7 files changed, 673 insertions, 0 deletions

diff --git a/arch/m68k/hp300/Makefile b/arch/m68k/hp300/Makefile
new file mode 100644
index 000000000..d87376156
--- /dev/null
+++ b/arch/m68k/hp300/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for Linux arch/m68k/hp300 source directory
+#
+
+obj-y		:= config.o time.o reboot.o
diff --git a/arch/m68k/hp300/README.hp300 b/arch/m68k/hp300/README.hp300
new file mode 100644
index 000000000..47073fbd4
--- /dev/null
+++ b/arch/m68k/hp300/README.hp300
@@ -0,0 +1,14 @@
+HP300 notes
+-----------
+
+The Linux/HP web page is at <http://www.tazenda.demon.co.uk/phil/linux-hp/>
+
+Currently only 9000/340 machines have been tested.  Any amount of RAM should
+work now but I've only tried 16MB and 12MB.
+
+The serial console is probably broken at the moment but the Topcat/HIL keyboard
+combination seems to work for me.  Your mileage may vary.
+
+The LANCE driver works after a fashion but only if you reset the chip before
+every packet.  This doesn't make for very speedy operation.
+
diff --git a/arch/m68k/hp300/config.c b/arch/m68k/hp300/config.c
new file mode 100644
index 000000000..e4bd6913f
--- /dev/null
+++ b/arch/m68k/hp300/config.c
@@ -0,0 +1,269 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  linux/arch/m68k/hp300/config.c
+ *
+ *  Copyright (C) 1998 Philip Blundell <philb@gnu.org>
+ *
+ *  This file contains the HP300-specific initialisation code.  It gets
+ *  called by setup.c.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/console.h>
+#include <linux/rtc.h>
+
+#include <asm/bootinfo.h>
+#include <asm/bootinfo-hp300.h>
+#include <asm/byteorder.h>
+#include <asm/machdep.h>
+#include <asm/blinken.h>
+#include <asm/io.h>                               /* readb() and writeb() */
+#include <asm/hp300hw.h>
+#include <asm/config.h>
+
+#include "time.h"
+
+unsigned long hp300_model;
+unsigned long hp300_uart_scode = -1;
+unsigned char hp300_ledstate;
+EXPORT_SYMBOL(hp300_ledstate);
+
+static char s_hp330[] __initdata = "330";
+static char s_hp340[] __initdata = "340";
+static char s_hp345[] __initdata = "345";
+static char s_hp360[] __initdata = "360";
+static char s_hp370[] __initdata = "370";
+static char s_hp375[] __initdata = "375";
+static char s_hp380[] __initdata = "380";
+static char s_hp385[] __initdata = "385";
+static char s_hp400[] __initdata = "400";
+static char s_hp425t[] __initdata = "425t";
+static char s_hp425s[] __initdata = "425s";
+static char s_hp425e[] __initdata = "425e";
+static char s_hp433t[] __initdata = "433t";
+static char s_hp433s[] __initdata = "433s";
+static char *hp300_models[] __initdata = {
+	[HP_320]	= NULL,
+	[HP_330]	= s_hp330,
+	[HP_340]	= s_hp340,
+	[HP_345]	= s_hp345,
+	[HP_350]	= NULL,
+	[HP_360]	= s_hp360,
+	[HP_370]	= s_hp370,
+	[HP_375]	= s_hp375,
+	[HP_380]	= s_hp380,
