1 files changed, 64 insertions, 0 deletions
diff --git a/firmware/zpu/lib/pkt_ctrl.c b/firmware/zpu/lib/pkt_ctrl.c
new file mode 100644
index 000000000..ebda35049
--- /dev/null
+++ b/firmware/zpu/lib/pkt_ctrl.c
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2010 Ettus Research LLC
+ *
+ * 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/>.
+ */
+
+#include "pkt_ctrl.h"
+#include "memory_map.h"
+#include <nonstdio.h>
+
+void pkt_ctrl_program_inspector(
+    const struct ip_addr *ip_addr, uint16_t data_port
+){
+    router_ctrl->ip_addr = ip_addr->addr;
+    router_ctrl->data_ports = data_port;
+}
+
+void pkt_ctrl_set_routing_mode(pkt_ctrl_routing_mode_t mode){
+    switch(mode){
+    case PKT_CTRL_ROUTING_MODE_SLAVE:  router_ctrl->mode_ctrl = 0; break;
+    case PKT_CTRL_ROUTING_MODE_MASTER: router_ctrl->mode_ctrl = 1; break;
+    }
+}
+
+static inline bool is_status_bit_set(int bit){
+    return router_status->status & (1 << bit);
+}
+
+#define CPU_OUT_HS_BIT 0 //from packet router to CPU
+#define CPU_INP_HS_BIT 1 //from CPU to packet router
+
+void *pkt_ctrl_claim_incoming_buffer(size_t *num_lines){
+    if (!is_status_bit_set(CPU_OUT_HS_BIT)) return NULL;
+    *num_lines = (router_status->status >> 16) & 0xffff;
+    return router_ram(0);
+}
+
+void pkt_ctrl_release_incoming_buffer(void){
+    router_ctrl->cpu_out_ctrl = 1;
+    while (is_status_bit_set(CPU_OUT_HS_BIT)){}
+    router_ctrl->cpu_out_ctrl = 0;
+}
+
+void *pkt_ctrl_claim_outgoing_buffer(void){
+    while (!is_status_bit_set(CPU_INP_HS_BIT)){}
+    return router_ram(1);
+}
+
+void pkt_ctrl_commit_outgoing_buffer(size_t num_lines){
+    router_ctrl->cpu_inp_ctrl = ((num_lines & 0xffff) << 16) | 1;
+    while (is_status_bit_set(CPU_INP_HS_BIT)){}
+    router_ctrl->cpu_inp_ctrl = 0;
+}