Kyösti Mälkki (kyosti.malkki@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/5343
-gerrit
commit 540116c3c519fb260f292d9f108ab616089b1062 Author: Kyösti Mälkki kyosti.malkki@gmail.com Date: Fri Apr 4 15:05:28 2014 +0300
console: Add console for GDB
Connection of UARTs to GDB stub got lost in the console transition process, bring it back. In theory, GDB stub should work also over usbdebug, but that solution is not really tested at all yet.
Change-Id: I90e05e8132889e788b92e055ee191f35add43bbc Signed-off-by: Kyösti Mälkki kyosti.malkki@gmail.com --- src/arch/x86/lib/c_start.S | 1 + src/arch/x86/lib/exception.c | 13 +++++++++++-- src/console/console.c | 24 ++++++++++++++++++++++++ src/include/console/streams.h | 6 ++++++ src/include/console/uart.h | 8 ++++++++ src/include/console/usb.h | 16 ++++++++++++++-- 6 files changed, 64 insertions(+), 4 deletions(-)
diff --git a/src/arch/x86/lib/c_start.S b/src/arch/x86/lib/c_start.S index faea22d..675a09c 100644 --- a/src/arch/x86/lib/c_start.S +++ b/src/arch/x86/lib/c_start.S @@ -86,6 +86,7 @@ _start: post_code(POST_PRE_HARDWAREMAIN) /* post fe */
#if CONFIG_GDB_WAIT + call gdb_hw_init call gdb_stub_breakpoint #endif call main diff --git a/src/arch/x86/lib/exception.c b/src/arch/x86/lib/exception.c index 9756949..f64b2e7 100644 --- a/src/arch/x86/lib/exception.c +++ b/src/arch/x86/lib/exception.c @@ -1,4 +1,5 @@ #include <console/console.h> +#include <console/streams.h> #include <string.h>
#if CONFIG_GDB_STUB @@ -217,12 +218,17 @@ static char out_buffer[BUFMAX];
static inline void stub_putc(int ch) { - console_tx_byte(ch); + gdb_tx_byte(ch); +} + +static inline void stub_flush(void) +{ + gdb_tx_flush(); }
static inline int stub_getc(void) { - return console_rx_byte(); + return gdb_rx_byte(); }
static int hex(char ch) @@ -322,9 +328,11 @@ static int get_packet(char *buffer)
if (checksum != xmitcsum) { stub_putc('-'); /* failed checksum */ + stub_flush(); } else { stub_putc('+'); /* successful transfer */ + stub_flush(); } } } while(checksum != xmitcsum); @@ -353,6 +361,7 @@ static void put_packet(char *buffer) stub_putc('#'); stub_putc(hexchars[checksum >> 4]); stub_putc(hexchars[checksum % 16]); + stub_flush();
} while ((stub_getc() & 0x7f) != '+');
diff --git a/src/console/console.c b/src/console/console.c index 9b1c255..bd03144 100644 --- a/src/console/console.c +++ b/src/console/console.c @@ -17,6 +17,7 @@ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
+#include <rules.h> #include <console/streams.h> #include <console/cbmem_console.h> #include <console/uart.h> @@ -53,3 +54,26 @@ void console_tx_flush(void) __ne2k_tx_flush(); __usb_tx_flush(); } + + +#if CONFIG_GDB_STUB && (ENV_ROMSTAGE || ENV_RAMSTAGE) +void gdb_hw_init(void) +{ + __gdb_hw_init(); +} + +void gdb_tx_byte(unsigned char byte) +{ + __gdb_tx_byte(byte); +} + +void gdb_tx_flush(void) +{ + __gdb_tx_flush(); +} + +unsigned char gdb_rx_byte(void) +{ + return __gdb_rx_byte(); +} +#endif diff --git a/src/include/console/streams.h b/src/include/console/streams.h index 9d4d3fc..fb168da 100644 --- a/src/include/console/streams.h +++ b/src/include/console/streams.h @@ -22,6 +22,12 @@ void console_hw_init(void); void console_tx_byte(unsigned char byte); void console_tx_flush(void);
+/* For remote GDB debugging. */ +void gdb_hw_init(void); +void gdb_tx_byte(unsigned char byte); +void gdb_tx_flush(void); +unsigned char gdb_rx_byte(void); + /* Helpers for ROMCC console. */ void console_tx_nibble(unsigned nibble); void console_tx_hex8(unsigned char value); diff --git a/src/include/console/uart.h b/src/include/console/uart.h index b08cd9b..d4020c3 100644 --- a/src/include/console/uart.h +++ b/src/include/console/uart.h @@ -69,6 +69,14 @@ static inline void __uart_tx_byte(u8 data) {} static inline void __uart_tx_flush(void) {} #endif
+#if CONFIG_GDB_STUB && (ENV_ROMSTAGE || ENV_RAMSTAGE) +#define CONFIG_UART_FOR_GDB CONFIG_UART_FOR_CONSOLE +static inline void __gdb_hw_init(void) { uart_init(CONFIG_UART_FOR_GDB); } +static inline void __gdb_tx_byte(u8 data) { uart_tx_byte(CONFIG_UART_FOR_GDB, data); } +static inline void __gdb_tx_flush(void) { uart_tx_flush(CONFIG_UART_FOR_GDB); } +static inline u8 __gdb_rx_byte(void) { return uart_rx_byte(CONFIG_UART_FOR_GDB); } +#endif + #endif /* __ROMCC__ */
#endif /* CONSOLE_UART_H */ diff --git a/src/include/console/usb.h b/src/include/console/usb.h index 57ea4eb..b5aab66 100644 --- a/src/include/console/usb.h +++ b/src/include/console/usb.h @@ -34,14 +34,26 @@ int usb_can_rx_byte(int idx); #define __CONSOLE_USB_ENABLE__ CONFIG_CONSOLE_USB && \ ((ENV_ROMSTAGE && CONFIG_USBDEBUG_IN_ROMSTAGE) || ENV_RAMSTAGE)
+#define USB_PIPE_FOR_CONSOLE 0 +#define USB_PIPE_FOR_GDB 0 + #if __CONSOLE_USB_ENABLE__ static inline void __usbdebug_init(void) { usbdebug_init(); } -static inline void __usb_tx_byte(u8 data) { usb_tx_byte(0, data); } -static inline void __usb_tx_flush(void) { usb_tx_flush(0); } +static inline void __usb_tx_byte(u8 data) { usb_tx_byte(USB_PIPE_FOR_CONSOLE, data); } +static inline void __usb_tx_flush(void) { usb_tx_flush(USB_PIPE_FOR_CONSOLE); } #else static inline void __usbdebug_init(void) {} static inline void __usb_tx_byte(u8 data) {} static inline void __usb_tx_flush(void) {} #endif
+/* */ +#if 0 && CONFIG_GDB_STUB && \ + ((ENV_ROMSTAGE && CONFIG_USBDEBUG_IN_ROMSTAGE) || ENV_RAMSTAGE) +static inline void __gdb_hw_init(void) { usbdebug_init(); } +static inline void __gdb_tx_byte(u8 data) { usb_tx_byte(USB_PIPE_FOR_GDB, data); } +static inline void __gdb_tx_flush(void) { usb_tx_flush(USB_PIPE_FOR_GDB); } +static inline u8 __gdb_rx_byte(void) { return usb_rx_byte(USB_PIPE_FOR_GDB); } +#endif + #endif /* _CONSOLE_USB_H_ */