+	[HP_385]	= s_hp385,
+	[HP_400]	= s_hp400,
+	[HP_425T]	= s_hp425t,
+	[HP_425S]	= s_hp425s,
+	[HP_425E]	= s_hp425e,
+	[HP_433T]	= s_hp433t,
+	[HP_433S]	= s_hp433s,
+};
+
+static char hp300_model_name[13] = "HP9000/";
+
+extern void hp300_reset(void);
+#ifdef CONFIG_SERIAL_8250_CONSOLE
+extern int hp300_setup_serial_console(void) __init;
+#endif
+
+int __init hp300_parse_bootinfo(const struct bi_record *record)
+{
+	int unknown = 0;
+	const void *data = record->data;
+
+	switch (be16_to_cpu(record->tag)) {
+	case BI_HP300_MODEL:
+		hp300_model = be32_to_cpup(data);
+		break;
+
+	case BI_HP300_UART_SCODE:
+		hp300_uart_scode = be32_to_cpup(data);
+		break;
+
+	case BI_HP300_UART_ADDR:
+		/* serial port address: ignored here */
+		break;
+
+	default:
+		unknown = 1;
+	}
+
+	return unknown;
+}
+
+#ifdef CONFIG_HEARTBEAT
+static void hp300_pulse(int x)
+{
+	if (x)
+		blinken_leds(0x10, 0);
+	else
+		blinken_leds(0, 0x10);
+}
+#endif
+
+static void hp300_get_model(char *model)
+{
+	strcpy(model, hp300_model_name);
+}
+
+#define RTCBASE			0xf0420000
+#define RTC_DATA		0x1
+#define RTC_CMD			0x3
+
+#define	RTC_BUSY		0x02
+#define	RTC_DATA_RDY		0x01
+
+#define rtc_busy()		(in_8(RTCBASE + RTC_CMD) & RTC_BUSY)
+#define rtc_data_available()	(in_8(RTCBASE + RTC_CMD) & RTC_DATA_RDY)
+#define rtc_status()		(in_8(RTCBASE + RTC_CMD))
+#define rtc_command(x)		out_8(RTCBASE + RTC_CMD, (x))
+#define rtc_read_data()		(in_8(RTCBASE + RTC_DATA))
+#define rtc_write_data(x)	out_8(RTCBASE + RTC_DATA, (x))
+
+#define RTC_SETREG	0xe0
+#define RTC_WRITEREG	0xc2
+#define RTC_READREG	0xc3
+
+#define RTC_REG_SEC2	0
+#define RTC_REG_SEC1	1
+#define RTC_REG_MIN2	2
+#define RTC_REG_MIN1	3
+#define RTC_REG_HOUR2	4
+#define RTC_REG_HOUR1	5
+#define RTC_REG_WDAY	6
+#define RTC_REG_DAY2	7
+#define RTC_REG_DAY1	8
+#define RTC_REG_MON2	9
+#define RTC_REG_MON1	10
+#define RTC_REG_YEAR2	11
+#define RTC_REG_YEAR1	12
+
+#define RTC_HOUR1_24HMODE 0x8
+
+#define RTC_STAT_MASK	0xf0
+#define RTC_STAT_RDY	0x40
+
+static inline unsigned char hp300_rtc_read(unsigned char reg)
+{
+	unsigned char s, ret;
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+	while (rtc_busy());
+	rtc_command(RTC_SETREG);
+	while (rtc_busy());
+	rtc_write_data(reg);
+	while (rtc_busy());
+	rtc_command(RTC_READREG);
+
+	do {
+		while (!rtc_data_available());
+		s = rtc_status();
+		ret = rtc_read_data();
+	} while ((s & RTC_STAT_MASK) != RTC_STAT_RDY);
+
+	local_irq_restore(flags);
+
+	return ret;
+}
+
+static inline unsigned char hp300_rtc_write(unsigned char reg,
+					    unsigned char val)
+{
+	unsigned char s, ret;
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+	while (rtc_busy());
+	rtc_command(RTC_SETREG);
+	while (rtc_busy());
+	rtc_write_data((val << 4) | reg);
+	while (rtc_busy());
+	rtc_command(RTC_WRITEREG);
