Re: RED State Exception on E3500
Julian Coleman <[email protected]>
| Newsgroups | gmane.os.netbsd.ports.sparc64 |
|---|---|
| Message-ID | <[email protected]> |
Hi,
> Do we need to do something special to handle these?
I tried disabling the instruction and data caches with the attached patch,
but still get RED State Exceptions. Maybe the patch doesn't actually
disable the caches?
Thanks,
J
--
My other computer also runs NetBSD / Sailing at Newbiggin
http://www.netbsd.org/ / http://www.newbigginsailingclub.org/
no-cache-diffs.text
(text/plain, 2.1 KB)
Index: src/sys/arch/sparc64/sparc64/cache.h
===================================================================
RCS file: /cvsroot/src/sys/arch/sparc64/sparc64/cache.h,v
retrieving revision 1.22
diff -u -r1.22 cache.h
--- src/sys/arch/sparc64/sparc64/cache.h 6 Jun 2011 02:49:39 -0000 1.22
+++ src/sys/arch/sparc64/sparc64/cache.h 5 Sep 2011 13:42:01 -0000
@@ -96,6 +96,7 @@
void sp_blast_dcache(int, int); /* Clear entire D$ */
void blast_icache_us(void); /* Clear entire I$ */
void blast_icache_usiii(void); /* Clear entire I$ */
+void disable_cache(void); /* Disable I$ and D$ */
/* The following flush a range from the D$ and I$ but not E$. */
void cache_flush_phys_us(paddr_t, psize_t, int);
Index: src/sys/arch/sparc64/sparc64/cpu.c
===================================================================
RCS file: /cvsroot/src/sys/arch/sparc64/sparc64/cpu.c,v
retrieving revision 1.100
diff -u -r1.100 cpu.c
--- src/sys/arch/sparc64/sparc64/cpu.c 12 Jul 2011 07:51:34 -0000 1.100
+++ src/sys/arch/sparc64/sparc64/cpu.c 5 Sep 2011 13:42:01 -0000
@@ -267,6 +267,7 @@
* For other cpus, we need to call mi_cpu_attach()
* and complete setting up cpcb.
*/
+ disable_cache();
if (ci->ci_flags & CPUF_PRIMARY) {
fpstate_cache = pool_cache_init(sizeof(struct fpstate64),
SPARC64_BLOCK_SIZE, 0, 0, "fpstate",
Index: src/sys/arch/sparc64/sparc64/locore.s
===================================================================
RCS file: /cvsroot/src/sys/arch/sparc64/sparc64/locore.s,v
retrieving revision 1.338
diff -u -r1.338 locore.s
--- src/sys/arch/sparc64/sparc64/locore.s 4 Sep 2011 12:17:13 -0000 1.338
+++ src/sys/arch/sparc64/sparc64/locore.s 5 Sep 2011 13:42:05 -0000
@@ -6241,3 +6241,19 @@
.comm _C_LABEL(trapdebug), 4
.comm _C_LABEL(pmapdebug), 4
#endif
+
+ENTRY(disable_cache)
+ rdpr %pstate, %o3
+ andn %o3, PSTATE_IE, %o4 ! Turn off PSTATE_IE bit
+ wrpr %o4, 0, %pstate
+ ldxa [%g0] ASI_MCCR, %o5
+ andn %o5, MCCR_ICACHE_EN|MCCR_DCACHE_EN, %o4
+ andn %o5, MCCR_DCACHE_EN, %o4
+1:
+ stxa %o4, [%g0] ASI_MCCR
+ sethi %hi(KERNBASE), %o5
+ flush %o5
+ retl
+ wrpr %o3, %pstate