anything calling this function has to
* fail or bad things will happen
*/
static int cell_check_legacy_ioport(unsigned int baseport)
{
return -ENODEV;
}
define_machine(cell) {
.name = "Cell",
.probe = cell_probe,
.setup_arch = cell_setup_arch,
.show_cpuinfo = cell_show_cpuinfo,
.restart = rtas_restart,
.power_off = rtas_power_off,
.halt = rtas_halt,
.get_boot_time = rtas_get_boot_time,
.get_rtc_time = rtas_get_rtc_time,
.set_rtc_time = rtas_set_rtc_time,
.calibrate_decr = generic_calibrate_decr,
.check_legacy_ioport = cell_check_legacy_ioport,
.progress = cell_progress,
.init_IRQ = cell_init_irq,
.pci_setup_phb = rtas_setup_phb,
#ifdef CONFIG_KEXEC
.machine_kexec = default_machine_kexec,
.machine_kexec_prepare = default_machine_kexec_prepare,
.machine_crash_shutdown = default_machine_crash_shutdown,
#endif
};