WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/ia64/include/asm.h


/*
 * Copyright (C) 2005 Jakub Jermar
 * 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 __ia64_ASM_H__
#define __ia64_ASM_H__
 
#include <config.h>
#include <arch/types.h>
#include <arch/register.h>
 
/** Return base address of current stack
 *
 * Return the base address of the current stack.
 * The stack is assumed to be STACK_SIZE long.
 * The stack must start on page boundary.
 */
static inline __address get_stack_base(void)
{
    __u64 v;
 
    __asm__ volatile ("and %0 = %1, r12" : "=r" (v) : "r" (~(STACK_SIZE-1)));
   
    return v;
}
 
/** Return Processor State Register.
 *
 * @return PSR.
 */
static inline __u64 psr_read(void)
{
    __u64 v;
   
    __asm__ volatile ("mov %0 = psr\n" : "=r" (v));
   
    return v;
}
 
/** Read IVA (Interruption Vector Address).
 *
 * @return Return location of interruption vector table.
 */
static inline __u64 iva_read(void)
{
    __u64 v;
   
    __asm__ volatile ("mov %0 = cr.iva\n" : "=r" (v));
   
    return v;
}
 
/** Write IVA (Interruption Vector Address) register.
 *
 * @param New location of interruption vector table.
 */
static inline void iva_write(__u64 v)
{
    __asm__ volatile ("mov cr.iva = %0\n" : : "r" (v));
}
 
 
/** Read IVR (External Interrupt Vector Register).
 *
 * @return Highest priority, pending, unmasked external interrupt vector.
 */
static inline __u64 ivr_read(void)
{
    __u64 v;
   
    __asm__ volatile ("mov %0 = cr.ivr\n" : "=r" (v));
   
    return v;
}
 
/** Write ITC (Interval Timer Counter) register.
 *
 * @param New counter value.
 */
static inline void itc_write(__u64 v)
{
    __asm__ volatile ("mov ar.itc = %0\n" : : "r" (v));
}
 
/** Read ITC (Interval Timer Counter) register.
 *
 * @return Current counter value.
 */
static inline __u64 itc_read(void)
{
    __u64 v;
   
    __asm__ volatile ("mov %0 = ar.itc\n" : "=r" (v));
   
    return v;
}
 
/** Write ITM (Interval Timer Match) register.
 *
 * @param New match value.
 */
static inline void itm_write(__u64 v)
{
    __asm__ volatile ("mov cr.itm = %0\n" : : "r" (v));
}
 
/** Read ITV (Interval Timer Vector) register.
 *
 * @return Current vector and mask bit.
 */
static inline __u64 itv_read(void)
{
    __u64 v;
   
    __asm__ volatile ("mov %0 = cr.itv\n" : "=r" (v));
   
    return v;
}
 
/** Write ITV (Interval Timer Vector) register.
 *
 * @param New vector and mask bit.
 */
static inline void itv_write(__u64 v)
{
    __asm__ volatile ("mov cr.itv = %0\n" : : "r" (v));
}
 
/** Write EOI (End Of Interrupt) register.
 *
 * @param This value is ignored.
 */
static inline void eoi_write(__u64 v)
{
    __asm__ volatile ("mov cr.eoi = %0\n" : : "r" (v));
}
 
/** Read TPR (Task Priority Register).
 *
 * @return Current value of TPR.
 */
static inline __u64 tpr_read(void)
{
    __u64 v;
 
    __asm__ volatile ("mov %0 = cr.tpr\n"  : "=r" (v));
   
    return v;
}
 
/** Write TPR (Task Priority Register).
 *
 * @param New value of TPR.
 */
static inline void tpr_write(__u64 v)
{
    __asm__ volatile ("mov cr.tpr = %0\n" : : "r" (v));
}
 
/** Disable interrupts.
 *
 * Disable interrupts and return previous
 * value of PSR.
 *
 * @return Old interrupt priority level.
 */
static ipl_t interrupts_disable(void)
{
    __u64 v;
   
    __asm__ volatile (
        "mov %0 = psr\n"
        "rsm %1\n"
        : "=r" (v)
        : "i" (PSR_I_MASK)
    );
   
    return (ipl_t) v;
}
 
/** Enable interrupts.
 *
 * Enable interrupts and return previous
 * value of PSR.
 *
 * @return Old interrupt priority level.
 */
static ipl_t interrupts_enable(void)
{
    __u64 v;
   
