| Mike Frysinger | 94bae5c | 2008-03-30 15:46:13 -0400 | [diff] [blame] | 1 | /* cache.S - low level cache handling routines |
| 2 | * Copyright (C) 2003-2007 Analog Devices Inc. |
| 3 | * Licensed under the GPL-2 or later. |
| 4 | */ |
| 5 | |
| 6 | #include <asm/linkage.h> |
| 7 | #include <config.h> |
| 8 | #include <asm/blackfin.h> |
| 9 | |
| 10 | .text |
| 11 | .align 2 |
| 12 | ENTRY(_blackfin_icache_flush_range) |
| 13 | R2 = -32; |
| 14 | R2 = R0 & R2; |
| 15 | P0 = R2; |
| 16 | P1 = R1; |
| 17 | CSYNC; |
| 18 | 1: |
| 19 | IFLUSH[P0++]; |
| 20 | CC = P0 < P1(iu); |
| 21 | IF CC JUMP 1b(bp); |
| 22 | IFLUSH[P0]; |
| 23 | SSYNC; |
| 24 | RTS; |
| 25 | ENDPROC(_blackfin_icache_flush_range) |
| 26 | |
| 27 | ENTRY(_blackfin_dcache_flush_range) |
| 28 | R2 = -32; |
| 29 | R2 = R0 & R2; |
| 30 | P0 = R2; |
| 31 | P1 = R1; |
| 32 | CSYNC; |
| 33 | 1: |
| 34 | FLUSH[P0++]; |
| 35 | CC = P0 < P1(iu); |
| 36 | IF CC JUMP 1b(bp); |
| 37 | FLUSH[P0]; |
| 38 | SSYNC; |
| 39 | RTS; |
| 40 | ENDPROC(_blackfin_dcache_flush_range) |
| 41 | |
| 42 | ENTRY(_blackfin_dcache_invalidate_range) |
| 43 | R2 = -32; |
| 44 | R2 = R0 & R2; |
| 45 | P0 = R2; |
| 46 | P1 = R1; |
| 47 | CSYNC; |
| 48 | 1: |
| 49 | FLUSHINV[P0++]; |
| 50 | CC = P0 < P1(iu); |
| 51 | IF CC JUMP 1b(bp); |
| 52 | |
| 53 | /* |
| 54 | * If the data crosses a cache line, then we'll be pointing to |
| 55 | * the last cache line, but won't have flushed/invalidated it yet, so do |
| 56 | * one more. |
| 57 | */ |
| 58 | FLUSHINV[P0]; |
| 59 | SSYNC; |
| 60 | RTS; |
| 61 | ENDPROC(_blackfin_dcache_invalidate_range) |