added rv32 implementation for get lock

analogdevicesinc · Oct 24, 2024 · 9554720 · 9554720
1 parent 5dab6a1
commit 9554720
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Showing 2 changed files with 17 additions and 10 deletions.
diff --git a/Libraries/PeriphDrivers/Source/SYS/mxc_lock.c b/Libraries/PeriphDrivers/Source/SYS/mxc_lock.c
@@ -52,13 +52,26 @@ void MXC_FreeLock(uint32_t *lock)
 /* ************************************************************************** */
 int MXC_GetLock(uint32_t *lock, uint32_t value)
 {
-#warning "Unimplemented for RISCV"
+
+    __disable_irq();
+    if(*lock)
+    {
+        __enable_irq();
+        return E_BUSY;
+    }
+
+    *lock = value
+
+    // Ensure memory ordering
+    __asm volatile("fence rw, rw");
+    __enable_irq();
     return E_NO_ERROR;
 }
 
 /* ************************************************************************** */
-void MXC_FreeLock(uint32_t *lock)
-{
-#warning "Unimplemented for RISCV"
+void MXC_FreeLock(uint32_t *lock) {
+    __asm volatile("fence" ::: "memory");
+    *lock = 0;
+
 }
 #endif
diff --git a/Libraries/PeriphDrivers/libPeriphDriver.mk b/Libraries/PeriphDrivers/libPeriphDriver.mk
@@ -64,13 +64,7 @@ include ${CMSIS_ROOT}/../PeriphDrivers/$(TARGET_LC)_files.mk
 PERIPH_DRIVER_C_FILES += $(SOURCE_DIR)/SYS/mxc_assert.c
 PERIPH_DRIVER_C_FILES += $(SOURCE_DIR)/SYS/mxc_delay.c
 PERIPH_DRIVER_C_FILES += $(SOURCE_DIR)/SYS/nvic_table.c
-# TODO(JC): Implement mxc_lock for RISC-V.  Skip for now.
-ifneq "$(RISCV_CORE)" "1"
-ifneq "$(RISCV_CORE)" "RV32"
-# ^ NOTE(JC): Some legacy Makefiles use "RV32".  We recommend using "1" in the UG
 PERIPH_DRIVER_C_FILES += $(SOURCE_DIR)/SYS/mxc_lock.c
-endif
-endif
 
 # # Where to find header files for this project
 IPATH += $(PERIPH_DRIVER_INCLUDE_DIR)