+	while (rtc_busy());
+	rtc_command(RTC_READREG);
+
+	do {
+		while (!rtc_data_available());
+		s = rtc_status();
+		ret = rtc_read_data();
+	} while ((s & RTC_STAT_MASK) != RTC_STAT_RDY);
+
+	local_irq_restore(flags);
+
+	return ret;
+}
+
+static int hp300_hwclk(int op, struct rtc_time *t)
+{
+	if (!op) { /* read */
+		t->tm_sec  = hp300_rtc_read(RTC_REG_SEC1) * 10 +
+			hp300_rtc_read(RTC_REG_SEC2);
+		t->tm_min  = hp300_rtc_read(RTC_REG_MIN1) * 10 +
+			hp300_rtc_read(RTC_REG_MIN2);
+		t->tm_hour = (hp300_rtc_read(RTC_REG_HOUR1) & 3) * 10 +
+			hp300_rtc_read(RTC_REG_HOUR2);
+		t->tm_wday = -1;
+		t->tm_mday = hp300_rtc_read(RTC_REG_DAY1) * 10 +
+			hp300_rtc_read(RTC_REG_DAY2);
+		t->tm_mon  = hp300_rtc_read(RTC_REG_MON1) * 10 +
+			hp300_rtc_read(RTC_REG_MON2) - 1;
+		t->tm_year = hp300_rtc_read(RTC_REG_YEAR1) * 10 +
+			hp300_rtc_read(RTC_REG_YEAR2);
+		if (t->tm_year <= 69)
+			t->tm_year += 100;
+	} else {
+		hp300_rtc_write(RTC_REG_SEC1, t->tm_sec / 10);
+		hp300_rtc_write(RTC_REG_SEC2, t->tm_sec % 10);
+		hp300_rtc_write(RTC_REG_MIN1, t->tm_min / 10);
+		hp300_rtc_write(RTC_REG_MIN2, t->tm_min % 10);
+		hp300_rtc_write(RTC_REG_HOUR1,
+				((t->tm_hour / 10) & 3) | RTC_HOUR1_24HMODE);
+		hp300_rtc_write(RTC_REG_HOUR2, t->tm_hour % 10);
+		hp300_rtc_write(RTC_REG_DAY1, t->tm_mday / 10);
+		hp300_rtc_write(RTC_REG_DAY2, t->tm_mday % 10);
+		hp300_rtc_write(RTC_REG_MON1, (t->tm_mon + 1) / 10);
+		hp300_rtc_write(RTC_REG_MON2, (t->tm_mon + 1) % 10);
+		if (t->tm_year >= 100)
+			t->tm_year -= 100;
+		hp300_rtc_write(RTC_REG_YEAR1, t->tm_year / 10);
+		hp300_rtc_write(RTC_REG_YEAR2, t->tm_year % 10);
+	}
+
+	return 0;
+}
+
+static void __init hp300_init_IRQ(void)
+{
+}
+
+void __init config_hp300(void)
+{
+	mach_sched_init      = hp300_sched_init;
+	mach_init_IRQ        = hp300_init_IRQ;
+	mach_get_model       = hp300_get_model;
+	mach_hwclk	     = hp300_hwclk;
+	mach_reset           = hp300_reset;
+#ifdef CONFIG_HEARTBEAT
+	mach_heartbeat       = hp300_pulse;
+#endif
+
+	if (hp300_model >= HP_330 && hp300_model <= HP_433S &&
+	    hp300_model != HP_350) {
+		pr_info("Detected HP9000 model %s\n",
+			hp300_models[hp300_model-HP_320]);
+		strcat(hp300_model_name, hp300_models[hp300_model-HP_320]);
+	} else {
+		panic("Unknown HP9000 Model");
+	}
+#ifdef CONFIG_SERIAL_8250_CONSOLE
+	hp300_setup_serial_console();
+#endif
+}
diff --git a/arch/m68k/hp300/hp300map.map b/arch/m68k/hp300/hp300map.map
new file mode 100644
index 000000000..6b45f0abc
--- /dev/null
+++ b/arch/m68k/hp300/hp300map.map
@@ -0,0 +1,252 @@
+# HP300 kernel keymap. This uses 7 modifier combinations.
+keymaps 0-2,4-5,8,12
+# Change the above line into
+#	keymaps 0-2,4-6,8,12
+# in case you want the entries
+#	altgr   control keycode  83 = Boot
+#	altgr   control keycode 111 = Boot
+# below.
