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173 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2005 Martin Decky
173 jermar 3
 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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1888 jermar 29
/** @addtogroup ppc32  
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 * @{
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 */
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/** @file
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 */
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1888 jermar 35
#ifndef KERN_ppc32_ASM_H_
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#define KERN_ppc32_ASM_H_
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#include <arch/types.h>
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#include <typedefs.h>
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#include <config.h>
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413 jermar 42
/** Enable interrupts.
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 *
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 * Enable interrupts and return previous
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 * value of EE.
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 *
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 * @return Old interrupt priority level.
191 decky 48
 */
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static inline ipl_t interrupts_enable(void)
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{
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    ipl_t v;
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    ipl_t tmp;
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    asm volatile (
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        "mfmsr %0\n"
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        "mfmsr %1\n"
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        "ori %1, %1, 1 << 15\n"
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        "mtmsr %1\n"
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        : "=r" (v), "=r" (tmp)
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    );
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    return v;
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}
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413 jermar 64
/** Disable interrupts.
191 decky 65
 *
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 * Disable interrupts and return previous
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 * value of EE.
413 jermar 68
 *
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 * @return Old interrupt priority level.
191 decky 70
 */
1283 decky 71
static inline ipl_t interrupts_disable(void)
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{
413 jermar 73
    ipl_t v;
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    ipl_t tmp;
254 decky 75
 
1267 decky 76
    asm volatile (
204 decky 77
        "mfmsr %0\n"
254 decky 78
        "mfmsr %1\n"
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        "rlwinm %1, %1, 0, 17, 15\n"
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        "mtmsr %1\n"
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        : "=r" (v), "=r" (tmp)
191 decky 82
    );
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    return v;
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}
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413 jermar 86
/** Restore interrupt priority level.
191 decky 87
 *
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 * Restore EE.
413 jermar 89
 *
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 * @param ipl Saved interrupt priority level.
191 decky 91
 */
1283 decky 92
static inline void interrupts_restore(ipl_t ipl)
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{
413 jermar 94
    ipl_t tmp;
254 decky 95
 
1267 decky 96
    asm volatile (
254 decky 97
        "mfmsr %1\n"
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        "rlwimi  %0, %1, 0, 17, 15\n"
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        "cmpw 0, %0, %1\n"
210 decky 100
        "beq 0f\n"
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        "mtmsr %0\n"
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        "0:\n"
413 jermar 103
        : "=r" (ipl), "=r" (tmp)
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        : "0" (ipl)
1283 decky 105
        : "cr0"
191 decky 106
    );
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}
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413 jermar 109
/** Return interrupt priority level.
210 decky 110
 *
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 * Return EE.
413 jermar 112
 *
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 * @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"
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        : "=r" (v)
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    );
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    return v;
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}
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253 jermar 126
/** Return base address of current stack.
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 *
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 * Return the base address of the current stack.
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 * The stack is assumed to be STACK_SIZE bytes long.
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 * The stack must start on page boundary.
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 */
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 (
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        "and %0, %%sp, %1\n"
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        : "=r" (v)
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        : "r" (~(STACK_SIZE - 1))
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    );
253 jermar 141
    return v;
173 jermar 142
}
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1007 decky 144
static inline void cpu_sleep(void)
145
{
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}
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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
{
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    *port = v; 
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}
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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
}
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173 jermar 183
#endif
1702 cejka 184
 
1888 jermar 185
/** @}
1702 cejka 186
 */