diff options
| -rw-r--r-- | arch/nds32/kernel/head.S | 9 |
1 files changed, 1 insertions, 8 deletions
diff --git a/arch/nds32/kernel/head.S b/arch/nds32/kernel/head.S index 1ce653d35d936..2c8aac6201be4 100644 --- a/arch/nds32/kernel/head.S +++ b/arch/nds32/kernel/head.S @@ -123,14 +123,7 @@ _image_size_check: andi $r0, $r0, MMU_CFG_mskTBS srli $r6, $r6, MMU_CFG_offTBW srli $r0, $r0, MMU_CFG_offTBS - /* - * we just map the kernel to the maximum way - 1 of tlb - * reserver one way for UART VA mapping - * it will cause page fault if UART mapping cover the kernel mapping - * - * direct mapping is not supported now. - */ - beqz $r6, __error ! MMU_CFG.TBW = 0 is direct mappin + addi $r6, $r6, #0x1 ! MMU_CFG.TBW value -> meaning addi $r0, $r0, #0x2 ! MMU_CFG.TBS value -> meaning sll $r0, $r6, $r0 ! entries = k-way * n-set mul $r6, $r0, $r5 ! max size = entries * page size |