arch/arch.h

#ifndef ARCH_H
#define ARCH_H

#ifdef __cplusplus
#include <atomic>
#else
#include <stdatomic.h>
#endif

#include "../lib/types.h"

enum {
	arch_x86_64 = 1,
	arch_x86,
	arch_ppc,
	arch_ia64,
	arch_s390,
	arch_alpha,
	arch_sparc,
	arch_sparc64,
	arch_arm,
	arch_sh,
	arch_hppa,
	arch_mips,
	arch_aarch64,

	arch_generic,

	arch_nr,
};

enum {
	ARCH_FLAG_1	= 1 << 0,
	ARCH_FLAG_2	= 1 << 1,
	ARCH_FLAG_3	= 1 << 2,
	ARCH_FLAG_4	= 1 << 3,
};

extern unsigned long arch_flags;

#define ARCH_CPU_CLOCK_WRAPS

#ifdef __cplusplus
#define atomic_add(p, v)						\
	std::atomic_fetch_add(p, (v))
#define atomic_sub(p, v)						\
	std::atomic_fetch_sub(p, (v))
#define atomic_load_relaxed(p)					\
	std::atomic_load_explicit(p,				\
			     std::memory_order_relaxed)
#define atomic_load_acquire(p)					\
	std::atomic_load_explicit(p,				\
			     std::memory_order_acquire)
#define atomic_store_release(p, v)				\
	std::atomic_store_explicit(p, (v),			\
			     std::memory_order_release)
#else
#define atomic_add(p, v)					\
	atomic_fetch_add((_Atomic typeof(*(p)) *)(p), v)
#define atomic_sub(p, v)					\
	atomic_fetch_sub((_Atomic typeof(*(p)) *)(p), v)
#define atomic_load_relaxed(p)					\
	atomic_load_explicit((_Atomic typeof(*(p)) *)(p),	\
			     memory_order_relaxed)
#define atomic_load_acquire(p)					\
	atomic_load_explicit((_Atomic typeof(*(p)) *)(p),	\
			     memory_order_acquire)
#define atomic_store_release(p, v)				\
	atomic_store_explicit((_Atomic typeof(*(p)) *)(p), (v),	\
			      memory_order_release)
#endif

/* IWYU pragma: begin_exports */
#if defined(__i386__)
#include "arch-x86.h"
#elif defined(__x86_64__)
#include "arch-x86_64.h"
#elif defined(__powerpc__) || defined(__powerpc64__) || defined(__ppc__)
#include "arch-ppc.h"
#elif defined(__ia64__)
#include "arch-ia64.h"
#elif defined(__alpha__)
#include "arch-alpha.h"
#elif defined(__s390x__) || defined(__s390__)
#include "arch-s390.h"
#elif defined(__sparc__)
#include "arch-sparc.h"
#elif defined(__sparc64__)
#include "arch-sparc64.h"
#elif defined(__arm__)
#include "arch-arm.h"
#elif defined(__mips__) || defined(__mips64__)
#include "arch-mips.h"
#elif defined(__sh__)
#include "arch-sh.h"
#elif defined(__hppa__)
#include "arch-hppa.h"
#elif defined(__aarch64__)
#include "arch-aarch64.h"
#else
#warning "Unknown architecture, attempting to use generic model."
#include "arch-generic.h"
#endif

#include "../lib/ffz.h"
/* IWYU pragma: end_exports */

#ifndef ARCH_HAVE_INIT
static inline int arch_init(char *envp[])
{
	return 0;
}
#endif

#ifdef __alpha__
/*
 * alpha is the only exception, all other architectures
 * have common numbers for new system calls.
 */
# ifndef __NR_io_uring_setup
#  define __NR_io_uring_setup		535
# endif
# ifndef __NR_io_uring_enter
#  define __NR_io_uring_enter		536
# endif
# ifndef __NR_io_uring_register
#  define __NR_io_uring_register	537
# endif
#else /* !__alpha__ */
# ifndef __NR_io_uring_setup
#  define __NR_io_uring_setup		425
# endif
# ifndef __NR_io_uring_enter
#  define __NR_io_uring_enter		426
# endif
# ifndef __NR_io_uring_register
#  define __NR_io_uring_register	427
# endif
#endif

#define ARCH_HAVE_IOURING

#endif