powerpc_sys5.h

system C源码 一种替代verilog的语言

/* Define parameter offset on the stack.
 * NOTICE: Parameters are numbered 0, 1, ..., n. 
*/
#define PPC_PAR(i) (PPC_LINKAGE_AREA+(i)*4)

/*****************************************************************************
 
   Define stack frames
 
 *****************************************************************************/ 


/* Define the "qt_blocki" and "qt_abort" stack frame. We use the same stack
 * frame for both. 
 *

 top + S ->  
                        +==========================+
 top + S - 4 ->         |                          | GPR31 
                        +      GPR SAVE AREA       +
                               ..............
                        +                          +
 top + S - 19 * 4 ->    |                          | GPR13
                        +--------------------------+
                        |                          | 
                        +      ALIGNMEBNT PAD      +
                               ..............
                        +       (if needed)        +
                        |                          |
                        +--------------------------+
 top + 8 ->             |         CR SAVE          |
                        +--------------------------+
                        |                          |
                        +       LINKAGE AREA       +
 top ->                 |                          |
                        +==========================+
 */

#define QUICKTHREADS_BLOCKI_FRAME_SIZE \
	PPC_ROUND_STACK(PPC_LINKAGE_AREA+4+PPC_GPR_SAVE_AREA)
	
#define QUICKTHREADS_BLOCKI_CR_SAVE 8

/* Offset to the base of the GPR save area. Save from GPR13 to GPR31
 * increasing address. 
 */
#define QUICKTHREADS_BLOCKI_GPR_SAVE(i) (QUICKTHREADS_BLOCKI_FRAME_SIZE-4+(i-31)*4)



/* Define the "qt_block" stack frame. Notice that since "qt_black" calls
 * "qt_blocki", GPR registers are saved into "qt_blocki" stack frame.
 *

 top + S ->  
                        +==========================+
 top + S - 8 ->         |                          | FPR31 
                        +      FPR SAVE AREA       +
                               ..............
                        +                          +
 top + S - 18 * 8 ->    |                          | FPR14
                        +--------------------------+
                        |                          | 
                        +      ALIGNMEBNT PAD      +
                               ..............
                        +       (if needed)        +
                        |                          |
                        +--------------------------+
                        |                          |
                        +       LINKAGE AREA       +
 top ->                 |                          |
                        +==========================+
 */

#define QUICKTHREADS_BLOCK_FRAME_SIZE \
	PPC_ROUND_STACK(PPC_LINKAGE_AREA+PPC_FPR_SAVE_AREA)

/* Offset to the location where registers are saved.
 */
#define QUICKTHREADS_BLOCK_FPR_SAVE(i) (QUICKTHREADS_BLOCK_FRAME_SIZE-8+(i-31)*8)


/* Define the "qt_start" frame size. It consists just of the linkage area and 
 * the parameter area. 
 *

                        +==========================+
                        |                          | 
                        +      ALIGNMEBNT PAD      +
                               ..............
                        +       (if needed)        +
                        |                          |
                        +--------------------------+
                        |                          | only par
                        +                          +
                        |                          | userf par
                        +      PARAMETER AREA      +
                        |                          | t par
                        +                          +
 top + 8 ->             |                          | u par
                        +--------------------------+
                        |                          |
                        +       LINKAGE AREA       +
 top ->                 |                          |
                        +==========================+

 */
#define QUICKTHREADS_START_FRAME_SIZE PPC_ROUND_STACK(PPC_LINKAGE_AREA+PPC_PARAM_AREA(4))



