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Diffstat (limited to 'nuttx/arch/mips/src/mips32/up_vfork.h')
-rw-r--r-- | nuttx/arch/mips/src/mips32/up_vfork.h | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/nuttx/arch/mips/src/mips32/up_vfork.h b/nuttx/arch/mips/src/mips32/up_vfork.h new file mode 100644 index 000000000..556633072 --- /dev/null +++ b/nuttx/arch/mips/src/mips32/up_vfork.h @@ -0,0 +1,132 @@ +/**************************************************************************** + * arch/mips/src/mips/up_vfork.h + * + * Copyright (C) 2013 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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. + * + ****************************************************************************/ + +#ifndef __ARCH_MIPS_SRC_MIPS32_VFORK_H +#define __ARCH_MIPS_SRC_MIPS32_VFORK_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#include <arch/mips32/irq.h> + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ +/* Register r30 may be a frame pointer in some ABIs. Or may just be saved + * register s8. It makes a difference for vfork handling. + */ + +#undef VFORK_HAVE_FP + +/* r0 zero Always has the value 0. + * r1 at Temporary generally used by assembler. + * r2-r3 v0-v1 Used for expression evaluations and to hold the integer and + * pointer type function return values. + * r4-r7 a0-a3 Used for passing arguments to functions; values are not + * preserved across function calls. + * r8-r15 t0-t7 Temporary registers used for expression evaluation; values + * are not preserved across function calls. + * r16-r23 s0-s7 Saved registers; values are preserved across function calls. + * r24-r25 t8-t9 Temporary registers used for expression evaluations; values + * are not preserved across function calls. When calling + * position independent functions r25 must contain the address + * of the called function. + * r26-r27 k0-k1 Used only by the operating system. + * r28 gp Global pointer and context pointer. + * r29 sp Stack pointer. + * r30 s8 Saved register (like s0-s7). If a frame pointer is used, + * then this is the frame pointer. + * r31 ra Return address. + */ + +#define VFORK_S0_OFFSET (0*4) /* Saved register s0 */ +#define VFORK_S1_OFFSET (1*4) /* Saved register s1 */ +#define VFORK_S2_OFFSET (2*4) /* Saved register s2 */ +#define VFORK_S3_OFFSET (3*4) /* Saved register s3 */ +#define VFORK_S4_OFFSET (4*4) /* Saved register s4 */ +#define VFORK_S5_OFFSET (5*4) /* Saved register s5 */ +#define VFORK_S6_OFFSET (6*4) /* Saved register s6 */ +#define VFORK_S7_OFFSET (7*4) /* Saved register s7 */ + +#ifdef CONFIG_MIPS32_FRAMEPOINTER +# define VFORK_FP_OFFSET (8*4) /* Frame pointer */ +#else +# define VFORK_S8_OFFSET (8*4) /* Saved register s8 */ +#endif + +#define VFORK_SP_OFFSET (9*4) /* Stack pointer*/ +#define VFORK_RA_OFFSET (10*4) /* Return address*/ +#ifdef MIPS32_SAVE_GP +# define VFORK_GP_OFFSET (11*4) /* Global pointer */ +# define VFORK_SIZEOF (12*4) +#else +# define VFORK_SIZEOF (11*4) +#endif + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +#ifndef __ASSEMBLY__ +struct vfork_s +{ + /* CPU registers */ + + uint32_t s0; /* Saved register s0 */ + uint32_t s1; /* Saved register s1 */ + uint32_t s2; /* Saved register s2 */ + uint32_t s3; /* Saved register s3 */ + uint32_t s4; /* Saved register s4 */ + uint32_t s5; /* Saved register s5 */ + uint32_t s6; /* Saved register s6 */ + uint32_t s7; /* Saved register s7 */ +#ifdef CONFIG_MIPS32_FRAMEPOINTER + uint32_t fp; /* Frame pointer */ +#else + uint32_t s8; /* Saved register s8 */ +#endif + uint32_t sp; /* Stack pointer*/ + uint32_t ra; /* Return address*/ +#ifdef MIPS32_SAVE_GP + uint32_t gp; /* Global pointer */ +#endif + + /* Floating point registers (not yet) */ +}; +#endif + +#endif /* __ARCH_MIPS_SRC_MIPS32_VFORK_H */ |