diff options
Diffstat (limited to 'arch/ia64/kernel/mca.c')
| -rw-r--r-- | arch/ia64/kernel/mca.c | 1470 |
1 files changed, 1470 insertions, 0 deletions
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c new file mode 100644 index 0000000..4d6c7b8f --- /dev/null +++ b/arch/ia64/kernel/mca.c @@ -0,0 +1,1470 @@ +/* + * File: mca.c + * Purpose: Generic MCA handling layer + * + * Updated for latest kernel + * Copyright (C) 2003 Hewlett-Packard Co + * David Mosberger-Tang <davidm@hpl.hp.com> + * + * Copyright (C) 2002 Dell Inc. + * Copyright (C) Matt Domsch (Matt_Domsch@dell.com) + * + * Copyright (C) 2002 Intel + * Copyright (C) Jenna Hall (jenna.s.hall@intel.com) + * + * Copyright (C) 2001 Intel + * Copyright (C) Fred Lewis (frederick.v.lewis@intel.com) + * + * Copyright (C) 2000 Intel + * Copyright (C) Chuck Fleckenstein (cfleck@co.intel.com) + * + * Copyright (C) 1999, 2004 Silicon Graphics, Inc. + * Copyright (C) Vijay Chander(vijay@engr.sgi.com) + * + * 03/04/15 D. Mosberger Added INIT backtrace support. + * 02/03/25 M. Domsch GUID cleanups + * + * 02/01/04 J. Hall Aligned MCA stack to 16 bytes, added platform vs. CPU + * error flag, set SAL default return values, changed + * error record structure to linked list, added init call + * to sal_get_state_info_size(). + * + * 01/01/03 F. Lewis Added setup of CMCI and CPEI IRQs, logging of corrected + * platform errors, completed code for logging of + * corrected & uncorrected machine check errors, and + * updated for conformance with Nov. 2000 revision of the + * SAL 3.0 spec. + * 00/03/29 C. Fleckenstein Fixed PAL/SAL update issues, began MCA bug fixes, logging issues, + * added min save state dump, added INIT handler. + * + * 2003-12-08 Keith Owens <kaos@sgi.com> + * smp_call_function() must not be called from interrupt context (can + * deadlock on tasklist_lock). Use keventd to call smp_call_function(). + * + * 2004-02-01 Keith Owens <kaos@sgi.com> + * Avoid deadlock when using printk() for MCA and INIT records. + * Delete all record printing code, moved to salinfo_decode in user space. + * Mark variables and functions static where possible. + * Delete dead variables and functions. + * Reorder to remove the need for forward declarations and to consolidate + * related code. + */ +#include <linux/config.h> +#include <linux/types.h> +#include <linux/init.h> +#include <linux/sched.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/kallsyms.h> +#include <linux/smp_lock.h> +#include <linux/bootmem.h> +#include <linux/acpi.h> +#include <linux/timer.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/smp.h> +#include <linux/workqueue.h> + +#include <asm/delay.h> +#include <asm/machvec.h> +#include <asm/meminit.h> +#include <asm/page.h> +#include <asm/ptrace.h> +#include <asm/system.h> +#include <asm/sal.h> +#include <asm/mca.h> + +#include <asm/irq.h> +#include <asm/hw_irq.h> + +#if defined(IA64_MCA_DEBUG_INFO) +# define IA64_MCA_DEBUG(fmt...) printk(fmt) +#else +# define IA64_MCA_DEBUG(fmt...) +#endif + +/* Used by mca_asm.S */ +ia64_mca_sal_to_os_state_t ia64_sal_to_os_handoff_state; +ia64_mca_os_to_sal_state_t ia64_os_to_sal_handoff_state; +u64 ia64_mca_serialize; +DEFINE_PER_CPU(u64, ia64_mca_data); /* == __per_cpu_mca[smp_processor_id()] */ +DEFINE_PER_CPU(u64, ia64_mca_per_cpu_pte); /* PTE to map per-CPU area */ +DEFINE_PER_CPU(u64, ia64_mca_pal_pte); /* PTE to map PAL code */ +DEFINE_PER_CPU(u64, ia64_mca_pal_base); /* vaddr PAL code granule */ + +unsigned long __per_cpu_mca[NR_CPUS]; + +/* In mca_asm.S */ +extern void ia64_monarch_init_handler (void); +extern void ia64_slave_init_handler (void); + +static ia64_mc_info_t ia64_mc_info; + +#define MAX_CPE_POLL_INTERVAL (15*60*HZ) /* 15 minutes */ +#define MIN_CPE_POLL_INTERVAL (2*60*HZ) /* 2 minutes */ +#define CMC_POLL_INTERVAL (1*60*HZ) /* 1 minute */ +#define CPE_HISTORY_LENGTH 5 +#define CMC_HISTORY_LENGTH 5 + +static struct timer_list cpe_poll_timer; +static struct timer_list cmc_poll_timer; +/* + * This variable tells whether we are currently in polling mode. + * Start with this in the wrong state so we won't play w/ timers + * before the system is ready. + */ +static int cmc_polling_enabled = 1; + +/* + * Clearing this variable prevents CPE polling from getting activated + * in mca_late_init. Use it if your system doesn't provide a CPEI, + * but encounters problems retrieving CPE logs. This should only be + * necessary for debugging. + */ +static int cpe_poll_enabled = 1; + +extern void salinfo_log_wakeup(int type, u8 *buffer, u64 size, int irqsafe); + +static int mca_init; + +/* + * IA64_MCA log support + */ +#define IA64_MAX_LOGS 2 /* Double-buffering for nested MCAs */ +#define IA64_MAX_LOG_TYPES 4 /* MCA, INIT, CMC, CPE */ + +typedef struct ia64_state_log_s +{ + spinlock_t isl_lock; + int isl_index; + unsigned long isl_count; + ia64_err_rec_t *isl_log[IA64_MAX_LOGS]; /* need space to store header + error log */ +} ia64_state_log_t; + +static ia64_state_log_t ia64_state_log[IA64_MAX_LOG_TYPES]; + +#define IA64_LOG_ALLOCATE(it, size) \ + {ia64_state_log[it].isl_log[IA64_LOG_CURR_INDEX(it)] = \ + (ia64_err_rec_t *)alloc_bootmem(size); \ + ia64_state_log[it].isl_log[IA64_LOG_NEXT_INDEX(it)] = \ + (ia64_err_rec_t *)alloc_bootmem(size);} +#define IA64_LOG_LOCK_INIT(it) spin_lock_init(&ia64_state_log[it].isl_lock) +#define