From 0669dd82e2bc19c007690c6723cb4230ac4a55f9 Mon Sep 17 00:00:00 2001
From: Liav A <liavalb@gmail.com>
Date: Fri, 23 Apr 2021 14:15:08 +0300
Subject: [PATCH] Kernel/PCI: Add helper to determine if device can access IO
 space

---
 Kernel/PCI/Access.cpp    | 4 ++++
 Kernel/PCI/Definitions.h | 1 +
 2 files changed, 5 insertions(+)

diff --git a/Kernel/PCI/Access.cpp b/Kernel/PCI/Access.cpp
index 85c3f42abc..39ff9eef4e 100644
--- a/Kernel/PCI/Access.cpp
+++ b/Kernel/PCI/Access.cpp
@@ -204,6 +204,10 @@ void disable_memory_space(Address address)
 {
     write16(address, PCI_COMMAND, read16(address, PCI_COMMAND) & ~(1 << 1));
 }
+bool is_io_space_enabled(Address address)
+{
+    return (read16(address, PCI_COMMAND) & 1) != 0;
+}
 
 void enable_interrupt_line(Address address)
 {
diff --git a/Kernel/PCI/Definitions.h b/Kernel/PCI/Definitions.h
index 0be1437abc..66fba2934e 100644
--- a/Kernel/PCI/Definitions.h
+++ b/Kernel/PCI/Definitions.h
@@ -204,6 +204,7 @@ private:
 };
 
 ID get_id(PCI::Address);
+bool is_io_space_enabled(Address);
 void enumerate(Function<void(Address, ID)> callback);
 void enable_interrupt_line(Address);
 void disable_interrupt_line(Address);