Initial import

1 files changed, 838 insertions, 0 deletions

diff --git a/arch/m68k/amiga/config.c b/arch/m68k/amiga/config.c
new file mode 100644
index 000000000..01693df7f
--- /dev/null
+++ b/arch/m68k/amiga/config.c
@@ -0,0 +1,838 @@
+/*
+ *  linux/arch/m68k/amiga/config.c
+ *
+ *  Copyright (C) 1993 Hamish Macdonald
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+/*
+ * Miscellaneous Amiga stuff
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/seq_file.h>
+#include <linux/tty.h>
+#include <linux/console.h>
+#include <linux/rtc.h>
+#include <linux/init.h>
+#include <linux/vt_kern.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/zorro.h>
+#include <linux/module.h>
+#include <linux/keyboard.h>
+
+#include <asm/bootinfo.h>
+#include <asm/bootinfo-amiga.h>
+#include <asm/byteorder.h>
+#include <asm/setup.h>
+#include <asm/pgtable.h>
+#include <asm/amigahw.h>
+#include <asm/amigaints.h>
+#include <asm/irq.h>
+#include <asm/rtc.h>
+#include <asm/machdep.h>
+#include <asm/io.h>
+
+static unsigned long amiga_model;
+
+unsigned long amiga_eclock;
+EXPORT_SYMBOL(amiga_eclock);
+
+unsigned long amiga_colorclock;
+EXPORT_SYMBOL(amiga_colorclock);
+
+unsigned long amiga_chipset;
+EXPORT_SYMBOL(amiga_chipset);
+
+unsigned char amiga_vblank;
+EXPORT_SYMBOL(amiga_vblank);
+
+static unsigned char amiga_psfreq;
+
+struct amiga_hw_present amiga_hw_present;
+EXPORT_SYMBOL(amiga_hw_present);
+
+static char s_a500[] __initdata = "A500";
+static char s_a500p[] __initdata = "A500+";
+static char s_a600[] __initdata = "A600";
+static char s_a1000[] __initdata = "A1000";
+static char s_a1200[] __initdata = "A1200";
+static char s_a2000[] __initdata = "A2000";
+static char s_a2500[] __initdata = "A2500";
+static char s_a3000[] __initdata = "A3000";
+static char s_a3000t[] __initdata = "A3000T";
+static char s_a3000p[] __initdata = "A3000+";
+static char s_a4000[] __initdata = "A4000";
+static char s_a4000t[] __initdata = "A4000T";
+static char s_cdtv[] __initdata = "CDTV";
+static char s_cd32[] __initdata = "CD32";
+static char s_draco[] __initdata = "Draco";
+static char *amiga_models[] __initdata = {
+	[AMI_500-AMI_500]	= s_a500,
+	[AMI_500PLUS-AMI_500]	= s_a500p,
+	[AMI_600-AMI_500]	= s_a600,
+	[AMI_1000-AMI_500]	= s_a1000,
+	[AMI_1200-AMI_500]	= s_a1200,
+	[AMI_2000-AMI_500]	= s_a2000,
+	[AMI_2500-AMI_500]	= s_a2500,
+	[AMI_3000-AMI_500]	= s_a3000,
+	[AMI_3000T-AMI_500]	= s_a3000t,
+	[AMI_3000PLUS-AMI_500]	= s_a3000p,
+	[AMI_4000-AMI_500]	= s_a4000,
+	[AMI_4000T-AMI_500]	= s_a4000t,
+	[AMI_CDTV-AMI_500]	= s_cdtv,
+	[AMI_CD32-AMI_500]	= s_cd32,
+	[AMI_DRACO-AMI_500]	= s_draco,
+};
+
+static char amiga_model_name[13] = "Amiga ";
+
+static void amiga_sched_init(irq_handler_t handler);
