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c2d7ef51d7
Implement KGDB IO operations for MIPS Fast Debug Channel (FDC). This can be enabled via Kconfig, which also allows the channel number to be chosen. The magic sysrq hack is implemented in the TTY driver, detecting just ^C for the KGDB channel, and ^O followed by a letter for the FDC console channel. The KGDB operations are reasonably efficient thanks to the flush callback, with a 4 byte buffer being used in both directions to allow up to 4 bytes to be encoded per FDC word. Reading of data for KGDB will discard any data received on other channels, which clearly isn't ideal, but given that there is a single FIFO shared between channels we can't do much better. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <jslaby@suse.cz> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: linux-mips@linux-mips.org Cc: kgdb-bugreport@lists.sourceforge.net Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/9147/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> |
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| .. | ||
| hvc | ||
| ipwireless | ||
| serial | ||
| vt | ||
| amiserial.c | ||
| bfin_jtag_comm.c | ||
| cyclades.c | ||
| ehv_bytechan.c | ||
| goldfish.c | ||
| isicom.c | ||
| Kconfig | ||
| Makefile | ||
| metag_da.c | ||
| mips_ejtag_fdc.c | ||
| moxa.c | ||
| moxa.h | ||
| mxser.c | ||
| mxser.h | ||
| n_gsm.c | ||
| n_hdlc.c | ||
| n_r3964.c | ||
| n_tracerouter.c | ||
| n_tracesink.c | ||
| n_tracesink.h | ||
| n_tty.c | ||
| nozomi.c | ||
| pty.c | ||
| rocket_int.h | ||
| rocket.c | ||
| rocket.h | ||
| synclink_gt.c | ||
| synclink.c | ||
| synclinkmp.c | ||
| sysrq.c | ||
| tty_audit.c | ||
| tty_buffer.c | ||
| tty_io.c | ||
| tty_ioctl.c | ||
| tty_ldisc.c | ||
| tty_ldsem.c | ||
| tty_mutex.c | ||
| tty_port.c | ||