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-rw-r--r--arch/sh/mm/tlb-flush.c101
1 files changed, 80 insertions, 21 deletions
diff --git a/arch/sh/mm/tlb-flush.c b/arch/sh/mm/tlb-flush.c
index 73ec7f6084f..d2f7b4a2eb0 100644
--- a/arch/sh/mm/tlb-flush.c
+++ b/arch/sh/mm/tlb-flush.c
@@ -2,24 +2,28 @@
* TLB flushing operations for SH with an MMU.
*
* Copyright (C) 1999 Niibe Yutaka
- * Copyright (C) 2003 Paul Mundt
+ * Copyright (C) 2003 - 2006 Paul Mundt
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/mm.h>
+#include <linux/io.h>
#include <asm/mmu_context.h>
#include <asm/tlbflush.h>
+#include <asm/cacheflush.h>
-void flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
+void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
{
- if (vma->vm_mm && vma->vm_mm->context.id != NO_CONTEXT) {
+ unsigned int cpu = smp_processor_id();
+
+ if (vma->vm_mm && cpu_context(cpu, vma->vm_mm) != NO_CONTEXT) {
unsigned long flags;
unsigned long asid;
unsigned long saved_asid = MMU_NO_ASID;
- asid = vma->vm_mm->context.id & MMU_CONTEXT_ASID_MASK;
+ asid = cpu_asid(cpu, vma->vm_mm);
page &= PAGE_MASK;
local_irq_save(flags);
@@ -27,33 +31,34 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
saved_asid = get_asid();
set_asid(asid);
}
- __flush_tlb_page(asid, page);
+ local_flush_tlb_one(asid, page);
if (saved_asid != MMU_NO_ASID)
set_asid(saved_asid);
local_irq_restore(flags);
}
}
-void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
- unsigned long end)
+void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
+ unsigned long end)
{
struct mm_struct *mm = vma->vm_mm;
+ unsigned int cpu = smp_processor_id();
- if (mm->context.id != NO_CONTEXT) {
+ if (cpu_context(cpu, mm) != NO_CONTEXT) {
unsigned long flags;
int size;
local_irq_save(flags);
size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
if (size > (MMU_NTLB_ENTRIES/4)) { /* Too many TLB to flush */
- mm->context.id = NO_CONTEXT;
+ cpu_context(cpu, mm) = NO_CONTEXT;
if (mm == current->mm)
- activate_context(mm);
+ activate_context(mm, cpu);
} else {
unsigned long asid;
unsigned long saved_asid = MMU_NO_ASID;
- asid = mm->context.id & MMU_CONTEXT_ASID_MASK;
+ asid = cpu_asid(cpu, mm);
start &= PAGE_MASK;
end += (PAGE_SIZE - 1);
end &= PAGE_MASK;
@@ -62,7 +67,7 @@ void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
set_asid(asid);
}
while (start < end) {
- __flush_tlb_page(asid, start);
+ local_flush_tlb_one(asid, start);
start += PAGE_SIZE;
}
if (saved_asid != MMU_NO_ASID)
@@ -72,26 +77,27 @@ void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
}
}
-void flush_tlb_kernel_range(unsigned long start, unsigned long end)
+void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
{
+ unsigned int cpu = smp_processor_id();
unsigned long flags;
int size;
local_irq_save(flags);
size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
if (size > (MMU_NTLB_ENTRIES/4)) { /* Too many TLB to flush */
- flush_tlb_all();
+ local_flush_tlb_all();
} else {
unsigned long asid;
unsigned long saved_asid = get_asid();
- asid = init_mm.context.id & MMU_CONTEXT_ASID_MASK;
+ asid = cpu_asid(cpu, &init_mm);
start &= PAGE_MASK;
end += (PAGE_SIZE - 1);
end &= PAGE_MASK;
set_asid(asid);
while (start < end) {
- __flush_tlb_page(asid, start);
+ local_flush_tlb_one(asid, start);
start += PAGE_SIZE;
}
set_asid(saved_asid);
@@ -99,22 +105,24 @@ void flush_tlb_kernel_range(unsigned long start, unsigned long end)
local_irq_restore(flags);
}
-void flush_tlb_mm(struct mm_struct *mm)
+void local_flush_tlb_mm(struct mm_struct *mm)
{
+ unsigned int cpu = smp_processor_id();
+
/* Invalidate all TLB of this process. */
/* Instead of invalidating each TLB, we get new MMU context. */
- if (mm->context.id != NO_CONTEXT) {
+ if (cpu_context(cpu, mm) != NO_CONTEXT) {
unsigned long flags;
local_irq_save(flags);
- mm->context.id = NO_CONTEXT;
+ cpu_context(cpu, mm) = NO_CONTEXT;
if (mm == current->mm)
- activate_context(mm);
+ activate_context(mm, cpu);
local_irq_restore(flags);
}
}
-void flush_tlb_all(void)
+void local_flush_tlb_all(void)
{
unsigned long flags, status;
@@ -132,3 +140,54 @@ void flush_tlb_all(void)
ctrl_barrier();
local_irq_restore(flags);
}
+
+void update_mmu_cache(struct vm_area_struct *vma,
+ unsigned long address, pte_t pte)
+{
+ unsigned long flags;
+ unsigned long pteval;
+ unsigned long vpn;
+ struct page *page;
+ unsigned long pfn = pte_pfn(pte);
+ struct address_space *mapping;
+
+ if (!pfn_valid(pfn))
+ return;
+
+ page = pfn_to_page(pfn);
+ mapping = page_mapping(page);
+ if (mapping) {
+ unsigned long phys = pte_val(pte) & PTE_PHYS_MASK;
+ int dirty = test_and_clear_bit(PG_dcache_dirty, &page->flags);
+
+ if (dirty)
+ __flush_wback_region((void *)P1SEGADDR(phys),
+ PAGE_SIZE);
+ }
+
+ local_irq_save(flags);
+
+ /* Set PTEH register */
+ vpn = (address & MMU_VPN_MASK) | get_asid();
+ ctrl_outl(vpn, MMU_PTEH);
+
+ pteval = pte_val(pte);
+
+#ifdef CONFIG_CPU_HAS_PTEA
+ /* Set PTEA register */
+ /* TODO: make this look less hacky */
+ ctrl_outl(((pteval >> 28) & 0xe) | (pteval & 0x1), MMU_PTEA);
+#endif
+
+ /* Set PTEL register */
+ pteval &= _PAGE_FLAGS_HARDWARE_MASK; /* drop software flags */
+#if defined(CONFIG_SH_WRITETHROUGH) && defined(CONFIG_CPU_SH4)
+ pteval |= _PAGE_WT;
+#endif
+ /* conveniently, we want all the software flags to be 0 anyway */
+ ctrl_outl(pteval, MMU_PTEL);
+
+ /* Load the TLB */
+ asm volatile("ldtlb": /* no output */ : /* no input */ : "memory");
+ local_irq_restore(flags);
+}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-27 07:39:23 +0000