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Add __restrict keyword and memore alignment to src/dst pointer of

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_tu_fifo_read_from_const_src_ptr()
 _tu_fifo_write_to_const_dst_ptr()
This commit is contained in:
Reinhard Panhuber 2021-01-20 20:14:23 +01:00
parent 93ec6f3735
commit f1551d7a5f
1 changed files with 4 additions and 4 deletions
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8
src/common/tusb_fifo.c
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@ -95,9 +95,9 @@ static inline uint16_t _ff_mod(uint16_t idx, uint16_t depth)
// Intended to be used to read from hardware USB FIFO in e.g. STM32 where all data is read from a constant address
// Code adapted from dcd_synopsis.c
static void _tu_fifo_read_from_const_src_ptr(void * dst, const void * src, uint16_t len)
static void _tu_fifo_read_from_const_src_ptr(void * __restrict dst, const void * __restrict src, uint16_t len)
{
uint8_t * dst_u8 = (uint8_t *)dst;
uint8_t CFG_TUSB_MEM_ALIGN * dst_u8 = (uint8_t *)dst;
volatile uint32_t * rx_fifo = (volatile uint32_t *) src;
// Reading full available 32 bit words from FIFO
@ -127,10 +127,10 @@ static void _tu_fifo_read_from_const_src_ptr(void * dst, const void * src, uint1
// Intended to be used to write to hardware USB FIFO in e.g. STM32 where all data is written to a constant address
// Code adapted from dcd_synopsis.c
static void _tu_fifo_write_to_const_dst_ptr(void * dst, const void * src, uint16_t len)
static void _tu_fifo_write_to_const_dst_ptr(void * __restrict dst, const void * __restrict src, uint16_t len)
{
volatile uint32_t * tx_fifo = (volatile uint32_t *) dst;
uint8_t * src_u8 = (uint8_t *)src;
uint8_t CFG_TUSB_MEM_ALIGN * src_u8 = (uint8_t *)src;
// Pushing full available 32 bit words to FIFO
uint16_t full_words = len >> 2;