+#
+# In fact AltGr is used very little, and one more keymap can
+# be saved by mapping AltGr to Alt (and adapting a few entries):
+# keycode 100 = Alt
+#
+keycode   1 =
+keycode   2 = Alt
+keycode   3 = Alt
+keycode   4 = Shift
+keycode   5 = Shift
+keycode   6 = Control
+keycode   7 =
+keycode   8 =
+keycode   9 =
+keycode  10 =
+keycode  11 =
+keycode  12 =
+keycode  13 =
+keycode  14 =
+keycode  15 =
+keycode  16 =
+keycode  17 =
+keycode  18 =
+keycode  19 =
+keycode  20 =
+keycode  21 =
+keycode  22 =
+keycode  23 =
+keycode  24 = b
+keycode  25 = v
+keycode  26 = c
+keycode  27 = x
+keycode  28 = z
+keycode  29 =
+keycode  30 =
+keycode  31 = Escape		Delete
+keycode  32 =
+keycode  33 =
+keycode  34 =
+keycode  35 =
+keycode  36 =
+keycode  37 =
+keycode  38 =
+keycode  39 =
+keycode  40 = h
+keycode  41 = g
+keycode  42 = f
+keycode  43 = d
+keycode  44 = s
+keycode  45 = a
+keycode  46 =
+keycode  47 = Caps_Lock
+keycode  48 = u
+keycode  49 = y
+keycode  50 = t
+keycode  51 = r
+keycode  52 = e
+keycode  53 = w
+keycode  54 = q
+keycode  55 = Tab		Tab
+	alt     keycode    55 = Meta_Tab
+keycode  56 = seven		ampersand
+keycode  57 = six		asciicircum
+keycode  58 = five		percent
+keycode  59 = four		dollar
+keycode  60 = three		numbersign
+keycode  61 = two		at		at
+keycode  62 = one		exclam		exclam
+keycode  63 = grave		asciitilde
+	control keycode    63 = nul
+	alt     keycode    63 = Meta_grave
+keycode  64 =
+keycode  65 =
+keycode  66 =
+keycode  67 =
+keycode  68 =
+keycode  69 =
+keycode  70 =
+keycode  71 =
+keycode  72 =
+keycode  73 = F4
+	control keycode	   73 = Console_4
+keycode  74 = F3
+	control keycode	   74 = Console_3
+keycode  75 = F2
+	control keycode	   75 = Console_2
+keycode  76 = F1
+	control keycode	   76 = Console_1
+keycode  77 =
+keycode  78 =
+keycode  79 =
+keycode  80 =
+keycode  81 = F5
+	control keycode	   81 = Console_5
+keycode  82 = F6
+	control keycode	   82 = Console_6
+keycode  83 = F7
+	control keycode	   83 = Console_7
+keycode  84 = F8
+	control keycode	   84 = Console_8
+keycode  85 =
+keycode  86 =
+keycode  87 =
+keycode  88 = eight		asterisk	asterisk
+keycode  89 = nine		parenleft	bracketleft
+keycode  90 = zero		parenright	bracketright
+keycode  91 = minus		underscore
+keycode  92 = equal		plus
+keycode  93 = BackSpace
+keycode  94 =
+keycode  95 =
+keycode  96 = i
+keycode  97 = o
+keycode  98 = p
+keycode  99 = bracketleft	braceleft
+keycode 100 = bracketright	braceright
+keycode 101 = backslash		bar
+	control keycode   101 = Control_backslash
+	alt     keycode   101 = Meta_backslash
+keycode 102 =
+keycode 103 =
+keycode 104 = j
+keycode 105 = k
+keycode 106 = l
+keycode 107 = semicolon		colon
+	alt     keycode   107 = Meta_semicolon
+keycode 108 = apostrophe	quotedbl
+	control keycode   108 = Control_g
+	alt     keycode   108 = Meta_apostrophe
+keycode 109 = Return
+keycode 110 =
+keycode 111 =
+keycode 112 = m
+keycode 113 = comma		less
+keycode 114 = period		greater
+keycode 115 = slash		question
+keycode 116 =
+keycode 117 =
+keycode 118 =
+keycode 119 =
+keycode 120 = n
+keycode 121 = space		space
+keycode 122 =
+keycode 123 =
+keycode 124 = Left
+keycode 125 = Down
+keycode 126 = Up
+keycode 127 = Right
+string F1 = "\033[[A"
+string F2 = "\033[[B"
+string F3 = "\033[[C"
+string F4 = "\033[[D"
