diff options
Diffstat (limited to 'arch/arm/mm/tlb-fa.S')
| -rw-r--r-- | arch/arm/mm/tlb-fa.S | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/arch/arm/mm/tlb-fa.S b/arch/arm/mm/tlb-fa.S new file mode 100644 index 000000000000..9694f1f6f485 --- /dev/null +++ b/arch/arm/mm/tlb-fa.S | |||
| @@ -0,0 +1,75 @@ | |||
| 1 | /* | ||
| 2 | * linux/arch/arm/mm/tlb-fa.S | ||
| 3 | * | ||
| 4 | * Copyright (C) 2005 Faraday Corp. | ||
| 5 | * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt> | ||
| 6 | * | ||
| 7 | * Based on tlb-v4wbi.S: | ||
| 8 | * Copyright (C) 1997-2002 Russell King | ||
| 9 | * | ||
| 10 | * This program is free software; you can redistribute it and/or modify | ||
| 11 | * it under the terms of the GNU General Public License version 2 as | ||
| 12 | * published by the Free Software Foundation. | ||
| 13 | * | ||
| 14 | * ARM architecture version 4, Faraday variation. | ||
| 15 | * This assume an unified TLBs, with a write buffer, and branch target buffer (BTB) | ||
| 16 | * | ||
| 17 | * Processors: FA520 FA526 FA626 | ||
| 18 | */ | ||
| 19 | #include <linux/linkage.h> | ||
| 20 | #include <linux/init.h> | ||
| 21 | #include <asm/asm-offsets.h> | ||
| 22 | #include <asm/tlbflush.h> | ||
| 23 | #include "proc-macros.S" | ||
| 24 | |||
| 25 | |||
| 26 | /* | ||
| 27 | * flush_user_tlb_range(start, end, mm) | ||
| 28 | * | ||
| 29 | * Invalidate a range of TLB entries in the specified address space. | ||
| 30 | * | ||
| 31 | * - start - range start address | ||
| 32 | * - end - range end address | ||
| 33 | * - mm - mm_struct describing address space | ||
| 34 | */ | ||
| 35 | .align 4 | ||
| 36 | ENTRY(fa_flush_user_tlb_range) | ||
| 37 | vma_vm_mm ip, r2 | ||
| 38 | act_mm r3 @ get current->active_mm | ||
| 39 | eors r3, ip, r3 @ == mm ? | ||
| 40 | movne pc, lr @ no, we dont do anything | ||
| 41 | mov r3, #0 | ||
| 42 | mcr p15, 0, r3, c7, c10, 4 @ drain WB | ||
| 43 | bic r0, r0, #0x0ff | ||
| 44 | bic r0, r0, #0xf00 | ||
| 45 | 1: mcr p15, 0, r0, c8, c7, 1 @ invalidate UTLB entry | ||
| 46 | add r0, r0, #PAGE_SZ | ||
| 47 | cmp r0, r1 | ||
| 48 | blo 1b | ||
| 49 | mcr p15, 0, r3, c7, c5, 6 @ invalidate BTB | ||
| 50 | mcr p15, 0, r3, c7, c10, 4 @ data write barrier | ||
| 51 | mov pc, lr | ||
| 52 | |||
| 53 | |||
| 54 | ENTRY(fa_flush_kern_tlb_range) | ||
| 55 | mov r3, #0 | ||
| 56 | mcr p15, 0, r3, c7, c10, 4 @ drain WB | ||
| 57 | bic r0, r0, #0x0ff | ||
| 58 | bic r0, r0, #0xf00 | ||
| 59 | 1: mcr p15, 0, r0, c8, c7, 1 @ invalidate UTLB entry | ||
| 60 | add r0, r0, #PAGE_SZ | ||
| 61 | cmp r0, r1 | ||
| 62 | blo 1b | ||
| 63 | mcr p15, 0, r3, c7, c5, 6 @ invalidate BTB | ||
| 64 | mcr p15, 0, r3, c7, c10, 4 @ data write barrier | ||
| 65 | mcr p15, 0, r3, c7, c5, 4 @ prefetch flush | ||
| 66 | mov pc, lr | ||
| 67 | |||
| 68 | __INITDATA | ||
| 69 | |||
| 70 | .type fa_tlb_fns, #object | ||
| 71 | ENTRY(fa_tlb_fns) | ||
| 72 | .long fa_flush_user_tlb_range | ||
| 73 | .long fa_flush_kern_tlb_range | ||
| 74 | .long fa_tlb_flags | ||
| 75 | .size fa_tlb_fns, . - fa_tlb_fns | ||