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Diffstat (limited to 'nuttx/arch/x86/include/i486/arch.h')
| -rwxr-xr-x | nuttx/arch/x86/include/i486/arch.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/nuttx/arch/x86/include/i486/arch.h b/nuttx/arch/x86/include/i486/arch.h new file mode 100755 index 000000000..89901cb0a --- /dev/null +++ b/nuttx/arch/x86/include/i486/arch.h @@ -0,0 +1,108 @@ +/**************************************************************************** + * arch/x86/include/i486/arch.h + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. 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. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "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 + * COPYRIGHT OWNER OR CONTRIBUTORS 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. + * + ****************************************************************************/ + +/* This file should never be included directed but, rather, + * only indirectly through nuttx/arch.h + */ + +#ifndef __ARCH_X86_INCLUDE_I486_ARCH_H +#define __ARCH_X86_INCLUDE_I486_ARCH_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/* FLAGS bits */ + +#define X86_FLAGS_CF (1 << 0) /* Bit 0: Carry Flag */ + /* Bit 1: Reserved */ +#define X86_FLAGS_PF (1 << 2) /* Bit 2: Parity Flag */ + /* Bit 3: Reserved */ +#define X86_FLAGS_AF (1 << 4) /* Bit 4: Auxillary carry Flag */ + /* Bit 5: Reserved */ +#define X86_FLAGS_ZF (1 << 6) /* Bit 6: Zero Flag */ +#define X86_FLAGS_SF (1 << 7) /* Bit 7: Sign Flag */ +#define X86_FLAGS_TF (1 << 8) /* Bit 8: Trap Flag */ +#define X86_FLAGS_IF (1 << 9) /* Bit 9: Interrupt Flag */ +#define X86_FLAGS_DF (1 << 10) /* Bit 10: Direction Flag */ +#define X86_FLAGS_OF (1 << 11) /* Bit 11: Overflow Flag */ +#define X86_FLAGS_IOPL_SHIFT (12) /* Bits 12-13: IOPL mask (286+ only)*/ +#define X86_FLAGS_IOPL_MASK (3 << X86_FLAGS_IOPL_SHIFT) +#define X86_FLAGS_NT (1 << 14) /* Bit 14: Nested Task */ + /* Bit 15: Reserved */ + +/* EFLAGS bits (Extend the basic FLAGS bit definitions) */ + +#define X86_EFLAGS_RF (1 << 16) /* Bit 16: Resume Flag (386+ only) */ +#define X86_EFLAGS_VM (1 << 17) /* Bit 17: Virtual Mode (386+ only) */ +#define X86_EFLAGS_AC (1 << 18) /* Bit 18: Alignment Check (486SX+ only) */ +#define X86_EFLAGS_VIF (1 << 19) /* Bit 19: Virtual Interrupt Flag (Pentium+) */ +#define X86_EFLAGS_VIP (1 << 20) /* Bit 20: Virtual Interrupt Pending (Pentium+) */ +#define X86_EFLAGS_ID (1 << 21) /* Bit 21: CPUID detection flag (Pentium+) */ + +/**************************************************************************** + * Inline functions + ****************************************************************************/ + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +#undef EXTERN +#ifdef __cplusplus +} +#endif + +#endif /* __ARCH_X86_INCLUDE_I486_ARCH_H */ + |