4.104.114.84.95
Last change
on this file since acddd7d2 was
acc25ee,
checked in by Joel Sherrill <joel.sherrill@…>, on 12/02/99 at 14:31:19
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Merged of mcp750 and mvme2307 BSP by Eric Valette <valette@…>.
As part of this effort, the mpc750 libcpu code is now shared with the
ppc6xx.
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-
Property mode set to
100644
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File size:
992 bytes
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Line | |
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1 | /* |
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2 | * PowerPC Cache enable routines |
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3 | * |
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4 | * $Id$ |
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5 | */ |
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6 | |
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7 | #include <rtems/system.h> |
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8 | |
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9 | #define PPC_Get_HID0( _value ) \ |
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10 | do { \ |
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11 | _value = 0; /* to avoid warnings */ \ |
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12 | asm volatile( \ |
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13 | "mfspr %0, 0x3f0;" /* get HID0 */ \ |
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14 | "isync" \ |
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15 | : "=r" (_value) \ |
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16 | : "0" (_value) \ |
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17 | ); \ |
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18 | } while (0) |
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19 | |
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20 | #define PPC_Set_HID0( _value ) \ |
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21 | do { \ |
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22 | asm volatile( \ |
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23 | "isync;" \ |
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24 | "mtspr 0x3f0, %0;" /* load HID0 */ \ |
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25 | "isync" \ |
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26 | : "=r" (_value) \ |
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27 | : "0" (_value) \ |
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28 | ); \ |
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29 | } while (0) |
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30 | |
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31 | |
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32 | void powerpc_instruction_cache_enable () |
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33 | { |
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34 | unsigned32 value; |
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35 | |
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36 | /* |
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37 | * Enable the instruction cache |
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38 | */ |
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39 | |
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40 | PPC_Get_HID0( value ); |
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41 | |
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42 | value |= 0x00008000; /* Set ICE bit */ |
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43 | |
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44 | PPC_Set_HID0( value ); |
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45 | } |
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46 | |
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47 | void powerpc_data_cache_enable () |
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48 | { |
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49 | unsigned32 value; |
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50 | |
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51 | /* |
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52 | * enable data cache |
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53 | */ |
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54 | |
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55 | PPC_Get_HID0( value ); |
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56 | |
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57 | value |= 0x00004000; /* set DCE bit */ |
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58 | |
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59 | PPC_Set_HID0( value ); |
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60 | } |
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61 | |
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