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/*  asm.h

 *

 *  This include file attempts to address the problems

 *  caused by incompatible flavors of assemblers and

 *  toolsets.  It primarily addresses variations in the

 *  use of leading underscores on symbols and the requirement

 *  that register names be preceded by a %.

 *

 *

 *  NOTE: The spacing in the use of these macros

 *        is critical to them working as advertised.

 *

 *  COPYRIGHT:

 *

 *  This file is based on similar code found in newlib available

 *  from ftp.cygnus.com.  The file which was used had no copyright

 *  notice.  This file is freely distributable as long as the source

 *  of the file is noted.  This file is:

 *

 *  COPYRIGHT (c) 1995.

 *  i-cubed ltd.

 *

 *  COPYRIGHT (c) 1994.

 *  On-Line Applications Research Corporation (OAR).

 *

 *  $Id: asm.h,v 1.2 2001-09-27 11:59:30 chris Exp $

 */

#ifndef __PPC_ASM_h

#define __PPC_ASM_h

/*

 *  Indicate we are in an assembly file and get the basic CPU definitions.

 */

#ifndef ASM

#define ASM

#endif

#include <rtems/score/targopts.h>

#include <rtems/score/ppc.h>

/*

 *  Recent versions of GNU cpp define variables which indicate the

 *  need for underscores and percents.  If not using GNU cpp or

 *  the version does not support this, then you will obviously

 *  have to define these as appropriate.

 */

#ifndef __USER_LABEL_PREFIX__

#define __USER_LABEL_PREFIX__ 

#endif

#ifndef __REGISTER_PREFIX__

#define __REGISTER_PREFIX__

#endif

#ifndef __FLOAT_REGISTER_PREFIX__

#define __FLOAT_REGISTER_PREFIX__  __REGISTER_PREFIX__

#endif

#if (PPC_ABI == PPC_ABI_POWEROPEN)

#ifndef __PROC_LABEL_PREFIX__

#define __PROC_LABEL_PREFIX__ .

#endif

#endif

#ifndef __PROC_LABEL_PREFIX__

#define __PROC_LABEL_PREFIX__  __USER_LABEL_PREFIX__

#endif

/* ANSI concatenation macros.  */

#define CONCAT1(a, b) CONCAT2(a, b)

#define CONCAT2(a, b) a ## b

/* Use the right prefix for global labels.  */

#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)

/* Use the right prefix for procedure labels.  */

#define PROC(x) CONCAT1 (__PROC_LABEL_PREFIX__, x)

/* Use the right prefix for registers.  */

#define REG(x) CONCAT1 (__REGISTER_PREFIX__, x)

/* Use the right prefix for floating point registers.  */

#define FREG(x) CONCAT1 (__FLOAT_REGISTER_PREFIX__, x)

/*

 *  define macros for all of the registers on this CPU

 *

 *  EXAMPLE:     #define d0 REG (d0)

 */

#define r0 REG(0)

#define r1 REG(1)

#define r2 REG(2)

#define r3 REG(3)

#define r4 REG(4)

#define r5 REG(5)

#define r6 REG(6)

#define r7 REG(7)

#define r8 REG(8)

#define r9 REG(9)

#define r10 REG(10)

#define r11 REG(11)

#define r12 REG(12)

#define r13 REG(13)

#define r14 REG(14)

#define r15 REG(15)

#define r16 REG(16)

#define r17 REG(17)

#define r18 REG(18)

#define r19 REG(19)

#define r20 REG(20)

#define r21 REG(21)

#define r22 REG(22)

#define r23 REG(23)

#define r24 REG(24)

#define r25 REG(25)

#define r26 REG(26)

#define r27 REG(27)

#define r28 REG(28)

#define r29 REG(29)

#define r30 REG(30)

#define r31 REG(31)

#define f0 FREG(0)

#define f1 FREG(1)

#define f2 FREG(2)

#define f3 FREG(3)

#define f4 FREG(4)

#define f5 FREG(5)

#define f6 FREG(6)

#define f7 FREG(7)

#define f8 FREG(8)

#define f9 FREG(9)

#define f10 FREG(10)

#define f11 FREG(11)

#define f12 FREG(12)

#define f13 FREG(13)

#define f14 FREG(14)

#define f15 FREG(15)

#define f16 FREG(16)

#define f17 FREG(17)

#define f18 FREG(18)

#define f19 FREG(19)

#define f20 FREG(20)

#define f21 FREG(21)

#define f22 FREG(22)

#define f23 FREG(23)

#define f24 FREG(24)

#define f25 FREG(25)

#define f26 FREG(26)

#define f27 FREG(27)

#define f28 FREG(28)

#define f29 FREG(29)

#define f30 FREG(30)

#define f31 FREG(31)

/*

 * Some special purpose registers (SPRs).

