linux-mips-commits

[James S. <jsi...@us...>]

Update of /cvsroot/linux-mips/linux/arch/mips/kernel
In directory usw-pr-cvs1:/tmp/cvs-serv19122

Modified Files:
	traps.c 
Log Message:
Support catching data bus errors also from withim modules.

Index: traps.c
===================================================================
RCS file: /cvsroot/linux-mips/linux/arch/mips/kernel/traps.c,v
retrieving revision 1.10
retrieving revision 1.11
diff -C2 -d -r1.10 -r1.11
*** traps.c	2001/08/18 18:04:54	1.10
--- traps.c	2001/08/21 17:25:35	1.11
***************
*** 15,18 ****
--- 15,19 ----
  #include <linux/init.h>
  #include <linux/mm.h>
+ #include <linux/module.h>
  #include <linux/sched.h>
  #include <linux/smp.h>
***************
*** 26,29 ****
--- 27,31 ----
  #include <asm/inst.h>
  #include <asm/jazz.h>
+ #include <asm/module.h>
  #include <asm/pgtable.h>
  #include <asm/io.h>
***************
*** 246,261 ****
  }
  
! #define search_dbe_table(addr)	\
! 	search_one_table(__start___dbe_table, __stop___dbe_table - 1, (addr))
  
  static void default_be_board_handler(struct pt_regs *regs)
  {
  	unsigned long new_epc;
! 	unsigned long fixup = search_dbe_table(regs->cp0_epc);
  
! 	if (fixup) {
! 		new_epc = fixup_exception(dpf_reg, fixup, regs->cp0_epc);
! 		regs->cp0_epc = new_epc;
! 		return;
  	}
  
--- 248,303 ----
  }
  
! extern spinlock_t modlist_lock;
! 
! static inline unsigned long
! search_dbe_table(unsigned long addr)
! {
! 	unsigned long ret = 0;
! 
! #ifndef CONFIG_MODULES
! 	/* There is only the kernel to search.  */
! 	ret = search_one_table(__start___dbe_table, __stop___dbe_table-1, addr);
! 	return ret;
! #else
! 	unsigned long flags;
! 
! 	/* The kernel is the last "module" -- no need to treat it special.  */
! 	struct module *mp;
! 	struct archdata *ap;
! 
! 	spin_lock_irqsave(&modlist_lock, flags);
! 	for (mp = module_list; mp != NULL; mp = mp->next) {
! 		if (!mod_member_present(mp, archdata_start) ||
! 		    !mp->archdata_start)
! 			continue;
! 		ap = (struct archdata *)(mp->archdata_start);
! 
! 		if (ap->dbe_table_start == NULL ||
! 		    !(mp->flags & (MOD_RUNNING | MOD_INITIALIZING)))
! 			continue;
! 		ret = search_one_table(ap->dbe_table_start,
! 				       ap->dbe_table_end - 1, addr);
! 		if (ret)
! 			break;
! 	}
! 	spin_unlock_irqrestore(&modlist_lock, flags);
! 	return ret;
! #endif
! }
  
  static void default_be_board_handler(struct pt_regs *regs)
  {
  	unsigned long new_epc;
! 	unsigned long fixup;
! 	int data = regs->cp0_cause & 4;
  
! 	if (data && !user_mode(regs)) {
! 		fixup = search_dbe_table(regs->cp0_epc);
! 		if (fixup) {
! 			new_epc = fixup_exception(dpf_reg, fixup,
! 						  regs->cp0_epc);
! 			regs->cp0_epc = new_epc;
! 			return;
! 		}
  	}
  
***************
*** 263,266 ****
--- 305,312 ----
  	 * Assume it would be too dangerous to continue ...
  	 */
+ 	printk(KERN_ALERT "%s bus error, epc == %08lx, ra == %08lx\n",
+ 	       data ? "Data" : "Instruction",
+ 	       regs->cp0_epc, regs->regs[31]);
+ 	die_if_kernel("Oops", regs);
  	force_sig(SIGBUS, current);
  }
***************
*** 738,742 ****
  void __init trap_init(void)
  {
! 	extern char except_vec0_nevada, except_vec0_r4000, except_vec0_vr41xx;
  	extern char except_vec0_r4600, except_vec0_r2300;
  	extern char except_vec1_generic, except_vec2_generic;
--- 784,788 ----
  void __init trap_init(void)
  {
! 	extern char except_vec0_nevada, except_vec0_r4000;
  	extern char except_vec0_r4600, except_vec0_r2300;
  	extern char except_vec1_generic, except_vec2_generic;