1.1 --- a/tools/internal/xi_read_console_ring.c	Thu Nov 13 01:46:28 2003 +0000
     1.2 +++ b/tools/internal/xi_read_console_ring.c	Thu Nov 13 12:25:31 2003 +0000
     1.3 @@ -4,10 +4,12 @@
     1.4  
     1.5  #include "dom0_defs.h"
     1.6  
     1.7 -#define CONSOLE_RING_SIZE 16392
     1.8 +#define CONSOLE_RING_SIZE	16392
     1.9 +#define CONSOLE_RING_CLEAR	1
    1.10 +
    1.11  static char *argv0 = "read_console_ring";
    1.12  
    1.13 -static long read_console_ring(unsigned long str, unsigned count)
    1.14 +static long read_console_ring(unsigned long str, unsigned count, unsigned int cmd)
    1.15  {
    1.16      int ret;
    1.17      dom0_op_t op;
    1.18 @@ -15,6 +17,7 @@ static long read_console_ring(unsigned l
    1.19      op.cmd = DOM0_READCONSOLE;
    1.20      op.u.readconsole.str = str;
    1.21      op.u.readconsole.count = count;
    1.22 +    op.u.readconsole.cmd = cmd;
    1.23  
    1.24      ret = do_dom0_op(&op);
    1.25      if (ret > 0) {
    1.26 @@ -26,22 +29,32 @@ static long read_console_ring(unsigned l
    1.27  
    1.28  int main(int argc, char **argv)
    1.29  {
    1.30 -    char str[CONSOLE_RING_SIZE];
    1.31 -
    1.32 +    char str[CONSOLE_RING_SIZE+1];
    1.33 +    unsigned int cmd = 0;
    1.34 +    
    1.35      if ( argv[0] != NULL ) 
    1.36          argv0 = argv[0];
    1.37      
    1.38 -    if ( argc > 2) {
    1.39 -        fprintf(stderr, "Usage: %s [-r]\n", argv0);
    1.40 +    if ( argc > 2 || (argc == 2 && strcmp(argv[1], "-c")) ) {
    1.41 +        fprintf(stderr, "Usage: %s [-c]\n", argv0);
    1.42 +        return 1;
    1.43 +    }
    1.44 +
    1.45 +    if ( argc == 2) {
    1.46 +	cmd |= CONSOLE_RING_CLEAR;
    1.47 +    }
    1.48 +    
    1.49 +    if ( mlock(str, CONSOLE_RING_SIZE+1) != 0) {
    1.50 +        PERROR("Could not lock memory for user space read console ring buffer");
    1.51          return 1;
    1.52      }
    1.53      
    1.54 -    if ( read_console_ring((unsigned long)str, CONSOLE_RING_SIZE) < 0 ) {
    1.55 +    if ( read_console_ring((unsigned long)str, CONSOLE_RING_SIZE, cmd) < 0 ) {
    1.56  	printf("Read console ring error.\n");
    1.57 -	printf("%s", str);
    1.58          return 1;
    1.59      }
    1.60  
    1.61      printf("%s", str);
    1.62 +	
    1.63      return 0;
    1.64  }

     2.1 --- a/xen/common/console.c	Thu Nov 13 01:46:28 2003 +0000
     2.2 +++ b/xen/common/console.c	Thu Nov 13 12:25:31 2003 +0000
     2.3 @@ -12,19 +12,18 @@ console_ring_t console_ring = {
     2.4      .len = 0
     2.5  };
     2.6  
     2.7 -void init_console_ring()
     2.8 -{
     2.9 -    console_ring.len = 0;
    2.10 -}
    2.11 -
    2.12 -long read_console_ring(unsigned long str, unsigned int count)
    2.13 +long read_console_ring(unsigned long str, unsigned int count, unsigned cmd)
    2.14  {
    2.15      unsigned int len;
    2.16      
    2.17 -    len = (console_ring.len < count)? console_ring.len : count;
    2.18 +    len = (console_ring.len < count) ? console_ring.len : count;
    2.19      
    2.20      if ( copy_to_user((char *)str, console_ring.buf, len) )
    2.21          return -EFAULT;
    2.22  
    2.23 +    if ( cmd & CONSOLE_RING_CLEAR ) {
    2.24 +	console_ring.len = 0;
    2.25 +    }
    2.26 +    
    2.27      return len;
    2.28  }

     3.1 --- a/xen/common/dom0_ops.c	Thu Nov 13 01:46:28 2003 +0000
     3.2 +++ b/xen/common/dom0_ops.c	Thu Nov 13 12:25:31 2003 +0000
     3.3 @@ -415,9 +415,10 @@ long do_dom0_op(dom0_op_t *u_dom0_op)
     3.4      
     3.5      case DOM0_READCONSOLE:
     3.6      {
     3.7 -    	extern long read_console_ring(unsigned long, unsigned int);
     3.8 +    	extern long read_console_ring(unsigned long, unsigned int, unsigned int);
     3.9          ret = read_console_ring(op.u.readconsole.str, 
    3.10 -                         	op.u.readconsole.count); 
    3.11 +                         	op.u.readconsole.count,
    3.12 +				op.u.readconsole.cmd); 
    3.13      }
    3.14      break;    
    3.15  

     4.1 --- a/xen/include/hypervisor-ifs/dom0_ops.h	Thu Nov 13 01:46:28 2003 +0000
     4.2 +++ b/xen/include/hypervisor-ifs/dom0_ops.h	Thu Nov 13 12:25:31 2003 +0000
     4.3 @@ -194,6 +194,7 @@ typedef struct dom0_readconsole_st
     4.4  {
     4.5      unsigned long str;
     4.6      unsigned int count;
     4.7 +    unsigned int cmd;
     4.8  } dom0_readconsole_t;
     4.9  
    4.10  typedef struct dom0_op_st

     5.1 --- a/xen/include/xeno/console.h	Thu Nov 13 01:46:28 2003 +0000
     5.2 +++ b/xen/include/xeno/console.h	Thu Nov 13 12:25:31 2003 +0000
     5.3 @@ -6,6 +6,9 @@
     5.4   * Copyright (c) 2003 James Scott, Intel Research Cambridge
     5.5   */
     5.6  
     5.7 +#ifndef __CONSOLE_H__
     5.8 +#define __CONSOLE_H__
     5.9 +
    5.10  /*
    5.11   * Ownership of console --- currently hardwired to dom0. This is used to see 
    5.12   * who gets the PS/2 keyboard/mouse events
    5.13 @@ -43,7 +46,8 @@
    5.14  
    5.15  extern int opt_console;
    5.16  
    5.17 -#define CONSOLE_RING_SIZE     16392
    5.18 +#define CONSOLE_RING_SIZE	16392
    5.19 +#define CONSOLE_RING_CLEAR	1
    5.20  
    5.21  typedef struct console_ring_st
    5.22  {
    5.23 @@ -53,5 +57,6 @@ typedef struct console_ring_st
    5.24  
    5.25  extern console_ring_t console_ring;
    5.26  
    5.27 -void init_console_ring();
    5.28 -long read_console_ring(unsigned long, unsigned int);
    5.29 +long read_console_ring(unsigned long, unsigned int, unsigned int);
    5.30 +
    5.31 +#endif