hwstub/qeditor: add support for atomic read/writes

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

1 files changed, 8 insertions, 0 deletions

diff --git a/utils/hwstub/stub/target.h b/utils/hwstub/stub/target.h
index cb17401a9c..5cd049d04f 100644
--- a/utils/hwstub/stub/target.h
+++ b/utils/hwstub/stub/target.h
@@ -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;