ast@cs.vu.nl (Andy Tanenbaum) (09/28/88)
: This is a shar archive. Extract with sh, not csh. : This archive ends with exit, so do not worry about trailing junk. : --------------------------- cut here -------------------------- PATH=/bin:/usr/bin:/usr/ucb echo Extracting 'rs232.c.new' sed 's/^X//' > 'rs232.c.new' << '+ END-OF-FILE ''rs232.c.new' X/* Now begins the code and data for the device RS232 drivers. */ X X#include "../h/const.h" X#include "../h/type.h" X#include "../h/callnr.h" X#include "../h/com.h" X#include "../h/error.h" X#include "../h/sgtty.h" X#include "../h/signal.h" X#include "const.h" X#include "type.h" X#include "glo.h" X#include "proc.h" X#include "tty.h" X X/* Definitions used by the RS232 driver. */ X#define RS_BUF_SIZE 256 /* output buffer per serial line */ X#define PRIMARY 0x3F8 /* I/O port of primary RS232 */ X#define SECONDARY 0x2F8 /* I/O port of secondary RS232 */ X#define SPARE 16 /* leave room in buffer for echoes */ X#define THRESHOLD 20 /* # chars to accumulate before msg */ X X/* Constants relating to the 8250. */ X#define RS232_RATE_DIVISOR 0 /* address of baud rate divisor reg */ X#define RS232_TRANSMIT_HOLDING 0 /* address of transmitter holding reg*/ X#define RS232_RECEIVER_DATA_REG 0 /* address of receiver data register */ X#define RS232_INTERRUPTS 1 /* address of interrupt enable reg */ X#define RS232_INTERRUPT_ID_REG 2 /* address of interrupt id register */ X#define RS232_LINE_CONTROL 3 /* address of line control register */ X#define RS232_MODEM_CONTROL 4 /* address of modem control register */ X#define RS232_LINE_STATUS 5 /* address of line status register */ X#define RS232_MODEM_STATUS 6 /* address of modem status register */ X#define LINE_CONTROLS 0x0B /* odd parity,1 stop bit,8 data bits */ X#define MODEM_CONTROLS 0x0B /* RTS & DTR */ X#define ADDRESS_DIVISOR 0x80 /* value to address divisor */ X#define HOLDING_REG_EMPTY 0x20 /* transmitter holding reg empty */ X#define RS232_INTERRUPT_CLASSES 0x03 /* receiver Data Ready & xmt empty */ X#define UART_FREQ 115200L /* UART timer frequency */ X#define DEF_BAUD 1200 /* default baud rate */ X X/* Line control setting related constants. */ X#define ODD 0 X#define EVEN 1 X#define NONE -1 X#define PARITY_ON_OFF 0x08 /* position of parity bit in line reg*/ X#define PARITY_TYPE_SHIFT 4 /* shift count for parity_type bit */ X#define STOP_BITS_SHIFT 2 /* shift count for # stop_bits */ X#define DATA_LEN 8 /* how much to shift sg_mode for len */ X X/* RS232 interrupt types. */ X#define MODEM_STATUS 0x00 /* UART modem status change */ X#define TRANSMITTER_READY 0x02 /* transmitter ready to accept data */ X#define RECEIVER_READY 0x04 /* data received interrupt */ X#define LINE_STATUS 0x06 /* UART line status change */ X#define INT_TYPE_MASK 0x06 /* mask to mask out interrupt type */ X#define INT_PENDING 0x01 /* position of interrupt-pending bit */ X X/* Status register values. */ X#define DATA_REGISTER_EMPTY 0x20 /* mask to see if data reg is empty */ X#define DATA_RECEIVED 0x01 /* mask to see if data has arrived */ X X/* Global variables used by the RS232 driver. */ XPUBLIC message rs232_rd_mess; /* used when chars arrive from tty */ XPUBLIC message rs232_wt_mess; /* used when output to tty done */ XPUBLIC int flush_flag; /* indicates chars in tty_driver_buf */ XPRIVATE int first_rs_write_int_seen = FALSE; X XPRIVATE struct rs_struct{ X int rs_base; /* 0x3F8 for primary, 0x2F8 secondary*/ X int rs_busy; /* line is idle or not */ X int rs_left; /* # chars left in buffer to output */ X char *rs_next; /* pointer to next char to output */ X char rs_buf[RS_BUF_SIZE]; /* output buffer */ X} rs_struct[NR_RS_LINES]; X X X/*===========================================================================* X * rs232 * X *===========================================================================*/ XPUBLIC rs232(unit) Xint unit; /* which unit caused the interrupt */ X{ X/* When an RS232 interrupt occurs, mpx88.s catches it and calls rs232(). X * Because more than one interrupt condition can occur at the same X * time, the conditions are presented in the interrupt-identification X * register in priority order, we have to keep scanning until the X * interrupt-pending bit goes down. Only one communications port is really X * supported here because the other vector is used by the Ethernet. X */ X X int interrupt_type, t, old_state, val; X struct rs_struct *rs; X X old_state = lock(); X rs = &rs_struct[unit - NR_CONS]; X while (TRUE) { X port_in(rs->rs_base + RS232_INTERRUPT_ID_REG, &interrupt_type); X if ((interrupt_type & INT_PENDING) == 1) break; /* 1 = no interrupt */ X t = interrupt_type & INT_TYPE_MASK; X switch(t) { X case RECEIVER_READY: /* a character has arrived */ X rs_read_int(unit); X break; X X case TRANSMITTER_READY: /* a character has been output */ X rs_write_int(unit); X break; X X case LINE_STATUS: /* line status event, (disabled) */ X port_in(rs_struct[unit-1].rs_base + RS232_LINE_STATUS, &val); X printf("RS 232 line status event %x\n", val); X break; X X case MODEM_STATUS: /* modem status event, (disabled) */ X port_in(rs_struct[unit-1].rs_base + RS232_MODEM_STATUS, &val); X printf("RS 232 modem status event %x\n", val); X break; X } X } X restore(old_state); X} X X X/*===========================================================================* X * rs_read_int * X *===========================================================================*/ XPRIVATE rs_read_int(line) Xint line; X{ X int val, k, base; X X base = rs_struct[line - NR_CONS].rs_base; X X /* Fetch the character from the RS232 hardware. */ X port_in(base + RS232_RECEIVER_DATA_REG, &val); X X /* Store the character in memory so the task can get at it later */ X if ((k = tty_driver_buf[0]) < tty_driver_buf[1]) { X /* There is room to store this character, do it */ X k = k + k; /* each entry contains two bytes */ X tty_driver_buf[k + 2] = val; /* store the ascii code */ X tty_driver_buf[k + 3] = line; /* tell wich line it came from */ X tty_driver_buf[0]++; /* increment counter */ X X if (tty_driver_buf[0] < THRESHOLD) { X /* Don't send message. Just accumulate. Let clock do it. */ X port_out(INT_CTL, ENABLE); X flush_flag++; X return; X } X rs_flush(); /* send TTY task a message */ X } else { X /* Too many character have been buffered. Discard excess */ X port_out(INT_CTL, ENABLE); /* re-enable 8259A controller */ X } X} X X X/*===========================================================================* X * rs_flush * X *===========================================================================*/ XPUBLIC rs_flush() X{ X/* Flush the tty_driver_buf by sending a message to TTY. This procedure can X * be triggered locally, when a character arrives, or by the clock task. X */ X X /* Build and send the interrupt message */ X flush_flag = 0; X if (tty_driver_buf[0] == 0) return; /* nothing to flush */ X rs232_rd_mess.m_type = TTY_CHAR_INT; X rs232_rd_mess.ADDRESS = tty_driver_buf; X interrupt(TTY, &rs232_rd_mess); /* send a message to the tty task */ X} X X X/*===========================================================================* X * rs_write_int * X *===========================================================================*/ XPRIVATE rs_write_int(line) Xint line; X{ X/* An output ready interrupt has occurred, or a write has been done to an idle X * line. In both cases, start the output. X */ X X int val; X struct tty_struct *tp; X struct rs_struct *rs; X X if (first_rs_write_int_seen == FALSE) { X first_rs_write_int_seen = TRUE; X port_out(INT_CTL, ENABLE); /* re-enable 8259A controller */ X