Copied a snapshot of the usrp2 firmware into the microblaze firmware directory in the uhd repo.

Added erllc copyrights to the files created and modified at erllc.

1 files changed, 90 insertions, 0 deletions

diff --git a/firmware/microblaze/lib/dbsm.h b/firmware/microblaze/lib/dbsm.h
new file mode 100644
index 000000000..cb7e12fc3
--- /dev/null
+++ b/firmware/microblaze/lib/dbsm.h
@@ -0,0 +1,90 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2007 Free Software Foundation, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef INCLUDED_DBSM_H
+#define INCLUDED_DBSM_H
+
+/*
+ * Double Buffering State Machine
+ */
+
+#include <stdint.h>
+#include <stdbool.h>
+
+struct _dbsm;
+typedef struct _dbsm dbsm_t;
+
+/*
+ * pointer to function that does packet inspection.
+ *
+ * If one of these returns true, it means that the s/w
+ * handled that packet, and that it should NOT be passed
+ * on to the normal destination port.
+ */
+typedef bool (*inspector_t)(dbsm_t *sm, int buf_this);
+
+bool dbsm_nop_inspector(dbsm_t *sm, int buf_this);	// returns false
+
+
+typedef struct
+{
+  uint16_t	port;
+  uint16_t	first_line;
+  uint16_t	last_line;
+} buf_cmd_args_t;
+
+/*!
+ * double buffer state machine
+ */
+struct _dbsm
+{
+  uint8_t	  buf0;	     // Must be even. This machine uses buf0 and buf0+1
+  uint8_t	  running;
+  uint8_t	  rx_idle;
+  uint8_t	  tx_idle;
+  buf_cmd_args_t  recv_args;
+  buf_cmd_args_t  send_args;
+  inspector_t	  inspect;
+  uint32_t	  precomputed_receive_to_buf_ctrl_word[2];
+  uint32_t	  precomputed_send_from_buf_ctrl_word[2];
+  int		  last_line_adj;
+};
+
+void dbsm_init(dbsm_t *sm, int buf0,
+	       const buf_cmd_args_t *recv, const buf_cmd_args_t *send,
+	       inspector_t inspect);
+
+void dbsm_start(dbsm_t *sm);
+void dbsm_stop(dbsm_t *sm);
+void dbsm_process_status(dbsm_t *sm, uint32_t status);
+void dbsm_handle_tx_underrun(dbsm_t *sm);
+void dbsm_handle_rx_overrun(dbsm_t *sm);
+
+/*
+ * The cpu calls this when it want to ensure that it can send a buffer
+ * to the same destination being used by this state machine.
+ *
+ * If neither buffer is EMPTYING it returns immediately.  If a buffer
+ * is EMPYTING, it waits for the h/w to transition to the DONE or
+ * ERROR state.
+ *
+ * When this function returns, the caller queues it's buffer and busy
+ * waits for it to complete.
+ */
+void dbsm_wait_for_opening(dbsm_t *sm);
+
+#endif /* INCLUDED_DBSM_H */