4297c9869b
Some systems supported by the maple platform (e.g. JS2x blades running SLOF) are able to use the mmio_nvram backend for reading and writing nvram. This is an improvement over the current situation -- no nvram access from userspace at all. Select MMIO_NVRAM for the maple platform. Initialize the mmio_nvram backend from maple setup code. Signed-off-by: Nathan Lynch <ntl@pobox.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
346 lines
8.6 KiB
C
346 lines
8.6 KiB
C
/*
|
|
* Maple (970 eval board) setup code
|
|
*
|
|
* (c) Copyright 2004 Benjamin Herrenschmidt (benh@kernel.crashing.org),
|
|
* IBM Corp.
|
|
*
|
|
* 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/init.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/stddef.h>
|
|
#include <linux/unistd.h>
|
|
#include <linux/ptrace.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/user.h>
|
|
#include <linux/a.out.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/string.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/major.h>
|
|
#include <linux/initrd.h>
|
|
#include <linux/vt_kern.h>
|
|
#include <linux/console.h>
|
|
#include <linux/ide.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/adb.h>
|
|
#include <linux/cuda.h>
|
|
#include <linux/pmu.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/root_dev.h>
|
|
#include <linux/serial.h>
|
|
#include <linux/smp.h>
|
|
|
|
#include <asm/processor.h>
|
|
#include <asm/sections.h>
|
|
#include <asm/prom.h>
|
|
#include <asm/system.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/bitops.h>
|
|
#include <asm/io.h>
|
|
#include <asm/kexec.h>
|
|
#include <asm/pci-bridge.h>
|
|
#include <asm/iommu.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/dma.h>
|
|
#include <asm/cputable.h>
|
|
#include <asm/time.h>
|
|
#include <asm/of_device.h>
|
|
#include <asm/lmb.h>
|
|
#include <asm/mpic.h>
|
|
#include <asm/rtas.h>
|
|
#include <asm/udbg.h>
|
|
#include <asm/nvram.h>
|
|
|
|
#include "maple.h"
|
|
|
|
#ifdef DEBUG
|
|
#define DBG(fmt...) udbg_printf(fmt)
|
|
#else
|
|
#define DBG(fmt...)
|
|
#endif
|
|
|
|
static unsigned long maple_find_nvram_base(void)
|
|
{
|
|
struct device_node *rtcs;
|
|
unsigned long result = 0;
|
|
|
|
/* find NVRAM device */
|
|
rtcs = of_find_compatible_node(NULL, "nvram", "AMD8111");
|
|
if (rtcs) {
|
|
struct resource r;
|
|
if (of_address_to_resource(rtcs, 0, &r)) {
|
|
printk(KERN_EMERG "Maple: Unable to translate NVRAM"
|
|
" address\n");
|
|
goto bail;
|
|
}
|
|
if (!(r.flags & IORESOURCE_IO)) {
|
|
printk(KERN_EMERG "Maple: NVRAM address isn't PIO!\n");
|
|
goto bail;
|
|
}
|
|
result = r.start;
|
|
} else
|
|
printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
|
|
bail:
|
|
of_node_put(rtcs);
|
|
return result;
|
|
}
|
|
|
|
static void maple_restart(char *cmd)
|
|
{
|
|
unsigned int maple_nvram_base;
|
|
const unsigned int *maple_nvram_offset, *maple_nvram_command;
|
|
struct device_node *sp;
|
|
|
|
maple_nvram_base = maple_find_nvram_base();
|
|
if (maple_nvram_base == 0)
|
|
goto fail;
|
|
|
|
/* find service processor device */
|
|
sp = of_find_node_by_name(NULL, "service-processor");
|
|
if (!sp) {
|
|
printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
|
|
