WebSVN – HelenOS – Diff – /tags/0.2.0/kernel/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.
 */
 
#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 1964	Rev 1968
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	#include <genarch/ofw/ofw.h>	29	#include <genarch/ofw/ofw.h>
30	#include <arch/asm.h>	30	#include <arch/asm.h>
31	#include <stdarg.h>	31	#include <stdarg.h>
32	#include <cpu.h>	32	#include <cpu.h>
33	#include <arch/types.h>	33	#include <arch/types.h>
34		34
35	ofw_entry ofw;	35	ofw_entry ofw;
36		36
37	phandle ofw_chosen;	37	phandle ofw_chosen;
38	ihandle ofw_stdin;	38	ihandle ofw_stdin;
39	ihandle ofw_stdout;	39	ihandle ofw_stdout;
40		40
41	void ofw_init(void)	41	void ofw_init(void)
42	{	42	{
43	ofw_chosen = ofw_find_device("/chosen");	43	ofw_chosen = ofw_find_device("/chosen");
44	if (ofw_chosen == -1)	44	if (ofw_chosen == -1)
45	ofw_done();	45	ofw_done();
46		46
47	if (ofw_get_property(ofw_chosen, "stdin", &ofw_stdin, sizeof(ofw_stdin)) <= 0)	47	if (ofw_get_property(ofw_chosen, "stdin", &ofw_stdin, sizeof(ofw_stdin)) <= 0)
48	ofw_stdin = 0;	48	ofw_stdin = 0;
49		49
50	if (ofw_get_property(ofw_chosen, "stdout", &ofw_stdout, sizeof(ofw_stdout)) <= 0)	50	if (ofw_get_property(ofw_chosen, "stdout", &ofw_stdout, sizeof(ofw_stdout)) <= 0)
51	ofw_stdout = 0;	51	ofw_stdout = 0;
52	}	52	}
53		53
54	void ofw_done(void)	54	void ofw_done(void)
55	{	55	{
56	(void) ofw_call("exit", 0, 0);	56	(void) ofw_call("exit", 0, 0);
57	cpu_halt();	57	cpu_halt();
58	}	58	}
59		59
60	__native ofw_call(const char *service, const int nargs, const int nret, ...)	60	__native ofw_call(const char *service, const int nargs, const int nret, ...)
61	{	61	{
62	va_list list;	62	va_list list;
63	ofw_args_t args;	63	ofw_args_t args;
64	int i;	64	int i;
65		65
66	args.service = service;	66	args.service = service;
67	args.nargs = nargs;	67	args.nargs = nargs;
68	args.nret = nret;	68	args.nret = nret;
69		69
70	va_start(list, nret);	70	va_start(list, nret);
71	for (i = 0; i < nargs; i++)	71	for (i = 0; i < nargs; i++)
72	args.args[i] = va_arg(list, ofw_arg_t);	72	args.args[i] = va_arg(list, ofw_arg_t);
73	va_end(list);	73	va_end(list);
74		74
75	for (i = 0; i < nret; i++)	75	for (i = 0; i < nret; i++)
76	args.args[i + nargs] = 0;	76	args.args[i + nargs] = 0;
77		77
78	ofw(&args);	78	ofw(&args);
79		79
80	return args.args[nargs];	80	return args.args[nargs];
81	}	81	}
82		82
83	void ofw_putchar(const char ch)	83	void ofw_putchar(const char ch)
84	{	84	{
85	if (ofw_stdout == 0)	85	if (ofw_stdout == 0)
86	return;	86	return;
87		87
88	(void) ofw_call("write", 3, 1, ofw_stdout, &ch, 1);	88	(void) ofw_call("write", 3, 1, ofw_stdout, &ch, 1);
89	}	89	}
90		90
91	/** Read character from OFW's input.	91	/** Read character from OFW's input.
92	*	92	*
93	* This call is non-blocking.	93	* This call is non-blocking.
94	*	94	*
95	* @return 0 if no character was read, character read otherwise.	95	* @return 0 if no character was read, character read otherwise.
96	*/	96	*/
97	char ofw_getchar(void)	97	char ofw_getchar(void)
98	{	98	{
99	char ch;	99	char ch;
100		100
101	if (ofw_stdin == 0)	101	if (ofw_stdin == 0)
102	return 0;	102	return 0;
103		103
104	if (ofw_call("read", 3, 1, ofw_stdin, &ch, 1) == 1)	104	if (ofw_call("read", 3, 1, ofw_stdin, &ch, 1) == 1)
105	return ch;	105	return ch;
106	else	106	else
107	return 0;	107	return 0;
108	}	108	}
109		109
110	phandle ofw_find_device(const char *name)	110	phandle ofw_find_device(const char *name)
111	{	111	{
112	return (phandle) ofw_call("finddevice", 1, 1, name);	112	return (phandle) ofw_call("finddevice", 1, 1, name);
113	}	113	}
114		114
115	int ofw_get_property(const phandle device, const char name, void buf, const int buflen)	115	int ofw_get_property(const phandle device, const char name, void buf, const int buflen)
116	{	116	{
117	return (int) ofw_call("getprop", 4, 1, device, name, buf, buflen);	117	return (int) ofw_call("getprop", 4, 1, device, name, buf, buflen);
118	}	118	}
119		119
120	void ofw_claim(const void addr, const int size, const int align)	120	void ofw_claim(const void addr, const int size, const int align)
121	{	121	{
122	return (void *) ofw_call("claim", 3, 1, addr, size, align);	122	return (void *) ofw_call("claim", 3, 1, addr, size, align);
123	}	123	}
124		124

Subversion Repositories HelenOS

(root)/tags/0.2.0/kernel/genarch/src/ofw/ofw.c @ 4751 – Rev 1964 → 1968