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STM32 F7 Ethernet: RX/TX descriptors should be flushed to memory when they are first initialized

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This commit is contained in:
Gregory Nutt 2015-07-20 07:05:35 -06:00
parent bab4a5308a
commit 3fa40fd3c8
1 changed files with 13 additions and 1 deletions
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14
arch/arm/src/stm32f7/stm32_ethernet.c
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@ -2984,7 +2984,13 @@ static void stm32_txdescinit(struct stm32_ethmac_s *priv,
}
}
/* Set Transmit Desciptor List Address Register */
/* Flush all of the initialized TX descriptors to physical memory */
arch_clean_dcache((uintptr_t)txtable,
(uintptr_t)txtable +
TXTABLE_SIZE * sizeof(union stm32_txdesc_u));
/* Set Transmit Descriptor List Address Register */
stm32_putreg((uint32_t)&txtable[0].txdesc, STM32_ETH_DMATDLAR);
}
@ -3068,6 +3074,12 @@ static void stm32_rxdescinit(struct stm32_ethmac_s *priv,
}
}
/* Flush all of the initialized RX descriptors to physical memory */
arch_clean_dcache((uintptr_t)rxtable,
(uintptr_t)rxtable +
RXTABLE_SIZE * sizeof(union stm32_rxdesc_u));
/* Set Receive Descriptor List Address Register */
stm32_putreg((uint32_t)&rxtable[0].rxdesc, STM32_ETH_DMARDLAR);