/**
* DO NOT run any linux calls (e.g. printk) here as they may race with the
* existing linux threads.
*/
int lkl_trigger_irq(int irq)
{
if (!irq || irq > NR_IRQS)
return -EINVAL;
SET_IRQ_STATUS(irq);
wakeup_cpu();
return 0;
}
/**
* DO NOT run any linux calls (e.g. printk) here as they may race with the
* existing linux threads.
*/
int lkl_trigger_irq(int irq, void *data)
{
int ret = 0;
if (irq >= NR_IRQS)
return -EINVAL;
irqs[irq].triggered = true;
__sync_synchronize();
irqs_triggered = true;
wakeup_cpu();
return ret;
}
/*-------------------------------------------------------------------*/
int ARCH_DEP(system_reset) (const int cpu, const int clear, const int target_mode)
{
int rc;
int n;
int regs_mode;
int architecture_switch;
REGS* regs;
CPU_BITMAP mask;
/* Configure the cpu if it is not online (configure implies initial
* reset)
*/
if (!IS_CPU_ONLINE(cpu))
{
sysblk.arch_mode = target_mode;
if ( (rc = configure_cpu(cpu)) )
return rc;
}
HDC1(debug_cpu_state, sysblk.regs[cpu]);
/* Define the target mode for reset */
if (target_mode > ARCH_390 &&
(clear || sysblk.arch_mode != target_mode))
regs_mode = ARCH_390;
else
regs_mode = target_mode;
architecture_switch = (target_mode != sysblk.arch_mode);
/* Signal all CPUs in configuration to stop and reset */
{
/* Switch lock context to hold both sigplock and intlock */
RELEASE_INTLOCK(NULL);
obtain_lock(&sysblk.sigplock);
OBTAIN_INTLOCK(NULL);
/* Ensure no external updates pending */
OFF_IC_SERVSIG;
OFF_IC_INTKEY;
/* Loop through CPUs and issue appropriate CPU reset function
*/
{
mask = sysblk.config_mask;
for (n = 0; mask; mask >>= 1, ++n)
{
if (mask & 1)
{
regs = sysblk.regs[n];
/* Signal CPU reset function; if requesting CPU with
* CLEAR or architecture change, signal initial CPU
* reset. Otherwise, signal a normal CPU reset.
*/
regs->arch_mode = regs_mode;
if (n == cpu &&
(clear || architecture_switch))
regs->sigpireset = 1;
else
regs->sigpreset = 1;
regs->opinterv = 1;
regs->cpustate = CPUSTATE_STOPPING;
ON_IC_INTERRUPT(regs);
wakeup_cpu(regs);
}
}
}
/* Return to hold of just intlock */
RELEASE_INTLOCK(NULL);
release_lock(&sysblk.sigplock);
OBTAIN_INTLOCK(NULL);
}
/* Wait for CPUs to complete reset */
{
int i;
int wait;
for (n = 0; ; ++n)
{
mask = sysblk.config_mask;
for (i = wait = 0; mask; mask >>= 1, ++i)
{
regs = sysblk.regs[i];
if (regs->cpustate != CPUSTATE_STOPPED)
{
/* Release intlock, take a nap, and re-acquire */
RELEASE_INTLOCK(NULL);
wait = 1;
usleep(10000);
OBTAIN_INTLOCK(NULL);
}
}
if (!wait)
break;
if (n < 300)
continue;
/* FIXME: Recovery code needed to handle case where CPUs
* are misbehaving. Outstanding locks should be
* reported, then take-over CPUs and perform an
* initial reset of each CPU.
*/
WRMSG(HHC90000, "E", "Could not perform reset within three seconds");
break;
}
}
/* Perform subsystem reset */
subsystem_reset();
/* Switch modes to requested mode */
sysblk.arch_mode = regs_mode;
/* Perform system-reset-clear additional functions */
if (clear)
{
/* Finish reset-clear of all CPUs in the configuration */
for (n = 0; n < sysblk.maxcpu; ++n)
{
if (IS_CPU_ONLINE(n))
{
regs = sysblk.regs[n];
/* Clear all the registers (AR, GPR, FPR, VR) as part
* of the CPU CLEAR RESET operation
*/
memset (regs->ar, 0, sizeof(regs->ar));
memset (regs->gr, 0, sizeof(regs->gr));
memset (regs->fpr, 0, sizeof(regs->fpr));
#if defined(_FEATURE_VECTOR_FACILITY)
memset (regs->vf->vr, 0, sizeof(regs->vf->vr));
#endif /*defined(_FEATURE_VECTOR_FACILITY)*/
}
}
sysblk.ipled = FALSE;
sysblk.program_parameter = 0;
/* Clear storage */
sysblk.main_clear = sysblk.xpnd_clear = 0;
storage_clear();
xstorage_clear();
}
#if defined(FEATURE_CONFIGURATION_TOPOLOGY_FACILITY)
/* Clear topology-change-report-pending condition */
sysblk.topchnge = 0;
#endif /*defined(FEATURE_CONFIGURATION_TOPOLOGY_FACILITY)*/
/* set default system state to reset */
sysblk.sys_reset = TRUE;
return (0);
} /* end function system_reset */
/*-------------------------------------------------------------------*/
