Last change
on this file since 924 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
|
Rev | Line | |
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[758] | 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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[911] | 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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[758] | 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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[911] | 40 | // iterate on L1 cache lines containing target buffer |
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[758] | 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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[911] | 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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[758] | 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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