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/*
 * Based on arch/arm/include/asm/processor.h
 *
 * Copyright (C) 1995-1999 Russell King
 * Copyright (C) 2012 ARM Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef __ASM_PROCESSOR_H
#define __ASM_PROCESSOR_H

#define TASK_SIZE_64		(UL(1) << VA_BITS)

#define KERNEL_DS	UL(-1)
#define USER_DS		(TASK_SIZE_64 - 1)

#ifndef __ASSEMBLY__

/*
 * Default implementation of macro that returns current
 * instruction pointer ("program counter").
 */
#define current_text_addr() ({ __label__ _l; _l: &&_l;})

#ifdef __KERNEL__

#include <linux/string.h>

#include <asm/alternative.h>
#include <asm/cpufeature.h>
#include <asm/fpsimd.h>
#include <asm/hw_breakpoint.h>
#include <asm/lse.h>
#include <asm/pgtable-hwdef.h>
#include <asm/ptrace.h>
#include <asm/types.h>

/*
 * TASK_SIZE - the maximum size of a user space task.
 * TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area.
 */
#ifdef CONFIG_COMPAT
#ifdef CONFIG_ARM64_64K_PAGES
/*
 * With CONFIG_ARM64_64K_PAGES enabled, the last page is occupied
 * by the compat vectors page.
 */
#define TASK_SIZE_32		UL(0x100000000)
#else
#define TASK_SIZE_32		(UL(0x100000000) - PAGE_SIZE)
#endif /* CONFIG_ARM64_64K_PAGES */
#define TASK_SIZE		(test_thread_flag(TIF_32BIT) ? \
				TASK_SIZE_32 : TASK_SIZE_64)
#define TASK_SIZE_OF(tsk)	(test_tsk_thread_flag(tsk, TIF_32BIT) ? \
				TASK_SIZE_32 : TASK_SIZE_64)
#else
#define TASK_SIZE		TASK_SIZE_64
#endif /* CONFIG_COMPAT */

#define TASK_UNMAPPED_BASE	(PAGE_ALIGN(TASK_SIZE / 4))

#define STACK_TOP_MAX		TASK_SIZE_64
#ifdef CONFIG_COMPAT
#define AARCH32_VECTORS_BASE	0xffff0000
#define STACK_TOP		(test_thread_flag(TIF_32BIT) ? \
				AARCH32_VECTORS_BASE : STACK_TOP_MAX)
#else
#define STACK_TOP		STACK_TOP_MAX
#endif /* CONFIG_COMPAT */

extern phys_addr_t arm64_dma_phys_limit;
#define ARCH_LOW_ADDRESS_LIMIT	(arm64_dma_phys_limit - 1)

struct debug_info {
#ifdef CONFIG_HAVE_HW_BREAKPOINT
	/* Have we suspended stepping by a debugger? */
	int			suspended_step;
	/* Allow breakpoints and watchpoints to be disabled for this thread. */
	int			bps_disabled;
	int			wps_disabled;
	/* Hardware breakpoints pinned to this task. */
	struct perf_event	*hbp_break[ARM_MAX_BRP];
	struct perf_event	*hbp_watch[ARM_MAX_WRP];
#endif
};

struct cpu_context {
	unsigned long x19;
	unsigned long x20;
	unsigned long x21;
	unsigned long x22;
	unsigned long x23;
	unsigned long x24;
	unsigned long x25;
	unsigned long x26;
	unsigned long x27;
	unsigned long x28;
	unsigned long fp;
	unsigned long sp;
	unsigned long pc;
};

struct thread_struct {
	struct cpu_context	cpu_context;	/* cpu context */
	unsigned long		tp_value;	/* TLS register */
#ifdef CONFIG_COMPAT
	unsigned long		tp2_value;
#endif
	struct fpsimd_state	fpsimd_state;
	void			*sve_state;	/* SVE registers, if any */
	unsigned int		sve_vl;		/* SVE vector length */
	unsigned int		sve_vl_onexec;	/* SVE vl after next exec */
	unsigned long		fault_address;	/* fault info */
	unsigned long		fault_code;	/* ESR_EL1 value */
	struct debug_info	debug;		/* debugging */
};

#ifdef CONFIG_COMPAT
#define task_user_tls(t)						\
({									\
	unsigned long *__tls;						\
	if (is_compat_thread(task_thread_info(t)))			\
		__tls = &(t)->thread.tp2_value;				\
	else								\
		__tls = &(t)->thread.tp_value;				\
	__tls;								\
 })
#else
#define task_user_tls(t)	(&(t)->thread.tp_value)
#endif

/* Sync TPIDR_EL0 back to thread_struct for current */
void tls_preserve_current_state(void);

