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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _ASM_IA64_RSE_H
#define _ASM_IA64_RSE_H

/*
 * Copyright (C) 1998, 1999 Hewlett-Packard Co
 * Copyright (C) 1998, 1999 David Mosberger-Tang <davidm@hpl.hp.com>
 *
 * Register stack engine related helper functions.  This file may be
 * used in applications, so be careful about the name-space and give
 * some consideration to non-GNU C compilers (though __inline__ is
 * fine).
 */

static __inline__ unsigned long
ia64_rse_slot_num (unsigned long *addr)
{
	return (((unsigned long) addr) >> 3) & 0x3f;
}

/*
 * Return TRUE if ADDR is the address of an RNAT slot.
 */
static __inline__ unsigned long
ia64_rse_is_rnat_slot (unsigned long *addr)
{
	return ia64_rse_slot_num(addr) == 0x3f;
}

/*
 * Returns the address of the RNAT slot that covers the slot at
 * address SLOT_ADDR.
 */
static __inline__ unsigned long *
ia64_rse_rnat_addr (unsigned long *slot_addr)
{
	return (unsigned long *) ((unsigned long) slot_addr | (0x3f << 3));
}

/*
 * Calculate the number of registers in the dirty partition starting at BSPSTORE and
 * ending at BSP.  This isn't simply (BSP-BSPSTORE)/8 because every 64th slot stores
 * ar.rnat.
 */
static __inline__ unsigned long
ia64_rse_num_regs (unsigned long *bspstore, unsigned long *bsp)
{
	unsigned long slots = (bsp - bspstore);

	return slots - (ia64_rse_slot_num(bspstore) + slots)/0x40;
}

/*
 * The inverse of the above: given bspstore and the number of
 * registers, calculate ar.bsp.
 */
static __inline__ unsigned long *
ia64_rse_skip_regs (unsigned long *addr, long num_regs)
{
	long delta = ia64_rse_slot_num(addr) + num_regs;

	if (num_regs < 0)
		delta -= 0x3e;
	return addr + num_regs + delta/0x3f;
}

#endif /* _ASM_IA64_RSE_H */

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Name Type Size Permission Actions
Kbuild File 125 B 0644
auxvec.h File 407 B 0644
bitsperlong.h File 234 B 0644
break.h File 538 B 0644
byteorder.h File 203 B 0644
cmpxchg.h File 4.11 KB 0644
errno.h File 94 B 0644
fcntl.h File 388 B 0644
fpu.h File 2.22 KB 0644
gcc_intrin.h File 18.07 KB 0644
ia64regs.h File 2.81 KB 0644
intel_intrin.h File 4.88 KB 0644
intrinsics.h File 4.06 KB 0644
ioctl.h File 94 B 0644
ioctls.h File 183 B 0644
ipcbuf.h File 95 B 0644
mman.h File 388 B 0644
msgbuf.h File 930 B 0644
param.h File 670 B 0644
perfmon.h File 6.2 KB 0644
perfmon_default_smpl.h File 3.47 KB 0644
poll.h File 93 B 0644
posix_types.h File 268 B 0644
ptrace.h File 8.1 KB 0644
ptrace_offsets.h File 6.38 KB 0644
resource.h File 215 B 0644
rse.h File 1.71 KB 0644
sembuf.h File 678 B 0644
setup.h File 924 B 0644
shmbuf.h File 1.09 KB 0644
sigcontext.h File 3.07 KB 0644
siginfo.h File 3.06 KB 0644
signal.h File 3.32 KB 0644
socket.h File 2.33 KB 0644
sockios.h File 559 B 0644
stat.h File 1.1 KB 0644
statfs.h File 555 B 0644
swab.h File 781 B 0644
termbits.h File 4.75 KB 0644
termios.h File 1.21 KB 0644
types.h File 866 B 0644
ucontext.h File 360 B 0644
unistd.h File 9.85 KB 0644
ustack.h File 296 B 0644