Subversion Repositories HelenOS

Rev

Rev 3956 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
173 jermar 1 
/*
2071 jermar 2 
 * Copyright (c) 2005 Martin Decky
173 jermar 3 
 * All rights reserved.
4 
 *
5 
 * Redistribution and use in source and binary forms, with or without
6 
 * modification, are permitted provided that the following conditions
7 
 * are met:
8 
 *
9 
 * - Redistributions of source code must retain the above copyright
10 
 *   notice, this list of conditions and the following disclaimer.
11 
 * - Redistributions in binary form must reproduce the above copyright
12 
 *   notice, this list of conditions and the following disclaimer in the
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
15 
 *   derived from this software without specific prior written permission.
16 
 *
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
19 
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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
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
26 
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 
 */
28 
 
1888 jermar 29 
/** @addtogroup ppc32  
1702 cejka 30 
 * @{
31 
 */
32 
/** @file
33 
 */
34 
 
1888 jermar 35 
#ifndef KERN_ppc32_ASM_H_
36 
#define KERN_ppc32_ASM_H_
173 jermar 37 
 
38 
#include <arch/types.h>
4021 jermar 39 
#include <typedefs.h>
173 jermar 40 
#include <config.h>
41 
 
413 jermar 42 
/** Enable interrupts.
191 decky 43 
 *
44 
 * Enable interrupts and return previous
45 
 * value of EE.
413 jermar 46 
 *
47 
 * @return Old interrupt priority level.
191 decky 48 
 */
1283 decky 49 
static inline ipl_t interrupts_enable(void)
50 
{
1268 decky 51 
    ipl_t v;
413 jermar 52 
    ipl_t tmp;
254 decky 53 
 
1267 decky 54 
    asm volatile (
204 decky 55 
        "mfmsr %0\n"
254 decky 56 
        "mfmsr %1\n"
987 decky 57 
        "ori %1, %1, 1 << 15\n"
254 decky 58 
        "mtmsr %1\n"
59 
        : "=r" (v), "=r" (tmp)
191 decky 60 
    );
61 
    return v;
62 
}
63 
 
413 jermar 64 
/** Disable interrupts.
191 decky 65 
 *
66 
 * Disable interrupts and return previous
67 
 * value of EE.
413 jermar 68 
 *
69 
 * @return Old interrupt priority level.
191 decky 70 
 */
1283 decky 71 
static inline ipl_t interrupts_disable(void)
72 
{
413 jermar 73 
    ipl_t v;
74 
    ipl_t tmp;
254 decky 75 
 
1267 decky 76 
    asm volatile (
204 decky 77 
        "mfmsr %0\n"
254 decky 78 
        "mfmsr %1\n"
79 
        "rlwinm %1, %1, 0, 17, 15\n"
80 
        "mtmsr %1\n"
81 
        : "=r" (v), "=r" (tmp)
191 decky 82 
    );
83 
    return v;
84 
}
85 
 
413 jermar 86 
/** Restore interrupt priority level.
191 decky 87 
 *
88 
 * Restore EE.
413 jermar 89 
 *
90 
 * @param ipl Saved interrupt priority level.
191 decky 91 
 */
1283 decky 92 
static inline void interrupts_restore(ipl_t ipl)
93 
{
413 jermar 94 
    ipl_t tmp;
254 decky 95 
 
1267 decky 96 
    asm volatile (
254 decky 97 
        "mfmsr %1\n"
98 
        "rlwimi  %0, %1, 0, 17, 15\n"
99 
        "cmpw 0, %0, %1\n"
210 decky 100 
        "beq 0f\n"
204 decky 101 
        "mtmsr %0\n"
210 decky 102 
        "0:\n"
413 jermar 103 
        : "=r" (ipl), "=r" (tmp)
104 
        : "0" (ipl)
1283 decky 105 
        : "cr0"
191 decky 106 
    );
107 
}
108 
 
413 jermar 109 
/** Return interrupt priority level.
210 decky 110 
 *
111 
 * Return EE.
413 jermar 112 
 *
113 
 * @return Current interrupt priority level.
210 decky 114 
 */
1283 decky 115 
static inline ipl_t interrupts_read(void)
116 
{
413 jermar 117 
    ipl_t v;
1267 decky 118 
 
119 
    asm volatile (
210 decky 120 
        "mfmsr %0\n"
121 
        : "=r" (v)
122 
    );
123 
    return v;
124 
}
125 
 
253 jermar 126 
/** Return base address of current stack.
127 
 *
128 
 * Return the base address of the current stack.
129 
 * The stack is assumed to be STACK_SIZE bytes long.
130 
 * The stack must start on page boundary.
131 
 */
1780 jermar 132 
static inline uintptr_t get_stack_base(void)
173 jermar 133 
{
1780 jermar 134 
    uintptr_t v;
253 jermar 135 
 
1267 decky 136 
    asm volatile (
137 
        "and %0, %%sp, %1\n"
138 
        : "=r" (v)
139 
        : "r" (~(STACK_SIZE - 1))
140 
    );
253 jermar 141 
    return v;
173 jermar 142 
}
143 
 
1007 decky 144 
static inline void cpu_sleep(void)
145 
{
146 
}
147 
 
254 decky 148 
void cpu_halt(void);
1780 jermar 149 
void asm_delay_loop(uint32_t t);
201 decky 150 
 
1780 jermar 151 
extern void userspace_asm(uintptr_t uspace_uarg, uintptr_t stack, uintptr_t entry);
1220 decky 152 
 
3929 jermar 153 
static inline void pio_write_8(ioport8_t *port, uint8_t v)
3880 decky 154 
{
3956 jermar 155 
    *port = v; 
3880 decky 156 
}
157 
 
3956 jermar 158 
static inline void pio_write_16(ioport16_t *port, uint16_t v)
159 
{
160 
    *port = v; 
161 
}
162 
 
163 
static inline void pio_write_32(ioport32_t *port, uint32_t v)
164 
{
165 
    *port = v; 
166 
}
167 
 
3929 jermar 168 
static inline uint8_t pio_read_8(ioport8_t *port)
3880 decky 169 
{
3956 jermar 170 
    return *port;
3880 decky 171 
}
172 
 
3956 jermar 173 
static inline uint16_t pio_read_16(ioport16_t *port)
174 
{
175 
    return *port;
176 
}
177 
 
178 
static inline uint32_t pio_read_32(ioport32_t *port)
179 
{
180 
    return *port;
181 
}
182 
 
173 jermar 183 
#endif
1702 cejka 184 
 
1888 jermar 185 
/** @}
1702 cejka 186 
 */