riscv: Rename Andes cpu and board names

The current ae350-related defconfigs could also
support newer Andes CPU IP, so modify the names of CPU
from ax25 to andesv5, and board name from ax25-ae350 to ae350.

Signed-off-by: Leo Yu-Chi Liang <ycliang@andestech.com>
Reviewed-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Rick Chen <rick@andestech.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/arch/riscv/cpu/andesv5/cpu.c b/arch/riscv/cpu/andesv5/cpu.c
new file mode 100644
index 0000000000..06e379bcb1
--- /dev/null
+++ b/arch/riscv/cpu/andesv5/cpu.c
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Andes Technology Corporation
+ * Rick Chen, Andes Technology Corporation <rick@andestech.com>
+ */
+
+/* CPU specific code */
+#include <common.h>
+#include <cpu_func.h>
+#include <irq_func.h>
+#include <asm/cache.h>
+#include <asm/csr.h>
+#include <asm/arch-andes/csr.h>
+
+/*
+ * cleanup_before_linux() is called just before we call linux
+ * it prepares the processor for linux
+ *
+ * we disable interrupt and caches.
+ */
+int cleanup_before_linux(void)
+{
+	disable_interrupts();
+
+	cache_flush();
+
+	return 0;
+}
+
+void harts_early_init(void)
+{
+	/* Enable I/D-cache in SPL */
+	if (CONFIG_IS_ENABLED(RISCV_MMODE)) {
+		unsigned long mcache_ctl_val = csr_read(CSR_MCACHE_CTL);
+
+		mcache_ctl_val |= (MCACHE_CTL_DC_COHEN | MCACHE_CTL_IC_EN |
+				   MCACHE_CTL_DC_EN | MCACHE_CTL_CCTL_SUEN);
+
+		csr_write(CSR_MCACHE_CTL, mcache_ctl_val);
+
+		/*
+		 * Check mcache_ctl.DC_COHEN, we assume this platform does
+		 * not support CM if the bit is hard-wired to 0.
+		 */
+		if (csr_read(CSR_MCACHE_CTL) & MCACHE_CTL_DC_COHEN) {
+			/* Wait for DC_COHSTA bit to be set */
+			while (!(csr_read(CSR_MCACHE_CTL) & MCACHE_CTL_DC_COHSTA));
+		}
+	}
+}