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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* COPYRIGHT (c) 1989-2008.
* On-Line Applications Research Corporation (OAR).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#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"
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