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 ++++++++++++++++++++-
 code/fe310/eos/event.h   |  2 ++
 code/fe310/eos/evt_def.h | 12 ++++++------
 code/fe310/eos/msgq.c    |  9 +++++----
 code/fe310/eos/msgq.h    |  2 +-
 5 files changed, 34 insertions(+), 12 deletions(-)

(limited to 'code')

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);
     }
diff --git a/code/fe310/eos/event.h b/code/fe310/eos/event.h
index a9a98ef..3d9692d 100644
--- a/code/fe310/eos/event.h
+++ b/code/fe310/eos/event.h
@@ -10,4 +10,6 @@ void eos_evtq_pop(unsigned char *type, unsigned char **buffer, uint16_t *len);
 void eos_evtq_bad_handler(unsigned char type, unsigned char *buffer, uint16_t len);
 void eos_evtq_set_handler(unsigned char type, eos_evt_fptr_t handler);
 void eos_evtq_set_flags(unsigned char type, uint8_t flags);
+void eos_evtq_wait(unsigned char type, unsigned char *selector, uint16_t sel_len, unsigned char **buffer, uint16_t *len);
 void eos_evtq_loop(void);
+
diff --git a/code/fe310/eos/evt_def.h b/code/fe310/eos/evt_def.h
index a011638..ee08d7d 100644
--- a/code/fe310/eos/evt_def.h
+++ b/code/fe310/eos/evt_def.h
@@ -1,12 +1,12 @@
 #define EOS_EVT_FLAG_NET_BUF_ACQ    0x1
 
-#define EOS_EVT_NET                 0x10
-#define EOS_EVT_TIMER               0x20
-#define EOS_EVT_AUDIO               0x30
-#define EOS_EVT_UI                  0x40
-#define EOS_EVT_USER                0x80
+#define EOS_EVT_TIMER               0x10
+#define EOS_EVT_AUDIO               0x20
+#define EOS_EVT_NET                 0x30
+#define EOS_EVT_SPI                 0x40
+#define EOS_EVT_USER                0x50
 
+#define EOS_EVT_MAX_EVT             8
 #define EOS_EVT_MASK                0xF0
 
-#define EOS_EVT_MAX_EVT             8
 #define EOS_EVT_SIZE_Q              4
diff --git a/code/fe310/eos/msgq.c b/code/fe310/eos/msgq.c
index 0c5d8f1..98ec4aa 100644
--- a/code/fe310/eos/msgq.c
+++ b/code/fe310/eos/msgq.c
@@ -42,13 +42,13 @@ void eos_msgq_pop(EOSMsgQ *msgq, unsigned char *type, unsigned char **buffer, ui
     }
 }
 
-void eos_msgq_get(EOSMsgQ *msgq, unsigned char type, unsigned char *selector, uint16_t sel_len, unsigned char **buffer, uint16_t *len) {
+int eos_msgq_get(EOSMsgQ *msgq, unsigned char type, unsigned char *selector, uint16_t sel_len, unsigned char **buffer, uint16_t *len) {
     uint8_t i, j, idx;
     
     if (msgq->idx_r == msgq->idx_w) {
         *buffer = NULL;
         *len = 0;
-        return;
+        return 0;
     }
 
     idx = EOS_MSGQ_IDX_MASK(msgq->idx_r, msgq->size);
@@ -57,7 +57,7 @@ void eos_msgq_get(EOSMsgQ *msgq, unsigned char type, unsigned char *selector, ui
         *len = msgq->array[idx].len;
         if ((selector == NULL) || (sel_len == 0) || ((sel_len <= *len) && (memcmp(selector, *buffer, sel_len) == 0))) {
             msgq->idx_r++;
-            return;
+            return 1;
         }
     }
     for (i = msgq->idx_r + 1; EOS_MSGQ_IDX_LT(i, msgq->idx_w); i++) {
@@ -70,11 +70,12 @@ void eos_msgq_get(EOSMsgQ *msgq, unsigned char type, unsigned char *selector, ui
                     msgq->array[EOS_MSGQ_IDX_MASK(j - 1, msgq->size)] = msgq->array[EOS_MSGQ_IDX_MASK(j, msgq->size)];
                 }
                 msgq->idx_w--;
-                return;
+                return 1;
             }
         }
     }
     *buffer = NULL;
     *len = 0;
+    return 0;
 }
 
diff --git a/code/fe310/eos/msgq.h b/code/fe310/eos/msgq.h
index a280357..aea4273 100644
--- a/code/fe310/eos/msgq.h
+++ b/code/fe310/eos/msgq.h
@@ -16,4 +16,4 @@ typedef struct EOSMsgQ {
 void eos_msgq_init(EOSMsgQ *msgq, EOSMsgItem *array, uint8_t size);
 int eos_msgq_push(EOSMsgQ *msgq, unsigned char type, unsigned char *buffer, uint16_t len);
 void eos_msgq_pop(EOSMsgQ *msgq, unsigned char *type, unsigned char **buffer, uint16_t *len);
-void eos_msgq_get(EOSMsgQ *msgq, unsigned char type, unsigned char *selector, uint16_t sel_len, unsigned char **buffer, uint16_t *len);
\ No newline at end of file
+int eos_msgq_get(EOSMsgQ *msgq, unsigned char type, unsigned char *selector, uint16_t sel_len, unsigned char **buffer, uint16_t *len);
\ No newline at end of file
-- 
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