Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

13 files changed, 920 insertions, 0 deletions

diff --git a/arch/mips/fw/arc/Makefile b/arch/mips/fw/arc/Makefile
new file mode 100644
index 000000000..31dd7305d
--- /dev/null
+++ b/arch/mips/fw/arc/Makefile
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the ARC prom monitor library routines under Linux.
+#
+
+lib-y				+= cmdline.o env.o file.o identify.o init.o \
+				   misc.o salone.o time.o tree.o
+
+lib-$(CONFIG_ARC_MEMORY)	+= memory.o
+lib-$(CONFIG_ARC_CONSOLE)	+= arc_con.o
+lib-$(CONFIG_ARC_PROMLIB)	+= promlib.o
diff --git a/arch/mips/fw/arc/arc_con.c b/arch/mips/fw/arc/arc_con.c
new file mode 100644
index 000000000..365e39132
--- /dev/null
+++ b/arch/mips/fw/arc/arc_con.c
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Wrap-around code for a console using the
+ * ARC io-routines.
+ *
+ * Copyright (c) 1998 Harald Koerfgen
+ * Copyright (c) 2001 Ralf Baechle
+ * Copyright (c) 2002 Thiemo Seufer
+ */
+#include <linux/tty.h>
+#include <linux/major.h>
+#include <linux/init.h>
+#include <linux/console.h>
+#include <linux/fs.h>
+#include <asm/setup.h>
+#include <asm/sgialib.h>
+
+static void prom_console_write(struct console *co, const char *s,
+			       unsigned count)
+{
+	/* Do each character */
+	while (count--) {
+		if (*s == '\n')
+			prom_putchar('\r');
+		prom_putchar(*s++);
+	}
+}
+
+static int prom_console_setup(struct console *co, char *options)
+{
+	return !(prom_flags & PROM_FLAG_USE_AS_CONSOLE);
+}
+
+static struct console arc_cons = {
+	.name		= "arc",
+	.write		= prom_console_write,
+	.setup		= prom_console_setup,
+	.flags		= CON_PRINTBUFFER,
+	.index		= -1,
+};
+
+/*
+ *    Register console.
+ */
+
+static int __init arc_console_init(void)
+{
+	register_console(&arc_cons);
+
+	return 0;
+}
+console_initcall(arc_console_init);
diff --git a/arch/mips/fw/arc/cmdline.c b/arch/mips/fw/arc/cmdline.c
new file mode 100644
index 000000000..c0122a1dc
--- /dev/null
+++ b/arch/mips/fw/arc/cmdline.c
@@ -0,0 +1,104 @@
+/*
+ * 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.
+ *
+ * cmdline.c: Kernel command line creation using ARCS argc/argv.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
+ */
+#include <linux/bug.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+
+#include <asm/sgialib.h>
+#include <asm/bootinfo.h>
+
+#undef DEBUG_CMDLINE
+
+static char *ignored[] = {
+	"ConsoleIn=",
+	"ConsoleOut=",
+	"SystemPartition=",
+	"OSLoader=",
+	"OSLoadPartition=",
+	"OSLoadFilename=",
+	"OSLoadOptions="
+};
+
+static char *used_arc[][2] = {
+	{ "OSLoadPartition=", "root=" },
+	{ "OSLoadOptions=", "" }
+};
+
+static char * __init move_firmware_args(char* cp)
+{
+	char *s;
+	int actr, i;
+
+	actr = 1; /* Always ignore argv[0] */
+
+	while (actr < prom_argc) {
+		for(i = 0; i < ARRAY_SIZE(used_arc); i++) {
+			int len = strlen(used_arc[i][0]);
+
+			if (!strncmp(prom_argv(actr), used_arc[i][0], len)) {
+			/* Ok, we want it. First append the replacement... */
+				strcat(cp, used_arc[i][1]);
+				cp += strlen(used_arc[i][1]);
+				/* ... and now the argument */
+				s = strchr(prom_argv(actr), '=');
+				if (s) {
+					s++;
+					strcpy(cp, s);
+					cp += strlen(s);
+				}
+				*cp++ = ' ';
+				break;
+			}
+		}
+		actr++;
+	}
+
+	return cp;
+}
+
+void __init prom_init_cmdline(void)
+{
+	char *cp;
+	int actr, i;
+
+	actr = 1; /* Always ignore argv[0] */
+
+	cp = arcs_cmdline;
+	/*
+	 * Move ARC variables to the beginning to make sure they can be
+	 * overridden by later arguments.