/* Define the "qt_vstart" frame. It consists of the linkage area, the fix parameter 
 * area, the variant argument list and a local variable area used in "qt_vstart"
 * implementation.
 *

 backchain ->  
                        +==========================+
 backchain - 4 ->       |                          | 
                        +   LOCAL VARIABLES AREA   +
                               ..............
                        +                          +
                        |                          |
                        +--------------------------+
                        |                          | 
                        +      ALIGNMEBNT PAD      +
                               ..............
                        +       (if needed)        +
                        |                          |
                        +--------------------------+
                        |                          | arg(n)
                        +                          +
                        |                          | 
                        +  VARIABLE ARGUMENT LIST  +
                               ..............
                        +      for userf call      +
                        |                          | arg(1)
                        +                          +
 top + 8 + 16 ->        |                          | arg(0)
                        +--------------------------+
                        |                          | cleanup par
                        +                          +
                        |                          | userf par
                        +      PARAMETER AREA      +
                        |                          | startup par
                        +                          +
 top + 8 ->             |                          | t par
                        +--------------------------+
                        |                          |
                        +       LINKAGE AREA       +
 top ->                 |                          |
                        +==========================+

 */
#define QUICKTHREADS_VARGS_LOCAL_AREA (4*4)		/* local variable area */

/* The offset the stack will be moved back before to call "userf(...)".
 * The linckage area must be moved to be adiacent to the part of the variant
 * argument list that is in the stack. Notice that, since the first 8
 * parameters are passed via registers, the offset is equal to the size of
 * 4+8 parameters. */
#define QUICKTHREADS_VARGS_BKOFF PPC_PARAM_AREA(4+8)

#define QUICKTHREADS_VSTART_FRAME_SIZE(varbytes) \
	PPC_ROUND_STACK(PPC_LINKAGE_AREA+QUICKTHREADS_VARGS_BKOFF+(varbytes)+ \
		QUICKTHREADS_VARGS_LOCAL_AREA)

/* Offset to the base of the varian argument list */
#define QUICKTHREADS_VSTART_LIST_BASE (PPC_LINKAGE_AREA+PPC_PARAM_AREA(4))


/* Notice that qt_start and qt_vstart have no parameters, actually their
 * parameters are written in their stack frame during thread initialization
 */
extern void qt_start(void);
extern void qt_vstart(void);



/* Offset (in words) of the location where the block routine saves its return
 * address (i.e. LR). SP points the top of the block routine stack and,
 * following ppc calling conventions, the return address is saved in the
 * previous (caller's) stack frame.
 */
#define QUICKTHREADS_RETURN_INDEX ((QUICKTHREADS_BLOCKI_FRAME_SIZE+PPC_LR_SAVE)/sizeof(PPC_W))

/* static variable used to get the stack bottom in "VARGS" initialization */
static void *qt_sp_bottom_save;

#define QUICKTHREADS_ARG_INDEX(i) ((QUICKTHREADS_BLOCKI_FRAME_SIZE+PPC_PAR(i))/sizeof(PPC_W))

/*****************************************************************************

	QuickThreads needed definitions

 *****************************************************************************/


#define QUICKTHREADS_GROW_DOWN
#define QUICKTHREADS_STKALIGN	PPC_STACK_INCR
typedef PPC_W qt_word_t;


/* This macro is used by "QUICKTHREADS_ARGS" to initialize a single argument thread.
 * - set "qt_start" as the "qt_block" or "qt_blocki" return address;
 * - set the top of the stack backchain;
 * - set the next backchain (not needed, but just to be "clean").   
 */
#define QUICKTHREADS_ARGS_MD(sp) \
	(QUICKTHREADS_SPUT (sp, QUICKTHREADS_RETURN_INDEX, qt_start), \
	QUICKTHREADS_SPUT (sp, 0, sp+QUICKTHREADS_BLOCKI_FRAME_SIZE), \
	QUICKTHREADS_SPUT (sp, QUICKTHREADS_BLOCKI_FRAME_SIZE/sizeof(PPC_W), \
		sp+QUICKTHREADS_BLOCKI_FRAME_SIZE+QUICKTHREADS_START_FRAME_SIZE))