#define INIT_THREAD  {	}

static inline void start_thread_common(struct pt_regs *regs, unsigned long pc)
{
	s32 previous_syscall = regs->syscallno;
	memset(regs, 0, sizeof(*regs));
	regs->syscallno = previous_syscall;
	regs->pc = pc;
}

static inline void set_ssbs_bit(struct pt_regs *regs)
{
	regs->pstate |= PSR_SSBS_BIT;
}

static inline void set_compat_ssbs_bit(struct pt_regs *regs)
{
	regs->pstate |= PSR_AA32_SSBS_BIT;
}

static inline void start_thread(struct pt_regs *regs, unsigned long pc,
				unsigned long sp)
{
	start_thread_common(regs, pc);
	regs->pstate = PSR_MODE_EL0t;

	if (arm64_get_ssbd_state() != ARM64_SSBD_FORCE_ENABLE)
		set_ssbs_bit(regs);

	regs->sp = sp;
}

#ifdef CONFIG_COMPAT
static inline void compat_start_thread(struct pt_regs *regs, unsigned long pc,
				       unsigned long sp)
{
	start_thread_common(regs, pc);
	regs->pstate = COMPAT_PSR_MODE_USR;
	if (pc & 1)
		regs->pstate |= COMPAT_PSR_T_BIT;

#ifdef __AARCH64EB__
	regs->pstate |= COMPAT_PSR_E_BIT;
#endif

	if (arm64_get_ssbd_state() != ARM64_SSBD_FORCE_ENABLE)
		set_compat_ssbs_bit(regs);

	regs->compat_sp = sp;
}
#endif

/* Forward declaration, a strange C thing */
struct task_struct;

/* Free all resources held by a thread. */
extern void release_thread(struct task_struct *);

unsigned long get_wchan(struct task_struct *p);

static inline void cpu_relax(void)
{
	asm volatile("yield" ::: "memory");
}

/* Thread switching */
extern struct task_struct *cpu_switch_to(struct task_struct *prev,
					 struct task_struct *next);

#define task_pt_regs(p) \
	((struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1)

#define KSTK_EIP(tsk)	((unsigned long)task_pt_regs(tsk)->pc)
#define KSTK_ESP(tsk)	user_stack_pointer(task_pt_regs(tsk))

/*
 * Prefetching support
 */
#define ARCH_HAS_PREFETCH
static inline void prefetch(const void *ptr)
{
	asm volatile("prfm pldl1keep, %a0\n" : : "p" (ptr));
}

#define ARCH_HAS_PREFETCHW
static inline void prefetchw(const void *ptr)
{
	asm volatile("prfm pstl1keep, %a0\n" : : "p" (ptr));
}

#define ARCH_HAS_SPINLOCK_PREFETCH
static inline void spin_lock_prefetch(const void *ptr)
{
	asm volatile(ARM64_LSE_ATOMIC_INSN(
		     "prfm pstl1strm, %a0",
		     "nop") : : "p" (ptr));
}

#define HAVE_ARCH_PICK_MMAP_LAYOUT

#endif

void cpu_enable_pan(const struct arm64_cpu_capabilities *__unused);
void cpu_enable_cache_maint_trap(const struct arm64_cpu_capabilities *__unused);
void cpu_clear_disr(const struct arm64_cpu_capabilities *__unused);

/* Userspace interface for PR_SVE_{SET,GET}_VL prctl()s: */
#define SVE_SET_VL(arg)	sve_set_current_vl(arg)
#define SVE_GET_VL()	sve_get_current_vl()

