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nios2: Pseudo implement dcache_status/enable/disable()

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AFAIK the NIOS2 architecture does not have any possibility to
dynamically switch off the data cache. So _status() always reports 1 and
_enable/_disable() just issue a flush of everything.

For example, common/cmd_elf.c depends on these symbols.

Signed-off-by: Joachim Foerster <joachim.foerster@missinglinkelectronics.com>
Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
This commit is contained in:
Joachim Foerster 2011-10-20 10:28:10 +02:00 committed by Thomas Chou
parent ce5207e191
commit f956ad98b2
1 changed files with 16 additions and 0 deletions
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16
arch/nios2/cpu/cpu.c
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@ -24,6 +24,7 @@
#include <common.h>
#include <nios2.h>
#include <nios2-io.h>
#include <asm/cache.h>
#if defined (CONFIG_SYS_NIOS_SYSID_BASE)
extern void display_sysid (void);
@ -47,3 +48,18 @@ int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
nios2_callr(CONFIG_SYS_RESET_ADDR);
return 0;
}
int dcache_status(void)
{
return 1;
}
void dcache_enable(void)
{
flush_dcache(CONFIG_SYS_DCACHE_SIZE, CONFIG_SYS_DCACHELINE_SIZE);
}
void dcache_disable(void)
{
flush_dcache(CONFIG_SYS_DCACHE_SIZE, CONFIG_SYS_DCACHELINE_SIZE);
}