void __cpuinit platform_secondary_init(unsigned int cpu)
{
trace_hardirqs_off();
/*
* the primary core may have used a "cross call" soft interrupt
* to get this processor out of WFI in the BootMonitor - make
* sure that we are no longer being sent this soft interrupt
*/
smp_cross_call_done(cpumask_of_cpu(cpu));
/*
* if any interrupts are already enabled for the primary
* core (e.g. timer irq), then they will not have been enabled
* for us: do so
*/
if (machine_is_realview_eb() && core_tile_eb11mp())
gic_cpu_init(0, __io_address(REALVIEW_EB11MP_GIC_CPU_BASE));
else if (machine_is_realview_pb11mp())
gic_cpu_init(0, __io_address(REALVIEW_TC11MP_GIC_CPU_BASE));
/*
* let the primary processor know we're out of the
* pen, then head off into the C entry point
*/
pen_release = -1;
smp_wmb();
/*
* Synchronise with the boot thread.
*/
spin_lock(&boot_lock);
spin_unlock(&boot_lock);
}
void __init smp_prepare_cpus(unsigned int max_cpus)
{
unsigned int ncores = get_core_count();
unsigned int cpu = smp_processor_id();
int i;
/* sanity check */
if (ncores == 0) {
printk(KERN_ERR
"Realview: strange CM count of 0? Default to 1\n");
ncores = 1;
}
if (ncores > NR_CPUS) {
printk(KERN_WARNING
"Realview: no. of cores (%d) greater than configured "
"maximum of %d - clipping\n",
ncores, NR_CPUS);
ncores = NR_CPUS;
}
smp_store_cpu_info(cpu);
/*
* are we trying to boot more cores than exist?
*/
if (max_cpus > ncores)
max_cpus = ncores;
#ifdef CONFIG_LOCAL_TIMERS
/*
* Enable the local timer for primary CPU. If the device is
* dummy (!CONFIG_LOCAL_TIMERS), it was already registers in
* realview_timer_init
*/
if ((machine_is_realview_eb() && core_tile_eb11mp()) ||
machine_is_realview_pb11mp())
local_timer_setup(cpu);
#endif
/*
* Initialise the present map, which describes the set of CPUs
* actually populated at the present time.
*/
for (i = 0; i < max_cpus; i++)
cpu_set(i, cpu_present_map);
/*
* Initialise the SCU if there are more than one CPU and let
* them know where to start. Note that, on modern versions of
* MILO, the "poke" doesn't actually do anything until each
* individual core is sent a soft interrupt to get it out of
* WFI
*/
if (max_cpus > 1) {
scu_enable();
poke_milo();
}
}
static void __iomem *scu_base_addr(void)
{
if (machine_is_realview_eb_mp())
return __io_address(REALVIEW_EB11MP_SCU_BASE);
else if (machine_is_realview_pb11mp())
return __io_address(REALVIEW_TC11MP_SCU_BASE);
else
return (void __iomem *)0;
}
static void __iomem *scu_base_addr(void)
{
if (machine_is_realview_eb_mp())
return __io_address(REALVIEW_EB11MP_SCU_BASE);
else if (machine_is_realview_pb11mp())
return __io_address(REALVIEW_TC11MP_SCU_BASE);
else if (machine_is_realview_pbx() &&
(core_tile_pbx11mp() || core_tile_pbxa9mp()))
return __io_address(REALVIEW_PBX_TILE_SCU_BASE);
else
return (void __iomem *)0;
}
/*
* Setup the SCU
*/
static void scu_enable(void)
{
u32 scu_ctrl;
void __iomem *scu_base;
if (machine_is_realview_eb() && core_tile_eb11mp())
scu_base = __io_address(REALVIEW_EB11MP_SCU_BASE);
else if (machine_is_realview_pb11mp())
scu_base = __io_address(REALVIEW_TC11MP_SCU_BASE);
else
BUG();
scu_ctrl = __raw_readl(scu_base + SCU_CTRL);
scu_ctrl |= 1;
__raw_writel(scu_ctrl, scu_base + SCU_CTRL);
}
static unsigned int __init get_core_count(void)
{
unsigned int ncores;
void __iomem *scu_base = 0;
if (machine_is_realview_eb() && core_tile_eb11mp())
scu_base = __io_address(REALVIEW_EB11MP_SCU_BASE);
else if (machine_is_realview_pb11mp())
scu_base = __io_address(REALVIEW_TC11MP_SCU_BASE);
if (scu_base) {
ncores = __raw_readl(scu_base + SCU_CONFIG);
ncores = (ncores & 0x03) + 1;
} else
ncores = 1;
return ncores;
}