#endif /* __ASSEMBLY__ */
#endif /* __ASM_PROCESSOR_H */

Filemanager

Name Type Size Permission Actions
xen Folder 0755
Kbuild File 703 B 0644
acenv.h File 541 B 0644
acpi.h File 4.34 KB 0644
alternative.h File 7.63 KB 0644
arch_gicv3.h File 3.44 KB 0644
arch_timer.h File 4.87 KB 0644
arm-cci.h File 794 B 0644
asm-bug.h File 1.45 KB 0644
asm-offsets.h File 35 B 0644
asm-uaccess.h File 2.09 KB 0644
assembler.h File 13.51 KB 0644
atomic.h File 8.35 KB 0644
atomic_ll_sc.h File 10.62 KB 0644
atomic_lse.h File 14.82 KB 0644
barrier.h File 3.78 KB 0644
bitops.h File 1.9 KB 0644
bitrev.h File 452 B 0644
boot.h File 384 B 0644
brk-imm.h File 706 B 0644
bug.h File 1.09 KB 0644
cache.h File 2.23 KB 0644
cacheflush.h File 4.87 KB 0644
checksum.h File 1.35 KB 0644
clocksource.h File 192 B 0644
cmpxchg.h File 7.98 KB 0644
compat.h File 7.15 KB 0644
compiler.h File 1.18 KB 0644
cpu.h File 1.84 KB 0644
cpu_ops.h File 2.73 KB 0644
cpucaps.h File 1.83 KB 0644
cpufeature.h File 19.14 KB 0644
cpuidle.h File 401 B 0644
cputype.h File 8.1 KB 0644
current.h File 517 B 0644
daifflags.h File 1.59 KB 0644
dcc.h File 1.36 KB 0644
debug-monitors.h File 3.76 KB 0644
device.h File 886 B 0644
dma-mapping.h File 2.42 KB 0644
dmi.h File 850 B 0644
efi.h File 4.57 KB 0644
elf.h File 5.7 KB 0644
esr.h File 9.02 KB 0644
exception.h File 1.21 KB 0644
exec.h File 868 B 0644
extable.h File 815 B 0644
fb.h File 1000 B 0644
fixmap.h File 2.91 KB 0644
fpsimd.h File 4.21 KB 0644
fpsimdmacros.h File 5.62 KB 0644
ftrace.h File 1.92 KB 0644
futex.h File 3.41 KB 0644
hardirq.h File 2.08 KB 0644
hugetlb.h File 2.71 KB 0644
hw_breakpoint.h File 4.46 KB 0644
hwcap.h File 1.86 KB 0644
hypervisor.h File 144 B 0644
insn.h File 16.03 KB 0644
io.h File 7.72 KB 0644
irq.h File 307 B 0644
irq_work.h File 228 B 0644
irqflags.h File 2.3 KB 0644
jump_label.h File 1.68 KB 0644
kasan.h File 1.16 KB 0644
kernel-pgtable.h File 4.03 KB 0644
kexec.h File 2.42 KB 0644
kgdb.h File 3.79 KB 0644
kprobes.h File 1.74 KB 0644
kvm_arm.h File 8.38 KB 0644
kvm_asm.h File 4.26 KB 0644
kvm_coproc.h File 2.04 KB 0644
kvm_emulate.h File 10.38 KB 0644
kvm_host.h File 15.73 KB 0644
kvm_hyp.h File 5.79 KB 0644
kvm_mmio.h File 1.3 KB 0644
kvm_mmu.h File 11.72 KB 0644
linkage.h File 114 B 0644
lse.h File 1.26 KB 0644
memblock.h File 720 B 0644
memory.h File 9.32 KB 0644
mmu.h File 2.74 KB 0644
mmu_context.h File 6.35 KB 0644
mmzone.h File 266 B 0644
module.h File 2.8 KB 0644
neon.h File 815 B 0644
numa.h File 1.33 KB 0644
page-def.h File 1.17 KB 0644
page.h File 1.61 KB 0644
paravirt.h File 458 B 0644
pci.h File 878 B 0644
percpu.h File 7.48 KB 0644
perf_event.h File 3.17 KB 0644
pgalloc.h File 3.71 KB 0644
pgtable-hwdef.h File 9.4 KB 0644
pgtable-prot.h File 4.38 KB 0644
pgtable-types.h File 1.84 KB 0644
pgtable.h File 21.55 KB 0644
probes.h File 1022 B 0644
proc-fns.h File 1.21 KB 0644
processor.h File 6.52 KB 0644
ptdump.h File 1.42 KB 0644
ptrace.h File 9 KB 0644
sdei.h File 1.46 KB 0644
seccomp.h File 714 B 0644
sections.h File 1.46 KB 0644
shmparam.h File 965 B 0644
signal32.h File 1.45 KB 0644
simd.h File 1.39 KB 0644
smp.h File 4.23 KB 0644
smp_plat.h File 1.43 KB 0644
sparsemem.h File 771 B 0644
spinlock.h File 3.33 KB 0644
spinlock_types.h File 1.06 KB 0644
stack_pointer.h File 247 B 0644
stackprotector.h File 1.11 KB 0644
stacktrace.h File 2.53 KB 0644
stage2_pgtable-nopmd.h File 1.3 KB 0644
stage2_pgtable-nopud.h File 1.24 KB 0644
stage2_pgtable.h File 4.89 KB 0644
stat.h File 1.43 KB 0644
string.h File 2.33 KB 0644
suspend.h File 1.65 KB 0644
sync_bitops.h File 1.11 KB 0644
syscall.h File 2.87 KB 0644
sysreg.h File 25.1 KB 0644
system_misc.h File 1.86 KB 0644
thread_info.h File 3.93 KB 0644
timex.h File 883 B 0644
tlb.h File 2.22 KB 0644
tlbflush.h File 5.38 KB 0644
topology.h File 1.29 KB 0644
traps.h File 3.33 KB 0644
uaccess.h File 12.01 KB 0644
unistd.h File 1.6 KB 0644
unistd32.h File 27.53 KB 0644
uprobes.h File 777 B 0644
vdso.h File 1.09 KB 0644
vdso_datapage.h File 1.53 KB 0644
vectors.h File 1.75 KB 0644
virt.h File 3 KB 0644
vmap_stack.h File 769 B 0644
word-at-a-time.h File 2.22 KB 0644