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authorSteven J. Hill <Steven.Hill@imgtec.com>2013-03-25 14:32:15 -0500
committerRalf Baechle <ralf@linux-mips.org>2013-05-08 12:30:09 +0200
commit14aecdd419217e041fb5dd2749d11f58503bdf62 (patch)
treeab7fbfadfcaa6d92b0465525aa55e22fb19e934f /arch/mips/include
parent98ffcf602bd55656a4f6c5d9c743bffef115a8c1 (diff)
downloadop-kernel-dev-14aecdd419217e041fb5dd2749d11f58503bdf62.zip
op-kernel-dev-14aecdd419217e041fb5dd2749d11f58503bdf62.tar.gz
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>
Diffstat (limited to 'arch/mips/include')
-rw-r--r--arch/mips/include/asm/fw/fw.h47
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 0000000..d6c50a7
--- /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_ */
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