+static void amiga_get_model(char *model);
+static void amiga_get_hardware_list(struct seq_file *m);
+/* amiga specific timer functions */
+static u32 amiga_gettimeoffset(void);
+extern void amiga_mksound(unsigned int count, unsigned int ticks);
+static void amiga_reset(void);
+extern void amiga_init_sound(void);
+static void amiga_mem_console_write(struct console *co, const char *b,
+				    unsigned int count);
+#ifdef CONFIG_HEARTBEAT
+static void amiga_heartbeat(int on);
+#endif
+
+static struct console amiga_console_driver = {
+	.name	= "debug",
+	.flags	= CON_PRINTBUFFER,
+	.index	= -1,
+};
+
+
+    /*
+     *  Motherboard Resources present in all Amiga models
+     */
+
+static struct {
+	struct resource _ciab, _ciaa, _custom, _kickstart;
+} mb_resources = {
+	._ciab = {
+		.name = "CIA B", .start = 0x00bfd000, .end = 0x00bfdfff
+	},
+	._ciaa = {
+		.name = "CIA A", .start = 0x00bfe000, .end = 0x00bfefff
+	},
+	._custom = {
+		.name = "Custom I/O", .start = 0x00dff000, .end = 0x00dfffff
+	},
+	._kickstart = {
+		.name = "Kickstart ROM", .start = 0x00f80000, .end = 0x00ffffff
+	}
+};
+
+static struct resource ram_resource[NUM_MEMINFO];
+
+
+    /*
+     *  Parse an Amiga-specific record in the bootinfo
+     */
+
+int __init amiga_parse_bootinfo(const struct bi_record *record)
+{
+	int unknown = 0;
+	const void *data = record->data;
+
+	switch (be16_to_cpu(record->tag)) {
+	case BI_AMIGA_MODEL:
+		amiga_model = be32_to_cpup(data);
+		break;
+
+	case BI_AMIGA_ECLOCK:
+		amiga_eclock = be32_to_cpup(data);
+		break;
+
+	case BI_AMIGA_CHIPSET:
+		amiga_chipset = be32_to_cpup(data);
+		break;
+
+	case BI_AMIGA_CHIP_SIZE:
+		amiga_chip_size = be32_to_cpup(data);
+		break;
+
+	case BI_AMIGA_VBLANK:
+		amiga_vblank = *(const __u8 *)data;
+		break;
+
+	case BI_AMIGA_PSFREQ:
+		amiga_psfreq = *(const __u8 *)data;
+		break;
+
+	case BI_AMIGA_AUTOCON:
+#ifdef CONFIG_ZORRO
+		if (zorro_num_autocon < ZORRO_NUM_AUTO) {
+			const struct ConfigDev *cd = data;
+			struct zorro_dev_init *dev = &zorro_autocon_init[zorro_num_autocon++];
+			dev->rom = cd->cd_Rom;
+			dev->slotaddr = be16_to_cpu(cd->cd_SlotAddr);
+			dev->slotsize = be16_to_cpu(cd->cd_SlotSize);
+			dev->boardaddr = be32_to_cpu(cd->cd_BoardAddr);
+			dev->boardsize = be32_to_cpu(cd->cd_BoardSize);
+		} else
+			pr_warn("amiga_parse_bootinfo: too many AutoConfig devices\n");
+#endif /* CONFIG_ZORRO */
+		break;
+
+	case BI_AMIGA_SERPER:
+		/* serial port period: ignored here */
+		break;
+
+	default:
+		unknown = 1;
+	}
+	return unknown;
+}
+
+    /*
+     *  Identify builtin hardware
+     */
+
+static void __init amiga_identify(void)
+{
+	/* Fill in some default values, if necessary */
