mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-18 02:38:56 +00:00
78 lines
2.7 KiB
ArmAsm
78 lines
2.7 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0
|
|
*
|
|
* hypercall.S
|
|
*
|
|
* Xen hypercall wrappers
|
|
*
|
|
* Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Citrix, 2012
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License version 2
|
|
* as published by the Free Software Foundation; or, when distributed
|
|
* separately from the Linux kernel or incorporated into other
|
|
* software packages, subject to the following license:
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this source file (the "Software"), to deal in the Software without
|
|
* restriction, including without limitation the rights to use, copy, modify,
|
|
* merge, publish, distribute, sublicense, and/or sell copies of the Software,
|
|
* and to permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
* IN THE SOFTWARE.
|
|
*/
|
|
|
|
/*
|
|
* The Xen hypercall calling convention is very similar to the procedure
|
|
* call standard for the ARM 64-bit architecture: the first parameter is
|
|
* passed in x0, the second in x1, the third in x2, the fourth in x3 and
|
|
* the fifth in x4.
|
|
*
|
|
* The hypercall number is passed in x16.
|
|
*
|
|
* The return value is in x0.
|
|
*
|
|
* The hvc ISS is required to be 0xEA1, that is the Xen specific ARM
|
|
* hypercall tag.
|
|
*
|
|
* Parameter structs passed to hypercalls are laid out according to
|
|
* the ARM 64-bit EABI standard.
|
|
*/
|
|
|
|
#include <xen/interface/xen.h>
|
|
|
|
#define XEN_HYPERCALL_TAG 0xEA1
|
|
|
|
#define HYPERCALL_SIMPLE(hypercall) \
|
|
.globl HYPERVISOR_##hypercall; \
|
|
.align 4,0x90; \
|
|
HYPERVISOR_##hypercall: \
|
|
mov x16, #__HYPERVISOR_##hypercall; \
|
|
hvc XEN_HYPERCALL_TAG; \
|
|
ret; \
|
|
|
|
#define HYPERCALL0 HYPERCALL_SIMPLE
|
|
#define HYPERCALL1 HYPERCALL_SIMPLE
|
|
#define HYPERCALL2 HYPERCALL_SIMPLE
|
|
#define HYPERCALL3 HYPERCALL_SIMPLE
|
|
#define HYPERCALL4 HYPERCALL_SIMPLE
|
|
#define HYPERCALL5 HYPERCALL_SIMPLE
|
|
|
|
.text
|
|
|
|
HYPERCALL2(xen_version);
|
|
HYPERCALL3(console_io);
|
|
HYPERCALL3(grant_table_op);
|
|
HYPERCALL2(sched_op);
|
|
HYPERCALL2(event_channel_op);
|
|
HYPERCALL2(hvm_op);
|
|
HYPERCALL2(memory_op);
|