diff --git a/arch/mips/au1000/common/prom.c b/arch/mips/au1000/common/prom.c
index 5d6ddf1..90d7069 100644
--- a/arch/mips/au1000/common/prom.c
+++ b/arch/mips/au1000/common/prom.c
@@ -33,7 +33,6 @@
  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  *  675 Mass Ave, Cambridge, MA 02139, USA.
  */
-
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
@@ -41,18 +40,16 @@
 
 #include <asm/bootinfo.h>
 
-/* #define DEBUG_CMDLINE */
-
-extern int prom_argc;
-extern char **prom_argv, **prom_envp;
-
+int prom_argc;
+char **prom_argv;
+char **prom_envp;
 
 char * __init_or_module prom_getcmdline(void)
 {
 	return &(arcs_cmdline[0]);
 }
 
-void  prom_init_cmdline(void)
+void prom_init_cmdline(void)
 {
 	char *cp;
 	int actr;
@@ -61,7 +58,7 @@
 
 	cp = &(arcs_cmdline[0]);
 	while(actr < prom_argc) {
-	        strcpy(cp, prom_argv[actr]);
+		strcpy(cp, prom_argv[actr]);
 		cp += strlen(prom_argv[actr]);
 		*cp++ = ' ';
 		actr++;
@@ -70,10 +67,8 @@
 		--cp;
 	if (prom_argc > 1)
 		*cp = '\0';
-
 }
 
-
 char *prom_getenv(char *envname)
 {
 	/*
@@ -95,17 +90,19 @@
 		}
 		env++;
 	}
+
 	return NULL;
 }
 
 static inline unsigned char str2hexnum(unsigned char c)
 {
-	if(c >= '0' && c <= '9')
+	if (c >= '0' && c <= '9')
 		return c - '0';
-	if(c >= 'a' && c <= 'f')
+	if (c >= 'a' && c <= 'f')
 		return c - 'a' + 10;
-	if(c >= 'A' && c <= 'F')
+	if (c >= 'A' && c <= 'F')
 		return c - 'A' + 10;
+
 	return 0; /* foo */
 }
 
diff --git a/arch/mips/au1000/common/setup.c b/arch/mips/au1000/common/setup.c
index b212c07..a90d425 100644
--- a/arch/mips/au1000/common/setup.c
+++ b/arch/mips/au1000/common/setup.c
@@ -40,10 +40,11 @@
 #include <asm/mipsregs.h>
 #include <asm/reboot.h>
 #include <asm/pgtable.h>
-#include <asm/mach-au1x00/au1000.h>
 #include <asm/time.h>
 
-extern char * prom_getcmdline(void);
+#include <au1000.h>
+#include <prom.h>
+
 extern void __init board_setup(void);
 extern void au1000_restart(char *);
 extern void au1000_halt(void);
diff --git a/arch/mips/au1000/db1x00/init.c b/arch/mips/au1000/db1x00/init.c
index 4d7bcfc..43298fd 100644
--- a/arch/mips/au1000/db1x00/init.c
+++ b/arch/mips/au1000/db1x00/init.c
@@ -31,15 +31,13 @@
 #include <linux/mm.h>
 #include <linux/sched.h>
 #include <linux/bootmem.h>
-#include <asm/addrspace.h>
-#include <asm/bootinfo.h>
 #include <linux/string.h>
 #include <linux/kernel.h>
 
-int prom_argc;
-char **prom_argv, **prom_envp;
-extern void  __init prom_init_cmdline(void);
-extern char *prom_getenv(char *envname);
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+
+#include <prom.h>
 
 const char *get_system_type(void)
 {
diff --git a/arch/mips/au1000/mtx-1/init.c b/arch/mips/au1000/mtx-1/init.c
index 2aa7b2e..cdeae32 100644
--- a/arch/mips/au1000/mtx-1/init.c
+++ b/arch/mips/au1000/mtx-1/init.c
@@ -34,13 +34,11 @@
 #include <linux/init.h>
 #include <linux/mm.h>
 #include <linux/bootmem.h>
+
 #include <asm/addrspace.h>
 #include <asm/bootinfo.h>
 