+	 */
+	cp = move_firmware_args(cp);
+
+	while (actr < prom_argc) {
+		for (i = 0; i < ARRAY_SIZE(ignored); i++) {
+			int len = strlen(ignored[i]);
+
+			if (!strncmp(prom_argv(actr), ignored[i], len))
+				goto pic_cont;
+		}
+		/* Ok, we want it. */
+		strcpy(cp, prom_argv(actr));
+		cp += strlen(prom_argv(actr));
+		*cp++ = ' ';
+
+	pic_cont:
+		actr++;
+	}
+
+	if (cp != arcs_cmdline)		/* get rid of trailing space */
+		--cp;
+	*cp = '\0';
+
+#ifdef DEBUG_CMDLINE
+	printk(KERN_DEBUG "prom cmdline: %s\n", arcs_cmdline);
+#endif
+}
diff --git a/arch/mips/fw/arc/env.c b/arch/mips/fw/arc/env.c
new file mode 100644
index 000000000..1118a26b3
--- /dev/null
+++ b/arch/mips/fw/arc/env.c
@@ -0,0 +1,27 @@
+/*
+ * 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.
+ *
+ * env.c: ARCS environment variable routines.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+
+#include <asm/fw/arc/types.h>
+#include <asm/sgialib.h>
+
+PCHAR __init
+ArcGetEnvironmentVariable(CHAR *name)
+{
+	return (CHAR *) ARC_CALL1(get_evar, name);
+}
+
+LONG __init
+ArcSetEnvironmentVariable(PCHAR name, PCHAR value)
+{
+	return ARC_CALL2(set_evar, name, value);
+}
diff --git a/arch/mips/fw/arc/file.c b/arch/mips/fw/arc/file.c
new file mode 100644
index 000000000..49fd3ff13
--- /dev/null
+++ b/arch/mips/fw/arc/file.c
@@ -0,0 +1,74 @@
+/*
+ * 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.
+ *
+ * ARC firmware interface.
+ *
+ * Copyright (C) 1994, 1995, 1996, 1999 Ralf Baechle
+ * Copyright (C) 1999 Silicon Graphics, Inc.
+ */
+
+#include <asm/fw/arc/types.h>
+#include <asm/sgialib.h>
+
+LONG
+ArcGetDirectoryEntry(ULONG FileID, struct linux_vdirent *Buffer,
+		     ULONG N, ULONG *Count)
+{
+	return ARC_CALL4(get_vdirent, FileID, Buffer, N, Count);
+}
+
+LONG
+ArcOpen(CHAR *Path, enum linux_omode OpenMode, ULONG *FileID)
+{
+	return ARC_CALL3(open, Path, OpenMode, FileID);
+}
+
+LONG
+ArcClose(ULONG FileID)
+{
+	return ARC_CALL1(close, FileID);
+}
+
+LONG
+ArcRead(ULONG FileID, VOID *Buffer, ULONG N, ULONG *Count)
+{
+	return ARC_CALL4(read, FileID, Buffer, N, Count);
+}
+
+LONG
+ArcGetReadStatus(ULONG FileID)
+{
+	return ARC_CALL1(get_rstatus, FileID);
+}
+
+LONG
+ArcWrite(ULONG FileID, PVOID Buffer, ULONG N, PULONG Count)
+{
+	return ARC_CALL4(write, FileID, Buffer, N, Count);
+}
+
+LONG
+ArcSeek(ULONG FileID, struct linux_bigint *Position, enum linux_seekmode SeekMode)
+{
+	return ARC_CALL3(seek, FileID, Position, SeekMode);
+}
+
+LONG
+ArcMount(char *name, enum linux_mountops op)
+{
+	return ARC_CALL2(mount, name, op);
+}
+
+LONG
+ArcGetFileInformation(ULONG FileID, struct linux_finfo *Information)
+{
+	return ARC_CALL2(get_finfo, FileID, Information);
+}
+
+LONG ArcSetFileInformation(ULONG FileID, ULONG AttributeFlags,
+			   ULONG AttributeMask)
+{
+	return ARC_CALL3(set_finfo, FileID, AttributeFlags, AttributeMask);
+}
diff --git a/arch/mips/fw/arc/identify.c b/arch/mips/fw/arc/identify.c
new file mode 100644
index 000000000..f90266c02
--- /dev/null
+++ b/arch/mips/fw/arc/identify.c
@@ -0,0 +1,116 @@
+/*
+ * 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.
