Ahh! This code brings out old memories. Eight years old but still

useful. This is the ARCBIOS interface, eg the firmware interface
for SGI machines.

2 files changed, 719 insertions, 0 deletions

diff --git a/sys/arch/mips64/include/arcbios.h b/sys/arch/mips64/include/arcbios.h
new file mode 100644
index 00000000000..d5084a2b987
--- /dev/null
+++ b/sys/arch/mips64/include/arcbios.h
@@ -0,0 +1,392 @@
+/*	$OpenBSD: arcbios.h,v 1.1 2004/08/08 21:51:36 pefo Exp $	*/
+/*-
+ * Copyright (c) 1996 M. Warner Losh.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+
+typedef struct arc_sid
+{
+	char vendor[8];
+	char prodid[8];
+} arc_sid_t;
+
+typedef enum arc_config_class
+{
+	arc_SystemClass,
+	arc_ProcessorClass,
+	arc_CacheClass,
+	arc_AdapterClass,
+	arc_ControllerClass,
+	arc_PeripheralClass,
+	arc_MemoryClass
+} arc_config_class_t;
+
+typedef enum arc_config_type
+{
+	arc_System,
+
+	arc_CentralProcessor,
+	arc_FloatingPointProcessor,
+
+	arc_PrimaryIcache,
+	arc_PrimaryDcache,
+	arc_SecondaryIcache,
+	arc_SecondaryDcache,
+	arc_SecondaryCache,
+
+	arc_EisaAdapter,		/* Eisa adapter         */
+	arc_TcAdapter,			/* Turbochannel adapter */
+	arc_ScsiAdapter,		/* SCSI adapter         */
+	arc_DtiAdapter,			/* AccessBus adapter    */
+	arc_MultiFunctionAdapter,
+
+	arc_DiskController,
+	arc_TapeController,
+	arc_CdromController,
+	arc_WormController,
+	arc_SerialController,
+	arc_NetworkController,
+	arc_DisplayController,
+	arc_ParallelController,
+	arc_PointerController,
+	arc_KeyboardController,
+	arc_AudioController,
+	arc_OtherController,		/* denotes a controller not otherwise defined */
+
+	arc_DiskPeripheral,
+	arc_FloppyDiskPeripheral,
+	arc_TapePeripheral,
+	arc_ModemPeripheral,
+	arc_MonitorPeripheral,
+	arc_PrinterPeripheral,
+	arc_PointerPeripheral,
+	arc_KeyboardPeripheral,
+	arc_TerminalPeripheral,
+	arc_OtherPeripheral,		/* denotes a peripheral not otherwise defined   */
+	arc_LinePeripheral,
+	arc_NetworkPeripheral,
+
+	arc_SystemMemory
+} arc_config_type_t;
+
+typedef u_char arc_dev_flags_t;
+
+/* Wonder how this is aligned... */
+typedef struct arc_config
+{
+	arc_config_class_t	class;		/* Likely these three all */
+	arc_config_type_t	type;		/* need to be uchar to make */
+	arc_dev_flags_t		flags;		/* the alignment right */
+	u_int16_t		version;
+	u_int16_t		revision;
+	u_int32_t		key;
+	u_int32_t		affinity_mask;
+	u_int32_t		config_data_len;
+	u_int32_t		id_len;
+	char 			*id;
+} arc_config_t;
+
+typedef enum arc_status
+{
+	arc_ESUCCESS,			/* Success                   */
+	arc_E2BIG,			/* Arg list too long         */
+	arc_EACCES,			/* No such file or directory */
+	arc_EAGAIN,			/* Try again                 */
+	arc_EBADF,			/* Bad file number           */
+	arc_EBUSY,			/* Device or resource busy   */
+	arc_EFAULT,			/* Bad address               */
+	arc_EINVAL,			/* Invalid argument          */
+	arc_EIO,			/* I/O error                 */
+	arc_EISDIR,			/* Is a directory            */
+	arc_EMFILE,			/* Too many open files       */
+	arc_EMLINK,			/* Too many links            */
+	arc_ENAMETOOLONG,		/* File name too long        */
+	arc_ENODEV,			/* No such device            */
+	arc_ENOENT,			/* No such file or directory */
+	arc_ENOEXEC,			/* Exec format error         */
+	arc_ENOMEM,			/* Out of memory             */
+	arc_ENOSPC,			/* No space left on device   */
+	arc_ENOTDIR,			/* Not a directory           */
+	arc_ENOTTY,			/* Not a typewriter          */
+	arc_ENXIO,			/* No such device or address */
+	arc_EROFS,			/* Read-only file system     */
+} arc_status_t;
+
+/*
+ *	Oops! Arc systems and SGI's have different order of types.
