initial import

internal commit: 14ac2bc2299032fa6714d1fefa7cf0987b3e3085

Signed-off-by: Eddie Dong <eddie.dong@intel.com>

hypervisor/debug/console.c

@@ -0,0 +1,236 @@
+/*
+ * Copyright (C) 2018 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in
+ *     the documentation and/or other materials provided with the
+ *     distribution.
+ *   * Neither the name of Intel Corporation nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <hypervisor.h>
+#include <hv_lib.h>
+#include <acrn_common.h>
+#include <hv_arch.h>
+#include <hv_debug.h>
+#include "serial_internal.h"
+
+static spinlock_t lock;
+
+static uint32_t serial_handle = SERIAL_INVALID_HANDLE;
+
+#define CONSOLE_KICK_TIMER_TIMEOUT  40 /* timeout is 40ms*/
+
+uint32_t get_serial_handle(void)
+{
+	return serial_handle;
+}
+
+static int print_char(char x)
+{
+	serial_puts(serial_handle, &x, 1);
+
+	if (x == '\n')
+		serial_puts(serial_handle, "\r", 1);
+
+	return 0;
+}
+
+int console_init(void)
+{
+	spinlock_init(&lock);
+
+	serial_handle = serial_open("STDIO");
+
+	return 0;
+}
+
+int console_putc(int ch)
+{
+	int res = -1;
+
+	spinlock_obtain(&lock);
+
+	if (serial_handle != SERIAL_INVALID_HANDLE)
+		res = print_char(ch);
+
+	spinlock_release(&lock);
+
+	return res;
+}
+
+int console_puts(const char *s)
+{
+	int res = -1;
+	const char *p;
+
+	spinlock_obtain(&lock);
+
+	if (serial_handle != SERIAL_INVALID_HANDLE) {
+		res = 0;
+		while (*s) {
+			/* start output at the beginning of the string search
+			 * for end of string or '\n'
+			 */
+			p = s;
+
+			while (*p && *p != '\n')
+				++p;
+
+			/* write all characters up to p */
+			serial_puts(serial_handle, s, p - s);
+
+			res += p - s;
+
+			if (*p == '\n') {
+				print_char('\n');
+				++p;
+				res += 2;
+			}
+
+			/* continue at position p */
+			s = p;
+		}
+	}
+
+	spinlock_release(&lock);
+
+	return res;
+}
+
+int console_write(const char *s, size_t len)
+{
+	int res = -1;
+	const char *e;
+	const char *p;
+
+	spinlock_obtain(&lock);
+
+	if (serial_handle != SERIAL_INVALID_HANDLE) {
+		/* calculate pointer to the end of the string */
+		e = s + len;
+		res = 0;
+
+		/* process all characters */
+		while (s != e) {
+			/* search for '\n' or the end of the string */
+			p = s;
+
+			while ((p != e) && (*p != '\n'))
+				++p;
+
+			/* write all characters processed so far */
+			serial_puts(serial_handle, s, p - s);
+
+			res += p - s;
+
+			/* write '\n' if end of string is not reached */
+			if (p != e) {
+				print_char('\n');
+				++p;
+				res += 2;
+			}
+
+			/* continue at next position */
+			s = p;
+		}
+	}
+
+	spinlock_release(&lock);
+
+	return res;
+}
+
+void console_dump_bytes(const void *p, unsigned int len)
+{
+
+	const unsigned char *x = p;
+	const unsigned char *e = x + len;
+	int i;
+
+	/* dump all bytes */
+	while (x < e) {
+		/* write the address of the first byte in the row */
+		printf("%08x: ", (vaddr_t) x);
+		/* print one row (16 bytes) as hexadecimal values */
+		for (i = 0; i < 16; i++)
+			printf("%02x ", x[i]);
+
+		/* print one row as ASCII characters (if possible) */
+		for (i = 0; i < 16; i++) {
+			if ((x[i] < ' ') || (x[i] >= 127))
+				console_putc('.');
+			else
+				console_putc(x[i]);
+		}
+		/* continue with next row */
+		console_putc('\n');
+		/* set pointer one row ahead */
+		x += 16;
+	}
+}
+
+static void console_read(void)
+{
+	spinlock_obtain(&lock);
+
+	if (serial_handle != SERIAL_INVALID_HANDLE) {
+		/* Get all the data available in the RX FIFO */
+		serial_get_rx_data(serial_handle);
+	}
+
+	spinlock_release(&lock);
+}
+
+static void console_handler(void)
+{
+	/* Dump the RX FIFO to a circular buffer */
+	console_read();
+
+	/* serial Console Rx operation */
+	vuart_console_rx_chars(serial_handle);
+
+	/* serial Console Tx operation */
+	vuart_console_tx_chars();
+
+	shell_kick_session();
+}
+
+static int console_timer_callback(__unused uint64_t data)
+{
+	/* Kick HV-Shell and Uart-Console tasks */
+	console_handler();
+
+	/* Restart the timer */
+	console_setup_timer();
+
+	return 0;
+}
+
+void console_setup_timer(void)
+{
+	/* Start an one-shot timer */
+	if (add_timer(console_timer_callback, 0,
+		rdtsc() + TIME_MS_DELTA * CONSOLE_KICK_TIMER_TIMEOUT) < 0)
+		pr_err("Failed to add console kick timer");
+}