9 files changed, 129 insertions, 42 deletions
diff --git a/arch/riscv/cpu/Makefile b/arch/riscv/cpu/Makefile
new file mode 100644
index 0000000000..2cc6757fcf
--- /dev/null
+++ b/arch/riscv/cpu/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
+
+extra-y = start.o
+
+obj-y += cpu.o
diff --git a/arch/riscv/cpu/ax25/Makefile b/arch/riscv/cpu/ax25/Makefile
index c3f164c122..2ab0342fe8 100644
--- a/arch/riscv/cpu/ax25/Makefile
+++ b/arch/riscv/cpu/ax25/Makefile
@@ -3,6 +3,4 @@
 # Copyright (C) 2017 Andes Technology Corporation
 # Rick Chen, Andes Technology Corporation <rick@andestech.com>
 
-extra-y	= start.o
-
 obj-y	:= cpu.o
diff --git a/arch/riscv/cpu/ax25/cpu.c b/arch/riscv/cpu/ax25/cpu.c
index ab05b57d4f..fddcc156c3 100644
--- a/arch/riscv/cpu/ax25/cpu.c
+++ b/arch/riscv/cpu/ax25/cpu.c
@@ -6,9 +6,6 @@
 
 /* CPU specific code */
 #include <common.h>
-#include <command.h>
-#include <watchdog.h>
-#include <asm/cache.h>
 
 /*
  * cleanup_before_linux() is called just before we call linux
@@ -24,9 +21,3 @@ int cleanup_before_linux(void)
 
 	return 0;
 }
-
-int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
-{
-	disable_interrupts();
-	panic("ax25-ae350 wdt not support yet.\n");
-}
diff --git a/arch/riscv/cpu/cpu.c b/arch/riscv/cpu/cpu.c
new file mode 100644
index 0000000000..ae57fb8313
--- /dev/null
+++ b/arch/riscv/cpu/cpu.c
@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
+ */
+
+#include <common.h>
+#include <asm/csr.h>
+
+enum {
+	ISA_INVALID = 0,
+	ISA_32BIT,
+	ISA_64BIT,
+	ISA_128BIT
+};
+
+static const char * const isa_bits[] = {
+	[ISA_INVALID] = NULL,
+	[ISA_32BIT]   = "32",
+	[ISA_64BIT]   = "64",
+	[ISA_128BIT]  = "128"
+};
+
+static inline bool supports_extension(char ext)
+{
+	return csr_read(misa) & (1 << (ext - 'a'));
+}
+
+int print_cpuinfo(void)
+{
+	char name[32];
+	char *s = name;
+	int bit;
+
+	s += sprintf(name, "rv");
+	bit = csr_read(misa) >> (sizeof(long) * 8 - 2);
+	s += sprintf(s, isa_bits[bit]);
+
+	supports_extension('i') ? *s++ = 'i' : 'r';
+	supports_extension('m') ? *s++ = 'm' : 'i';
+	supports_extension('a') ? *s++ = 'a' : 's';
+	supports_extension('f') ? *s++ = 'f' : 'c';
+	supports_extension('d') ? *s++ = 'd' : '-';
+	supports_extension('c') ? *s++ = 'c' : 'v';
+	*s++ = '\0';
+
+	printf("CPU:   %s\n", name);
+
+	return 0;
+}
diff --git a/arch/riscv/cpu/qemu/Makefile b/arch/riscv/cpu/qemu/Makefile
new file mode 100644
index 0000000000..258e4620dd
--- /dev/null
+++ b/arch/riscv/cpu/qemu/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
+
+obj-y += dram.o
+obj-y += cpu.o
diff --git a/arch/riscv/cpu/qemu/cpu.c b/arch/riscv/cpu/qemu/cpu.c
new file mode 100644
index 0000000000..6c7a32755a
--- /dev/null
+++ b/arch/riscv/cpu/qemu/cpu.c
@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
+ */
+
+#include <common.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();
+
+	/* turn off I/D-cache */
+
+	return 0;
+}
diff --git a/arch/riscv/cpu/qemu/dram.c b/arch/riscv/cpu/qemu/dram.c
new file mode 100644
index 0000000000..84d87d2a7f
--- /dev/null
+++ b/arch/riscv/cpu/qemu/dram.c
@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
+ */
+
+#include <common.h>
+#include <fdtdec.h>
+
+int dram_init(void)
+{
+	return fdtdec_setup_mem_size_base();
+}
+
+int dram_init_banksize(void)
+{
+	return fdtdec_setup_memory_banksize();
+}
diff --git a/arch/riscv/cpu/ax25/start.S b/arch/riscv/cpu/start.S
index 7cd7755190..7cd7755190 100644
--- a/arch/riscv/cpu/ax25/start.S
+++ b/arch/riscv/cpu/start.S
diff --git a/arch/riscv/cpu/ax25/u-boot.lds b/arch/riscv/cpu/u-boot.lds
index c50b9642f1..11bc4a738b 100644
--- a/arch/riscv/cpu/ax25/u-boot.lds
+++ b/arch/riscv/cpu/u-boot.lds
@@ -3,28 +3,27 @@
  * Copyright (C) 2017 Andes Technology Corporation
  * Rick Chen, Andes Technology Corporation <rick@andestech.com>
  */
+
 OUTPUT_ARCH("riscv")
 ENTRY(_start)
 
