1 files changed, 325 insertions, 0 deletions
diff --git a/arch/i386/mach-voyager/voyager_basic.c b/arch/i386/mach-voyager/voyager_basic.c
new file mode 100644
index 00000000000..602aea240e9
--- /dev/null
+++ b/arch/i386/mach-voyager/voyager_basic.c
@@ -0,0 +1,325 @@
+/* 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/config.h>
+#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>
+#include <asm/io.h>
+#include <asm/voyager.h>
+#include <asm/vic.h>
+#include <linux/pm.h>
+#include <linux/irq.h>
+#include <asm/tlbflush.h>
+#include <asm/arch_hooks.h>
+
+/*
+ * Power off function, if any
+ */
+void (*pm_power_off)(void);
+
+int voyager_level = 0;
+
+struct voyager_SUS *voyager_SUS = NULL;
+
+#ifdef CONFIG_SMP
+static void
+voyager_dump(int dummy1, struct pt_regs *dummy2, struct tty_struct *dummy3)
+{
+	/* 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
+voyager_system_interrupt(int cpl, void *dev_id, struct pt_regs *regs)
+{
+	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
+voyager_timer_interrupt(struct pt_regs *regs)
+{
+	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;
+		extern spinlock_t i8253_lock;
+
+		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
+	smp_vic_timer_interrupt(regs);
+#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 */
+	for(;;) {
+		__asm("cli");
+		__asm("hlt");
+	}
+}
+
+/* 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;
+}
+
+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);
+	}
+	for(;;) {
+		asm("cli");
+		asm("hlt");
+	}
+}
+
+EXPORT_SYMBOL(machine_restart);
+
+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();
+}
+
+EXPORT_SYMBOL(machine_halt);
+
+void machine_power_off(void)
+{
+	if (pm_power_off)
+		pm_power_off();
+}
+
+EXPORT_SYMBOL(machine_power_off);