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  1. /*
  2.  * Copyright (c) 2003-2004 Jakub 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.  
  29. /** @addtogroup mips32 
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #ifndef KERN_mips32_ASM_H_
  36. #define KERN_mips32_ASM_H_
  37.  
  38. #include <arch/types.h>
  39. #include <typedefs.h>
  40. #include <config.h>
  41.  
  42.  
  43. static inline void cpu_sleep(void)
  44. {
  45.     /* Most of the simulators do not support */
  46. /*  asm volatile ("wait"); */
  47. }
  48.  
  49. /** Return base address of current stack
  50.  *
  51.  * Return the base address of the current stack.
  52.  * The stack is assumed to be STACK_SIZE bytes long.
  53.  * The stack must start on page boundary.
  54.  */
  55. static inline uintptr_t get_stack_base(void)
  56. {
  57.     uintptr_t v;
  58.    
  59.     asm volatile (
  60.         "and %0, $29, %1\n"
  61.         : "=r" (v)
  62.         : "r" (~(STACK_SIZE-1))
  63.     );
  64.    
  65.     return v;
  66. }
  67.  
  68. extern void cpu_halt(void);
  69. extern void asm_delay_loop(uint32_t t);
  70. extern void userspace_asm(uintptr_t ustack, uintptr_t uspace_uarg,
  71.     uintptr_t entry);
  72.  
  73. extern ipl_t interrupts_disable(void);
  74. extern ipl_t interrupts_enable(void);
  75. extern void interrupts_restore(ipl_t ipl);
  76. extern ipl_t interrupts_read(void);
  77. extern void asm_delay_loop(uint32_t t);
  78.  
  79. static inline void pio_write_8(ioport8_t *port, uint8_t v)
  80. {
  81.     *port = v; 
  82. }
  83.  
  84. static inline void pio_write_16(ioport16_t *port, uint16_t v)
  85. {
  86.     *port = v; 
  87. }
  88.  
  89. static inline void pio_write_32(ioport32_t *port, uint32_t v)
  90. {
  91.     *port = v; 
  92. }
  93.  
  94. static inline uint8_t pio_read_8(ioport8_t *port)
  95. {
  96.     return *port;
  97. }
  98.  
  99. static inline uint16_t pio_read_16(ioport16_t *port)
  100. {
  101.     return *port;
  102. }
  103.  
  104. static inline uint32_t pio_read_32(ioport32_t *port)
  105. {
  106.     return *port;
  107. }
  108.  
  109. #endif
  110.  
  111. /** @}
  112.  */
  113.