Re: [U-Boot] [PATCH v2] nios2: Pseudo implement dcache_status/enable/disable()

[Thomas Chou]

On 10/18/2011 12:35 AM, Joachim Foerster wrote:
 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 Foersterjoachim.foers...@missinglinkelectronics.com
 ---
 Changes for v2:
   - Remove return; from added void functions

   arch/nios2/cpu/cpu.c |   15 +++
   1 files changed, 15 insertions(+), 0 deletions(-)

Hi Joachim,

I got this warning. Please fix it with appropriate header. Thanks.

Configuring for nios2-generic board...
cpu.c: In function 'dcache_enable':
cpu.c:58: warning: implicit declaration of function 'flush_dcache'

Best regards,
Thomas
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[U-Boot] [PATCH v2] nios2: Pseudo implement dcache_status/enable/disable()

[Joachim Foerster]

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.foers...@missinglinkelectronics.com
---
Changes for v2:
- Remove return; from added void functions

 arch/nios2/cpu/cpu.c |   15 +++
 1 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/arch/nios2/cpu/cpu.c b/arch/nios2/cpu/cpu.c
index ef360ee..c9ce390 100644
--- a/arch/nios2/cpu/cpu.c
+++ b/arch/nios2/cpu/cpu.c
@@ -47,3 +47,18 @@ 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);
+}
-- 
1.7.6

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