diff options
Diffstat (limited to 'bsps/m68k/shared/cache/cache-mcf5235.c')
-rw-r--r-- | bsps/m68k/shared/cache/cache-mcf5235.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/bsps/m68k/shared/cache/cache-mcf5235.c b/bsps/m68k/shared/cache/cache-mcf5235.c new file mode 100644 index 0000000000..35390b02ef --- /dev/null +++ b/bsps/m68k/shared/cache/cache-mcf5235.c @@ -0,0 +1,101 @@ +/* + * COPYRIGHT (c) 1989-2008. + * On-Line Applications Research Corporation (OAR). + * + * 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 <mcf5235/mcf5235.h> +#include "cache.h" + +/* + * Default value for the cacr is set by the BSP + */ +extern uint32_t cacr_mode; + +/* + * Cannot be frozen + */ +static void _CPU_cache_freeze_data(void) {} +static void _CPU_cache_unfreeze_data(void) {} +static void _CPU_cache_freeze_instruction(void) {} +static void _CPU_cache_unfreeze_instruction(void) {} + +/* + * Write-through data cache -- flushes are unnecessary + */ +static void _CPU_cache_flush_1_data_line(const void *d_addr) {} +static void _CPU_cache_flush_entire_data(void) {} + +static void _CPU_cache_enable_instruction(void) +{ + rtems_interrupt_level level; + + rtems_interrupt_disable(level); + cacr_mode &= ~MCF5XXX_CACR_DIDI; + m68k_set_cacr(cacr_mode); + rtems_interrupt_enable(level); +} + +static void _CPU_cache_disable_instruction(void) +{ + rtems_interrupt_level level; + + rtems_interrupt_disable(level); + cacr_mode |= MCF5XXX_CACR_DIDI; + m68k_set_cacr(cacr_mode); + rtems_interrupt_enable(level); +} + +static void _CPU_cache_invalidate_entire_instruction(void) +{ + m68k_set_cacr(cacr_mode | MCF5XXX_CACR_CINV | MCF5XXX_CACR_INVI); +} + +static void _CPU_cache_invalidate_1_instruction_line(const void *addr) +{ + /* + * Top half of cache is I-space + */ + addr = (void *)((int)addr | 0x400); + __asm__ volatile ("cpushl %%bc,(%0)" :: "a" (addr)); +} + +static void _CPU_cache_enable_data(void) +{ + rtems_interrupt_level level; + + rtems_interrupt_disable(level); + cacr_mode &= ~MCF5XXX_CACR_DISD; + m68k_set_cacr(cacr_mode); + rtems_interrupt_enable(level); +} + +static void _CPU_cache_disable_data(void) +{ + rtems_interrupt_level level; + + rtems_interrupt_disable(level); + cacr_mode |= MCF5XXX_CACR_DISD; + m68k_set_cacr(cacr_mode); + rtems_interrupt_enable(level); +} + +static void _CPU_cache_invalidate_entire_data(void) +{ + m68k_set_cacr(cacr_mode | MCF5XXX_CACR_CINV | MCF5XXX_CACR_INVD); +} + +static void _CPU_cache_invalidate_1_data_line(const void *addr) +{ + /* + * Bottom half of cache is D-space + */ + addr = (void *)((int)addr & ~0x400); + __asm__ volatile ("cpushl %%bc,(%0)" :: "a" (addr)); +} + +#include "../../../shared/cache/cacheimpl.h" |