+string F5 = "\033[[E"
+string F6 = "\033[17~"
+string F7 = "\033[18~"
+string F8 = "\033[19~"
+string F9 = "\033[20~"
+string F10 = "\033[21~"
+string F11 = "\033[23~"
+string F12 = "\033[24~"
+string F13 = "\033[25~"
+string F14 = "\033[26~"
+string F15 = "\033[28~"
+string F16 = "\033[29~"
+string F17 = "\033[31~"
+string F18 = "\033[32~"
+string F19 = "\033[33~"
+string F20 = "\033[34~"
+string Find = "\033[1~"
+string Insert = "\033[2~"
+string Remove = "\033[3~"
+string Select = "\033[4~"
+string Prior = "\033[5~"
+string Next = "\033[6~"
+string Macro = "\033[M"
+string Pause = "\033[P"
+compose '`' 'A' to 'À'
+compose '`' 'a' to 'à'
+compose '\'' 'A' to 'Á'
+compose '\'' 'a' to 'á'
+compose '^' 'A' to 'Â'
+compose '^' 'a' to 'â'
+compose '~' 'A' to 'Ã'
+compose '~' 'a' to 'ã'
+compose '"' 'A' to 'Ä'
+compose '"' 'a' to 'ä'
+compose 'O' 'A' to 'Å'
+compose 'o' 'a' to 'å'
+compose '0' 'A' to 'Å'
+compose '0' 'a' to 'å'
+compose 'A' 'A' to 'Å'
+compose 'a' 'a' to 'å'
+compose 'A' 'E' to 'Æ'
+compose 'a' 'e' to 'æ'
+compose ',' 'C' to 'Ç'
+compose ',' 'c' to 'ç'
+compose '`' 'E' to 'È'
+compose '`' 'e' to 'è'
+compose '\'' 'E' to 'É'
+compose '\'' 'e' to 'é'
+compose '^' 'E' to 'Ê'
+compose '^' 'e' to 'ê'
+compose '"' 'E' to 'Ë'
+compose '"' 'e' to 'ë'
+compose '`' 'I' to 'Ì'
+compose '`' 'i' to 'ì'
+compose '\'' 'I' to 'Í'
+compose '\'' 'i' to 'í'
+compose '^' 'I' to 'Î'
+compose '^' 'i' to 'î'
+compose '"' 'I' to 'Ï'
+compose '"' 'i' to 'ï'
+compose '-' 'D' to 'Ð'
+compose '-' 'd' to 'ð'
+compose '~' 'N' to 'Ñ'
+compose '~' 'n' to 'ñ'
+compose '`' 'O' to 'Ò'
+compose '`' 'o' to 'ò'
+compose '\'' 'O' to 'Ó'
+compose '\'' 'o' to 'ó'
+compose '^' 'O' to 'Ô'
+compose '^' 'o' to 'ô'
+compose '~' 'O' to 'Õ'
+compose '~' 'o' to 'õ'
+compose '"' 'O' to 'Ö'
+compose '"' 'o' to 'ö'
+compose '/' 'O' to 'Ø'
+compose '/' 'o' to 'ø'
+compose '`' 'U' to 'Ù'
+compose '`' 'u' to 'ù'
+compose '\'' 'U' to 'Ú'
+compose '\'' 'u' to 'ú'
+compose '^' 'U' to 'Û'
+compose '^' 'u' to 'û'
+compose '"' 'U' to 'Ü'
+compose '"' 'u' to 'ü'
+compose '\'' 'Y' to 'Ý'
+compose '\'' 'y' to 'ý'
+compose 'T' 'H' to 'Þ'
+compose 't' 'h' to 'þ'
+compose 's' 's' to 'ß'
+compose '"' 'y' to 'ÿ'
+compose 's' 'z' to 'ß'
+compose 'i' 'j' to 'ÿ'
diff --git a/arch/m68k/hp300/reboot.S b/arch/m68k/hp300/reboot.S
new file mode 100644
index 000000000..52eb852e6
--- /dev/null
+++ b/arch/m68k/hp300/reboot.S
@@ -0,0 +1,16 @@
+/*
+ *  linux/arch/m68k/hp300/reboot.S
+ *
+ *  Copyright (C) 1998 Philip Blundell <philb@gnu.org>
+ *
+ *  Do the dirty work of rebooting the machine.  Basically we need to undo all the
+ *  good stuff that head.S did when we started up.  The caches and MMU must be
+ *  disabled and then we jump back to the PROM.  This is a bit gruesome but we put
+ *  a brave face on it.
+ */
+
+/* XXX Doesn't work yet.  Not sure why and can't be bothered to fix it at the moment. */
+
+	.globl	hp300_reset
+hp300_reset:
+	jmp	hp300_reset
diff --git a/arch/m68k/hp300/time.c b/arch/m68k/hp300/time.c
new file mode 100644
index 000000000..1d1b7b3b5
--- /dev/null
+++ b/arch/m68k/hp300/time.c
@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  linux/arch/m68k/hp300/time.c
+ *
+ *  Copyright (C) 1998 Philip Blundell <philb@gnu.org>
+ *
+ *  This file contains the HP300-specific time handling code.