IA64_LOG_LOCK(it) spin_lock_irqsave(&ia64_state_log[it].isl_lock, s) +#define IA64_LOG_UNLOCK(it) spin_unlock_irqrestore(&ia64_state_log[it].isl_lock,s) +#define IA64_LOG_NEXT_INDEX(it) ia64_state_log[it].isl_index +#define IA64_LOG_CURR_INDEX(it) 1 - ia64_state_log[it].isl_index +#define IA64_LOG_INDEX_INC(it) \ + {ia64_state_log[it].isl_index = 1 - ia64_state_log[it].isl_index; \ + ia64_state_log[it].isl_count++;} +#define IA64_LOG_INDEX_DEC(it) \ + ia64_state_log[it].isl_index = 1 - ia64_state_log[it].isl_index +#define IA64_LOG_NEXT_BUFFER(it) (void *)((ia64_state_log[it].isl_log[IA64_LOG_NEXT_INDEX(it)])) +#define IA64_LOG_CURR_BUFFER(it) (void *)((ia64_state_log[it].isl_log[IA64_LOG_CURR_INDEX(it)])) +#define IA64_LOG_COUNT(it) ia64_state_log[it].isl_count + +/* + * ia64_log_init + * Reset the OS ia64 log buffer + * Inputs : info_type (SAL_INFO_TYPE_{MCA,INIT,CMC,CPE}) + * Outputs : None + */ +static void +ia64_log_init(int sal_info_type) +{ + u64 max_size = 0; + + IA64_LOG_NEXT_INDEX(sal_info_type) = 0; + IA64_LOG_LOCK_INIT(sal_info_type); + + // SAL will tell us the maximum size of any error record of this type + max_size = ia64_sal_get_state_info_size(sal_info_type); + if (!max_size) + /* alloc_bootmem() doesn't like zero-sized allocations! */ + return; + + // set up OS data structures to hold error info + IA64_LOG_ALLOCATE(sal_info_type, max_size); + memset(IA64_LOG_CURR_BUFFER(sal_info_type), 0, max_size); + memset(IA64_LOG_NEXT_BUFFER(sal_info_type), 0, max_size); +} + +/* + * ia64_log_get + * + * Get the current MCA log from SAL and copy it into the OS log buffer. + * + * Inputs : info_type (SAL_INFO_TYPE_{MCA,INIT,CMC,CPE}) + * irq_safe whether you can use printk at this point + * Outputs : size (total record length) + * *buffer (ptr to error record) + * + */ +static u64 +ia64_log_get(int sal_info_type, u8 **buffer, int irq_safe) +{ + sal_log_record_header_t *log_buffer; + u64 total_len = 0; + int s; + + IA64_LOG_LOCK(sal_info_type); + + /* Get the process state information */ + log_buffer = IA64_LOG_NEXT_BUFFER(sal_info_type); + + total_len = ia64_sal_get_state_info(sal_info_type, (u64 *)log_buffer); + + if (total_len) { + IA64_LOG_INDEX_INC(sal_info_type); + IA64_LOG_UNLOCK(sal_info_type); + if (irq_safe) { + IA64_MCA_DEBUG("%s: SAL error record type %d retrieved. " + "Record length = %ld\n", __FUNCTION__, sal_info_type, total_len); + } + *buffer = (u8 *) log_buffer; + return total_len; + } else { + IA64_LOG_UNLOCK(sal_info_type); + return 0; + } +} + +/* + * ia64_mca_log_sal_error_record + * + * This function retrieves a specified error record type from SAL + * and wakes up any processes waiting for error records. + * + * Inputs : sal_info_type (Type of error record MCA/CMC/CPE/INIT) + */ +static void +ia64_mca_log_sal_error_record(int sal_info_type) +{ + u8 *buffer; + sal_log_record_header_t *rh; + u64 size; + int irq_safe = sal_info_type != SAL_INFO_TYPE_MCA && sal_info_type != SAL_INFO_TYPE_INIT; +#ifdef IA64_MCA_DEBUG_INFO + static const char * const rec_name[] = { "MCA", "INIT", "CMC", "CPE" }; +#endif + + size = ia64_log_get(sal_info_type, &buffer, irq_safe); + if (!size) + return; + + salinfo_log_wakeup(sal_info_type, buffer, size, irq_safe); + + if (irq_safe) + IA64_MCA_DEBUG("CPU %d: SAL log contains %s error record\n", + smp_processor_id(), + sal_info_type < ARRAY_SIZE(rec_name) ? rec_name[sal_info_type] : "UNKNOWN"); + + /* Clear logs from corrected errors in case there's no user-level logger */ + rh = (sal_log_record_header_t *)buffer; + if (rh->severity == sal_log_severity_corrected) + ia64_sal_clear_state_info(sal_info_type); +} + +/* + * platform dependent error handling + */ +#ifndef PLATFORM_MCA_HANDLERS + +#ifdef CONFIG_ACPI + +static int cpe_vector = -1; + +static irqreturn_t +ia64_mca_cpe_int_handler (int cpe_irq, void *arg, struct pt_regs *ptregs) +{ + static unsigned long cpe_history[CPE_HISTORY_LENGTH]; + static int index; + static DEFINE_SPINLOCK(cpe_history_lock); + + IA64_MCA_DEBUG("%s: received interrupt vector = %#x on CPU %d\n", + __FUNCTION__, cpe_irq, smp_processor_id()); + + /* SAL spec states this should run w/ interrupts enabled */ + local_irq_enable(); + + /* Get the CPE error record and log it */ + ia64_mca_log_sal_error_record(SAL_INFO_TYPE_CPE); + + spin_lock(&cpe_history_lock); + if (!cpe_poll_enabled && cpe_vector >= 0) { + + int i, count = 1; /* we know 1 happened now */ + unsigned long now = jiffies; + + for (i = 0; i < CPE_HISTORY_LENGTH; i++) { + if (now - cpe_history[i] <= HZ) + count++; + } + + IA64_MCA_DEBUG(KERN_INFO "CPE threshold %d/%d\n", count, CPE_HISTORY_LENGTH); + if (count >= CPE_HISTORY_LENGTH) { + + cpe_poll_enabled = 1; + spin_unlock(&cpe_history_lock); + disable_irq_nosync(local_vector_to_irq(IA64_CPE_VECTOR)); + + /* + * Corrected errors will still be corrected, but + * make sure there's a log somewhere that indicates + * something is generating more than we can handle. + */ + printk(KERN_WARNING "WARNING: Switching to polling CPE handler; error records may be lost\n"); + + mod_timer(&cpe_poll_timer, jiffies + MIN_CPE_POLL_INTERVAL); + + /* lock already released, get out now */ + return IRQ_HANDLED; + } else { + cpe_history[index++] = now; + if (index == CPE_HISTORY_LENGTH) + index = 0; + } + } + spin_unlock(&cpe_history_lock); + return IRQ_HANDLED; +} + +#endif /* CONFIG_ACPI */ + +static