    __asm__ volatile (
        "mov %0 = psr\n"
        "ssm %1\n"
        ";;\n"
        "srlz.d\n"
        : "=r" (v)
        : "i" (PSR_I_MASK)
    );
   
    return (ipl_t) v;
}
 
/** Restore interrupt priority level.
 *
 * Restore PSR.
 *
 * @param ipl Saved interrupt priority level.
 */
static inline void interrupts_restore(ipl_t ipl)
{
    if (ipl & PSR_I_MASK)
        (void) interrupts_enable();
    else
        (void) interrupts_disable();
}
 
/** Return interrupt priority level.
 *
 * @return PSR.
 */
static inline ipl_t interrupts_read(void)
{
    return (ipl_t) psr_read();
}
 
/** Disable protection key checking. */
static inline void pk_disable(void)
{
    __asm__ volatile ("rsm %0\n" : : "i" (PSR_PK_MASK));
}
 
extern void cpu_halt(void);
extern void cpu_sleep(void);
extern void asm_delay_loop(__u32 t);
 
extern void switch_to_userspace(__address entry, __address sp, __address bsp, __address uspace_uarg, __u64 ipsr, __u64 rsc);
 
#endif
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/ia64/include/asm.h – Rev 919 → 1078

Rev 919		Rev 1078
1	/*	1	/*
2	* Copyright (C) 2005 Jakub Jermar	2	* Copyright (C) 2005 Jakub Jermar
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 __ia64_ASM_H__	29	#ifndef __ia64_ASM_H__
30	#define __ia64_ASM_H__	30	#define __ia64_ASM_H__
31		31
32	#include <config.h>	32	#include <config.h>
33	#include <arch/types.h>	33	#include <arch/types.h>
34	#include <arch/register.h>	34	#include <arch/register.h>
35		35
36	/** Return base address of current stack	36	/** Return base address of current stack
37	*	37	*
38	* Return the base address of the current stack.	38	* Return the base address of the current stack.
39	* The stack is assumed to be STACK_SIZE long.	39	* The stack is assumed to be STACK_SIZE long.
40	* The stack must start on page boundary.	40	* The stack must start on page boundary.
41	*/	41	*/
42	static inline __address get_stack_base(void)	42	static inline __address get_stack_base(void)
43	{	43	{
44	__u64 v;	44	__u64 v;
45		45
46	__asm__ volatile ("and %0 = %1, r12" : "=r" (v) : "r" (~(STACK_SIZE-1)));	46	__asm__ volatile ("and %0 = %1, r12" : "=r" (v) : "r" (~(STACK_SIZE-1)));
47		47
48	return v;	48	return v;
49	}	49	}
50		50
51	/** Return Processor State Register.	51	/** Return Processor State Register.
52	*	52	*
53	* @return PSR.	53	* @return PSR.
54	*/	54	*/
55	static inline __u64 psr_read(void)	55	static inline __u64 psr_read(void)
56	{	56	{
57	__u64 v;	57	__u64 v;
58		58
59	__asm__ volatile ("mov %0 = psr\n" : "=r" (v));	59	__asm__ volatile ("mov %0 = psr\n" : "=r" (v));
60		60
61	return v;	61	return v;
62	}	62	}
63		63
64	/** Read IVA (Interruption Vector Address).	64	/** Read IVA (Interruption Vector Address).
65	*	65	*
66	* @return Return location of interruption vector table.	66	* @return Return location of interruption vector table.
67	*/	67	*/
68	static inline __u64 iva_read(void)	68	static inline __u64 iva_read(void)
69	{	69	{
70	__u64 v;	70	__u64 v;
71		71
72	__asm__ volatile ("mov %0 = cr.iva\n" : "=r" (v));	72	__asm__ volatile ("mov %0 = cr.iva\n" : "=r" (v));
73		73
74	return v;	74	return v;
75	}	75	}
76		76
77	/** Write IVA (Interruption Vector Address) register.	77	/** Write IVA (Interruption Vector Address) register.
78	*	78	*
79	* @param New location of interruption vector table.	79	* @param New location of interruption vector table.
80	*/	80	*/
81	static inline void iva_write(__u64 v)	81	static inline void iva_write(__u64 v)
82	{	82	{
83	__asm__ volatile ("mov cr.iva = %0\n" : : "r" (v));	83	__asm__ volatile ("mov cr.iva = %0\n" : : "r" (v));
84	}	84	}
85		85
86		86
87	/** Read IVR (External Interrupt Vector Register).	87	/** Read IVR (External Interrupt Vector Register).