int ARCH_DEP(system_reset)
(
const int cpu, /* CPU address */
const int flags, /* Flags:
* 0x00 0000 0000 System reset normal
* 0x01 .... ...1 System reset clear
* 0x02 .... ..1. System reset normal
* with initial CPU
* reset on requesting
* processor (used by
* IPL)
*/
const int target_mode /* Target architecture mode */
)
{
int rc;
int n;
int regs_mode;
int architecture_switch;
REGS* regs;
CPU_BITMAP mask;
/* Configure the cpu if it is not online (configure implies initial
* reset)
*/
if (!IS_CPU_ONLINE(cpu))
{
sysblk.arch_mode = target_mode;
if ( (rc = configure_cpu(cpu)) )
return rc;
}
HDC1(debug_cpu_state, sysblk.regs[cpu]);
/* Define the target mode for reset */
if (flags &&
target_mode > ARCH_390)
regs_mode = ARCH_390;
else
regs_mode = target_mode;
architecture_switch = (regs_mode != sysblk.arch_mode);
/* Signal all CPUs in configuration to stop and reset */
{
/* Switch lock context to hold both sigplock and intlock */
RELEASE_INTLOCK(NULL);
obtain_lock(&sysblk.sigplock);
OBTAIN_INTLOCK(NULL);
/* Ensure no external updates pending */
OFF_IC_SERVSIG;
OFF_IC_INTKEY;
/* Loop through CPUs and issue appropriate CPU reset function
*/
{
mask = sysblk.config_mask;
for (n = 0; mask; mask >>= 1, ++n)
{
if (mask & 1)
{
regs = sysblk.regs[n];
/* Signal CPU reset function; if requesting CPU with
* CLEAR or architecture change, signal initial CPU
* reset. Otherwise, signal a normal CPU reset.
*/
if ((n == cpu && (flags & 0x03)) ||
architecture_switch)
regs->sigpireset = 1;
else
regs->sigpreset = 1;
regs->opinterv = 1;
regs->cpustate = CPUSTATE_STOPPING;
ON_IC_INTERRUPT(regs);
wakeup_cpu(regs);
}
}
}
/* Return to hold of just intlock */
RELEASE_INTLOCK(NULL);
release_lock(&sysblk.sigplock);
OBTAIN_INTLOCK(NULL);
}
/* Wait for CPUs to complete reset */
{
int i;
int wait;
for (n = 0; ; ++n)
{
mask = sysblk.config_mask;
for (i = wait = 0; mask; mask >>= 1, ++i)
{
if (!(mask & 1))
continue;
regs = sysblk.regs[i];
if (regs->cpustate != CPUSTATE_STOPPED)
{
/* Release intlock, take a nap, and re-acquire */
RELEASE_INTLOCK(NULL);
wait = 1;
usleep(10000);
OBTAIN_INTLOCK(NULL);
}
}
if (!wait)
break;
if (n < 300)
continue;
/* FIXME: Recovery code needed to handle case where CPUs
* are misbehaving. Outstanding locks should be
* reported, then take-over CPUs and perform an
* initial reset of each CPU.
*/
WRMSG(HHC90000, "E", "Could not perform reset within three seconds");
break;
}
}
/* If architecture switch, complete reset in requested mode */
if (architecture_switch)
{
sysblk.arch_mode = regs_mode;
return ARCH_DEP(system_reset)(cpu, flags, target_mode);
}
/* Perform subsystem reset
*
* GA22-7000-10 IBM System/370 Principles of Operation, Chapter 4.
* Control, Subsystem Reset, p. 4-34
* SA22-7085-00 IBM System/370 Extended Architecture Principles of
* Operation, Chapter 4. Control, Subsystem Reset,
* p. 4-28
* SA22-7832-09 z/Architecture Principles of Operation, Chapter 4.
* Control, Subsystem Reset, p. 4-57
*/
subsystem_reset();
/* Perform system-reset-clear additional functions */
if (flags & 0x01)
{
/* Finish reset-clear of all CPUs in the configuration */
for (n = 0; n < sysblk.maxcpu; ++n)
{
if (IS_CPU_ONLINE(n))
{
regs = sysblk.regs[n];
/* Clear all the registers (AR, GPR, FPR, VR) as part
* of the CPU CLEAR RESET operation
*/
memset (regs->ar, 0, sizeof(regs->ar));
memset (regs->gr, 0, sizeof(regs->gr));
memset (regs->fpr, 0, sizeof(regs->fpr));
#if defined(_FEATURE_VECTOR_FACILITY)
memset (regs->vf->vr, 0, sizeof(regs->vf->vr));
#endif /*defined(_FEATURE_VECTOR_FACILITY)*/
/* Clear the instruction counter and CPU time used */
cpu_reset_instcount_and_cputime(regs);
}
}
/* Clear storage */
sysblk.main_clear = sysblk.xpnd_clear = 0;
storage_clear();
xstorage_clear();
/* Clear IPL program parameter */
sysblk.program_parameter = 0;
}
/* If IPL call, reset CPU instruction counts and times */
else if (flags & 0x02)
{
CPU_BITMAP mask = sysblk.config_mask;
int i;
for (i = 0; mask; mask >>= 1, ++i)
{
if (mask & 1)
cpu_reset_instcount_and_cputime(sysblk.regs[i]);
}
}