goto fail;
|
|
}
|
|
maple_nvram_offset = get_property(sp, "restart-addr", NULL);
|
|
maple_nvram_command = get_property(sp, "restart-value", NULL);
|
|
of_node_put(sp);
|
|
|
|
/* send command */
|
|
outb_p(*maple_nvram_command, maple_nvram_base + *maple_nvram_offset);
|
|
for (;;) ;
|
|
fail:
|
|
printk(KERN_EMERG "Maple: Manual Restart Required\n");
|
|
}
|
|
|
|
static void maple_power_off(void)
|
|
{
|
|
unsigned int maple_nvram_base;
|
|
const unsigned int *maple_nvram_offset, *maple_nvram_command;
|
|
struct device_node *sp;
|
|
|
|
maple_nvram_base = maple_find_nvram_base();
|
|
if (maple_nvram_base == 0)
|
|
goto fail;
|
|
|
|
/* find service processor device */
|
|
sp = of_find_node_by_name(NULL, "service-processor");
|
|
if (!sp) {
|
|
printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
|
|
goto fail;
|
|
}
|
|
maple_nvram_offset = get_property(sp, "power-off-addr", NULL);
|
|
maple_nvram_command = get_property(sp, "power-off-value", NULL);
|
|
of_node_put(sp);
|
|
|
|
/* send command */
|
|
outb_p(*maple_nvram_command, maple_nvram_base + *maple_nvram_offset);
|
|
for (;;) ;
|
|
fail:
|
|
printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
|
|
}
|
|
|
|
static void maple_halt(void)
|
|
{
|
|
maple_power_off();
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
|
struct smp_ops_t maple_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 = smp_generic_give_timebase,
|
|
.take_timebase = smp_generic_take_timebase,
|
|
};
|
|
#endif /* CONFIG_SMP */
|
|
|
|
static void __init maple_use_rtas_reboot_and_halt_if_present(void)
|
|
{
|
|
if (rtas_service_present("system-reboot") &&
|
|
rtas_service_present("power-off")) {
|
|
ppc_md.restart = rtas_restart;
|
|
ppc_md.power_off = rtas_power_off;
|
|
ppc_md.halt = rtas_halt;
|
|
}
|
|
}
|
|
|
|
void __init maple_setup_arch(void)
|
|
{
|
|
/* init to some ~sane value until calibrate_delay() runs */
|
|
loops_per_jiffy = 50000000;
|
|
|
|
/* Setup SMP callback */
|
|
#ifdef CONFIG_SMP
|
|
smp_ops = &maple_smp_ops;
|
|
#endif
|
|
/* Lookup PCI hosts */
|
|
maple_pci_init();
|
|
|
|
#ifdef CONFIG_DUMMY_CONSOLE
|
|
conswitchp = &dummy_con;
|
|
#endif
|
|
maple_use_rtas_reboot_and_halt_if_present();
|
|
|
|
printk(KERN_DEBUG "Using native/NAP idle loop\n");
|
|
|
|
mmio_nvram_init();
|
|
}
|
|
|
|
/*
|
|
* Early initialization.
|
|
*/
|
|
static void __init maple_init_early(void)
|
|
{
|
|
DBG(" -> maple_init_early\n");
|
|
|
|
iommu_init_early_dart();
|
|
|
|
DBG(" <- maple_init_early\n");
|
|
}
|
|
|
|
/*
|
|
* This is almost identical to pSeries and CHRP. We need to make that
|
|
* code generic at one point, with appropriate bits in the device-tree to
|
|
* identify the presence of an HT APIC
|
|
*/
|
|
static void __init maple_init_IRQ(void)
|
|
{
|
|
struct device_node *root, *np, *mpic_node = NULL;
|
|
const unsigned int *opprop;
|
|
unsigned long openpic_addr = 0;
|
|
int naddr, n, i, opplen, has_isus = 0;
|
|
struct mpic *mpic;
|
|
unsigned int flags = MPIC_PRIMARY;
|
|
|
|
/* Locate MPIC in the device-tree. Note that there is a bug
|
|
* in Maple device-tree where the type of the controller is
|
|
* open-pic and not interrupt-controller
|
|
*/
|
|
|
|
for_each_node_by_type(np, "interrupt-controller")
