add support for PC-9800 architecture (core)

diff -urN linux/arch/i386/kernel/cpu/proc.c linux98/arch/i386/kernel/cpu/proc.c
@@ -76,7 +76,7 @@
 		seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
 	
 	/* We use exception 16 if we have hardware math and we've either seen it or the CPU claims it is internal */
-	fpu_exception = c->hard_math && (ignore_irq13 || cpu_has_fpu);
+	fpu_exception = c->hard_math && (ignore_fpu_irq || cpu_has_fpu);
 	seq_printf(m, "fdiv_bug\t: %s\n"
 			"hlt_bug\t\t: %s\n"
 			"f00f_bug\t: %s\n"

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diff -urN linux/arch/i386/kernel/reboot.c linux98/arch/i386/kernel/reboot.c
@@ -8,6 +8,7 @@
 #include <linux/interrupt.h>
 #include <linux/mc146818rtc.h>
 #include <asm/uaccess.h>
+#include "mach_reboot.h"
 
 /*
  * Power off function, if any

@@ -125,15 +126,6 @@
 	0xea, 0x00, 0x00, 0xff, 0xff		/*    ljmp  $0xffff,$0x0000  */
 };
 
-static inline void kb_wait(void)
-{
-	int i;
-
-	for (i=0; i<0x10000; i++)
-		if ((inb_p(0x64) & 0x02) == 0)
-			break;
-}
-
 /*
  * Switch to real mode and then execute the code
  * specified by the code and length parameters.

@@ -264,13 +256,7 @@
 		/* rebooting needs to touch the page at absolute addr 0 */
 		*((unsigned short *)__va(0x472)) = reboot_mode;
 		for (;;) {
-			int i;
-			for (i=0; i<100; i++) {
-				kb_wait();
-				udelay(50);
-				outb(0xfe,0x64);         /* pulse reset low */
-				udelay(50);
-			}
+			mach_reboot();
 			/* That didn't work - force a triple fault.. */
 			__asm__ __volatile__("lidt %0": :"m" (no_idt));
 			__asm__ __volatile__("int3");

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diff -urN linux/arch/i386/kernel/timers/timer_pit.c linux98/arch/i386/kernel/timers/timer_pit.c
@@ -13,6 +13,7 @@
 extern spinlock_t i8259A_lock;
 extern spinlock_t i8253_lock;
 #include "do_timer.h"
+#include "io_ports.h"
 
 static int init_pit(void)
 {

@@ -61,7 +62,8 @@
 {
 	int count;
 
-	static int count_p = LATCH;    /* for the first call after boot */
+	static int count_p;
+	static int is_1st_boot = 1;    /* for the first call after boot */
 	static unsigned long jiffies_p = 0;
 
 	/*

@@ -69,12 +71,18 @@
 	 */
 	unsigned long jiffies_t;
 
+	/* for support LATCH is not constant */
+	if (is_1st_boot) {
+		is_1st_boot = 0;
+		count_p = LATCH;
+	}
+
 	/* gets recalled with irq locally disabled */
 	spin_lock(&i8253_lock);
 	/* timer count may underflow right here */
-	outb_p(0x00, 0x43);	/* latch the count ASAP */
+	outb_p(0x00, PIT_MODE);	/* latch the count ASAP */
 
-	count = inb_p(0x40);	/* read the latched count */
+	count = inb_p(PIT_CH0);	/* read the latched count */
 
 	/*
 	 * We do this guaranteed double memory access instead of a _p 

@@ -82,13 +90,13 @@
 	 */
  	jiffies_t = jiffies;
 
-	count |= inb_p(0x40) << 8;
+	count |= inb_p(PIT_CH0) << 8;
 	
         /* VIA686a test code... reset the latch if count > max + 1 */
         if (count > LATCH) {
-                outb_p(0x34, 0x43);
-                outb_p(LATCH & 0xff, 0x40);
-                outb(LATCH >> 8, 0x40);
+                outb_p(0x34, PIT_MODE);
+                outb_p(LATCH & 0xff, PIT_CH0);
+                outb(LATCH >> 8, PIT_CH0);
                 count = LATCH - 1;
         }
 	

