diff --git a/arch/powerpc/kernel/head_44x.S b/arch/powerpc/kernel/head_44x.S index 26237357a88c..bd4fe9e7278b 100644 --- a/arch/powerpc/kernel/head_44x.S +++ b/arch/powerpc/kernel/head_44x.S @@ -68,6 +68,17 @@ _ENTRY(_start); mr r27,r7 li r24,0 /* CPU number */ +/* + * In case the firmware didn't do it, we apply some workarounds + * that are good for all 440 core variants here + */ + mfspr r3,SPRN_CCR0 + rlwinm r3,r3,0,0,27 /* disable icache prefetch */ + isync + mtspr SPRN_CCR0,r3 + isync + sync + /* * Set up the initial MMU state * @@ -570,7 +581,6 @@ finish_tlb_load: rlwimi r10,r12,29,30,30 /* DIRTY -> SW position */ and r11,r12,r10 /* Mask PTE bits to keep */ andi. r10,r12,_PAGE_USER /* User page ? */ - ori r11,r11,_PAGE_GUARDED /* 440 errata, needs G set */ beq 1f /* nope, leave U bits empty */ rlwimi r11,r11,3,26,28 /* yes, copy S bits to U */ 1: tlbwe r11,r13,PPC44x_TLB_ATTRIB /* Write ATTRIB */