MIPS: FW: Add environment variable processing.

Add parsing of the environment and command line variables passed to
the kernel to the firmware library.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/arch/mips/include/asm/fw/fw.h b/arch/mips/include/asm/fw/fw.h
new file mode 100644
index 00000000000..d6c50a7e9ed
--- /dev/null
+++ b/arch/mips/include/asm/fw/fw.h
@@ -0,0 +1,47 @@
+/*
+ * 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) 2012 MIPS Technologies, Inc.
+ */
+#ifndef __ASM_FW_H_
+#define __ASM_FW_H_
+
+#include <asm/bootinfo.h>	/* For cleaner code... */
+
+enum fw_memtypes {
+	fw_dontuse,
+	fw_code,
+	fw_free,
+};
+
+typedef struct {
+	unsigned long base;	/* Within KSEG0 */
+	unsigned int size;	/* bytes */
+	enum fw_memtypes type;	/* fw_memtypes */
+} fw_memblock_t;
+
+/* Maximum number of memory block descriptors. */
+#define FW_MAX_MEMBLOCKS	32
+
+extern int fw_argc;
+extern int *_fw_argv;
+extern int *_fw_envp;
+
+/*
+ * Most firmware like YAMON, PMON, etc. pass arguments and environment
+ * variables as 32-bit pointers. These take care of sign extension.
+ */
+#define fw_argv(index)		((char *)(long)_fw_argv[(index)])
+#define fw_envp(index)		((char *)(long)_fw_envp[(index)])
+
+extern void fw_init_cmdline(void);
+extern char *fw_getcmdline(void);
+extern fw_memblock_t *fw_getmdesc(void);
+extern void fw_meminit(void);
+extern char *fw_getenv(char *name);
+extern unsigned long fw_getenvl(char *name);
+extern void fw_init_early_console(char port);
+
+#endif /* __ASM_FW_H_ */