+ */
+#ifdef __arc__
+typedef enum {
+	ExeceptionBlock,	SystemParameterBlock,	FreeMemory,
+	BadMemory,		LoadedProgram,		FirmwareTemporary,
+	FirmwarePermanent,	FreeContigous
+} MEMORYTYPE;
+#endif
+
+#ifdef __sgi__
+typedef enum {
+	ExeceptionBlock,	SystemParameterBlock,	FreeContigous,
+	FreeMemory,		BadMemory,		LoadedProgram,
+	FirmwareTemporary,	FirmwarePermanent,
+} MEMORYTYPE;
+#endif
+
+typedef struct arc_mem {
+	MEMORYTYPE	Type;		/* Memory chunk type */
+	u_int32_t	BasePage;	/* Page no, first page */
+	u_int32_t	PageCount;	/* Number of pages */
+} arc_mem_t;
+
+typedef caddr_t arc_time_t; /* XXX */
+
+typedef struct arc_dsp_stat {
+	u_int16_t	CursorXPosition;
+	u_int16_t	CursorYPosition;
+	u_int16_t	CursorMaxXPosition;
+	u_int16_t	CursorMaxYPosition;
+	u_char		ForegroundColor;
+	u_char		BackgroundColor;
+	u_char		HighIntensity;
+	u_char		Underscored;
+	u_char		ReverseVideo;
+} arc_dsp_stat_t;
+
+typedef caddr_t arc_dirent_t; /* XXX */
+typedef u_int32_t arc_open_mode_t; /* XXX */
+typedef u_int32_t arc_seek_mode_t; /* XXX */
+typedef u_int32_t arc_mount_t; /* XXX */
+
+typedef struct arc_calls
+{
+	arc_status_t (*load)(		/* Load 1 */
+		char *,			/* Image to load */
+		u_int32_t,		/* top address */
+		u_int32_t *,		/* Entry address */
+		u_int32_t *);		/* Low address */
+
+	arc_status_t (*invoke)(		/* Invoke 2 */
+		u_int32_t,		/* Entry Address */
+		u_int32_t,		/* Stack Address */
+		u_int32_t,		/* Argc */
+		char **,		/* argv */
+		char **);		/* envp */
+
+	arc_status_t (*execute)(	/* Execute 3 */
+		char *,			/* Image path */
+		u_int32_t,		/* Argc */
+		char **,		/* argv */
+		char **);		/* envp */
+
+	volatile void (*halt)(void);	/* Halt 4 */
+
+	volatile void (*power_down)(void); /* PowerDown 5 */
+
+	volatile void (*restart)(void);	/* Restart 6 */
+
+	volatile void (*reboot)(void);	/* Reboot 7 */
+
+	volatile void (*enter_interactive_mode)(void); /* EnterInteractiveMode 8 */
+
+	volatile void (*return_from_main)(void); /* ReturnFromMain 9 */
+
+	arc_config_t *(*get_peer)(	/* GetPeer 10 */
+		arc_config_t *); 	/* Component */
+
+	arc_config_t *(*get_child)(	/* GetChild 11 */
+		arc_config_t *);	/* Component */
+
+	arc_config_t *(*get_parent)(	/* GetParent 12 */
+		arc_config_t *);	/* Component */
+
+	arc_status_t (*get_config_data)( /* GetConfigurationData 13 */
+		caddr_t,		/* Configuration Data */
+		arc_config_t *);	/* Component */
+
+	arc_config_t *(*add_child)(	/* AddChild 14 */
+		arc_config_t *,		/* Component */
+		arc_config_t *);	/* New Component */
+
+	arc_status_t (*delete_component)( /* DeleteComponent 15 */
+		arc_config_t *);	/* Component */
+
+	arc_config_t *(*get_component)( /* GetComponent 16 */
+		char *);		/* Path */
+
+	arc_status_t (*save_config)(void); /* SaveConfiguration 17 */
+
+	arc_sid_t *(*get_system_id)(void); /* GetSystemId 18 */
+
+	arc_mem_t *(*get_memory_descriptor)( /* GetMemoryDescriptor 19 */
+		arc_mem_t *);		/* MemoryDescriptor */
+
+#ifdef arc
+	void (*signal)(			/* Signal 20 */
+		u_int32_t,		/* Signal number */
+/**/		caddr_t);		/* Handler */
