MIPS support for libc.
Change-Id: I2864dea04b3faf2d919165dcaa600af5b16c41c8
Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Raghu Gandham <raghu@mips.com>
diff --git a/libc/arch-mips/include/machine/asm.h b/libc/arch-mips/include/machine/asm.h
new file mode 100644
index 0000000..43dbc09
--- /dev/null
+++ b/libc/arch-mips/include/machine/asm.h
@@ -0,0 +1,305 @@
+/* $OpenBSD: asm.h,v 1.7 2004/10/20 12:49:15 pefo Exp $ */
+
+/*
+ * Copyright (c) 2001-2002 Opsycon AB (www.opsycon.se / www.opsycon.com)
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 _MIPS64_ASM_H
+#define _MIPS64_ASM_H
+
+#include <machine/regdef.h>
+
+#ifdef NEED_OLD_RM7KFIX
+#define ITLBNOPFIX nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;
+#else
+#define ITLBNOPFIX nop;nop;nop;nop
+#endif
+
+#define _MIPS_ISA_MIPS1 1 /* R2000/R3000 */
+#define _MIPS_ISA_MIPS2 2 /* R4000/R6000 */
+#define _MIPS_ISA_MIPS3 3 /* R4000 */
+#define _MIPS_ISA_MIPS4 4 /* TFP (R1x000) */
+#ifdef __linux__
+#define _MIPS_ISA_MIPS5 5
+#define _MIPS_ISA_MIPS32 6
+#define _MIPS_ISA_MIPS64 7
+#else
+#define _MIPS_ISA_MIPS32 32 /* MIPS32 */
+#endif
+
+#if !defined(ABICALLS) && !defined(_NO_ABICALLS)
+#define ABICALLS .abicalls
+#endif
+
+#if defined(ABICALLS) && !defined(_KERNEL)
+ ABICALLS
+#endif
+
+#define _C_LABEL(x) x /* XXX Obsolete but keep for a while */
+
+#if !defined(__MIPSEL__) && !defined(__MIPSEB__)
+#error "__MIPSEL__ or __MIPSEB__ must be defined"
+#endif
+/*
+ * Define how to access unaligned data word
+ */
+#if defined(__MIPSEL__)
+#define LWLO lwl
+#define LWHI lwr
+#define SWLO swl
+#define SWHI swr
+#define LDLO ldl
+#define LDHI ldr
+#define SDLO sdl
+#define SDHI sdr
+#endif
+#if defined(__MIPSEB__)
+#define LWLO lwr
+#define LWHI lwl
+#define SWLO swr
+#define SWHI swl
+#define LDLO ldr
+#define LDHI ldl
+#define SDLO sdr
+#define SDHI sdl
+#endif
+
+/*
+ * Define programming environment for ABI.
+ */
+#if defined(ABICALLS) && !defined(_KERNEL) && !defined(_STANDALONE)
+
+#ifndef _MIPS_SIM
+#define _MIPS_SIM 1
+#define _ABIO32 1
+#endif
+#ifndef _MIPS_ISA
+#define _MIPS_ISA 2
+#define _MIPS_ISA_MIPS2 2
+#endif
+
+#if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32)
+#define NARGSAVE 4
+
+#define SETUP_GP \
+ .set noreorder; \
+ .cpload t9; \
+ .set reorder;
+
+#define SAVE_GP(x) \
+ .cprestore x
+
+#define SETUP_GP64(gpoff, name)
+#define RESTORE_GP64
+#endif
+
+#if (_MIPS_SIM == _ABI64) || (_MIPS_SIM == _ABIN32)
+#define NARGSAVE 0
+
+#define SETUP_GP
+#define SAVE_GP(x)
+#define SETUP_GP64(gpoff, name) \
+ .cpsetup t9, gpoff, name
+#define RESTORE_GP64 \
+ .cpreturn
+#endif
+
+#define MKFSIZ(narg,locals) (((narg+locals)*REGSZ+31)&(~31))
+
+#else /* defined(ABICALLS) && !defined(_KERNEL) */
+
+#define NARGSAVE 4
+#define SETUP_GP
+#define SAVE_GP(x)
+
+#define ALIGNSZ 16 /* Stack layout alignment */
+#define FRAMESZ(sz) (((sz) + (ALIGNSZ-1)) & ~(ALIGNSZ-1))
+
+#endif
+
+/*
+ * Basic register operations based on selected ISA
+ */