return; X } X X /* On the XT and clones, check for spurious write-completed interrupts. */ X rs = &rs_struct[line - NR_CONS]; X port_in(rs->rs_base + RS232_LINE_STATUS, &val); X if ( (val & HOLDING_REG_EMPTY) == 0) { X port_out(INT_CTL, ENABLE); /* re-enable 8259A controller */ X return; X } X X /* If there are more characters in rs_buf, output the next one. */ X if (rs->rs_left > 0) { X rs_feed(rs); /* output the next char in rs_buf */ X port_out(INT_CTL, ENABLE); /* re-enable 8259A controller */ X return; X } X X /* The current rs_buf is finished. See if the complete user buf is done. */ X tp = &tty_struct[line]; X rs->rs_busy = FALSE; X rs->rs_next = &rs->rs_buf[0]; X if (tp->tty_outleft > 0) { X serial_out(tp); /* copy the next chunk to rs_buf */ X port_out(INT_CTL, ENABLE); /* re-enable 8259A controller */ X return; X } X X /* The current output buffer is finished. Send a message to the tty task. */ X if (tp->tty_waiting == WAITING) { X rs232_wt_mess.m_type = TTY_O_DONE; /* build the message */ X rs232_wt_mess.ADDRESS = tty_driver_buf; /* pro forma */ X rs232_wt_mess.TTY_LINE = line; /* which line is finished */ X tp->tty_waiting = COMPLETED; /* mark this line as done */ X output_done++; /* # of RS232 lines now completed */ X interrupt(TTY, &rs232_wt_mess); /* send the message to the tty task */ X } else { X port_out(INT_CTL, ENABLE); /* re-enable 8259A controller */ X } X} X X X/*===========================================================================* X * rs_feed * X *===========================================================================*/ XPRIVATE rs_feed(rs) Xstruct rs_struct *rs; /* which line */ X{ X/* If there is more output queued, output the next character. */ X X char byte; X X if (rs->rs_left > 0) { X byte = *rs->rs_next; X port_out(rs->rs_base + RS232_TRANSMIT_HOLDING, (int) byte); X rs->rs_next++; X rs->rs_left--; /* one char done */ X } X} X X X/*===========================================================================* X * start_rs232 * X *===========================================================================*/ XPRIVATE start_rs232(tp) Xstruct tty_struct *tp; /* which tty */ X{ X int old_state; X X old_state = lock(); X serial_out(tp); X restore(old_state); X} X X X/*===========================================================================* X * serial_out * X *===========================================================================*/ XPRIVATE serial_out(tp) Xregister struct tty_struct *tp; /* tells which terminal is to be used */ X{ X/* Copy as much data as possible to the output queue, then start I/O if X * necessary. X */ X int bytes, line; X char c, *limit; X unsigned short segment, offset, offset1; X register struct rs_struct *rs; X extern char get_byte(); X X if (tp->tty_inhibited != RUNNING) return; X X line = tp - &tty_struct[0]; /* line is index into tty_struct */ X rs = &rs_struct[line - NR_CONS]; /* 0 to NR_CONS - 1 are consoles */ X X /* Copy bytes from user space to rs_buf. */ X limit = &rs->rs_buf[RS_BUF_SIZE - SPARE]; X segment = (tp->tty_phys >> 4) & WORD_MASK; X offset = tp->tty_phys & OFF_MASK; X offset1 = offset; X X /* While there is still data to output and there is still room in buf, copy*/ X while (tp->tty_outleft > 0 && rs->rs_next + rs->rs_left < limit) { X c = get_byte(segment, offset); /* fetch 1 byte */ X offset++; X tp->tty_outleft--; X if (c < ' ') { X rs_expand(tp, rs, c); /* insert the char in rs_buf */ X } else { X *(rs->rs_next + rs->rs_left) = c; /* avoid proc call */ X rs->rs_left++; X tp->tty_column++; X } X } X X bytes = offset - offset1; /* does not include '\r' or tab exp */ X tp->tty_cum += bytes; /* update cumulative total */ X tp->tty_phys += bytes; /* next time, take different bytes */ X X if (!rs->rs_busy) { /* is the line idle? */ X rs->rs_busy = TRUE; /* if so, mark it as busy */ X rs_feed(rs); /* and start it going */ X } X} X X X/*===========================================================================* X * rs_out_char * X *===========================================================================*/ XPRIVATE rs_out_char(tp, c) Xregister struct tty_struct *tp; /* pointer to tty struct */ Xchar c; /* character to be output */ X{ X/* Output a character on an RS232 line. */ X X int line, old_state; X register struct rs_struct *rs; X X /* See if there is room to store a character, and if so, do it. */ X old_state = lock(); X line = tp - tty_struct; X rs = &rs_struct[line - NR_CONS]; X if (rs->rs_next + rs->rs_left == &rs->rs_buf[RS_BUF_SIZE]) return; /*full */ X rs_expand(tp, rs, c); X X if (!rs->rs_busy) { /* if terminal line is idle, start it */ X rs->rs_busy = TRUE; X rs_feed(rs); X } X restore(old_state); X} X X X/*===========================================================================* X * rs_expand * X *===========================================================================*/ XPRIVATE rs_expand(tp, rs, c) Xregister struct tty_struct *tp; /* pointer to tty struct */ Xregister struct rs_struct *rs; /* pointer to rs struct */ Xchar c; /* character to be output */ X{ X/* Some characters output to RS-232 lines need special processing, such as X * tab expansion and LF to CR+CF mapping. These things are done here. X */ X X int mode, count, count1; X char *deposit; /* where to deposit the next character */ X X mode = tp->tty_mode; X deposit = rs->rs_next + rs->rs_left; X X switch(c) { X case '\b': X tp->tty_column -= 2; /* it is incremented later */ X break; X X case '\r': X tp->tty_column = -1; /* it is incremented below */ X break; X X case '\n': X /* Check to see if LF has to be mapped to CR + LF. */ X if (mode & CRMOD) { X *deposit++ = '\r'; X rs->rs_left++; X tp->tty_column = -1; X } X break; X X case '\t': X count = 8 - (tp->tty_column % 8); /* # spaces */ X count1 = count; X if ((mode & XTABS) == XTABS) { X /* Tabs must be expanded. */ X while (count1--) *deposit++ = ' '; X rs->rs_left += count; X tp->tty_column += count; X return; X } else { X /* Tabs are sent to the terminal hardware. */ X tp->tty_column += count - 1; X } X } X X /* Output character and update counters. */ X *deposit = c; /* copy character to rs_buf */ X rs->rs_left++; /* there is one more character to print */ X tp->tty_column++; /* update column */ X} X X X/*===========================================================================* X * tty_o_done * X *===========================================================================*/ XPRIVATE int tty_o_done() X{ X/* A write request on an RS232 line has completed. Send FS a message. */ X X int replyee, caller, old_state; X struct tty_struct *tp; X X /* See if any of the RS232 lines are complete. Send at most one message. */ X old_state = lock(); X for (tp = &tty_struct[NR_CONS]; tp < &tty_struct[NR_CONS+NR_RS_LINES]; tp++){ X if (tp->tty_waiting == COMPLETED) { X replyee = (int) tp->tty_otcaller; X caller = (int) tp->tty_outproc; X tty_reply(REVIVE, replyee, caller, tp->tty_cum, 0L, 0L); X tp->tty_waiting = NOT_WAITING; X output_done--; X restore(old_state); X return(1); X } X } X restore(old_state); X return(0); X} X X/*===========================================================================* X * rs_sig * X *===========================================================================*/ XPRIVATE rs_sig(tp) Xstruct tty_struct *tp; X{ X/* Called when a DEL character is typed. It resets the output. */ X X int line; X struct rs_struct *rs; X X line = tp - tty_struct; X rs = &rs_struct[line - NR_CONS]; X rs->rs_left = 0; X rs->rs_busy = 0; X rs->rs_next = &rs->rs_buf[0]; X} X X X/*===========================================================================* X * init_rs232 * X *===========================================================================*/ XPRIVATE init_rs232() X{ X register struct tty_struct *tp; X register struct rs_struct *rs; X int line; X X for (tp = &tty_struct[NR_CONS]; tp < &tty_struct[NR_CONS+NR_RS_LINES]; tp++){ X tp->tty_inhead = tp->tty_inqueue; X tp->tty_intail = tp->tty_inqueue; X/* tp->tty_mode = CRMOD | XTABS | ECHO; */ X tp->tty_mode = RAW | BITS8; X tp->tty_devstart = start_rs232; X tp->tty_erase = ERASE_CHAR; X tp->tty_kill = KILL_CHAR; X tp->tty_intr = INTR_CHAR; X tp->tty_quit = QUIT_CHAR; X tp->tty_xon = XON_CHAR; X tp->tty_xoff = XOFF_CHAR; X tp->tty_eof = EOT_CHAR; X tp->tty_makebreak = ONE_INT; /* RS232 only interrupts once/char */ X } X X#if NR_RS_LINES > 0 X rs_struct[0].rs_base = PRIMARY; X#endif X#if NR_RS_LINES > 1 X rs_struct[1].rs_base = SECONDARY; X#endif X X for (rs = &rs_struct[0]; rs < &rs_struct[NR_RS_LINES]; rs++) { X line = rs - rs_struct + NR_CONS; X rs->rs_next = & rs->rs_buf[0]; X rs->rs_left = 0; X rs->rs_busy = FALSE; X config_rs232(line, DEF_BAUD, DEF_BAUD, NONE, 1, 8); /* set params */ X port_out(rs->rs_base + RS232_MODEM_CONTROL, MODEM_CONTROLS); X port_out(rs->rs_base + RS232_INTERRUPTS, RS232_INTERRUPT_CLASSES); X } X} X X X/*===========================================================================* X * set_uart * X *===========================================================================*/ XPRIVATE set_uart(line, mode, speeds) Xint line; /* which line number (>= NR_CONS) */ Xint mode; /* sgtty.h sg_mode word */ Xint speeds; /* low byte is input speed, next is output */ X{ X/* Set the UART parameters. */ X int in_baud, out_baud, parity, stop_bits, data_bits; X X in_baud = 100 * (speeds & BYTE); X if (in_baud == 100) in_baud = 110; X out_baud = 100 * ((speeds >> 8) & BYTE); X if (out_baud == 100) out_baud = 110; X parity = NONE; X if (mode & ODDP) parity = ODD; X if (mode & EVENP) parity = EVEN; X stop_bits = (in_baud == 110 ? 2 : 1); /* not quite cricket */ X data_bits = 5 + ((mode >> DATA_LEN) & 03); X config_rs232(line, in_baud, out_baud, parity, stop_bits, data_bits); X} X X X/*===========================================================================* X * config_rs232 * X *===========================================================================*/ XPRIVATE config_rs232(line, in_baud, out_baud, parity, stop_bits, data_bits) Xint line; /* which tty */ Xint in_baud; /* input speed: 110, 300, 1200, etc. */ Xint out_baud; /* output speed: 110, 300, 1200, etc. */ Xint parity; /* EVEN, ODD, or NONE */ Xint stop_bits; /* 2 (110 baud) or 1 (other speeds) */ Xint data_bits; /* 5, 6, 7, or 8 */ X{ X/* Set various line control parameters for RS232 I/O. X * If DataBits == 5 and StopBits == 2, UART will generate 1.5 stop bits X * The 8250 can't handle split speed, but we have propagated both speeds X * anyway for the benefit of future UART chips. X */ X X int line_controls = 0, base, freq; X X base = rs_struct[line - NR_CONS].rs_base; X X /* First tell line control register to address baud rate divisor */ X port_out(base + RS232_LINE_CONTROL, ADDRESS_DIVISOR); X X /* Now set the baud rate. */ X if (in_baud < 50) in_baud = DEF_BAUD; /* prevent divide overflow */ X if (out_baud < 50) out_baud = DEF_BAUD; /* prevent divide overflow */ X freq = (int) (UART_FREQ / in_baud); /* UART can't hack 2 speeds */ X port_out(base + RS232_RATE_DIVISOR, freq & BYTE); X port_out(base + RS232_RATE_DIVISOR+1, (freq >> 8) & BYTE); X tty_struct[line].tty_speed = ((out_baud/100) << 8) | (in_baud/100); X X /* Put parity_type bits in line_controls */ X if (parity != NONE) { X line_controls |= PARITY_ON_OFF; X line_controls |= (parity << PARITY_TYPE_SHIFT); X } X X /* Put #stop_bits bits in line_controls */ X if (stop_bits == 1 || stop_bits == 2) X line_controls |= (stop_bits - 1) << STOP_BITS_SHIFT; X X /* Put #data_bits bits in line_controls */ X if (data_bits >=5 && data_bits <= 8) X line_controls |= (data_bits - 5); X X port_out(base + RS232_LINE_CONTROL, line_controls); X} + END-OF-FILE rs232.c.new chmod 'u=rw,g=r,o=r' 'rs232.c.new' set `wc -c 'rs232.c.new'` count=$1 case $count in 18997) :;; *) echo 'Bad character count in ''rs232.c.new' >&2 echo 'Count should be 18997' >&2 esac echo Extracting 'table.c.cdif' sed 's/^X//' > 'table.c.cdif' << '+ END-OF-FILE ''table.c.cdif' X*** /local/ast/minix/tape3b/kernel/table.c Wed Jul 13 16:59:21 1988 X--- table.c Tue Sep 27 08:51:20 1988 X*************** X*** 32,37 **** X--- 32,38 ---- X #define EXTERN X #include "glo.h" X #include "proc.h" X+ #include "tty.h" X X extern int sys_task(), clock_task(), mem_task(), floppy_task(), X winchester_task(), tty_task(), printer_task(); + END-OF-FILE table.c.cdif chmod 'u=rw,g=r,o=r' 'table.c.cdif' set `wc -c 'table.c.cdif'` count=$1 case $count in 356) :;; *) echo 'Bad character count in ''table.c.cdif' >&2 echo 'Count should be 356' >&2 esac echo Extracting 'tty.c' sed 's/^X//' > 'tty.c' << '+ END-OF-FILE ''tty.c' X/* This file contains the terminal driver, both for the IBM console and regular X * ASCII terminals. It is split into two sections, a device-independent part X * and a device-dependent part. The device-independent part accepts X * characters to be printed from programs and queues them in a standard way X * for device-dependent output. It also accepts input and queues it for X * programs. This file contains 2 main entry points: tty_task() and keyboard(). X * When a key is struck on a terminal, an interrupt to an assembly language X * routine is generated. This routine saves the machine state and registers X * and calls keyboard(), which enters the character in an internal table, and X * then sends a message to the terminal task. The main program of the terminal X * task is tty_task(). It accepts not only messages about typed input, but X * also requests to read and write from terminals, etc. X * X * The device-dependent part interfaces with the IBM console and ASCII X * terminals. The IBM keyboard is unusual in that keystrokes yield key numbers X * rather than ASCII codes, and furthermore, an interrupt is generated when a X * key is depressed and again when it is released. The IBM display is memory X * mapped, so outputting characters such as line feed, backspace and bell are X * tricky. X * X * The valid messages and their parameters are: X * X * TTY_CHAR_INT: a character has been typed (character arrived interrupt) X * TTY_READ: a process wants to read from a terminal X * TTY_WRITE: a process wants to write on a terminal X * TTY_IOCTL: a process wants to change a terminal's parameters X * TTY_SETPGRP: indicate a change in a control terminal X * CANCEL: terminate a previous incomplete system call immediately X * X * m_type TTY_LINE PROC_NR COUNT TTY_SPEK TTY_FLAGS ADDRESS X * --------------------------------------------------------------------------- X * | TTY_CHAR_INT| | | | | |array ptr| X * |-------------+---------+---------+---------+---------+---------+---------| X * | TTY_O_DONE |minor dev| | | | |array ptr| X * |-------------+---------+---------+---------+---------+---------+---------| X * | TTY_READ |minor dev| proc nr | count | | | buf ptr | X * |-------------+---------+---------+---------+---------+---------+---------| X * | TTY_WRITE |minor dev| proc nr | count | | | buf ptr | X * |-------------+---------+---------+---------+---------+---------+---------| X * | TTY_IOCTL |minor dev| proc nr |func code|erase etc| flags | | X * |-------------+---------+---------+---------+---------+---------+---------| X * | TTY_SETPGRP |minor dev| proc nr | | | | | X * |-------------+---------+---------+---------+---------+---------+--------- X * | CANCEL |minor dev| proc nr | | | | | X * --------------------------------------------------------------------------- X */ X X#include "../h/const.h" X#include "../h/type.h" X#include "../h/callnr.h" X#include "../h/com.h" X#include "../h/error.h" X#include "../h/sgtty.h" X#include "../h/signal.h" X#include "const.h" X#include "type.h" X#include "glo.h" X#include "proc.h" X#include "tty.h" X#include "ttymaps.h" X X/*===========================================================================* X * tty_task * X *===========================================================================*/ XPUBLIC tty_task() X{ X/* Main routine of the terminal task. */ X X message tty_mess; /* buffer for all incoming messages */ X register struct tty_struct *tp; X X tty_init(); /* initialize */ X init_rs232(); X X while (TRUE) { X receive(ANY, &tty_mess); X tp = &tty_struct[tty_mess.TTY_LINE]; X switch(tty_mess.m_type) { X case TTY_O_DONE: /* same action as TTY_CHAR_INT */ X case TTY_CHAR_INT: do_int(&tty_mess); break; X case TTY_READ: do_read(tp, &tty_mess); break; X case TTY_WRITE: do_write(tp, &tty_mess); break; X case TTY_IOCTL: do_ioctl(tp, &tty_mess); break; X case TTY_SETPGRP: do_setpgrp(tp, &tty_mess); break; X case CANCEL: do_cancel(tp, &tty_mess); break; X default: tty_reply(TASK_REPLY, tty_mess.m_source, X tty_mess.PROC_NR, EINVAL, 0L, 0L); X } X } X} X X X/*===========================================================================* X * do_int * X *===========================================================================*/ XPRIVATE do_int(m_ptr) Xmessage *m_ptr; X{ X/* The TTY task can generate two kinds of interrupts: X * - a character has been typed on the console or an RS232 line X * - an RS232 line has completed a write request (on behalf of a user) X * If either interrupt happens and the TTY task is idle, the task gets the X * interrupt message immediately and processes it. However, if the TTY X * task is busy, a bit is set in 'busy_map' and the message pointer stored. X * If multiple messages happen, the bit is only set once. No input data is X * lost even if this happens because all the input messages say is that there X * is some input. The actual input is in the tty_driver_buf array, so losing X * a message just means that when the one interrupt-generated message is given X * to the TTY task, it will find multiple characters in tty_driver_buf. X * X * The introduction of RS232 lines has complicated this situation somewhat. Now X * a message can mean that some RS232 line has finished transmitting all the X * output given to it. If a character is typed at the instant an RS232 line X * finishes, one of the two messages may be overwritten because MINIX only X * provides single buffering for interrupt messages (in proc.c).To avoid losing X * information, whenever an RS232 line finishes, the flag tty_waiting is set X * to COMPLETED and kept that way until its completion is processed and a X * message sent to FS saying that output is done. The number of RS232 lines in X * COMPLETED state is kept in output_done, which is checked on each interrupt, X * so that a lost TTY_O_DONE line completion interrupt will be quickly X * recovered. X * X * In short, when this procedure is called, it can check for RS232 line done X * by inspecting output_done and it can check for characters in the input X * buffer by inspecting tty_driver_buf[0]. Thus losing a message to the TTY X * task is not serious because the underlying conditions are explicitly checked X * for on each interrupt. X */ X X /* First check to see if any RS232 lines have completed. */ X if (output_done > 0) { X /* If a message is sent to FS for RS232 done, don't process any input X * characters now for fear of sending a second message to FS, which X * would be lost. X */ X if (tty_o_done()) { X return; X } X } X charint(m_ptr); /* check for input characters */ X} X X X/*===========================================================================* X * charint * X *===========================================================================*/ XPRIVATE charint(m_ptr) Xmessage *m_ptr; /* message containing pointer to char(s) */ X{ X/* A character has been typed. If a character is typed and the tty task is X * not able to service it immediately, the character is accumulated within X * the tty driver. Thus multiple chars may be accumulated. A single message X * to the tty task may have to process several characters. X */ X X int m, n, count, replyee, caller, old_state; X char *ptr, *copy_ptr, ch; X struct tty_struct *tp; X X old_state = lock(); X ptr = m_ptr->ADDRESS; /* pointer to accumulated char array */ X copy_ptr = tty_copy_buf; /* ptr to shadow array where chars copied */ X n = *ptr; /* how many chars have been accumulated */ X count = n; /* save the character count */ X n = n + n; /* each char occupies 2 bytes */ X ptr += 2; /* skip count field at start of array */ X while (n-- > 0) X *copy_ptr++ = *ptr++; /* copy the array to safety */ X ptr = m_ptr->ADDRESS; X *ptr = 0; /* accumulation count set to 0 */ X restore(old_state); X X /* Loop on the accumulated characters, processing each in turn. */ X if (count == 0) return; /* on TTY_O_DONE interrupt, count might be 0 */ X copy_ptr = tty_copy_buf; X while (count-- > 0) { X ch = *copy_ptr++; /* get the character typed */ X n = *copy_ptr++; /* get the line number it came in on */ X in_char(n, ch); /* queue the char and echo it */ X X /* See if a previously blocked reader can now be satisfied. */ X tp = &tty_struct[n]; /* pointer to struct for this character */ X if (tp->tty_inleft > 0 ) { /* does anybody want input? */ X m = tp->tty_mode & (CBREAK | RAW); X if (tp->tty_lfct > 0 || (m != 0 && tp->tty_incount > 0)) { X m = rd_chars(tp); X X /* Tell hanging reader that chars have arrived. */ X replyee = (int) tp->tty_incaller; X caller = (int) tp->tty_inproc; X tty_reply(REVIVE, replyee, caller, m, 0L, 0L); X } X } X } X} X X X/*===========================================================================* X * in_char * X *===========================================================================*/ XPRIVATE in_char(line, ch) Xint line; /* line number on which char arrived */ Xchar ch; /* scan code for character that arrived */ X{ X/* A character has just been typed in. Process, save, and echo it. */ X X register struct tty_struct *tp; X int mode, sig, scode, c; X int make_break(); X X scode = ch; /* save the scan code */ X tp = &tty_struct[line]; /* set 'tp' to point to proper struct */ X X /* Function keys are temporarily being used for debug dumps. */ X if (line == 0 && ch >= F1 && ch <= F10) { /* Check for function keys */ X func_key(ch); /* process function key */ X return; X } X if (tp->tty_incount >= TTY_IN_BYTES) return; /* no room, discard char */ X mode = tp->tty_mode & (RAW | CBREAK); X if (tp->tty_makebreak == TWO_INTS) { X c = make_break(ch); /* console give 2 ints/ch */ X if (c == -1) return; X ch = c; X } X else X if (mode != RAW) ch &= 0177; /* 7-bit chars except in raw mode */ X X /* Processing for COOKED and CBREAK mode contains special checks. */ X if (mode == COOKED || mode == CBREAK) { X /* Handle erase, kill and escape processing. */ X if (mode == COOKED) { X /* First erase processing (rub out of last character). */ X if (ch == tp->tty_erase && tp->tty_escaped == NOT_ESCAPED) { X if (chuck(tp) != -1) { /* remove last char entered */ X echo(tp, '\b'); /* remove it from the screen */ X echo(tp, ' '); X