From: Rick Chen rick@andestech.com
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 --- arch/riscv/cpu/ax25/cache.c | 60 ++++++++++++++++++++++++++++++++++----------- 1 file changed, 46 insertions(+), 14 deletions(-)
diff --git a/arch/riscv/cpu/ax25/cache.c b/arch/riscv/cpu/ax25/cache.c index 41de30c..9437e81 100644 --- a/arch/riscv/cpu/ax25/cache.c +++ b/arch/riscv/cpu/ax25/cache.c @@ -11,18 +11,46 @@ #include <asm/csr.h>
#ifdef CONFIG_RISCV_NDS_CACHE +#if defined(CONFIG_RISCV_MMODE) || defined(CONFIG_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 defined(CONFIG_RISCV_MMODE) || defined(CONFIG_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) @@ -39,6 +67,7 @@ void icache_enable(void) { #if !CONFIG_IS_ENABLED(SYS_ICACHE_OFF) #ifdef CONFIG_RISCV_NDS_CACHE +#if defined(CONFIG_RISCV_MMODE) || defined(CONFIG_SPL_RISCV_MMODE) asm volatile ( "csrr t1, mcache_ctl\n\t" "ori t0, t1, 0x1\n\t" @@ -46,12 +75,14 @@ void icache_enable(void) ); #endif #endif +#endif }
void icache_disable(void) { #if !CONFIG_IS_ENABLED(SYS_ICACHE_OFF) #ifdef CONFIG_RISCV_NDS_CACHE +#if defined(CONFIG_RISCV_MMODE) || defined(CONFIG_SPL_RISCV_MMODE) asm volatile ( "fence.i\n\t" "csrr t1, mcache_ctl\n\t" @@ -60,24 +91,23 @@ void icache_disable(void) ); #endif #endif +#endif }
void dcache_enable(void) { #if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF) #ifdef CONFIG_RISCV_NDS_CACHE - struct udevice *dev = NULL; - +#if defined(CONFIG_RISCV_MMODE) || defined(CONFIG_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 } @@ -86,19 +116,17 @@ void dcache_disable(void) { #if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF) #ifdef CONFIG_RISCV_NDS_CACHE - struct udevice *dev = NULL; - +#if defined(CONFIG_RISCV_MMODE) || defined(CONFIG_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 } @@ -108,6 +136,7 @@ int icache_status(void) int ret = 0;
#ifdef CONFIG_RISCV_NDS_CACHE +#if defined(CONFIG_RISCV_MMODE) || defined(CONFIG_SPL_RISCV_MMODE) asm volatile ( "csrr t1, mcache_ctl\n\t" "andi %0, t1, 0x01\n\t" @@ -116,6 +145,7 @@ int icache_status(void) : "memory" ); #endif +#endif
return ret; } @@ -125,6 +155,7 @@ int dcache_status(void) int ret = 0;
#ifdef CONFIG_RISCV_NDS_CACHE +#if defined(CONFIG_RISCV_MMODE) || defined(CONFIG_SPL_RISCV_MMODE) asm volatile ( "csrr t1, mcache_ctl\n\t" "andi %0, t1, 0x02\n\t" @@ -133,6 +164,7 @@ int dcache_status(void) : "memory" ); #endif +#endif
return ret; }