[U-Boot] [RFC PATCH] 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.foerster at missinglinkelectronics.com>
---
 arch/nios2/cpu/cpu.c |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/arch/nios2/cpu/cpu.c b/arch/nios2/cpu/cpu.c
index ef360ee..01dd057 100644
--- a/arch/nios2/cpu/cpu.c
+++ b/arch/nios2/cpu/cpu.c
@@ -47,3 +47,20 @@ 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);
+	return;
+}
+
+void dcache_disable(void)
+{
+	flush_dcache(CONFIG_SYS_DCACHE_SIZE, CONFIG_SYS_DCACHELINE_SIZE);
+	return;
+}
-- 
1.7.6