| 1 | /*
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| 2 | * Copyright (c) 2003-2004 Jakub Jermar
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup mips32
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | */
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| 34 |
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| 35 | #ifndef KERN_mips32_ASM_H_
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| 36 | #define KERN_mips32_ASM_H_
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| 37 |
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| 38 | #include <typedefs.h>
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| 39 | #include <config.h>
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| 40 | #include <trace.h>
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| 41 |
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| 42 | NO_TRACE static inline void cpu_sleep(void)
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| 43 | {
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| 44 | /*
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| 45 | * Unfortunatelly most of the simulators do not support
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| 46 | *
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| 47 | * asm volatile (
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| 48 | * "wait"
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| 49 | * );
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| 50 | *
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| 51 | */
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| 52 | }
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| 53 |
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| 54 | /** Return base address of current stack
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| 55 | *
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| 56 | * Return the base address of the current stack.
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| 57 | * The stack is assumed to be STACK_SIZE bytes long.
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| 58 | * The stack must start on page boundary.
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| 59 | *
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| 60 | */
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| 61 | NO_TRACE static inline uintptr_t get_stack_base(void)
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| 62 | {
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| 63 | uintptr_t base;
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| 64 |
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| 65 | asm volatile (
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| 66 | "and %[base], $29, %[mask]\n"
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| 67 | : [base] "=r" (base)
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| 68 | : [mask] "r" (~(STACK_SIZE - 1))
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| 69 | );
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| 70 |
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| 71 | return base;
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| 72 | }
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| 73 |
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| 74 | NO_TRACE static inline void pio_write_8(ioport8_t *port, uint8_t v)
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| 75 | {
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| 76 | *port = v;
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| 77 | }
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| 78 |
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| 79 | NO_TRACE static inline void pio_write_16(ioport16_t *port, uint16_t v)
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| 80 | {
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| 81 | *port = v;
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| 82 | }
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| 83 |
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| 84 | NO_TRACE static inline void pio_write_32(ioport32_t *port, uint32_t v)
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| 85 | {
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| 86 | *port = v;
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| 87 | }
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| 88 |
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| 89 | NO_TRACE static inline uint8_t pio_read_8(ioport8_t *port)
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| 90 | {
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| 91 | return *port;
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| 92 | }
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| 93 |
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| 94 | NO_TRACE static inline uint16_t pio_read_16(ioport16_t *port)
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| 95 | {
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| 96 | return *port;
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| 97 | }
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| 98 |
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| 99 | NO_TRACE static inline uint32_t pio_read_32(ioport32_t *port)
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| 100 | {
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| 101 | return *port;
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| 102 | }
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| 103 |
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| 104 | extern void cpu_halt(void) __attribute__((noreturn));
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| 105 | extern void asm_delay_loop(uint32_t);
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| 106 | extern void userspace_asm(uintptr_t, uintptr_t, uintptr_t);
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| 107 |
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| 108 | extern ipl_t interrupts_disable(void);
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| 109 | extern ipl_t interrupts_enable(void);
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| 110 | extern void interrupts_restore(ipl_t);
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| 111 | extern ipl_t interrupts_read(void);
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| 112 | extern bool interrupts_disabled(void);
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| 113 |
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| 114 | #endif
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| 115 |
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| 116 | /** @}
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| 117 | */
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