echo(tp, '\b'); X } X return; X } X X /* Now do kill processing (remove current line). */ X if (ch == tp->tty_kill && tp->tty_escaped == NOT_ESCAPED) { X while( chuck(tp) == OK) /* keep looping */ ; X echo(tp, tp->tty_kill); X echo (tp, '\n'); X return; X } X X /* Handle EOT and the escape symbol (backslash). */ X if (tp->tty_escaped == NOT_ESCAPED) { X /* Normal case: previous char was not backslash. */ X if (ch == '\\') { X /* An escaped symbol has just been typed. */ X tp->tty_escaped = ESCAPED; X echo(tp, ch); X return; /* do not store the '\' */ X } X /* CTRL-D means end-of-file, unless it is escaped. It X * is stored in the text as MARKER, and counts as a X * line feed in terms of knowing whether a full line X * has been typed already. X */ X if (ch == tp->tty_eof) { X ch = MARKER; X tp->tty_lfct++; /* counts as LF */ X } X } else { X /* Previous character was backslash. */ X tp->tty_escaped = NOT_ESCAPED; /* turn escaping off */ X if (ch != tp->tty_erase && ch != tp->tty_kill && X ch != tp->tty_eof) { X /* Store the escape previously skipped over */ X *tp->tty_inhead++ = '\\'; X tp->tty_incount++; X if (tp->tty_inhead == X &tp->tty_inqueue[TTY_IN_BYTES]) X tp->tty_inhead = tp->tty_inqueue; X } X } X } X /* Both COOKED and CBREAK modes come here; first map CR to LF. */ X if (ch == '\r' && (tp->tty_mode & CRMOD)) ch = '\n'; X X /* Check for interrupt and quit characters. */ X if (ch == tp->tty_intr || ch == tp->tty_quit) { X sig = (ch == tp->tty_intr ? SIGINT : SIGQUIT); X sigchar(tp, sig); X return; X } X X /* Check for and process CTRL-S (terminal stop). */ X if (ch == tp->tty_xoff) { X tp->tty_inhibited = STOPPED; X return; X } X X /* Check for and process CTRL-Q (terminal start). */ X if (tp->tty_inhibited == STOPPED) { X tp->tty_inhibited = RUNNING; X (*tp->tty_devstart)(tp); /* resume output */ X return; X } X } X X /* All 3 modes come here. */ X if (ch == '\n') tp->tty_lfct++; /* count line feeds */ X X /* The numeric pad generates ASCII escape sequences: ESC [ letter */ X if (line == 0 && scode >= SCODE1 && scode <= SCODE2 && X shift1 == 0 && shift2 == 0 && numlock == 0) { X /* This key is to generate a three-character escape sequence. */ X *tp->tty_inhead++ = ESC; /* put ESC in the input queue */ X if (tp->tty_inhead == &tp->tty_inqueue[TTY_IN_BYTES]) X tp->tty_inhead = tp->tty_inqueue; /* handle wraparound */ X tp->tty_incount++; X echo(tp, 'E'); X *tp->tty_inhead++ = BRACKET; /* put ESC in the input queue */ X if (tp->tty_inhead == &tp->tty_inqueue[TTY_IN_BYTES]) X tp->tty_inhead = tp->tty_inqueue; /* handle wraparound */ X tp->tty_incount++; X echo(tp, BRACKET); X ch = scode_map[scode-SCODE1]; /* generate the letter */ X } X X *tp->tty_inhead++ = ch; /* save the character in the input queue */ X if (tp->tty_inhead == &tp->tty_inqueue[TTY_IN_BYTES]) X tp->tty_inhead = tp->tty_inqueue; /* handle wraparound */ X tp->tty_incount++; X echo(tp, ch); X} X X X#ifdef i8088 X/*===========================================================================* X * make_break * X *===========================================================================*/ XPRIVATE int make_break(ch) Xchar ch; /* scan code of key just struck or released */ X{ X/* This routine can handle keyboards that interrupt only on key depression, X * as well as keyboards that interrupt on key depression and key release. X * For efficiency, the interrupt routine filters out most key releases. X */ X X int c, make, code; X X c = ch & 0177; /* high-order bit set on key release */ X make = (ch & 0200 ? 0 : 1); /* 1 when key depressed, 0 when key released */ X X if (alt && keyb_type == DUTCH_EXT) X code = alt_c[c]; X else X code = (shift1 || shift2 ? sh[c] : unsh[c]); X X if (control && c < TOP_ROW) code = sh[c]; /* CTRL-(top row) */ X if (numlock && c > 70 && c < 0x56) X code = (shift1 || shift2 ? unsh[c] : sh[c]); X X code &= BYTE; X if (code < 0200 || code >= 0206) { X /* Ordinary key, i.e. not shift, control, alt, etc. */ X if (capslock) X if (code >= 'A' && code <= 'Z') X code += 'a' - 'A'; X else if (code >= 'a' && code <= 'z') X code -= 'a' - 'A'; X if (alt && keyb_type != DUTCH_EXT) code |= 0200; /* alt ORs in 0200 */ X if (control) code &= 037; X if (make == 0) code = -1; /* key release */ X return(code); X } X X /* Table entries 0200 - 0206 denote special actions. */ X switch(code - 0200) { X case 0: shift1 = make; break; /* shift key on left */ X case 1: shift2 = make; break; /* shift key on right */ X case 2: control = make; break; /* control */ X case 3: alt = make; break; /* alt key */ X case 4: if (make && caps_off) { X capslock = 1 - capslock; X set_leds(); X } X caps_off = 1 - make; X break; /* caps lock */ X case 5: if (make && num_off) { X numlock = 1 - numlock; X set_leds(); X } X num_off = 1 - make; X break; /* num lock */ X } X return(-1); X} X#endif X X X/*===========================================================================* X * echo * X *===========================================================================*/ XPRIVATE echo(tp, c) Xregister struct tty_struct *tp; /* terminal on which to echo */ Xregister char c; /* character to echo */ X{ X/* Echo a character on the terminal. */ X X if ( (tp->tty_mode & ECHO) == 0) return; /* if no echoing, don't echo */ X/* MARKER is meaningful only in cooked mode */ X if (c != MARKER || tp->tty_mode & (CBREAK | RAW)) { X if (tp - tty_struct < NR_CONS) X out_char(tp, c); /* echo to console */ X else X rs_out_char(tp, c); /* echo to RS232 line */ X } X flush(tp); /* force character out onto the screen */ X} X X X/*===========================================================================* X * chuck * X *===========================================================================*/ XPRIVATE int chuck(tp) Xregister struct tty_struct *tp; /* from which tty should chars be removed */ X{ X/* Delete one character from the input queue. Used for erase and kill. */ X X char *prev; X X /* If input queue is empty, don't delete anything. */ X if (tp->tty_incount == 0) return(-1); X X /* Don't delete '\n' or '\r'. */ X prev = (tp->tty_inhead != tp->tty_inqueue ? tp->tty_inhead - 1 : X &tp->tty_inqueue[TTY_IN_BYTES-1]); X if (*prev == '\n' || *prev == '\r') return(-1); X tp->tty_inhead = prev; X tp->tty_incount--; X return(OK); /* char erasure was possible */ X} X X X/*===========================================================================* X * do_read * X *===========================================================================*/ XPRIVATE do_read(tp, m_ptr) Xregister struct tty_struct *tp; /* pointer to tty struct */ Xmessage *m_ptr; /* pointer to message sent to the task */ X{ X/* A process wants to read from a terminal. */ X X int code, caller; X X X if (tp->tty_inleft > 0) { /* if someone else is hanging, give up */ X tty_reply(TASK_REPLY, m_ptr->m_source, m_ptr->PROC_NR, EIO, 0L, 0L); X return; X } X X /* Copy information from the message to the tty struct. */ X tp->tty_incaller = m_ptr->m_source; X tp->tty_inproc = m_ptr->PROC_NR; X tp->tty_in_vir = m_ptr->ADDRESS; X tp->tty_inleft = m_ptr->COUNT; X X /* Try to get chars. This call either gets enough, or gets nothing. */ X code = rd_chars(tp); X X caller = (int) tp->tty_inproc; X tty_reply(TASK_REPLY, m_ptr->m_source, caller, code, 0L, 0L); X} X X X/*===========================================================================* X * rd_chars * X *===========================================================================*/ XPRIVATE int rd_chars(tp) Xregister struct tty_struct *tp; /* pointer to terminal to read from */ X{ X/* A process wants to read from a terminal. First check if enough data is X * available. If so, pass it to the user. If not, send FS a message telling X * it to suspend the user. When enough data arrives later, the tty driver X * copies it to the user space directly and notifies FS with a message. X */ X X int cooked, ct, user_ct, buf_ct, cum, enough, eot_seen; X vir_bytes in_vir, left; X phys_bytes user_phys, tty_phys; X char ch, *tty_ptr; X struct proc *rp; X extern phys_bytes umap(); X X cooked = ( (tp->tty_mode & (RAW | CBREAK)) ? 