WebSVN – HelenOS-historic – Diff – /kernel/trunk/genarch/src/ofw/ofw.c


/*
 * Copyright (C) 2005 Martin Decky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * 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.
 */
 
/** @addtogroup genarch
 * @{
 */
/** @file
 */
 
#include <genarch/ofw/ofw.h>
#include <arch/asm.h>
#include <stdarg.h>
#include <cpu.h>
#include <arch/types.h>
 
ofw_entry ofw;
 
phandle ofw_chosen;
ihandle ofw_stdin;
ihandle ofw_stdout;
 
void ofw_init(void)
{
    ofw_chosen = ofw_find_device("/chosen");
    if (ofw_chosen == -1)
        ofw_done();
   
    if (ofw_get_property(ofw_chosen, "stdin",  &ofw_stdin, sizeof(ofw_stdin)) <= 0)
        ofw_stdin = 0;
       
    if (ofw_get_property(ofw_chosen, "stdout",  &ofw_stdout, sizeof(ofw_stdout)) <= 0)
        ofw_stdout = 0;
}
 
void ofw_done(void)
{
    (void) ofw_call("exit", 0, 0);
    cpu_halt();
}
 
__native ofw_call(const char *service, const int nargs, const int nret, ...)
{
    va_list list;
    ofw_args_t args;
    int i;
   
    args.service = service;
    args.nargs = nargs;
    args.nret = nret;
   
    va_start(list, nret);
    for (i = 0; i < nargs; i++)
        args.args[i] = va_arg(list, ofw_arg_t);
    va_end(list);
   
    for (i = 0; i < nret; i++)
        args.args[i + nargs] = 0;
   
    ofw(&args);
   
    return args.args[nargs];
}
 
void ofw_putchar(const char ch)
{
    if (ofw_stdout == 0)
        return;
   
    (void) ofw_call("write", 3, 1, ofw_stdout, &ch, 1);
}
 
/** Read character from OFW's input.
 *
 * This call is non-blocking.
 *
 * @return 0 if no character was read, character read otherwise.
 */
char ofw_getchar(void)
{
    char ch;
 
    if (ofw_stdin == 0)
        return 0;
   
    if (ofw_call("read", 3, 1, ofw_stdin, &ch, 1) == 1)
        return ch;
    else
        return 0;
}
 
phandle ofw_find_device(const char *name)
{
    return (phandle) ofw_call("finddevice", 1, 1, name);
}
 
int ofw_get_property(const phandle device, const char *name, void *buf, const int buflen)
{
    return (int) ofw_call("getprop", 4, 1, device, name, buf, buflen);
}
 
void *ofw_claim(const void *addr, const int size, const int align)
{
    return (void *) ofw_call("claim", 3, 1, addr, size, align);
}
 
/** @}
 */
 
 

