153f805781
This patch: [PATCH] Remove i386_ksyms.c, almost made files like smp.c do their own EXPORT_SYMBOLS. This means that all subarchitectures that override these symbols now have to do the exports themselves. This patch adds the exports for voyager (which is the most affected since it has a separate smp harness). However, someone should audit all the other subarchitectures to see if any others got broken. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
327 lines
7.8 KiB
C
327 lines
7.8 KiB
C
/* Copyright (C) 1999,2001
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*
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* Author: J.E.J.Bottomley@HansenPartnership.com
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*
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* linux/arch/i386/kernel/voyager.c
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*
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* This file contains all the voyager specific routines for getting
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* initialisation of the architecture to function. For additional
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* features see:
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*
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* voyager_cat.c - Voyager CAT bus interface
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* voyager_smp.c - Voyager SMP hal (emulates linux smp.c)
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/ptrace.h>
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#include <linux/ioport.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/reboot.h>
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#include <linux/sysrq.h>
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#include <asm/io.h>
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#include <asm/voyager.h>
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#include <asm/vic.h>
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#include <linux/pm.h>
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#include <linux/irq.h>
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#include <asm/tlbflush.h>
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#include <asm/arch_hooks.h>
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#include <asm/i8253.h>
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/*
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* Power off function, if any
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*/
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void (*pm_power_off)(void);
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EXPORT_SYMBOL(pm_power_off);
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int voyager_level = 0;
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struct voyager_SUS *voyager_SUS = NULL;
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#ifdef CONFIG_SMP
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static void
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voyager_dump(int dummy1, struct pt_regs *dummy2, struct tty_struct *dummy3)
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{
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/* get here via a sysrq */
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voyager_smp_dump();
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}
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static struct sysrq_key_op sysrq_voyager_dump_op = {
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.handler = voyager_dump,
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.help_msg = "Voyager",
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.action_msg = "Dump Voyager Status",
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};
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#endif
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void
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voyager_detect(struct voyager_bios_info *bios)
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{
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if(bios->len != 0xff) {
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int class = (bios->class_1 << 8)
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| (bios->class_2 & 0xff);
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printk("Voyager System detected.\n"
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" Class %x, Revision %d.%d\n",
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class, bios->major, bios->minor);
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if(class == VOYAGER_LEVEL4)
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voyager_level = 4;
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else if(class < VOYAGER_LEVEL5_AND_ABOVE)
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voyager_level = 3;
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else
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voyager_level = 5;
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printk(" Architecture Level %d\n", voyager_level);
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if(voyager_level < 4)
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printk("\n**WARNING**: Voyager HAL only supports Levels 4 and 5 Architectures at the moment\n\n");
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/* install the power off handler */
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pm_power_off = voyager_power_off;
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#ifdef CONFIG_SMP
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register_sysrq_key('v', &sysrq_voyager_dump_op);
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#endif
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} else {
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printk("\n\n**WARNING**: No Voyager Subsystem Found\n");
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}
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}
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void
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voyager_system_interrupt(int cpl, void *dev_id, struct pt_regs *regs)
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{
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printk("Voyager: detected system interrupt\n");
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}
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/* Routine to read information from the extended CMOS area */
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__u8
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voyager_extended_cmos_read(__u16 addr)
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{
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outb(addr & 0xff, 0x74);
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outb((addr >> 8) & 0xff, 0x75);
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return inb(0x76);
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}
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/* internal definitions for the SUS Click Map of memory */
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#define CLICK_ENTRIES 16
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#define CLICK_SIZE 4096 /* click to byte conversion for Length */
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typedef struct ClickMap {
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struct Entry {
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__u32 Address;
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__u32 Length;
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} Entry[CLICK_ENTRIES];
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} ClickMap_t;
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/* This routine is pretty much an awful hack to read the bios clickmap by
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* mapping it into page 0. There are usually three regions in the map:
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* Base Memory
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* Extended Memory
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* zero length marker for end of map
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*
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* Returns are 0 for failure and 1 for success on extracting region.
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*/
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int __init
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voyager_memory_detect(int region, __u32 *start, __u32 *length)
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{
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int i;
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int retval = 0;
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__u8 cmos[4];
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ClickMap_t *map;
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unsigned long map_addr;
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unsigned long old;
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if(region >= CLICK_ENTRIES) {
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printk("Voyager: Illegal ClickMap region %d\n", region);
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return 0;
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}
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for(i = 0; i < sizeof(cmos); i++)
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cmos[i] = voyager_extended_cmos_read(VOYAGER_MEMORY_CLICKMAP + i);
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map_addr = *(unsigned long *)cmos;
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/* steal page 0 for this */
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old = pg0[0];
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pg0[0] = ((map_addr & PAGE_MASK) | _PAGE_RW | _PAGE_PRESENT);
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local_flush_tlb();
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/* now clear everything out but page 0 */
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map = (ClickMap_t *)(map_addr & (~PAGE_MASK));
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/* zero length is the end of the clickmap */
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if(map->Entry[region].Length != 0) {
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*length = map->Entry[region].Length * CLICK_SIZE;
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*start = map->Entry[region].Address;
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retval = 1;
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}
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/* replace the mapping */
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pg0[0] = old;
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local_flush_tlb();
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return retval;
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}
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/* voyager specific handling code for timer interrupts. Used to hand
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* off the timer tick to the SMP code, since the VIC doesn't have an
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* internal timer (The QIC does, but that's another story). */
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void
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voyager_timer_interrupt(struct pt_regs *regs)
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{
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if((jiffies & 0x3ff) == 0) {
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/* There seems to be something flaky in either
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* hardware or software that is resetting the timer 0
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* count to something much higher than it should be
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* This seems to occur in the boot sequence, just
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* before root is mounted. Therefore, every 10
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* seconds or so, we sanity check the timer zero count
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* and kick it back to where it should be.