88	*	88	*
89	* @return Highest priority, pending, unmasked external interrupt vector.	89	* @return Highest priority, pending, unmasked external interrupt vector.
90	*/	90	*/
91	static inline __u64 ivr_read(void)	91	static inline __u64 ivr_read(void)
92	{	92	{
93	__u64 v;	93	__u64 v;
94		94
95	__asm__ volatile ("mov %0 = cr.ivr\n" : "=r" (v));	95	__asm__ volatile ("mov %0 = cr.ivr\n" : "=r" (v));
96		96
97	return v;	97	return v;
98	}	98	}
99		99
100	/** Write ITC (Interval Timer Counter) register.	100	/** Write ITC (Interval Timer Counter) register.
101	*	101	*
102	* @param New counter value.	102	* @param New counter value.
103	*/	103	*/
104	static inline void itc_write(__u64 v)	104	static inline void itc_write(__u64 v)
105	{	105	{
106	__asm__ volatile ("mov ar.itc = %0\n" : : "r" (v));	106	__asm__ volatile ("mov ar.itc = %0\n" : : "r" (v));
107	}	107	}
108		108
109	/** Read ITC (Interval Timer Counter) register.	109	/** Read ITC (Interval Timer Counter) register.
110	*	110	*
111	* @return Current counter value.	111	* @return Current counter value.
112	*/	112	*/
113	static inline __u64 itc_read(void)	113	static inline __u64 itc_read(void)
114	{	114	{
115	__u64 v;	115	__u64 v;
116		116
117	__asm__ volatile ("mov %0 = ar.itc\n" : "=r" (v));	117	__asm__ volatile ("mov %0 = ar.itc\n" : "=r" (v));
118		118
119	return v;	119	return v;
120	}	120	}
121		121
122	/** Write ITM (Interval Timer Match) register.	122	/** Write ITM (Interval Timer Match) register.
123	*	123	*
124	* @param New match value.	124	* @param New match value.
125	*/	125	*/
126	static inline void itm_write(__u64 v)	126	static inline void itm_write(__u64 v)
127	{	127	{
128	__asm__ volatile ("mov cr.itm = %0\n" : : "r" (v));	128	__asm__ volatile ("mov cr.itm = %0\n" : : "r" (v));
129	}	129	}
130		130
131	/** Read ITV (Interval Timer Vector) register.	131	/** Read ITV (Interval Timer Vector) register.
132	*	132	*
133	* @return Current vector and mask bit.	133	* @return Current vector and mask bit.
134	*/	134	*/
135	static inline __u64 itv_read(void)	135	static inline __u64 itv_read(void)
136	{	136	{
137	__u64 v;	137	__u64 v;
138		138
139	__asm__ volatile ("mov %0 = cr.itv\n" : "=r" (v));	139	__asm__ volatile ("mov %0 = cr.itv\n" : "=r" (v));
140		140
141	return v;	141	return v;
142	}	142	}
143		143
144	/** Write ITV (Interval Timer Vector) register.	144	/** Write ITV (Interval Timer Vector) register.
145	*	145	*
146	* @param New vector and mask bit.	146	* @param New vector and mask bit.
147	*/	147	*/
148	static inline void itv_write(__u64 v)	148	static inline void itv_write(__u64 v)
149	{	149	{
150	__asm__ volatile ("mov cr.itv = %0\n" : : "r" (v));	150	__asm__ volatile ("mov cr.itv = %0\n" : : "r" (v));
151	}	151	}
152		152
153	/** Write EOI (End Of Interrupt) register.	153	/** Write EOI (End Of Interrupt) register.
154	*	154	*
155	* @param This value is ignored.	155	* @param This value is ignored.
156	*/	156	*/
157	static inline void eoi_write(__u64 v)	157	static inline void eoi_write(__u64 v)
158	{	158	{
159	__asm__ volatile ("mov cr.eoi = %0\n" : : "r" (v));	159	__asm__ volatile ("mov cr.eoi = %0\n" : : "r" (v));
160	}	160	}
161		161
162	/** Read TPR (Task Priority Register).	162	/** Read TPR (Task Priority Register).
163	*	163	*
164	* @return Current value of TPR.	164	* @return Current value of TPR.
165	*/	165	*/
166	static inline __u64 tpr_read(void)	166	static inline __u64 tpr_read(void)
167	{	167	{
168	__u64 v;	168	__u64 v;
169		169
170	__asm__ volatile ("mov %0 = cr.tpr\n" : "=r" (v));	170	__asm__ volatile ("mov %0 = cr.tpr\n" : "=r" (v));
171		171
172	return v;	172	return v;