void +show_min_state (pal_min_state_area_t *minstate) +{ + u64 iip = minstate->pmsa_iip + ((struct ia64_psr *)(&minstate->pmsa_ipsr))->ri; + u64 xip = minstate->pmsa_xip + ((struct ia64_psr *)(&minstate->pmsa_xpsr))->ri; + + printk("NaT bits\t%016lx\n", minstate->pmsa_nat_bits); + printk("pr\t\t%016lx\n", minstate->pmsa_pr); + printk("b0\t\t%016lx ", minstate->pmsa_br0); print_symbol("%s\n", minstate->pmsa_br0); + printk("ar.rsc\t\t%016lx\n", minstate->pmsa_rsc); + printk("cr.iip\t\t%016lx ", iip); print_symbol("%s\n", iip); + printk("cr.ipsr\t\t%016lx\n", minstate->pmsa_ipsr); + printk("cr.ifs\t\t%016lx\n", minstate->pmsa_ifs); + printk("xip\t\t%016lx ", xip); print_symbol("%s\n", xip); + printk("xpsr\t\t%016lx\n", minstate->pmsa_xpsr); + printk("xfs\t\t%016lx\n", minstate->pmsa_xfs); + printk("b1\t\t%016lx ", minstate->pmsa_br1); + print_symbol("%s\n", minstate->pmsa_br1); + + printk("\nstatic registers r0-r15:\n"); + printk(" r0- 3 %016lx %016lx %016lx %016lx\n", + 0UL, minstate->pmsa_gr[0], minstate->pmsa_gr[1], minstate->pmsa_gr[2]); + printk(" r4- 7 %016lx %016lx %016lx %016lx\n", + minstate->pmsa_gr[3], minstate->pmsa_gr[4], + minstate->pmsa_gr[5], minstate->pmsa_gr[6]); + printk(" r8-11 %016lx %016lx %016lx %016lx\n", + minstate->pmsa_gr[7], minstate->pmsa_gr[8], + minstate->pmsa_gr[9], minstate->pmsa_gr[10]); + printk("r12-15 %016lx %016lx %016lx %016lx\n", + minstate->pmsa_gr[11], minstate->pmsa_gr[12], + minstate->pmsa_gr[13], minstate->pmsa_gr[14]); + + printk("\nbank 0:\n"); + printk("r16-19 %016lx %016lx %016lx %016lx\n", + minstate->pmsa_bank0_gr[0], minstate->pmsa_bank0_gr[1], + minstate->pmsa_bank0_gr[2], minstate->pmsa_bank0_gr[3]); + printk("r20-23 %016lx %016lx %016lx %016lx\n", + minstate->pmsa_bank0_gr[4], minstate->pmsa_bank0_gr[5], + minstate->pmsa_bank0_gr[6], minstate->pmsa_bank0_gr[7]); + printk("r24-27 %016lx %016lx %016lx %016lx\n", + minstate->pmsa_bank0_gr[8], minstate->pmsa_bank0_gr[9], + minstate->pmsa_bank0_gr[10], minstate->pmsa_bank0_gr[11]); + printk("r28-31 %016lx %016lx %016lx %016lx\n", + minstate->pmsa_bank0_gr[12], minstate->pmsa_bank0_gr[13], + minstate->pmsa_bank0_gr[14], minstate->pmsa_bank0_gr[15]); + + printk("\nbank 1:\n"); + printk("r16-19 %016lx %016lx %016lx %016lx\n", + minstate->pmsa_bank1_gr[0], minstate->pmsa_bank1_gr[1], + minstate->pmsa_bank1_gr[2], minstate->pmsa_bank1_gr[3]); + printk("r20-23 %016lx %016lx %016lx %016lx\n", + minstate->pmsa_bank1_gr[4], minstate->pmsa_bank1_gr[5], + minstate->pmsa_bank1_gr[6], minstate->pmsa_bank1_gr[7]); + printk("r24-27 %016lx %016lx %016lx %016lx\n", + minstate->pmsa_bank1_gr[8], minstate->pmsa_bank1_gr[9], + minstate->pmsa_bank1_gr[10], minstate->pmsa_bank1_gr[11]); + printk("r28-31 %016lx %016lx %016lx %016lx\n", + minstate->pmsa_bank1_gr[12], minstate->pmsa_bank1_gr[13], + minstate->pmsa_bank1_gr[14], minstate->pmsa_bank1_gr[15]); +} + +static void +fetch_min_state (pal_min_state_area_t *ms, struct pt_regs *pt, struct switch_stack *sw) +{ + u64 *dst_banked, *src_banked, bit, shift, nat_bits; + int i; + + /* + * First, update the pt-regs and switch-stack structures with the contents stored + * in the min-state area: + */ + if (((struct ia64_psr *) &ms->pmsa_ipsr)->ic == 0) { + pt->cr_ipsr = ms->pmsa_xpsr; + pt->cr_iip = ms->pmsa_xip; + pt->cr_ifs = ms->pmsa_xfs; + } else { + pt->cr_ipsr = ms->pmsa_ipsr; + pt->cr_iip = ms->pmsa_iip; + pt->cr_ifs = ms->pmsa_ifs; + } + pt->ar_rsc = ms->pmsa_rsc; + pt->pr = ms->pmsa_pr; + pt->r1 = ms->pmsa_gr[0]; + pt->r2 = ms->pmsa_gr[1]; + pt->r3 = ms->pmsa_gr[2]; + sw->r4 = ms->pmsa_gr[3]; + sw->r5 = ms->pmsa_gr[4]; + sw->r6 = ms->pmsa_gr[5]; + sw->r7 = ms->pmsa_gr[6]; + pt->r8 = ms->pmsa_gr[7]; + pt->r9 = ms->pmsa_gr[8]; + pt->r10 = ms->pmsa_gr[9]; + pt->r11 = ms->pmsa_gr[10]; + pt->r12 = ms->pmsa_gr[11]; + pt->r13 = ms->pmsa_gr[12]; + pt->r14 = ms->pmsa_gr[13]; + pt->r15 = ms->pmsa_gr[14]; + dst_banked = &pt->r16; /* r16-r31 are contiguous in struct pt_regs */ + src_banked = ms->pmsa_bank1_gr; + for (i = 0; i < 16; ++i) + dst_banked[i] = src_banked[i]; + pt->b0 = ms->pmsa_br0; + sw->b1 = ms->pmsa_br1; + + /* construct the NaT bits for the pt-regs structure: */ +# define PUT_NAT_BIT(dst, addr) \ + do { \ + bit = nat_bits & 1; nat_bits >>= 1; \ + shift = ((unsigned long) addr >> 3) & 0x3f; \ + dst = ((dst) & ~(1UL << shift)) | (bit << shift); \ + } while (0) + + /* Rotate the saved NaT bits such that bit 0 corresponds to pmsa_gr[0]: */ + shift = ((unsigned long) &ms->pmsa_gr[0] >> 3) & 0x3f; + nat_bits = (ms->pmsa_nat_bits >> shift) | (ms->pmsa_nat_bits << (64 - shift)); + + PUT_NAT_BIT(sw->caller_unat, &pt->r1); + PUT_NAT_BIT(sw->caller_unat, &pt->r2); + PUT_NAT_BIT(sw->caller_unat, &pt->r3); + PUT_NAT_BIT(sw->ar_unat, &sw->r4); + PUT_NAT_BIT(sw->ar_unat, &sw->r5); + PUT_NAT_BIT(sw->ar_unat, &sw->r6); + PUT_NAT_BIT(sw->ar_unat, &sw->r7); + PUT_NAT_BIT(sw->caller_unat, &pt->r8); PUT_NAT_BIT(sw->caller_unat, &pt->r9); + PUT_NAT_BIT(sw->caller_unat, &pt->r10); PUT_NAT_BIT(sw->caller_unat, &pt->r11); + PUT_NAT_BIT(sw->caller_unat, &pt->r12); PUT_NAT_BIT(sw->caller_unat, &pt->r13); + PUT_NAT_BIT(sw->caller_unat, &pt->r14); PUT_NAT_BIT(sw->caller_unat, &pt->r15); + nat_bits >>= 16; /* skip over bank0 NaT bits */ + PUT_NAT_BIT(sw->caller_unat, &pt->r16); PUT_NAT_BIT(sw->caller_unat, &pt->r17); + PUT_NAT_BIT(sw->caller_unat, &pt->r18); PUT_NAT_BIT(sw->caller_unat, &pt->r19); + PUT_NAT_BIT(sw->caller_unat, &pt->r20); PUT_NAT_BIT(sw->caller_unat, &pt->r21); + PUT_NAT_BIT(sw->caller_unat, &pt->r22); PUT_NAT_BIT(sw->caller_unat, &pt->r23); + PUT_NAT_BIT(sw->caller_unat, &pt->r24); PUT_NAT_BIT(sw->caller_unat, &pt->r25); + PUT_NAT_BIT(sw->caller_unat, &pt->r26); PUT_NAT_BIT(sw->caller_unat, &pt->r27); + PUT_NAT_BIT(sw->caller_unat, &pt->r28); PUT_NAT_BIT(sw->caller_unat, &pt->r29); + PUT_NAT_BIT(sw->caller_unat, &pt->r30); PUT_NAT_BIT(sw->caller_unat, &pt->r31); +} + +static void +init_handler_platform (pal_min_state_area_t *ms, + struct pt_regs *pt, struct switch_stack *sw) +{ + struct unw_frame_info info; + + /* if a kernel debugger is available call it here else just dump the registers */ + + /* + * Wait for a bit. On some machines (e.g., HP's zx2000 and zx6000, INIT can be + * generated via the BMC's command-line interface, but since the console is on the + * same serial line, the user will need some time to switch out of the BMC before + * the dump begins. + */ + printk("Delaying for 5 seconds...\n"); + udelay(5*1000000); + show_min_state(ms); + + printk("Backtrace of current task (pid %d, %s)\n", current->pid, current->comm); + fetch_min_state(ms, pt, sw); + unw_init_from_interruption(&info, current, pt, sw); + ia64_do_show_stack(&info, NULL); + +#ifdef CONFIG_SMP + /* read_trylock() would be handy... */ + if (!tasklist_lock.write_lock) + read_lock(&tasklist_lock); +#endif + { + struct task_struct *g, *t; + do_each_thread (g, t) { + if (t == current) + continue; + + printk("\nBacktrace of pid %d (%s)\n", t->pid, t->comm); + show_stack(t, NULL); + } while_each_thread (g, t); + } +#ifdef CONFIG_SMP + if (!tasklist_lock.write_lock) + read_unlock(&tasklist_lock); +#endif + + printk("\nINIT dump complete. Please reboot now.\n"); + while (1); /* hang city if no debugger */ +} + +#ifdef CONFIG_ACPI +/* + * ia64_mca_register_cpev + * + * Register the corrected platform error vector with SAL. + * + * Inputs + * cpev Corrected Platform Error Vector number + * + * Outputs + * None + */ +static void +ia64_mca_register_cpev (int cpev) +{ + /* Register the CPE interrupt vector with SAL */ + struct ia64_sal_retval isrv; + + isrv = ia64_sal_mc_set_params(SAL_MC_PARAM_CPE_INT, SAL_MC_PARAM_MECHANISM_INT, cpev, 0, 0); + if (isrv.status) { + printk(KERN_ERR "Failed to register Corrected Platform " + "Error interrupt vector with SAL (status %ld)\n", isrv.status); + return; + } + + IA64_MCA_DEBUG("%s: corrected platform error " + "vector %#x registered\n", __FUNCTION__, cpev); +} +#endif /* CONFIG_ACPI */ + +#endif /* PLATFORM_MCA_HANDLERS */ + +/* + * ia64_mca_cmc_vector_setup + * + * Setup the corrected machine check vector register in the processor. + * (The interrupt is masked on boot. ia64_mca_late_init unmask this.) + * This function is invoked on a per-processor basis. + * + * Inputs + * None + * + * Outputs + * None + */ +void +ia64_mca_cmc_vector_setup (void) +{ + cmcv_reg_t cmcv; + + cmcv.cmcv_regval = 0; + cmcv.cmcv_mask = 1; /* Mask/disable interrupt at first */ + cmcv.cmcv_vector = IA64_CMC_VECTOR; + ia64_setreg(_IA64_REG_CR_CMCV, cmcv.cmcv_regval); + + IA64_MCA_DEBUG("%s: CPU %d corrected " + "machine check vector %#x registered.\n", + __FUNCTION__, smp_processor_id(), IA64_CMC_VECTOR); + + IA64_MCA_DEBUG("%s: CPU %d CMCV = %#016lx\n", + __FUNCTION__, smp_processor_id(), ia64_getreg(_IA64_REG_CR_CMCV)); +} + +/* + * ia64_mca_cmc_vector_disable + * + * Mask the corrected machine check vector register in the processor. + * This function is invoked on a per-processor basis. + * + * Inputs + * dummy(unused) + * + * Outputs + * None + */ +static void +ia64_mca_cmc_vector_disable (void *dummy) +{ + cmcv_reg_t cmcv; + + cmcv.cmcv_regval = ia64_getreg(_IA64_REG_CR_CMCV); + + cmcv.cmcv_mask = 1; /* Mask/disable interrupt */ + ia64_setreg(_IA64_REG_CR_CMCV, cmcv.cmcv_regval); + + IA64_MCA_DEBUG("%s: CPU %d corrected " + "machine check vector %#x disabled.\n", + __FUNCTION__, smp_processor_id(), cmcv.cmcv_vector); +} + +/* + * ia64_mca_cmc_vector_enable + * + * Unmask the corrected machine check vector register in the processor. + * This function is invoked on a per-processor basis. + * + * Inputs + * dummy(unused) + * + * Outputs + * None + */ +static void +ia64_mca_cmc_vector_enable (void *dummy) +{ + cmcv_reg_t cmcv; + + cmcv.cmcv_regval = ia64_getreg(_IA64_REG_CR_CMCV); + + cmcv.cmcv_mask = 0; /* Unmask/enable interrupt */ + ia64_setreg(_IA64_REG_CR_CMCV, cmcv.cmcv_regval); + + IA64_MCA_DEBUG("%s: CPU %d corrected " + "machine check vector %#x enabled.\n", + __FUNCTION__, smp_processor_id(), cmcv.cmcv_vector); +} + +/* + * ia64_mca_cmc_vector_disable_keventd + * + * Called via keventd (smp_call_function() is not safe in interrupt context) to + * disable the cmc interrupt vector. + */ +static void +ia64_mca_cmc_vector_disable_keventd(void *unused) +{ + on_each_cpu(ia64_mca_cmc_vector_disable, NULL, 1, 0); +} + +/* + * ia64_mca_cmc_vector_enable_keventd + * + * Called via keventd (smp_call_function() is not safe in interrupt context) to + * enable the cmc interrupt vector. + */ +static void +ia64_mca_cmc_vector_enable_keventd(void *unused) +{ + on_each_cpu(ia64_mca_cmc_vector_enable, NULL, 1, 0); +} + +/* + * ia64_mca_wakeup_ipi_wait + * + * Wait for the inter-cpu interrupt to be sent by the + * monarch processor once it is done with handling the + * MCA. + * + * Inputs : None + * Outputs : None + */ +static void +ia64_mca_wakeup_ipi_wait(void) +{ + int irr_num = (IA64_MCA_WAKEUP_VECTOR >> 6); + int irr_bit = (IA64_MCA_WAKEUP_VECTOR & 0x3f); + u64 irr = 0; + + do { + switch(irr_num) { + case 0: + irr = ia64_getreg(_IA64_REG_CR_IRR0); + break; + case 1: + irr = ia64_getreg(_IA64_REG_CR_IRR1); + break; + case 2: + irr = ia64_getreg(_IA64_REG_CR_IRR2); + break; + case 3: + irr = ia64_getreg(_IA64_REG_CR_IRR3); + break; + } + cpu_relax(); + } while (!