e6500: Move L1 enablement after L2 enablement

The L1 D-cache on e6500 is write-through. This means that it's not
considered a good idea to have the L1 up and running if the L2 is
disabled. We don't actually *use* the L1 until after the L2 is
brought up on e6500, so go ahead and move the L1 enablement after
that code is done.

Signed-off-by: Andy Fleming <afleming@freescale.com>

diff --git a/arch/powerpc/cpu/mpc85xx/start.S b/arch/powerpc/cpu/mpc85xx/start.S
index 2ce5505..5542d0a 100644 (file)
--- a/arch/powerpc/cpu/mpc85xx/start.S
+++ b/arch/powerpc/cpu/mpc85xx/start.S
@@ -173,52 +173,6 @@ l2_disabled:
        mfspr   r1,DBSR
        mtspr   DBSR,r1         /* Clear all valid bits */
 
-       /*
-        *      Enable L1 Caches early
-        *
-        */
-
-#ifdef CONFIG_SYS_CACHE_STASHING
-       /* set stash id to (coreID) * 2 + 32 + L1 CT (0) */
-       li      r2,(32 + 0)
-       mtspr   L1CSR2,r2
-#endif
-
-       /* Enable/invalidate the I-Cache */
-       lis     r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@h
-       ori     r2,r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@l
-       mtspr   SPRN_L1CSR1,r2
-1:
-       mfspr   r3,SPRN_L1CSR1
-       and.    r1,r3,r2
-       bne     1b
-
-       lis     r3,(L1CSR1_CPE|L1CSR1_ICE)@h
-       ori     r3,r3,(L1CSR1_CPE|L1CSR1_ICE)@l
-       mtspr   SPRN_L1CSR1,r3
-       isync
-2:
-       mfspr   r3,SPRN_L1CSR1
-       andi.   r1,r3,L1CSR1_ICE@l
-       beq     2b
-
-       /* Enable/invalidate the D-Cache */
-       lis     r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@h
-       ori     r2,r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@l
-       mtspr   SPRN_L1CSR0,r2
-1:
-       mfspr   r3,SPRN_L1CSR0
-       and.    r1,r3,r2
-       bne     1b
-
-       lis     r3,(L1CSR0_CPE|L1CSR0_DCE)@h
-       ori     r3,r3,(L1CSR0_CPE|L1CSR0_DCE)@l
-       mtspr   SPRN_L1CSR0,r3
-       isync
-2:
-       mfspr   r3,SPRN_L1CSR0
-       andi.   r1,r3,L1CSR0_DCE@l
-       beq     2b
 
        .macro  create_tlb1_entry esel ts tsize epn wimg rpn perm phy_high scratch
        lis     \scratch, FSL_BOOKE_MAS0(1, \esel, 0)@h
@@ -782,11 +736,57 @@ enable_l2_cluster_l2:
        bne     1b
        lis     r4, L2CSR0_L2E@h
        sync
-       stw     r4, 0(r3)       /* eanble L2 */
+       stw     r4, 0(r3)       /* enable L2 */
 delete_ccsr_l2_tlb:
        delete_tlb0_entry 0, CONFIG_SYS_CCSRBAR + 0xC20000, MAS2_I|MAS2_G, r3
 #endif
 
+       /*
+        * Enable the L1. On e6500, this has to be done
+        * after the L2 is up.
+        */
+
+#ifdef CONFIG_SYS_CACHE_STASHING
+       /* set stash id to (coreID) * 2 + 32 + L1 CT (0) */
+       li      r2,(32 + 0)
+       mtspr   L1CSR2,r2
+#endif
+
+       /* Enable/invalidate the I-Cache */
+       lis     r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@h
+       ori     r2,r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@l
+       mtspr   SPRN_L1CSR1,r2
+1:
+       mfspr   r3,SPRN_L1CSR1
+       and.    r1,r3,r2
+       bne     1b
+
+       lis     r3,(L1CSR1_CPE|L1CSR1_ICE)@h
+       ori     r3,r3,(L1CSR1_CPE|L1CSR1_ICE)@l
+       mtspr   SPRN_L1CSR1,r3
+       isync
+2:
+       mfspr   r3,SPRN_L1CSR1
+       andi.   r1,r3,L1CSR1_ICE@l
+       beq     2b
+
+       /* Enable/invalidate the D-Cache */
+       lis     r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@h
+       ori     r2,r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@l
+       mtspr   SPRN_L1CSR0,r2
+1:
+       mfspr   r3,SPRN_L1CSR0
+       and.    r1,r3,r2
+       bne     1b
+
+       lis     r3,(L1CSR0_CPE|L1CSR0_DCE)@h
+       ori     r3,r3,(L1CSR0_CPE|L1CSR0_DCE)@l
+       mtspr   SPRN_L1CSR0,r3
+       isync
+2:
+       mfspr   r3,SPRN_L1CSR0
+       andi.   r1,r3,L1CSR0_DCE@l
+       beq     2b
 #ifdef CONFIG_SYS_FSL_ERRATUM_A004510
 #define DCSR_LAWBARH0  (CONFIG_SYS_CCSRBAR + 0x1000)
 #define LAW_SIZE_1M    0x13