+	if (amiga_eclock == 0)
+		amiga_eclock = 709379;
+
+	memset(&amiga_hw_present, 0, sizeof(amiga_hw_present));
+
+	pr_info("Amiga hardware found: ");
+	if (amiga_model >= AMI_500 && amiga_model <= AMI_DRACO) {
+		pr_cont("[%s] ", amiga_models[amiga_model-AMI_500]);
+		strcat(amiga_model_name, amiga_models[amiga_model-AMI_500]);
+	}
+
+	switch (amiga_model) {
+	case AMI_UNKNOWN:
+		goto Generic;
+
+	case AMI_600:
+	case AMI_1200:
+		AMIGAHW_SET(A1200_IDE);
+		AMIGAHW_SET(PCMCIA);
+	case AMI_500:
+	case AMI_500PLUS:
+	case AMI_1000:
+	case AMI_2000:
+	case AMI_2500:
+		AMIGAHW_SET(A2000_CLK);	/* Is this correct for all models? */
+		goto Generic;
+
+	case AMI_3000:
+	case AMI_3000T:
+		AMIGAHW_SET(AMBER_FF);
+		AMIGAHW_SET(MAGIC_REKICK);
+		/* fall through */
+	case AMI_3000PLUS:
+		AMIGAHW_SET(A3000_SCSI);
+		AMIGAHW_SET(A3000_CLK);
+		AMIGAHW_SET(ZORRO3);
+		goto Generic;
+
+	case AMI_4000T:
+		AMIGAHW_SET(A4000_SCSI);
+		/* fall through */
+	case AMI_4000:
+		AMIGAHW_SET(A4000_IDE);
+		AMIGAHW_SET(A3000_CLK);
+		AMIGAHW_SET(ZORRO3);
+		goto Generic;
+
+	case AMI_CDTV:
+	case AMI_CD32:
+		AMIGAHW_SET(CD_ROM);
+		AMIGAHW_SET(A2000_CLK);             /* Is this correct? */
+		goto Generic;
+
+	Generic:
+		AMIGAHW_SET(AMI_VIDEO);
+		AMIGAHW_SET(AMI_BLITTER);
+		AMIGAHW_SET(AMI_AUDIO);
+		AMIGAHW_SET(AMI_FLOPPY);
+		AMIGAHW_SET(AMI_KEYBOARD);
+		AMIGAHW_SET(AMI_MOUSE);
+		AMIGAHW_SET(AMI_SERIAL);
+		AMIGAHW_SET(AMI_PARALLEL);
+		AMIGAHW_SET(CHIP_RAM);
+		AMIGAHW_SET(PAULA);
+
+		switch (amiga_chipset) {
+		case CS_OCS:
+		case CS_ECS:
+		case CS_AGA:
+			switch (amiga_custom.deniseid & 0xf) {
+			case 0x0c:
+				AMIGAHW_SET(DENISE_HR);
+				break;
+			case 0x08:
+				AMIGAHW_SET(LISA);
+				break;
+			}
+			break;
+		default:
+			AMIGAHW_SET(DENISE);
+			break;
+		}
+		switch ((amiga_custom.vposr>>8) & 0x7f) {
+		case 0x00:
+			AMIGAHW_SET(AGNUS_PAL);
+			break;
+		case 0x10:
+			AMIGAHW_SET(AGNUS_NTSC);
+			break;
+		case 0x20:
+		case 0x21:
+			AMIGAHW_SET(AGNUS_HR_PAL);
+			break;
+		case 0x30:
+		case 0x31:
+			AMIGAHW_SET(AGNUS_HR_NTSC);
+			break;
+		case 0x22:
+		case 0x23:
+			AMIGAHW_SET(ALICE_PAL);
+			break;
+		case 0x32:
+		case 0x33:
+			AMIGAHW_SET(ALICE_NTSC);
+			break;
+		}
+		AMIGAHW_SET(ZORRO);
+		break;
+
+	case AMI_DRACO:
+		panic("No support for Draco yet");
+
+	default:
+		panic("Unknown Amiga Model");
+	}
+
+#define AMIGAHW_ANNOUNCE(name, str)		\
+	if (AMIGAHW_PRESENT(name))		\
+		pr_cont(str)
+
+	AMIGAHW_ANNOUNCE(AMI_VIDEO, "VIDEO ");
+	AMIGAHW_ANNOUNCE(AMI_BLITTER, "BLITTER ");
+	AMIGAHW_ANNOUNCE(AMBER_FF, "AMBER_FF ");
+	AMIGAHW_ANNOUNCE(AMI_AUDIO, "AUDIO ");
+	AMIGAHW_ANNOUNCE(AMI_FLOPPY, "FLOPPY ");
+	AMIGAHW_ANNOUNCE(A3000_SCSI, "A3000_SCSI ");
