1// SPDX-License-Identifier: GPL-2.0 OR MIT
  2/*
  3 * Copyright 2021 VMware, Inc., Palo Alto, CA., USA
  4 *
  5 * Permission is hereby granted, free of charge, to any person obtaining a
  6 * copy of this software and associated documentation files (the
  7 * "Software"), to deal in the Software without restriction, including
  8 * without limitation the rights to use, copy, modify, merge, publish,
  9 * distribute, sub license, and/or sell copies of the Software, and to
 10 * permit persons to whom the Software is furnished to do so, subject to
 11 * the following conditions:
 12 *
 13 * The above copyright notice and this permission notice (including the
 14 * next paragraph) shall be included in all copies or substantial portions
 15 * of the Software.
 16 *
 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 19 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 20 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
 21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 23 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 24 *
 25 */
 26#ifndef _VMWGFX_MSG_ARM64_H
 27#define _VMWGFX_MSG_ARM64_H
 28
 29#if defined(__aarch64__)
 30
 31#define VMWARE_HYPERVISOR_PORT    0x5658
 32#define VMWARE_HYPERVISOR_PORT_HB 0x5659
 33
 34#define VMWARE_HYPERVISOR_HB  BIT(0)
 35#define VMWARE_HYPERVISOR_OUT BIT(1)
 36
 37#define X86_IO_MAGIC 0x86
 38
 39#define X86_IO_W7_SIZE_SHIFT 0
 40#define X86_IO_W7_SIZE_MASK (0x3 << X86_IO_W7_SIZE_SHIFT)
 41#define X86_IO_W7_DIR       (1 << 2)
 42#define X86_IO_W7_WITH	    (1 << 3)
 43#define X86_IO_W7_STR	    (1 << 4)
 44#define X86_IO_W7_DF	    (1 << 5)
 45#define X86_IO_W7_IMM_SHIFT  5
 46#define X86_IO_W7_IMM_MASK  (0xff << X86_IO_W7_IMM_SHIFT)
 47
 48static inline void vmw_port(unsigned long cmd, unsigned long in_ebx,
 49			    unsigned long in_si, unsigned long in_di,
 50			    unsigned long flags, unsigned long magic,
 51			    unsigned long *eax, unsigned long *ebx,
 52			    unsigned long *ecx, unsigned long *edx,
 53			    unsigned long *si, unsigned long *di)
 54{
 55	register u64 x0 asm("x0") = magic;
 56	register u64 x1 asm("x1") = in_ebx;
 57	register u64 x2 asm("x2") = cmd;
 58	register u64 x3 asm("x3") = flags | VMWARE_HYPERVISOR_PORT;
 59	register u64 x4 asm("x4") = in_si;
 60	register u64 x5 asm("x5") = in_di;
 61
 62	register u64 x7 asm("x7") = ((u64)X86_IO_MAGIC << 32) |
 63				    X86_IO_W7_WITH |
 64				    X86_IO_W7_DIR |
 65				    (2 << X86_IO_W7_SIZE_SHIFT);
 66
 67	asm volatile("mrs xzr, mdccsr_el0 \n\t"
 68		     : "+r"(x0), "+r"(x1), "+r"(x2),
 69		       "+r"(x3), "+r"(x4), "+r"(x5)
 70		     : "r"(x7)
 71		     :);
 72	*eax = x0;
 73	*ebx = x1;
 74	*ecx = x2;
 75	*edx = x3;
 76	*si = x4;
 77	*di = x5;
 78}
 79
 80static inline void vmw_port_hb(unsigned long cmd, unsigned long in_ecx,
 81			       unsigned long in_si, unsigned long in_di,
 82			       unsigned long flags, unsigned long magic,
 83			       unsigned long bp, u32 w7dir,
 84			       unsigned long *eax, unsigned long *ebx,
 85			       unsigned long *ecx, unsigned long *edx,
 86			       unsigned long *si, unsigned long *di)
 87{
 88	register u64 x0 asm("x0") = magic;
 89	register u64 x1 asm("x1") = cmd;
 90	register u64 x2 asm("x2") = in_ecx;
 91	register u64 x3 asm("x3") = flags | VMWARE_HYPERVISOR_PORT_HB;
 92	register u64 x4 asm("x4") = in_si;
 93	register u64 x5 asm("x5") = in_di;
 94	register u64 x6 asm("x6") = bp;
 95	register u64 x7 asm("x7") = ((u64)X86_IO_MAGIC << 32) |
 96				    X86_IO_W7_STR |
 97				    X86_IO_W7_WITH |
 98				    w7dir;
 99
100	asm volatile("mrs xzr, mdccsr_el0 \n\t"
101		     : "+r"(x0), "+r"(x1), "+r"(x2),
102		       "+r"(x3), "+r"(x4), "+r"(x5)
103		     : "r"(x6), "r"(x7)
104		     :);
105	*eax = x0;
106	*ebx = x1;
107	*ecx = x2;
108	*edx = x3;
109	*si  = x4;
110	*di  = x5;
111}
112
113#define VMW_PORT(cmd, in_ebx, in_si, in_di, flags, magic, eax, ebx, ecx, edx,  \
114		 si, di)                                                       \
115	vmw_port(cmd, in_ebx, in_si, in_di, flags, magic, &eax, &ebx, &ecx,    \
116		 &edx, &si, &di)
117
118#define VMW_PORT_HB_OUT(cmd, in_ecx, in_si, in_di, flags, magic, bp, eax, ebx, \
119		        ecx, edx, si, di)                                      \
120	vmw_port_hb(cmd, in_ecx, in_si, in_di, flags, magic, bp,               \
121                    0, &eax, &ebx, &ecx, &edx, &si, &di)
122
123#define VMW_PORT_HB_IN(cmd, in_ecx, in_si, in_di, flags, magic, bp, eax, ebx,  \
124		       ecx, edx, si, di)                                       \
125	vmw_port_hb(cmd, in_ecx, in_si, in_di, flags, magic, bp,               \
126		    X86_IO_W7_DIR, &eax, &ebx, &ecx, &edx, &si, &di)
127
128#endif
129
130#endif /* _VMWGFX_MSG_ARM64_H */