+#else
+	void *unused;
+#endif
+
+	arc_time_t *(*get_time)(void);	/* GetTime 21 */
+
+	u_int32_t (*get_relative_time)(void); /* GetRelativeTime 22 */
+
+	arc_status_t (*get_dir_entry)(	/* GetDirectoryEntry 23 */
+		u_int32_t,		/* FileId */
+		arc_dirent_t *,		/* Directory entry */
+		u_int32_t,		/* Length */
+		u_int32_t *);		/* Count */
+
+	arc_status_t (*open)(		/* Open 24 */
+		char *,			/* Path */
+		arc_open_mode_t,	/* Open mode */
+		u_int32_t *);		/* FileId */
+
+	arc_status_t (*close)(		/* Close 25 */
+		u_int32_t);		/* FileId */
+
+	arc_status_t (*read)(		/* Read 26 */
+		u_int32_t,		/* FileId */
+		caddr_t,		/* Buffer */
+		u_int32_t,		/* Length */
+		u_int32_t *);		/* Count */
+
+	arc_status_t (*get_read_status)( /* GetReadStatus 27 */
+		u_int32_t);		/* FileId */
+
+	arc_status_t (*write)(		/* Write 28 */
+		u_int32_t,		/* FileId */
+		caddr_t,		/* Buffer */
+		u_int32_t,		/* Length */
+		u_int32_t *);		/* Count */
+
+	arc_status_t (*seek)(		/* Seek 29 */
+		u_int32_t,		/* FileId */
+		int64_t *,		/* Offset */
+		arc_seek_mode_t); 	/* Mode */
+
+	arc_status_t (*mount)(		/* Mount 30 */
+		char *,			/* Path */
+		arc_mount_t);		/* Operation */
+
+	char *(*getenv)(			/* GetEnvironmentVariable 31 */
+		char *);		/* Variable */
+
+	arc_status_t (*putenv)(		/* SetEnvironmentVariable 32 */
+		char *,			/* Variable */
+		char *);		/* Value */
+
+	arc_status_t (*get_file_info)(void);	/* GetFileInformation 33 */
+
+	arc_status_t (*set_file_info)(void);	/* SetFileInformation 34 */
+
+	void (*flush_all_caches)(void);	/* FlushAllCaches 35 */
+
+#ifdef arc
+	arc_status_t (*test_unicode)(	/* TestUnicodeCharacter 36 */
+		u_int32_t,		/* FileId */
+		u_int16_t);		/* UnicodeCharacter */
+
+	arc_dsp_stat_t *(*get_display_status)( /* GetDisplayStatus 37 */
+		u_int32_t);		/* FileId */
+#endif
+} arc_calls_t;
+
+#define ARC_PARAM_BLK_MAGIC	0x53435241
+#define ARC_PARAM_BLK_MAGIC_BUG	0x41524353	/* This is wrong... but req */
+
+typedef struct arc_param_blk 
+{
+	u_int32_t	magic;		/* Magic Number */
+	u_int32_t	length;		/* Length of parameter block */
+	u_int16_t	version;	/* ?? */
+	u_int16_t	revision;	/* ?? */
+/**/	caddr_t		restart_block;	/* ?? */
+/**/	caddr_t		debug_block;	/* Debugging info -- unused */
+/**/	caddr_t		general_exp_vect; /* ?? */
+/**/	caddr_t		tlb_miss_exp_vect; /* ?? */
+	u_int32_t	firmware_length; /* Size of Firmware jumptable in bytes */
+	arc_calls_t	*firmware_vect;	/* Firmware jumptable */
+	u_int32_t	vendor_length;	/* Size of Vendor specific jumptable */
+/**/	caddr_t		vendor_vect;	/* Vendor specific jumptable */
+	u_int32_t	adapter_count;	/* ?? */
+	u_int32_t	adapter0_type;	/* ?? */
+	u_int32_t	adapter0_length; /* ?? */
+/**/	caddr_t		adapter0_vect;	/* ?? */
+} arc_param_blk_t;
+
+#define ArcBiosBase ((arc_param_blk_t *) 0x80001000)
+#define ArcBios (ArcBiosBase->firmware_vect)
+
+
+int  bios_getchar __P((void));
+void bios_putchar(char);
+void bios_putstring(char *);
+void bios_ident(void);
+void bios_display_info(int *, int *, int *, int *);
+
+/*
+ *  Direct ARC-Bios calls.
