4 * SH-4 specific TLB operations
6 * Copyright (C) 1999 Niibe Yutaka
7 * Copyright (C) 2002 Paul Mundt
9 * Released under the terms of the GNU GPL v2.0.
11 #include <linux/signal.h>
12 #include <linux/sched.h>
13 #include <linux/kernel.h>
14 #include <linux/errno.h>
15 #include <linux/string.h>
16 #include <linux/types.h>
17 #include <linux/ptrace.h>
18 #include <linux/mman.h>
20 #include <linux/smp.h>
21 #include <linux/smp_lock.h>
22 #include <linux/interrupt.h>
24 #include <asm/system.h>
26 #include <asm/uaccess.h>
27 #include <asm/pgalloc.h>
28 #include <asm/mmu_context.h>
29 #include <asm/cacheflush.h>
31 void update_mmu_cache(struct vm_area_struct
* vma
,
32 unsigned long address
, pte_t pte
)
40 /* Ptrace may call this routine. */
41 if (vma
&& current
->active_mm
!= vma
->vm_mm
)
46 page
= pfn_to_page(pfn
);
47 if (!test_bit(PG_mapped
, &page
->flags
)) {
48 unsigned long phys
= pte_val(pte
) & PTE_PHYS_MASK
;
49 __flush_wback_region((void *)P1SEGADDR(phys
), PAGE_SIZE
);
50 __set_bit(PG_mapped
, &page
->flags
);
54 local_irq_save(flags
);
56 /* Set PTEH register */
57 vpn
= (address
& MMU_VPN_MASK
) | get_asid();
58 ctrl_outl(vpn
, MMU_PTEH
);
60 pteval
= pte_val(pte
);
62 /* Set PTEA register */
63 if (cpu_data
->flags
& CPU_HAS_PTEA
)
64 /* TODO: make this look less hacky */
65 ctrl_outl(((pteval
>> 28) & 0xe) | (pteval
& 0x1), MMU_PTEA
);
67 /* Set PTEL register */
68 pteval
&= _PAGE_FLAGS_HARDWARE_MASK
; /* drop software flags */
69 #ifdef CONFIG_SH_WRITETHROUGH
72 /* conveniently, we want all the software flags to be 0 anyway */
73 ctrl_outl(pteval
, MMU_PTEL
);
76 asm volatile("ldtlb": /* no output */ : /* no input */ : "memory");
77 local_irq_restore(flags
);
80 void local_flush_tlb_one(unsigned long asid
, unsigned long page
)
82 unsigned long addr
, data
;
85 * NOTE: PTEH.ASID should be set to this MM
86 * _AND_ we need to write ASID to the array.
88 * It would be simple if we didn't need to set PTEH.ASID...
90 addr
= MMU_UTLB_ADDRESS_ARRAY
| MMU_PAGE_ASSOC_BIT
;
91 data
= page
| asid
; /* VALID bit is off */
93 ctrl_outl(data
, addr
);