+	AMIGAHW_ANNOUNCE(A4000_SCSI, "A4000_SCSI ");
+	AMIGAHW_ANNOUNCE(A1200_IDE, "A1200_IDE ");
+	AMIGAHW_ANNOUNCE(A4000_IDE, "A4000_IDE ");
+	AMIGAHW_ANNOUNCE(CD_ROM, "CD_ROM ");
+	AMIGAHW_ANNOUNCE(AMI_KEYBOARD, "KEYBOARD ");
+	AMIGAHW_ANNOUNCE(AMI_MOUSE, "MOUSE ");
+	AMIGAHW_ANNOUNCE(AMI_SERIAL, "SERIAL ");
+	AMIGAHW_ANNOUNCE(AMI_PARALLEL, "PARALLEL ");
+	AMIGAHW_ANNOUNCE(A2000_CLK, "A2000_CLK ");
+	AMIGAHW_ANNOUNCE(A3000_CLK, "A3000_CLK ");
+	AMIGAHW_ANNOUNCE(CHIP_RAM, "CHIP_RAM ");
+	AMIGAHW_ANNOUNCE(PAULA, "PAULA ");
+	AMIGAHW_ANNOUNCE(DENISE, "DENISE ");
+	AMIGAHW_ANNOUNCE(DENISE_HR, "DENISE_HR ");
+	AMIGAHW_ANNOUNCE(LISA, "LISA ");
+	AMIGAHW_ANNOUNCE(AGNUS_PAL, "AGNUS_PAL ");
+	AMIGAHW_ANNOUNCE(AGNUS_NTSC, "AGNUS_NTSC ");
+	AMIGAHW_ANNOUNCE(AGNUS_HR_PAL, "AGNUS_HR_PAL ");
+	AMIGAHW_ANNOUNCE(AGNUS_HR_NTSC, "AGNUS_HR_NTSC ");
+	AMIGAHW_ANNOUNCE(ALICE_PAL, "ALICE_PAL ");
+	AMIGAHW_ANNOUNCE(ALICE_NTSC, "ALICE_NTSC ");
+	AMIGAHW_ANNOUNCE(MAGIC_REKICK, "MAGIC_REKICK ");
+	AMIGAHW_ANNOUNCE(PCMCIA, "PCMCIA ");
+	if (AMIGAHW_PRESENT(ZORRO))
+		pr_cont("ZORRO%s ", AMIGAHW_PRESENT(ZORRO3) ? "3" : "");
+	pr_cont("\n");
+
+#undef AMIGAHW_ANNOUNCE
+}
+
+
+static unsigned long amiga_random_get_entropy(void)
+{
+	/* VPOSR/VHPOSR provide at least 17 bits of data changing at 1.79 MHz */
+	return *(unsigned long *)&amiga_custom.vposr;
+}
+
+
+    /*
+     *  Setup the Amiga configuration info
+     */
+
+void __init config_amiga(void)
+{
+	int i;
+
+	amiga_identify();
+
+	/* Yuk, we don't have PCI memory */
+	iomem_resource.name = "Memory";
+	for (i = 0; i < 4; i++)
+		request_resource(&iomem_resource, &((struct resource *)&mb_resources)[i]);
+
+	mach_sched_init      = amiga_sched_init;
+	mach_init_IRQ        = amiga_init_IRQ;
+	mach_get_model       = amiga_get_model;
+	mach_get_hardware_list = amiga_get_hardware_list;
+	arch_gettimeoffset   = amiga_gettimeoffset;
+
+	/*
+	 * default MAX_DMA=0xffffffff on all machines. If we don't do so, the SCSI
+	 * code will not be able to allocate any mem for transfers, unless we are
+	 * dealing with a Z2 mem only system.                  /Jes
+	 */
+	mach_max_dma_address = 0xffffffff;
+
+	mach_reset           = amiga_reset;
+#if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
+	mach_beep            = amiga_mksound;
+#endif
+
+#ifdef CONFIG_HEARTBEAT
+	mach_heartbeat = amiga_heartbeat;
+#endif
+
+	mach_random_get_entropy = amiga_random_get_entropy;
+
+	/* Fill in the clock value (based on the 700 kHz E-Clock) */
+	amiga_colorclock = 5*amiga_eclock;	/* 3.5 MHz */
+
+	/* clear all DMA bits */
+	amiga_custom.dmacon = DMAF_ALL;
+	/* ensure that the DMA master bit is set */
+	amiga_custom.dmacon = DMAF_SETCLR | DMAF_MASTER;
+