0 : 1); /* 1 iff COOKED mode */ X if (tp->tty_incount == 0 || (cooked && tp->tty_lfct == 0)) return(SUSPEND); X rp = proc_addr(tp->tty_inproc); X in_vir = (vir_bytes) tp-> tty_in_vir; X left = (vir_bytes) tp->tty_inleft; X if ( (user_phys = umap(rp, D, in_vir, left)) == 0) return(E_BAD_ADDR); X tty_phys = umap(proc_addr(TTY), D, (vir_bytes) tty_buf, TTY_BUF_SIZE); X cum = 0; X enough = 0; X eot_seen = 0; X X /* The outer loop iterates on buffers, one buffer load per iteration. */ X while (tp->tty_inleft > 0) { X buf_ct = MIN(tp->tty_inleft, tp->tty_incount); X buf_ct = MIN(buf_ct, TTY_BUF_SIZE); X ct = 0; X tty_ptr = tty_buf; X X /* The inner loop fills one buffer. */ X while(buf_ct-- > 0) { X ch = *tp->tty_intail++; X if (tp->tty_intail == &tp->tty_inqueue[TTY_IN_BYTES]) X tp->tty_intail = tp->tty_inqueue; X *tty_ptr++ = ch; X ct++; X if (ch == '\n' || ch == MARKER && cooked) { X tp->tty_lfct--; X if (ch == MARKER) eot_seen++; X enough++; /* exit loop */ X if (cooked) break; /* only provide 1 line */ X } X } X X /* Copy one buffer to user space. Be careful about CTRL-D. In cooked X * mode it is not transmitted to user programs, and is not counted as X * a character as far as the count goes, but it does occupy space in X * the driver's tables and must be counted there. X */ X user_ct = (eot_seen ? ct - 1 : ct); /* bytes to copy to user */ X phys_copy(tty_phys, user_phys, (phys_bytes) user_ct); X user_phys += user_ct; X cum += user_ct; X tp->tty_inleft -= ct; X tp->tty_incount -= ct; X if (tp->tty_incount == 0 || enough) break; X } X X tp->tty_inleft = 0; X return(cum); X} X X X/*===========================================================================* X * finish * X *===========================================================================*/ XPUBLIC finish(tp, code) Xregister struct tty_struct *tp; /* pointer to tty struct */ Xint code; /* reply code */ X{ X/* A command has terminated (possibly due to DEL). Tell caller. */ X X int line, result, replyee, caller; X X tp->tty_rwords = 0; X tp->tty_outleft = 0; X if (tp->tty_waiting == NOT_WAITING) return; X line = tp - tty_struct; X result = (line < NR_CONS ? TASK_REPLY : REVIVE); X replyee = (int) tp->tty_otcaller; X caller = (int) tp->tty_outproc; X tty_reply(result, replyee, caller, code, 0L, 0L); X tp->tty_waiting = NOT_WAITING; X} X X X/*===========================================================================* X * do_write * X *===========================================================================*/ XPRIVATE do_write(tp, m_ptr) Xregister struct tty_struct *tp; /* pointer to tty struct */ Xmessage *m_ptr; /* pointer to message sent to the task */ X{ X/* A process wants to write on a terminal. */ X X vir_bytes out_vir, out_left; X struct proc *rp; X extern phys_bytes umap(); X int caller,replyee; X X /* If the slot is already in use, better return an error than mess it up. */ X if (tp->tty_outleft > 0) { /* if someone else is hanging, give up */ X tty_reply(TASK_REPLY, m_ptr->m_source, m_ptr->PROC_NR, EIO, 0L, 0L); X return; X } X X /* Copy message parameters to the tty structure. */ X tp->tty_otcaller = m_ptr->m_source; X tp->tty_outproc = m_ptr->PROC_NR; X tp->tty_out_vir = m_ptr->ADDRESS; X tp->tty_outleft = m_ptr->COUNT; X tp->tty_waiting = WAITING; X tp->tty_cum = 0; X X /* Compute the physical address where the data is in user space. */ X rp = proc_addr(tp->tty_outproc); X out_vir = (vir_bytes) tp->tty_out_vir; X out_left = (vir_bytes) tp->tty_outleft; X if ( (tp->tty_phys = umap(rp, D, out_vir, out_left)) == 0) { X /* Buffer address provided by user is outside its address space. */ X tp->tty_cum = E_BAD_ADDR; X tp->tty_outleft = 0; X } X X /* Copy characters from the user process to the terminal. */ X (*tp->tty_devstart)(tp); /* copy data to queue and start I/O */ X X /* If output is for a bitmapped terminal as the IBM-PC console, the output- X * routine will return at once so there is no need to suspend the caller, X * on ascii terminals however, the call is suspended and later revived. X */ X if (m_ptr->TTY_LINE != 0) { X caller = (int) tp->tty_outproc; X replyee = (int) tp->tty_otcaller; X tty_reply(TASK_REPLY, replyee, caller, SUSPEND, 0L, 0L); X } X} X X X/*===========================================================================* X * do_ioctl * X *===========================================================================*/ XPRIVATE do_ioctl(tp, m_ptr) Xregister struct tty_struct *tp; /* pointer to tty_struct */ Xmessage *m_ptr; /* pointer to message sent to task */ X{ X/* Perform IOCTL on this terminal. */ X X long flags, erki, erase, kill, intr, quit, xon, xoff, eof; X int r; X X r = OK; X flags = 0; X erki = 0; X switch(m_ptr->TTY_REQUEST) { X case TIOCSETP: X /* Set erase, kill, and flags. */ X tp->tty_erase = (char) ((m_ptr->TTY_SPEK >> 8) & BYTE); /* erase */ X tp->tty_kill = (char) ((m_ptr->TTY_SPEK >> 0) & BYTE); /* kill */ X tp->tty_mode = (int) m_ptr->TTY_FLAGS; /* mode word */ X if (m_ptr->TTY_SPEED != 0) tp->tty_speed = m_ptr->TTY_SPEED; X if (tp-tty_struct >= NR_CONS) X set_uart(tp - tty_struct, tp->tty_mode, tp->tty_speed); X break; X X case TIOCSETC: X /* Set intr, quit, xon, xoff, eof (brk not used). */ X tp->tty_intr = (char) ((m_ptr->TTY_SPEK >> 24) & BYTE); /* interrupt */ X tp->tty_quit = (char) ((m_ptr->TTY_SPEK >> 16) & BYTE); /* quit */ X tp->tty_xon = (char) ((m_ptr->TTY_SPEK >> 8) & BYTE); /* CTRL-S */ X tp->tty_xoff = (char) ((m_ptr->TTY_SPEK >> 0) & BYTE); /* CTRL-Q */ X tp->tty_eof = (char) ((m_ptr->TTY_FLAGS >> 8) & BYTE); /* CTRL-D */ X break; X X case TIOCGETP: X /* Get erase, kill, and flags. */ X erase = ((long) tp->tty_erase) & BYTE; X kill = ((long) tp->tty_kill) & BYTE; X erki = (erase << 8) | kill; X flags = ( (long) tp->tty_speed << 16) | (long) tp->tty_mode; X break; X X case TIOCGETC: X /* Get intr, quit, xon, xoff, eof. */ X intr = ((long) tp->tty_intr) & BYTE; X quit = ((long) tp->tty_quit) & BYTE; X xon = ((long) tp->tty_xon) & BYTE; X xoff = ((long) tp->tty_xoff) & BYTE; X eof = ((long) tp->tty_eof) & BYTE; X erki = (intr << 24) | (quit << 16) | (xon << 8) | (xoff << 0); X flags = (eof <<8); X break; X X default: X r = EINVAL; X } X X /* Send the reply. */ X tty_reply(TASK_REPLY, m_ptr->m_source, m_ptr->PROC_NR, r, flags, erki); X} X X X/*===========================================================================* X * do_setpgrp * X *===========================================================================*/ XPRIVATE do_setpgrp(tp, m_ptr) Xregister struct tty_struct *tp; /* pointer to tty struct */ Xmessage *m_ptr; /* pointer to message sent to task */ X{ X/* A control process group has changed */ X X tp->tty_pgrp = m_ptr->TTY_PGRP; X tty_reply(TASK_REPLY, m_ptr->m_source, m_ptr->PROC_NR, OK, 0L, 0L); X} X X X/*===========================================================================* X * do_cancel * X *===========================================================================*/ XPRIVATE do_cancel(tp, m_ptr) Xregister struct tty_struct *tp; /* pointer to tty_struct */ Xmessage *m_ptr; /* pointer to message