4 * SH-4 specific TLB operations
6 * Copyright (C) 1999 Niibe Yutaka
7 * Copyright (C) 2002 - 2007 Paul Mundt
9 * Released under the terms of the GNU GPL v2.0.
11 #include <linux/kernel.h>
14 #include <asm/system.h>
15 #include <asm/mmu_context.h>
16 #include <asm/cacheflush.h>
18 void update_mmu_cache(struct vm_area_struct * vma,
19 unsigned long address, pte_t pte)
25 /* Ptrace may call this routine. */
26 if (vma && current->active_mm != vma->vm_mm)
29 #ifndef CONFIG_CACHE_OFF
31 unsigned long pfn = pte_pfn(pte);
34 struct page *page = pfn_to_page(pfn);
36 if (!test_bit(PG_mapped, &page->flags)) {
37 unsigned long phys = pte_val(pte) & PTE_PHYS_MASK;
38 __flush_wback_region((void *)P1SEGADDR(phys),
40 __set_bit(PG_mapped, &page->flags);
46 local_irq_save(flags);
48 /* Set PTEH register */
49 vpn = (address & MMU_VPN_MASK) | get_asid();
50 ctrl_outl(vpn, MMU_PTEH);
54 /* Set PTEA register */
57 * For the extended mode TLB this is trivial, only the ESZ and
58 * EPR bits need to be written out to PTEA, with the remainder of
59 * the protection bits (with the exception of the compat-mode SZ
60 * and PR bits, which are cleared) being written out in PTEL.
62 ctrl_outl(pte.pte_high, MMU_PTEA);
64 if (cpu_data->flags & CPU_HAS_PTEA) {
65 /* The last 3 bits and the first one of pteval contains
66 * the PTEA timing control and space attribute bits
68 ctrl_outl(copy_ptea_attributes(pteval), MMU_PTEA);
72 /* Set PTEL register */
73 pteval &= _PAGE_FLAGS_HARDWARE_MASK; /* drop software flags */
74 #ifdef CONFIG_CACHE_WRITETHROUGH
77 /* conveniently, we want all the software flags to be 0 anyway */
78 ctrl_outl(pteval, MMU_PTEL);
81 asm volatile("ldtlb": /* no output */ : /* no input */ : "memory");
82 local_irq_restore(flags);
85 void __uses_jump_to_uncached local_flush_tlb_one(unsigned long asid,
88 unsigned long addr, data;
91 * NOTE: PTEH.ASID should be set to this MM
92 * _AND_ we need to write ASID to the array.
94 * It would be simple if we didn't need to set PTEH.ASID...
96 addr = MMU_UTLB_ADDRESS_ARRAY | MMU_PAGE_ASSOC_BIT;
97 data = page | asid; /* VALID bit is off */
99 ctrl_outl(data, addr);