+	/* don't use Z2 RAM as system memory on Z3 capable machines */
+	if (AMIGAHW_PRESENT(ZORRO3)) {
+		int i, j;
+		u32 disabled_z2mem = 0;
+
+		for (i = 0; i < m68k_num_memory; i++) {
+			if (m68k_memory[i].addr < 16*1024*1024) {
+				if (i == 0) {
+					/* don't cut off the branch we're sitting on */
+					pr_warn("Warning: kernel runs in Zorro II memory\n");
+					continue;
+				}
+				disabled_z2mem += m68k_memory[i].size;
+				m68k_num_memory--;
+				for (j = i; j < m68k_num_memory; j++)
+					m68k_memory[j] = m68k_memory[j+1];
+				i--;
+			}
+		}
+		if (disabled_z2mem)
+			pr_info("%dK of Zorro II memory will not be used as system memory\n",
+				disabled_z2mem>>10);
+	}
+
+	/* request all RAM */
+	for (i = 0; i < m68k_num_memory; i++) {
+		ram_resource[i].name =
+			(m68k_memory[i].addr >= 0x01000000) ? "32-bit Fast RAM" :
+			(m68k_memory[i].addr < 0x00c00000) ? "16-bit Fast RAM" :
+			"16-bit Slow RAM";
+		ram_resource[i].start = m68k_memory[i].addr;
+		ram_resource[i].end = m68k_memory[i].addr+m68k_memory[i].size-1;
+		request_resource(&iomem_resource, &ram_resource[i]);
+	}
+
+	/* initialize chipram allocator */
+	amiga_chip_init();
+
+	/* our beloved beeper */
+	if (AMIGAHW_PRESENT(AMI_AUDIO))
+		amiga_init_sound();
+
+	/*
+	 * if it is an A3000, set the magic bit that forces
+	 * a hard rekick
+	 */
+	if (AMIGAHW_PRESENT(MAGIC_REKICK))
+		*(unsigned char *)ZTWO_VADDR(0xde0002) |= 0x80;
+}
+
+static unsigned short jiffy_ticks;
+
+static void __init amiga_sched_init(irq_handler_t timer_routine)
+{
+	static struct resource sched_res = {
+		.name = "timer", .start = 0x00bfd400, .end = 0x00bfd5ff,
+	};
+	jiffy_ticks = DIV_ROUND_CLOSEST(amiga_eclock, HZ);
+
+	if (request_resource(&mb_resources._ciab, &sched_res))
+		pr_warn("Cannot allocate ciab.ta{lo,hi}\n");
+	ciab.cra &= 0xC0;   /* turn off timer A, continuous mode, from Eclk */
+	ciab.talo = jiffy_ticks % 256;
+	ciab.tahi = jiffy_ticks / 256;
+
+	/* install interrupt service routine for CIAB Timer A
+	 *
+	 * Please don't change this to use ciaa, as it interferes with the
+	 * SCSI code. We'll have to take a look at this later
+	 */
+	if (request_irq(IRQ_AMIGA_CIAB_TA, timer_routine, 0, "timer", NULL))
+		pr_err("Couldn't register timer interrupt\n");
+	/* start timer */
+	ciab.cra |= 0x11;
+}
+
+#define TICK_SIZE 10000
+
+/* This is always executed with interrupts disabled.  */
+static u32 amiga_gettimeoffset(void)
+{
+	unsigned short hi, lo, hi2;
+	u32 ticks, offset = 0;
+
+	/* read CIA B timer A current value */
+	hi  = ciab.tahi;
+	lo  = ciab.talo;
+	hi2 = ciab.tahi;
+
+	if (hi != hi2) {
+		lo = ciab.talo;
+		hi = hi2;
+	}
+
+	ticks = hi << 8 | lo;
+
+	if (ticks > jiffy_ticks / 2)
+		/* check for pending interrupt */