+ */
+
+#include <asm/ptrace.h>
+#include <linux/clocksource.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <linux/interrupt.h>
+#include <asm/machdep.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/traps.h>
+#include <asm/blinken.h>
+
+static u64 hp300_read_clk(struct clocksource *cs);
+
+static struct clocksource hp300_clk = {
+	.name   = "timer",
+	.rating = 250,
+	.read   = hp300_read_clk,
+	.mask   = CLOCKSOURCE_MASK(32),
+	.flags  = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+static u32 clk_total, clk_offset;
+
+/* Clock hardware definitions */
+
+#define CLOCKBASE	0xf05f8000
+
+#define	CLKCR1		0x1
+#define	CLKCR2		0x3
+#define	CLKCR3		CLKCR1
+#define	CLKSR		CLKCR2
+#define	CLKMSB1		0x5
+#define	CLKLSB1		0x7
+#define	CLKMSB2		0x9
+#define	CLKMSB3		0xD
+
+#define	CLKSR_INT1	BIT(0)
+
+/* This is for machines which generate the exact clock. */
+
+#define HP300_TIMER_CLOCK_FREQ 250000
+#define HP300_TIMER_CYCLES     (HP300_TIMER_CLOCK_FREQ / HZ)
+#define INTVAL                 (HP300_TIMER_CYCLES - 1)
+
+static irqreturn_t hp300_tick(int irq, void *dev_id)
+{
+	unsigned long flags;
+	unsigned long tmp;
+
+	local_irq_save(flags);
+	in_8(CLOCKBASE + CLKSR);
+	asm volatile ("movpw %1@(5),%0" : "=d" (tmp) : "a" (CLOCKBASE));
+	clk_total += INTVAL;
+	clk_offset = 0;
+	legacy_timer_tick(1);
+	timer_heartbeat();
+	local_irq_restore(flags);
+
+	/* Turn off the network and SCSI leds */
+	blinken_leds(0, 0xe0);
+	return IRQ_HANDLED;
+}
+
+static u64 hp300_read_clk(struct clocksource *cs)
+{
+	unsigned long flags;
+	unsigned char lsb, msb, msb_new;
+	u32 ticks;
+
+	local_irq_save(flags);
+	/* Read current timer 1 value */
+	msb = in_8(CLOCKBASE + CLKMSB1);
+again:
+	if ((in_8(CLOCKBASE + CLKSR) & CLKSR_INT1) && msb > 0)
+		clk_offset = INTVAL;
+	lsb = in_8(CLOCKBASE + CLKLSB1);
+	msb_new = in_8(CLOCKBASE + CLKMSB1);
+	if (msb_new != msb) {
+		msb = msb_new;
+		goto again;
+	}
+
+	ticks = INTVAL - ((msb << 8) | lsb);
+	ticks += clk_offset + clk_total;
+	local_irq_restore(flags);
+
+	return ticks;
+}
+
+void __init hp300_sched_init(void)
+{
+  out_8(CLOCKBASE + CLKCR2, 0x1);		/* select CR1 */
+  out_8(CLOCKBASE + CLKCR1, 0x1);		/* reset */
+
+  asm volatile(" movpw %0,%1@(5)" : : "d" (INTVAL), "a" (CLOCKBASE));
+
+  if (request_irq(IRQ_AUTO_6, hp300_tick, IRQF_TIMER, "timer tick", NULL))
+    pr_err("Couldn't register timer interrupt\n");
+
+  out_8(CLOCKBASE + CLKCR2, 0x1);		/* select CR1 */
+  out_8(CLOCKBASE + CLKCR1, 0x40);		/* enable irq */
+
+  clocksource_register_hz(&hp300_clk, HP300_TIMER_CLOCK_FREQ);
+}
diff --git a/arch/m68k/hp300/time.h b/arch/m68k/hp300/time.h
new file mode 100644
index 000000000..040a098b7
--- /dev/null
+++ b/arch/m68k/hp300/time.h
@@ -0,0 +1 @@
+extern void hp300_sched_init(void);