 SECTIONS
 {
 	. = ALIGN(4);
-	.text :
-	{
-		arch/riscv/cpu/ax25/start.o	(.text)
+	.text : {
+		arch/riscv/cpu/start.o	(.text)
 	}
 
 	/* This needs to come before *(.text*) */
 	.efi_runtime : {
-                __efi_runtime_start = .;
+		__efi_runtime_start = .;
 		*(.text.efi_runtime*)
 		*(.rodata.efi_runtime*)
 		*(.data.efi_runtime*)
-                __efi_runtime_stop = .;
+		__efi_runtime_stop = .;
 	}
 
-	.text_rest :
-	{
+	.text_rest : {
 		*(.text*)
 	}
 
@@ -39,10 +38,10 @@ SECTIONS
 	. = ALIGN(4);
 
 	.got : {
-	   __got_start = .;
-	   *(.got.plt) *(.got)
-	   __got_end = .;
-    }
+		__got_start = .;
+		*(.got.plt) *(.got)
+		__got_end = .;
+	}
 
 	. = ALIGN(4);
 
@@ -50,41 +49,40 @@ SECTIONS
 		KEEP(*(SORT(.u_boot_list*)));
 	}
 
-    . = ALIGN(4);
+	. = ALIGN(4);
 
 	.efi_runtime_rel : {
-                __efi_runtime_rel_start = .;
+		__efi_runtime_rel_start = .;
 		*(.rel*.efi_runtime)
 		*(.rel*.efi_runtime.*)
-                __efi_runtime_rel_stop = .;
+		__efi_runtime_rel_stop = .;
 	}
 
-    . = ALIGN(4);
+	. = ALIGN(4);
 
-    /DISCARD/ : { *(.rela.plt*) }
-    .rela.dyn : {
-        __rel_dyn_start = .;
-        *(.rela*)
-        __rel_dyn_end = .;
-    }
+	/DISCARD/ : { *(.rela.plt*) }
+	.rela.dyn : {
+		__rel_dyn_start = .;
+		*(.rela*)
+		__rel_dyn_end = .;
+	}
 
-    . = ALIGN(4);
+	. = ALIGN(4);
 
-    .dynsym : {
-        __dyn_sym_start = .;
-        *(.dynsym)
-        __dyn_sym_end = .;
-    }
+	.dynsym : {
+		__dyn_sym_start = .;
+		*(.dynsym)
+		__dyn_sym_end = .;
+	}
 
-    . = ALIGN(4);
+	. = ALIGN(4);
 
 	_end = .;
 
 	.bss : {
-        __bss_start = .;
-        *(.bss*)
+		__bss_start = .;
+		*(.bss*)
 		. = ALIGN(4);
 		__bss_end = .;
 	}
-
 }