WebSVN – HelenOS – Diff – /trunk/kernel/arch/amd64/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 __amd64_ASM_H__
#define __amd64_ASM_H__
 
#include <arch/types.h>
#include <config.h>
 
 
void asm_delay_loop(__u32 t);
void asm_fake_loop(__u32 t);
 
 
static inline __address get_stack_base(void)
{
    __address v;
   
    __asm__ volatile ("andq %%rsp, %0\n" : "=r" (v) : "0" (~((__u64)STACK_SIZE-1)));
   
    return v;
}
 
static inline void cpu_sleep(void) { __asm__("hlt"); };
static inline void cpu_halt(void) { __asm__("hlt"); };
 
 
static inline __u8 inb(__u16 port)
{
    __u8 out;
 
    asm (
        "mov %1, %%dx;"
        "inb %%dx,%%al;"
        "mov %%al, %0;"
        :"=m"(out)
        :"m"(port)
        :"%dx","%al"
        );
    return out;
}
 
static inline __u8 outb(__u16 port,__u8 b)
{
    asm (
        "mov %0,%%dx;"
        "mov %1,%%al;"
        "outb %%al,%%dx;"
        :
        :"m"( port), "m" (b)
        :"%dx","%al"
        );
}
 
/** Set priority level low
 *
 * Enable interrupts and return previous
 * value of EFLAGS.
 */
static inline pri_t cpu_priority_low(void) {
    pri_t v;
    __asm__ volatile (
        "pushfq\n"
        "popq %0\n"
        "sti\n"
        : "=r" (v)
    );
    return v;
}
 
/** Set priority level high
 *
 * Disable interrupts and return previous
 * value of EFLAGS.
 */
static inline pri_t cpu_priority_high(void) {
    pri_t v;
    __asm__ volatile (
        "pushfq\n"
        "popq %0\n"
        "cli\n"
        : "=r" (v)
        );
    return v;
}
 
/** Restore priority level
 *
 * Restore EFLAGS.
 */
static inline void cpu_priority_restore(pri_t pri) {
    __asm__ volatile (
        "pushq %0\n"
        "popfq\n"
        : : "r" (pri)
        );
}
 
/** Return raw priority level
 *
 * Return EFLAFS.
 */
static inline pri_t cpu_priority_read(void) {
    pri_t v;
    __asm__ volatile (
        "pushfq\n"
        "popq %0\n"
        : "=r" (v)
    );
    return v;
}
 
/** Read CR2
 *
 * Return value in CR2
 *
 * @return Value read.
 */
static inline __u64 read_cr2(void) { __u64 v; __asm__ volatile ("movq %%cr2,%0" : "=r" (v)); return v; }
 
/** Write CR3
 *
 * Write value to CR3.
 *
 * @param v Value to be written.
 */
static inline void write_cr3(__u64 v) { __asm__ volatile ("movq %0,%%cr3\n" : : "r" (v)); }
 
/** Read CR3
 *
 * Return value in CR3
 *
 * @return Value read.
 */
static inline __u64 read_cr3(void) { __u64 v; __asm__ volatile ("movq %%cr3,%0" : "=r" (v)); return v; }
 
 
extern size_t interrupt_handler_size;
extern void interrupt_handlers(void);
 
