forked from Imagelibrary/rtems
5e77d12951
routine naming to follow RTEMS package/object.method rule. This patch also eliminated calls to the obsolete routine m68k_enable_caching.
89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
/*
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* Cache Management Support Routines for the i386
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*
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* $Id$
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*/
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#include <rtems.h>
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#include <libcpu/registers.h>
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#include "cache_.h"
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void _CPU_disable_cache() {
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cr0 regCr0;
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regCr0.i = i386_get_cr0();
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regCr0.cr0.page_level_cache_disable = 1;
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regCr0.cr0.no_write_through = 1;
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i386_set_cr0( regCr0.i );
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rtems_cache_flush_entire_data();
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}
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/*
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* Enable the entire cache
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*/
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void _CPU_enable_cache() {
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cr0 regCr0;
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regCr0.i = i386_get_cr0();
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regCr0.cr0.page_level_cache_disable = 0;
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regCr0.cr0.no_write_through = 0;
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i386_set_cr0( regCr0.i );
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/*rtems_cache_flush_entire_data();*/
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}
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/*
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* CACHE MANAGER: The following functions are CPU-specific.
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* They provide the basic implementation for the rtems_* cache
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* management routines. If a given function has no meaning for the CPU,
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* it does nothing by default.
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*
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* FIXME: The routines below should be implemented per CPU,
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* to accomodate the capabilities of each.
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*/
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#if defined(I386_CACHE_ALIGNMENT)
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void _CPU_cache_flush_1_data_line(const void *d_addr) {}
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void _CPU_cache_invalidate_1_data_line(const void *d_addr) {}
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void _CPU_cache_freeze_data(void) {}
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void _CPU_cache_unfreeze_data(void) {}
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void _CPU_cache_invalidate_1_instruction_line ( const void *d_addr ) {}
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void _CPU_cache_freeze_instruction(void) {}
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void _CPU_cache_unfreeze_instruction(void) {}
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void _CPU_cache_flush_entire_data(void)
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{
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asm volatile ("wbinvd");
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}
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void _CPU_cache_invalidate_entire_data(void)
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{
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asm volatile ("invd");
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}
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void _CPU_cache_enable_data(void)
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{
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_CPU_enable_cache();
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}
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void _CPU_cache_disable_data(void)
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{
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_CPU_disable_cache();
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}
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void _CPU_cache_invalidate_entire_instruction(void)
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{
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asm volatile ("invd");
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}
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void _CPU_cache_enable_instruction(void)
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{
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_CPU_enable_cache();
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}
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void _CPU_cache_disable_instruction( void )
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{
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_CPU_disable_cache();
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}
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#endif
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