+ *
+ * identify.c: identify machine by looking up system identifier
+ *
+ * Copyright (C) 1998 Thomas Bogendoerfer
+ *
+ * This code is based on arch/mips/sgi/kernel/system.c, which is
+ *
+ * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
+ */
+#include <linux/bug.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/string.h>
+
+#include <asm/sgialib.h>
+#include <asm/bootinfo.h>
+
+struct smatch {
+	char *arcname;
+	char *liname;
+	int flags;
+};
+
+static struct smatch mach_table[] = {
+	{
+		.arcname	= "SGI-IP22",
+		.liname		= "SGI Indy",
+		.flags		= PROM_FLAG_ARCS,
+	}, {
+		.arcname	= "SGI-IP27",
+		.liname		= "SGI Origin",
+		.flags		= PROM_FLAG_ARCS,
+	}, {
+		.arcname	= "SGI-IP28",
+		.liname		= "SGI IP28",
+		.flags		= PROM_FLAG_ARCS,
+	}, {
+		.arcname	= "SGI-IP30",
+		.liname		= "SGI Octane",
+		.flags		= PROM_FLAG_ARCS,
+	}, {
+		.arcname	= "SGI-IP32",
+		.liname		= "SGI O2",
+		.flags		= PROM_FLAG_ARCS,
+	}, {
+		.arcname	= "Microsoft-Jazz",
+		.liname		= "Jazz MIPS_Magnum_4000",
+		.flags		= 0,
+	}, {
+		.arcname	= "PICA-61",
+		.liname		= "Jazz Acer_PICA_61",
+		.flags		= 0,
+	}, {
+		.arcname	= "RM200PCI",
+		.liname		= "SNI RM200_PCI",
+		.flags		= PROM_FLAG_DONT_FREE_TEMP,
+	}, {
+		.arcname	= "RM200PCI-R5K",
+		.liname		= "SNI RM200_PCI-R5K",
+		.flags		= PROM_FLAG_DONT_FREE_TEMP,
+	}
+};
+
+int prom_flags;
+
+static struct smatch * __init string_to_mach(const char *s)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(mach_table); i++) {
+		if (!strcmp(s, mach_table[i].arcname))
+			return &mach_table[i];
+	}
+
+	panic("Yeee, could not determine architecture type <%s>", s);
+}
+
+char *system_type;
+
+const char *get_system_type(void)
+{
+	return system_type;
+}
+
+void __init prom_identify_arch(void)
+{
+	pcomponent *p;
+	struct smatch *mach;
+	const char *iname;
+
+	/*
+	 * The root component tells us what machine architecture we have here.
+	 */
+	p = ArcGetChild(PROM_NULL_COMPONENT);
+	if (p == NULL) {
+#ifdef CONFIG_SGI_IP27
+		/* IP27 PROM misbehaves, seems to not implement ARC
+		   GetChild().	So we just assume it's an IP27.	 */
+		iname = "SGI-IP27";
+#else
+		iname = "Unknown";
+#endif
+	} else
+		iname = (char *) (long) p->iname;
+
+	printk("ARCH: %s\n", iname);
+	mach = string_to_mach(iname);
+	system_type = mach->liname;
+
+	prom_flags = mach->flags;
+}
diff --git a/arch/mips/fw/arc/init.c b/arch/mips/fw/arc/init.c
new file mode 100644
index 000000000..008555969
--- /dev/null
+++ b/arch/mips/fw/arc/init.c
@@ -0,0 +1,59 @@
+/*
+ * 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.
