sh: Revert lazy dcache writeback changes.
These ended up causing too many problems on older parts,
revert for now..
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/mm/tlb-sh3.c b/arch/sh/mm/tlb-sh3.c
index e5e76eb..7fbfd5a 100644
--- a/arch/sh/mm/tlb-sh3.c
+++ b/arch/sh/mm/tlb-sh3.c
@@ -8,9 +8,69 @@
*
* Released under the terms of the GNU GPL v2.0.
*/
-#include <linux/io.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/ptrace.h>
+#include <linux/mman.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/interrupt.h>
+
#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/pgalloc.h>
#include <asm/mmu_context.h>
+#include <asm/cacheflush.h>
+
+void update_mmu_cache(struct vm_area_struct * vma,
+ unsigned long address, pte_t pte)
+{
+ unsigned long flags;
+ unsigned long pteval;
+ unsigned long vpn;
+
+ /* Ptrace may call this routine. */
+ if (vma && current->active_mm != vma->vm_mm)
+ return;
+
+#if defined(CONFIG_SH7705_CACHE_32KB)
+ {
+ struct page *page = pte_page(pte);
+ unsigned long pfn = pte_pfn(pte);
+
+ if (pfn_valid(pfn) && !test_bit(PG_mapped, &page->flags)) {
+ unsigned long phys = pte_val(pte) & PTE_PHYS_MASK;
+
+ __flush_wback_region((void *)P1SEGADDR(phys),
+ PAGE_SIZE);
+ __set_bit(PG_mapped, &page->flags);
+ }
+ }
+#endif
+
+ local_irq_save(flags);
+
+ /* Set PTEH register */
+ vpn = (address & MMU_VPN_MASK) | get_asid();
+ ctrl_outl(vpn, MMU_PTEH);
+
+ pteval = pte_val(pte);
+
+ /* Set PTEL register */
+ pteval &= _PAGE_FLAGS_HARDWARE_MASK; /* drop software flags */
+ /* 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);
+}
void local_flush_tlb_one(unsigned long asid, unsigned long page)
{
@@ -34,3 +94,4 @@
for (i = 0; i < ways; i++)
ctrl_outl(data, addr + (i << 8));
}
+