Changes according to @aykevl's feedback

compileopts/target.go

@@ -276,7 +276,6 @@ func defaultTarget(goos, goarch, triple string) (*TargetSpec, error) {
 		GDB:         "gdb",
 		PortReset:   "false",
 		FlashMethod: "native",
-		CodeModel:   "default",
 	}
 	if goos == "darwin" {
 		spec.LDFlags = append(spec.LDFlags, "-Wl,-dead_strip")

targets/fe310.json

@@ -1,5 +1,5 @@
 {
 	"inherits": ["riscv32"],
 	"features": ["+a", "+c", "+m"],
-	"build-tags": ["fe310", "sifive"]	
+	"build-tags": ["fe310", "sifive"]
 }

targets/maixbit.ld

@@ -1,7 +1,7 @@
 
 MEMORY
 {
-    RAM (xrw) : ORIGIN = 0x80000000, LENGTH = (6 * 1024 * 1024)
+    RAM (xrw) : ORIGIN = 0x80000000, LENGTH = 6M
 }
 
 REGION_ALIAS("FLASH_TEXT", RAM);

targets/riscv.json

@@ -0,0 +1,24 @@
+{
+	"goos": "linux",
+	"goarch": "arm",
+	"build-tags": ["tinygo.riscv", "baremetal", "linux", "arm"],
+	"gc": "conservative",
+	"compiler": "clang",
+	"linker": "ld.lld",
+	"rtlib": "compiler-rt",
+	"libc": "picolibc",
+	"cflags": [
+		"-Os",
+		"-Werror",
+		"-fno-exceptions", "-fno-unwind-tables",
+		"-ffunction-sections", "-fdata-sections"
+	],
+	"ldflags": [
+		"--gc-sections"
+	],
+	"extra-files": [
+		"src/device/riscv/start.S",
+		"src/runtime/scheduler_tinygoriscv.S"
+	],
+	"gdb": "riscv64-unknown-elf-gdb"
+}