As GDB uses file-I/O protocol to access memory, use DMA to access
if no DCache. This commit improves the performance of Andes
Virtual Hosting.
Change-Id: I36bb2154b9f497fc4237625836cf8c7115330a60
Signed-off-by: Hsiangkai Wang <hsiangkai@gmail.com>
Reviewed-on: http://openocd.zylin.com/1580
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
return ERROR_FAIL;
if (nds32->hit_syscall) {
return ERROR_FAIL;
if (nds32->hit_syscall) {
- /* Use bus mode to access memory during virtual hosting */
struct aice_port_s *aice = target_to_aice(target);
enum nds_memory_access origin_access_channel;
struct aice_port_s *aice = target_to_aice(target);
enum nds_memory_access origin_access_channel;
origin_access_channel = memory->access_channel;
origin_access_channel = memory->access_channel;
- memory->access_channel = NDS_MEMORY_ACC_BUS;
- aice_memory_access(aice, NDS_MEMORY_ACC_BUS);
+ /* If target has no cache, use BUS mode to access memory. */
+ if ((memory->dcache.line_size == 0)
+ || (memory->dcache.enable == false)) {
+ /* There is no Dcache or Dcache is disabled. */
+ memory->access_channel = NDS_MEMORY_ACC_BUS;
+ aice_memory_access(aice, NDS_MEMORY_ACC_BUS);
+ }
+
+ int result;
result = nds32_gdb_fileio_write_memory(nds32, address, size, buffer);
result = nds32_gdb_fileio_write_memory(nds32, address, size, buffer);
- memory->access_channel = origin_access_channel;
- aice_memory_access(aice, origin_access_channel);
+ if (NDS_MEMORY_ACC_CPU == origin_access_channel) {
+ memory->access_channel = NDS_MEMORY_ACC_CPU;
+ aice_memory_access(aice, NDS_MEMORY_ACC_CPU);
+ }
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