+ *
+ * PROM library initialisation code.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+
+#include <asm/bootinfo.h>
+#include <asm/sgialib.h>
+#include <asm/smp-ops.h>
+
+#undef DEBUG_PROM_INIT
+
+/* Master romvec interface. */
+struct linux_romvec *romvec;
+int prom_argc;
+LONG *_prom_argv, *_prom_envp;
+
+void __init prom_init(void)
+{
+	PSYSTEM_PARAMETER_BLOCK pb = PROMBLOCK;
+
+	romvec = ROMVECTOR;
+
+	prom_argc = fw_arg0;
+	_prom_argv = (LONG *) fw_arg1;
+	_prom_envp = (LONG *) fw_arg2;
+
+	if (pb->magic != 0x53435241) {
+		printk(KERN_CRIT "Aieee, bad prom vector magic %08lx\n",
+		       (unsigned long) pb->magic);
+		while(1)
+			;
+	}
+
+	prom_init_cmdline();
+	prom_identify_arch();
+	printk(KERN_INFO "PROMLIB: ARC firmware Version %d Revision %d\n",
+	       pb->ver, pb->rev);
+	prom_meminit();
+
+#ifdef DEBUG_PROM_INIT
+	pr_info("Press a key to reboot\n");
+	ArcRead(0, &c, 1, &cnt);
+	ArcEnterInteractiveMode();
+#endif
+#ifdef CONFIG_SGI_IP27
+	{
+		extern const struct plat_smp_ops ip27_smp_ops;
+
+		register_smp_ops(&ip27_smp_ops);
+	}
+#endif
+}
diff --git a/arch/mips/fw/arc/memory.c b/arch/mips/fw/arc/memory.c
new file mode 100644
index 000000000..dd9496f26
--- /dev/null
+++ b/arch/mips/fw/arc/memory.c
@@ -0,0 +1,161 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * memory.c: PROM library functions for acquiring/using memory descriptors
+ *	     given to us from the ARCS firmware.
+ *
+ * Copyright (C) 1996 by David S. Miller
+ * Copyright (C) 1999, 2000, 2001 by Ralf Baechle
+ * Copyright (C) 1999, 2000 by Silicon Graphics, Inc.
+ *
+ * PROM library functions for acquiring/using memory descriptors given to us
+ * from the ARCS firmware.  This is only used when CONFIG_ARC_MEMORY is set
+ * because on some machines like SGI IP27 the ARC memory configuration data
+ * completely bogus and alternate easier to use mechanisms are available.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/bootmem.h>
+#include <linux/swap.h>
+
+#include <asm/sgialib.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/bootinfo.h>
+
+#undef DEBUG
+
+/*
+ * For ARC firmware memory functions the unit of meassuring memory is always
+ * a 4k page of memory
+ */
+#define ARC_PAGE_SHIFT	12
+
+struct linux_mdesc * __init ArcGetMemoryDescriptor(struct linux_mdesc *Current)
+{
+	return (struct linux_mdesc *) ARC_CALL1(get_mdesc, Current);
+}
+
+#ifdef DEBUG /* convenient for debugging */
+static char *arcs_mtypes[8] = {
+	"Exception Block",
+	"ARCS Romvec Page",
+	"Free/Contig RAM",
+	"Generic Free RAM",
+	"Bad Memory",
+	"Standalone Program Pages",
+	"ARCS Temp Storage Area",
+	"ARCS Permanent Storage Area"
+};
+
+static char *arc_mtypes[8] = {
