1 | /** |
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2 | * @file |
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3 | * @ingroup i386_io |
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4 | * @brief I/O |
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5 | */ |
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6 | |
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7 | /* |
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8 | * Copyright (c) 2000 - Rosimildo da Silva. All Rights Reserved. |
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9 | * |
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10 | * MODULE DESCRIPTION: |
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11 | * |
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12 | * IO Functions for the PC platform equivalent to DOS/Linux. They make |
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13 | * eaiser the porting of code from these platforms. |
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14 | * |
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15 | * by: Rosimildo da Silva: rdasilva@connecttel.com |
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16 | * |
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17 | */ |
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18 | |
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19 | /** |
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20 | * @defgroup i386_io I/O |
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21 | * @ingroup i386_comm |
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22 | * @brief I/O |
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23 | * @{ |
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24 | */ |
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25 | |
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26 | #ifndef i386_io_h__ |
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27 | #define i386_io_h__ |
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28 | |
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29 | #define rtems_inb(port) \ |
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30 | ({ \ |
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31 | register int _inb_result; \ |
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32 | \ |
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33 | __asm__ volatile ("xorl %%eax,%%eax; inb %%dx,%%al" : \ |
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34 | "=a" (_inb_result) : "d" (port)); \ |
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35 | _inb_result; \ |
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36 | }) |
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37 | |
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38 | #define rtems_inw(port) \ |
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39 | ({ \ |
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40 | register int _inbw_result; \ |
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41 | \ |
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42 | __asm__ volatile ("xorl %%eax,%%eax; inw %%dx,%%ax" : \ |
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43 | "=a" (_inbw_result) : "d" (port)); \ |
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44 | _inbw_result; \ |
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45 | }) |
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46 | |
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47 | #define rtems_outb(port, data) \ |
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48 | __asm__ volatile ("outb %%al,%%dx" : : "a" (data), "d" (port)) |
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49 | |
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50 | #define rtems_outw(port, data) \ |
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51 | __asm__ volatile ("outw %%ax,%%dx" : : "a" (data), "d" (port)) |
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52 | |
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53 | #define outp(port, val) rtems_outb(port,val) |
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54 | #define inp(port) rtems_inb(port) |
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55 | |
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56 | #define outb(val, port) rtems_outb(port,val) |
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57 | #define inb(port) rtems_inb(port) |
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58 | |
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59 | #define outb_p(val, port) rtems_outb(port,val) |
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60 | #define inb_p(port) rtems_inb(port) |
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61 | |
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62 | #define outportb(port,val) rtems_outb(port,val) |
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63 | #define inportb(port) rtems_inb(port) |
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64 | |
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65 | #define outw(val, port) rtems_outw(port,val) |
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66 | #define inw(port) rtems_inw(port) |
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67 | |
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68 | #define cli() __asm__ __volatile__("cli") |
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69 | #define sti() __asm__ __volatile__("sti"); |
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70 | |
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71 | #endif /* i386_io_h__ */ |
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72 | |
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73 | /** @} */ |
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