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*
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* FIXME: This is the most awful hack yet seen. I
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* should work out exactly what is interfering with
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* the timer count settings early in the boot sequence
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* and swiftly introduce it to something sharp and
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* pointy. */
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__u16 val;
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spin_lock(&i8253_lock);
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outb_p(0x00, 0x43);
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val = inb_p(0x40);
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val |= inb(0x40) << 8;
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spin_unlock(&i8253_lock);
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if(val > LATCH) {
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printk("\nVOYAGER: countdown timer value too high (%d), resetting\n\n", val);
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spin_lock(&i8253_lock);
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outb(0x34,0x43);
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outb_p(LATCH & 0xff , 0x40); /* LSB */
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outb(LATCH >> 8 , 0x40); /* MSB */
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spin_unlock(&i8253_lock);
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}
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}
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#ifdef CONFIG_SMP
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smp_vic_timer_interrupt(regs);
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#endif
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}
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void
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voyager_power_off(void)
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{
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printk("VOYAGER Power Off\n");
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if(voyager_level == 5) {
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voyager_cat_power_off();
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} else if(voyager_level == 4) {
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/* This doesn't apparently work on most L4 machines,
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* but the specs say to do this to get automatic power
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* off. Unfortunately, if it doesn't power off the
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* machine, it ends up doing a cold restart, which
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* isn't really intended, so comment out the code */
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#if 0
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int port;
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/* enable the voyager Configuration Space */
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outb((inb(VOYAGER_MC_SETUP) & 0xf0) | 0x8,
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VOYAGER_MC_SETUP);
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/* the port for the power off flag is an offset from the
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floating base */
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port = (inb(VOYAGER_SSPB_RELOCATION_PORT) << 8) + 0x21;
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/* set the power off flag */
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outb(inb(port) | 0x1, port);
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#endif
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}
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/* and wait for it to happen */
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for(;;) {
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__asm("cli");
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__asm("hlt");
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}
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}
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/* copied from process.c */
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static inline void
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kb_wait(void)
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{
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int i;
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for (i=0; i<0x10000; i++)
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if ((inb_p(0x64) & 0x02) == 0)
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break;
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}
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void
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machine_restart(char *cmd)
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{
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printk("Voyager Warm Restart\n");
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kb_wait();
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if(voyager_level == 5) {
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/* write magic values to the RTC to inform system that
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* shutdown is beginning */
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outb(0x8f, 0x70);
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outb(0x5 , 0x71);
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udelay(50);
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outb(0xfe,0x64); /* pull reset low */
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} else if(voyager_level == 4) {
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__u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT)<<8;
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__u8 basebd = inb(VOYAGER_MC_SETUP);
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outb(basebd | 0x08, VOYAGER_MC_SETUP);
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outb(0x02, catbase + 0x21);
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}
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for(;;) {
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asm("cli");
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asm("hlt");
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}
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}
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EXPORT_SYMBOL(machine_restart);
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void
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mca_nmi_hook(void)
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{
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__u8 dumpval __attribute__((unused)) = inb(0xf823);
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__u8 swnmi __attribute__((unused)) = inb(0xf813);
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/* FIXME: assume dump switch pressed */
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/* check to see if the dump switch was pressed */
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VDEBUG(("VOYAGER: dumpval = 0x%x, swnmi = 0x%x\n", dumpval, swnmi));
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/* clear swnmi */
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outb(0xff, 0xf813);
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/* tell SUS to ignore dump */
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if(voyager_level == 5 && voyager_SUS != NULL) {
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if(voyager_SUS->SUS_mbox == VOYAGER_DUMP_BUTTON_NMI) {
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voyager_SUS->kernel_mbox = VOYAGER_NO_COMMAND;
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voyager_SUS->kernel_flags |= VOYAGER_OS_IN_PROGRESS;
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udelay(1000);
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voyager_SUS->kernel_mbox = VOYAGER_IGNORE_DUMP;
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voyager_SUS->kernel_flags &= ~VOYAGER_OS_IN_PROGRESS;
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}
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}
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printk(KERN_ERR "VOYAGER: Dump switch pressed, printing CPU%d tracebacks\n", smp_processor_id());
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show_stack(NULL, NULL);
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show_state();
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}
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void
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machine_halt(void)
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{
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/* treat a halt like a power off */
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machine_power_off();
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}
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EXPORT_SYMBOL(machine_halt);
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void machine_power_off(void)
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{
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if (pm_power_off)
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pm_power_off();
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}
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EXPORT_SYMBOL(machine_power_off);
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