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diff -urN linux/arch/i386/kernel/traps.c linux98/arch/i386/kernel/traps.c
@@ -49,6 +49,8 @@
 #include <linux/irq.h>
 #include <linux/module.h>
 
+#include "mach_traps.h"
+
 asmlinkage int system_call(void);
 asmlinkage void lcall7(void);
 asmlinkage void lcall27(void);

@@ -449,11 +451,10 @@
 	printk("You probably have a hardware problem with your RAM chips\n");
 
 	/* Clear and disable the memory parity error line. */
-	reason = (reason & 0xf) | 4;
-	outb(reason, 0x61);
+	clear_mem_error(reason);
 }
 
-static void io_check_error(unsigned char reason, struct pt_regs * regs)
+static inline void io_check_error(unsigned char reason, struct pt_regs * regs)
 {
 	unsigned long i;
 

@@ -487,8 +488,9 @@
 
 static void default_do_nmi(struct pt_regs * regs)
 {
-	unsigned char reason = inb(0x61);
+	unsigned char reason;
  
+	reason = get_nmi_reason();
 	if (!(reason & 0xc0)) {
 #if CONFIG_X86_LOCAL_APIC
 		/*

@@ -506,15 +508,12 @@
 	if (reason & 0x80)
 		mem_parity_error(reason, regs);
 	if (reason & 0x40)
-		io_check_error(reason, regs);
+		HANDLE_REASON_0X40(reason, regs);
 	/*
 	 * Reassert NMI in case it became active meanwhile
 	 * as it's edge-triggered.
 	 */
-	outb(0x8f, 0x70);
-	inb(0x71);		/* dummy */
-	outb(0x0f, 0x70);
-	inb(0x71);		/* dummy */
+	reassert_nmi();
 }
 
 static int dummy_nmi_callback(struct pt_regs * regs, int cpu)

@@ -697,7 +696,7 @@
 
 asmlinkage void do_coprocessor_error(struct pt_regs * regs, long error_code)
 {
-	ignore_irq13 = 1;
+	ignore_fpu_irq = 1;
 	math_error((void *)regs->eip);
 }
 

@@ -754,7 +753,7 @@
 {
 	if (cpu_has_xmm) {
 		/* Handle SIMD FPU exceptions on PIII+ processors. */
-		ignore_irq13 = 1;
+		ignore_fpu_irq = 1;
 		simd_math_error((void *)regs->eip);
 	} else {
 		/*

diff -urN linux/arch/i386/kernel/vm86.c linux98/arch/i386/kernel/vm86.c
@@ -30,6 +30,7 @@
  *
  */
 
+#include <linux/config.h>
 #include <linux/errno.h>
 #include <linux/sched.h>
 #include <linux/kernel.h>

@@ -732,10 +733,22 @@
 		free_vm86_irq(i);
 }
 
+#ifndef CONFIG_PC9800
+# define ILLEGAL_IRQ(irq) ((irq) < 3 || (irq) > 15)
+# define FIRST_VM86_IRQ	3
+#else
+/*
+ * On PC-9800, slave PIC is wired master PIC's IR7,
+ * so that we don't allow vm86 to grab IRQ7.
+ */
+# define ILLEGAL_IRQ(irq) ((irq) < 2 || (irq) == 7 || (irq) > 15)
+# define FIRST_VM86_IRQ	2
+#endif
+
 static inline void handle_irq_zombies(void)
 {
 	int i;
-	for (i=3; i<16; i++) {
+	for (i=FIRST_VM86_IRQ; i<16; i++) {
 		if (vm86_irqs[i].tsk) {
 			if (task_valid(vm86_irqs[i].tsk)) continue;
 			free_vm86_irq(i);

@@ -748,7 +761,7 @@
 	int bit;
 	unsigned long flags;
 	
