WebSVN – HelenOS – Diff – /trunk/kernel/arch/ppc32/include/asm.h


/*
 * 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.
 */
 
#ifndef __ppc_ASM_H__
#define __ppc_ASM_H__
 
#include <arch/types.h>
#include <config.h>
 
/** Set priority level low
 *
 * Enable interrupts and return previous
 * value of EE.
 */
static inline pri_t cpu_priority_low(void) {
    pri_t v;
    __asm__ volatile (
        "mfmsr %0\n"
        "mfmsr %%r31\n"
        "ori %%r31, %%r31, 1 << 15\n"
        "mtmsr %%r31\n"
        : "=r" (v)
        :
        : "%r31"
    );
    return v;
}
 
/** Set priority level high
 *
 * Disable interrupts and return previous
 * value of EE.
 */
static inline pri_t cpu_priority_high(void) {
    pri_t v;
    __asm__ volatile (
        "mfmsr %0\n"
        "mfmsr %%r31\n"
        "rlwinm %%r31, %%r31, 0, 17, 15\n"
        "mtmsr %%r31\n"
        : "=r" (v)
        :
        : "%r31"
    );
    return v;
}
 
/** Restore priority level
 *
 * Restore EE.
 */
static inline void cpu_priority_restore(pri_t pri) {
    __asm__ volatile (
        "mfmsr %%r31\n"
        "rlwimi  %0, %%r31, 0, 17, 15\n"
        "mtmsr %0\n"
        : "=r" (pri)
        : "0" (pri)
        : "%r31"
    );
}
 
/* TODO: implement the real stuff */
static inline __address get_stack_base(void)
{
    return NULL;
}
 
void cpu_sleep(void);
void asm_delay_loop(__u32 t);
 
#endif
 

Rev 201	Rev 204
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	#ifndef __ppc_ASM_H__	29	#ifndef __ppc_ASM_H__
30	#define __ppc_ASM_H__	30	#define __ppc_ASM_H__
31		31
32	#include <arch/types.h>	32	#include <arch/types.h>
33	#include <config.h>	33	#include <config.h>
34		34
35	/** Set priority level low	35	/** Set priority level low
36	*	36	*
37	* Enable interrupts and return previous	37	* Enable interrupts and return previous
38	* value of EE.	38	* value of EE.
39	*/	39	*/
40	static inline pri_t cpu_priority_low(void) {	40	static inline pri_t cpu_priority_low(void) {
41	pri_t v;	41	pri_t v;
42	__asm__ volatile (	42	__asm__ volatile (
43	"\n"	43	"mfmsr %0\n"
-		44	"mfmsr %%r31\n"
-		45	"ori %%r31, %%r31, 1 << 15\n"
-		46	"mtmsr %%r31\n"
44	: "=r" (v)	47	: "=r" (v)
-		48	:
-		49	: "%r31"
45	);	50	);
46	return v;	51	return v;
47	}	52	}
48		53
49	/** Set priority level high	54	/** Set priority level high
50	*	55	*
51	* Disable interrupts and return previous	56	* Disable interrupts and return previous
52	* value of EE.	57	* value of EE.
53	*/	58	*/
54	static inline pri_t cpu_priority_high(void) {	59	static inline pri_t cpu_priority_high(void) {
55	pri_t v;	60	pri_t v;
56	__asm__ volatile (	61	__asm__ volatile (
57	"\n"	62	"mfmsr %0\n"
-		63	"mfmsr %%r31\n"
-		64	"rlwinm %%r31, %%r31, 0, 17, 15\n"
-		65	"mtmsr %%r31\n"
58	: "=r" (v)	66	: "=r" (v)
-		67	:
-		68	: "%r31"
59	);	69	);
60	return v;	70	return v;
61	}	71	}
62		72
63	/** Restore priority level	73	/** Restore priority level
64	*	74	*
65	* Restore EE.	75	* Restore EE.
66	*/	76	*/
67	static inline void cpu_priority_restore(pri_t pri) {	77	static inline void cpu_priority_restore(pri_t pri) {
68	__asm__ volatile (	78	__asm__ volatile (
-		79	"mfmsr %%r31\n"
-		80	"rlwimi %0, %%r31, 0, 17, 15\n"
69	"\n"	81	"mtmsr %0\n"
70	: : "r" (pri)	82	: "=r" (pri)
-		83	: "0" (pri)
-		84	: "%r31"
71	);	85	);
72	}	86	}
73		87
74	/* TODO: implement the real stuff */	88	/* TODO: implement the real stuff */
75	static inline __address get_stack_base(void)	89	static inline __address get_stack_base(void)
76	{	90	{
77	return NULL;	91	return NULL;
78	}	92	}
79		93
80	void cpu_sleep(void);	94	void cpu_sleep(void);
81	void asm_delay_loop(__u32 t);	95	void asm_delay_loop(__u32 t);
82		96
83	#endif	97	#endif
84		98

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/ppc32/include/asm.h @ 2071 – Rev 201 → 204