Resguardo inicial

linux-7.2.3/arch/mips/fw/arc/Makefile

@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the ARC prom monitor library routines under Linux.
+#
+
+ifdef CONFIG_ARC_CMDLINE_ONLY
+lib-y				+= cmdline.o
+else
+lib-y				+= cmdline.o env.o file.o identify.o init.o \
+				   misc.o
+endif
+
+lib-$(CONFIG_ARC_MEMORY)	+= memory.o
+lib-$(CONFIG_ARC_CONSOLE)	+= arc_con.o
+lib-$(CONFIG_ARC_PROMLIB)	+= promlib.o

linux-7.2.3/arch/mips/fw/arc/arc_con.c

@@ -0,0 +1,54 @@
+// 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)
+{
+	if (prom_flags & PROM_FLAG_USE_AS_CONSOLE)
+		return 0;
+	return -ENODEV;
+}
+
+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);

linux-7.2.3/arch/mips/fw/arc/cmdline.c

@@ -0,0 +1,114 @@
+/*
+ * 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
+
+/*
+ * A 32-bit ARC PROM pass arguments and environment as 32-bit pointer.
+ * These macro take care of sign extension.
+ */
+#define prom_argv(index) ((char *) (long)argv[(index)])
+
+static char *ignored[] = {
+	"ConsoleIn=",
+	"ConsoleOut=",
+	"SystemPartition=",
+	"OSLoader=",
+	"OSLoadPartition=",
+	"OSLoadFilename=",
+	"OSLoadOptions="
+};
+
+static char *used_arc[][2] = {
+	{ "OSLoadPartition=", "root=" },
+	{ "OSLoadOptions=", "" }
+};
+
+static char __init *move_firmware_args(int argc, LONG *argv, char *cp)
+{
+	char *s;
+	int actr, i;
+	size_t len;
+
+	actr = 1; /* Always ignore argv[0] */
+
+	while (actr < argc) {
+		for (i = 0; i < ARRAY_SIZE(used_arc); i++) {
+			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++;
+					len = strlen(s);
+					memcpy(cp, s, len + 1);
+					cp += len;
+				}
+				*cp++ = ' ';
+				break;
+			}
+		}
+		actr++;
+	}
+
+	return cp;
+}
+
+void __init prom_init_cmdline(int argc, LONG *argv)
+{
+	char *cp;
+	int actr, i;
+	size_t len;
+
+	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(argc, argv, cp);
+
+	while (actr < argc) {
+		for (i = 0; i < ARRAY_SIZE(ignored); i++) {
+			len = strlen(ignored[i]);
+			if (!strncmp(prom_argv(actr), ignored[i], len))
+				goto pic_cont;
+		}
+
+		/* Ok, we want it. */
+		len = strlen(prom_argv(actr));
+		memcpy(cp, prom_argv(actr), len + 1);
+		cp += len;
+		*cp++ = ' ';
+
+	pic_cont:
+		actr++;
+	}
+
+	if (cp != arcs_cmdline)		/* get rid of trailing space */
+		--cp;
+	*cp = '\0';
+
+#ifdef DEBUG_CMDLINE
+	pr_debug("prom cmdline: %s\n", arcs_cmdline);
+#endif
+}

linux-7.2.3/arch/mips/fw/arc/env.c

@@ -0,0 +1,21 @@
+/*
+ * 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);
+}

linux-7.2.3/arch/mips/fw/arc/file.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.
+ *
+ * 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
+ArcRead(ULONG FileID, VOID *Buffer, ULONG N, ULONG *Count)
+{
+	return ARC_CALL4(read, FileID, Buffer, N, Count);
+}
+
+LONG
+ArcWrite(ULONG FileID, PVOID Buffer, ULONG N, PULONG Count)
+{
+	return ARC_CALL4(write, FileID, Buffer, N, Count);
+}

linux-7.2.3/arch/mips/fw/arc/identify.c

@@ -0,0 +1,111 @@
+/*
+ * 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-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;
+}
+
+static pcomponent * __init ArcGetChild(pcomponent *Current)
+{
+	return (pcomponent *) ARC_CALL1(child_component, Current);
+}
+
+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) {
+		iname = "Unknown";
+	} else
+		iname = (char *) (long) p->iname;
+
+	printk("ARCH: %s\n", iname);
+	mach = string_to_mach(iname);
+	system_type = mach->liname;
+
+	prom_flags = mach->flags;
+}

linux-7.2.3/arch/mips/fw/arc/init.c

@@ -0,0 +1,51 @@
+/*
+ * 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;
+
+#if defined(CONFIG_64BIT) && defined(CONFIG_FW_ARC32)
+/* stack for calling 32bit ARC prom */
+u64 o32_stk[4096];
+#endif
+
+void __init prom_init(void)
+{
+	PSYSTEM_PARAMETER_BLOCK pb = PROMBLOCK;
+
+	romvec = ROMVECTOR;
+
+	if (pb->magic != 0x53435241) {
+		printk(KERN_CRIT "Aieee, bad prom vector magic %08lx\n",
+		       (unsigned long) pb->magic);
+		while(1)
+			;
+	}
+
+	prom_init_cmdline(fw_arg0, (LONG *)fw_arg1);
+	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
+}

