mirror of
https://github.com/torvalds/linux.git
synced 2024-11-08 13:11:45 +00:00
43e40f25d2
Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Michael Kerrisk <mtk.manpages@gmail.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Dave Jones <davej@redhat.com>
67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
#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 */
|