-	if ( (irqnumber<3) || (irqnumber>15) ) return 0;
+	if (ILLEGAL_IRQ(irqnumber)) return 0;
 	if (vm86_irqs[irqnumber].tsk != current) return 0;
 	spin_lock_irqsave(&irqbits_lock, flags);	
 	bit = irqbits & (1 << irqnumber);

@@ -774,7 +787,7 @@
 			handle_irq_zombies();
 			if (!capable(CAP_SYS_ADMIN)) return -EPERM;
 			if (!((1 << sig) & ALLOWED_SIGS)) return -EPERM;
-			if ( (irq<3) || (irq>15) ) return -EPERM;
+			if (ILLEGAL_IRQ(irq)) return -EPERM;
 			if (vm86_irqs[irq].tsk) return -EPERM;
 			ret = request_irq(irq, &irq_handler, 0, VM86_IRQNAME, 0);
 			if (ret) return ret;

@@ -784,7 +797,7 @@
 		}
 		case  VM86_FREE_IRQ: {
 			handle_irq_zombies();
-			if ( (irqnumber<3) || (irqnumber>15) ) return -EPERM;
+			if (ILLEGAL_IRQ(irqnumber)) return -EPERM;
 			if (!vm86_irqs[irqnumber].tsk) return 0;
 			if (vm86_irqs[irqnumber].tsk != current) return -EPERM;
 			free_vm86_irq(irqnumber);

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diff -urN linux/arch/i386/mach-generic/io_ports.h linux98/arch/i386/mach-generic/io_ports.h
@@ -0,0 +1,30 @@
+/*
+ *  arch/i386/mach-generic/io_ports.h
+ *
+ *  Machine specific IO port address definition for generic.
+ *  Written by Osamu Tomita <[email protected]>
+ */
+#ifndef _MACH_IO_PORTS_H
+#define _MACH_IO_PORTS_H
+
+/* i8253A PIT registers */
+#define PIT_MODE		0x43
+#define PIT_CH0			0x40
+#define PIT_CH2			0x42
+
+/* i8259A PIC registers */
+#define PIC_MASTER_CMD		0x20
+#define PIC_MASTER_IMR		0x21
+#define PIC_MASTER_ISR		PIC_MASTER_CMD
+#define PIC_MASTER_POLL		PIC_MASTER_ISR
+#define PIC_MASTER_OCW3		PIC_MASTER_ISR
+#define PIC_SLAVE_CMD		0xa0
+#define PIC_SLAVE_IMR		0xa1
+
+/* i8259A PIC related value */
+#define PIC_CASCADE_IR		2
+#define MASTER_ICW4_DEFAULT	0x01
+#define SLAVE_ICW4_DEFAULT	0x01
+#define PIC_ICW4_AEOI		2
+
+#endif /* !_MACH_IO_PORTS_H */

diff -urN linux/arch/i386/mach-generic/mach_reboot.h linux98/arch/i386/mach-generic/mach_reboot.h
@@ -0,0 +1,30 @@
+/*
+ *  arch/i386/mach-generic/mach_reboot.h
+ *
+ *  Machine specific reboot functions for generic.
+ *  Split out from reboot.c by Osamu Tomita <[email protected]>
+ */
+#ifndef _MACH_REBOOT_H
+#define _MACH_REBOOT_H
+
+static inline void kb_wait(void)
+{
+	int i;
+
+	for (i = 0; i < 0x10000; i++)
+		if ((inb_p(0x64) & 0x02) == 0)
+			break;
+}
+
+static inline void mach_reboot(void)
+{
+	int i;
+	for (i = 0; i < 100; i++) {
+		kb_wait();
+		udelay(50);
+		outb(0xfe, 0x64);         /* pulse reset low */
+		udelay(50);
+	}
+}
+
+#endif /* !_MACH_REBOOT_H */

