[L4alpha-cvscommit] CVS: L4Alpha/pal/21164 l4_pal.mar,1.11,1.12

[Daniel P. <dp...@us...>]

Update of /cvsroot/l4alpha/L4Alpha/pal/21164
In directory usw-pr-cvs1:/tmp/cvs-serv14643/pal/21164

Modified Files:
	l4_pal.mar 
Log Message:
This patch adds support for read-only mappings on the 21164; specifically it adds a handler for writes faulting on a read-only page. Tested.

Further more, it is possible to revoke a mapping from read-write back to read-only via an explicit fpage ipc.



Index: l4_pal.mar
===================================================================
RCS file: /cvsroot/l4alpha/L4Alpha/pal/21164/l4_pal.mar,v
retrieving revision 1.11
retrieving revision 1.12
diff -C2 -d -r1.11 -r1.12
*** l4_pal.mar	7 Feb 2002 07:30:08 -0000	1.11
--- l4_pal.mar	11 Feb 2002 00:00:04 -0000	1.12
***************
*** 1361,1397 ****
  	open_frame
  
! 	push	p_r0!p_r1!p_r2
! 	
! 	ldq_p	r0, ^x60(zero)
! 	addq	r0, #1, r0
! 	stq_p	r0, ^x60(zero)
! 	tcb	r1
! 	stq_p	r1, ^x68(zero)
  
! 	nop
! 	nop
  
! 	mfpr	r0, va
! 	mfpr	r1, excAddr
! 	mfpr	r2, mmStat
  
! 	kmsg	<"Invalid access ^x105">
! 	debug
! 	NOP
! 	NOP
! 	NOP
! 	pop	p_r0!p_r1!p_r2
! 	
! 	close_frame
! 		
! 	NOP
! 	NOP
! 	push	p_r1
! 	mfpr	r0, va
! 	mfpr	r1, excAddr
! 	mfpr	r2, mmStat
! 	debug
  	
! 	syshalt ^x6666	
  
  	
--- 1361,1381 ----
  	open_frame
  
! 	mfpr	p3, va
  
! 	push	p_pp0!p_pp1
! 	push	p_a0!p_a1!p_a2!p_AT!p_gp
! 		
! 	xtb_flush_entry p3, a0
  
! 	ldq_a	a1, ^x38(sp)
  
! 	mov	p3, a0				; faulting address
  	
! 						; Since we're going straight to kernel, we don't need
! 						; to reload px registers
! 	mfpr	a2, mmStat
! 
! 	pf_stack
! 	kernel	l4_dtb_protection_fault