riscv: ax25: cache: Add SPL_RISCV_MMODE for SPL
The mcache_ctl csr only can be manipulated in M mode.
Add SPL_RISCV_MMODE for U-Boot SPL to control cache
operation.
Signed-off-by: Rick Chen <rick@andestech.com>
Cc: KC Lin <kclin@andestech.com>
Cc: Alan Kao <alankao@andestech.com>
diff --git a/arch/riscv/cpu/ax25/cache.c b/arch/riscv/cpu/ax25/cache.c
index 1455f22..9f42419 100644
--- a/arch/riscv/cpu/ax25/cache.c
+++ b/arch/riscv/cpu/ax25/cache.c
@@ -12,18 +12,46 @@
#include <asm/csr.h>
#ifdef CONFIG_RISCV_NDS_CACHE
+#if CONFIG_IS_ENABLED(RISCV_MMODE) || CONFIG_IS_ENABLED(SPL_RISCV_MMODE)
/* mcctlcommand */
#define CCTL_REG_MCCTLCOMMAND_NUM 0x7cc
/* D-cache operation */
#define CCTL_L1D_WBINVAL_ALL 6
#endif
+#endif
+
+#ifdef CONFIG_V5L2_CACHE
+static void _cache_enable(void)
+{
+ struct udevice *dev = NULL;
+
+ uclass_find_first_device(UCLASS_CACHE, &dev);
+
+ if (dev)
+ cache_enable(dev);
+}
+
+static void _cache_disable(void)
+{
+ struct udevice *dev = NULL;
+
+ uclass_find_first_device(UCLASS_CACHE, &dev);
+
+ if (dev)
+ cache_disable(dev);
+}
+#endif
void flush_dcache_all(void)
{
+#if !CONFIG_IS_ENABLED(SYS_ICACHE_OFF)
#ifdef CONFIG_RISCV_NDS_CACHE
+#if CONFIG_IS_ENABLED(RISCV_MMODE) || CONFIG_IS_ENABLED(SPL_RISCV_MMODE)
csr_write(CCTL_REG_MCCTLCOMMAND_NUM, CCTL_L1D_WBINVAL_ALL);
#endif
+#endif
+#endif
}
void flush_dcache_range(unsigned long start, unsigned long end)
@@ -40,6 +68,7 @@
{
#if !CONFIG_IS_ENABLED(SYS_ICACHE_OFF)
#ifdef CONFIG_RISCV_NDS_CACHE
+#if CONFIG_IS_ENABLED(RISCV_MMODE) || CONFIG_IS_ENABLED(SPL_RISCV_MMODE)
asm volatile (
"csrr t1, mcache_ctl\n\t"
"ori t0, t1, 0x1\n\t"
@@ -47,12 +76,14 @@
);
#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) || CONFIG_IS_ENABLED(SPL_RISCV_MMODE)
asm volatile (
"fence.i\n\t"
"csrr t1, mcache_ctl\n\t"
@@ -61,24 +92,23 @@
);
#endif
#endif
+#endif
}
void dcache_enable(void)
{
#if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
#ifdef CONFIG_RISCV_NDS_CACHE
- struct udevice *dev = NULL;
-
+#if CONFIG_IS_ENABLED(RISCV_MMODE) || CONFIG_IS_ENABLED(SPL_RISCV_MMODE)
asm volatile (
"csrr t1, mcache_ctl\n\t"
"ori t0, t1, 0x2\n\t"
"csrw mcache_ctl, t0\n\t"
);
-
- uclass_find_first_device(UCLASS_CACHE, &dev);
-
- if (dev)
- cache_enable(dev);
+#endif
+#ifdef CONFIG_V5L2_CACHE
+ _cache_enable();
+#endif
#endif
#endif
}
@@ -87,21 +117,19 @@
{
#if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
#ifdef CONFIG_RISCV_NDS_CACHE
- struct udevice *dev = NULL;
-
+#if CONFIG_IS_ENABLED(RISCV_MMODE) || CONFIG_IS_ENABLED(SPL_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"
);
-
- uclass_find_first_device(UCLASS_CACHE, &dev);
-
- if (dev)
- cache_disable(dev);
+#endif
+#ifdef CONFIG_V5L2_CACHE
+ _cache_disable();
#endif
#endif
+#endif
}
int icache_status(void)
@@ -109,6 +137,7 @@
int ret = 0;
#ifdef CONFIG_RISCV_NDS_CACHE
+#if CONFIG_IS_ENABLED(RISCV_MMODE) || CONFIG_IS_ENABLED(SPL_RISCV_MMODE)
asm volatile (
"csrr t1, mcache_ctl\n\t"
"andi %0, t1, 0x01\n\t"
@@ -117,6 +146,7 @@
: "memory"
);
#endif
+#endif
return ret;
}
@@ -126,6 +156,7 @@
int ret = 0;
#ifdef CONFIG_RISCV_NDS_CACHE
+#if CONFIG_IS_ENABLED(RISCV_MMODE) || CONFIG_IS_ENABLED(SPL_RISCV_MMODE)
asm volatile (
"csrr t1, mcache_ctl\n\t"
"andi %0, t1, 0x02\n\t"
@@ -134,6 +165,7 @@
: "memory"
);
#endif
+#endif
return ret;
}