HV: refine cmdline code, move parts into dbg_cmd

move the debug related command handle into debug/dbg_cmd.c;
so release build will not include that.

Tracked-On: #2170
Signed-off-by: Minggui Cao <minggui.cao@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

hypervisor/debug/dbg_cmd.c

@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2018 Intel Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <hypervisor.h>
+
+#define MAX_PORT			0x10000  /* port 0 - 64K */
+#define DEFAULT_UART_PORT	0x3F8
+
+#define MAX_CMD_LEN		64
+
+static const char * const cmd_list[] = {
+	"uart=disabled",	/* to disable uart */
+	"uart=port@",		/* like uart=port@0x3F8 */
+	"uart=bdf@",	/*like: uart=bdf@0:18.2, it is for ttyS2 */
+
+	/* format: vuart=ttySx@irqN, like vuart=ttyS1@irq6; better to unify
+	 * uart & vuart & SOS console the same one, and irq same with the native.
+	 * ttySx range (0-3), irqN (0-255)
+	 */
+	"vuart=ttyS",
+};
+
+enum IDX_CMD_DBG {
+	IDX_DISABLE_UART,
+	IDX_PORT_UART,
+	IDX_PCI_UART,
+	IDX_SET_VUART,
+
+	IDX_MAX_CMD,
+};
+
+bool handle_dbg_cmd(const char *cmd, int32_t len)
+{
+	int32_t i;
+	bool handled = false;
+
+	for (i = 0; i < IDX_MAX_CMD; i++) {
+		int32_t tmp = strnlen_s(cmd_list[i], MAX_CMD_LEN);
+
+		/*cmd prefix should be same with one in cmd_list */
+		if (len < tmp)
+			continue;
+
+		if (strncmp(cmd_list[i], cmd, tmp) != 0)
+			continue;
+
+		if (i == IDX_DISABLE_UART) {
+			/* set uart disabled*/
+			uart16550_set_property(false, false, 0UL);
+		} else if (i == IDX_PORT_UART) {
+			uint64_t addr = strtoul_hex(cmd + tmp);
+
+			if (addr > MAX_PORT) {
+				addr = DEFAULT_UART_PORT;
+			}
+
+			uart16550_set_property(true, true, addr);
+
+		} else if (i == IDX_PCI_UART) {
+			uart16550_set_property(true, false, (uint64_t)(cmd+tmp));
+		} else if (i == IDX_SET_VUART) {
+			vuart_set_property(cmd+tmp);
+		}
+	}
+
+	if (i < IDX_MAX_CMD) {
+		handled = true;
+	}
+
+	return handled;
+}