(irr & (1UL << irr_bit))) ; +} + +/* + * ia64_mca_wakeup + * + * Send an inter-cpu interrupt to wake-up a particular cpu + * and mark that cpu to be out of rendez. + * + * Inputs : cpuid + * Outputs : None + */ +static void +ia64_mca_wakeup(int cpu) +{ + platform_send_ipi(cpu, IA64_MCA_WAKEUP_VECTOR, IA64_IPI_DM_INT, 0); + ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_NOTDONE; + +} + +/* + * ia64_mca_wakeup_all + * + * Wakeup all the cpus which have rendez'ed previously. + * + * Inputs : None + * Outputs : None + */ +static void +ia64_mca_wakeup_all(void) +{ + int cpu; + + /* Clear the Rendez checkin flag for all cpus */ + for(cpu = 0; cpu < NR_CPUS; cpu++) { + if (!cpu_online(cpu)) + continue; + if (ia64_mc_info.imi_rendez_checkin[cpu] == IA64_MCA_RENDEZ_CHECKIN_DONE) + ia64_mca_wakeup(cpu); + } + +} + +/* + * ia64_mca_rendez_interrupt_handler + * + * This is handler used to put slave processors into spinloop + * while the monarch processor does the mca handling and later + * wake each slave up once the monarch is done. + * + * Inputs : None + * Outputs : None + */ +static irqreturn_t +ia64_mca_rendez_int_handler(int rendez_irq, void *arg, struct pt_regs *ptregs) +{ + unsigned long flags; + int cpu = smp_processor_id(); + + /* Mask all interrupts */ + local_irq_save(flags); + + ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_DONE; + /* Register with the SAL monarch that the slave has + * reached SAL + */ + ia64_sal_mc_rendez(); + + /* Wait for the wakeup IPI from the monarch + * This waiting is done by polling on the wakeup-interrupt + * vector bit in the processor's IRRs + */ + ia64_mca_wakeup_ipi_wait(); + + /* Enable all interrupts */ + local_irq_restore(flags); + return IRQ_HANDLED; +} + +/* + * ia64_mca_wakeup_int_handler + * + * The interrupt handler for processing the inter-cpu interrupt to the + * slave cpu which was spinning in the rendez loop. + * Since this spinning is done by turning off the interrupts and + * polling on the wakeup-interrupt bit in the IRR, there is + * nothing useful to be done in the handler. + * + * Inputs : wakeup_irq (Wakeup-interrupt bit) + * arg (Interrupt handler specific argument) + * ptregs (Exception frame at the time of the interrupt) + * Outputs : None + * + */ +static irqreturn_t +ia64_mca_wakeup_int_handler(int wakeup_irq, void *arg, struct pt_regs *ptregs) +{ + return IRQ_HANDLED; +} + +/* + * ia64_return_to_sal_check + * + * This is function called before going back from the OS_MCA handler + * to the OS_MCA dispatch code which finally takes the control back + * to the SAL. + * The main purpose of this routine is to setup the OS_MCA to SAL + * return state which can be used by the OS_MCA dispatch code + * just before going back to SAL. + * + * Inputs : None + * Outputs : None + */ + +static void +ia64_return_to_sal_check(int recover) +{ + + /* Copy over some relevant stuff from the sal_to_os_mca_handoff + * so that it can be used at the time of os_mca_to_sal_handoff + */ + ia64_os_to_sal_handoff_state.imots_sal_gp = + ia64_sal_to_os_handoff_state.imsto_sal_gp; + + ia64_os_to_sal_handoff_state.imots_sal_check_ra = + ia64_sal_to_os_handoff_state.imsto_sal_check_ra; + + if (recover) + ia64_os_to_sal_handoff_state.imots_os_status = IA64_MCA_CORRECTED; + else + ia64_os_to_sal_handoff_state.imots_os_status = IA64_MCA_COLD_BOOT; + + /* Default = tell SAL to return to same context */ + ia64_os_to_sal_handoff_state.imots_context = IA64_MCA_SAME_CONTEXT; + + ia64_os_to_sal_handoff_state.imots_new_min_state = + (u64 *)ia64_sal_to_os_handoff_state.pal_min_state; + +} + +/* Function pointer for extra MCA recovery */ +int (*ia64_mca_ucmc_extension) + (void*,ia64_mca_sal_to_os_state_t*,ia64_mca_os_to_sal_state_t*) + = NULL; + +int +ia64_reg_MCA_extension(void *fn) +{ + if (ia64_mca_ucmc_extension) + return 1; + + ia64_mca_ucmc_extension = fn; + return 0; +} + +void +ia64_unreg_MCA_extension(void) +{ + if (ia64_mca_ucmc_extension) + ia64_mca_ucmc_extension = NULL; +} + +EXPORT_SYMBOL(ia64_reg_MCA_extension); +EXPORT_SYMBOL(ia64_unreg_MCA_extension); + +/* + * ia64_mca_ucmc_handler + * + * This is uncorrectable machine check handler called from OS_MCA + * dispatch code which is in turn called from SAL_CHECK(). + * This is the place where the core of OS MCA handling is done. + * Right now the logs are extracted and displayed in a well-defined + * format. This handler code is supposed to be run only on the + * monarch processor. Once the monarch is done with MCA handling + * further MCA logging is enabled by clearing logs. + * Monarch also has the duty of sending wakeup-IPIs to pull the + * slave processors out of rendezvous spinloop. + * + * Inputs : None + * Outputs : None + */ +void +ia64_mca_ucmc_handler(void) +{ + pal_processor_state_info_t *psp = (pal_processor_state_info_t *) + &ia64_sal_to_os_handoff_state.proc_state_param; + int recover; + + /* Get the MCA error record and log it */ + ia64_mca_log_sal_error_record(SAL_INFO_TYPE_MCA); + + /* TLB error is only exist in this SAL error record */ + recover = (psp->tc && !