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| author | Hsiangkai Wang <hsiangkai@gmail.com> | 2013-07-11 10:08:15 +0800 |
|---|---|---|
| committer | Spencer Oliver <spen@spen-soft.co.uk> | 2013-09-13 19:37:54 +0000 |
| commit | 18c40eb9e53f559e089b6f745284cf42718182da (patch) | |
| tree | ecc34310b812dcb68b9abb0e907f346ad1b0ae46 /src/target | |
| parent | 586575c9dcc18154eeb4e893e554371c69ac0b9d (diff) | |
| download | riscv-openocd-18c40eb9e53f559e089b6f745284cf42718182da.zip riscv-openocd-18c40eb9e53f559e089b6f745284cf42718182da.tar.gz riscv-openocd-18c40eb9e53f559e089b6f745284cf42718182da.tar.bz2 | |
nds32: Use DMA to access memory as no DCache
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>
Diffstat (limited to 'src/target')
| -rw-r--r-- | src/target/nds32_v3_common.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/src/target/nds32_v3_common.c b/src/target/nds32_v3_common.c index e88430f..e01025f 100644 --- a/src/target/nds32_v3_common.c +++ b/src/target/nds32_v3_common.c @@ -555,19 +555,25 @@ int nds32_v3_write_buffer(struct target *target, uint32_t address, 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; - int result; - 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); - 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); + } return result; } |