[PATCH v2 01/10] riscv: Remove redundant Kconfig "RISCV_NDS_CACHE"

[Yu Chien Peter Lin]

From: Leo Yu-Chi Liang <ycliang at andestech.com>

There is no need for RISCV_NDS_CACHE config to control cache switches.

Signed-off-by: Leo Yu-Chi Liang <ycliang at andestech.com>
Reviewed-by: Yu Chien Peter Lin <peterlin at andestech.com>
Reviewed-by: Rick Chen <rick at andestech.com>
---
 arch/riscv/cpu/ax25/Kconfig | 10 -----
 arch/riscv/cpu/ax25/cache.c | 84 +------------------------------------
 drivers/cache/Kconfig       |  1 -
 3 files changed, 2 insertions(+), 93 deletions(-)

diff --git a/arch/riscv/cpu/ax25/Kconfig b/arch/riscv/cpu/ax25/Kconfig
index 4a7295d30c..eca68ea2a7 100644
--- a/arch/riscv/cpu/ax25/Kconfig
+++ b/arch/riscv/cpu/ax25/Kconfig
@@ -12,13 +12,3 @@ config RISCV_NDS
 	help
 	  Run U-Boot on AndeStar V5 platforms and use some specific features
 	  which are provided by Andes Technology AndeStar V5 families.
-
-if RISCV_NDS
-
-config RISCV_NDS_CACHE
-	bool "AndeStar V5 families specific cache support"
-	depends on RISCV_MMODE || SPL_RISCV_MMODE
-	help
-	  Provide Andes Technology AndeStar V5 families specific cache support.
-
-endif
diff --git a/arch/riscv/cpu/ax25/cache.c b/arch/riscv/cpu/ax25/cache.c
index 35f23c748d..1c0c3772a1 100644
--- a/arch/riscv/cpu/ax25/cache.c
+++ b/arch/riscv/cpu/ax25/cache.c
@@ -67,106 +67,26 @@ void invalidate_dcache_range(unsigned long start, unsigned long end)
 
 void icache_enable(void)
 {
-#if !CONFIG_IS_ENABLED(SYS_ICACHE_OFF)
-#ifdef CONFIG_RISCV_NDS_CACHE
-#if CONFIG_IS_ENABLED(RISCV_MMODE)
-	asm volatile (
-		"csrr t1, mcache_ctl\n\t"
-		"ori t0, t1, 0x1\n\t"
-		"csrw mcache_ctl, t0\n\t"
-	);
-#endif
-#endif
-#endif
 }
 
 void icache_disable(void)
 {
-#if !CONFIG_IS_ENABLED(SYS_ICACHE_OFF)
-#ifdef CONFIG_RISCV_NDS_CACHE
-#if CONFIG_IS_ENABLED(RISCV_MMODE)
-	asm volatile (
-		"fence.i\n\t"
-		"csrr t1, mcache_ctl\n\t"
-		"andi t0, t1, ~0x1\n\t"
-		"csrw mcache_ctl, t0\n\t"
-	);
-#endif
-#endif
-#endif
 }
 
 void dcache_enable(void)
 {
-#if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
-#ifdef CONFIG_RISCV_NDS_CACHE
-#if CONFIG_IS_ENABLED(RISCV_MMODE)
-	asm volatile (
-		"csrr t1, mcache_ctl\n\t"
-		"ori t0, t1, 0x2\n\t"
-		"csrw mcache_ctl, t0\n\t"
-	);
-#endif
-#ifdef CONFIG_V5L2_CACHE
-	_cache_enable();
-#endif
-#endif
-#endif
 }
 
 void dcache_disable(void)
 {
-#if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
-#ifdef CONFIG_RISCV_NDS_CACHE
-#if CONFIG_IS_ENABLED(RISCV_MMODE)
-	csr_write(CCTL_REG_MCCTLCOMMAND_NUM, CCTL_L1D_WBINVAL_ALL);
-	asm volatile (
-		"csrr t1, mcache_ctl\n\t"
-		"andi t0, t1, ~0x2\n\t"
-		"csrw mcache_ctl, t0\n\t"
-	);
-#endif
-#ifdef CONFIG_V5L2_CACHE
-	_cache_disable();
-#endif
-#endif
-#endif
 }
 
 int icache_status(void)
 {
-	int ret = 0;
-
-#ifdef CONFIG_RISCV_NDS_CACHE
-#if CONFIG_IS_ENABLED(RISCV_MMODE)
-	asm volatile (
-		"csrr t1, mcache_ctl\n\t"
-		"andi	%0, t1, 0x01\n\t"
-		: "=r" (ret)
-		:
-		: "memory"
-	);
-#endif
-#endif
-
-	return ret;
+	return 0;
 }
 
 int dcache_status(void)
 {
-	int ret = 0;
-
-#ifdef CONFIG_RISCV_NDS_CACHE
-#if CONFIG_IS_ENABLED(RISCV_MMODE)
-	asm volatile (
-		"csrr t1, mcache_ctl\n\t"
-		"andi	%0, t1, 0x02\n\t"
-		: "=r" (ret)
-		:
-		: "memory"
-	);
-#endif
-#endif
-
-	return ret;
+	return 0;
 }
diff --git a/drivers/cache/Kconfig b/drivers/cache/Kconfig
index 40f41a817c..6cb8c3e980 100644
--- a/drivers/cache/Kconfig
+++ b/drivers/cache/Kconfig
@@ -25,7 +25,6 @@ config L2X0_CACHE
 config V5L2_CACHE
 	bool "Andes V5L2 cache driver"
 	select CACHE
-	depends on RISCV_NDS_CACHE
 	help
 	  Support Andes V5L2 cache controller in AE350 platform.
 	  It will configure tag and data ram timing control from the
-- 
2.34.1