1 | /* |
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2 | * MC68360 buffer descriptor allocation routines |
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3 | * |
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4 | * W. Eric Norum |
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5 | * Saskatchewan Accelerator Laboratory |
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6 | * University of Saskatchewan |
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7 | * Saskatoon, Saskatchewan, CANADA |
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8 | * eric@skatter.usask.ca |
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9 | * |
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10 | * COPYRIGHT (c) 2008. |
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11 | * On-Line Applications Research Corporation (OAR). |
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12 | * |
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13 | * The license and distribution terms for this file may be |
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14 | * found in the file LICENSE in this distribution or at |
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15 | * http://www.rtems.com/license/LICENSE. |
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16 | * |
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17 | * $Id$ |
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18 | */ |
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19 | |
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20 | #include <rtems.h> |
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21 | #include <bsp.h> |
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22 | #include "m68360.h" |
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23 | #include <rtems/error.h> |
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24 | #include "rsPMCQ1.h" |
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25 | #include <rtems/bspIo.h> |
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26 | |
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27 | |
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28 | #define DEBUG_PRINT 1 |
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29 | |
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30 | void M360SetupMemory( M68360_t ptr ){ |
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31 | volatile m360_t *m360; |
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32 | |
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33 | m360 = ptr->m360; |
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34 | |
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35 | #if DEBUG_PRINT |
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36 | printk("m360->mcr:0x%08x Q1_360_SIM_MCR:0x%08x\n", |
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37 | (uint32_t)&(m360->mcr), ((uint32_t)m360+Q1_360_SIM_MCR)); |
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38 | #endif |
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39 | ptr->bdregions[0].base = (uint8_t *)&m360->dpram1[0]; |
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40 | ptr->bdregions[0].size = sizeof m360->dpram1; |
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41 | ptr->bdregions[0].used = 0; |
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42 | #if DEBUG_PRINT |
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43 | printk("%d) base 0x%x size %d used %d\n", 0, |
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44 | (uint32_t)ptr->bdregions[0].base, ptr->bdregions[0].size, ptr->bdregions[0].used ); |
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45 | #endif |
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46 | |
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47 | ptr->bdregions[1].base = (uint8_t *)&m360->dpram3[0]; |
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48 | ptr->bdregions[1].size = sizeof m360->dpram3; |
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49 | ptr->bdregions[1].used = 0; |
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50 | #if DEBUG_PRINT |
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51 | printk("%d) base 0x%x size %d used %d\n", 1, |
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52 | (uint32_t)ptr->bdregions[1].base, ptr->bdregions[1].size, ptr->bdregions[1].used ); |
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53 | #endif |
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54 | |
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55 | ptr->bdregions[2].base = (uint8_t *)&m360->dpram0[0]; |
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56 | ptr->bdregions[2].size = sizeof m360->dpram0; |
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57 | ptr->bdregions[2].used = 0; |
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58 | #if DEBUG_PRINT |
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59 | printk("%d) base 0x%x size %d used %d\n", 2, |
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60 | (uint32_t)ptr->bdregions[2].base, ptr->bdregions[2].size, ptr->bdregions[2].used ); |
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61 | #endif |
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62 | |
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63 | ptr->bdregions[3].base = (uint8_t *)&m360->dpram2[0]; |
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64 | ptr->bdregions[3].size = sizeof m360->dpram2; |
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65 | ptr->bdregions[3].used = 0; |
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66 | #if DEBUG_PRINT |
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67 | printk("%d) base 0x%x size %d used %d\n", 3, |
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68 | (uint32_t)ptr->bdregions[3].base, ptr->bdregions[3].size, ptr->bdregions[3].used ); |
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69 | #endif |
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70 | |
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71 | } |
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72 | |
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73 | |
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74 | /* |
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75 | * Send a command to the CPM RISC processer |
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76 | */ |
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77 | void * |
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78 | M360AllocateBufferDescriptors (M68360_t ptr, int count) |
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79 | { |
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80 | uint32_t i; |
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81 | ISR_Level level; |
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82 | void *bdp = NULL; |
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83 | uint32_t want = count * sizeof(m360BufferDescriptor_t); |
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84 | uint32_t have; |
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85 | |
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86 | /* |
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87 | * Running with interrupts disabled is usually considered bad |
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88 | * form, but this routine is probably being run as part of an |
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89 | * initialization sequence so the effect shouldn't be too severe. |
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90 | */ |
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91 | _ISR_Disable (level); |
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92 | |
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93 | for (i = 0 ; i < M360_NUM_DPRAM_REAGONS ; i++) { |
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94 | |
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95 | /* |
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96 | * Verify that the region exists. |
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97 | * This test is necessary since some chips have |
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98 | * less dual-port RAM. |
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99 | */ |
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100 | if (ptr->bdregions[i].used == 0) { |
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101 | volatile uint8_t *cp = ptr->bdregions[i].base; |
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102 | uint8_t data; |
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103 | |
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104 | *cp = 0xAA; |
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105 | data = *cp; |
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106 | if (data != 0xAA) { |
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107 | ptr->bdregions[i].used = ptr->bdregions[i].size; |
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108 | #if DEBUG_PRINT |
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109 | printk("%d) base 0x%x used %d expected 0xAA read 0x%x\n",i, |
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110 | (uint32_t)ptr->bdregions[i].base, ptr->bdregions[0].used, data ); |
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111 | #endif |
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112 | continue; |
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113 | } |
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114 | *cp = 0x55; |
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115 | data = *cp; |
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116 | if (data != 0x55) { |
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117 | ptr->bdregions[i].used = ptr->bdregions[i].size; |
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118 | #if DEBUG_PRINT |
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119 | printk("%d) base 0x%x used %d expected 0x55 read 0x%x\n",i, |
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120 | (uint32_t)ptr->bdregions[i].base, ptr->bdregions[0].used, data ); |
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121 | #endif |
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122 | continue; |
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123 | } |
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124 | *cp = 0x0; |
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125 | } |
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126 | |
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127 | have = ptr->bdregions[i].size - ptr->bdregions[i].used; |
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128 | if (have >= want) { |
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129 | bdp = ptr->bdregions[i].base + ptr->bdregions[i].used; |
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130 | ptr->bdregions[i].used += want; |
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131 | break; |
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132 | } |
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133 | } |
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134 | _ISR_Enable (level); |
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135 | if (bdp == NULL){ |
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136 | printk("rtems_panic can't allocate %d buffer descriptor(s).\n"); |
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137 | rtems_panic ("Can't allocate %d buffer descriptor(s).\n", count); |
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138 | } |
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139 | return bdp; |
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140 | } |
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