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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
Download patch file Download diff file Expand all files Collapse all files

4
utils/regtools/qeditor/backend.cpp
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@ -266,7 +266,7 @@ bool HWStubDevice::ReadMem(soc_addr_t addr, size_t length, void *buffer)
{
if(!m_hwdev)
return false;
int ret = hwstub_rw_mem(m_hwdev, 1, addr, buffer, length);
int ret = hwstub_rw_mem_atomic(m_hwdev, 1, addr, buffer, length);
return ret >= 0 && (size_t)ret == length;
}
@ -274,7 +274,7 @@ bool HWStubDevice::WriteMem(soc_addr_t addr, size_t length, void *buffer)
{
if(!m_hwdev)
return false;
int ret = hwstub_rw_mem(m_hwdev, 0, addr, buffer, length);
int ret = hwstub_rw_mem_atomic(m_hwdev, 0, addr, buffer, length);
return ret >= 0 && (size_t)ret == length;
}