Add new kendryte k210 target definition

targets/fe310.json

@@ -1,5 +1,19 @@
 {
 	"inherits": ["riscv32"],
 	"features": ["+a", "+c", "+m"],
-	"build-tags": ["fe310", "sifive"]
+	"build-tags": ["fe310", "sifive"],
+	"llvm-target": "riscv32--none",
+	"cflags": [
+		"--target=riscv32--none",
+		"-march=rv32imac",
+		"-mabi=ilp32",
+		"-Os",
+		"-Werror",
+		"-fno-exceptions", "-fno-unwind-tables",
+		"-ffunction-sections", "-fdata-sections"
+	],
+	"ldflags": [
+		"-melf32lriscv",
+		"--gc-sections"
+	]
 }

targets/k210.json

@@ -0,0 +1,19 @@
+{
+	"inherits": ["riscv"],
+	"features": ["+a", "+c", "+m", "+f", "+d"],
+	"build-tags": ["k210", "kendryte"],
+	"llvm-target": "riscv64--none",
+	"cflags": [
+		"--target=riscv64--none",
+		"-march=rv64gc",
+		"-mabi=lp64d",
+		"-Os",
+		"-Werror",
+		"-fno-exceptions", "-fno-unwind-tables",
+		"-ffunction-sections", "-fdata-sections"
+	],
+	"ldflags": [
+		"-melf64lriscv",
+		"--gc-sections"
+	]
+}

targets/maix-bit-mic.json

@@ -0,0 +1,6 @@
+{
+	"inherits": ["k210"],
+	"build-tags": ["maix-bit-mic"],
+	"linkerscript": "targets/maix-bit-mic.ld",
+	"flash-command": "kflash -p /dev/ttyUSB0 {hex}"
+}

targets/maix-bit-mic.ld

@@ -0,0 +1,10 @@
+
+MEMORY
+{
+    FLASH_TEXT (rw) : ORIGIN = 0x80000000, LENGTH = (6 * 1024 * 1024)
+    RAM (xrw)       : ORIGIN = 0x80000000, LENGTH = (6 * 1024 * 1024)
+}
+
+_stack_size = 2K;
+
+INCLUDE "targets/riscv.ld"