diff options
Diffstat (limited to 'arch/xtensa/mm/mmu.c')
| -rw-r--r-- | arch/xtensa/mm/mmu.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/arch/xtensa/mm/mmu.c b/arch/xtensa/mm/mmu.c index 0f77f9d3bb8..a1077570e38 100644 --- a/arch/xtensa/mm/mmu.c +++ b/arch/xtensa/mm/mmu.c @@ -24,15 +24,19 @@ void __init paging_init(void) */ void __init init_mmu(void) { - /* Writing zeros to the <t>TLBCFG special registers ensure - * that valid values exist in the register. For existing - * PGSZID<w> fields, zero selects the first element of the - * page-size array. For nonexistent PGSZID<w> fields, zero is - * the best value to write. Also, when changing PGSZID<w> +#if !(XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY) + /* + * Writing zeros to the instruction and data TLBCFG special + * registers ensure that valid values exist in the register. + * + * For existing PGSZID<w> fields, zero selects the first element + * of the page-size array. For nonexistent PGSZID<w> fields, + * zero is the best value to write. Also, when changing PGSZID<w> * fields, the corresponding TLB must be flushed. */ set_itlbcfg_register(0); set_dtlbcfg_register(0); +#endif flush_tlb_all(); /* Set rasid register to a known value. */ |