Rev 1702	Rev 1777
1	/*	1	/*
2	* Copyright (C) 2005 Martin Decky	2	* Copyright (C) 2005 Martin Decky
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup genarch	29	/** @addtogroup genarch
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <genarch/ofw/ofw.h>	35	#include <genarch/ofw/ofw.h>
36	#include <arch/asm.h>	36	#include <arch/asm.h>
37	#include <stdarg.h>	37	#include <stdarg.h>
38	#include <cpu.h>	38	#include <cpu.h>
39	#include <arch/types.h>	39	#include <arch/types.h>
40		40
41	ofw_entry ofw;	41	ofw_entry ofw;
42		42
43	phandle ofw_chosen;	43	phandle ofw_chosen;
44	ihandle ofw_stdin;	44	ihandle ofw_stdin;
45	ihandle ofw_stdout;	45	ihandle ofw_stdout;
46		46
47	void ofw_init(void)	47	void ofw_init(void)
48	{	48	{
49	ofw_chosen = ofw_find_device("/chosen");	49	ofw_chosen = ofw_find_device("/chosen");
50	if (ofw_chosen == -1)	50	if (ofw_chosen == -1)
51	ofw_done();	51	ofw_done();
52		52
53	if (ofw_get_property(ofw_chosen, "stdin", &ofw_stdin, sizeof(ofw_stdin)) <= 0)	53	if (ofw_get_property(ofw_chosen, "stdin", &ofw_stdin, sizeof(ofw_stdin)) <= 0)
54	ofw_stdin = 0;	54	ofw_stdin = 0;
55		55
56	if (ofw_get_property(ofw_chosen, "stdout", &ofw_stdout, sizeof(ofw_stdout)) <= 0)	56	if (ofw_get_property(ofw_chosen, "stdout", &ofw_stdout, sizeof(ofw_stdout)) <= 0)
57	ofw_stdout = 0;	57	ofw_stdout = 0;
58	}	58	}
59		59
60	void ofw_done(void)	60	void ofw_done(void)
61	{	61	{
62	(void) ofw_call("exit", 0, 0);	62	(void) ofw_call("exit", 0, 0);
63	cpu_halt();	63	cpu_halt();
64	}	64	}
65		65
66	__native ofw_call(const char *service, const int nargs, const int nret, ...)	66	__native ofw_call(const char *service, const int nargs, const int nret, ...)
67	{	67	{
68	va_list list;	68	va_list list;
69	ofw_args_t args;	69	ofw_args_t args;
70	int i;	70	int i;
71		71
72	args.service = service;	72	args.service = service;
73	args.nargs = nargs;	73	args.nargs = nargs;
74	args.nret = nret;	74	args.nret = nret;
75		75
76	va_start(list, nret);	76	va_start(list, nret);
77	for (i = 0; i < nargs; i++)	77	for (i = 0; i < nargs; i++)
78	args.args[i] = va_arg(list, ofw_arg_t);	78	args.args[i] = va_arg(list, ofw_arg_t);
79	va_end(list);	79	va_end(list);
80		80
81	for (i = 0; i < nret; i++)	81	for (i = 0; i < nret; i++)
82	args.args[i + nargs] = 0;	82	args.args[i + nargs] = 0;
83		83
84	ofw(&args);	84	ofw(&args);
85		85
86	return args.args[nargs];	86	return args.args[nargs];
87	}	87	}
88		88
89	void ofw_putchar(const char ch)	89	void ofw_putchar(const char ch)
90	{	90	{
91	if (ofw_stdout == 0)	91	if (ofw_stdout == 0)
92	return;	92	return;
93		93
94	(void) ofw_call("write", 3, 1, ofw_stdout, &ch, 1);	94	(void) ofw_call("write", 3, 1, ofw_stdout, &ch, 1);
95	}	95	}
96		96
97	/** Read character from OFW's input.	97	/** Read character from OFW's input.
98	*	98	*
99	* This call is non-blocking.	99	* This call is non-blocking.
100	*	100	*
101	* @return 0 if no character was read, character read otherwise.	101	* @return 0 if no character was read, character read otherwise.
102	*/	102	*/
103	char ofw_getchar(void)	103	char ofw_getchar(void)
104	{	104	{
105	char ch;	105	char ch;
106		106
107	if (ofw_stdin == 0)	107	if (ofw_stdin == 0)
108	return 0;	108	return 0;
109		109
110	if (ofw_call("read", 3, 1, ofw_stdin, &ch, 1) == 1)	110	if (ofw_call("read", 3, 1, ofw_stdin, &ch, 1) == 1)
111	return ch;	111	return ch;
112	else	112	else
113	return 0;	113	return 0;
114	}	114	}
115		115
116	phandle ofw_find_device(const char *name)	116	phandle ofw_find_device(const char *name)
117	{	117	{
118	return (phandle) ofw_call("finddevice", 1, 1, name);	118	return (phandle) ofw_call("finddevice", 1, 1, name);
119	}	119	}
120		120
121	int ofw_get_property(const phandle device, const char name, void buf, const int buflen)	121	int ofw_get_property(const phandle device, const char name, void buf, const int buflen)
122	{	122	{
123	return (int) ofw_call("getprop", 4, 1, device, name, buf, buflen);	123	return (int) ofw_call("getprop", 4, 1, device, name, buf, buflen);
124	}	124	}
125		125
126	void ofw_claim(const void addr, const int size, const int align)	126	void ofw_claim(const void addr, const int size, const int align)
127	{	127	{
128	return (void *) ofw_call("claim", 3, 1, addr, size, align);	128	return (void *) ofw_call("claim", 3, 1, addr, size, align);
129	}	129	}
130		130
131	/** @}	131	/** @}
132	*/	132	*/
133		-
134		133

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/genarch/src/ofw/ofw.c – Rev 1702 → 1777