jtag/drivers/cmsis_dap: speed up long transfers using DAP_TransferBlock

[openocd.git] / src / jtag / drivers / cmsis_dap.h

diff --git a/src/jtag/drivers/cmsis_dap.h b/src/jtag/drivers/cmsis_dap.h
index 1c30975da1f20864fadd6401d2316dc89e9ec248..16885a51d420e1b1d7bbddfa28b9f0c5eca77bb6 100644 (file)
--- a/src/jtag/drivers/cmsis_dap.h
+++ b/src/jtag/drivers/cmsis_dap.h
@@ -21,6 +21,7 @@ struct pending_transfer_result {
 struct pending_request_block {
        struct pending_transfer_result *transfers;
        unsigned int transfer_count;
+       uint8_t command;
 };
 
 struct cmsis_dap {
@@ -33,11 +34,17 @@ struct cmsis_dap {
        uint8_t *command;
        uint8_t *response;
 
-       /* DAP register r/w operation counters used for checking the packet size
+       /* DP/AP register r/w operation counters used for checking the packet size
         * that would result from the queue run */
        unsigned int write_count;
        unsigned int read_count;
 
+       /* We can use DAP_TransferBlock only if all SWD operations in the packet
+        * are either all writes or all reads and use the same DP/AP register.
+        * The following variables keep track of it */
+       uint8_t common_swd_cmd;
+       bool swd_cmds_differ;
+
        /* Pending requests are organized as a FIFO - circular buffer */
        struct pending_request_block pending_fifo[MAX_PENDING_REQUESTS];
        unsigned int packet_count;