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/* SPDX-License-Identifier: GPL-2.0 */
/*
 * ARM specific SMP header, this contains our implementation
 * details.
 */
#ifndef __ASMARM_SMP_PLAT_H
#define __ASMARM_SMP_PLAT_H

#include <linux/cpumask.h>
#include <linux/err.h>

#include <asm/cpu.h>
#include <asm/cputype.h>

/*
 * Return true if we are running on a SMP platform
 */
static inline bool is_smp(void)
{
#ifndef CONFIG_SMP
	return false;
#elif defined(CONFIG_SMP_ON_UP)
	extern unsigned int smp_on_up;
	return !!smp_on_up;
#else
	return true;
#endif
}

/**
 * smp_cpuid_part() - return part id for a given cpu
 * @cpu:	logical cpu id.
 *
 * Return: part id of logical cpu passed as argument.
 */
static inline unsigned int smp_cpuid_part(int cpu)
{
	struct cpuinfo_arm *cpu_info = &per_cpu(cpu_data, cpu);

	return is_smp() ? cpu_info->cpuid & ARM_CPU_PART_MASK :
			  read_cpuid_part();
}

/* all SMP configurations have the extended CPUID registers */
#ifndef CONFIG_MMU
#define tlb_ops_need_broadcast()	0
#else
static inline int tlb_ops_need_broadcast(void)
{
	if (!is_smp())
		return 0;

	return ((read_cpuid_ext(CPUID_EXT_MMFR3) >> 12) & 0xf) < 2;
}
#endif

#if !defined(CONFIG_SMP) || __LINUX_ARM_ARCH__ >= 7
#define cache_ops_need_broadcast()	0
#else
static inline int cache_ops_need_broadcast(void)
{
	if (!is_smp())
		return 0;

	return ((read_cpuid_ext(CPUID_EXT_MMFR3) >> 12) & 0xf) < 1;
}
#endif

/*
 * Logical CPU mapping.
 */
extern u32 __cpu_logical_map[];
#define cpu_logical_map(cpu)	__cpu_logical_map[cpu]
/*
 * Retrieve logical cpu index corresponding to a given MPIDR[23:0]
 *  - mpidr: MPIDR[23:0] to be used for the look-up
 *
 * Returns the cpu logical index or -EINVAL on look-up error
 */
static inline int get_logical_index(u32 mpidr)
{
	int cpu;
	for (cpu = 0; cpu < nr_cpu_ids; cpu++)
		if (cpu_logical_map(cpu) == mpidr)
			return cpu;
	return -EINVAL;
}

/*
 * NOTE ! Assembly code relies on the following
 * structure memory layout in order to carry out load
 * multiple from its base address. For more
 * information check arch/arm/kernel/sleep.S
 */
struct mpidr_hash {
	u32	mask; /* used by sleep.S */
	u32	shift_aff[3]; /* used by sleep.S */
	u32	bits;
};

extern struct mpidr_hash mpidr_hash;

static inline u32 mpidr_hash_size(void)
{
	return 1 << mpidr_hash.bits;
}

extern int platform_can_secondary_boot(void);
extern int platform_can_cpu_hotplug(void);

#ifdef CONFIG_HOTPLUG_CPU
extern int platform_can_hotplug_cpu(unsigned int cpu);
#else
static inline int platform_can_hotplug_cpu(unsigned int cpu)
{
	return 0;
}
#endif

