summaryrefslogtreecommitdiff
path: root/src/cpu/minor/exec_context.hh
diff options
context:
space:
mode:
authorSteve Reinhardt <steve.reinhardt@amd.com>2016-01-17 18:27:46 -0800
committerSteve Reinhardt <steve.reinhardt@amd.com>2016-01-17 18:27:46 -0800
commit1b6355c89574c42c5b5f8014b994cf26dae4737d (patch)
tree53ef269f709829563084ba571504c8606ed7d89e /src/cpu/minor/exec_context.hh
parent707275265f188a514d1d5673ed4c8d6495304962 (diff)
downloadgem5-1b6355c89574c42c5b5f8014b994cf26dae4737d.tar.xz
cpu. arch: add initiateMemRead() to ExecContext interface
For historical reasons, the ExecContext interface had a single function, readMem(), that did two different things depending on whether the ExecContext supported atomic memory mode (i.e., AtomicSimpleCPU) or timing memory mode (all the other models). In the former case, it actually performed a memory read; in the latter case, it merely initiated a read access, and the read completion did not happen until later when a response packet arrived from the memory system. This led to some confusing things, including timing accesses being required to provide a pointer for the return data even though that pointer was only used in atomic mode. This patch splits this interface, adding a new initiateMemRead() function to the ExecContext interface to replace the timing-mode use of readMem(). For consistency and clarity, the readMemTiming() helper function in the ISA definitions is renamed to initiateMemRead() as well. For x86, where the access size is passed in explicitly, we can also get rid of the data parameter at this level. For other ISAs, where the access size is determined from the type of the data parameter, we have to keep the parameter for that purpose.
Diffstat (limited to 'src/cpu/minor/exec_context.hh')
-rw-r--r--src/cpu/minor/exec_context.hh5
1 files changed, 2 insertions, 3 deletions
diff --git a/src/cpu/minor/exec_context.hh b/src/cpu/minor/exec_context.hh
index 625d2b877..092ad5a2d 100644
--- a/src/cpu/minor/exec_context.hh
+++ b/src/cpu/minor/exec_context.hh
@@ -103,10 +103,9 @@ class ExecContext : public ::ExecContext
}
Fault
- readMem(Addr addr, uint8_t *data, unsigned int size,
- unsigned int flags)
+ initiateMemRead(Addr addr, unsigned int size, unsigned int flags)
{
- execute.getLSQ().pushRequest(inst, true /* load */, data,
+ execute.getLSQ().pushRequest(inst, true /* load */, nullptr,
size, addr, flags, NULL);
return NoFault;
}