-int prom_argc;
-char **prom_argv, **prom_envp;
-extern void  __init prom_init_cmdline(void);
-extern char *prom_getenv(char *envname);
+#include <prom.h>
 
 const char *get_system_type(void)
 {
diff --git a/arch/mips/au1000/pb1000/init.c b/arch/mips/au1000/pb1000/init.c
index 4535f72..ddccaf6 100644
--- a/arch/mips/au1000/pb1000/init.c
+++ b/arch/mips/au1000/pb1000/init.c
@@ -30,15 +30,13 @@
 #include <linux/mm.h>
 #include <linux/sched.h>
 #include <linux/bootmem.h>
-#include <asm/addrspace.h>
-#include <asm/bootinfo.h>
 #include <linux/string.h>
 #include <linux/kernel.h>
 
-int prom_argc;
-char **prom_argv, **prom_envp;
-extern void  __init prom_init_cmdline(void);
-extern char *prom_getenv(char *envname);
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+
+#include <prom.h>
 
 const char *get_system_type(void)
 {
diff --git a/arch/mips/au1000/pb1100/init.c b/arch/mips/au1000/pb1100/init.c
index 7ba6852..c93fd39 100644
--- a/arch/mips/au1000/pb1100/init.c
+++ b/arch/mips/au1000/pb1100/init.c
@@ -31,15 +31,13 @@
 #include <linux/mm.h>
 #include <linux/sched.h>
 #include <linux/bootmem.h>
-#include <asm/addrspace.h>
-#include <asm/bootinfo.h>
 #include <linux/string.h>
 #include <linux/kernel.h>
 
-int prom_argc;
-char **prom_argv, **prom_envp;
-extern void  __init prom_init_cmdline(void);
-extern char *prom_getenv(char *envname);
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+
+#include <prom.h>
 
 const char *get_system_type(void)
 {
diff --git a/arch/mips/au1000/pb1200/board_setup.c b/arch/mips/au1000/pb1200/board_setup.c
index 2122515..5dbc986 100644
--- a/arch/mips/au1000/pb1200/board_setup.c
+++ b/arch/mips/au1000/pb1200/board_setup.c
@@ -41,8 +41,10 @@
 #include <asm/mipsregs.h>
 #include <asm/reboot.h>
 #include <asm/pgtable.h>
-#include <asm/mach-au1x00/au1000.h>
-#include <asm/mach-au1x00/au1xxx_dbdma.h>
+
+#include <au1000.h>
+#include <au1xxx_dbdma.h>
+#include <prom.h>
 
 #ifdef CONFIG_MIPS_PB1200
 #include <asm/mach-pb1x00/pb1200.h>
diff --git a/arch/mips/au1000/pb1200/init.c b/arch/mips/au1000/pb1200/init.c
index 5a70029..c251570 100644
--- a/arch/mips/au1000/pb1200/init.c
+++ b/arch/mips/au1000/pb1200/init.c
@@ -31,15 +31,13 @@
 #include <linux/mm.h>
 #include <linux/sched.h>
 #include <linux/bootmem.h>
-#include <asm/addrspace.h>
-#include <asm/bootinfo.h>
 #include <linux/string.h>
 #include <linux/kernel.h>
 
-int prom_argc;
-char **prom_argv, **prom_envp;
-extern void  __init prom_init_cmdline(void);
-extern char *prom_getenv(char *envname);
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+
+#include <prom.h>
 
 const char *get_system_type(void)
 {
diff --git a/arch/mips/au1000/pb1500/init.c b/arch/mips/au1000/pb1500/init.c
index e58a9d6..507d4b2 100644
--- a/arch/mips/au1000/pb1500/init.c
+++ b/arch/mips/au1000/pb1500/init.c
@@ -31,15 +31,13 @@
 #include <linux/mm.h>
 #include <linux/sched.h>
 #include <linux/bootmem.h>
-#include <asm/addrspace.h>
-#include <asm/bootinfo.h>
 #include <linux/string.h>
 #include <linux/kernel.h>
 
