From e17b3fd884c8090ae2a1e56d4c999103800254da Mon Sep 17 00:00:00 2001
From: Marcin Szymczyk <marcin.szymczyk@nordicsemi.no>
Date: Thu, 23 May 2024 17:02:23 +0200
Subject: [PATCH] arch: riscv: implement `arch_irq_disconnect_dynamic`

For SoC with `CONFIG_RISCV_RESERVED_IRQ_ISR_TABLES_OFFSET`,
it should be taken into consideration when disconnecting IRQ.

Signed-off-by: Marcin Szymczyk <marcin.szymczyk@nordicsemi.no>
---
 arch/riscv/core/irq_manage.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/riscv/core/irq_manage.c b/arch/riscv/core/irq_manage.c
index b60deceefab..358b07534be 100644
--- a/arch/riscv/core/irq_manage.c
+++ b/arch/riscv/core/irq_manage.c
@@ -9,6 +9,7 @@
 #include <zephyr/logging/log.h>
 #include <zephyr/arch/riscv/csr.h>
 #include <zephyr/irq_multilevel.h>
+#include <zephyr/sw_isr_table.h>
 
 #ifdef CONFIG_RISCV_HAS_PLIC
 #include <zephyr/drivers/interrupt_controller/riscv_plic.h>
@@ -53,4 +54,17 @@ int arch_irq_connect_dynamic(unsigned int irq, unsigned int priority,
 #endif
 	return irq;
 }
+
+#ifdef CONFIG_SHARED_INTERRUPTS
+int arch_irq_disconnect_dynamic(unsigned int irq, unsigned int priority,
+				void (*routine)(const void *parameter), const void *parameter,
+				uint32_t flags)
+{
+	ARG_UNUSED(priority);
+	ARG_UNUSED(flags);
+
+	return z_isr_uninstall(irq + CONFIG_RISCV_RESERVED_IRQ_ISR_TABLES_OFFSET, routine,
+			       parameter);
+}
+#endif /* CONFIG_SHARED_INTERRUPTS */
 #endif /* CONFIG_DYNAMIC_INTERRUPTS */