+	"Exception Block",
+	"SystemParameterBlock",
+	"FreeMemory",
+	"Bad Memory",
+	"LoadedProgram",
+	"FirmwareTemporary",
+	"FirmwarePermanent",
+	"FreeContiguous"
+};
+#define mtypes(a) (prom_flags & PROM_FLAG_ARCS) ? arcs_mtypes[a.arcs] \
+						: arc_mtypes[a.arc]
+#endif
+
+static inline int memtype_classify_arcs(union linux_memtypes type)
+{
+	switch (type.arcs) {
+	case arcs_fcontig:
+	case arcs_free:
+		return BOOT_MEM_RAM;
+	case arcs_atmp:
+		return BOOT_MEM_ROM_DATA;
+	case arcs_eblock:
+	case arcs_rvpage:
+	case arcs_bmem:
+	case arcs_prog:
+	case arcs_aperm:
+		return BOOT_MEM_RESERVED;
+	default:
+		BUG();
+	}
+	while(1);				/* Nuke warning.  */
+}
+
+static inline int memtype_classify_arc(union linux_memtypes type)
+{
+	switch (type.arc) {
+	case arc_free:
+	case arc_fcontig:
+		return BOOT_MEM_RAM;
+	case arc_atmp:
+		return BOOT_MEM_ROM_DATA;
+	case arc_eblock:
+	case arc_rvpage:
+	case arc_bmem:
+	case arc_prog:
+	case arc_aperm:
+		return BOOT_MEM_RESERVED;
+	default:
+		BUG();
+	}
+	while(1);				/* Nuke warning.  */
+}
+
+static int __init prom_memtype_classify(union linux_memtypes type)
+{
+	if (prom_flags & PROM_FLAG_ARCS)	/* SGI is ``different'' ... */
+		return memtype_classify_arcs(type);
+
+	return memtype_classify_arc(type);
+}
+
+void __init prom_meminit(void)
+{
+	struct linux_mdesc *p;
+
+#ifdef DEBUG
+	int i = 0;
+
+	printk("ARCS MEMORY DESCRIPTOR dump:\n");
+	p = ArcGetMemoryDescriptor(PROM_NULL_MDESC);
+	while(p) {
+		printk("[%d,%p]: base<%08lx> pages<%08lx> type<%s>\n",
+		       i, p, p->base, p->pages, mtypes(p->type));
+		p = ArcGetMemoryDescriptor(p);
+		i++;
+	}
+#endif
+
+	p = PROM_NULL_MDESC;
+	while ((p = ArcGetMemoryDescriptor(p))) {
+		unsigned long base, size;
+		long type;
+
+		base = p->base << ARC_PAGE_SHIFT;
+		size = p->pages << ARC_PAGE_SHIFT;
+		type = prom_memtype_classify(p->type);
+
+		add_memory_region(base, size, type);
+	}
+}
+
+void __init prom_free_prom_memory(void)
+{
+	unsigned long addr;
+	int i;
+
+	if (prom_flags & PROM_FLAG_DONT_FREE_TEMP)
+		return;
+
+	for (i = 0; i < boot_mem_map.nr_map; i++) {
+		if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA)
+			continue;
+
+		addr = boot_mem_map.map[i].addr;
+		free_init_pages("prom memory",
+				addr, addr + boot_mem_map.map[i].size);
+	}
+}
diff --git a/arch/mips/fw/arc/misc.c b/arch/mips/fw/arc/misc.c
new file mode 100644
index 000000000..19f710117
--- /dev/null
+++ b/arch/mips/fw/arc/misc.c
@@ -0,0 +1,95 @@
+/*
+ * 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 ARCS PROM routines.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
+ * Copyright (C) 1999 Ralf Baechle (ralf@gnu.org)
+ * Copyright (C) 1999 Silicon Graphics, Inc.
