Last change
on this file since 927 was
911,
checked in by alain, 10 years ago
|
The reset_buf_invalidate() function has been modified
to comply with the removing of the hard lock in the vci_mem_cache configuration interface.
|
File size:
1.6 KB
|
Line | |
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1 | /** |
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2 | * \file reset_inval.c |
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3 | * \date December 14, 2014 |
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4 | * \author Cesar Fuguet |
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5 | */ |
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6 | |
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7 | #include <reset_inval.h> |
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8 | #include <io.h> |
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9 | #include <defs.h> |
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10 | |
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11 | #ifndef SEG_MMC_BASE |
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12 | # error "SEG_MMC_BASE constant must be defined in the hard_config.h file" |
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13 | #endif |
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14 | |
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15 | static int* const mcc_address = (int* const)SEG_MMC_BASE; |
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16 | |
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17 | enum memc_registers |
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18 | { |
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19 | MCC_ADDR_LO = 0, |
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20 | MCC_ADDR_HI = 1, |
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21 | MCC_LENGTH = 2, |
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22 | MCC_CMD = 3 |
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23 | }; |
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24 | |
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25 | enum memc_operations |
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26 | { |
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27 | MCC_CMD_NOP = 0, |
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28 | MCC_CMD_INVAL = 1, |
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29 | MCC_CMD_SYNC = 2 |
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30 | }; |
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31 | |
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32 | /** |
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33 | * \brief Invalidate all data cache lines corresponding to a memory buffer |
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34 | * (identified by an address and a size) in L1 cache and L2 cache. |
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35 | */ |
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36 | void reset_buf_invalidate (void* const buffer, size_t size, int inval_memc) |
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37 | { |
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38 | unsigned int i; |
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39 | |
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40 | // iterate on L1 cache lines containing target buffer |
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41 | for (i = 0; i <= size; i += CACHE_LINE_SIZE) |
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42 | { |
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43 | asm volatile( |
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44 | " cache %0, %1" |
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45 | : /* no outputs */ |
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46 | : "i" (0x11), "R" (*((char*)buffer + i)) |
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47 | : "memory" |
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48 | ); |
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49 | } |
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50 | |
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51 | if (inval_memc) |
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52 | { |
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53 | // this preloader uses only the cluster 0 |
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54 | // It does not use the ADDR_HI bits, and does not take |
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55 | // any lock for exclusive access to MCC |
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56 | iowrite32(&mcc_address[MCC_ADDR_LO], (unsigned int) buffer); |
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57 | iowrite32(&mcc_address[MCC_ADDR_HI], (unsigned int) 0); |
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58 | iowrite32(&mcc_address[MCC_LENGTH] , (unsigned int) size); |
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59 | iowrite32(&mcc_address[MCC_CMD] , (unsigned int) MCC_CMD_INVAL); |
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60 | } |
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61 | } |
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62 | |
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63 | /* |
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64 | * vim: tabstop=4 : softtabstop=4 : shiftwidth=4 : expandtab |
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65 | */ |
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