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diff -urN linux/arch/i386/mach-generic/mach_traps.h linux98/arch/i386/mach-generic/mach_traps.h
@@ -0,0 +1,31 @@
+/*
+ *  arch/i386/mach-generic/mach_traps.h
+ *
+ *  Machine specific NMI handling for generic.
+ *  Split out from traps.c by Osamu Tomita <[email protected]>
+ */
+#ifndef _MACH_TRAPS_H
+#define _MACH_TRAPS_H
+
+#define HANDLE_REASON_0X40(reason, regs) io_check_error(reason, regs)
+
+static inline void clear_mem_error(unsigned char reason)
+{
+	reason = (reason & 0xf) | 4;
+	outb(reason, 0x61);
+}
+
+static inline unsigned char get_nmi_reason(void)
+{
+	return inb(0x61);
+}
+
+static inline void reassert_nmi(void)
+{
+	outb(0x8f, 0x70);
+	inb(0x71);		/* dummy */
+	outb(0x0f, 0x70);
+	inb(0x71);		/* dummy */
+}
+
+#endif /* !_MACH_TRAPS_H */

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diff -urN linux/arch/i386/mach-pc9800/entry_arch.h linux98/arch/i386/mach-pc9800/entry_arch.h
@@ -0,0 +1 @@
+#include "../mach-generic/entry_arch.h"

diff -urN linux/arch/i386/mach-pc9800/io_ports.h linux98/arch/i386/mach-pc9800/io_ports.h
@@ -0,0 +1,30 @@
+/*
+ *  arch/i386/mach-pc9800/io_ports.h
+ *
+ *  Machine specific IO port address definition for PC-9800.
+ *  Written by Osamu Tomita <[email protected]>
+ */
+#ifndef _MACH_IO_PORTS_H
+#define _MACH_IO_PORTS_H
+
+/* i8253A PIT registers */
+#define PIT_MODE		0x77
+#define PIT_CH0			0x71
+#define PIT_CH2			0x75
+
+/* i8259A PIC registers */
+#define PIC_MASTER_CMD		0x00
+#define PIC_MASTER_IMR		0x02
+#define PIC_MASTER_ISR		PIC_MASTER_CMD
+#define PIC_MASTER_POLL		PIC_MASTER_ISR
+#define PIC_MASTER_OCW3		PIC_MASTER_ISR
+#define PIC_SLAVE_CMD		0x08
+#define PIC_SLAVE_IMR		0x0a
+
+/* i8259A PIC related values */
+#define PIC_CASCADE_IR		7
+#define MASTER_ICW4_DEFAULT	0x1d
+#define SLAVE_ICW4_DEFAULT	0x09
+#define PIC_ICW4_AEOI		0x02
+
+#endif /* !_MACH_IO_PORTS_H */

diff -urN linux/arch/i386/mach-pc9800/irq_vectors.h linux98/arch/i386/mach-pc9800/irq_vectors.h
@@ -0,0 +1 @@
+#include "../mach-generic/irq_vectors.h"

diff -urN linux/arch/i386/mach-pc9800/mach_apic.h linux98/arch/i386/mach-pc9800/mach_apic.h
@@ -0,0 +1 @@
+#include "../mach-generic/mach_apic.h"

diff -urN linux/arch/i386/mach-pc9800/mach_reboot.h linux98/arch/i386/mach-pc9800/mach_reboot.h
@@ -0,0 +1,21 @@
+/*
+ *  arch/i386/mach-pc9800/mach_reboot.h
+ *
+ *  Machine specific reboot functions for PC-9800.
+ *  Written by Osamu Tomita <[email protected]>
+ */
+#ifndef _MACH_REBOOT_H
+#define _MACH_REBOOT_H
+
+#ifdef CMOS_WRITE
+#undef CMOS_WRITE
+#define CMOS_WRITE(a,b)	do{}while(0)
+#endif
+
+static inline void mach_reboot(void)
+{
+	outb(0, 0xf0);		/* signal CPU reset */
+	mdelay(1);
+}
+
+#endif /* !_MACH_REBOOT_H */

