[linuxsh-dev] Re: System reset while INIT processing

[SUGIOKA T. <su...@it...>]

At 11:18 01/07/13 +0900, Masahiro Abe <m-...@aa...> wrote:
>Some more reports.
>- calling sequence until reboot is
>  copy_user_page(arch/sh/mm/cache.c)
>    +-update_mmu_cache(arch/sh/mm/fault.c)
>    +-copy_page : #defined as memcpy(arch/sh/lib/memcpy.S)
>  Last two functions are called at line 588 and 589 of cache.c,
>  respectively.
>- most of the time, exception occurs at line 86 of memcpy.S, which is
>	mov.l	r1,@-r0
>  at this time, @r0=0xc0002ffc
>- TEA has 0xc0002ffc at the time of exception/reboot. So, this is
>  multiple data TLB hit exception.
>- 0xc0002ffc is within the area that p3_cache_init allocated with
>  remap_area_pages. This area is from 0xc0000000 to 0xc0003fff.

Does this patch change your situation ?

Index: arch/sh/mm/cache.c
===================================================================
RCS file: /cvsroot/linuxsh/kernel/arch/sh/mm/cache.c,v
retrieving revision 1.41
diff -u -r1.41 cache.c
--- arch/sh/mm/cache.c	2001/07/12 06:27:37	1.41
+++ arch/sh/mm/cache.c	2001/07/13 04:21:45
@@ -18,6 +18,7 @@
 #include <asm/cache.h>
 #include <asm/io.h>
 #include <asm/uaccess.h>
+#include <asm/mmu_context.h>
 
 #if defined(__sh3__)
 #define CCR		0xffffffec	/* Address of Cache Control Register */
@@ -519,6 +520,8 @@
 /* Page is 4K, OC size is 16K, there are four lines. */
 #define CACHE_ALIAS 0x00003000
 
+extern void __flush_tlb_page(unsigned long asid, unsigned long page);
+
 /*
  * clear_user_page
  * @to: P1 address
@@ -548,6 +551,7 @@
 		save_and_cli(flags);
 		entry = mk_pte_phys(phys_addr, pgprot);
 		set_pte(pte, entry);
+		__flush_tlb_page(get_asid(), p3_addr&PAGE_MASK);
 		update_mmu_cache(NULL, p3_addr, entry);
 		clear_page((void *)p3_addr);
 		restore_flags(flags);
@@ -585,6 +589,7 @@
 		save_and_cli(flags);
 		entry = mk_pte_phys(phys_addr, pgprot);
 		set_pte(pte, entry);
+		__flush_tlb_page(get_asid(), p3_addr&PAGE_MASK);
 		update_mmu_cache(NULL, p3_addr, entry);
 		copy_page((void *)p3_addr, from);
 		restore_flags(flags);
Index: arch/sh/mm/fault.c
===================================================================
RCS file: /cvsroot/linuxsh/kernel/arch/sh/mm/fault.c,v
retrieving revision 1.40
diff -u -r1.40 fault.c
--- arch/sh/mm/fault.c	2001/07/06 13:11:32	1.40
+++ arch/sh/mm/fault.c	2001/07/13 04:21:46
@@ -28,7 +28,7 @@
 #include <asm/mmu_context.h>
 
 extern void die(const char *,struct pt_regs *,long);
-static void __flush_tlb_page(unsigned long asid, unsigned long page);
+void __flush_tlb_page(unsigned long asid, unsigned long page);
 
 /*
  * Ugly, ugly, but the goto's result in better assembly..
@@ -322,7 +322,7 @@
 	restore_flags(flags);
 }
 
-static void __flush_tlb_page(unsigned long asid, unsigned long page)
+void __flush_tlb_page(unsigned long asid, unsigned long page)
 {
 	unsigned long addr, data;
 

----
SUGIOKA Toshinobu