diff options
Diffstat (limited to 'arch/m32r/mm/mmu.S')
| -rw-r--r-- | arch/m32r/mm/mmu.S | 355 |
1 files changed, 0 insertions, 355 deletions
diff --git a/arch/m32r/mm/mmu.S b/arch/m32r/mm/mmu.S deleted file mode 100644 index fd8f9c9b7b07..000000000000 --- a/arch/m32r/mm/mmu.S +++ /dev/null @@ -1,355 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * linux/arch/m32r/mm/mmu.S - * - * Copyright (C) 2001 by Hiroyuki Kondo - */ - -#include <linux/linkage.h> -#include <asm/assembler.h> -#include <asm/smp.h> - - .text -#ifdef CONFIG_MMU - -#include <asm/mmu_context.h> -#include <asm/page.h> -#include <asm/pgtable.h> -#include <asm/m32r.h> - -/* - * TLB Miss Exception handler - */ - .balign 16 -ENTRY(tme_handler) - .global tlb_entry_i_dat - .global tlb_entry_d_dat - - SWITCH_TO_KERNEL_STACK - -#if defined(CONFIG_ISA_M32R2) - st r0, @-sp - st r1, @-sp - st r2, @-sp - st r3, @-sp - - seth r3, #high(MMU_REG_BASE) - ld r1, @(MESTS_offset, r3) ; r1: status (MESTS reg.) - ld r0, @(MDEVP_offset, r3) ; r0: PFN + ASID (MDEVP reg.) - st r1, @(MESTS_offset, r3) ; clear status (MESTS reg.) - and3 r1, r1, #(MESTS_IT) - bnez r1, 1f ; instruction TLB miss? - -;; data TLB miss -;; input -;; r0: PFN + ASID (MDEVP reg.) -;; r1 - r3: free -;; output -;; r0: PFN + ASID -;; r1: TLB entry base address -;; r2: &tlb_entry_{i|d}_dat -;; r3: free - -#ifndef CONFIG_SMP - seth r2, #high(tlb_entry_d_dat) - or3 r2, r2, #low(tlb_entry_d_dat) -#else /* CONFIG_SMP */ - ldi r1, #-8192 - seth r2, #high(tlb_entry_d_dat) - or3 r2, r2, #low(tlb_entry_d_dat) - and r1, sp - ld r1, @(16, r1) ; current_thread_info->cpu - slli r1, #2 - add r2, r1 -#endif /* !CONFIG_SMP */ - seth r1, #high(DTLB_BASE) - or3 r1, r1, #low(DTLB_BASE) - bra 2f - - .balign 16 - .fillinsn -1: -;; instrucntion TLB miss -;; input -;; r0: MDEVP reg. (included ASID) -;; r1 - r3: free -;; output -;; r0: PFN + ASID -;; r1: TLB entry base address -;; r2: &tlb_entry_{i|d}_dat -;; r3: free - ldi r3, #-4096 - and3 r0, r0, #(MMU_CONTEXT_ASID_MASK) - mvfc r1, bpc - and r1, r3 - or r0, r1 ; r0: PFN + ASID -#ifndef CONFIG_SMP - seth r2, #high(tlb_entry_i_dat) - or3 r2, r2, #low(tlb_entry_i_dat) -#else /* CONFIG_SMP */ - ldi r1, #-8192 - seth r2, #high(tlb_entry_i_dat) - or3 r2, r2, #low(tlb_entry_i_dat) - and r1, sp - ld r1, @(16, r1) ; current_thread_info->cpu - slli r1, #2 - add r2, r1 -#endif /* !CONFIG_SMP */ - seth r1, #high(ITLB_BASE) - or3 r1, r1, #low(ITLB_BASE) - - .fillinsn -2: -;; select TLB entry -;; input -;; r0: PFN + ASID -;; r1: TLB entry base address -;; r2: &tlb_entry_{i|d}_dat -;; r3: free -;; output -;; r0: PFN + ASID -;; r1: TLB entry address -;; r2, r3: free -#ifdef CONFIG_ISA_DUAL_ISSUE - ld r3, @r2 || srli r1, #3 -#else - ld r3, @r2 - srli r1, #3 -#endif - add r1, r3 - ; tlb_entry_{d|i}_dat++; - addi r3, #1 - and3 r3, r3, #(NR_TLB_ENTRIES - 1) -#ifdef CONFIG_ISA_DUAL_ISSUE - st r3, @r2 || slli r1, #3 -#else - st r3, @r2 - slli r1, #3 -#endif - -;; load pte -;; input -;; r0: PFN + ASID -;; r1: TLB entry address -;; r2, r3: free -;; output -;; r0: PFN + ASID -;; r1: TLB entry address -;; r2: pte_data -;; r3: free - ; pgd = *(unsigned long *)MPTB; - ld24 r2, #(-MPTB - 1) - srl3 r3, r0, #22 -#ifdef CONFIG_ISA_DUAL_ISSUE - not r2, r2 || slli r3, #2 ; r3: pgd offset -#else - not r2, r2 - slli r3, #2 -#endif - ld r2, @r2 ; r2: pgd base addr (MPTB reg.) - or r3, r2 ; r3: pmd addr - - ; pmd = pmd_offset(pgd, address); - ld r3, @r3 ; r3: pmd data - beqz r3, 3f ; pmd_none(*pmd) ? - - and3 r2, r3, #0xfff - add3 r2, r2, #-355 ; _KERNPG_TABLE(=0x163) - bnez r2, 3f ; pmd_bad(*pmd) ? - ldi r2, #-4096 - - ; pte = pte_offset(pmd, address); - and r2, r3 ; r2: pte base addr - srl3 r3, r0, #10 - and3 r3, r3, #0xffc ; r3: pte offset - or r3, r2 - seth r2, #0x8000 - or r3, r2 ; r3: pte addr - - ; pte_data = (unsigned long)pte_val(*pte); - ld r2, @r3 ; r2: pte data - and3 r3, r2, #2 ; _PAGE_PRESENT(=2) check - beqz r3, 3f - - .fillinsn -5: -;; set tlb -;; input -;; r0: PFN + ASID -;; r1: TLB entry address -;; r2: pte_data -;; r3: free - st r0, @r1 ; set_tlb_tag(entry++, address); - st r2, @+r1 ; set_tlb_data(entry, pte_data); - - .fillinsn -6: - ld r3, @sp+ - ld r2, @sp+ - ld r1, @sp+ - ld r0, @sp+ - rte - - .fillinsn -3: -;; error -;; input -;; r0: PFN + ASID -;; r1: TLB entry address -;; r2, r3: free -;; output -;; r0: PFN + ASID -;; r1: TLB entry address -;; r2: pte_data -;; r3: free -#ifdef CONFIG_ISA_DUAL_ISSUE - bra 5b || ldi r2, #2 -#else - ldi r2, #2 ; r2: pte_data = 0 | _PAGE_PRESENT(=2) - bra 5b -#endif - -#elif defined (CONFIG_ISA_M32R) - - st sp, @-sp - st r0, @-sp - st r1, @-sp - st r2, @-sp - st r3, @-sp - st r4, @-sp - - seth r3, #high(MMU_REG_BASE) - ld r0, @(MDEVA_offset,r3) ; r0: address (MDEVA reg.) - mvfc r2, bpc ; r2: bpc - ld r1, @(MESTS_offset,r3) ; r1: status (MESTS reg.) - st r1, @(MESTS_offset,r3) ; clear status (MESTS reg.) - and3 r1, r1, #(MESTS_IT) - beqz r1, 1f ; data TLB miss? - -;; instrucntion TLB miss - mv r0, r2 ; address = bpc; - ; entry = (unsigned long *)ITLB_BASE+tlb_entry_i*2; - seth r3, #shigh(tlb_entry_i_dat) - ld r4, @(low(tlb_entry_i_dat),r3) - sll3 r2, r4, #3 - seth r1, #high(ITLB_BASE) - or3 r1, r1, #low(ITLB_BASE) - add r2, r1 ; r2: entry - addi r4, #1 ; tlb_entry_i++; - and3 r4, r4, #(NR_TLB_ENTRIES-1) - st r4, @(low(tlb_entry_i_dat),r3) - bra 2f - .fillinsn -1: -;; data TLB miss - ; entry = (unsigned long *)DTLB_BASE+tlb_entry_d*2; - seth r3, #shigh(tlb_entry_d_dat) - ld r4, @(low(tlb_entry_d_dat),r3) - sll3 r2, r4, #3 - seth r1, #high(DTLB_BASE) - or3 r1, r1, #low(DTLB_BASE) - add r2, r1 ; r2: entry - addi r4, #1 ; tlb_entry_d++; - and3 r4, r4, #(NR_TLB_ENTRIES-1) - st r4, @(low(tlb_entry_d_dat),r3) - .fillinsn -2: -;; load pte -; r0: address, r2: entry -; r1,r3,r4: (free) - ; pgd = *(unsigned long *)MPTB; - ld24 r1, #(-MPTB-1) - not r1, r1 - ld r1, @r1 - srl3 r4, r0, #22 - sll3 r3, r4, #2 - add r3, r1 ; r3: pgd - ; pmd = pmd_offset(pgd, address); - ld r1, @r3 ; r1: pmd - beqz r1, 3f ; pmd_none(*pmd) ? -; - and3 r1, r1, #0x3ff - ldi r4, #0x163 ; _KERNPG_TABLE(=0x163) - bne r1, r4, 3f ; pmd_bad(*pmd) ? - - .fillinsn -4: - ; pte = pte_offset(pmd, address); - ld r4, @r3 ; r4: pte - ldi r3, #-4096 - and r4, r3 - srl3 r3, r0, #10 - and3 r3, r3, #0xffc - add r4, r3 - seth r3, #0x8000 - add r4, r3 ; r4: pte - ; pte_data = (unsigned long)pte_val(*pte); - ld r1, @r4 ; r1: pte_data - and3 r3, r1, #2 ; _PAGE_PRESENT(=2) check - beqz r3, 3f - - .fillinsn -;; set tlb -; r0: address, r1: pte_data, r2: entry -; r3,r4: (free) -5: - ldi r3, #-4096 ; set_tlb_tag(entry++, address); - and r3, r0 - seth r4, #shigh(MASID) - ld r4, @(low(MASID),r4) ; r4: MASID - and3 r4, r4, #(MMU_CONTEXT_ASID_MASK) - or r3, r4 - st r3, @r2 - st r1, @(4,r2) ; set_tlb_data(entry, pte_data); - - ld r4, @sp+ - ld r3, @sp+ - ld r2, @sp+ - ld r1, @sp+ - ld r0, @sp+ - ld sp, @sp+ - rte - - .fillinsn -3: - ldi r1, #2 ; r1: pte_data = 0 | _PAGE_PRESENT(=2) - bra 5b - -#else -#error unknown isa configuration -#endif - -ENTRY(init_tlb) -;; Set MMU Register - seth r0, #high(MMU_REG_BASE) ; Set MMU_REG_BASE higher - or3 r0, r0, #low(MMU_REG_BASE) ; Set MMU_REG_BASE lower - ldi r1, #0 - st r1, @(MPSZ_offset,r0) ; Set MPSZ Reg(Page size 4KB:0 16KB:1 64KB:2) - ldi r1, #0 - st r1, @(MASID_offset,r0) ; Set ASID Zero - -;; Set TLB - seth r0, #high(ITLB_BASE) ; Set ITLB_BASE higher - or3 r0, r0, #low(ITLB_BASE) ; Set ITLB_BASE lower - seth r1, #high(DTLB_BASE) ; Set DTLB_BASE higher - or3 r1, r1, #low(DTLB_BASE) ; Set DTLB_BASE lower - ldi r2, #0 - ldi r3, #NR_TLB_ENTRIES - addi r0, #-4 - addi r1, #-4 -clear_tlb: - st r2, @+r0 ; VPA <- 0 - st r2, @+r0 ; PPA <- 0 - st r2, @+r1 ; VPA <- 0 - st r2, @+r1 ; PPA <- 0 - addi r3, #-1 - bnez r3, clear_tlb -;; - jmp r14 - -ENTRY(m32r_itlb_entrys) -ENTRY(m32r_otlb_entrys) - -#endif /* CONFIG_MMU */ - - .end |