+ */
+int Bios_Load(void);
+int Bios_Invoke(void);
+int Bios_Execute(void);
+int Bios_Halt(void);
+int Bios_PowerDown(void);
+int Bios_Restart(void);
+int Bios_Reboot(void);
+int Bios_EnterInteractiveMode(void);
+int Bios_GetPeer(void);
+arc_config_t *Bios_GetChild(arc_config_t *);
+int Bios_GetParent(void);
+int Bios_GetConfigurationData(void);
+int Bios_AddChild(void);
+int Bios_DeleteComponent(void);
+int Bios_GetComponent(void);
+int Bios_SaveConfiguration(void);
+arc_sid_t *Bios_GetSystemId(void);
+arc_mem_t *Bios_GetMemoryDescriptor(arc_mem_t *);
+int Bios_GetTime(void);
+int Bios_GetRelativeTime(void);
+int Bios_GetDirectoryEntry(void);
+int Bios_Open(char *, int, u_int *);
+int Bios_Close(u_int);
+int Bios_Read(int, char *, int, int *);
+int Bios_GetReadStatus(void);
+int Bios_Write(int, char *, int, int *);
+int Bios_Seek(void);
+int Bios_Mount(void);
+int Bios_GetEnvironmentVariable(void);
+int Bios_SetEnvironmentVariable(void);
+int Bios_GetFileInformation(void);
+int Bios_SetFileInformation(void);
+int Bios_FlushAllCaches(void);
+int Bios_TestUnicodeCharacter(void);
+arc_dsp_stat_t *Bios_GetDisplayStatus(int);
+
+
diff --git a/sys/arch/mips64/mips64/arcbios.c b/sys/arch/mips64/mips64/arcbios.c
new file mode 100644
index 00000000000..5e122a08a26
--- /dev/null
+++ b/sys/arch/mips64/mips64/arcbios.c
@@ -0,0 +1,327 @@
+/*	$OpenBSD: arcbios.c,v 1.1 2004/08/08 21:51:36 pefo Exp $	*/
+/*-
+ * Copyright (c) 1996 M. Warner Losh.  All rights reserved.
+ * Copyright (c) 1996-2004 Opsycon AB.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/user.h>
+#include <lib/libkern/libkern.h>
+#include <machine/pte.h>
+#include <machine/cpu.h>
+#include <machine/memconf.h>
+#include <machine/param.h>
+#include <machine/autoconf.h>
+#include <mips64/arcbios.h>
+#include <mips64/archtype.h>
+
+arc_param_blk_t *bios_base = ArcBiosBase;
+
+extern int	physmem;		/* Total physical memory size */
+
+void bios_configure_memory(void);
+int bios_get_system_type(void);
+
+arc_dsp_stat_t	displayinfo;		/* Save area for display status info. */
+
+static struct systypes {
+	char *sys_vend;		/* Vendor ID if name is ambigous */
+	char *sys_name;		/* May be left NULL if name is sufficient */
+	int  sys_type;
+} sys_types[] = {
+    { NULL,		"PICA-61",			ACER_PICA_61 },
+    { NULL,		"NEC-R94",			ACER_PICA_61 },
+    { NULL,		"DESKTECH-TYNE",		DESKSTATION_TYNE }, 
+    { NULL,		"DESKTECH-ARCStation I",	DESKSTATION_RPC44 },
+    { NULL,		"Microsoft-Jazz",		MAGNUM },
+    { NULL,		"RM200PCI",			SNI_RM200 },
+    { NULL,		"SGI-IP17",			SGI_CRIMSON },
+    { NULL,		"SGI-IP19",			SGI_ONYX },
+    { NULL,		"SGI-IP20",			SGI_INDIGO },
+    { NULL,		"SGI-IP21",			SGI_POWER },
+    { NULL,		"SGI-IP22",			SGI_INDY },
+    { NULL,		"SGI-IP25",			SGI_POWER10 },
+    { NULL,		"SGI-IP26",			SGI_POWERI },
+    { NULL,		"SGI-IP32",			SGI_O2 },
+};
+
+#define KNOWNSYSTEMS (sizeof(sys_types) / sizeof(struct systypes))
+
+/*
+ *	ARC Bios trampoline code.
