From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Wed, 30 Aug 2017 08:25:59 +0000
Subject: Initial file dump from open source release

---
 arch/mips/powertv/init.c | 94 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 arch/mips/powertv/init.c

(limited to 'arch/mips/powertv/init.c')

diff --git a/arch/mips/powertv/init.c b/arch/mips/powertv/init.c
new file mode 100644
index 00000000..a01baff5
--- /dev/null
+++ b/arch/mips/powertv/init.c
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 1999, 2000, 2004, 2005	 MIPS Technologies, Inc.
+ *	All rights reserved.
+ *	Authors: Carsten Langgaard <carstenl@mips.com>
+ *		 Maciej W. Rozycki <macro@mips.com>
+ * Portions copyright (C) 2009 Cisco Systems, Inc.
+ *
+ *  This program is free software; you can distribute it and/or modify it
+ *  under the terms of the GNU General Public License (Version 2) as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * PROM library initialisation code.
+ */
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+
+#include <asm/bootinfo.h>
+#include <linux/io.h>
+#include <asm/cacheflush.h>
+#include <asm/traps.h>
+
+#include <asm/mips-boards/generic.h>
+#include <asm/mach-powertv/asic.h>
+
+#include "init.h"
+
+static int *_prom_envp;
+unsigned long _prom_memsize;
+
+/*
+ * YAMON (32-bit PROM) pass arguments and environment as 32-bit pointer.
+ * This macro take care of sign extension, if running in 64-bit mode.
+ */
+#define prom_envp(index) ((char *)(long)_prom_envp[(index)])
+
+char *prom_getenv(char *envname)
+{
+	char *result = NULL;
+
+	if (_prom_envp != NULL) {
+		/*
+		 * Return a pointer to the given environment variable.
+		 * In 64-bit mode: we're using 64-bit pointers, but all pointers
+		 * in the PROM structures are only 32-bit, so we need some
+		 * workarounds, if we are running in 64-bit mode.
+		 */
+		int i, index = 0;
+
+		i = strlen(envname);
+
+		while (prom_envp(index)) {
+			if (strncmp(envname, prom_envp(index), i) == 0) {
+				result = prom_envp(index + 1);
+				break;
+			}
+			index += 2;
+		}
+	}
+
+	return result;
+}
+
+void __init prom_init(void)
+{
+	int prom_argc;
+	char *prom_argv;
+
+	prom_argc = fw_arg0;
+	prom_argv = (char *) fw_arg1;
+	_prom_envp = (int *) fw_arg2;
+	_prom_memsize = (unsigned long) fw_arg3;
+
+	if (prom_argc == 1) {
+		strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE);
+		strlcat(arcs_cmdline, prom_argv, COMMAND_LINE_SIZE);
+	}
+
+	configure_platform();
+	prom_meminit();
+
+#ifndef CONFIG_BOOTLOADER_DRIVER
+	pr_info("\nBootloader driver isn't loaded...\n");
+#endif
+}
-- 
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