From fae5fce8ffecdcb6a041435adb7254d720884de3 Mon Sep 17 00:00:00 2001
From: Uros Majstorovic <majstor@majstor.org>
Date: Wed, 16 Oct 2019 00:02:41 +0200
Subject: envent q added eos_evtq_wait

---
 code/fe310/eos/event.c | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

(limited to 'code/fe310/eos/event.c')

diff --git a/code/fe310/eos/event.c b/code/fe310/eos/event.c
index 9e3fb90..25a4feb 100644
--- a/code/fe310/eos/event.c
+++ b/code/fe310/eos/event.c
@@ -16,6 +16,8 @@ static eos_evt_fptr_t evt_handler[EOS_EVT_MAX_EVT];
 static uint16_t evt_handler_wrapper_acq[EOS_EVT_MAX_EVT];
 static uint16_t evt_handler_flags_buf_acq[EOS_EVT_MAX_EVT];
 
+static volatile char evt_busy = 0;
+
 void eos_evtq_init(void) {
     int i;
     
@@ -86,6 +88,23 @@ void eos_evtq_set_flags(unsigned char type, uint8_t flags) {
     if ((idx < EOS_EVT_MAX_EVT) && (flags & EOS_EVT_FLAG_NET_BUF_ACQ)) evt_handler_flags_buf_acq[idx] |= flag;
 }
 
+void eos_evtq_set_busy(char busy) {
+    evt_busy = busy;
+}
+
+void eos_evtq_wait(unsigned char type, unsigned char *selector, uint16_t sel_len, unsigned char **buffer, uint16_t *len) {
+    int rv = 0;
+
+    while(!rv) {
+        clear_csr(mstatus, MSTATUS_MIE);
+        rv = eos_msgq_get(&_eos_event_q, type, selector, sel_len, buffer, len);
+        if (!rv) {
+            asm volatile ("wfi");
+        }
+        set_csr(mstatus, MSTATUS_MIE);
+    }
+}
+
 void eos_evtq_loop(void) {
     unsigned char type;
     unsigned char *buffer;
@@ -100,7 +119,7 @@ void eos_evtq_loop(void) {
             evtq_handler(type, buffer, len);
             clear_csr(mstatus, MSTATUS_MIE);
         } else {
-            // asm volatile ("wfi");
+            if (!evt_busy) asm volatile ("wfi");
         }
         set_csr(mstatus, MSTATUS_MIE);
     }
-- 
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