LoongArch: Add Loongson Binary Translation syscall support

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

arch/loongarch/include/asm/errno.h

@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1995, 1999, 2001, 2002 by Ralf Baechle
+ * Copyright (C) 2020 Loongson Technology Co., Ltd.
+ */
+#ifndef _ASM_ERRNO_H
+#define _ASM_ERRNO_H
+
+#include <uapi/asm/errno.h>
+
+
+/* The biggest error number defined here or in <linux/errno.h>. */
+#define EMAXERRNO	1133
+
+#endif /* _ASM_ERRNO_H */

arch/loongarch/include/asm/trans_mips_syscalls.h

@@ -0,0 +1,110 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Loongson Technology Corporation Limited
+ * Authors: Hanlu Li <lihanlu@loongson.cn>
+ *
+ * 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.
+ */
+#ifndef _TRANS_MIPS_SYSCALLS_H
+#define _TRANS_MIPS_SYSCALLS_H
+
+#define M_ENOMSG		35
+#define M_EIDRM			36
+#define M_ECHRNG		37
+#define M_EL2NSYNC		38
+#define M_EL3HLT		39
+#define M_EL3RST		40
+#define M_ELNRNG		41
+#define M_EUNATCH		42
+#define M_ENOCSI		43
+#define M_EL2HLT		44
+#define M_EDEADLK		45
+#define M_ENOLCK		46
+#define M_EBADE			50
+#define M_EBADR			51
+#define M_EXFULL		52
+#define M_ENOANO		53
+#define M_EBADRQC		54
+#define M_EBADSLT		55
+#define M_EBFONT		59
+#define M_ENOSTR		60
+#define M_ENODATA		61
+#define M_ETIME			62
+#define M_ENOSR			63
+#define M_ENONET		64
+#define M_ENOPKG		65
+#define M_EREMOTE		66
+#define M_ENOLINK		67
+#define M_EADV			68
+#define M_ESRMNT		69
+#define M_ECOMM			70
+#define M_EPROTO		71
+#define M_EDOTDOT		73
+#define M_EMULTIHOP		74
+#define M_EBADMSG		77
+#define M_ENAMETOOLONG		78
+#define M_EOVERFLOW		79
+#define M_ENOTUNIQ		80
+#define M_EBADFD		81
+#define M_EREMCHG		82
+#define M_ELIBACC		83
+#define M_ELIBBAD		84
+#define M_ELIBSCN		85
+#define M_ELIBMAX		86
+#define M_ELIBEXEC		87
+#define M_EILSEQ		88
+#define M_ENOSYS		89
+#define M_ELOOP			90
+#define M_ERESTART		91
+#define M_ESTRPIPE		92
+#define M_ENOTEMPTY		93
+#define M_EUSERS		94
+#define M_ENOTSOCK		95
+#define M_EDESTADDRREQ		96
+#define M_EMSGSIZE		97
+#define M_EPROTOTYPE		98
+#define M_ENOPROTOOPT		99
+#define M_EPROTONOSUPPORT	120
+#define M_ESOCKTNOSUPPORT	121
+#define M_EOPNOTSUPP		122
+#define M_EPFNOSUPPORT		123
+#define M_EAFNOSUPPORT		124
+#define M_EADDRINUSE		125
+#define M_EADDRNOTAVAIL		126
+#define M_ENETDOWN		127
+#define M_ENETUNREACH		128
+#define M_ENETRESET		129
+#define M_ECONNABORTED		130
+#define M_ECONNRESET		131
+#define M_ENOBUFS		132
+#define M_EISCONN		133
+#define M_ENOTCONN		134
+#define M_EUCLEAN		135
+#define M_ENOTNAM		137
+#define M_ENAVAIL		138
+#define M_EISNAM		139
+#define M_EREMOTEIO		140
+#define M_ESHUTDOWN		143
+#define M_ETOOMANYREFS		144
+#define M_ETIMEDOUT		145
+#define M_ECONNREFUSED		146
+#define M_EHOSTDOWN		147
+#define M_EHOSTUNREACH		148
+#define M_EALREADY		149
+#define M_EINPROGRESS		150
+#define M_ESTALE		151
+#define M_ECANCELED		158
+#define M_ENOMEDIUM		159
+#define M_EMEDIUMTYPE		160
+#define M_ENOKEY		161
+#define M_EKEYEXPIRED		162
+#define M_EKEYREVOKED		163
+#define M_EKEYREJECTED		164
+#define M_EOWNERDEAD		165
+#define M_ENOTRECOVERABLE	166
+#define M_ERFKILL		167
+#define M_EHWPOISON		168
+#define M_EDQUOT		1133
+#endif /* _TRANS_MIPS_SYSCALLS_H  */

arch/loongarch/include/asm/trans_syscalls.h

@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Loongson Technology Corporation Limited
+ * Authors: Hanlu Li <lihanlu@loongson.cn>
+ *
+ * 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.
+ */
+#ifndef _TRANS_SYSCALLS_H_
+#define _TRANS_SYSCALLS_H_
+#include <asm/trans_mips_syscalls.h>
+#endif

arch/loongarch/include/asm/unistd.h

@@ -12,3 +12,19 @@
 #define __ARCH_WANT_SYS_CLONE
 
 #define NR_syscalls (__NR_syscalls)
+
+/* for binary translation */
+#if defined(CONFIG_CPU_HAS_LBT)
+#define __ARCH_WANT_SYS_ALARM
+#define __ARCH_WANT_SYS_GETPGRP
+
+#define __NR_MIPS64_Linux		5000
+#define __NR_MIPS64_Linux_syscalls	329
+#define __NR_i386_Linux_syscalls	386
+
+#define TRANS_MIPS_N64			0x010000
+#define TRANS_I386			0x100000
+#define TRANS_X64			0x110000
+#define TRANS_ARCH_MASK			0xffff0000
+#define SYS_NUM_MASK			0xffff
+#endif

arch/loongarch/kernel/Makefile

@@ -17,7 +17,7 @@ obj-$(CONFIG_EFI) 		+= efi.o
 
 obj-$(CONFIG_CPU_HAS_FPU)	+= fpu.o kfpu.o
 
-obj-$(CONFIG_CPU_HAS_LBT)	+= lbt.o
+obj-$(CONFIG_CPU_HAS_LBT)	+= lbt.o scall-trans-mips64.o trans_mips_syscalls.o scall-trans-i386.o trans_i386_syscalls.o
 
 obj-$(CONFIG_ARCH_STRICT_ALIGN)	+= unaligned.o