+		if (cia_set_irq(&ciab_base, 0) & CIA_ICR_TA)
+			offset = 10000;
+
+	ticks = jiffy_ticks - ticks;
+	ticks = (10000 * ticks) / jiffy_ticks;
+
+	return (ticks + offset) * 1000;
+}
+
+static void amiga_reset(void)  __noreturn;
+
+static void amiga_reset(void)
+{
+	unsigned long jmp_addr040 = virt_to_phys(&&jmp_addr_label040);
+	unsigned long jmp_addr = virt_to_phys(&&jmp_addr_label);
+
+	local_irq_disable();
+	if (CPU_IS_040_OR_060)
+		/* Setup transparent translation registers for mapping
+		 * of 16 MB kernel segment before disabling translation
+		 */
+		asm volatile ("\n"
+			"	move.l	%0,%%d0\n"
+			"	and.l	#0xff000000,%%d0\n"
+			"	or.w	#0xe020,%%d0\n"   /* map 16 MB, enable, cacheable */
+			"	.chip	68040\n"
+			"	movec	%%d0,%%itt0\n"
+			"	movec	%%d0,%%dtt0\n"
+			"	.chip	68k\n"
+			"	jmp	%0@\n"
+			: /* no outputs */
+			: "a" (jmp_addr040)
+			: "d0");
+	else
+		/* for 680[23]0, just disable translation and jump to the physical
+		 * address of the label
+		 */
+		asm volatile ("\n"
+			"	pmove	%%tc,%@\n"
+			"	bclr	#7,%@\n"
+			"	pmove	%@,%%tc\n"
+			"	jmp	%0@\n"
+			: /* no outputs */
+			: "a" (jmp_addr));
+jmp_addr_label040:
+	/* disable translation on '040 now */
+	asm volatile ("\n"
+		"	moveq	#0,%%d0\n"
+		"	.chip	68040\n"
+		"	movec	%%d0,%%tc\n"	/* disable MMU */
+		"	.chip	68k\n"
+		: /* no outputs */
+		: /* no inputs */
+		: "d0");
+
+	jmp_addr_label:
+	/* pickup reset address from AmigaOS ROM, reset devices and jump
+	 * to reset address
+	 */
+	asm volatile ("\n"
+		"	move.w	#0x2700,%sr\n"
+		"	lea	0x01000000,%a0\n"
+		"	sub.l	%a0@(-0x14),%a0\n"
+		"	move.l	%a0@(4),%a0\n"
+		"	subq.l	#2,%a0\n"
+		"	jra	1f\n"
+		/* align on a longword boundary */
+		"	" __ALIGN_STR "\n"
+		"1:\n"
+		"	reset\n"
+		"	jmp   %a0@");
+
+	for (;;)
+		;
+}
+
+
+    /*
+     *  Debugging
+     */
+
+#define SAVEKMSG_MAXMEM		128*1024
+
+#define SAVEKMSG_MAGIC1		0x53415645	/* 'SAVE' */
+#define SAVEKMSG_MAGIC2		0x4B4D5347	/* 'KMSG' */
+
+struct savekmsg {
+	unsigned long magic1;		/* SAVEKMSG_MAGIC1 */
+	unsigned long magic2;		/* SAVEKMSG_MAGIC2 */
+	unsigned long magicptr;		/* address of magic1 */
+	unsigned long size;
+	char data[0];
+};
+
+static struct savekmsg *savekmsg;
+
+static void amiga_mem_console_write(struct console *co, const char *s,
+				    unsigned int count)
+{
+	if (savekmsg->size + count <= SAVEKMSG_MAXMEM-sizeof(struct savekmsg)) {
+		memcpy(savekmsg->data + savekmsg->size, s, count);
+		savekmsg->size += count;
+	}
+}
+
+static int __init amiga_savekmsg_setup(char *arg)
+{
+	bool registered;
+
+	if (!MACH_IS_AMIGA || strcmp(arg, "mem"))
+		return 0;
+
+	if (amiga_chip_size < SAVEKMSG_MAXMEM) {
+		pr_err("Not enough chipram for debugging\n");
