diff options
Diffstat (limited to 'c/src/lib/libcpu/bfin/cache/cache.c')
-rw-r--r-- | c/src/lib/libcpu/bfin/cache/cache.c | 125 |
1 files changed, 0 insertions, 125 deletions
diff --git a/c/src/lib/libcpu/bfin/cache/cache.c b/c/src/lib/libcpu/bfin/cache/cache.c deleted file mode 100644 index cc60904f8c..0000000000 --- a/c/src/lib/libcpu/bfin/cache/cache.c +++ /dev/null @@ -1,125 +0,0 @@ -/* Blackfin Cache Support - * - * Copyright (c) 2008 Kallisti Labs, Los Gatos, CA, USA - * written by Allan Hessenflow <allanh@kallisti.com> - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. - */ - - -#include <rtems.h> -#include <bsp.h> -#include <libcpu/memoryRegs.h> -#include "cache_.h" - - -/* There are many syncs in the following code because they should be - harmless except for wasting time, and this is easier than figuring out - exactly where they're needed to protect from the effects of write - buffers and queued reads. Many of them are likely unnecessary. */ - - -void _CPU_cache_flush_1_data_line(const void *d_addr) { - - __asm__ __volatile__ ("ssync; flush [%0]; ssync" :: "a" (d_addr)); -} - -/* Blackfins can't just invalidate cache; they can only do flush + - invalidate. If the line isn't dirty then this is equivalent to - just an invalidate. Even if it is dirty, this should still be - okay since with a pure invalidate method the caller would have no - way to insure the dirty line hadn't been written out anyway prior - to the invalidate. */ -void _CPU_cache_invalidate_1_data_line(const void *d_addr) { - - __asm__ __volatile__ ("ssync; flushinv [%0]; ssync" :: "a" (d_addr)); -} - -void _CPU_cache_freeze_data(void) { -} - -void _CPU_cache_unfreeze_data(void) { -} - -void _CPU_cache_invalidate_1_instruction_line(const void *d_addr) { - - __asm__ __volatile__ ("ssync; iflush [%0]; ssync" :: "a" (d_addr)); -} - -void _CPU_cache_freeze_instruction(void) { -} - -void _CPU_cache_unfreeze_instruction(void) { -} - -/* incredibly inefficient... It would be better to make use of the - DTEST_COMMAND/DTEST_DATAx registers to find the addresses in each - cache line and flush just those. However the documentation I've - seen on those is a bit sketchy, and I sure wouldn't want to get it - wrong. */ -void _CPU_cache_flush_entire_data(void) { - uint32_t i; - - i = 0; - __asm__ __volatile__ ("ssync"); - do { - __asm__ __volatile__ ("flush [%0]" :: "a" (i)); - i += CPU_DATA_CACHE_ALIGNMENT; - } while (i); - __asm__ __volatile__ ("ssync"); -} - -void _CPU_cache_invalidate_entire_data(void) { - uint32_t dmemControl; - - __asm__ __volatile__ ("ssync"); - dmemControl = *(uint32_t volatile *) DMEM_CONTROL; - *(uint32_t volatile *) DMEM_CONTROL = dmemControl & ~DMEM_CONTROL_DMC_MASK; - *(uint32_t volatile *) DMEM_CONTROL = dmemControl; - __asm__ __volatile__ ("ssync"); -} - -/* this does not actually enable data cache unless CPLBs are also enabled. - LIBCPU_DATA_CACHE_CONFIG contains the DMEM_CONTROL_DMC bits to set. */ -void _CPU_cache_enable_data(void) { - - __asm__ __volatile__ ("ssync"); - *(uint32_t volatile *) DMEM_CONTROL |= LIBCPU_DATA_CACHE_CONFIG; - __asm__ __volatile__ ("ssync"); -} - -void _CPU_cache_disable_data(void) { - - __asm__ __volatile__ ("ssync"); - *(uint32_t volatile *) DMEM_CONTROL &= ~DMEM_CONTROL_DMC_MASK; - __asm__ __volatile__ ("ssync"); -} - -void _CPU_cache_invalidate_entire_instruction(void) { - uint32_t imemControl; - - __asm__ __volatile__ ("ssync"); - imemControl = *(uint32_t volatile *) IMEM_CONTROL; - *(uint32_t volatile *) IMEM_CONTROL = imemControl & ~IMEM_CONTROL_IMC; - *(uint32_t volatile *) IMEM_CONTROL = imemControl; - __asm__ __volatile__ ("ssync"); -} - -/* this only actually enables the instruction cache if the CPLBs are also - enabled. */ -void _CPU_cache_enable_instruction(void) { - - __asm__ __volatile__ ("ssync"); - *(uint32_t volatile *) IMEM_CONTROL |= IMEM_CONTROL_IMC; - __asm__ __volatile__ ("ssync"); -} - -void _CPU_cache_disable_instruction(void) { - - __asm__ __volatile__ ("ssync"); - *(uint32_t volatile *) IMEM_CONTROL &= ~IMEM_CONTROL_IMC; - __asm__ __volatile__ ("ssync"); -} - |