From 36bb94ba36f332de767cfaa3af6a5136435a3a9c Mon Sep 17 00:00:00 2001 From: Russell King Date: Tue, 16 Nov 2010 08:40:36 +0000 Subject: ARM: pgtable: provide RDONLY page table bit rather than WRITE bit Signed-off-by: Russell King --- arch/arm/mm/mmu.c | 19 +++++++++---------- arch/arm/mm/proc-macros.S | 16 ++++++++-------- arch/arm/mm/proc-v7.S | 6 +++--- arch/arm/mm/proc-xscale.S | 4 ++-- 4 files changed, 22 insertions(+), 23 deletions(-) (limited to 'arch/arm/mm') diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index bd5a94b2d610..546e44734db0 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -190,7 +190,7 @@ void adjust_cr(unsigned long mask, unsigned long set) } #endif -#define PROT_PTE_DEVICE L_PTE_PRESENT|L_PTE_YOUNG|L_PTE_DIRTY|L_PTE_WRITE|L_PTE_XN +#define PROT_PTE_DEVICE L_PTE_PRESENT|L_PTE_YOUNG|L_PTE_DIRTY|L_PTE_XN #define PROT_SECT_DEVICE PMD_TYPE_SECT|PMD_SECT_AP_WRITE static struct mem_type mem_types[] = { @@ -234,19 +234,19 @@ static struct mem_type mem_types[] = { .domain = DOMAIN_KERNEL, }, [MT_LOW_VECTORS] = { - .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY, + .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY | + L_PTE_RDONLY, .prot_l1 = PMD_TYPE_TABLE, .domain = DOMAIN_USER, }, [MT_HIGH_VECTORS] = { .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY | - L_PTE_USER, + L_PTE_USER | L_PTE_RDONLY, .prot_l1 = PMD_TYPE_TABLE, .domain = DOMAIN_USER, }, [MT_MEMORY] = { - .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY | - L_PTE_WRITE, + .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY, .prot_l1 = PMD_TYPE_TABLE, .prot_sect = PMD_TYPE_SECT | PMD_SECT_AP_WRITE, .domain = DOMAIN_KERNEL, @@ -257,21 +257,20 @@ static struct mem_type mem_types[] = { }, [MT_MEMORY_NONCACHED] = { .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY | - L_PTE_WRITE| L_PTE_MT_BUFFERABLE, + L_PTE_MT_BUFFERABLE, .prot_l1 = PMD_TYPE_TABLE, .prot_sect = PMD_TYPE_SECT | PMD_SECT_AP_WRITE, .domain = DOMAIN_KERNEL, }, [MT_MEMORY_DTCM] = { .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY | - L_PTE_WRITE | L_PTE_XN, + L_PTE_XN, .prot_l1 = PMD_TYPE_TABLE, .prot_sect = PMD_TYPE_SECT | PMD_SECT_XN, .domain = DOMAIN_KERNEL, }, [MT_MEMORY_ITCM] = { - .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY | - L_PTE_WRITE, + .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY, .prot_l1 = PMD_TYPE_TABLE, .domain = DOMAIN_KERNEL, }, @@ -478,7 +477,7 @@ static void __init build_mem_type_table(void) pgprot_user = __pgprot(L_PTE_PRESENT | L_PTE_YOUNG | user_pgprot); pgprot_kernel = __pgprot(L_PTE_PRESENT | L_PTE_YOUNG | - L_PTE_DIRTY | L_PTE_WRITE | kern_pgprot); + L_PTE_DIRTY | kern_pgprot); mem_types[MT_LOW_VECTORS].prot_l1 |= ecc_mask; mem_types[MT_HIGH_VECTORS].prot_l1 |= ecc_mask; diff --git a/arch/arm/mm/proc-macros.S b/arch/arm/mm/proc-macros.S index 4a7a9e142e85..f5ca6aaecdbd 100644 --- a/arch/arm/mm/proc-macros.S +++ b/arch/arm/mm/proc-macros.S @@ -81,7 +81,7 @@ #if L_PTE_SHARED != PTE_EXT_SHARED #error PTE shared bit mismatch #endif -#if (L_PTE_XN+L_PTE_USER+L_PTE_WRITE+L_PTE_DIRTY+L_PTE_YOUNG+\ +#if (L_PTE_XN+L_PTE_USER+L_PTE_RDONLY+L_PTE_DIRTY+L_PTE_YOUNG+\ L_PTE_FILE+L_PTE_PRESENT) > L_PTE_SHARED #error Invalid Linux PTE bit settings #endif @@ -132,9 +132,9 @@ and r2, r1, #L_PTE_MT_MASK ldr r2, [ip, r2] - tst r1, #L_PTE_WRITE - tstne r1, #L_PTE_DIRTY - orreq r3, r3, #PTE_EXT_APX + eor r1, r1, #L_PTE_DIRTY + tst r1, #L_PTE_DIRTY|L_PTE_RDONLY + orrne r3, r3, #PTE_EXT_APX tst r1, #L_PTE_USER orrne r3, r3, #PTE_EXT_AP1 @@ -172,7 +172,7 @@ .macro armv3_set_pte_ext wc_disable=1 str r1, [r0], #2048 @ linux version - eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY + eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY bic r2, r1, #PTE_SMALL_AP_MASK @ keep C, B bits bic r2, r2, #PTE_TYPE_MASK @@ -181,7 +181,7 @@ tst r3, #L_PTE_USER @ user? orrne r2, r2, #PTE_SMALL_AP_URO_SRW - tst r3, #L_PTE_WRITE | L_PTE_DIRTY @ write and dirty? + tst r3, #L_PTE_RDONLY | L_PTE_DIRTY @ write and dirty? orreq r2, r2, #PTE_SMALL_AP_UNO_SRW tst r3, #L_PTE_PRESENT | L_PTE_YOUNG @ present and young? @@ -215,7 +215,7 @@ .macro xscale_set_pte_ext_prologue str r1, [r0] @ linux version - eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY + eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY bic r2, r1, #PTE_SMALL_AP_MASK @ keep C, B bits orr r2, r2, #PTE_TYPE_EXT @ extended page @@ -223,7 +223,7 @@ tst r3, #L_PTE_USER @ user? orrne r2, r2, #PTE_EXT_AP_URO_SRW @ yes -> user r/o, system r/w - tst r3, #L_PTE_WRITE | L_PTE_DIRTY @ write and dirty? + tst r3, #L_PTE_RDONLY | L_PTE_DIRTY @ write and dirty? orreq r2, r2, #PTE_EXT_AP_UNO_SRW @ yes -> user n/a, system r/w @ combined with user -> user r/w .endm diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S index 4f5a594aa5fd..210d051c54d7 100644 --- a/arch/arm/mm/proc-v7.S +++ b/arch/arm/mm/proc-v7.S @@ -140,9 +140,9 @@ ENTRY(cpu_v7_set_pte_ext) tst r1, #1 << 4 orrne r3, r3, #PTE_EXT_TEX(1) - tst r1, #L_PTE_WRITE - tstne r1, #L_PTE_DIRTY - orreq r3, r3, #PTE_EXT_APX + eor r1, r1, #L_PTE_DIRTY + tst r1, #L_PTE_RDONLY | L_PTE_DIRTY + orrne r3, r3, #PTE_EXT_APX tst r1, #L_PTE_USER orrne r3, r3, #PTE_EXT_AP1 diff --git a/arch/arm/mm/proc-xscale.S b/arch/arm/mm/proc-xscale.S index 523408c0bb38..5a37c5e45c41 100644 --- a/arch/arm/mm/proc-xscale.S +++ b/arch/arm/mm/proc-xscale.S @@ -500,8 +500,8 @@ ENTRY(cpu_xscale_set_pte_ext) @ @ Erratum 40: must set memory to write-through for user read-only pages @ - and ip, r1, #(L_PTE_MT_MASK | L_PTE_USER | L_PTE_WRITE) & ~(4 << 2) - teq ip, #L_PTE_MT_WRITEBACK | L_PTE_USER + and ip, r1, #(L_PTE_MT_MASK | L_PTE_USER | L_PTE_RDONLY) & ~(4 << 2) + teq ip, #L_PTE_MT_WRITEBACK | L_PTE_USER | L_PTE_RDONLY moveq r1, #L_PTE_MT_WRITETHROUGH and r1, r1, #L_PTE_MT_MASK -- cgit v1.2.3