[PATCH v4 2/4] riscv: lib: implement enable_caches for sifive cache
Zong Li
zong.li at sifive.com
Tue Aug 31 11:20:36 CEST 2021
The enable_caches is a generic hook for architecture-implemented, we
define this function to enable composable cache of sifive platforms.
In sifive_cache, it invokes the generic cache_enable interface of cache
uclass to execute the relative implementation in SiFive ccache driver.
Signed-off-by: Zong Li <zong.li at sifive.com>
---
arch/riscv/Kconfig | 5 +++++
arch/riscv/lib/Makefile | 1 +
arch/riscv/lib/sifive_cache.c | 27 +++++++++++++++++++++++++++
common/board_r.c | 4 ++--
4 files changed, 35 insertions(+), 2 deletions(-)
create mode 100644 arch/riscv/lib/sifive_cache.c
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 4b0c3dffa6..ec651fe0a4 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -179,6 +179,11 @@ config SPL_SIFIVE_CLINT
The SiFive CLINT block holds memory-mapped control and status registers
associated with software and timer interrupts.
+config SIFIVE_CACHE
+ bool
+ help
+ This enables the operations to configure SiFive cache
+
config ANDES_PLIC
bool
depends on RISCV_MMODE || SPL_RISCV_MMODE
diff --git a/arch/riscv/lib/Makefile b/arch/riscv/lib/Makefile
index c4cc41434b..06020fcc2a 100644
--- a/arch/riscv/lib/Makefile
+++ b/arch/riscv/lib/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_CMD_BOOTM) += bootm.o
obj-$(CONFIG_CMD_BOOTI) += bootm.o image.o
obj-$(CONFIG_CMD_GO) += boot.o
obj-y += cache.o
+obj-$(CONFIG_SIFIVE_CACHE) += sifive_cache.o
ifeq ($(CONFIG_$(SPL_)RISCV_MMODE),y)
obj-$(CONFIG_$(SPL_)SIFIVE_CLINT) += sifive_clint.o
obj-$(CONFIG_ANDES_PLIC) += andes_plic.o
diff --git a/arch/riscv/lib/sifive_cache.c b/arch/riscv/lib/sifive_cache.c
new file mode 100644
index 0000000000..28154878fc
--- /dev/null
+++ b/arch/riscv/lib/sifive_cache.c
@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2021 SiFive, Inc
+ */
+
+#include <common.h>
+#include <cache.h>
+#include <cpu_func.h>
+#include <dm.h>
+
+void enable_caches(void)
+{
+ struct udevice *dev;
+ int ret;
+
+ /* Enable ways of ccache */
+ ret = uclass_get_device_by_driver(UCLASS_CACHE,
+ DM_DRIVER_GET(sifive_ccache),
+ &dev);
+ if (ret) {
+ log_debug("Cannot enable cache ways");
+ } else {
+ ret = cache_enable(dev);
+ if (ret)
+ log_debug("ccache enable failed");
+ }
+}
diff --git a/common/board_r.c b/common/board_r.c
index e3e6248a1f..630c2451a2 100644
--- a/common/board_r.c
+++ b/common/board_r.c
@@ -114,7 +114,7 @@ static int initr_reloc(void)
return 0;
}
-#ifdef CONFIG_ARM
+#if defined(CONFIG_ARM) || defined(CONFIG_RISCV)
/*
* Some of these functions are needed purely because the functions they
* call return void. If we change them to return 0, these stubs can go away.
@@ -607,7 +607,7 @@ static init_fnc_t init_sequence_r[] = {
initr_trace,
initr_reloc,
/* TODO: could x86/PPC have this also perhaps? */
-#ifdef CONFIG_ARM
+#if defined(CONFIG_ARM) || defined(CONFIG_RISCV)
initr_caches,
/* Note: For Freescale LS2 SoCs, new MMU table is created in DDR.
* A temporary mapping of IFC high region is since removed,
--
2.32.0
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