[PATCH]: Fix dcache.c:dcache_write_line()

[jtc at redback dot com (J.T. Conklin)]

With many thanks to Frank Ch. Eigler who discovered the problem, this
patch fixes a bug in dcache.c:dcache_write_line() where the cache was
not written to the target correctly.  

Frank reported that cached memory was being written to the target one
byte at a time and suspected the memory region attribute subsystem.
It turned out to be worse than that.

        --jtc

2001-04-06  J.T. Conklin  <jtc@redback.com> 
 
        * dcache.c (dcache_write_line): Fixed bugs where cache line was 
        not written to target correctly. 

Index: dcache.c
===================================================================
RCS file: /cvs/src/src/gdb/dcache.c,v
retrieving revision 1.14
diff -c -r1.14 dcache.c
*** dcache.c	2001/03/06 08:21:06	1.14
--- dcache.c	2001/04/06 22:32:02
***************
*** 278,297 ****
        while (reg_len > 0)
  	{
  	  s = XFORM(memaddr);
! 	  do {
  	    if (db->state[s] == ENTRY_DIRTY)
  	      break;
  	    s++;
  	    reg_len--;
- 	  } while (reg_len > 0);
  
  	  e = s;
! 	  do {
  	    if (db->state[e] != ENTRY_DIRTY)
  	      break;
  	    e++;
  	    reg_len--;
! 	  } while (reg_len > 0);
  
  	  dirty_len = e - s;
  	  while (dirty_len > 0)
--- 278,301 ----
        while (reg_len > 0)
  	{
  	  s = XFORM(memaddr);
! 	  while (reg_len > 0) {
  	    if (db->state[s] == ENTRY_DIRTY)
  	      break;
  	    s++;
  	    reg_len--;
  
+ 	    memaddr++;
+ 	    myaddr++;
+ 	    len--;
+ 	  }
+ 
  	  e = s;
! 	  while (reg_len > 0) {
  	    if (db->state[e] != ENTRY_DIRTY)
  	      break;
  	    e++;
  	    reg_len--;
! 	  }
  
  	  dirty_len = e - s;
  	  while (dirty_len > 0)
***************
*** 304,309 ****
--- 308,314 ----
  	      memset (&db->state[XFORM(memaddr)], ENTRY_OK, res);
  	      memaddr   += res;
  	      myaddr    += res;
+ 	      len       -= res;
  	      dirty_len -= res;
  	    }
  	}


-- 
J.T. Conklin
RedBack Networks