static int hotplug_rtb_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
/*
* Bits [19:4] of the data are the online mask, lower 4 bits are the
* cpu number that is being changed. Additionally, changes to the
* online_mask that will be done by the current hotplug will be made
* even though they aren't necessarily in the online mask yet.
*
* XXX: This design is limited to supporting at most 16 cpus
*/
unsigned long this_cpumask = CPUSET_OF(1 << (unsigned long)hcpu);
unsigned long cpumask = CPUSET_OF(cpumask_bits(cpu_online_mask)[0]);
unsigned long cpudata = CPU_OF((unsigned long)hcpu) | cpumask;
switch (action & (~CPU_TASKS_FROZEN)) {
case CPU_STARTING:
uncached_logk(LOGK_HOTPLUG, (void *)(cpudata | this_cpumask));
break;
case CPU_DYING:
uncached_logk(LOGK_HOTPLUG, (void *)(cpudata & ~this_cpumask));
break;
default:
break;
}
return NOTIFY_OK;
}
/*
* The kernel tried to access some page that wasn't present.
*/
static void __do_kernel_fault(struct mm_struct *mm, unsigned long addr,
unsigned int esr, struct pt_regs *regs)
{
#if defined(CONFIG_HTC_DEBUG_RTB)
static int enable_logk_die = 1;
#endif
/*
* Are we prepared to handle this kernel fault?
*/
if (fixup_exception(regs))
return;
#if defined(CONFIG_HTC_DEBUG_RTB)
if (enable_logk_die) {
uncached_logk(LOGK_DIE, (void *)regs->pc);
uncached_logk(LOGK_DIE, (void *)regs->regs[30]);
uncached_logk(LOGK_DIE, (void *)addr);
/* Disable RTB here to avoid weird recursive spinlock/printk behaviors */
msm_rtb_disable();
enable_logk_die = 0;
}
#endif
/*
* No handler, we'll have to terminate things with extreme prejudice.
*/
bust_spinlocks(1);
pr_alert("Unable to handle kernel %s at virtual address %08lx\n",
(addr < PAGE_SIZE) ? "NULL pointer dereference" :
"paging request", addr);
show_pte(mm, addr);
die("Oops", regs, esr);
bust_spinlocks(0);
do_exit(SIGKILL);
}
static int hotplug_rtb_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
/*
*/
int this_cpumask = CPUSET_OF(1 << (int)hcpu);
int cpumask = CPUSET_OF(cpumask_bits(cpu_online_mask)[0]);
int cpudata = CPU_OF((int)hcpu) | cpumask;
switch (action & (~CPU_TASKS_FROZEN)) {
case CPU_STARTING:
uncached_logk(LOGK_HOTPLUG, (void *)(cpudata | this_cpumask));
break;
case CPU_DYING:
cpumask_set_cpu((unsigned long)hcpu, &cpu_dying_mask);
uncached_logk(LOGK_HOTPLUG, (void *)(cpudata & ~this_cpumask));
break;
default:
break;
}
return NOTIFY_OK;
}
static void __do_kernel_fault(struct mm_struct *mm, unsigned long addr,
unsigned int esr, struct pt_regs *regs)
{
#if defined(CONFIG_HTC_DEBUG_RTB)
static int enable_logk_die = 1;
#endif
if (fixup_exception(regs))
return;
#if defined(CONFIG_HTC_DEBUG_RTB)
if (enable_logk_die) {
uncached_logk(LOGK_DIE, (void *)regs->pc);
uncached_logk(LOGK_DIE, (void *)regs->regs[30]);
uncached_logk(LOGK_DIE, (void *)addr);
msm_rtb_disable();
enable_logk_die = 0;
}
#endif
bust_spinlocks(1);
pr_alert("Unable to handle kernel %s at virtual address %08lx\n",
(addr < PAGE_SIZE) ? "NULL pointer dereference" :
"paging request", addr);
show_pte(mm, addr);
die("Oops", regs, esr);
bust_spinlocks(0);
do_exit(SIGKILL);
}