+ */
+#include <linux/compiler.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/irqflags.h>
+
+#include <asm/bcache.h>
+
+#include <asm/fw/arc/types.h>
+#include <asm/sgialib.h>
+#include <asm/bootinfo.h>
+
+VOID __noreturn
+ArcHalt(VOID)
+{
+	bc_disable();
+	local_irq_disable();
+	ARC_CALL0(halt);
+
+	unreachable();
+}
+
+VOID __noreturn
+ArcPowerDown(VOID)
+{
+	bc_disable();
+	local_irq_disable();
+	ARC_CALL0(pdown);
+
+	unreachable();
+}
+
+/* XXX is this a soft reset basically? XXX */
+VOID __noreturn
+ArcRestart(VOID)
+{
+	bc_disable();
+	local_irq_disable();
+	ARC_CALL0(restart);
+
+	unreachable();
+}
+
+VOID __noreturn
+ArcReboot(VOID)
+{
+	bc_disable();
+	local_irq_disable();
+	ARC_CALL0(reboot);
+
+	unreachable();
+}
+
+VOID __noreturn
+ArcEnterInteractiveMode(VOID)
+{
+	bc_disable();
+	local_irq_disable();
+	ARC_CALL0(imode);
+
+	unreachable();
+}
+
+LONG
+ArcSaveConfiguration(VOID)
+{
+	return ARC_CALL0(cfg_save);
+}
+
+struct linux_sysid *
+ArcGetSystemId(VOID)
+{
+	return (struct linux_sysid *) ARC_CALL0(get_sysid);
+}
+
+VOID __init
+ArcFlushAllCaches(VOID)
+{
+	ARC_CALL0(cache_flush);
+}
+
+DISPLAY_STATUS * __init ArcGetDisplayStatus(ULONG FileID)
+{
+	return (DISPLAY_STATUS *) ARC_CALL1(GetDisplayStatus, FileID);
+}
diff --git a/arch/mips/fw/arc/promlib.c b/arch/mips/fw/arc/promlib.c
new file mode 100644
index 000000000..be381307f
--- /dev/null
+++ b/arch/mips/fw/arc/promlib.c
@@ -0,0 +1,44 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@sgi.com)
+ * Compatibility with board caches, Ulf Carlsson
+ */
+#include <linux/kernel.h>
+#include <asm/sgialib.h>
+#include <asm/bcache.h>
+#include <asm/setup.h>
+
+/*
+ * IP22 boardcache is not compatible with board caches.	 Thus we disable it
+ * during romvec action.  Since r4xx0.c is always compiled and linked with your
+ * kernel, this shouldn't cause any harm regardless what MIPS processor you
+ * have.
+ *
+ * The ARC write and read functions seem to interfere with the serial lines
+ * in some way. You should be careful with them.
+ */
+
+void prom_putchar(char c)
+{
+	ULONG cnt;
+	CHAR it = c;
+
+	bc_disable();
+	ArcWrite(1, &it, 1, &cnt);
+	bc_enable();
+}
+
+char prom_getchar(void)
+{
+	ULONG cnt;
+	CHAR c;
+
+	bc_disable();
+	ArcRead(0, &c, 1, &cnt);
+	bc_enable();
+
+	return c;
+}
diff --git a/arch/mips/fw/arc/salone.c b/arch/mips/fw/arc/salone.c
new file mode 100644
index 000000000..2d99f44d5
--- /dev/null
+++ b/arch/mips/fw/arc/salone.c
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Routines to load into memory and execute stand-along program images using
+ * ARCS PROM firmware.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
+ */
+#include <linux/init.h>
+#include <asm/sgialib.h>
+
+LONG __init ArcLoad(CHAR *Path, ULONG TopAddr, ULONG *ExecAddr, ULONG *LowAddr)
+{
+	return ARC_CALL4(load, Path, TopAddr, ExecAddr, LowAddr);
+}
+
+LONG __init ArcInvoke(ULONG ExecAddr, ULONG StackAddr, ULONG Argc, CHAR *Argv[],
+	CHAR *Envp[])
+{
+	return ARC_CALL5(invoke, ExecAddr, StackAddr, Argc, Argv, Envp);
+}
+
+LONG __init ArcExecute(CHAR *Path, LONG Argc, CHAR *Argv[], CHAR *Envp[])
+{
+	return ARC_CALL4(exec, Path, Argc, Argv, Envp);
+}
diff --git a/arch/mips/fw/arc/time.c b/arch/mips/fw/arc/time.c
new file mode 100644
index 000000000..190cdb50b
--- /dev/null
+++ b/arch/mips/fw/arc/time.c
@@ -0,0 +1,25 @@
+/*
+ * 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.
+ *
+ * Extracting time information from ARCS prom.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
+ */
+#include <linux/init.h>
+
+#include <asm/fw/arc/types.h>
+#include <asm/sgialib.h>
+
+struct linux_tinfo * __init
+ArcGetTime(VOID)
+{
+	return (struct linux_tinfo *) ARC_CALL0(get_tinfo);
+}
+
+ULONG __init
+ArcGetRelativeTime(VOID)
+{
+	return ARC_CALL0(get_rtime);
+}
diff --git a/arch/mips/fw/arc/tree.c b/arch/mips/fw/arc/tree.c
new file mode 100644
index 000000000..924a37dc2
--- /dev/null
+++ b/arch/mips/fw/arc/tree.c
@@ -0,0 +1,127 @@
+/*
+ * 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.
