WebSVN – HelenOS-historic – Diff – /kernel/trunk/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.
 */
 
 /** @addtogroup ppc32 
 * @{
 */
/** @file
 */
 
#ifndef __ppc32_ASM_H__
#define __ppc32_ASM_H__
 
#include <arch/types.h>
#include <config.h>
 
/** Enable interrupts.
 *
 * Enable interrupts and return previous
 * value of EE.
 *
 * @return Old interrupt priority level.
 */
static inline ipl_t interrupts_enable(void)
{
    ipl_t v;
    ipl_t tmp;
   
    asm volatile (
        "mfmsr %0\n"
        "mfmsr %1\n"
        "ori %1, %1, 1 << 15\n"
        "mtmsr %1\n"
        : "=r" (v), "=r" (tmp)
    );
    return v;
}
 
/** Disable interrupts.
 *
 * Disable interrupts and return previous
 * value of EE.
 *
 * @return Old interrupt priority level.
 */
static inline ipl_t interrupts_disable(void)
{
    ipl_t v;
    ipl_t tmp;
   
    asm volatile (
        "mfmsr %0\n"
        "mfmsr %1\n"
        "rlwinm %1, %1, 0, 17, 15\n"
        "mtmsr %1\n"
        : "=r" (v), "=r" (tmp)
    );
    return v;
}
 
/** Restore interrupt priority level.
 *
 * Restore EE.
 *
 * @param ipl Saved interrupt priority level.
 */
static inline void interrupts_restore(ipl_t ipl)
{
    ipl_t tmp;
   
    asm volatile (
        "mfmsr %1\n"
        "rlwimi  %0, %1, 0, 17, 15\n"
        "cmpw 0, %0, %1\n"
        "beq 0f\n"
        "mtmsr %0\n"
        "0:\n"
        : "=r" (ipl), "=r" (tmp)
        : "0" (ipl)
        : "cr0"
    );
}
 
/** Return interrupt priority level.
 *
 * Return EE.
 *
 * @return Current interrupt priority level.
 */
static inline ipl_t interrupts_read(void)
{
    ipl_t v;
   
    asm volatile (
        "mfmsr %0\n"
        : "=r" (v)
    );
    return v;
}
 
/** Return base address of current stack.
 *
 * Return the base address of the current stack.
 * The stack is assumed to be STACK_SIZE bytes long.
 * The stack must start on page boundary.
 */
static inline __address get_stack_base(void)
{
    __address v;
   
    asm volatile (
        "and %0, %%sp, %1\n"
        : "=r" (v)
        : "r" (~(STACK_SIZE - 1))
    );
    return v;
}
 
static inline void cpu_sleep(void)
{
}
 
void cpu_halt(void);
void asm_delay_loop(__u32 t);
 
extern void userspace_asm(__address uspace_uarg, __address stack, __address entry);
 
#endif
 
 /** @}
 */
 
 