+#if (_MIPS_ISA == _MIPS_ISA_MIPS1 || _MIPS_ISA == _MIPS_ISA_MIPS2 || _MIPS_ISA == _MIPS_ISA_MIPS32)
+#define REGSZ 4 /* 32 bit mode register size */
+#define LOGREGSZ 2 /* log rsize */
+#define REG_S sw
+#define REG_L lw
+#define CF_SZ 24 /* Call frame size */
+#define CF_ARGSZ 16 /* Call frame arg size */
+#define CF_RA_OFFS 20 /* Call ra save offset */
+#endif
+
+#if (_MIPS_ISA == _MIPS_ISA_MIPS3 || _MIPS_ISA == _MIPS_ISA_MIPS4)
+#define REGSZ 8 /* 64 bit mode register size */
+#define LOGREGSZ 3 /* log rsize */
+#define REG_S sd
+#define REG_L ld
+#define CF_SZ 48 /* Call frame size (multiple of ALIGNSZ) */
+#define CF_ARGSZ 32 /* Call frame arg size */
+#define CF_RA_OFFS 40 /* Call ra save offset */
+#endif
+
+#define REGSZ_FP 8 /* 64 bit FP register size */
+
+#ifndef __LP64__
+#define PTR_L lw
+#define PTR_S sw
+#define PTR_SUB sub
+#define PTR_ADD add
+#define PTR_SUBU subu
+#define PTR_ADDU addu
+#define LI li
+#define LA la
+#define PTR_SLL sll
+#define PTR_SRL srl
+#define PTR_VAL .word
+#else
+#define PTR_L ld
+#define PTR_S sd
+#define PTR_ADD dadd
+#define PTR_SUB dsub
+#define PTR_SUBU dsubu
+#define PTR_ADDU daddu
+#define LI dli
+#define LA dla
+#define PTR_SLL dsll
+#define PTR_SRL dsrl
+#define PTR_VAL .dword
+#endif
+
+/*
+ * Define -pg profile entry code.
+ */
+#if defined(XGPROF) || defined(XPROF)
+#define MCOUNT \
+ PTR_SUBU sp, sp, 32; \
+ SAVE_GP(16); \
+ sw ra, 28(sp); \
+ sw gp, 24(sp); \
+ .set noat; \
+ .set noreorder; \
+ move AT, ra; \
+ jal _mcount; \
+ PTR_SUBU sp, sp, 8; \
+ lw ra, 28(sp); \
+ PTR_ADDU sp, sp, 32; \
+ .set reorder; \
+ .set at;
+#else
+#define MCOUNT
+#endif
+
+/*
+ * LEAF(x, fsize)
+ *
+ * Declare a leaf routine.
+ */
+#define LEAF(x, fsize) \
+ .align 3; \
+ .globl x; \
+ .ent x, 0; \
+x: ; \
+ .frame sp, fsize, ra; \
+ SETUP_GP \
+ MCOUNT
+
+#define ALEAF(x) \
+ .globl x; \
+x:
+
+/*
+ * NLEAF(x)
+ *
+ * Declare a non-profiled leaf routine.
+ */
+#define NLEAF(x, fsize) \
+ .align 3; \
+ .globl x; \
+ .ent x, 0; \
+x: ; \
+ .frame sp, fsize, ra; \
+ SETUP_GP
+
+/*
+ * NON_LEAF(x)
+ *
+ * Declare a non-leaf routine (a routine that makes other C calls).
+ */
+#define NON_LEAF(x, fsize, retpc) \
+ .align 3; \
+ .globl x; \
+ .ent x, 0; \
+x: ; \
+ .frame sp, fsize, retpc; \
+ SETUP_GP \
+ MCOUNT
+
+/*
+ * NNON_LEAF(x)
+ *
+ * Declare a non-profiled non-leaf routine
+ * (a routine that makes other C calls).
+ */
+#define NNON_LEAF(x, fsize, retpc) \
+ .align 3; \
+ .globl x; \
+ .ent x, 0; \
+x: ; \
+ .frame sp, fsize, retpc \
+ SETUP_GP
+
+/*
+ * END(x)
+ *
+ * Mark end of a procedure.
+ */
+#define END(x) \
+ .end x
+
+/*
+ * Macros to panic and printf from assembly language.
+ */
+#define PANIC(msg) \
+ LA a0, 9f; \
+ jal panic; \
+ nop ; \
+ MSG(msg)
+
+#define PRINTF(msg) \
+ la a0, 9f; \
+ jal printf; \
+ nop ; \
+ MSG(msg)
+
+#define MSG(msg) \
+ .rdata; \
+9: .asciiz msg; \
+ .text
+
+#define ASMSTR(str) \
+ .asciiz str; \
+ .align 3
+
+#endif /* !_MIPS_ASM_H */