diff options
Diffstat (limited to 'arch/score/mm/tlb-miss.S')
| -rw-r--r-- | arch/score/mm/tlb-miss.S | 199 |
1 files changed, 0 insertions, 199 deletions
diff --git a/arch/score/mm/tlb-miss.S b/arch/score/mm/tlb-miss.S deleted file mode 100644 index f27651914e8d..000000000000 --- a/arch/score/mm/tlb-miss.S +++ /dev/null @@ -1,199 +0,0 @@ -/* - * arch/score/mm/tlbex.S - * - * Score Processor version. - * - * Copyright (C) 2009 Sunplus Core Technology Co., Ltd. - * Lennox Wu <lennox.wu@sunplusct.com> - * Chen Liqin <liqin.chen@sunplusct.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <asm/asmmacro.h> -#include <asm/pgtable-bits.h> -#include <asm/scoreregs.h> - -/* -* After this macro runs, the pte faulted on is -* in register PTE, a ptr into the table in which -* the pte belongs is in PTR. -*/ - .macro load_pte, pte, ptr - la \ptr, pgd_current - lw \ptr, [\ptr, 0] - mfcr \pte, cr6 - srli \pte, \pte, 22 - slli \pte, \pte, 2 - add \ptr, \ptr, \pte - lw \ptr, [\ptr, 0] - mfcr \pte, cr6 - srli \pte, \pte, 10 - andi \pte, 0xffc - add \ptr, \ptr, \pte - lw \pte, [\ptr, 0] - .endm - - .macro pte_reload, ptr - lw \ptr, [\ptr, 0] - mtcr \ptr, cr12 - nop - nop - nop - nop - nop - .endm - - .macro do_fault, write - SAVE_ALL - mfcr r6, cr6 - mv r4, r0 - ldi r5, \write - la r8, do_page_fault - brl r8 - j ret_from_exception - .endm - - .macro pte_writable, pte, ptr, label - andi \pte, 0x280 - cmpi.c \pte, 0x280 - bne \label - lw \pte, [\ptr, 0] /*reload PTE*/ - .endm - -/* - * Make PTE writable, update software status bits as well, - * then store at PTR. - */ - .macro pte_makewrite, pte, ptr - ori \pte, 0x426 - sw \pte, [\ptr, 0] - .endm - - .text -ENTRY(score7_FTLB_refill_Handler) - la r31, pgd_current /* get pgd pointer */ - lw r31, [r31, 0] /* get the address of PGD */ - mfcr r30, cr6 - srli r30, r30, 22 /* PGDIR_SHIFT = 22*/ - slli r30, r30, 2 - add r31, r31, r30 - lw r31, [r31, 0] /* get the address of the start address of PTE table */ - - mfcr r30, cr9 - andi r30, 0xfff /* equivalent to get PET index and right shift 2 bits */ - add r31, r31, r30 - lw r30, [r31, 0] /* load pte entry */ - mtcr r30, cr12 - nop - nop - nop - nop - nop - mtrtlb - nop - nop - nop - nop - nop - rte /* 6 cycles to make sure tlb entry works */ - -ENTRY(score7_KSEG_refill_Handler) - la r31, pgd_current /* get pgd pointer */ - lw r31, [r31, 0] /* get the address of PGD */ - mfcr r30, cr6 - srli r30, r30, 22 /* PGDIR_SHIFT = 22 */ - slli r30, r30, 2 - add r31, r31, r30 - lw r31, [r31, 0] /* get the address of the start address of PTE table */ - - mfcr r30, cr6 /* get Bad VPN */ - srli r30, r30, 10 - andi r30, 0xffc /* PTE VPN mask (bit 11~2) */ - - add r31, r31, r30 - lw r30, [r31, 0] /* load pte entry */ - mtcr r30, cr12 - nop - nop - nop - nop - nop - mtrtlb - nop - nop - nop - nop - nop - rte /* 6 cycles to make sure tlb entry works */ - -nopage_tlbl: - do_fault 0 /* Read */ - -ENTRY(handle_tlb_refill) - load_pte r30, r31 - pte_writable r30, r31, handle_tlb_refill_nopage - pte_makewrite r30, r31 /* Access|Modify|Dirty|Valid */ - pte_reload r31 - mtrtlb - nop - nop - nop - nop - nop - rte -handle_tlb_refill_nopage: - do_fault 0 /* Read */ - -ENTRY(handle_tlb_invaild) - load_pte r30, r31 - stlb /* find faulting entry */ - pte_writable r30, r31, handle_tlb_invaild_nopage - pte_makewrite r30, r31 /* Access|Modify|Dirty|Valid */ - pte_reload r31 - mtptlb - nop - nop - nop - nop - nop - rte -handle_tlb_invaild_nopage: - do_fault 0 /* Read */ - -ENTRY(handle_mod) - load_pte r30, r31 - stlb /* find faulting entry */ - andi r30, _PAGE_WRITE /* Writable? */ - cmpz.c r30 - beq nowrite_mod - lw r30, [r31, 0] /* reload into r30 */ - - /* Present and writable bits set, set accessed and dirty bits. */ - pte_makewrite r30, r31 - - /* Now reload the entry into the tlb. */ - pte_reload r31 - mtptlb - nop - nop - nop - nop - nop - rte - -nowrite_mod: - do_fault 1 /* Write */ |