sim: add uart dma mode & use work instead of loop.

Signed-off-by: ligd <[email protected]>

Author: GUIDINGLI

arch/Kconfig

@@ -106,6 +106,7 @@ config ARCH_SIM
 	select ONESHOT
 	select SERIAL_CONSOLE
 	select SERIAL_IFLOWCONTROL
+	select SCHED_HPWORK
 	---help---
 		Linux/Cygwin user-mode simulation.
 

arch/sim/Kconfig

@@ -504,6 +504,14 @@ endif
 
 menu "Simulated UART"
 
+config SIM_UART_DMA
+	bool "SIM UART use DMA mode"
+	default y
+	select SERIAL_TXDMA
+	select SERIAL_RXDMA
+	---help---
+		console use DMA mode or single char mode
+
 config SIM_UART_NUMBER
 	int "Number of simulated UART ports"
 	default 0

arch/sim/src/sim/posix/sim_hostuart.c

@@ -131,25 +131,37 @@ void host_uart_close(int fd)
 }
 
 /****************************************************************************
- * Name: host_uart_putc
+ * Name: host_uart_puts
  ****************************************************************************/
 
-int host_uart_putc(int fd, int ch)
+ssize_t host_uart_puts(int fd, const char *buf, size_t size)
 {
-  return write(fd, &ch, 1) == 1 ? ch : -1;
+  ssize_t ret;
+
+  do
+    {
+      ret = write(fd, buf, size);
+    }
+  while (ret < 0 && errno == EINTR);
+
+  return ret < 0 ? -errno : ret;
 }
 
 /****************************************************************************
- * Name: host_uart_getc
+ * Name: host_uart_gets
  ****************************************************************************/
 
-int host_uart_getc(int fd)
+ssize_t host_uart_gets(int fd, char *buf, size_t size)
 {
-  int ret;
-  unsigned char ch;
+  ssize_t ret;
+
+  do
+    {
+      ret = read(fd, buf, size);
+    }
+  while (ret < 0 && errno == EINTR);
 
-  ret = read(fd, &ch, 1);
-  return ret < 0 ? ret : ch;
+  return ret < 0 ? -errno : ret;
 }
 
 /****************************************************************************

arch/sim/src/sim/sim_initialize.c

@@ -166,10 +166,6 @@ static int sim_loop_task(int argc, char **argv)
 
       sched_lock();
 
-      /* Handle UART data availability */
-
-      sim_uartloop();
-
 #if defined(CONFIG_SIM_TOUCHSCREEN) || defined(CONFIG_SIM_AJOYSTICK) || \
     defined(CONFIG_SIM_BUTTONS)
       /* Drive the X11 event loop */

arch/sim/src/sim/sim_internal.h

@@ -209,19 +209,18 @@ void sim_timer_update(void);
 /* sim_uart.c ***************************************************************/
 
 void sim_uartinit(void);
-void sim_uartloop(void);
 
 /* sim_hostuart.c ***********************************************************/
 
-void host_uart_start(void);
-int  host_uart_open(const char *pathname);
-void host_uart_close(int fd);
-int  host_uart_putc(int fd, int ch);
-int  host_uart_getc(int fd);
-bool host_uart_checkin(int fd);
-bool host_uart_checkout(int fd);
-int  host_uart_setcflag(int fd, unsigned int cflag);
-int  host_uart_getcflag(int fd, unsigned int *cflag);
+void    host_uart_start(void);
+int     host_uart_open(const char *pathname);
+void    host_uart_close(int fd);
+ssize_t host_uart_puts(int fd, const char *buf, size_t size);
+ssize_t host_uart_gets(int fd, char *buf, size_t size);
+bool    host_uart_checkin(int fd);
+bool    host_uart_checkout(int fd);
+int     host_uart_setcflag(int fd, unsigned int cflag);
+int     host_uart_getcflag(int fd, unsigned int *cflag);
 
 /* sim_deviceimage.c ********************************************************/