From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/ia64/include/uapi/asm/rse.h | 67 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 arch/ia64/include/uapi/asm/rse.h (limited to 'arch/ia64/include/uapi/asm/rse.h') diff --git a/arch/ia64/include/uapi/asm/rse.h b/arch/ia64/include/uapi/asm/rse.h new file mode 100644 index 000000000..6d260af57 --- /dev/null +++ b/arch/ia64/include/uapi/asm/rse.h @@ -0,0 +1,67 @@ +/* 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 + * + * 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 */ -- cgit v1.2.3