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mcf5282: Move cache to libcpu and update av5282 and uC5282 BSPs

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This commit is contained in:
Joel Sherrill
2014-10-14 12:39:57 -05:00
parent ed6365aa08
commit c7e77ee488
7 changed files with 169 additions and 214 deletions
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5
c/src/lib/libcpu/m68k/Makefile.am
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@@ -176,6 +176,11 @@ if mcf5282
## mcf5282/include
include_mcf5282dir = $(includedir)/mcf5282
include_mcf5282_HEADERS = mcf5282/include/mcf5282.h
noinst_PROGRAMS += mcf5282/cachepd.rel
mcf5282_cachepd_rel_SOURCES = mcf5282/cache/cachepd.c
mcf5282_cachepd_rel_CPPFLAGS = $(AM_CPPFLAGS) -I$(srcdir)/shared/cache
mcf5282_cachepd_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
endif
if mcf548x

122
c/src/lib/libcpu/m68k/mcf5282/cache/cachepd.c vendored Normal file
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@@ -0,0 +1,122 @@
/**
* @file
*
* Cache Management Support Routines for the MCF5282
*/
#include <rtems.h>
#include <mcf5282/mcf5282.h> /* internal MCF5282 modules */
#include "cache_.h"
/*
* CPU-space access
*/
#define m68k_set_acr0(_acr0) \
__asm__ volatile ("movec %0,%%acr0" : : "d" (_acr0))
#define m68k_set_acr1(_acr1) \
__asm__ volatile ("movec %0,%%acr1" : : "d" (_acr1))
#define NOP __asm__ volatile ("nop");
/*
* DEFAULT WHEN mcf5xxx_initialize_cacr not called
* Read/write copy of common cache
* Split I/D cache
* Allow CPUSHL to invalidate a cache line
* Enable buffered writes
* No burst transfers on non-cacheable accesses
* Default cache mode is *disabled* (cache only ACRx areas)
*/
static uint32_t cacr_mode = MCF5XXX_CACR_CENB |
MCF5XXX_CACR_DBWE |
MCF5XXX_CACR_DCM;
void mcf5xxx_initialize_cacr(uint32_t cacr)
{
cacr_mode = cacr;
m68k_set_cacr( cacr_mode );
}
/*
* Cannot be frozen
*/
void _CPU_cache_freeze_data(void) {}
void _CPU_cache_unfreeze_data(void) {}
void _CPU_cache_freeze_instruction(void) {}
void _CPU_cache_unfreeze_instruction(void) {}
/*
* Write-through data cache -- flushes are unnecessary
*/
void _CPU_cache_flush_1_data_line(const void *d_addr) {}
void _CPU_cache_flush_entire_data(void) {}
void _CPU_cache_enable_instruction(void)
{
rtems_interrupt_level level;
rtems_interrupt_disable(level);
cacr_mode &= ~MCF5XXX_CACR_DIDI;
m68k_set_cacr(cacr_mode | MCF5XXX_CACR_CINV | MCF5XXX_CACR_INVI );
NOP;
rtems_interrupt_enable(level);
}
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);
}
void _CPU_cache_invalidate_entire_instruction(void)
{
m68k_set_cacr(cacr_mode | MCF5XXX_CACR_CINV | MCF5XXX_CACR_INVI);
NOP;
}
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));
}
void _CPU_cache_enable_data(void)
{
rtems_interrupt_level level;
rtems_interrupt_disable(level);
cacr_mode &= ~MCF5XXX_CACR_DISD;
m68k_set_cacr(cacr_mode | MCF5XXX_CACR_CINV | MCF5XXX_CACR_INVD);
rtems_interrupt_enable(level);
}
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);
}
void _CPU_cache_invalidate_entire_data(void)
{
m68k_set_cacr(cacr_mode | MCF5XXX_CACR_CINV | MCF5XXX_CACR_INVD);
}
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));
}

6
c/src/lib/libcpu/m68k/mcf5282/include/mcf5282.h
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@@ -73,6 +73,12 @@ typedef volatile uint32 vuint32 __attribute__((__may_alias__)); /* 32 bits */
#define MCF5XXX_SR_V (0x0002)
#define MCF5XXX_SR_C (0x0001)
/*
* Used to set the initialize the cacr register to the BSP's desired
* starting value.
*/
void mcf5xxx_initialize_cacr(uint32_t);
#define MCF5XXX_CACR_CENB (0x80000000)
#define MCF5XXX_CACR_CPDI (0x10000000)
#define MCF5XXX_CACR_CPD (0x10000000)