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diff -urN linux/arch/i386/mach-pc9800/mach_traps.h linux98/arch/i386/mach-pc9800/mach_traps.h
@@ -0,0 +1,29 @@
+/*
+ *  arch/i386/mach-pc9800/mach_traps.h
+ *
+ *  Machine specific NMI handling for PC-9800.
+ *  Written by Osamu Tomita <[email protected]>
+ */
+#ifndef _MACH_TRAPS_H
+#define _MACH_TRAPS_H
+
+#define HANDLE_REASON_0X40(reason, regs) mem_parity_error(reason, regs)
+
+static inline void clear_mem_error(unsigned char reason)
+{
+	outb(0x08, 0x37);
+	outb(0x09, 0x37);
+}
+
+static inline unsigned char get_nmi_reason(void)
+{
+	return inb(0x33) << 5;
+}
+
+static inline void reassert_nmi(void)
+{
+	outb(0x09, 0x50);	/* disable NMI once */
+	outb(0x09, 0x52);	/* re-enable it */
+}
+
+#endif /* !_MACH_TRAPS_H */

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diff -urN linux/arch/i386/mach-pc9800/setup_arch_post.h linux98/arch/i386/mach-pc9800/setup_arch_post.h
@@ -0,0 +1,29 @@
+/**
+ * machine_specific_memory_setup - Hook for machine specific memory setup.
+ *
+ * Description:
+ *	This is included late in kernel/setup.c so that it can make
+ *	use of all of the static functions.
+ **/
+
+static inline char * __init machine_specific_memory_setup(void)
+{
+	char *who;
+	unsigned long low_mem_size, lower_high, higher_high;
+
+
+	who = "BIOS (common area)";
+
+	low_mem_size = ((*(unsigned char *)__va(PC9800SCA_BIOS_FLAG) & 7) + 1) << 17;
+	add_memory_region(0, low_mem_size, 1);
+	lower_high = (__u32) *(__u8 *) bus_to_virt(PC9800SCA_EXPMMSZ) << 17;
+	higher_high = (__u32) *(__u16 *) bus_to_virt(PC9800SCA_MMSZ16M) << 20;
+	if (lower_high != 0x00f00000UL) {
+		add_memory_region(HIGH_MEMORY, lower_high, 1);
+		add_memory_region(0x01000000UL, higher_high, 1);
+	}
+	else
+		add_memory_region(HIGH_MEMORY, lower_high + higher_high, 1);
+
+	return who;
+}

diff -urN linux/arch/i386/mach-pc9800/setup_arch_pre.h linux98/arch/i386/mach-pc9800/setup_arch_pre.h
@@ -0,0 +1,36 @@
+/* Hook to call BIOS initialisation function */
+
+/* no action for generic */
+
+#define ARCH_SETUP arch_setup_pc9800();
+
+#include <linux/timex.h>
+#include <asm/io.h>
+#include <asm/pc9800.h>
+#include <asm/pc9800_sca.h>
+
+int CLOCK_TICK_RATE;
+unsigned long tick_usec;	/* ACTHZ          period (usec) */
+unsigned long tick_nsec;	/* USER_HZ period (nsec) */
+unsigned char pc9800_misc_flags;
+/* (bit 0) 1:High Address Video ram exists 0:otherwise */
+
+#ifdef CONFIG_SMP
+#define MPC_TABLE_SIZE 512
+#define MPC_TABLE ((char *) (PARAM+0x400))
+char mpc_table[MPC_TABLE_SIZE];
+#endif
+
+static  inline void arch_setup_pc9800(void)
+{
+	CLOCK_TICK_RATE = PC9800_8MHz_P() ? 1996800 : 2457600;
+	printk(KERN_DEBUG "CLOCK_TICK_RATE = %d\n", CLOCK_TICK_RATE);
+	tick_usec = TICK_USEC; 		/* ACTHZ          period (usec) */
+	tick_nsec = TICK_NSEC(TICK_USEC);	/* USER_HZ period (nsec) */
+
+	pc9800_misc_flags = PC9800_MISC_FLAGS;
+#ifdef CONFIG_SMP
+	if ((*(u32 *)(MPC_TABLE)) == 0x504d4350)
+		memcpy(mpc_table, MPC_TABLE, *(u16 *)(MPC_TABLE + 4));
+#endif /* CONFIG_SMP */
+}