-int prom_argc;
-char **prom_argv, **prom_envp;
-extern void  __init prom_init_cmdline(void);
-extern char *prom_getenv(char *envname);
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+
+#include <prom.h>
 
 const char *get_system_type(void)
 {
diff --git a/arch/mips/au1000/pb1550/init.c b/arch/mips/au1000/pb1550/init.c
index fad53bf..b03eee6 100644
--- a/arch/mips/au1000/pb1550/init.c
+++ b/arch/mips/au1000/pb1550/init.c
@@ -31,15 +31,13 @@
 #include <linux/mm.h>
 #include <linux/sched.h>
 #include <linux/bootmem.h>
-#include <asm/addrspace.h>
-#include <asm/bootinfo.h>
 #include <linux/string.h>
 #include <linux/kernel.h>
 
-int prom_argc;
-char **prom_argv, **prom_envp;
-extern void  __init prom_init_cmdline(void);
-extern char *prom_getenv(char *envname);
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+
+#include <prom.h>
 
 const char *get_system_type(void)
 {
diff --git a/arch/mips/au1000/xxs1500/init.c b/arch/mips/au1000/xxs1500/init.c
index 9f839c3..6532939 100644
--- a/arch/mips/au1000/xxs1500/init.c
+++ b/arch/mips/au1000/xxs1500/init.c
@@ -30,15 +30,13 @@
 #include <linux/mm.h>
 #include <linux/sched.h>
 #include <linux/bootmem.h>
-#include <asm/addrspace.h>
-#include <asm/bootinfo.h>
 #include <linux/string.h>
 #include <linux/kernel.h>
 
-int prom_argc;
-char **prom_argv, **prom_envp;
-extern void  __init prom_init_cmdline(void);
-extern char *prom_getenv(char *envname);
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+
+#include <prom.h>
 
 const char *get_system_type(void)
 {
diff --git a/drivers/net/au1000_eth.c b/drivers/net/au1000_eth.c
index 297e2d0..185f98e 100644
--- a/drivers/net/au1000_eth.c
+++ b/drivers/net/au1000_eth.c
@@ -54,13 +54,16 @@
 #include <linux/delay.h>
 #include <linux/crc32.h>
 #include <linux/phy.h>
+
+#include <asm/cpu.h>
 #include <asm/mipsregs.h>
 #include <asm/irq.h>
 #include <asm/io.h>
 #include <asm/processor.h>
 
-#include <asm/mach-au1x00/au1000.h>
-#include <asm/cpu.h>
+#include <au1000.h>
+#include <prom.h>
+
 #include "au1000_eth.h"
 
 #ifdef AU1000_ETH_DEBUG
@@ -96,9 +99,6 @@
 static void au1000_adjust_link(struct net_device *);
 static void enable_mac(struct net_device *, int);
 
-// externs
-extern int prom_get_ethernet_addr(char *ethernet_addr);
-
 /*
  * Theory of operation
  *
diff --git a/include/asm-mips/mach-au1x00/prom.h b/include/asm-mips/mach-au1x00/prom.h
new file mode 100644
index 0000000..e387155
--- /dev/null
+++ b/include/asm-mips/mach-au1x00/prom.h
@@ -0,0 +1,13 @@
+#ifndef __AU1X00_PROM_H
+#define __AU1X00_PROM_H
+
+extern int prom_argc;
+extern char **prom_argv;
+extern char **prom_envp;
+
+extern void prom_init_cmdline(void);
+extern char *prom_getcmdline(void);
+extern char *prom_getenv(char *envname);
+extern int prom_get_ethernet_addr(char *ethernet_addr);
+
+#endif