I have ported PostgreSQL 6.4 to Cobalt Qube running Linux 2.0.33 with

MIPS cpu (I think it's R4000). I have tested the patches on LinuxPPC
and FreeBSD. I believe they do not harm other platforms.
--
Tatsuo Ishii

src/backend/storage/buffer/s_lock.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/storage/buffer/Attic/s_lock.c,v 1.13 1998/12/15 12:46:21 vadim Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/storage/buffer/Attic/s_lock.c,v 1.14 1998/12/18 17:25:39 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -124,7 +124,28 @@ success:			\n\
 
 #endif	 /* PPC */
 
-
+#if defined(__mips)
+static void
+tas_dummy()
+{
+	__asm__("		\n\
+.global	tas			\n\
+tas:				\n\
+	.frame	$sp, 0, $31	\n\
+	ll	$14, 0($4)	\n\
+	or	$15, $14, 1	\n\
+	sc	$15, 0($4)	\n\
+	beq	$15, 0, fail	\n\
+	bne	$14, 0, fail	\n\
+	li	$2, 0		\n\
+	.livereg 0x2000FF0E,0x00000FFF	\n\
+	j       $31		\n\
+fail:				\n\
+	li	$2, 1		\n\
+	j       $31		\n\
+	");
+}
+#endif	/* __mips */
 
 #else							/* defined(__GNUC__) */
 /***************************************************************************

src/include/port/linux.h

@@ -14,6 +14,9 @@ typedef unsigned int slock_t;
 #elif defined(__alpha)
 typedef long int slock_t;
 
+#elif defined(__mips)
+typedef unsigned int slock_t;
+
 #else							/* i386 probably */
 typedef unsigned char slock_t;
 

src/template/.similar

@@ -26,3 +26,4 @@ sparc-sun-solaris=solaris_sparc_gcc
 sparc-sun-sunos4=sunos4_gcc
 sparc-sun-sunos5=solaris_sparc_gcc
 sparc-unknown-linux-gnu=linux_sparc
+mips-pc-linux-gnu=linux_mips

src/template/linux_mips

@@ -0,0 +1,10 @@
+AROPT:crs
+CFLAGS:-O2 -mips2
+SHARED_LIB:-fpic
+ALL:
+SRCH_INC:
+SRCH_LIB:
+USE_LOCALE:no
+DLSUFFIX:.so
+YFLAGS:-d
+YACC:bison -y