stm32f3: flash: add prefetch helpers
Should be added to f2/f4 as well, but the bit definitions are different.
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@ -67,6 +67,14 @@
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#define FLASH_CR_MER (1 << 2)
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#define FLASH_CR_PER (1 << 1)
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#define FLASH_CR_PG (1 << 0)
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BEGIN_DECLS
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void flash_prefetch_enable(void);
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void flash_prefetch_disable(void);
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END_DECLS
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/**@}*/
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#endif
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@ -58,5 +58,26 @@ void flash_clear_status_flags(void)
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flash_clear_eop_flag();
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flash_clear_bsy_flag();
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}
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/**
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* Enable the FLASH Prefetch Buffer
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* This buffer is used for instruction fetches and is enabled by default after
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* reset.
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*/
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void flash_prefetch_enable(void)
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{
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FLASH_ACR |= FLASH_ACR_PRFTBE;
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}
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/**
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* Disable the FLASH Prefetch Buffer
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* This buffer is used for instruction fetches and is enabled by default after
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* reset.
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*/
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void flash_prefetch_disable(void)
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{
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FLASH_ACR &= ~FLASH_ACR_PRFTBE;
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}
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/**@}*/
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