C++ P1275_ARG函数代码示例

void prom_set_trap_table_sun4v(unsigned long tba, unsigned long mmfsa)
{
	p1275_cmd("SUNW,set-trap-table",
		  (P1275_ARG(0, P1275_ARG_IN_64B) |
		   P1275_ARG(1, P1275_ARG_IN_64B) |
		   P1275_INOUT(2, 0)), tba, mmfsa);
}

void prom_unmap(unsigned long size, unsigned long vaddr)
{
    p1275_cmd("call-method",
              (P1275_ARG(0, P1275_ARG_IN_STRING) |
               P1275_ARG(2, P1275_ARG_IN_64B) |
               P1275_ARG(3, P1275_ARG_IN_64B) |
               P1275_INOUT(4, 0)),
              "unmap",
              prom_get_mmu_ihandle(),
              size,
              vaddr);
}

void
prom_puts(char *s, int len)
{
	p1275_cmd("write", P1275_ARG(1,P1275_ARG_IN_BUF)|
			   P1275_INOUT(3,1),
			   prom_stdout, s, P1275_SIZE(len));
}

int prom_ihandle2path(int handle, char *buffer, int bufsize)
{
	return p1275_cmd("instance-to-path",
			 P1275_ARG(1,P1275_ARG_OUT_BUF)|
			 P1275_INOUT(3, 1),
			 handle, buffer, P1275_SIZE(bufsize));
}

/* Open the device described by the string 'dstr'.  Returns the handle
 * to that device used for subsequent operations on that device.
 * Returns 0 on failure.
 */
int
prom_devopen(const char *dstr)
{
    return p1275_cmd ("open", P1275_ARG(0,P1275_ARG_IN_STRING)|
                      P1275_INOUT(1,1),
                      dstr);
}

/* Acquire a property 'prop' at node 'node' and place it in
 * 'buffer' which has a size of 'bufsize'.  If the acquisition
 * was successful the length will be returned, else -1 is returned.
 */
inline int prom_getproperty(int node, const char *prop,
			    char *buffer, int bufsize)
{
	int plen;

	plen = prom_getproplen(node, prop);
	if ((plen > bufsize) || (plen == 0) || (plen == -1)) {
		return -1;
	} else {
		/* Ok, things seem all right. */
		return p1275_cmd(prom_getprop_name, 
				 P1275_ARG(1,P1275_ARG_IN_STRING)|
				 P1275_ARG(2,P1275_ARG_OUT_BUF)|
				 P1275_INOUT(4, 1), 
				 node, prop, buffer, P1275_SIZE(plen));
	}
}

/* Return the length in bytes of property 'prop' at node 'node'.
 * Return -1 on error.
 */
inline int prom_getproplen(int node, const char *prop)
{
	if((!node) || (!prop)) return -1;
	return p1275_cmd ("getproplen", 
			  P1275_ARG(1,P1275_ARG_IN_STRING)|
			  P1275_INOUT(2, 1), 
			  node, prop);
}

/* Return the property type string after property type 'oprop'
 * at node 'node' .  Returns NULL string if no more
 * property types for this node.
 */
inline char *prom_nextprop(int node, const char *oprop, char *buffer)
{
	char buf[32];

	if(node == -1) {
		*buffer = 0;
		return buffer;
	}
	if (oprop == buffer) {
		strcpy (buf, oprop);
		oprop = buf;
	}
	p1275_cmd ("nextprop", P1275_ARG(1,P1275_ARG_IN_STRING)|
				    P1275_ARG(2,P1275_ARG_OUT_32B)|
				    P1275_INOUT(3, 0), 
				    node, oprop, buffer); 
	return buffer;
}

/* Reset and reboot the machine with the command 'bcommand'. */
void prom_reboot(const char *bcommand)
{
#ifdef CONFIG_SUN_LDOMS
	if (ldom_domaining_enabled)
		ldom_reboot(bcommand);
#endif
	p1275_cmd("boot", P1275_ARG(0, P1275_ARG_IN_STRING) |
		  P1275_INOUT(1, 0), bcommand);
}

int prom_service_exists(const char *service_name)
{
	int err = p1275_cmd("test", P1275_ARG(0, P1275_ARG_IN_STRING) |
			    P1275_INOUT(1, 1), service_name);

	if (err)
		return 0;
	return 1;
}

/* Return the first property type for node 'node'.
 * buffer should be at least 32B in length
 */
inline char *prom_firstprop(int node, char *buffer)
{
	*buffer = 0;
	if(node == -1) return buffer;
	p1275_cmd ("nextprop", P1275_ARG(2,P1275_ARG_OUT_32B)|
			       P1275_INOUT(3, 0), 
			       node, (char *) 0x0, buffer);
	return buffer;
}

/* Set property 'pname' at node 'node' to value 'value' which has a length
 * of 'size' bytes.  Return the number of bytes the prom accepted.
 */
int
prom_setprop(int node, const char *pname, char *value, int size)
{
	if (size == 0)
		return 0;
	if ((pname == 0) || (value == 0))
		return 0;
	
#ifdef CONFIG_SUN_LDOMS
	if (ldom_domaining_enabled) {
		ldom_set_var(pname, value);
		return 0;
	}
#endif
	return p1275_cmd ("setprop", P1275_ARG(1,P1275_ARG_IN_STRING)|
					  P1275_ARG(2,P1275_ARG_IN_BUF)|
					  P1275_INOUT(4, 1), 
					  node, pname, value, P1275_SIZE(size));
}

int
prom_finddevice(const char *name)
{
	if (!name)
		return 0;
	return p1275_cmd(prom_finddev_name,
			 P1275_ARG(0,P1275_ARG_IN_STRING)|
			 P1275_INOUT(1, 1), 
			 name);
}

/* Non blocking get character from console input device, returns -1
 * if no input was taken.  This can be used for polling.
 */
__inline__ int
prom_nbgetchar(void)
{
	char inc;

	if (p1275_cmd("read", P1275_ARG(1,P1275_ARG_OUT_BUF)|
			      P1275_INOUT(3,1),
			      prom_stdin, &inc, P1275_SIZE(1)) == 1)
		return inc;
	else
		return -1;
}

/* Non blocking put character to console device, returns -1 if
 * unsuccessful.
 */
__inline__ int
prom_nbputchar(char c)
{
	char outc;
	
	outc = c;
	if (p1275_cmd("write", P1275_ARG(1,P1275_ARG_IN_BUF)|
			       P1275_INOUT(3,1),
			       prom_stdout, &outc, P1275_SIZE(1)) == 1)
		return 0;
	else
		return -1;
}