* [TRIVAL] Critical interrupt handling for PPC44x
@ 2003-10-25 10:31 Takeharu KATO
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From: Takeharu KATO @ 2003-10-25 10:31 UTC (permalink / raw)
To: linuxppc-dev
[-- Attachment #1: Type: text/plain, Size: 336 bytes --]
Dear all:
I fixed ``ret_from_crit_exc'' in arch/ppc/kernel/entry.S for PPC44x.
In PPC44x return from interruption with CSRR0/CSRR1 instead of SRR2/SRR3.
But I do not have PPC44x board so, I did not test this code on a real
machine.
Please test this code.
--
-----------------------------------
Takeharu KATO
Mail: tk1219@alles•or.jp
[-- Attachment #2: crit-fix.patch --]
[-- Type: text/x-diff, Size: 1430 bytes --]
diff -Nacr linux-2.6.0-test8-original/arch/ppc/kernel/entry.S linux-2.6.0-test8/arch/ppc/kernel/entry.S
*** linux-2.6.0-test8-original/arch/ppc/kernel/entry.S 2003-10-24 23:58:30.000000000 +0900
--- linux-2.6.0-test8/arch/ppc/kernel/entry.S 2003-10-25 19:15:47.678618416 +0900
***************
*** 689,696 ****
--- 689,701 ----
mtspr SPRN_ESR,r10
lwz r11,_NIP(r1)
lwz r12,_MSR(r1)
+ #if defined(CONFIG_44x)
+ mtspr CSRR0,r11
+ mtspr CSRR1,r12
+ #else
mtspr SRR2,r11
mtspr SRR3,r12
+ #endif
lwz r9,GPR9(r1)
lwz r12,GPR12(r1)
lwz r10,crit_sprg0@l(0)
diff -Nacr linux-2.6.0-test8-original/arch/ppc/kernel/ppc_ksyms.c linux-2.6.0-test8/arch/ppc/kernel/ppc_ksyms.c
*** linux-2.6.0-test8-original/arch/ppc/kernel/ppc_ksyms.c 2003-10-24 23:58:40.000000000 +0900
--- linux-2.6.0-test8/arch/ppc/kernel/ppc_ksyms.c 2003-10-25 19:17:24.102959688 +0900
***************
*** 365,370 ****
--- 365,371 ----
EXPORT_SYMBOL(next_mmu_context);
EXPORT_SYMBOL(set_context);
+ #if defined(CONFIG_PPC_MULTIPLATFORM)
EXPORT_SYMBOL(handle_mm_fault); /* For MOL */
EXPORT_SYMBOL_NOVERS(disarm_decr);
extern long mol_trampoline;
***************
*** 375,380 ****
--- 376,382 ----
extern int mmu_hash_lock;
EXPORT_SYMBOL(mmu_hash_lock); /* For MOL */
#endif /* CONFIG_SMP */
+ #endif /* CONFIG_PPC_MULTIPLATFORM */
extern long *intercept_table;
EXPORT_SYMBOL(intercept_table);
#endif /* CONFIG_PPC_STD_MMU */
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