+ */
+#define ARC_Call(Name,Offset)	\
+__asm__("\n"			\
+"	.text\n"		\
+"	.ent	" #Name "\n"	\
+"	.align	3\n"		\
+"	.set	noreorder\n"	\
+"	.globl	" #Name "\n" 	\
+#Name":\n"			\
+"	lw	$2, 0x80001020\n"\
+"	lw	$2," #Offset "($2)\n"\
+"	jr	$2\n"		\
+"	nop\n"			\
+"	.end	" #Name "\n"	);
+
+ARC_Call(Bios_Load,			0x00);
+ARC_Call(Bios_Invoke,			0x04);
+ARC_Call(Bios_Execute,			0x08);
+ARC_Call(Bios_Halt,			0x0c);
+ARC_Call(Bios_PowerDown,		0x10);
+ARC_Call(Bios_Restart,			0x14);
+ARC_Call(Bios_Reboot,			0x18);
+ARC_Call(Bios_EnterInteractiveMode,	0x1c);
+ARC_Call(Bios_Unused1,			0x20);
+ARC_Call(Bios_GetPeer,			0x24);
+ARC_Call(Bios_GetChild,			0x28);
+ARC_Call(Bios_GetParent,		0x2c);
+ARC_Call(Bios_GetConfigurationData,	0x30);
+ARC_Call(Bios_AddChild,			0x34);
+ARC_Call(Bios_DeleteComponent,		0x38);
+ARC_Call(Bios_GetComponent,		0x3c);
+ARC_Call(Bios_SaveConfiguration,	0x40);
+ARC_Call(Bios_GetSystemId,		0x44);
+ARC_Call(Bios_GetMemoryDescriptor,	0x48);
+ARC_Call(Bios_Unused2,			0x4c);
+ARC_Call(Bios_GetTime,			0x50);
+ARC_Call(Bios_GetRelativeTime,		0x54);
+ARC_Call(Bios_GetDirectoryEntry,	0x58);
+ARC_Call(Bios_Open,			0x5c);
+ARC_Call(Bios_Close,			0x60);
+ARC_Call(Bios_Read,			0x64);
+ARC_Call(Bios_GetReadStatus,		0x68);
+ARC_Call(Bios_Write,			0x6c);
+ARC_Call(Bios_Seek,			0x70);
+ARC_Call(Bios_Mount,			0x74);
+ARC_Call(Bios_GetEnvironmentVariable,	0x78);
+ARC_Call(Bios_SetEnvironmentVariable,	0x7c);
+ARC_Call(Bios_GetFileInformation,	0x80);
+ARC_Call(Bios_SetFileInformation,	0x84);
+ARC_Call(Bios_FlushAllCaches,		0x88);
+ARC_Call(Bios_TestUnicodeCharacter,	0x8c);
+ARC_Call(Bios_GetDisplayStatus,		0x90);
+
+/*
+ *	Simple getchar/putchar interface.
+ */
+
+int
+bios_getchar()
+{
+	char buf[4];
+	int  cnt;
+
+	if (Bios_Read(0, &buf[0], 1, &cnt) != 0)
+		return(-1);
+	return(buf[0] & 255);
+}
+
+void
+bios_putchar(c)
+char c;
+{
+	char buf[4];
+	int  cnt;
+
+	if (c == '\n') {
+		buf[0] = '\r';
+		buf[1] = c;
+		cnt = 2;
+		if (displayinfo.CursorYPosition < displayinfo.CursorMaxYPosition)
+			displayinfo.CursorYPosition++;
+	}
+	else {
+		buf[0] = c;
+		cnt = 1;
+	}
+	Bios_Write(1, &buf[0], cnt, &cnt);
+}
+
+void
+bios_putstring(s)
+char *s;
+{
+	while (*s) {
+		bios_putchar(*s++);
+	}
+}
+
+/*
+ * Get memory descriptor for the memory configuration and
+ * create a layout database used by pmap init to set up
+ * the memory system. Note that kernel option "MACHINE_NONCONTIG"
+ * must be set for systems with non contigous physical memory.
+ *
+ * Concatenate obvious adjecent segments.