+ *
+ * PROM component device tree code.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
+ * Copyright (C) 1999 Ralf Baechle (ralf@gnu.org)
+ * Copyright (C) 1999 Silicon Graphics, Inc.
+ */
+#include <linux/init.h>
+#include <asm/fw/arc/types.h>
+#include <asm/sgialib.h>
+
+#undef DEBUG_PROM_TREE
+
+pcomponent * __init
+ArcGetPeer(pcomponent *Current)
+{
+	if (Current == PROM_NULL_COMPONENT)
+		return PROM_NULL_COMPONENT;
+
+	return (pcomponent *) ARC_CALL1(next_component, Current);
+}
+
+pcomponent * __init
+ArcGetChild(pcomponent *Current)
+{
+	return (pcomponent *) ARC_CALL1(child_component, Current);
+}
+
+pcomponent * __init
+ArcGetParent(pcomponent *Current)
+{
+	if (Current == PROM_NULL_COMPONENT)
+		return PROM_NULL_COMPONENT;
+
+	return (pcomponent *) ARC_CALL1(parent_component, Current);
+}
+
+LONG __init
+ArcGetConfigurationData(VOID *Buffer, pcomponent *Current)
+{
+	return ARC_CALL2(component_data, Buffer, Current);
+}
+
+pcomponent * __init
+ArcAddChild(pcomponent *Current, pcomponent *Template, VOID *ConfigurationData)
+{
+	return (pcomponent *)
+	       ARC_CALL3(child_add, Current, Template, ConfigurationData);
+}
+
+LONG __init
+ArcDeleteComponent(pcomponent *ComponentToDelete)
+{
+	return ARC_CALL1(comp_del, ComponentToDelete);
+}
+
+pcomponent * __init
+ArcGetComponent(CHAR *Path)
+{
+	return (pcomponent *)ARC_CALL1(component_by_path, Path);
+}
+
+#ifdef DEBUG_PROM_TREE
+
+static char *classes[] = {
+	"system", "processor", "cache", "adapter", "controller", "peripheral",
+	"memory"
+};
+
+static char *types[] = {
+	"arc", "cpu", "fpu", "picache", "pdcache", "sicache", "sdcache",
+	"sccache", "memdev", "eisa adapter", "tc adapter", "scsi adapter",
+	"dti adapter", "multi-func adapter", "disk controller",
+	"tp controller", "cdrom controller", "worm controller",
+	"serial controller", "net controller", "display controller",
+	"parallel controller", "pointer controller", "keyboard controller",
+	"audio controller", "misc controller", "disk peripheral",
+	"floppy peripheral", "tp peripheral", "modem peripheral",
+	"monitor peripheral", "printer peripheral", "pointer peripheral",
+	"keyboard peripheral", "terminal peripheral", "line peripheral",
+	"net peripheral", "misc peripheral", "anonymous"
+};
+
+static char *iflags[] = {
+	"bogus", "read only", "removable", "console in", "console out",
+	"input", "output"
+};
+
+static void __init
+dump_component(pcomponent *p)
+{
+	printk("[%p]:class<%s>type<%s>flags<%s>ver<%d>rev<%d>",
+	       p, classes[p->class], types[p->type],
+	       iflags[p->iflags], p->vers, p->rev);
+	printk("key<%08lx>\n\tamask<%08lx>cdsize<%d>ilen<%d>iname<%s>\n",
+	       p->key, p->amask, (int)p->cdsize, (int)p->ilen, p->iname);
+}
+
+static void __init
+traverse(pcomponent *p, int op)
+{
+	dump_component(p);
+	if(ArcGetChild(p))
+		traverse(ArcGetChild(p), 1);
+	if(ArcGetPeer(p) && op)
+		traverse(ArcGetPeer(p), 1);
+}
+
+void __init
+prom_testtree(void)
+{
+	pcomponent *p;
+
+	p = ArcGetChild(PROM_NULL_COMPONENT);
+	dump_component(p);
+	p = ArcGetChild(p);
+	while(p) {
+		dump_component(p);
+		p = ArcGetPeer(p);
+	}
+}
+
+#endif /* DEBUG_PROM_TREE  */