diff -urN linux/arch/i386/mach-pc9800/smpboot_hooks.h linux98/arch/i386/mach-pc9800/smpboot_hooks.h
@@ -0,0 +1,33 @@
+/* two abstractions specific to kernel/smpboot.c, mainly to cater to visws
+ * which needs to alter them. */
+
+static inline void smpboot_clear_io_apic_irqs(void)
+{
+	io_apic_irqs = 0;
+}
+
+static inline void smpboot_setup_warm_reset_vector(void)
+{
+	/*
+	 * Install writable page 0 entry to set BIOS data area.
+	 */
+	local_flush_tlb();
+
+	/*
+	 * Paranoid:  Set warm reset code and vector here back
+	 * to default values.
+	 */
+	outb(0x0f, 0x37);	/* SHUT0 = 1 */
+
+	*((volatile long *) phys_to_virt(0x404)) = 0;
+}
+
+static inline void smpboot_setup_io_apic(void)
+{
+	/*
+	 * Here we can be sure that there is an IO-APIC in the system. Let's
+	 * go and set it up:
+	 */
+	if (!skip_ioapic_setup && nr_ioapics)
+		setup_IO_APIC();
+}

diff -urN linux/arch/i386/mach-summit/calibrate_tsc.h linux98/arch/i386/mach-summit/calibrate_tsc.h
@@ -0,0 +1 @@
+#include "../mach-generic/calibrate_tsc.h"

diff -urN linux/arch/i386/mach-summit/io_ports.h linux98/arch/i386/mach-summit/io_ports.h
@@ -0,0 +1 @@
+#include "../mach-generic/io_ports.h"

diff -urN linux/arch/i386/mach-summit/mach_reboot.h linux98/arch/i386/mach-summit/mach_reboot.h
@@ -0,0 +1 @@
+#include "../mach-generic/mach_reboot.h"

diff -urN linux/arch/i386/mach-summit/mach_resources.h linux98/arch/i386/mach-summit/mach_resources.h
@@ -0,0 +1 @@
+#include "../mach-generic/mach_resources.h"

diff -urN linux/arch/i386/mach-summit/mach_time.h linux98/arch/i386/mach-summit/mach_time.h
@@ -0,0 +1 @@
+#include "../mach-generic/mach_time.h"

diff -urN linux/arch/i386/mach-summit/mach_traps.h linux98/arch/i386/mach-summit/mach_traps.h
@@ -0,0 +1 @@
+#include "../mach-generic/mach_traps.h"

diff -urN linux/arch/i386/mach-visws/calibrate_tsc.h linux98/arch/i386/mach-visws/calibrate_tsc.h
@@ -0,0 +1 @@
+#include "../mach-generic/calibrate_tsc.h"

diff -urN linux/arch/i386/mach-visws/io_ports.h linux98/arch/i386/mach-visws/io_ports.h
@@ -0,0 +1 @@
+#include "../mach-generic/io_ports.h"

diff -urN linux/arch/i386/mach-visws/mach_reboot.h linux98/arch/i386/mach-visws/mach_reboot.h
@@ -0,0 +1 @@
+#include "../mach-generic/mach_reboot.h"

diff -urN linux/arch/i386/mach-visws/mach_resources.h linux98/arch/i386/mach-visws/mach_resources.h
@@ -0,0 +1 @@
+#include "../mach-generic/mach_resources.h"

diff -urN linux/arch/i386/mach-visws/mach_time.h linux98/arch/i386/mach-visws/mach_time.h
@@ -0,0 +1 @@
+#include "../mach-generic/mach_time.h"

diff -urN linux/arch/i386/mach-visws/mach_traps.h linux98/arch/i386/mach-visws/mach_traps.h
@@ -0,0 +1 @@
+#include "../mach-generic/mach_traps.h"