linux-7.2.3/arch/mips/fw/arc/memory.c

@@ -0,0 +1,192 @@
+// 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/memblock.h>
+#include <linux/swap.h>
+
+#include <asm/sgialib.h>
+#include <asm/page.h>
+#include <asm/bootinfo.h>
+
+#undef DEBUG
+
+#define MAX_PROM_MEM 5
+static phys_addr_t prom_mem_base[MAX_PROM_MEM] __initdata;
+static phys_addr_t prom_mem_size[MAX_PROM_MEM] __initdata;
+static unsigned int nr_prom_mem __initdata;
+
+/*
+ * For ARC firmware memory functions the unit of measuring memory is always
+ * a 4k page of memory
+ */
+#define ARC_PAGE_SHIFT	12
+
+static 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
+
+enum {
+	mem_free, mem_prom_used, mem_reserved
+};
+
+static inline int memtype_classify_arcs(union linux_memtypes type)
+{
+	switch (type.arcs) {
+	case arcs_fcontig:
+	case arcs_free:
+		return mem_free;
+	case arcs_atmp:
+		return mem_prom_used;
+	case arcs_eblock:
+	case arcs_rvpage:
+	case arcs_bmem:
+	case arcs_prog:
+	case arcs_aperm:
+		return 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 mem_free;
+	case arc_atmp:
+		return mem_prom_used;
+	case arc_eblock:
+	case arc_rvpage:
+	case arc_bmem:
+	case arc_prog:
+	case arc_aperm:
+		return 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 __weak __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
+
+	nr_prom_mem = 0;
+	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);
+
+		/* ignore mirrored RAM on IP28/IP30 */
+		if (base < PHYS_OFFSET)
+			continue;
+
+		memblock_add(base, size);
+
+		if (type == mem_reserved)
+			memblock_reserve(base, size);
+
+		if (type == mem_prom_used) {
+			memblock_reserve(base, size);
+			if (nr_prom_mem >= 5) {
+				pr_err("Too many ROM DATA regions");
+				continue;
+			}
+			prom_mem_base[nr_prom_mem] = base;
+			prom_mem_size[nr_prom_mem] = size;
+			nr_prom_mem++;
+		}
+	}
+}
+
+void __weak __init prom_cleanup(void)
+{
+}
+
+void __init prom_free_prom_memory(void)
+{
+	int i;
+
+	if (prom_flags & PROM_FLAG_DONT_FREE_TEMP)
+		return;
+
+	for (i = 0; i < nr_prom_mem; i++) {
+		free_init_pages("prom memory",
+			prom_mem_base[i], prom_mem_base[i] + prom_mem_size[i]);
+	}
+	/*
+	 * at this point it isn't safe to call PROM functions
+	 * give platforms a way to do PROM cleanups
+	 */
+	prom_cleanup();
+}

linux-7.2.3/arch/mips/fw/arc/misc.c

@@ -0,0 +1,36 @@
+/*
+ * 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
+ArcEnterInteractiveMode(VOID)
+{
+	bc_disable();
+	local_irq_disable();
+	ARC_CALL0(imode);
+
+	unreachable();
+}
+
+DISPLAY_STATUS * __init ArcGetDisplayStatus(ULONG FileID)
+{
+	return (DISPLAY_STATUS *) ARC_CALL1(GetDisplayStatus, FileID);
+}

linux-7.2.3/arch/mips/fw/arc/promlib.c

@@ -0,0 +1,61 @@
+/*
+ * 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>
+
+#if defined(CONFIG_64BIT) && defined(CONFIG_FW_ARC32)
+/*
+ * For 64bit kernels working with a 32bit ARC PROM pointer arguments
+ * for ARC calls need to reside in CKEG0/1. But as soon as the kernel
+ * switches to its first kernel thread stack is set to an address in
+ * XKPHYS, so anything on stack can't be used anymore. This is solved
+ * by using a * static declaration variables are put into BSS, which is
+ * linked to a CKSEG0 address. Since this is only used on UP platforms
+ * there is no spinlock needed
+ */
+#define O32_STATIC	static
+#else
+#define O32_STATIC
+#endif
+
+/*
+ * 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)
+{
+	O32_STATIC ULONG cnt;
+	O32_STATIC CHAR it;
+
+	it = c;
+
+	bc_disable();
+	ArcWrite(1, &it, 1, &cnt);
+	bc_enable();
+}
+
+char prom_getchar(void)
+{
+	O32_STATIC ULONG cnt;
+	O32_STATIC CHAR c;
+
+	bc_disable();
+	ArcRead(0, &c, 1, &cnt);
+	bc_enable();
+
+	return c;
+}