#endif

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Name Type Size Permission Actions
hardware Folder 0755
mach Folder 0755
xen Folder 0755
Kbuild File 568 B 0644
arch_gicv3.h File 9.05 KB 0644
arch_timer.h File 2.48 KB 0644
arm-cci.h File 1.05 KB 0644
asm-offsets.h File 35 B 0644
assembler.h File 10.46 KB 0644
atomic.h File 13.22 KB 0644
auxvec.h File 29 B 0644
bL_switcher.h File 2.28 KB 0644
barrier.h File 2.84 KB 0644
bitops.h File 8.62 KB 0644
bitrev.h File 451 B 0644
bug.h File 2.46 KB 0644
bugs.h File 546 B 0644
cache.h File 813 B 0644
cacheflush.h File 15.54 KB 0644
cachetype.h File 2.71 KB 0644
checksum.h File 3.71 KB 0644
clocksource.h File 153 B 0644
cmpxchg.h File 6.14 KB 0644
compiler.h File 978 B 0644
cp15.h File 3.84 KB 0644
cpu.h File 533 B 0644
cpufeature.h File 1.4 KB 0644
cpuidle.h File 1.33 KB 0644
cputype.h File 8.42 KB 0644
cti.h File 3.62 KB 0644
dcc.h File 1.01 KB 0644
delay.h File 2.83 KB 0644
device.h File 771 B 0644
div64.h File 3.17 KB 0644
dma-contiguous.h File 265 B 0644
dma-iommu.h File 1.01 KB 0644
dma-mapping.h File 7.44 KB 0644
dma.h File 4.18 KB 0644
dmi.h File 528 B 0644
domain.h File 3.65 KB 0644
ecard.h File 5.98 KB 0644
edac.h File 1.51 KB 0644
efi.h File 3.04 KB 0644
elf.h File 4.52 KB 0644
entry-macro-multi.S File 726 B 0644
exception.h File 571 B 0644
fb.h File 375 B 0644
fiq.h File 1.36 KB 0644
firmware.h File 1.82 KB 0644
fixmap.h File 1.84 KB 0644
flat.h File 915 B 0644
floppy.h File 3.61 KB 0644
fncpy.h File 3.08 KB 0644
fpstate.h File 1.73 KB 0644
ftrace.h File 1.92 KB 0644
futex.h File 4.24 KB 0644
glue-cache.h File 3.51 KB 0644
glue-df.h File 2.2 KB 0644
glue-pf.h File 1.12 KB 0644
glue-proc.h File 4.46 KB 0644
glue.h File 759 B 0644
gpio.h File 693 B 0644
hardirq.h File 803 B 0644
highmem.h File 2.15 KB 0644
hugetlb-3level.h File 2.03 KB 0644
hugetlb.h File 1.78 KB 0644
hw_breakpoint.h File 3.53 KB 0644
hw_irq.h File 349 B 0644
hwcap.h File 378 B 0644
hypervisor.h File 140 B 0644
ide.h File 566 B 0644
idmap.h File 355 B 0644
insn.h File 636 B 0644
io.h File 15.96 KB 0644
irq.h File 1015 B 0644
irq_work.h File 234 B 0644
irqflags.h File 3.88 KB 0644
jump_label.h File 1009 B 0644
kexec-internal.h File 272 B 0644
kexec.h File 2.3 KB 0644
kgdb.h File 2.72 KB 0644
kmap_types.h File 190 B 0644
kprobes.h File 2.65 KB 0644
kvm_arm.h File 7.6 KB 0644
kvm_asm.h File 2.84 KB 0644
kvm_coproc.h File 1.99 KB 0644
kvm_emulate.h File 7.84 KB 0644
kvm_host.h File 10.31 KB 0644
kvm_hyp.h File 4.49 KB 0644
kvm_mmio.h File 1.34 KB 0644
kvm_mmu.h File 7.27 KB 0644
limits.h File 166 B 0644
linkage.h File 216 B 0644
mc146818rtc.h File 720 B 0644
mcpm.h File 11.92 KB 0644
mcs_spinlock.h File 570 B 0644
memblock.h File 248 B 0644
memory.h File 9.95 KB 0644
mmu.h File 953 B 0644
mmu_context.h File 3.94 KB 0644
module.h File 1.57 KB 0644
mpu.h File 2.15 KB 0644
mtd-xip.h File 666 B 0644
neon.h File 1.16 KB 0644
nwflash.h File 252 B 0644
opcodes-sec.h File 742 B 0644
opcodes-virt.h File 1.32 KB 0644
opcodes.h File 8.07 KB 0644
outercache.h File 3.78 KB 0644
page-nommu.h File 957 B 0644
page.h File 3.61 KB 0644
paravirt.h File 454 B 0644
patch.h File 438 B 0644
pci.h File 956 B 0644
percpu.h File 1.56 KB 0644
perf_event.h File 857 B 0644
pgalloc.h File 3.79 KB 0644
pgtable-2level-hwdef.h File 3.45 KB 0644
pgtable-2level-types.h File 1.84 KB 0644
pgtable-2level.h File 8.51 KB 0644
pgtable-3level-hwdef.h File 3.95 KB 0644
pgtable-3level-types.h File 1.89 KB 0644
pgtable-3level.h File 9.54 KB 0644
pgtable-hwdef.h File 467 B 0644
pgtable-nommu.h File 2.51 KB 0644
pgtable.h File 11.71 KB 0644
probes.h File 1.73 KB 0644
proc-fns.h File 4.79 KB 0644
processor.h File 3.4 KB 0644
procinfo.h File 1.27 KB 0644
prom.h File 715 B 0644
psci.h File 771 B 0644
ptrace.h File 4.89 KB 0644
sections.h File 189 B 0644
set_memory.h File 1.04 KB 0644
setup.h File 934 B 0644
shmparam.h File 419 B 0644
signal.h File 500 B 0644
smp.h File 3.1 KB 0644
smp_plat.h File 2.48 KB 0644
smp_scu.h File 1.32 KB 0644
smp_twd.h File 908 B 0644
sparsemem.h File 716 B 0644
spectre.h File 906 B 0644
spinlock.h File 5.49 KB 0644
spinlock_types.h File 541 B 0644
stackprotector.h File 1.09 KB 0644
stacktrace.h File 742 B 0644
stage2_pgtable.h File 2.12 KB 0644
string.h File 1.43 KB 0644
suspend.h File 369 B 0644
swab.h File 1005 B 0644
switch_to.h File 1.03 KB 0644
sync_bitops.h File 1.03 KB 0644
syscall.h File 2.48 KB 0644
system_info.h File 763 B 0644
system_misc.h File 1.14 KB 0644
tcm.h File 937 B 0644
therm.h File 655 B 0644
thread_info.h File 5.2 KB 0644
thread_notify.h File 1.2 KB 0644
timex.h File 577 B 0644
tlb.h File 7.37 KB 0644
tlbflush.h File 17.88 KB 0644
tls.h File 3.09 KB 0644
topology.h File 1.18 KB 0644
traps.h File 1.17 KB 0644
trusted_foundations.h File 2.29 KB 0644
uaccess-asm.h File 2.83 KB 0644
uaccess.h File 16.22 KB 0644
ucontext.h File 2.98 KB 0644
unaligned.h File 846 B 0644
unified.h File 1.61 KB 0644
unistd.h File 1.68 KB 0644
unwind.h File 1.71 KB 0644
uprobes.h File 1.07 KB 0644
user.h File 4.2 KB 0644
v7m.h File 2.93 KB 0644
vdso.h File 507 B 0644
vdso_datapage.h File 1.69 KB 0644
vfp.h File 2.86 KB 0644
vfpmacros.h File 2.1 KB 0644
vga.h File 305 B 0644
virt.h File 2.9 KB 0644
word-at-a-time.h File 2.08 KB 0644
xor.h File 5.22 KB 0644