(psp->cc || psp->bc || psp->rc || psp->uc)) + /* other error recovery */ + || (ia64_mca_ucmc_extension + && ia64_mca_ucmc_extension( + IA64_LOG_CURR_BUFFER(SAL_INFO_TYPE_MCA), + &ia64_sal_to_os_handoff_state, + &ia64_os_to_sal_handoff_state)); + + if (recover) { + sal_log_record_header_t *rh = IA64_LOG_CURR_BUFFER(SAL_INFO_TYPE_MCA); + rh->severity = sal_log_severity_corrected; + ia64_sal_clear_state_info(SAL_INFO_TYPE_MCA); + } + /* + * Wakeup all the processors which are spinning in the rendezvous + * loop. + */ + ia64_mca_wakeup_all(); + + /* Return to SAL */ + ia64_return_to_sal_check(recover); +} + +static DECLARE_WORK(cmc_disable_work, ia64_mca_cmc_vector_disable_keventd, NULL); +static DECLARE_WORK(cmc_enable_work, ia64_mca_cmc_vector_enable_keventd, NULL); + +/* + * ia64_mca_cmc_int_handler + * + * This is corrected machine check interrupt handler. + * Right now the logs are extracted and displayed in a well-defined + * format. + * + * Inputs + * interrupt number + * client data arg ptr + * saved registers ptr + * + * Outputs + * None + */ +static irqreturn_t +ia64_mca_cmc_int_handler(int cmc_irq, void *arg, struct pt_regs *ptregs) +{ + static unsigned long cmc_history[CMC_HISTORY_LENGTH]; + static int index; + static DEFINE_SPINLOCK(cmc_history_lock); + + IA64_MCA_DEBUG("%s: received interrupt vector = %#x on CPU %d\n", + __FUNCTION__, cmc_irq, smp_processor_id()); + + /* SAL spec states this should run w/ interrupts enabled */ + local_irq_enable(); + + /* Get the CMC error record and log it */ + ia64_mca_log_sal_error_record(SAL_INFO_TYPE_CMC); + + spin_lock(&cmc_history_lock); + if (!cmc_polling_enabled) { + int i, count = 1; /* we know 1 happened now */ + unsigned long now = jiffies; + + for (i = 0; i < CMC_HISTORY_LENGTH; i++) { + if (now - cmc_history[i] <= HZ) + count++; + } + + IA64_MCA_DEBUG(KERN_INFO "CMC threshold %d/%d\n", count, CMC_HISTORY_LENGTH); + if (count >= CMC_HISTORY_LENGTH) { + + cmc_polling_enabled = 1; + spin_unlock(&cmc_history_lock); + schedule_work(&cmc_disable_work); + + /* + * Corrected errors will still be corrected, but + * make sure there's a log somewhere that indicates + * something is generating more than we can handle. + */ + printk(KERN_WARNING "WARNING: Switching to polling CMC handler; error records may be lost\n"); + + mod_timer(&cmc_poll_timer, jiffies + CMC_POLL_INTERVAL); + + /* lock already released, get out now */ + return IRQ_HANDLED; + } else { + cmc_history[index++] = now; + if (index == CMC_HISTORY_LENGTH) + index = 0; + } + } + spin_unlock(&cmc_history_lock); + return IRQ_HANDLED; +} + +/* + * ia64_mca_cmc_int_caller + * + * Triggered by sw interrupt from CMC polling routine. Calls + * real interrupt handler and either triggers a sw interrupt + * on the next cpu or does cleanup at the end. + * + * Inputs + * interrupt number + * client data arg ptr + * saved registers ptr + * Outputs + * handled + */ +static irqreturn_t +ia64_mca_cmc_int_caller(int cmc_irq, void *arg, struct pt_regs *ptregs) +{ + static int start_count = -1; + unsigned int cpuid; + + cpuid = smp_processor_id(); + + /* If first cpu, update count */ + if (start_count == -1) + start_count = IA64_LOG_COUNT(SAL_INFO_TYPE_CMC); + + ia64_mca_cmc_int_handler(cmc_irq, arg, ptregs); + + for (++cpuid ; cpuid < NR_CPUS && !cpu_online(cpuid) ; cpuid++); + + if (cpuid < NR_CPUS) { + platform_send_ipi(cpuid, IA64_CMCP_VECTOR, IA64_IPI_DM_INT, 0); + } else { + /* If no log record, switch out of polling mode */ + if (start_count == IA64_LOG_COUNT(SAL_INFO_TYPE_CMC)) { + + printk(KERN_WARNING "Returning to interrupt driven CMC handler\n"); + schedule_work(&cmc_enable_work); + cmc_polling_enabled = 0; + + } else { + + mod_timer(&cmc_poll_timer, jiffies + CMC_POLL_INTERVAL); + } + + start_count = -1; + } + + return IRQ_HANDLED; +} + +/* + * ia64_mca_cmc_poll + * + * Poll for Corrected Machine Checks (CMCs) + * + * Inputs : dummy(unused) + * Outputs : None + * + */ +static void +ia64_mca_cmc_poll (unsigned long dummy) +{ + /* Trigger a CMC interrupt cascade */ + platform_send_ipi(first_cpu(cpu_online_map), IA64_CMCP_VECTOR, IA64_IPI_DM_INT, 0); +} + +/* + * ia64_mca_cpe_int_caller + * + * Triggered by sw interrupt from CPE polling routine. Calls + * real interrupt handler and either triggers a sw interrupt + * on the next cpu or does cleanup at the end. + * + * Inputs + * interrupt number + * client data arg ptr + * saved registers ptr + * Outputs + * handled + */ +#ifdef CONFIG_ACPI + +static irqreturn_t +ia64_mca_cpe_int_caller(int cpe_irq, void *arg, struct pt_regs *ptregs) +{ + static int start_count = -1; + static int poll_time = MIN_CPE_POLL_INTERVAL; + unsigned int cpuid; + + cpuid = smp_processor_id(); + + /* If first cpu, update count */ + if (start_count == -1) + start_count = IA64_LOG_COUNT(SAL_INFO_TYPE_CPE); + + ia64_mca_cpe_int_handler(cpe_irq, arg, ptregs); + + for (++cpuid ; cpuid < NR_CPUS && !cpu_online(cpuid) ; cpuid++); + + if (cpuid < NR_CPUS) { + platform_send_ipi(cpuid, IA64_CPEP_VECTOR, IA64_IPI_DM_INT, 0); + } else { + /* + * If a log was