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use unaligned access read for hw fifo

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This commit is contained in:
hathach
2023-07-07 12:27:18 +07:00
parent 4bbacb1008
commit 4c156100fa
3 changed files with 72 additions and 37 deletions
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18
src/common/tusb_common.h
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@@ -260,11 +260,21 @@ TU_ATTR_ALWAYS_INLINE static inline void tu_unaligned_write16(void* mem, uint16_
#else
// MCU that could access unaligned memory natively
TU_ATTR_ALWAYS_INLINE static inline uint32_t tu_unaligned_read32 (const void* mem) { return *((uint32_t const *) mem); }
TU_ATTR_ALWAYS_INLINE static inline uint16_t tu_unaligned_read16 (const void* mem) { return *((uint16_t const *) mem); }
TU_ATTR_ALWAYS_INLINE static inline uint32_t tu_unaligned_read32(const void *mem) {
return *((uint32_t const *) mem);
}
TU_ATTR_ALWAYS_INLINE static inline void tu_unaligned_write32 (void* mem, uint32_t value ) { *((uint32_t*) mem) = value; }
TU_ATTR_ALWAYS_INLINE static inline void tu_unaligned_write16 (void* mem, uint16_t value ) { *((uint16_t*) mem) = value; }
TU_ATTR_ALWAYS_INLINE static inline uint16_t tu_unaligned_read16(const void *mem) {
return *((uint16_t const *) mem);
}
TU_ATTR_ALWAYS_INLINE static inline void tu_unaligned_write32(void *mem, uint32_t value) {
*((uint32_t *) mem) = value;
}
TU_ATTR_ALWAYS_INLINE static inline void tu_unaligned_write16(void *mem, uint16_t value) {
*((uint16_t *) mem) = value;
}
#endif

12
src/common/tusb_mcu.h
View File

@@ -34,10 +34,16 @@
//------------- Unaligned Memory Access -------------//
// ARMv7+ (M3-M7, M23-M33) can access unaligned memory
#if (defined(__ARM_ARCH) && (__ARM_ARCH >= 7))
#define TUP_ARCH_STRICT_ALIGN 0
#ifdef __ARM_ARCH
// ARM Architecture set __ARM_FEATURE_UNALIGNED to 1 for mcu supports unaligned access
#if defined(__ARM_FEATURE_UNALIGNED) && __ARM_FEATURE_UNALIGNED == 1
#define TUP_ARCH_STRICT_ALIGN 0
#else
#define TUP_ARCH_STRICT_ALIGN 1
#endif
#else
// TODO default to strict align for others
// Should investigate other architecture such as risv, xtensa, mips for optimal setting
#define TUP_ARCH_STRICT_ALIGN 1
#endif