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[PULL,08/27] target-arm/arm-semi.c: Implement A64 specific SyncCacheRange call

Message ID 1441379156-23939-9-git-send-email-peter.maydell@linaro.org
State Accepted
Commit e9ebfbfcf31c11fb3bd2fc436fa17ce45a4e7086
Headers show

Commit Message

Peter Maydell Sept. 4, 2015, 3:05 p.m. UTC 
The A64 semihosting ABI defines a new call SyncCacheRange
for doing a 'clean D-cache and invalidate I-cache' sequence.
Since QEMU doesn't implement caches, we can implement this as a nop.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Christopher Covington <christopher.covington@linaro.org>
Tested-by: Christopher Covington <cov@codeaurora.org>
Message-id: 1439483745-28752-8-git-send-email-peter.maydell@linaro.org
---
 target-arm/arm-semi.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
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Patch

diff --git a/target-arm/arm-semi.c b/target-arm/arm-semi.c
index 1d4cc59..1d0d7aa 100644
--- a/target-arm/arm-semi.c
+++ b/target-arm/arm-semi.c
@@ -58,6 +58,7 @@ 
 #define TARGET_SYS_GET_CMDLINE 0x15
 #define TARGET_SYS_HEAPINFO    0x16
 #define TARGET_SYS_EXIT        0x18
+#define TARGET_SYS_SYNCCACHE   0x19
 
 /* ADP_Stopped_ApplicationExit is used for exit(0),
  * anything else is implemented as exit(1) */
@@ -623,6 +624,15 @@  target_ulong do_arm_semihosting(CPUARMState *env)
         ret = (args == ADP_Stopped_ApplicationExit) ? 0 : 1;
         gdb_exit(env, ret);
         exit(ret);
+    case TARGET_SYS_SYNCCACHE:
+        /* Clean the D-cache and invalidate the I-cache for the specified
+         * virtual address range. This is a nop for us since we don't
+         * implement caches. This is only present on A64.
+         */
+        if (is_a64(env)) {
+            return 0;
+        }
+        /* fall through -- invalid for A32/T32 */
     default:
         fprintf(stderr, "qemu: Unsupported SemiHosting SWI 0x%02x\n", nr);
         cpu_dump_state(cs, stderr, fprintf, 0);