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hwstub/qeditor: add support for atomic read/writes

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The current code assumed that READ/WRITE would produce atomic read/writes for
8/16/32-bit words, which in turned put assumption on the memcpy function.
Since some memcpy implementation do not always guarantee such strong assumption,
introduce two new operation READ/WRITE_ATOMIC which provide the necessary
tools to do correct read and write to register in a single memory access.

Change-Id: I37451bd5057bb0dcaf5a800d8aef8791c792a090
This commit is contained in:
Marcin Bukat 2014-11-18 23:27:26 +01:00
parent 794169a18f
commit cd04a5f1aa
12 changed files with 254 additions and 24 deletions
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8
utils/hwstub/stub/target.h
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@ -33,6 +33,14 @@ void target_get_config_desc(void *buffer, int *size);
void target_udelay(int us);
/* Wait for a short time (ms <= 1000) */
void target_mdelay(int ms);
/* Read a n-bit word atomically */
uint8_t target_read8(const void *addr);
uint16_t target_read16(const void *addr);
uint32_t target_read32(const void *addr);
/* Write a n-bit word atomically */
void target_write8(void *addr, uint8_t val);
void target_write16(void *addr, uint16_t val);
void target_write32(void *addr, uint32_t val);
/* mandatory for all targets */
extern struct hwstub_target_desc_t target_descriptor;