Rev 1378	Rev 1702
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 ppc32
-		30	* @{
-		31	*/
-		32	/** @file
-		33	*/
-		34
29	#ifndef __ppc32_ASM_H__	35	#ifndef __ppc32_ASM_H__
30	#define __ppc32_ASM_H__	36	#define __ppc32_ASM_H__
31		37
32	#include <arch/types.h>	38	#include <arch/types.h>
33	#include <config.h>	39	#include <config.h>
34		40
35	/** Enable interrupts.	41	/** Enable interrupts.
36	*	42	*
37	* Enable interrupts and return previous	43	* Enable interrupts and return previous
38	* value of EE.	44	* value of EE.
39	*	45	*
40	* @return Old interrupt priority level.	46	* @return Old interrupt priority level.
41	*/	47	*/
42	static inline ipl_t interrupts_enable(void)	48	static inline ipl_t interrupts_enable(void)
43	{	49	{
44	ipl_t v;	50	ipl_t v;
45	ipl_t tmp;	51	ipl_t tmp;
46		52
47	asm volatile (	53	asm volatile (
48	"mfmsr %0\n"	54	"mfmsr %0\n"
49	"mfmsr %1\n"	55	"mfmsr %1\n"
50	"ori %1, %1, 1 << 15\n"	56	"ori %1, %1, 1 << 15\n"
51	"mtmsr %1\n"	57	"mtmsr %1\n"
52	: "=r" (v), "=r" (tmp)	58	: "=r" (v), "=r" (tmp)
53	);	59	);
54	return v;	60	return v;
55	}	61	}
56		62
57	/** Disable interrupts.	63	/** Disable interrupts.
58	*	64	*
59	* Disable interrupts and return previous	65	* Disable interrupts and return previous
60	* value of EE.	66	* value of EE.
61	*	67	*
62	* @return Old interrupt priority level.	68	* @return Old interrupt priority level.
63	*/	69	*/
64	static inline ipl_t interrupts_disable(void)	70	static inline ipl_t interrupts_disable(void)
65	{	71	{
66	ipl_t v;	72	ipl_t v;
67	ipl_t tmp;	73	ipl_t tmp;
68		74
69	asm volatile (	75	asm volatile (
70	"mfmsr %0\n"	76	"mfmsr %0\n"
71	"mfmsr %1\n"	77	"mfmsr %1\n"
72	"rlwinm %1, %1, 0, 17, 15\n"	78	"rlwinm %1, %1, 0, 17, 15\n"
73	"mtmsr %1\n"	79	"mtmsr %1\n"
74	: "=r" (v), "=r" (tmp)	80	: "=r" (v), "=r" (tmp)
75	);	81	);
76	return v;	82	return v;
77	}	83	}
78		84
79	/** Restore interrupt priority level.	85	/** Restore interrupt priority level.
80	*	86	*
81	* Restore EE.	87	* Restore EE.
82	*	88	*
83	* @param ipl Saved interrupt priority level.	89	* @param ipl Saved interrupt priority level.
84	*/	90	*/
85	static inline void interrupts_restore(ipl_t ipl)	91	static inline void interrupts_restore(ipl_t ipl)
86	{	92	{
87	ipl_t tmp;	93	ipl_t tmp;
88		94
89	asm volatile (	95	asm volatile (
90	"mfmsr %1\n"	96	"mfmsr %1\n"
91	"rlwimi %0, %1, 0, 17, 15\n"	97	"rlwimi %0, %1, 0, 17, 15\n"
92	"cmpw 0, %0, %1\n"	98	"cmpw 0, %0, %1\n"
93	"beq 0f\n"	99	"beq 0f\n"
94	"mtmsr %0\n"	100	"mtmsr %0\n"
95	"0:\n"	101	"0:\n"
96	: "=r" (ipl), "=r" (tmp)	102	: "=r" (ipl), "=r" (tmp)
97	: "0" (ipl)	103	: "0" (ipl)
98	: "cr0"	104	: "cr0"
99	);	105	);
100	}	106	}
101		107
102	/** Return interrupt priority level.	108	/** Return interrupt priority level.
103	*	109	*
104	* Return EE.	110	* Return EE.
105	*	111	*
106	* @return Current interrupt priority level.	112	* @return Current interrupt priority level.
107	*/	113	*/
108	static inline ipl_t interrupts_read(void)	114	static inline ipl_t interrupts_read(void)
109	{	115	{
110	ipl_t v;	116	ipl_t v;
111		117
112	asm volatile (	118	asm volatile (
113	"mfmsr %0\n"	119	"mfmsr %0\n"
114	: "=r" (v)	120	: "=r" (v)
115	);	121	);
116	return v;	122	return v;
117	}	123	}
118		124
119	/** Return base address of current stack.	125	/** Return base address of current stack.
120	*	126	*
121	* Return the base address of the current stack.	127	* Return the base address of the current stack.
122	* The stack is assumed to be STACK_SIZE bytes long.	128	* The stack is assumed to be STACK_SIZE bytes long.
123	* The stack must start on page boundary.	129	* The stack must start on page boundary.
124	*/	130	*/
125	static inline __address get_stack_base(void)	131	static inline __address get_stack_base(void)
126	{	132	{
127	__address v;	133	__address v;
128		134
129	asm volatile (	135	asm volatile (
130	"and %0, %%sp, %1\n"	136	"and %0, %%sp, %1\n"
131	: "=r" (v)	137	: "=r" (v)
132	: "r" (~(STACK_SIZE - 1))	138	: "r" (~(STACK_SIZE - 1))
133	);	139	);
134	return v;	140	return v;
135	}	141	}
136		142
137	static inline void cpu_sleep(void)	143	static inline void cpu_sleep(void)
138	{	144	{
139	}	145	}
140		146
141	void cpu_halt(void);	147	void cpu_halt(void);
142	void asm_delay_loop(__u32 t);	148	void asm_delay_loop(__u32 t);
143		149
144	extern void userspace_asm(__address uspace_uarg, __address stack, __address entry);	150	extern void userspace_asm(__address uspace_uarg, __address stack, __address entry);
145		151
146	#endif	152	#endif
-		153
-		154	/** @}
-		155	*/
-		156
147		157

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/ppc32/include/asm.h @ 1780 – Rev 1378 → 1702