|
|
if (device_is_compatible(np, "open-pic")) {
|
|
mpic_node = np;
|
|
break;
|
|
}
|
|
if (mpic_node == NULL)
|
|
for_each_node_by_type(np, "open-pic") {
|
|
mpic_node = np;
|
|
break;
|
|
}
|
|
if (mpic_node == NULL) {
|
|
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 = prom_n_addr_cells(root);
|
|
opprop = get_property(root, "platform-open-pic", &opplen);
|
|
if (opprop != 0) {
|
|
openpic_addr = of_read_number(opprop, naddr);
|
|
has_isus = (opplen > naddr);
|
|
printk(KERN_DEBUG "OpenPIC addr: %lx, has ISUs: %d\n",
|
|
openpic_addr, has_isus);
|
|
}
|
|
|
|
BUG_ON(openpic_addr == 0);
|
|
|
|
/* Check for a big endian MPIC */
|
|
if (get_property(np, "big-endian", NULL) != NULL)
|
|
flags |= MPIC_BIG_ENDIAN;
|
|
|
|
/* XXX Maple specific bits */
|
|
flags |= MPIC_BROKEN_U3 | MPIC_WANTS_RESET;
|
|
/* All U3/U4 are big-endian, older SLOF firmware doesn't encode this */
|
|
flags |= MPIC_BIG_ENDIAN;
|
|
|
|
/* Setup the openpic driver. More device-tree junks, we hard code no
|
|
* ISUs for now. I'll have to revisit some stuffs with the folks doing
|
|
* the firmware for those
|
|
*/
|
|
mpic = mpic_alloc(mpic_node, openpic_addr, flags,
|
|
/*has_isus ? 16 :*/ 0, 0, " MPIC ");
|
|
BUG_ON(mpic == NULL);
|
|
|
|
/* Add ISUs */
|
|
opplen /= sizeof(u32);
|
|
for (n = 0, i = naddr; i < opplen; i += naddr, n++) {
|
|
unsigned long isuaddr = of_read_number(opprop + i, naddr);
|
|
mpic_assign_isu(mpic, n, isuaddr);
|
|
}
|
|
|
|
/* All ISUs are setup, complete initialization */
|
|
mpic_init(mpic);
|
|
ppc_md.get_irq = mpic_get_irq;
|
|
of_node_put(mpic_node);
|
|
of_node_put(root);
|
|
}
|
|
|
|
static void __init maple_progress(char *s, unsigned short hex)
|
|
{
|
|
printk("*** %04x : %s\n", hex, s ? s : "");
|
|
}
|
|
|
|
|
|
/*
|
|
* Called very early, MMU is off, device-tree isn't unflattened
|
|
*/
|
|
static int __init maple_probe(void)
|
|
{
|
|
unsigned long root = of_get_flat_dt_root();
|
|
|
|
if (!of_flat_dt_is_compatible(root, "Momentum,Maple") &&
|
|
!of_flat_dt_is_compatible(root, "Momentum,Apache"))
|
|
return 0;
|
|
/*
|
|
* On U3, the DART (iommu) must be allocated now since it
|
|
* has an impact on htab_initialize (due to the large page it
|
|
* occupies having to be broken up so the DART itself is not
|
|
* part of the cacheable linar mapping
|
|
*/
|
|
alloc_dart_table();
|
|
|
|
hpte_init_native();
|
|
|
|
return 1;
|
|
}
|
|
|
|
define_machine(maple_md) {
|
|
.name = "Maple",
|
|
.probe = maple_probe,
|
|
.setup_arch = maple_setup_arch,
|
|
.init_early = maple_init_early,
|
|
.init_IRQ = maple_init_IRQ,
|
|
.pci_irq_fixup = maple_pci_irq_fixup,
|
|
.pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq,
|
|
.restart = maple_restart,
|
|
.power_off = maple_power_off,
|
|
.halt = maple_halt,
|
|
.get_boot_time = maple_get_boot_time,
|
|
.set_rtc_time = maple_set_rtc_time,
|
|
.get_rtc_time = maple_get_rtc_time,
|
|
.calibrate_decr = generic_calibrate_decr,
|
|
.progress = maple_progress,
|
|
.power_save = power4_idle,
|
|
#ifdef CONFIG_KEXEC
|
|
.machine_kexec = default_machine_kexec,
|
|
.machine_kexec_prepare = default_machine_kexec_prepare,
|
|
.machine_crash_shutdown = default_machine_crash_shutdown,
|
|
#endif
|
|
};
|