/* This macro is used by "QUICKTHREADS_VARGS" to initialize a variant argument thread. 
 * It returns the pointer to the top of the argument list.
 * We also use it to get the stack bottom via a static variable. This is a bit 
 * "dirty", it could be better to do it in "qt_vargs", but we don't want change 
 * anything out of this file.
 * We need the stack bottom to allocate a local variable area used by
 * "qt_vstart". 
 */
#define QUICKTHREADS_VARGS_MD0(sp, varbytes) \
  ((qt_sp_bottom_save = sp), \
  ((qt_t *)(((char *)(sp)) - \
		(QUICKTHREADS_VSTART_FRAME_SIZE(varbytes)-QUICKTHREADS_VSTART_LIST_BASE))))


/* This macro is used by "QUICKTHREADS_VARGS" to initialize a variant argument thread.
 * - set "qt_start" as the "qt_block" or "qt_blocki" return address;
 * - set the top of the stackback chain;
 * - set the next backchain (it points the stack botton).   
 */
#define QUICKTHREADS_VARGS_MD1(sp) \
	(QUICKTHREADS_SPUT (sp, QUICKTHREADS_RETURN_INDEX, qt_vstart), \
	QUICKTHREADS_SPUT (sp, 0, sp+QUICKTHREADS_BLOCKI_FRAME_SIZE), \
	QUICKTHREADS_SPUT (sp, (QUICKTHREADS_BLOCKI_FRAME_SIZE)/sizeof(PPC_W), \
		qt_sp_bottom_save))


/* Activate "qt_vargs" as the initialization routine for the variant 
 * argument threads
 */ 
#define QUICKTHREADS_VARGS_DEFAULT 

/* Override "qt_vargs" with "qt_vargs_stdarg".
 * On LinuxPPC "qt_vargs" doesn't work, "qt_vargs_stdarg" uses a more
 * standard way to retrieve arguments from the variant list.
 */
#define QUICKTHREADS_VARGS(sp, nbytes, vargs, pt, startup, vuserf, cleanup) \
      ((qt_t *)qt_vargs_stdarg (sp, nbytes, vargs, pt, startup, vuserf, cleanup))


/* This macro is used by "QUICKTHREADS_ADJ(sp)" to get the stack top form the stack
 * bottom during a single argument thread initialization.
 * It is the space we need to allocate for a single argument thread: the stack 
 * frame for the block routine ("qt_block" or "qt_blocki") and for "qt_start".
 */
#define QUICKTHREADS_STKBASE \
	(QUICKTHREADS_BLOCKI_FRAME_SIZE+QUICKTHREADS_START_FRAME_SIZE)

/* This macro is used by "QUICKTHREADS_VADJ(sp)" to get the stack top from the base
 * of the variant argument list during a variant argument thread initialization.
 */
#define QUICKTHREADS_VSTKBASE	(QUICKTHREADS_BLOCKI_FRAME_SIZE+QUICKTHREADS_VSTART_LIST_BASE)

/* The *index* (positive offset) of where to put each value. */

#define QUICKTHREADS_ARGU_INDEX	QUICKTHREADS_ARG_INDEX(0)
#define QUICKTHREADS_ARGT_INDEX	QUICKTHREADS_ARG_INDEX(1)
#define QUICKTHREADS_USER_INDEX	QUICKTHREADS_ARG_INDEX(2)
#define QUICKTHREADS_ONLY_INDEX	QUICKTHREADS_ARG_INDEX(3)


#define QUICKTHREADS_VARGT_INDEX		QUICKTHREADS_ARG_INDEX(0)
#define QUICKTHREADS_VSTARTUP_INDEX	QUICKTHREADS_ARG_INDEX(1)
#define QUICKTHREADS_VUSERF_INDEX		QUICKTHREADS_ARG_INDEX(2)
#define QUICKTHREADS_VCLEANUP_INDEX	QUICKTHREADS_ARG_INDEX(3)

#endif /* ndef QUICKTHREADS_POWERPC_H */