recorded, increase our polling frequency, + * otherwise, backoff or return to interrupt mode. + */ + if (start_count != IA64_LOG_COUNT(SAL_INFO_TYPE_CPE)) { + poll_time = max(MIN_CPE_POLL_INTERVAL, poll_time / 2); + } else if (cpe_vector < 0) { + poll_time = min(MAX_CPE_POLL_INTERVAL, poll_time * 2); + } else { + poll_time = MIN_CPE_POLL_INTERVAL; + + printk(KERN_WARNING "Returning to interrupt driven CPE handler\n"); + enable_irq(local_vector_to_irq(IA64_CPE_VECTOR)); + cpe_poll_enabled = 0; + } + + if (cpe_poll_enabled) + mod_timer(&cpe_poll_timer, jiffies + poll_time); + start_count = -1; + } + + return IRQ_HANDLED; +} + +#endif /* CONFIG_ACPI */ + +/* + * ia64_mca_cpe_poll + * + * Poll for Corrected Platform Errors (CPEs), trigger interrupt + * on first cpu, from there it will trickle through all the cpus. + * + * Inputs : dummy(unused) + * Outputs : None + * + */ +static void +ia64_mca_cpe_poll (unsigned long dummy) +{ + /* Trigger a CPE interrupt cascade */ + platform_send_ipi(first_cpu(cpu_online_map), IA64_CPEP_VECTOR, IA64_IPI_DM_INT, 0); +} + +/* + * C portion of the OS INIT handler + * + * Called from ia64_monarch_init_handler + * + * Inputs: pointer to pt_regs where processor info was saved. + * + * Returns: + * 0 if SAL must warm boot the System + * 1 if SAL must return to interrupted context using PAL_MC_RESUME + * + */ +void +ia64_init_handler (struct pt_regs *pt, struct switch_stack *sw) +{ + pal_min_state_area_t *ms; + + oops_in_progress = 1; /* avoid deadlock in printk, but it makes recovery dodgy */ + console_loglevel = 15; /* make sure printks make it to console */ + + printk(KERN_INFO "Entered OS INIT handler. PSP=%lx\n", + ia64_sal_to_os_handoff_state.proc_state_param); + + /* + * Address of minstate area provided by PAL is physical, + * uncacheable (bit 63 set). Convert to Linux virtual + * address in region 6. + */ + ms = (pal_min_state_area_t *)(ia64_sal_to_os_handoff_state.pal_min_state | (6ul<<61)); + + init_handler_platform(ms, pt, sw); /* call platform specific routines */ +} + +static int __init +ia64_mca_disable_cpe_polling(char *str) +{ + cpe_poll_enabled = 0; + return 1; +} + +__setup("disable_cpe_poll", ia64_mca_disable_cpe_polling); + +static struct irqaction cmci_irqaction = { + .handler = ia64_mca_cmc_int_handler, + .flags = SA_INTERRUPT, + .name = "cmc_hndlr" +}; + +static struct irqaction cmcp_irqaction = { + .handler = ia64_mca_cmc_int_caller, + .flags = SA_INTERRUPT, + .name = "cmc_poll" +}; + +static struct irqaction mca_rdzv_irqaction = { + .handler = ia64_mca_rendez_int_handler, + .flags = SA_INTERRUPT, + .name = "mca_rdzv" +}; + +static struct irqaction mca_wkup_irqaction = { + .handler = ia64_mca_wakeup_int_handler, + .flags = SA_INTERRUPT, + .name = "mca_wkup" +}; + +#ifdef CONFIG_ACPI +static struct irqaction mca_cpe_irqaction = { + .handler = ia64_mca_cpe_int_handler, + .flags = SA_INTERRUPT, + .name = "cpe_hndlr" +}; + +static struct irqaction mca_cpep_irqaction = { + .handler = ia64_mca_cpe_int_caller, + .flags = SA_INTERRUPT, + .name = "cpe_poll" +}; +#endif /* CONFIG_ACPI */ + +/* Do per-CPU MCA-related initialization. */ + +void __devinit +ia64_mca_cpu_init(void *cpu_data) +{ + void *pal_vaddr; + + if (smp_processor_id() == 0) { + void *mca_data; + int cpu; + + mca_data = alloc_bootmem(sizeof(struct ia64_mca_cpu) + * NR_CPUS); + for (cpu = 0; cpu < NR_CPUS; cpu++) { + __per_cpu_mca[cpu] = __pa(mca_data); + mca_data += sizeof(struct ia64_mca_cpu); + } + } + + /* + * The MCA info structure was allocated earlier and its + * physical address saved in __per_cpu_mca[cpu]. Copy that + * address * to ia64_mca_data so we can access it as a per-CPU + * variable. + */ + __get_cpu_var(ia64_mca_data) = __per_cpu_mca[smp_processor_id()]; + + /* + * Stash away a copy of the PTE needed to map the per-CPU page. + * We may need it during MCA recovery. + */ + __get_cpu_var(ia64_mca_per_cpu_pte) = + pte_val(mk_pte_phys(__pa(cpu_data), PAGE_KERNEL)); + + /* + * Also, stash away a copy of the PAL address and the PTE + * needed to map it. + */ + pal_vaddr = efi_get_pal_addr(); + if (!pal_vaddr) + return; + __get_cpu_var(ia64_mca_pal_base) = + GRANULEROUNDDOWN((unsigned long) pal_vaddr); + __get_cpu_var(ia64_mca_pal_pte) = pte_val(mk_pte_phys(__pa(pal_vaddr), + PAGE_KERNEL)); +} + +/* + * ia64_mca_init + * + * Do all the system level mca specific initialization. + * + * 1. Register spinloop and wakeup request interrupt vectors + * + * 2. Register OS_MCA handler entry point + * + * 3. Register OS_INIT handler entry point + * + * 4. Initialize MCA/CMC/INIT related log buffers maintained by the OS. + * + * Note that this initialization is done very early before some kernel + * services are available. + * + * Inputs : None + * + * Outputs : None + */ +void __init +ia64_mca_init(void) +{ + ia64_fptr_t *mon_init_ptr = (ia64_fptr_t *)ia64_monarch_init_handler; + ia64_fptr_t *slave_init_ptr = (ia64_fptr_t *)ia64_slave_init_handler; + ia64_fptr_t *mca_hldlr_ptr = (ia64_fptr_t *)ia64_os_mca_dispatch; + int i; + s64 rc; + struct ia64_sal_retval isrv; + u64 timeout = IA64_MCA_RENDEZ_TIMEOUT; /* platform specific */ + + IA64_MCA_DEBUG("%s: begin\n", __FUNCTION__); + + /* Clear the Rendez checkin flag for all cpus */ + for(i = 0 ; i < NR_CPUS; i++) + ia64_mc_info.imi_rendez_checkin[i] = IA64_MCA_RENDEZ_CHECKIN_NOTDONE; + + /* + * Register the