X-Git-Url: http://4ch.mooo.com/gitweb/?a=blobdiff_plain;f=src%2Flib%2F16_dbg.c;h=7766a1d443592a49cc64c032d357fa02e1a6584f;hb=fb97121f7d0be4408d8e2ed98a2f7b10b852a915;hp=2215c42002c2acaa5ac9de10655db74ac1efa3a7;hpb=47cdc66151d973d975d0e31fb8a786eb639bebdb;p=16.git diff --git a/src/lib/16_dbg.c b/src/lib/16_dbg.c index 2215c420..7766a1d4 100755 --- a/src/lib/16_dbg.c +++ b/src/lib/16_dbg.c @@ -1,76 +1,76 @@ - -#include "src/16.h" - -// TODO: Could we also provide a build mode to emit debug to the "Bochs E9 hack?" -#ifdef DEBUGSERIAL -# include -# include -# include - -unsigned char _DEBUG_INITed = 0; -struct info_8250 *_DEBUG_uart = NULL; - -int _DEBUG_INIT() { - if (!_DEBUG_INITed) { - unsigned int i; - uint16_t port; - - if (!init_8250()) return 0; - - // what does the BIOS say the serial ports are? - probe_8250_bios_ports(); - for (i=0;i < bios_8250_ports;i++) { - port = get_8250_bios_port(i); - if (port == 0) continue; - probe_8250(port); - } - - // what about the standard serial ports? - for (i=0;i < (sizeof(standard_8250_ports)/sizeof(standard_8250_ports[0]));i++) { - port = standard_8250_ports[i]; - if (port == 0) continue; - probe_8250(port); - } - - // pick the first port, which is probably COM1 - if (base_8250_ports == 0) return 0; // FIXME: You know "base_8250_ports" is probably a bad variable name for the max entries in info_8250_port[] - _DEBUG_uart = &info_8250_port[0]; - _DEBUG_INITed = 1; - - // init the COM port. - // in DOSBox-X, the "log" mode will receive our text and print it into the log file - // on real hardware, our text will likely go over a null modem cable to another PC running a serial terminal program like PuTTY or minicom. - // if nothing is connected, then the bytes go off into the ether to get lost and life goes on. - uart_8250_enable_interrupt(_DEBUG_uart,0); // disable interrupts - uart_8250_set_FIFO(_DEBUG_uart,0x07); // enable FIFO (why not?), also clear xmit/recv FIFO buffers, set threshhold to 1 byte - uart_8250_set_MCR(_DEBUG_uart,3); // RTS and DTS on - uart_8250_set_line_control(_DEBUG_uart,UART_8250_LCR_8BIT | UART_8250_LCR_PARITY); // 8 bit 1 stop bit odd parity - uart_8250_set_baudrate(_DEBUG_uart,uart_8250_baud_to_divisor(_DEBUG_uart,9600)); // 9600 baud - } - - return _DEBUG_INITed; -} - -void _DEBUG(const char *msg) { - if (_DEBUG_uart != NULL) { - char c; - - while ((c=(*msg++)) != 0/*NUL*/) { - while (!uart_8250_can_write(_DEBUG_uart)); // wait for the UART to indicate readiness for our output - uart_8250_write(_DEBUG_uart,(uint8_t)c); // then write it - } - } -} - -static char _DEBUGF_TMP[256]; - -void _DEBUGF(const char *fmt,...) { - va_list va; - - va_start(va,fmt); - vsnprintf(_DEBUGF_TMP,sizeof(_DEBUGF_TMP),fmt,va); - _DEBUG(_DEBUGF_TMP); - va_end(va); -} -#endif - + +#include "src/16.h" + +// TODO: Could we also provide a build mode to emit debug to the "Bochs E9 hack?" +#ifdef DEBUGSERIAL +# include +# include +# include + +unsigned char _DEBUG_INITed = 0; +struct info_8250 *_DEBUG_uart = NULL; + +int _DEBUG_INIT() { + if (!_DEBUG_INITed) { + unsigned int i; + uint16_t port; + + if (!init_8250()) return 0; + + // what does the BIOS say the serial ports are? + probe_8250_bios_ports(); + for (i=0;i < bios_8250_ports;i++) { + port = get_8250_bios_port(i); + if (port == 0) continue; + probe_8250(port); + } + + // what about the standard serial ports? + for (i=0;i < (sizeof(standard_8250_ports)/sizeof(standard_8250_ports[0]));i++) { + port = standard_8250_ports[i]; + if (port == 0) continue; + probe_8250(port); + } + + // pick the first port, which is probably COM1 + if (base_8250_ports == 0) return 0; // FIXME: You know "base_8250_ports" is probably a bad variable name for the max entries in info_8250_port[] + _DEBUG_uart = &info_8250_port[0]; + _DEBUG_INITed = 1; + + // init the COM port. + // in DOSBox-X, the "log" mode will receive our text and print it into the log file + // on real hardware, our text will likely go over a null modem cable to another PC running a serial terminal program like PuTTY or minicom. + // if nothing is connected, then the bytes go off into the ether to get lost and life goes on. + uart_8250_enable_interrupt(_DEBUG_uart,0); // disable interrupts + uart_8250_set_FIFO(_DEBUG_uart,0x07); // enable FIFO (why not?), also clear xmit/recv FIFO buffers, set threshhold to 1 byte + uart_8250_set_MCR(_DEBUG_uart,3); // RTS and DTS on + uart_8250_set_line_control(_DEBUG_uart,UART_8250_LCR_8BIT | UART_8250_LCR_PARITY); // 8 bit 1 stop bit odd parity + uart_8250_set_baudrate(_DEBUG_uart,uart_8250_baud_to_divisor(_DEBUG_uart,9600)); // 9600 baud + } + + return _DEBUG_INITed; +} + +void _DEBUG(const char *msg) { + if (_DEBUG_uart != NULL) { + char c; + + while ((c=(*msg++)) != 0/*NUL*/) { + while (!uart_8250_can_write(_DEBUG_uart)); // wait for the UART to indicate readiness for our output + uart_8250_write(_DEBUG_uart,(uint8_t)c); // then write it + } + } +} + +static char _DEBUGF_TMP[256]; + +void _DEBUGF(const char *fmt,...) { + va_list va; + + va_start(va,fmt); + vsnprintf(_DEBUGF_TMP,sizeof(_DEBUGF_TMP),fmt,va); + _DEBUG(_DEBUGF_TMP); + va_end(va); +} +#endif +