4 files changed, 28 insertions, 21 deletions

diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index 643c8bcffff3..c41ea2284954 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -1226,6 +1226,28 @@ void au1x00_fixup_config_od(void)
         }
 }
 
+/* CP0 hazard avoidance. */
+#define NXP_BARRIER()                                                   \
+         __asm__ __volatile__(                                          \
+        ".set noreorder\n\t"                                            \
+        "nop; nop; nop; nop; nop; nop;\n\t"                             \
+        ".set reorder\n\t")
+
+static void nxp_pr4450_fixup_config(void)
+{
+        unsigned long config0;
+
+        config0 = read_c0_config();
+
+        /* clear all three cache coherency fields */
+        config0 &= ~(0x7 | (7 << 25) | (7 << 28));
+        config0 |= (((_page_cachable_default >> _CACHE_SHIFT) <<  0) |
+                    ((_page_cachable_default >> _CACHE_SHIFT) << 25) |
+                    ((_page_cachable_default >> _CACHE_SHIFT) << 28));
+        write_c0_config(config0);
+        NXP_BARRIER();
+}
+
 static int __cpuinitdata cca = -1;
 
 static int __init cca_setup(char *str)
@@ -1271,6 +1293,10 @@ static void __cpuinit coherency_setup(void)
         case CPU_AU1500: /* rev. AB */
                 au1x00_fixup_config_od();
                 break;
+
+        case PRID_IMP_PR4450:
+                nxp_pr4450_fixup_config();
+                break;
         }
 }
 
diff --git a/arch/mips/nxp/pnx8550/jbs/board_setup.c b/arch/mips/nxp/pnx8550/jbs/board_setup.c
index f92826e0096d..57dd903ca408 100644
--- a/arch/mips/nxp/pnx8550/jbs/board_setup.c
+++ b/arch/mips/nxp/pnx8550/jbs/board_setup.c
@@ -47,16 +47,7 @@
 
 void __init board_setup(void)
 {
-        unsigned long config0, configpr;
-
-        config0 = read_c0_config();
-
-        /* clear all three cache coherency fields */
-        config0 &= ~(0x7 | (7<<25) | (7<<28));
-        config0 |= (CONF_CM_DEFAULT | (CONF_CM_DEFAULT<<25) |
-                        (CONF_CM_DEFAULT<<28));
-        write_c0_config(config0);
-        BARRIER;
+        unsigned long configpr;
 
         configpr = read_c0_config7();
         configpr |= (1<<19); /* enable tlb */
diff --git a/arch/mips/nxp/pnx8550/stb810/board_setup.c b/arch/mips/nxp/pnx8550/stb810/board_setup.c
index 1282c27cfcb7..af2a55e0b4e9 100644
--- a/arch/mips/nxp/pnx8550/stb810/board_setup.c
+++ b/arch/mips/nxp/pnx8550/stb810/board_setup.c
@@ -33,15 +33,7 @@
 
 void __init board_setup(void)
 {
-        unsigned long config0, configpr;
-
-        config0 = read_c0_config();
-
-        /* clear all three cache coherency fields */
-        config0 &= ~(0x7 | (7<<25) | (7<<28));
-        config0 |= (CONF_CM_DEFAULT | (CONF_CM_DEFAULT<<25) |
-                        (CONF_CM_DEFAULT<<28));
-        write_c0_config(config0);
+        unsigned long configpr;
 
         configpr = read_c0_config7();
         configpr |= (1<<19); /* enable tlb */
diff --git a/include/asm-mips/pgtable-bits.h b/include/asm-mips/pgtable-bits.h
index 60e2f9338fcd..51b34a48c84a 100644
--- a/include/asm-mips/pgtable-bits.h
+++ b/include/asm-mips/pgtable-bits.h
@@ -134,6 +134,4 @@
 
 #define _PAGE_CHG_MASK  (PAGE_MASK | _PAGE_ACCESSED | _PAGE_MODIFIED | _CACHE_MASK)
 
-#define CONF_CM_DEFAULT         (PAGE_CACHABLE_DEFAULT>>_CACHE_SHIFT)
-
 #endif /* _ASM_PGTABLE_BITS_H */