rendezvous spinloop and wakeup mechanism with SAL + */ + + /* Register the rendezvous interrupt vector with SAL */ + while (1) { + isrv = ia64_sal_mc_set_params(SAL_MC_PARAM_RENDEZ_INT, + SAL_MC_PARAM_MECHANISM_INT, + IA64_MCA_RENDEZ_VECTOR, + timeout, + SAL_MC_PARAM_RZ_ALWAYS); + rc = isrv.status; + if (rc == 0) + break; + if (rc == -2) { + printk(KERN_INFO "Increasing MCA rendezvous timeout from " + "%ld to %ld milliseconds\n", timeout, isrv.v0); + timeout = isrv.v0; + continue; + } + printk(KERN_ERR "Failed to register rendezvous interrupt " + "with SAL (status %ld)\n", rc); + return; + } + + /* Register the wakeup interrupt vector with SAL */ + isrv = ia64_sal_mc_set_params(SAL_MC_PARAM_RENDEZ_WAKEUP, + SAL_MC_PARAM_MECHANISM_INT, + IA64_MCA_WAKEUP_VECTOR, + 0, 0); + rc = isrv.status; + if (rc) { + printk(KERN_ERR "Failed to register wakeup interrupt with SAL " + "(status %ld)\n", rc); + return; + } + + IA64_MCA_DEBUG("%s: registered MCA rendezvous spinloop and wakeup mech.\n", __FUNCTION__); + + ia64_mc_info.imi_mca_handler = ia64_tpa(mca_hldlr_ptr->fp); + /* + * XXX - disable SAL checksum by setting size to 0; should be + * ia64_tpa(ia64_os_mca_dispatch_end) - ia64_tpa(ia64_os_mca_dispatch); + */ + ia64_mc_info.imi_mca_handler_size = 0; + + /* Register the os mca handler with SAL */ + if ((rc = ia64_sal_set_vectors(SAL_VECTOR_OS_MCA, + ia64_mc_info.imi_mca_handler, + ia64_tpa(mca_hldlr_ptr->gp), + ia64_mc_info.imi_mca_handler_size, + 0, 0, 0))) + { + printk(KERN_ERR "Failed to register OS MCA handler with SAL " + "(status %ld)\n", rc); + return; + } + + IA64_MCA_DEBUG("%s: registered OS MCA handler with SAL at 0x%lx, gp = 0x%lx\n", __FUNCTION__, + ia64_mc_info.imi_mca_handler, ia64_tpa(mca_hldlr_ptr->gp)); + + /* + * XXX - disable SAL checksum by setting size to 0, should be + * size of the actual init handler in mca_asm.S. + */ + ia64_mc_info.imi_monarch_init_handler = ia64_tpa(mon_init_ptr->fp); + ia64_mc_info.imi_monarch_init_handler_size = 0; + ia64_mc_info.imi_slave_init_handler = ia64_tpa(slave_init_ptr->fp); + ia64_mc_info.imi_slave_init_handler_size = 0; + + IA64_MCA_DEBUG("%s: OS INIT handler at %lx\n", __FUNCTION__, + ia64_mc_info.imi_monarch_init_handler); + + /* Register the os init handler with SAL */ + if ((rc = ia64_sal_set_vectors(SAL_VECTOR_OS_INIT, + ia64_mc_info.imi_monarch_init_handler, + ia64_tpa(ia64_getreg(_IA64_REG_GP)), + ia64_mc_info.imi_monarch_init_handler_size, + ia64_mc_info.imi_slave_init_handler, + ia64_tpa(ia64_getreg(_IA64_REG_GP)), + ia64_mc_info.imi_slave_init_handler_size))) + { + printk(KERN_ERR "Failed to register m/s INIT handlers with SAL " + "(status %ld)\n", rc); + return; + } + + IA64_MCA_DEBUG("%s: registered OS INIT handler with SAL\n", __FUNCTION__); + + /* + * Configure the CMCI/P vector and handler. Interrupts for CMC are + * per-processor, so AP CMC interrupts are setup in smp_callin() (smpboot.c). + */ + register_percpu_irq(IA64_CMC_VECTOR, &cmci_irqaction); + register_percpu_irq(IA64_CMCP_VECTOR, &cmcp_irqaction); + ia64_mca_cmc_vector_setup(); /* Setup vector on BSP */ + + /* Setup the MCA rendezvous interrupt vector */ + register_percpu_irq(IA64_MCA_RENDEZ_VECTOR, &mca_rdzv_irqaction); + + /* Setup the MCA wakeup interrupt vector */ + register_percpu_irq(IA64_MCA_WAKEUP_VECTOR, &mca_wkup_irqaction); + +#ifdef CONFIG_ACPI + /* Setup the CPEI/P vector and handler */ + cpe_vector = acpi_request_vector(ACPI_INTERRUPT_CPEI); + register_percpu_irq(IA64_CPEP_VECTOR, &mca_cpep_irqaction); +#endif + + /* Initialize the areas set aside by the OS to buffer the + * platform/processor error states for MCA/INIT/CMC + * handling. + */ + ia64_log_init(SAL_INFO_TYPE_MCA); + ia64_log_init(SAL_INFO_TYPE_INIT); + ia64_log_init(SAL_INFO_TYPE_CMC); + ia64_log_init(SAL_INFO_TYPE_CPE); + + mca_init = 1; + printk(KERN_INFO "MCA related initialization done\n"); +} + +/* + * ia64_mca_late_init + * + * Opportunity to setup things that require initialization later + * than ia64_mca_init. Setup a timer to poll for CPEs if the + * platform doesn't support an interrupt driven mechanism. + * + * Inputs : None + * Outputs : Status + */ +static int __init +ia64_mca_late_init(void) +{ + if (!mca_init) + return 0; + + /* Setup the CMCI/P vector and handler */ + init_timer(&cmc_poll_timer); + cmc_poll_timer.function = ia64_mca_cmc_poll; + + /* Unmask/enable the vector */ + cmc_polling_enabled = 0; + schedule_work(&cmc_enable_work); + + IA64_MCA_DEBUG("%s: CMCI/P setup and enabled.\n", __FUNCTION__); + +#ifdef CONFIG_ACPI + /* Setup the CPEI/P vector and handler */ + init_timer(&cpe_poll_timer); + cpe_poll_timer.function = ia64_mca_cpe_poll; + + { + irq_desc_t *desc; + unsigned int irq; + + if (cpe_vector >= 0) { + /* If platform supports CPEI, enable the irq. */ + cpe_poll_enabled = 0; + for (irq = 0; irq < NR_IRQS; ++irq) + if (irq_to_vector(irq) == cpe_vector) { + desc = irq_descp(irq); + desc->status |= IRQ_PER_CPU; + setup_irq(irq, &mca_cpe_irqaction); + } + ia64_mca_register_cpev(cpe_vector); + IA64_MCA_DEBUG("%s: CPEI/P setup and enabled.\n", __FUNCTION__); + } else { + /* If platform doesn't support CPEI, get the timer going. */ + if (cpe_poll_enabled) { + ia64_mca_cpe_poll(0UL); + IA64_MCA_DEBUG("%s: CPEP setup and enabled.\n", __FUNCTION__); + } + } + } +#endif + + return 0; +} + +device_initcall(ia64_mca_late_init); |