173	}	173	}
174		174
175	/** Write TPR (Task Priority Register).	175	/** Write TPR (Task Priority Register).
176	*	176	*
177	* @param New value of TPR.	177	* @param New value of TPR.
178	*/	178	*/
179	static inline void tpr_write(__u64 v)	179	static inline void tpr_write(__u64 v)
180	{	180	{
181	__asm__ volatile ("mov cr.tpr = %0\n" : : "r" (v));	181	__asm__ volatile ("mov cr.tpr = %0\n" : : "r" (v));
182	}	182	}
183		183
184	/** Disable interrupts.	184	/** Disable interrupts.
185	*	185	*
186	* Disable interrupts and return previous	186	* Disable interrupts and return previous
187	* value of PSR.	187	* value of PSR.
188	*	188	*
189	* @return Old interrupt priority level.	189	* @return Old interrupt priority level.
190	*/	190	*/
191	static ipl_t interrupts_disable(void)	191	static ipl_t interrupts_disable(void)
192	{	192	{
193	__u64 v;	193	__u64 v;
194		194
195	__asm__ volatile (	195	__asm__ volatile (
196	"mov %0 = psr\n"	196	"mov %0 = psr\n"
197	"rsm %1\n"	197	"rsm %1\n"
198	: "=r" (v)	198	: "=r" (v)
199	: "i" (PSR_I_MASK)	199	: "i" (PSR_I_MASK)
200	);	200	);
201		201
202	return (ipl_t) v;	202	return (ipl_t) v;
203	}	203	}
204		204
205	/** Enable interrupts.	205	/** Enable interrupts.
206	*	206	*
207	* Enable interrupts and return previous	207	* Enable interrupts and return previous
208	* value of PSR.	208	* value of PSR.
209	*	209	*
210	* @return Old interrupt priority level.	210	* @return Old interrupt priority level.
211	*/	211	*/
212	static ipl_t interrupts_enable(void)	212	static ipl_t interrupts_enable(void)
213	{	213	{
214	__u64 v;	214	__u64 v;
215		215
216	__asm__ volatile (	216	__asm__ volatile (
217	"mov %0 = psr\n"	217	"mov %0 = psr\n"
218	"ssm %1\n"	218	"ssm %1\n"
219	";;\n"	219	";;\n"
220	"srlz.d\n"	220	"srlz.d\n"
221	: "=r" (v)	221	: "=r" (v)
222	: "i" (PSR_I_MASK)	222	: "i" (PSR_I_MASK)
223	);	223	);
224		224
225	return (ipl_t) v;	225	return (ipl_t) v;
226	}	226	}
227		227
228	/** Restore interrupt priority level.	228	/** Restore interrupt priority level.
229	*	229	*
230	* Restore PSR.	230	* Restore PSR.
231	*	231	*
232	* @param ipl Saved interrupt priority level.	232	* @param ipl Saved interrupt priority level.
233	*/	233	*/
234	static inline void interrupts_restore(ipl_t ipl)	234	static inline void interrupts_restore(ipl_t ipl)
235	{	235	{
236	if (ipl & PSR_I_MASK)	236	if (ipl & PSR_I_MASK)
237	(void) interrupts_enable();	237	(void) interrupts_enable();
238	else	238	else
239	(void) interrupts_disable();	239	(void) interrupts_disable();
240	}	240	}
241		241
242	/** Return interrupt priority level.	242	/** Return interrupt priority level.
243	*	243	*
244	* @return PSR.	244	* @return PSR.
245	*/	245	*/
246	static inline ipl_t interrupts_read(void)	246	static inline ipl_t interrupts_read(void)
247	{	247	{
248	return (ipl_t) psr_read();	248	return (ipl_t) psr_read();
249	}	249	}
250		250
251	/** Disable protection key checking. */	251	/** Disable protection key checking. */
252	static inline void pk_disable(void)	252	static inline void pk_disable(void)
253	{	253	{
254	__asm__ volatile ("rsm %0\n" : : "i" (PSR_PK_MASK));	254	__asm__ volatile ("rsm %0\n" : : "i" (PSR_PK_MASK));
255	}	255	}
256		256
257	extern void cpu_halt(void);	257	extern void cpu_halt(void);
258	extern void cpu_sleep(void);	258	extern void cpu_sleep(void);
259	extern void asm_delay_loop(__u32 t);	259	extern void asm_delay_loop(__u32 t);
260		260
261	extern void switch_to_userspace(__address entry, __address sp, __address bsp, __u64 ipsr, __u64 rsc);	261	extern void switch_to_userspace(__address entry, __address sp, __address bsp, __address uspace_uarg, __u64 ipsr, __u64 rsc);
262		262
263	#endif	263	#endif
264		264