+		return -ENOMEM;
+	}
+
+	/* Just steal the block, the chipram allocator isn't functional yet */
+	amiga_chip_size -= SAVEKMSG_MAXMEM;
+	savekmsg = ZTWO_VADDR(CHIP_PHYSADDR + amiga_chip_size);
+	savekmsg->magic1 = SAVEKMSG_MAGIC1;
+	savekmsg->magic2 = SAVEKMSG_MAGIC2;
+	savekmsg->magicptr = ZTWO_PADDR(savekmsg);
+	savekmsg->size = 0;
+
+	registered = !!amiga_console_driver.write;
+	amiga_console_driver.write = amiga_mem_console_write;
+	if (!registered)
+		register_console(&amiga_console_driver);
+	return 0;
+}
+
+early_param("debug", amiga_savekmsg_setup);
+
+static void amiga_serial_putc(char c)
+{
+	amiga_custom.serdat = (unsigned char)c | 0x100;
+	while (!(amiga_custom.serdatr & 0x2000))
+		;
+}
+
+static void amiga_serial_console_write(struct console *co, const char *s,
+				       unsigned int count)
+{
+	while (count--) {
+		if (*s == '\n')
+			amiga_serial_putc('\r');
+		amiga_serial_putc(*s++);
+	}
+}
+
+#if 0
+void amiga_serial_puts(const char *s)
+{
+	amiga_serial_console_write(NULL, s, strlen(s));
+}
+
+int amiga_serial_console_wait_key(struct console *co)
+{
+	int ch;
+
+	while (!(amiga_custom.intreqr & IF_RBF))
+		barrier();
+	ch = amiga_custom.serdatr & 0xff;
+	/* clear the interrupt, so that another character can be read */
+	amiga_custom.intreq = IF_RBF;
+	return ch;
+}
+
+void amiga_serial_gets(struct console *co, char *s, int len)
+{
+	int ch, cnt = 0;
+
+	while (1) {
+		ch = amiga_serial_console_wait_key(co);
+
+		/* Check for backspace. */
+		if (ch == 8 || ch == 127) {
+			if (cnt == 0) {
+				amiga_serial_putc('\007');
+				continue;
+			}
+			cnt--;
+			amiga_serial_puts("\010 \010");
+			continue;
+		}
+
+		/* Check for enter. */
+		if (ch == 10 || ch == 13)
+			break;
+
+		/* See if line is too long. */
+		if (cnt >= len + 1) {
+			amiga_serial_putc(7);
+			cnt--;
+			continue;
+		}
+
+		/* Store and echo character. */
+		s[cnt++] = ch;
+		amiga_serial_putc(ch);
+	}
+	/* Print enter. */
+	amiga_serial_puts("\r\n");
+	s[cnt] = 0;
+}
+#endif
+
+static int __init amiga_debug_setup(char *arg)
+{
+	bool registered;
+
+	if (!MACH_IS_AMIGA || strcmp(arg, "ser"))
+		return 0;
+
+	/* no initialization required (?) */
+	registered = !!amiga_console_driver.write;
+	amiga_console_driver.write = amiga_serial_console_write;
+	if (!registered)
+		register_console(&amiga_console_driver);
+	return 0;
+}
+
+early_param("debug", amiga_debug_setup);
+
+#ifdef CONFIG_HEARTBEAT
+static void amiga_heartbeat(int on)
+{
+	if (on)
+		ciaa.pra &= ~2;
+	else
+		ciaa.pra |= 2;
+}
+#endif
+
+    /*
+     *  Amiga specific parts of /proc
+     */
+
+static void amiga_get_model(char *model)
+{
+	strcpy(model, amiga_model_name);
+}
+
+
+static void amiga_get_hardware_list(struct seq_file *m)
