source: mainline/kernel/arch/sparc64/include/arch/istate_struct.ag@ d70ebffe

# Copyright (c) 2014 Jakub Jermar 
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# - Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.
# - Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the distribution.
# - The name of the author may not be used to endorse or promote products
#   derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

{
        name : istate,

        includes : [
                {
                        guard : KERNEL,
                        include : <typedefs.h>
                },
                {
                        negative-guard : KERNEL,
                        include : <sys/types.h>
                }
        ],

        members : [

                #
                # Window save area for locals and inputs. Required by ABI.
                # Before using these, make sure that the corresponding register
                # window has been spilled into memory, otherwise l0-l7 and
                # i0-i7 will have undefined values.
                #
                {
                        name : l0,
                        type : uint64_t,
                },
                {
                        name : l1,
                        type : uint64_t,
                },
                {
                        name : l2,
                        type : uint64_t,
                },
                {
                        name : l3,
                        type : uint64_t,
                },
                {
                        name : l4,
                        type : uint64_t,
                },
                {
                        name : l5,
                        type : uint64_t,
                },
                {
                        name : l6,
                        type : uint64_t,
                },
                {
                        name : l7,
                        type : uint64_t,
                },
                {
                        name : i0,
                        type : uint64_t,
                },
                {
                        name : i1,
                        type : uint64_t,
                },
                {
                        name : i2,
                        type : uint64_t,
                },
                {
                        name : i3,
                        type : uint64_t,
                },
                {
                        name : i4,
                        type : uint64_t,
                },
                {
                        name : i5,
                        type : uint64_t,
                },
                {
                        name : i6,
                        type : uint64_t,
                },
                {
                        name : i7,
                        type : uint64_t,
                },

                #
                # Six mandatory argument slots, required by the ABI, plus an
                # optional argument slot for the 7th argument used by our
                # syscalls. Since the preemptible handler is always passing
                # integral arguments, undef_arg[0] - undef_arg[5] are always
                # undefined.
                #
                {
                        name : undef_arg,
                        type : uint64_t,
                        elements : 6,
                },
                {
                        name : arg6,
                        type : uint64_t,
                },

                #
                # From this point onwards, the istate layout is not dicated by
                # the ABI. The only requirement is the stack alignment.
                #

                {
                        name : tnpc,
                        type : uint64_t
                },
                {
                        name : tpc,
                        type : uint64_t
                },
                {
                        name : tstate,
                        type : uint64_t
                },
                {
                        name : y,
                        type : uint64_t,
                },

                #
                # At the moment, these are defined only when needed by the
                # preemptible handler, so consider them undefined for now.
                #
                {
                        name : o0,
                        type : uint64_t,
                },
                {
                        name : o1,
                        type : uint64_t,
                },
                {
                        name : o2,
                        type : uint64_t,
                },
                {
                        name : o3,
                        type : uint64_t,
                },
                {
                        name : o4,
                        type : uint64_t,
                },
                {
                        name : o5,
                        type : uint64_t,
                },
                {
                        name : o6,
                        type : uint64_t,
                },
                {
                        name : o7,
                        type : uint64_t,
                },

                #
                # I/DTLB Tag Access register or zero for non-MMU traps.
                #
                {
                        name : tlb_tag_access,
                        type : uint64_t
                }
        ]
}