2005-04-16 15:20:36 -07:00
|
|
|
/* Copyright (C) 1999,2001
|
|
|
|
*
|
|
|
|
* Author: J.E.J.Bottomley@HansenPartnership.com
|
|
|
|
*
|
|
|
|
* linux/arch/i386/kernel/voyager.c
|
|
|
|
*
|
|
|
|
* This file contains all the voyager specific routines for getting
|
|
|
|
* initialisation of the architecture to function. For additional
|
|
|
|
* features see:
|
|
|
|
*
|
|
|
|
* voyager_cat.c - Voyager CAT bus interface
|
|
|
|
* voyager_smp.c - Voyager SMP hal (emulates linux smp.c)
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/types.h>
|
|
|
|
#include <linux/sched.h>
|
|
|
|
#include <linux/ptrace.h>
|
|
|
|
#include <linux/ioport.h>
|
|
|
|
#include <linux/interrupt.h>
|
|
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/delay.h>
|
|
|
|
#include <linux/reboot.h>
|
|
|
|
#include <linux/sysrq.h>
|
2006-02-24 14:04:10 -07:00
|
|
|
#include <linux/smp.h>
|
|
|
|
#include <linux/nodemask.h>
|
2005-04-16 15:20:36 -07:00
|
|
|
#include <asm/io.h>
|
|
|
|
#include <asm/voyager.h>
|
|
|
|
#include <asm/vic.h>
|
|
|
|
#include <linux/pm.h>
|
|
|
|
#include <asm/tlbflush.h>
|
|
|
|
#include <asm/arch_hooks.h>
|
2005-06-30 02:58:55 -07:00
|
|
|
#include <asm/i8253.h>
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Power off function, if any
|
|
|
|
*/
|
|
|
|
void (*pm_power_off)(void);
|
2005-07-13 06:38:05 -07:00
|
|
|
EXPORT_SYMBOL(pm_power_off);
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
int voyager_level = 0;
|
|
|
|
|
|
|
|
struct voyager_SUS *voyager_SUS = NULL;
|
|
|
|
|
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
static void
|
2006-10-12 20:25:03 -07:00
|
|
|
voyager_dump(int dummy1, struct tty_struct *dummy3)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
|
|
|
/* get here via a sysrq */
|
|
|
|
voyager_smp_dump();
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct sysrq_key_op sysrq_voyager_dump_op = {
|
|
|
|
.handler = voyager_dump,
|
|
|
|
.help_msg = "Voyager",
|
|
|
|
.action_msg = "Dump Voyager Status",
|
|
|
|
};
|
|
|
|
#endif
|
|
|
|
|
|
|
|
void
|
|
|
|
voyager_detect(struct voyager_bios_info *bios)
|
|
|
|
{
|
|
|
|
if(bios->len != 0xff) {
|
|
|
|
int class = (bios->class_1 << 8)
|
|
|
|
| (bios->class_2 & 0xff);
|
|
|
|
|
|
|
|
printk("Voyager System detected.\n"
|
|
|
|
" Class %x, Revision %d.%d\n",
|
|
|
|
class, bios->major, bios->minor);
|
|
|
|
if(class == VOYAGER_LEVEL4)
|
|
|
|
voyager_level = 4;
|
|
|
|
else if(class < VOYAGER_LEVEL5_AND_ABOVE)
|
|
|
|
voyager_level = 3;
|
|
|
|
else
|
|
|
|
voyager_level = 5;
|
|
|
|
printk(" Architecture Level %d\n", voyager_level);
|
|
|
|
if(voyager_level < 4)
|
|
|
|
printk("\n**WARNING**: Voyager HAL only supports Levels 4 and 5 Architectures at the moment\n\n");
|
|
|
|
/* install the power off handler */
|
|
|
|
pm_power_off = voyager_power_off;
|
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
register_sysrq_key('v', &sysrq_voyager_dump_op);
|
|
|
|
#endif
|
|
|
|
} else {
|
|
|
|
printk("\n\n**WARNING**: No Voyager Subsystem Found\n");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.
The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).
Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.
Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.
I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.
This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);
I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().
Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.
(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.
(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.
Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 06:55:46 -07:00
|
|
|
voyager_system_interrupt(int cpl, void *dev_id)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
|
|
|
printk("Voyager: detected system interrupt\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Routine to read information from the extended CMOS area */
|
|
|
|
__u8
|
|
|
|
voyager_extended_cmos_read(__u16 addr)
|
|
|
|
{
|
|
|
|
outb(addr & 0xff, 0x74);
|
|
|
|
outb((addr >> 8) & 0xff, 0x75);
|
|
|
|
return inb(0x76);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* internal definitions for the SUS Click Map of memory */
|
|
|
|
|
|
|
|
#define CLICK_ENTRIES 16
|
|
|
|
#define CLICK_SIZE 4096 /* click to byte conversion for Length */
|
|
|
|
|
|
|
|
typedef struct ClickMap {
|
|
|
|
struct Entry {
|
|
|
|
__u32 Address;
|
|
|
|
__u32 Length;
|
|
|
|
} Entry[CLICK_ENTRIES];
|
|
|
|
} ClickMap_t;
|
|
|
|
|
|
|
|
|
|
|
|
/* This routine is pretty much an awful hack to read the bios clickmap by
|
|
|
|
* mapping it into page 0. There are usually three regions in the map:
|
|
|
|
* Base Memory
|
|
|
|
* Extended Memory
|
|
|
|
* zero length marker for end of map
|
|
|
|
*
|
|
|
|
* Returns are 0 for failure and 1 for success on extracting region.