#endif
 

Rev 224	Rev 226
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 __amd64_ASM_H__	29	#ifndef __amd64_ASM_H__
30	#define __amd64_ASM_H__	30	#define __amd64_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		35
36	void asm_delay_loop(__u32 t);	36	void asm_delay_loop(__u32 t);
37	void asm_fake_loop(__u32 t);	37	void asm_fake_loop(__u32 t);
38		38
39	/* TODO: implement the real stuff */	-
40	static inline __address get_stack_base(void)	39	static inline __address get_stack_base(void)
41	{	40	{
-		41	__address v;
-		42
-		43	__asm__ volatile ("andq %%rsp, %0\n" : "=r" (v) : "0" (~((__u64)STACK_SIZE-1)));
-		44
42	return NULL;	45	return v;
43	}	46	}
44		47
45	static inline void cpu_sleep(void) { __asm__("hlt"); };	48	static inline void cpu_sleep(void) { __asm__("hlt"); };
46	static inline void cpu_halt(void) { __asm__("hlt"); };	49	static inline void cpu_halt(void) { __asm__("hlt"); };
47		50
48		51
49	static inline __u8 inb(__u16 port)	52	static inline __u8 inb(__u16 port)
50	{	53	{
51	__u8 out;	54	__u8 out;
52		55
53	asm (	56	asm (
54	"mov %0, %%dx;"	57	"mov %1, %%dx;"
55	"inb %%dx,%%al;"	58	"inb %%dx,%%al;"
56	"mov %%al, %1;"	59	"mov %%al, %0;"
57	:"=m"(out)	60	:"=m"(out)
58	:"m"(port)	61	:"m"(port)
59	:"%dx","%al"	62	:"%dx","%al"
60	);	63	);
61	return out;	64	return out;
62	}	65	}
63		66
64	static inline __u8 outb(__u16 port,__u8 b)	67	static inline __u8 outb(__u16 port,__u8 b)
65	{	68	{
66	asm (	69	asm (
67	"mov %0,%%dx;"	70	"mov %0,%%dx;"
68	"mov %1,%%al;"	71	"mov %1,%%al;"
69	"outb %%al,%%dx;"	72	"outb %%al,%%dx;"
70	:	73	:
71	:"m"( port), "m" (b)	74	:"m"( port), "m" (b)
72	:"%dx","%al"	75	:"%dx","%al"
73	);	76	);
74	}	77	}
75		78
76	/** Set priority level low	79	/** Set priority level low
77	*	80	*
78	* Enable interrupts and return previous	81	* Enable interrupts and return previous
79	* value of EFLAGS.	82	* value of EFLAGS.
80	*/	83	*/
81	static inline pri_t cpu_priority_low(void) {	84	static inline pri_t cpu_priority_low(void) {
82	pri_t v;	85	pri_t v;
83	__asm__ volatile (	86	__asm__ volatile (
84	"pushfq\n"	87	"pushfq\n"
85	"popq %0\n"	88	"popq %0\n"
86	"sti\n"	89	"sti\n"
87	: "=r" (v)	90	: "=r" (v)
88	);	91	);
89	return v;	92	return v;
90	}	93	}
91		94
92	/** Set priority level high	95	/** Set priority level high
93	*	96	*
94	* Disable interrupts and return previous	97	* Disable interrupts and return previous
95	* value of EFLAGS.	98	* value of EFLAGS.
96	*/	99	*/
97	static inline pri_t cpu_priority_high(void) {	100	static inline pri_t cpu_priority_high(void) {
98	pri_t v;	101	pri_t v;
99	__asm__ volatile (	102	__asm__ volatile (
100	"pushfq\n"	103	"pushfq\n"
101	"popq %0\n"	104	"popq %0\n"
102	"cli\n"	105	"cli\n"
103	: "=r" (v)	106	: "=r" (v)
104	);	107	);
105	return v;	108	return v;
106	}	109	}
107		110
108	/** Restore priority level	111	/** Restore priority level
109	*	112	*
110	* Restore EFLAGS.	113	* Restore EFLAGS.
111	*/	114	*/
112	static inline void cpu_priority_restore(pri_t pri) {	115	static inline void cpu_priority_restore(pri_t pri) {
113	__asm__ volatile (	116	__asm__ volatile (
114	"pushq %0\n"	117	"pushq %0\n"
115	"popfq\n"	118	"popfq\n"
116	: : "r" (pri)	119	: : "r" (pri)
117	);	120	);
118	}	121	}
119		122
120	/** Return raw priority level	123	/** Return raw priority level
121	*	124	*
122	* Return EFLAFS.	125	* Return EFLAFS.
123	*/	126	*/
124	static inline pri_t cpu_priority_read(void) {	127	static inline pri_t cpu_priority_read(void) {
125	pri_t v;	128	pri_t v;
126	__asm__ volatile (	129	__asm__ volatile (
127	"pushfq\n"	130	"pushfq\n"
128	"popq %0\n"	131	"popq %0\n"
129	: "=r" (v)	132	: "=r" (v)
130	);	133	);
131	return v;	134	return v;
132	}	135	}
133		136
134	/** Read CR2	137	/** Read CR2
135	*	138	*
136	* Return value in CR2	139	* Return value in CR2
137	*	140	*
138	* @return Value read.	141	* @return Value read.
139	*/	142	*/
140	static inline __u64 read_cr2(void) { __u64 v; __asm__ volatile ("movq %%cr2,%0" : "=r" (v)); return v; }	143	static inline __u64 read_cr2(void) { __u64 v; __asm__ volatile ("movq %%cr2,%0" : "=r" (v)); return v; }
141		144
142	/** Write CR3	145	/** Write CR3
143	*	146	*
144	* Write value to CR3.	147	* Write value to CR3.
145	*	148	*
146	* @param v Value to be written.	149	* @param v Value to be written.
147	*/	150	*/
148	static inline void write_cr3(__u64 v) { __asm__ volatile ("movq %0,%%cr3\n" : : "r" (v)); }	151	static inline void write_cr3(__u64 v) { __asm__ volatile ("movq %0,%%cr3\n" : : "r" (v)); }
149		152
150	/** Read CR3	153	/** Read CR3
151	*	154	*
152	* Return value in CR3	155	* Return value in CR3
153	*	156	*
154	* @return Value read.	157	* @return Value read.
155	*/	158	*/
156	static inline __u64 read_cr3(void) { __u64 v; __asm__ volatile ("movq %%cr3,%0" : "=r" (v)); return v; }	159	static inline __u64 read_cr3(void) { __u64 v; __asm__ volatile ("movq %%cr3,%0" : "=r" (v)); return v; }
157		160
158		161
159	extern size_t interrupt_handler_size;	162	extern size_t interrupt_handler_size;
160	extern void interrupt_handlers(void);	163	extern void interrupt_handlers(void);
161		164
162	#endif	165	#endif
163		166

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