sent to task */ X{ X/* A signal has been sent to a process that is hanging trying to read or write. X * The pending read or write must be finished off immediately. X */ X X int mode; X X /* First check to see if the process is indeed hanging. If it is not, don't X * reply (to avoid race conditions). X */ X if (tp->tty_inleft == 0 && tp->tty_outleft == 0) return; X X /* Kill off input/output. */ X mode = m_ptr->COUNT; X if (mode & R_BIT) { X /* Process was reading when killed. Clean up input. */ X tp->tty_inhead = tp->tty_inqueue; /* discard all data */ X tp->tty_intail = tp->tty_inqueue; X tp->tty_incount = 0; X tp->tty_lfct = 0; X tp->tty_inleft = 0; X tp->tty_inhibited = RUNNING; X } X if (mode & W_BIT) { X /* Process was writing when killed. Clean up output. */ X tp->tty_outleft = 0; X tp->tty_waiting = NOT_WAITING; /* don't send reply */ X } X tty_reply(TASK_REPLY, m_ptr->m_source, m_ptr->PROC_NR, EINTR, 0L, 0L); X} X X X/*===========================================================================* X * tty_reply * X *===========================================================================*/ XPUBLIC tty_reply(code, replyee, proc_nr, status, extra, other) Xint code; /* TASK_REPLY or REVIVE */ Xint replyee; /* destination address for the reply */ Xint proc_nr; /* to whom should the reply go? */ Xint status; /* reply code */ Xlong extra; /* extra value */ Xlong other; /* used for IOCTL replies */ X{ X/* Send a reply to a process that wanted to read or write data. */ X X message tty_mess; X X tty_mess.m_type = code; X tty_mess.REP_PROC_NR = proc_nr; X tty_mess.REP_STATUS = status; X tty_mess.TTY_FLAGS = extra; /* used by IOCTL for flags (mode) */ X tty_mess.TTY_SPEK = other; /* used by IOCTL for erase and kill chars */ X send(replyee, &tty_mess); X} X X X/*===========================================================================* X * sigchar * X *===========================================================================*/ XPUBLIC sigchar(tp, sig) Xregister struct tty_struct *tp; /* pointer to tty_struct */ Xint sig; /* SIGINT, SIGQUIT, or SIGKILL */ X{ X/* Process a SIGINT, SIGQUIT or SIGKILL char from the keyboard */ X X tp->tty_inhibited = RUNNING; /* do implied CRTL-Q */ X finish(tp, EINTR); /* send reply */ X tp->tty_inhead = tp->tty_inqueue; /* discard input */ X tp->tty_intail = tp->tty_inqueue; X tp->tty_incount = 0; X tp->tty_lfct = 0; X if (tp >= &tty_struct[NR_CONS]) rs_sig(tp); /* RS232 only */ X if (tp->tty_pgrp) cause_sig(tp->tty_pgrp, sig); X} + END-OF-FILE tty.c chmod 'u=rw,g=r,o=r' 'tty.c' set `wc -c 'tty.c'` count=$1 case $count in 28048) :;; *) echo 'Bad character count in ''tty.c' >&2 echo 'Count should be 28048' >&2 esac echo Extracting 'tty.h.new' sed 's/^X//' > 'tty.h.new' << '+ END-OF-FILE ''tty.h.new' X#define NR_CONS 1 /* how many consoles can system handle */ X#define NR_RS_LINES 1 /* how many rs232 terminals can system handle*/ X#define TTY_IN_BYTES 200 /* input queue size */ X#define TTY_RAM_WORDS 320 /* ram buffer size */ X#define TTY_BUF_SIZE 256 /* unit for copying to/from queues */ X#define TAB_SIZE 8 /* distance between tabs */ X#define TAB_MASK 07 /* mask for tty_column when tabbing */ X#define WORD_MASK 0xFFFF /* mask for 16 bits */ X#define OFF_MASK 0x000F /* mask for 4 bits */ X#define MAX_OVERRUN 100 /* size of overrun input buffer */ X#define MAX_ESC_PARMS 2 /* number of escape sequence params allowed */ X X#define ERASE_CHAR '\b' /* default erase character */ X#define KILL_CHAR '@' /* default kill character */ X#define INTR_CHAR (char)0177 /* default interrupt character */ X#define QUIT_CHAR (char) 034 /* default quit character */ X#define XOFF_CHAR (char) 023 /* default x-off character (CTRL-S) */ X#define XON_CHAR (char) 021 /* default x-on character (CTRL-Q) */ X#define EOT_CHAR (char) 004 /* CTRL-D */ X/* X * This MARKER is used as an unambiguous flag for an unescaped end of X * file character. It is meaningful only in cooked mode. 0200 should X * never be used in cooked mode, since that is supposed to be used only X * for 7-bit ASCII. Be careful that code only checks X * for MARKER in cooked mode. This kludge is needed because X * chars are stored in char arrays, so there's no way to have a X * completely out of band value. X */ X#define MARKER (char) 0200 /* non-escaped CTRL-D stored as MARKER */ X#define SCODE1 71 /* scan code for Home on numeric pad */ X#define SCODE2 81 /* scan code for PgDn on numeric pad */ X#define DEL_CODE (char) 83 /* DEL for use in CTRL-ALT-DEL reboot */ X#define ESC (char) 033 /* escape */ X#define BRACKET '[' /* Part of the ESC [ letter escape seq */ X X#define F1 59 /* scan code for function key F1 */ X#define F2 60 /* scan code for function key F2 */ X#define F3 61 /* scan code for function key F3 */ X#define F4 62 /* scan code for function key F4 */ X#define F9 67 /* scan code for function key F9 */ X#define F10 68 /* scan code for function key F10 */ X#define TOP_ROW 14 /* codes below this are shifted if CTRL */ X X#define IBM_PC 1 /* Standard IBM keyboard */ X#define OLIVETTI 2 /* Olivetti keyboard */ X#define DUTCH_EXT 3 /* Dutch extended IBM keyboard */ X#define US_EXT 4 /* U.S. extended keyboard */ X#define NR_SCAN_CODES 0x69 /* Number of scan codes */ X XEXTERN struct tty_struct { X /* Input queue. Typed characters are stored here until read by a program. */ X char tty_inqueue[TTY_IN_BYTES]; /* array used to store the characters */ X char *tty_inhead; /* pointer to place where next char goes */ X char *tty_intail; /* pointer to next char to be given to prog */ X int tty_incount; /* # chars in tty_inqueue */ X int tty_lfct; /* # line feeds in tty_inqueue */ X X /* Output section. */ X int tty_ramqueue[TTY_RAM_WORDS]; /* buffer for video RAM */ X int tty_rwords; /* number of WORDS (not bytes) in outqueue */ X int tty_org; /* location in RAM where 6845 base points */ X int tty_vid; /* current position of cursor in video RAM */ X char tty_esc_state; /* 0=normal, 1=ESC, 2=ESC[ */ X char tty_esc_intro; /* Distinguishing character following ESC */ X int tty_esc_parmv[MAX_ESC_PARMS]; /* list of escape parameters */ X int *tty_esc_parmp; /* pointer to current escape parameter */ X int tty_attribute; /* current attribute byte << 8 */ X int (*tty_devstart)(); /* routine to start actual device output */ X X /* Terminal parameters and status. */ X int tty_mode; /* terminal mode set by IOCTL */ X int tty_speed; /* low byte is ispeed; high byte is ospeed */ X int tty_column; /* current column number (0-origin) */ X int tty_row; /* current row (0 at top of screen) */ X char tty_busy; /* 1 when output in progress, else 0 */ X char tty_escaped; /* 1 when '\' just seen, else 0 */ X char tty_inhibited; /* 1 when CTRL-S just seen (stops output) */ X char tty_makebreak; /* 1 for terminals that interrupt twice/key */ X char tty_waiting; /* 1 when output process waiting for reply */ X X /* User settable characters: erase, kill, interrupt, quit, x-on; x-off. */ X char tty_erase; /* char used to erase 1 char (init ^H) */ X char tty_kill; /* char used to erase a line (init @) */ X char tty_intr; /* char used to send SIGINT (init DEL) */ X char tty_quit; /* char used for core dump (init CTRL-\) */ X char tty_xon; /* char used to start output (init CTRL-Q)*/ X char tty_xoff; /* char used to stop output (init CTRL-S) */ X char tty_eof; /* char used to stop output (init CTRL-D) */ X X /* Information about incomplete I/O requests is stored here. */ X char tty_incaller; /* process that made the call (usually FS) */ X char tty_inproc; /* process that wants to read from tty */ X char *tty_in_vir; /* virtual address where data is to go */ X int tty_inleft; /* how many chars are still needed */ X char tty_otcaller; /* process that made the call (usually FS) */ X char tty_outproc; /* process that wants to write to tty */ X char *tty_out_vir; /* virtual address where data comes from */ X phys_bytes tty_phys; /* physical address where data comes from */ X int tty_outleft; /* # chars yet to be copied to tty_outqueue */ X int tty_cum; /* # chars copied to tty_outqueue so far */ X int tty_pgrp; /* slot number of controlling process */ X X /* Miscellaneous. */ X int tty_ioport; /* I/O port number for this terminal */ X} tty_struct[NR_CONS+NR_RS_LINES]; X X/* Values for the fields. */ X#define NOT_ESCAPED 0 /* previous character on this line not '\' */ X#define ESCAPED 1 /* previous character on this line was '\' */ X#define RUNNING 0 /* no CRTL-S has been typed to stop the tty */ X#define STOPPED 1 /* CTRL-S has been typed to stop the tty */ X#define INACTIVE 0 /* the tty is not printing */ X#define BUSY 1 /* the tty is printing */ X#define ONE_INT 0 /* regular terminals interrupt once per char */ X#define TWO_INTS 1 /* IBM console interrupts two times per char */ X#define NOT_WAITING 0 /* no output process is hanging */ X#define WAITING 1 /* an output process is waiting for a reply */ X#define COMPLETED 2 /* output done; send a completion message */ X XEXTERN char tty_driver_buf[2*MAX_OVERRUN+2]; /* driver collects chars here */ XEXTERN char tty_copy_buf[2*MAX_OVERRUN]; /* copy buf used to avoid races */ XEXTERN char tty_buf[TTY_BUF_SIZE]; /* scratch buffer to/from user space */ XEXTERN int shift1, shift2, capslock, numlock; /* keep track of shift keys */ XEXTERN int control, alt; /* keep track of key statii */ XEXTERN int caps_off; /* 1 = normal position, 0 = depressed */ XEXTERN int num_off; /* 1 = normal position, 0 = depressed */ XEXTERN int softscroll; /* 1 = software scrolling, 0 = hardware */ XEXTERN int output_done; /* number of RS232 output messages to be sent*/ XEXTERN int ega_origin; /* origin to set at next ega int */ XEXTERN int ega_line; /* line to set at next ega int */ XEXTERN int char_height; /* number of scan lines for a char */ XEXTERN int keyb_type; /* type of keyboard attached */ XEXTERN int minus_code; /* numeric minus on dutch extended keyboard */ XEXTERN int num_slash; /* scan code of numeric slash */ + END-OF-FILE tty.h.new chmod 'u=rw,g=r,o=r' 'tty.h.new' set `wc -c 'tty.h.new'` count=$1 case $count in 7512) :;; *) echo 'Bad character count in ''tty.h.new' >&2 echo 'Count should be 7512' >&2 esac echo Extracting 'ttymaps.h.new' sed 's/^X//' > 'ttymaps.h.new' << '+ END-OF-FILE ''ttymaps.h.new' X X/* Scan codes to ASCII for alt keys (IBM Extended keyboard) */ XPUBLIC char alt_c[NR_SCAN_CODES]; X X/* Scan codes to ASCII for unshifted keys for IBM-PC (default) */ XPUBLIC char unsh[NR_SCAN_CODES] = { X 0,033,'1','2','3','4','5','6', '7','8','9','0','-','=','\b','\t', X 'q','w','e','r','t','y','u','i', 'o','p','[',']',015,0202,'a','s', X 'd','f','g','h','j','k','l',';', 047,0140,0200,0134,'z','x','c','v', X 'b','n','m',',','.','/',0201,'*', 0203,' ',0204,0241,0242,0243,0244,0245, X 0246,0247,0250,0251,0252,0205,0210,0267, 0270,0271,0211,0264,0265,0266,0214 X,0261,0262,0263,'0',0177,0,0,0,0, 0,0,0,0,0,0,0,0, X 0,0,0,0,0,0,0,0 X}; X X/* Scan codes to ASCII for shifted keys */ XPUBLIC char sh[NR_SCAN_CODES] = { X 0,033,'!','@','#','$','%','^', '&','*','(',')','_','+','\b','\t', X 'Q','W','E','R','T','Y','U','I', 'O','P','{','}',015,0202,'A','S', X 'D','F','G','H','J','K','L',':', 042,'~',0200,'|','Z','X','C','V', X 'B','N','M','<','>','?',0201,'*', 0203,' ',0204,0221,0222,0223,0224,0225, X 0226,0227,0230,0231,0232,0204,0213,'7', '8','9',0211,'4','5','6',0214,'1', X '2','3','0','.',0,0,0,0, 0,0,0,0,0,0,0,0, X 0,0,0,0,0,0,0,0 X}; X X/* Scan codes to ASCII for Olivetti M24 for unshifted keys. */ XPUBLIC char unm24[NR_SCAN_CODES] = { X 0,033,'1','2','3','4','5','6', '7','8','9','0','-','^','\b','\t', X 'q','w','e','r','t','y','u','i', 'o','p','@','[','\r',0202,'a','s', X 'd','f','g','h','j','k','l',';', ':',']',0200,'\\','z','x','c','v', X 'b','n','m',',','.','/',0201,'*', 0203,' ',0204,0241,0242,0243,0244,0245, X0246,0247,0250,0251,0252,023,0210,0267,0270,0271,0211,0264,0265,0266,0214,0261, X0262,0263,'0','.',' ',014,0212,'\r', 0264,0262,0266,0270,032,0213,' ','/', X0253,0254,0255,0256,0257,0215,0216,0217 X}; X X/* Scan codes to ASCII for Olivetti M24 for shifted keys. */ XPUBLIC char m24[NR_SCAN_CODES] = { X 0,033,'!','"','#','$','%','&', 047,'(',')','_','=','~','\b','\t', X 'Q','W','E','R' ,'T','Y','U','I', 'O','P',0140,'{','\r',0202,'A','S', X 'D','F','G','H','J','K','L','+', '*','}',0200,'|','Z','X','C','V', X 'B','N','M','<','>','?',0201,'*', 0203,' ',0204,0221,0222,0223,0224,0225, X 0226,0227,0230,0231,0232,0270,023,'7', '8','9',0211,'4','5','6',0214,'1', X '2','3',0207,0177,0271,014,0272,'\r', '\b','\n','\f',036,032,0273,0274,'/', X 0233,0234,0235,0236,0237,0275,0276,0277 X}; X XPUBLIC char dutch_unsh[NR_SCAN_CODES] = { X 0,033,'1','2','3','4','5','6', '7','8','9','0','/',0370,'\b','\t', X 'q','w','e','r','t','y','u','i', 'o','p',0,'*','\r',0202,'a','s', X 'd','f','g','h','j','k','l','+', '\'',0100,0200,'<','z','x','c','v', X 'b','n','m',',','.','-',0201,'*', 0203,' ',0204,0,0,0,0,0, X 0,0,0,0,0,0205,0,183, 184,185,137,180,'5',182,140,177, X 178,179,0,0177,0,0,']','/',0, 0,0,0,0,0,0,0,0, X 0,0,0,0,0,0,0,0 X}; X XPUBLIC char dutch_sh[NR_SCAN_CODES] = { X 0,033,'!','\"','#','$','%','&', '_','(',')','\'','?',0176,'\b','\t', X 'Q','W','E','R','T','Y','U','I', 'O','P','^','|','\r',0202,'A','S', X 'D','F','G','H','J','K','L',0361, 0,025,0200,'>','Z','X','C','V', X 'B','N','M',';',':','=',0201,'*', 0203,' ',0204,0,0,0,0,0, X 0,0,0,0,0,0205,0,'7', '8','9',137,'4','5','6',140,'1', X '2','3','0',',',0,0,'[','/',0, 0,0,0,0,0,0,0,0, X 0,0,0,0,0,0,0,0 X}; X X/* Code table for alt key */ XPUBLIC char dutch_alt[NR_SCAN_CODES] = { X 0,0,0,253,0,172,171,0, 156,'{','}',0,'\\',0,0,0, X 0,0,0,0,0,0,0,0, 0,0,0,0,0,0202,0,0, X 0,0,0,0,0,0,0,0, 0,170,0200,0,174,175,0,0, X 0,0,0,0,0,0,0201,0, 0203,0,0204,0,0,0,0,0, X 0,0,0,0,0,0205,0,0, 0,0,0,0,0,0,0,0, X 0,0,0,0177,0,0,'|',0,0, 0,0,0,0,0,0,0,0, X 0,0,0,0,0,0,0,0 X}; X X X/* Unshifted U.S. extended kbd */ XPUBLIC char unsh_usx[NR_SCAN_CODES] = { X 0,'`','1','2','3','4','5','6', '7','8','9','0','-','=','\b','\t', X 'q','w','e','r','t','y','u','i', 'o','p','[',']',015,0202,'a','s', X 'd','f','g','h','j','k','l',';', 047,033,0200,0134,'z','x','c','v', X 'b','n','m',',','.','/',0201,'*', 0203,' ',0202,0241,0242,0243,0244,0245, X 0246,0247,0250,0251,0252,0205,0210,0267, 0270,0271,0211,0264,0265,0266,0214 X,0261,0262,0263,'0',0177,0,0,0,0, 0,0,0,0,0,0,0,0, X0,0,0,0,0,0,0,0 X}; X X/* Shifted U.S. extended kbd */ XPUBLIC char sh_usx[NR_SCAN_CODES] = { X 0,033,'!','@','#','$','%','^', '&','*','(',')','_','+','\b','\t', X 'Q','W','E','R','T','Y','U','I', 'O','P','{','}',015,0202,'A','S', X 'D','F','G','H','J','K','L',':', 042,'~',0200,'|','Z','X','C','V', X 'B','N','M','<','>','?',0201,'*', 0203,' ',0202,0221,0222,0223,0224,0225, X 0226,0227,0230,0231,0232,0204,0213,'7', '8','9',0211,'4','5','6',0214,'1', X '2','3','0','.',0,0,0,0, 0,0,0,0,0,0,0,0, X 0,0,0,0,0,0,0,0 X}; X XPUBLIC char scode_map[] = X {'H', 'A', 'V', 'S', 'D', 'G', 'C', 'T', 'Y', 'B', 'U'}; + END-OF-FILE ttymaps.h.new chmod 'u=rw,g=r,o=r' 'ttymaps.h.new' set `wc -c 'ttymaps.h.new'` count=$1 case $count in 4708) :;; *) echo 'Bad character count in ''ttymaps.h.new' >&2 echo 'Count should be 4708' >&2 esac exit 0