|
|
|
|
*/
|
|
|
|
int __init
|
|
|
|
voyager_memory_detect(int region, __u32 *start, __u32 *length)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
int retval = 0;
|
|
|
|
__u8 cmos[4];
|
|
|
|
ClickMap_t *map;
|
|
|
|
unsigned long map_addr;
|
|
|
|
unsigned long old;
|
|
|
|
|
|
|
|
if(region >= CLICK_ENTRIES) {
|
|
|
|
printk("Voyager: Illegal ClickMap region %d\n", region);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
for(i = 0; i < sizeof(cmos); i++)
|
|
|
|
cmos[i] = voyager_extended_cmos_read(VOYAGER_MEMORY_CLICKMAP + i);
|
|
|
|
|
|
|
|
map_addr = *(unsigned long *)cmos;
|
|
|
|
|
|
|
|
/* steal page 0 for this */
|
|
|
|
old = pg0[0];
|
|
|
|
pg0[0] = ((map_addr & PAGE_MASK) | _PAGE_RW | _PAGE_PRESENT);
|
|
|
|
local_flush_tlb();
|
|
|
|
/* now clear everything out but page 0 */
|
|
|
|
map = (ClickMap_t *)(map_addr & (~PAGE_MASK));
|
|
|
|
|
|
|
|
/* zero length is the end of the clickmap */
|
|
|
|
if(map->Entry[region].Length != 0) {
|
|
|
|
*length = map->Entry[region].Length * CLICK_SIZE;
|
|
|
|
*start = map->Entry[region].Address;
|
|
|
|
retval = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* replace the mapping */
|
|
|
|
pg0[0] = old;
|
|
|
|
local_flush_tlb();
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* voyager specific handling code for timer interrupts. Used to hand
|
|
|
|
* off the timer tick to the SMP code, since the VIC doesn't have an
|
|
|
|
* internal timer (The QIC does, but that's another story). */
|
|
|
|
void
|
2006-10-12 20:25:03 -07:00
|
|
|
voyager_timer_interrupt(void)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
|
|
|
if((jiffies & 0x3ff) == 0) {
|
|
|
|
|
|
|
|
/* There seems to be something flaky in either
|
|
|
|
* hardware or software that is resetting the timer 0
|
|
|
|
* count to something much higher than it should be
|
|
|
|
* This seems to occur in the boot sequence, just
|
|
|
|
* before root is mounted. Therefore, every 10
|
|
|
|
* seconds or so, we sanity check the timer zero count
|
|
|
|
* and kick it back to where it should be.
|
|
|
|
*
|
|
|
|
* FIXME: This is the most awful hack yet seen. I
|
|
|
|
* should work out exactly what is interfering with
|
|
|
|
* the timer count settings early in the boot sequence
|
|
|
|
* and swiftly introduce it to something sharp and
|
|
|
|
* pointy. */
|
|
|
|
__u16 val;
|
|
|
|
|
|
|
|
spin_lock(&i8253_lock);
|
|
|
|
|
|
|
|
outb_p(0x00, 0x43);
|
|
|
|
val = inb_p(0x40);
|
|
|
|
val |= inb(0x40) << 8;
|
|
|
|
spin_unlock(&i8253_lock);
|
|
|
|
|
|
|
|
if(val > LATCH) {
|
|
|
|
printk("\nVOYAGER: countdown timer value too high (%d), resetting\n\n", val);
|
|
|
|
spin_lock(&i8253_lock);
|
|
|
|
outb(0x34,0x43);
|
|
|
|
outb_p(LATCH & 0xff , 0x40); /* LSB */
|
|
|
|
outb(LATCH >> 8 , 0x40); /* MSB */
|
|
|
|
spin_unlock(&i8253_lock);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
2006-10-12 20:25:03 -07:00
|
|
|
smp_vic_timer_interrupt();
|
2005-04-16 15:20:36 -07:00
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
voyager_power_off(void)
|
|
|
|
{
|
|
|
|
printk("VOYAGER Power Off\n");
|
|
|
|
|
|
|
|
if(voyager_level == 5) {
|
|
|
|
voyager_cat_power_off();
|
|
|
|
} else if(voyager_level == 4) {
|
|
|
|
/* This doesn't apparently work on most L4 machines,
|
|
|
|
* but the specs say to do this to get automatic power
|
|
|
|
* off. Unfortunately, if it doesn't power off the
|
|
|
|
* machine, it ends up doing a cold restart, which
|
|
|
|
