diff options
Diffstat (limited to 'arch/blackfin/mach-common/cache.S')
| -rw-r--r-- | arch/blackfin/mach-common/cache.S | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/arch/blackfin/mach-common/cache.S b/arch/blackfin/mach-common/cache.S deleted file mode 100644 index 9f4dd35bfd74..000000000000 --- a/arch/blackfin/mach-common/cache.S +++ /dev/null @@ -1,124 +0,0 @@ -/* - * Blackfin cache control code - * - * Copyright 2004-2008 Analog Devices Inc. - * - * Licensed under the GPL-2 or later. - */ - -#include <linux/linkage.h> -#include <asm/blackfin.h> -#include <asm/cache.h> -#include <asm/page.h> - -/* 05000443 - IFLUSH cannot be last instruction in hardware loop */ -#if ANOMALY_05000443 -# define BROK_FLUSH_INST "IFLUSH" -#else -# define BROK_FLUSH_INST "no anomaly! yeah!" -#endif - -/* Since all L1 caches work the same way, we use the same method for flushing - * them. Only the actual flush instruction differs. We write this in asm as - * GCC can be hard to coax into writing nice hardware loops. - * - * Also, we assume the following register setup: - * R0 = start address - * R1 = end address - */ -.macro do_flush flushins:req label - - R2 = -L1_CACHE_BYTES; - - /* start = (start & -L1_CACHE_BYTES) */ - R0 = R0 & R2; - - /* end = ((end - 1) & -L1_CACHE_BYTES) + L1_CACHE_BYTES; */ - R1 += -1; - R1 = R1 & R2; - R1 += L1_CACHE_BYTES; - - /* count = (end - start) >> L1_CACHE_SHIFT */ - R2 = R1 - R0; - R2 >>= L1_CACHE_SHIFT; - P1 = R2; - -.ifnb \label -\label : -.endif - P0 = R0; - - LSETUP (1f, 2f) LC1 = P1; -1: -.ifeqs "\flushins", BROK_FLUSH_INST - \flushins [P0++]; - nop; - nop; -2: nop; -.else -2: \flushins [P0++]; -.endif - - RTS; -.endm - -#ifdef CONFIG_ICACHE_FLUSH_L1 -.section .l1.text -#else -.text -#endif - -/* Invalidate all instruction cache lines assocoiated with this memory area */ -#ifdef CONFIG_SMP -# define _blackfin_icache_flush_range _blackfin_icache_flush_range_l1 -#endif -ENTRY(_blackfin_icache_flush_range) - do_flush IFLUSH -ENDPROC(_blackfin_icache_flush_range) - -#ifdef CONFIG_SMP -.text -# undef _blackfin_icache_flush_range -ENTRY(_blackfin_icache_flush_range) - p0.L = LO(DSPID); - p0.H = HI(DSPID); - r3 = [p0]; - r3 = r3.b (z); - p2 = r3; - p0.L = _blackfin_iflush_l1_entry; - p0.H = _blackfin_iflush_l1_entry; - p0 = p0 + (p2 << 2); - p1 = [p0]; - jump (p1); -ENDPROC(_blackfin_icache_flush_range) -#endif - -#ifdef CONFIG_DCACHE_FLUSH_L1 -.section .l1.text -#else -.text -#endif - -/* Throw away all D-cached data in specified region without any obligation to - * write them back. Since the Blackfin ISA does not have an "invalidate" - * instruction, we use flush/invalidate. Perhaps as a speed optimization we - * could bang on the DTEST MMRs ... - */ -ENTRY(_blackfin_dcache_invalidate_range) - do_flush FLUSHINV -ENDPROC(_blackfin_dcache_invalidate_range) - -/* Flush all data cache lines assocoiated with this memory area */ -ENTRY(_blackfin_dcache_flush_range) - do_flush FLUSH, .Ldfr -ENDPROC(_blackfin_dcache_flush_range) - -/* Our headers convert the page structure to an address, so just need to flush - * its contents like normal. We know the start address is page aligned (which - * greater than our cache alignment), as is the end address. So just jump into - * the middle of the dcache flush function. - */ -ENTRY(_blackfin_dflush_page) - P1 = 1 << (PAGE_SHIFT - L1_CACHE_SHIFT); - jump .Ldfr; -ENDPROC(_blackfin_dflush_page) |