 */

#define srr0    0x01a

#define srr1    0x01b

#define srr2    0x3de   /* IBM 400 series only */

#define srr3    0x3df   /* IBM 400 series only */

#define sprg0   0x110

#define sprg1   0x111

#define sprg2   0x112

#define sprg3   0x113

/* the following SPR/DCR registers exist only in IBM 400 series */

#define dear    0x3d5   

#define evpr    0x3d6   /* SPR: exception vector prefix register   */

#define iccr    0x3fb   /* SPR: instruction cache control reg.     */

#define dccr    0x3fa   /* SPR: data cache control reg.            */

#define exisr   0x040   /* DCR: external interrupt status register */

#define exier   0x042   /* DCR: external interrupt enable register */

#define br0     0x080   /* DCR: memory bank register 0             */

#define br1     0x081   /* DCR: memory bank register 1             */

#define br2     0x082   /* DCR: memory bank register 2             */

#define br3     0x083   /* DCR: memory bank register 3             */

#define br4     0x084   /* DCR: memory bank register 4             */

#define br5     0x085   /* DCR: memory bank register 5             */

#define br6     0x086   /* DCR: memory bank register 6             */

#define br7     0x087   /* DCR: memory bank register 7             */

/* end of IBM400 series register definitions */

/* The following registers are for the MPC8x0 */

#define der     0x095   /* Debug Enable Register */

/* end of MPC8x0 registers */

/*

 *  Following must be tailor for a particular flavor of the C compiler.

 *  They may need to put underscores in front of the symbols.

 */

#define PUBLIC_VAR(sym) .globl SYM (sym)

#define EXTERN_VAR(sym) .extern SYM (sym)

#define PUBLIC_PROC(sym) .globl PROC (sym)

#define EXTERN_PROC(sym) .extern PROC (sym)

/* Other potentially assembler specific operations */

#if PPC_ASM == PPC_ASM_ELF

#define ALIGN(n,p)      .align  p

#define DESCRIPTOR(x)   \

        .section .descriptors,"aw";     \

        PUBLIC_VAR (x);                 \

SYM (x):;                               \

        .long   PROC (x);               \

        .long   s.got;                  \

        .long   0

#define EXT_SYM_REF(x)  .long x

#define EXT_PROC_REF(x) .long x

/*

 *  Define macros to handle section beginning and ends.

 */

#define BEGIN_CODE_DCL .text

#define END_CODE_DCL

#define BEGIN_DATA_DCL .data

#define END_DATA_DCL

#define BEGIN_CODE .text

#define END_CODE

#define BEGIN_DATA .data

#define END_DATA

#define BEGIN_BSS  .bss

#define END_BSS

#define END

#elif PPC_ASM == PPC_ASM_XCOFF

#define ALIGN(n,p)      .align  p

#define DESCRIPTOR(x)   \

        .csect  x[DS];          \

        .globl  x[DS];          \

        .long   PROC (x)[PR];   \

        .long   TOC[tc0]

#define EXT_SYM_REF(x)  .long x[RW]

#define EXT_PROC_REF(x) .long x[DS]

/*

 *  Define macros to handle section beginning and ends.

 */

#define BEGIN_CODE_DCL .csect .text[PR]

#define END_CODE_DCL

#define BEGIN_DATA_DCL .csect .data[RW]

#define END_DATA_DCL

#define BEGIN_CODE .csect .text[PR]

#define END_CODE

#define BEGIN_DATA .csect .data[RW]

#define END_DATA

#define BEGIN_BSS  .bss

#define END_BSS

#define END

#else

#error "PPC_ASM_TYPE is not properly defined"

#endif

#ifndef PPC_ASM

#error "PPC_ASM_TYPE is not properly defined"

#endif

#endif

/* end of include file */