+ */
+void
+bios_configure_memory()
+{
+	arc_mem_t *descr = 0;
+	struct phys_mem_desc *m;
+	vaddr_t seg_start, seg_end;
+	int	i;
+	char str[100];
+
+	descr = (arc_mem_t *)Bios_GetMemoryDescriptor(descr);
+	while(descr != 0) {
+
+		seg_start = descr->BasePage;
+		seg_end = seg_start + descr->PageCount;
+
+		switch (descr->Type) {
+		case BadMemory:		/* Have no use for theese */
+			break;
+
+#if 0
+		case ExeceptionBlock:
+		case SystemParameterBlock:
+		case FirmwareTemporary:
+		case FirmwarePermanent:
+#endif
+		case FreeMemory:
+		case FreeContigous:
+			physmem += descr->PageCount;
+			m = 0;
+			for (i = 0; i < MAXMEMSEGS; i++) {
+				if (mem_layout[i].mem_last_page == 0) {
+					if (m == 0)
+						m = &mem_layout[i]; /* free */
+				}
+				else if (seg_end == mem_layout[i].mem_first_page) {
+					m = &mem_layout[i];
+					m->mem_first_page = seg_start;
+				}
+				else if (mem_layout[i].mem_last_page == seg_start) {
+					m = &mem_layout[i];
+					m->mem_last_page = seg_end;
+				}
+			}
+			if (m && m->mem_first_page == 0) {
+				m->mem_first_page = seg_start;
+				m->mem_last_page = seg_end;
+			}
+			break;
+
+		case LoadedProgram:	/* This is the loaded kernel */
+			physmem += descr->PageCount;
+			break;
+
+		default:		/* Unknown type, leave it alone... */
+			break;
+		}
+		descr = (arc_mem_t *)Bios_GetMemoryDescriptor(descr);
+	}
+
+#ifdef DEBUG_MEM_LAYOUT
+	for ( i = 0; i < MAXMEMSEGS; i++) {
+		if (mem_layout[i].mem_first_page) {
+			snprintf(str, sizeof(str), "MEM %d, 0x%x to  0x%x\n",i,
+				mem_layout[i].mem_first_page * 4096,
+				mem_layout[i].mem_last_page * 4096);
+			bios_putstring(str);
+	    }
+	}
+#endif
+}
+
+/*
+ * Find out system type.
+ */
+int
+bios_get_system_type()
+{
+	arc_config_t	*cf;
+	arc_sid_t	*sid;
+	int		i;
+
+	if ((bios_base->magic != ARC_PARAM_BLK_MAGIC) &&
+	    (bios_base->magic != ARC_PARAM_BLK_MAGIC_BUG)) {
+		return(-1);	/* This is not an ARC system */
+	}
+
+	sid = (arc_sid_t *)Bios_GetSystemId();
+	cf = (arc_config_t *)Bios_GetChild(NULL);
+	if (cf) {
+		for (i = 0; i < KNOWNSYSTEMS; i++) {
+			if (strcmp(sys_types[i].sys_name, cf->id) != 0)
+				continue;
+			if (sys_types[i].sys_vend &&
+			    strncmp(sys_types[i].sys_vend, sid->vendor, 8) != 0)
+				continue;
+			return (sys_types[i].sys_type);	/* Found it. */
+		}
+	}
+
+	bios_putstring("UNIDENTIFIED SYSTEM `");
+	if (cf)
+		bios_putstring(cf->id);
+	else
+		bios_putstring("????????");
+	bios_putstring("' VENDOR `");
+	sid->vendor[8] = 0;
+	bios_putstring(sid->vendor);
+	bios_putstring("'. Please contact OpenBSD (www.openbsd.org).\n");
+	bios_putstring("Reset system to restart!\n");
+	while(1);
+}
+
+/*
+ * Incomplete version of bios_ident
+ */
+void
+bios_ident()
+{
+	sys_config.system_type = bios_get_system_type();
+	if (sys_config.system_type < 0) {
+		return;
+	}
+	bios_configure_memory();
+#ifdef __arc__
+	displayinfo = *(arc_dsp_stat_t *)Bios_GetDisplayStatus(1);
+#endif
+}
+
+/*
+ * Return geometry of the display. Used by pccons.c to set up the
+ * display configuration.
+ */
+void
+bios_display_info(xpos, ypos, xsize, ysize)
+    int	*xpos;
+    int	*ypos;
+    int *xsize;
+    int *ysize;
+{
+#ifdef __arc__
+	*xpos = displayinfo.CursorXPosition;
+	*ypos = displayinfo.CursorYPosition;
+	*xsize = displayinfo.CursorMaxXPosition;
+	*ysize = displayinfo.CursorMaxYPosition;
+#endif
+}
+