* isn't really intended, so comment out the code */
|
|
|
|
#if 0
|
|
|
|
int port;
|
|
|
|
|
|
|
|
|
|
|
|
/* enable the voyager Configuration Space */
|
|
|
|
outb((inb(VOYAGER_MC_SETUP) & 0xf0) | 0x8,
|
|
|
|
VOYAGER_MC_SETUP);
|
|
|
|
/* the port for the power off flag is an offset from the
|
|
|
|
floating base */
|
|
|
|
port = (inb(VOYAGER_SSPB_RELOCATION_PORT) << 8) + 0x21;
|
|
|
|
/* set the power off flag */
|
|
|
|
outb(inb(port) | 0x1, port);
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
/* and wait for it to happen */
|
2005-09-03 15:56:42 -07:00
|
|
|
local_irq_disable();
|
|
|
|
for(;;)
|
|
|
|
halt();
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
/* copied from process.c */
|
|
|
|
static inline void
|
|
|
|
kb_wait(void)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i=0; i<0x10000; i++)
|
|
|
|
if ((inb_p(0x64) & 0x02) == 0)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2005-08-06 12:42:45 -07:00
|
|
|
void
|
|
|
|
machine_shutdown(void)
|
|
|
|
{
|
|
|
|
/* Architecture specific shutdown needed before a kexec */
|
|
|
|
}
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
void
|
|
|
|
machine_restart(char *cmd)
|
|
|
|
{
|
|
|
|
printk("Voyager Warm Restart\n");
|
|
|
|
kb_wait();
|
|
|
|
|
|
|
|
if(voyager_level == 5) {
|
|
|
|
/* write magic values to the RTC to inform system that
|
|
|
|
* shutdown is beginning */
|
|
|
|
outb(0x8f, 0x70);
|
|
|
|
outb(0x5 , 0x71);
|
|
|
|
|
|
|
|
udelay(50);
|
|
|
|
outb(0xfe,0x64); /* pull reset low */
|
|
|
|
} else if(voyager_level == 4) {
|
|
|
|
__u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT)<<8;
|
|
|
|
__u8 basebd = inb(VOYAGER_MC_SETUP);
|
|
|
|
|
|
|
|
outb(basebd | 0x08, VOYAGER_MC_SETUP);
|
|
|
|
outb(0x02, catbase + 0x21);
|
|
|
|
}
|
2005-09-03 15:56:42 -07:00
|
|
|
local_irq_disable();
|
|
|
|
for(;;)
|
|
|
|
halt();
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
|
|
|
|
2005-08-05 11:59:34 -07:00
|
|
|
void
|
|
|
|
machine_emergency_restart(void)
|
|
|
|
{
|
|
|
|
/*for now, just hook this to a warm restart */
|
|
|
|
machine_restart(NULL);
|
|
|
|
}
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
void
|
|
|
|
mca_nmi_hook(void)
|
|
|
|
{
|
|
|
|
__u8 dumpval __attribute__((unused)) = inb(0xf823);
|
|
|
|
__u8 swnmi __attribute__((unused)) = inb(0xf813);
|
|
|
|
|
|
|
|
/* FIXME: assume dump switch pressed */
|
|
|
|
/* check to see if the dump switch was pressed */
|
|
|
|
VDEBUG(("VOYAGER: dumpval = 0x%x, swnmi = 0x%x\n", dumpval, swnmi));
|
|
|
|
/* clear swnmi */
|
|
|
|
outb(0xff, 0xf813);
|
|
|
|
/* tell SUS to ignore dump */
|
|
|
|
if(voyager_level == 5 && voyager_SUS != NULL) {
|
|
|
|
if(voyager_SUS->SUS_mbox == VOYAGER_DUMP_BUTTON_NMI) {
|
|
|
|
voyager_SUS->kernel_mbox = VOYAGER_NO_COMMAND;
|
|
|
|
voyager_SUS->kernel_flags |= VOYAGER_OS_IN_PROGRESS;
|
|
|
|
udelay(1000);
|
|
|
|
voyager_SUS->kernel_mbox = VOYAGER_IGNORE_DUMP;
|
|
|
|
voyager_SUS->kernel_flags &= ~VOYAGER_OS_IN_PROGRESS;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
printk(KERN_ERR "VOYAGER: Dump switch pressed, printing CPU%d tracebacks\n", smp_processor_id());
|
|
|
|
show_stack(NULL, NULL);
|
|
|
|
show_state();
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
machine_halt(void)
|
|
|
|
{
|
|
|
|
/* treat a halt like a power off */
|
|
|
|
machine_power_off();
|
|
|
|
}
|
|
|
|
|
|
|
|
void machine_power_off(void)
|
|
|
|
{
|
|
|
|
if (pm_power_off)
|
|
|
|
pm_power_off();
|
|
|
|
}
|