Add dcache operations invalidate_dcache_range and flush_dcache_range for
cv1800b.
Signed-off-by: Kongyang Liu
---
(no changes since v1)
arch/riscv/cpu/cv1800b/Makefile | 1 +
arch/riscv/cpu/cv1800b/cache.c | 45 +
2 files changed, 46 insertions(+)
create mode 100644 arch/riscv/cpu/cv1800b/cache.c
diff --git a/arch/riscv/cpu/cv1800b/Makefile b/arch/riscv/cpu/cv1800b/Makefile
index da12e0f64e..95beb34b51 100644
--- a/arch/riscv/cpu/cv1800b/Makefile
+++ b/arch/riscv/cpu/cv1800b/Makefile
@@ -4,3 +4,4 @@
obj-y += dram.o
obj-y += cpu.o
+obj-y += cache.o
diff --git a/arch/riscv/cpu/cv1800b/cache.c b/arch/riscv/cpu/cv1800b/cache.c
new file mode 100644
index 00..b8051e29e0
--- /dev/null
+++ b/arch/riscv/cpu/cv1800b/cache.c
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2024, Kongyang Liu
+ */
+
+#include
+
+/*
+ * dcache.ipa rs1 (invalidate)
+ * | 31 - 25 | 24 - 20 | 19 - 15 | 14 - 12 | 11 - 7 | 6 - 0 |
+ * 00101010 rs1 000 0 0001011
+ *
+ * dcache.cpa rs1 (clean)
+ * | 31 - 25 | 24 - 20 | 19 - 15 | 14 - 12 | 11 - 7 | 6 - 0 |
+ * 00101001 rs1 000 0 0001011
+ *
+ * dcache.cipa rs1 (clean then invalidate)
+ * | 31 - 25 | 24 - 20 | 19 - 15 | 14 - 12 | 11 - 7 | 6 - 0 |
+ * 00101011 rs1 000 0 0001011
+ *
+ * sync.s
+ * | 31 - 25 | 24 - 20 | 19 - 15 | 14 - 12 | 11 - 7 | 6 - 0 |
+ * 00011001 0 000 0 0001011
+ */
+#define DCACHE_IPA_A0 ".long 0x02a5000b"
+#define DCACHE_CPA_A0 ".long 0x0295000b"
+#define DCACHE_CIPA_A0 ".long 0x02b5000b"
+
+#define SYNC_S ".long 0x019b"
+
+void invalidate_dcache_range(unsigned long start, unsigned long end)
+{
+ register unsigned long i asm("a0") = start &
~(CONFIG_SYS_CACHELINE_SIZE - 1);
+ for (; i < end; i += CONFIG_SYS_CACHELINE_SIZE)
+ __asm__ __volatile__(DCACHE_IPA_A0);
+ __asm__ __volatile__(SYNC_S);
+}
+
+void flush_dcache_range(unsigned long start, unsigned long end)
+{
+ register unsigned long i asm("a0") = start &
~(CONFIG_SYS_CACHELINE_SIZE - 1);
+ for (; i < end; i += CONFIG_SYS_CACHELINE_SIZE)
+ __asm__ __volatile__(DCACHE_CPA_A0);
+ __asm__ __volatile__(SYNC_S);
+}
--
2.41.0