+{
+	if (AMIGAHW_PRESENT(CHIP_RAM))
+		seq_printf(m, "Chip RAM:\t%ldK\n", amiga_chip_size>>10);
+	seq_printf(m, "PS Freq:\t%dHz\nEClock Freq:\t%ldHz\n",
+			amiga_psfreq, amiga_eclock);
+	if (AMIGAHW_PRESENT(AMI_VIDEO)) {
+		char *type;
+		switch (amiga_chipset) {
+		case CS_OCS:
+			type = "OCS";
+			break;
+		case CS_ECS:
+			type = "ECS";
+			break;
+		case CS_AGA:
+			type = "AGA";
+			break;
+		default:
+			type = "Old or Unknown";
+			break;
+		}
+		seq_printf(m, "Graphics:\t%s\n", type);
+	}
+
+#define AMIGAHW_ANNOUNCE(name, str)			\
+	if (AMIGAHW_PRESENT(name))			\
+		seq_printf (m, "\t%s\n", str)
+
+	seq_printf (m, "Detected hardware:\n");
+
+	AMIGAHW_ANNOUNCE(AMI_VIDEO, "Amiga Video");
+	AMIGAHW_ANNOUNCE(AMI_BLITTER, "Blitter");
+	AMIGAHW_ANNOUNCE(AMBER_FF, "Amber Flicker Fixer");
+	AMIGAHW_ANNOUNCE(AMI_AUDIO, "Amiga Audio");
+	AMIGAHW_ANNOUNCE(AMI_FLOPPY, "Floppy Controller");
+	AMIGAHW_ANNOUNCE(A3000_SCSI, "SCSI Controller WD33C93 (A3000 style)");
+	AMIGAHW_ANNOUNCE(A4000_SCSI, "SCSI Controller NCR53C710 (A4000T style)");
+	AMIGAHW_ANNOUNCE(A1200_IDE, "IDE Interface (A1200 style)");
+	AMIGAHW_ANNOUNCE(A4000_IDE, "IDE Interface (A4000 style)");
+	AMIGAHW_ANNOUNCE(CD_ROM, "Internal CD ROM drive");
+	AMIGAHW_ANNOUNCE(AMI_KEYBOARD, "Keyboard");
+	AMIGAHW_ANNOUNCE(AMI_MOUSE, "Mouse Port");
+	AMIGAHW_ANNOUNCE(AMI_SERIAL, "Serial Port");
+	AMIGAHW_ANNOUNCE(AMI_PARALLEL, "Parallel Port");
+	AMIGAHW_ANNOUNCE(A2000_CLK, "Hardware Clock (A2000 style)");
+	AMIGAHW_ANNOUNCE(A3000_CLK, "Hardware Clock (A3000 style)");
+	AMIGAHW_ANNOUNCE(CHIP_RAM, "Chip RAM");
+	AMIGAHW_ANNOUNCE(PAULA, "Paula 8364");
+	AMIGAHW_ANNOUNCE(DENISE, "Denise 8362");
+	AMIGAHW_ANNOUNCE(DENISE_HR, "Denise 8373");
+	AMIGAHW_ANNOUNCE(LISA, "Lisa 8375");
+	AMIGAHW_ANNOUNCE(AGNUS_PAL, "Normal/Fat PAL Agnus 8367/8371");
+	AMIGAHW_ANNOUNCE(AGNUS_NTSC, "Normal/Fat NTSC Agnus 8361/8370");
+	AMIGAHW_ANNOUNCE(AGNUS_HR_PAL, "Fat Hires PAL Agnus 8372");
+	AMIGAHW_ANNOUNCE(AGNUS_HR_NTSC, "Fat Hires NTSC Agnus 8372");
+	AMIGAHW_ANNOUNCE(ALICE_PAL, "PAL Alice 8374");
+	AMIGAHW_ANNOUNCE(ALICE_NTSC, "NTSC Alice 8374");
+	AMIGAHW_ANNOUNCE(MAGIC_REKICK, "Magic Hard Rekick");
+	AMIGAHW_ANNOUNCE(PCMCIA, "PCMCIA Slot");
+#ifdef CONFIG_ZORRO
+	if (AMIGAHW_PRESENT(ZORRO))
+		seq_printf(m, "\tZorro II%s AutoConfig: %d Expansion "
+				"Device%s\n",
+				AMIGAHW_PRESENT(ZORRO3) ? "I" : "",
+				zorro_num_autocon, zorro_num_autocon == 1 ? "" : "s");
+#endif /* CONFIG_ZORRO */
+
+#undef AMIGAHW_ANNOUNCE
+}
+
+/*
+ * The Amiga keyboard driver needs key_maps, but we cannot export it in
+ * drivers/char/defkeymap.c, as it is autogenerated
+ */
+#ifdef CONFIG_HW_CONSOLE
+EXPORT_SYMBOL_GPL(key_maps);
+#endif