1 | /* |
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2 | * This include file definitions related to an Intel i386ex board. |
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3 | * |
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4 | * COPYRIGHT (c) 1989-1999. |
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5 | * On-Line Applications Research Corporation (OAR). |
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6 | * |
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7 | * The license and distribution terms for this file may be |
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8 | * found in the file LICENSE in this distribution or at |
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9 | * http://www.rtems.com/license/LICENSE. |
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10 | * |
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11 | * $Id$ |
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12 | */ |
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13 | |
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14 | #ifndef _BSP_H |
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15 | #define _BSP_H |
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16 | |
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17 | #ifdef __cplusplus |
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18 | extern "C" { |
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19 | #endif |
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20 | |
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21 | #include <bspopts.h> |
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22 | |
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23 | #include <rtems.h> |
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24 | #include <rtems/iosupp.h> |
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25 | #include <rtems/console.h> |
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26 | #include <rtems/clockdrv.h> |
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27 | #include <rtems/bspIo.h> |
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28 | #include <libcpu/cpu.h> |
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29 | #include <bsp/irq.h> |
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30 | |
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31 | /* |
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32 | * confdefs.h overrides for this BSP: |
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33 | * - number of termios serial ports (defaults to 1) |
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34 | * - Interrupt stack space is not minimum if defined. |
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35 | */ |
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36 | |
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37 | /* #define CONFIGURE_NUMBER_OF_TERMIOS_PORTS 2 */ |
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38 | #define CONFIGURE_INTERRUPT_STACK_MEMORY (8 * 1024) |
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39 | |
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40 | /* |
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41 | * Simple spin delay in microsecond units for device drivers. |
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42 | * This is very dependent on the clock speed of the target. |
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43 | */ |
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44 | |
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45 | #define rtems_bsp_delay( _microseconds ) \ |
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46 | { \ |
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47 | uint32_t _counter; \ |
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48 | \ |
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49 | _counter = (_microseconds); \ |
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50 | \ |
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51 | asm volatile ( "0: nop;" \ |
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52 | " mov %0,%0 ;" \ |
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53 | " loop 0b" : "=c" (_counter) \ |
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54 | : "0" (_counter) \ |
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55 | ); \ |
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56 | \ |
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57 | } |
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58 | |
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59 | /* Constants */ |
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60 | |
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61 | #define RAM_START 0 |
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62 | |
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63 | /* replaced the earlier EI kludge of 0xfffff */ |
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64 | |
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65 | #define RAM_END 0x100000 |
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66 | |
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67 | /* I/O addressing */ |
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68 | |
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69 | /* |
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70 | *#define Is_tx_ready( _status ) ( (_status) & 0x20 ) |
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71 | */ |
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72 | /* dec 20. try the TE instead of TBE as the check */ |
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73 | |
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74 | #define Is_tx_ready( _status ) ( (_status) & 0x40 ) |
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75 | |
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76 | #define Is_rx_ready( _status ) ( (_status) & 0x01 ) |
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77 | |
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78 | /* Structures */ |
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79 | |
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80 | #ifdef F386_INIT |
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81 | #undef BSP_EXTERN |
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82 | #define BSP_EXTERN |
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83 | #else |
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84 | #undef BSP_EXTERN |
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85 | #define BSP_EXTERN extern |
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86 | #endif |
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87 | |
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88 | /* |
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89 | * Device Driver Table Entries |
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90 | */ |
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91 | |
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92 | /* |
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93 | * NOTE: Use the standard Console driver entry |
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94 | */ |
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95 | |
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96 | /* |
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97 | * NOTE: Use the standard Clock driver entry |
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98 | */ |
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99 | |
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100 | /* miscellaneous stuff assumed to exist */ |
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101 | |
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102 | extern rtems_configuration_table BSP_Configuration; |
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103 | |
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104 | #define IDT_SIZE 256 |
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105 | #define GDT_SIZE 8192 |
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106 | |
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107 | extern interrupt_gate_descriptor Interrupt_descriptor_table[IDT_SIZE]; |
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108 | extern segment_descriptors Global_descriptor_table [GDT_SIZE]; |
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109 | |
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110 | BSP_EXTERN unsigned short Idt[3]; /* Interrupt Descriptor Table Address */ |
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111 | BSP_EXTERN unsigned short Gdt[3]; /* Global Descriptor Table Address */ |
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112 | BSP_EXTERN unsigned int Idt_base; |
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113 | BSP_EXTERN unsigned int Gdt_base; |
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114 | |
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115 | /* routines */ |
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116 | |
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117 | #ifdef __cplusplus |
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118 | } |
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119 | #endif |
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120 | |
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121 | #endif |
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122 | /* end of include file */ |
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