diff options
Diffstat (limited to 'arch/ia64')
| -rw-r--r-- | arch/ia64/include/asm/mca.h | 1 | ||||
| -rw-r--r-- | arch/ia64/kernel/crash.c | 4 | ||||
| -rw-r--r-- | arch/ia64/kernel/head.S | 2 | ||||
| -rw-r--r-- | arch/ia64/kernel/mca_asm.S | 27 |
4 files changed, 33 insertions, 1 deletions
diff --git a/arch/ia64/include/asm/mca.h b/arch/ia64/include/asm/mca.h index 44a0b53df900..cb0952f51836 100644 --- a/arch/ia64/include/asm/mca.h +++ b/arch/ia64/include/asm/mca.h @@ -151,6 +151,7 @@ extern void ia64_mca_cmc_vector_setup(void); extern int ia64_reg_MCA_extension(int (*fn)(void *, struct ia64_sal_os_state *)); extern void ia64_unreg_MCA_extension(void); extern unsigned long ia64_get_rnat(unsigned long *); +extern void ia64_set_psr_mc(void); extern void ia64_mca_printk(const char * fmt, ...) __attribute__ ((format (printf, 1, 2))); diff --git a/arch/ia64/kernel/crash.c b/arch/ia64/kernel/crash.c index f065093f8e9b..3f3a5797d198 100644 --- a/arch/ia64/kernel/crash.c +++ b/arch/ia64/kernel/crash.c @@ -129,10 +129,14 @@ void kdump_cpu_freeze(struct unw_frame_info *info, void *arg) { int cpuid; + local_irq_disable(); cpuid = smp_processor_id(); crash_save_this_cpu(); current->thread.ksp = (__u64)info->sw - 16; + + ia64_set_psr_mc(); /* mask MCA/INIT and stop reentrance */ + atomic_inc(&kdump_cpu_frozen); kdump_status[cpuid] = 1; mb(); diff --git a/arch/ia64/kernel/head.S b/arch/ia64/kernel/head.S index 23f846de62d5..e1f97ac9eefd 100644 --- a/arch/ia64/kernel/head.S +++ b/arch/ia64/kernel/head.S @@ -1242,7 +1242,7 @@ GLOBAL_ENTRY(ia64_jump_to_sal) movl r16=SAL_PSR_BITS_TO_SET;; mov cr.ipsr=r16 mov cr.ifs=r0;; - rfi;; + rfi;; // note: this unmask MCA/INIT (psr.mc) 1: /* * Invalidate all TLB data/inst diff --git a/arch/ia64/kernel/mca_asm.S b/arch/ia64/kernel/mca_asm.S index a06d46548ff9..8d2eabe3119f 100644 --- a/arch/ia64/kernel/mca_asm.S +++ b/arch/ia64/kernel/mca_asm.S @@ -1073,3 +1073,30 @@ GLOBAL_ENTRY(ia64_get_rnat) mov ar.rsc=3 br.ret.sptk.many rp END(ia64_get_rnat) + + +// void ia64_set_psr_mc(void) +// +// Set psr.mc bit to mask MCA/INIT. +GLOBAL_ENTRY(ia64_set_psr_mc) + rsm psr.i | psr.ic // disable interrupts + ;; + srlz.d + ;; + mov r14 = psr // get psr{36:35,31:0} + movl r15 = 1f + ;; + dep r14 = -1, r14, PSR_MC, 1 // set psr.mc + ;; + dep r14 = -1, r14, PSR_IC, 1 // set psr.ic + ;; + dep r14 = -1, r14, PSR_BN, 1 // keep bank1 in use + ;; + mov cr.ipsr = r14 + mov cr.ifs = r0 + mov cr.iip = r15 + ;; + rfi +1: + br.ret.sptk.many rp +END(ia64_set_psr_mc) |
