commit fbdbb4b8c1509ceee93d9d7eb0f34b630a4e8b0d
author David Woodhouse <David.Woodhouse@intel.com> Tue Feb 05 16:37:27 2013 +0000
committer Kevin O'Connor <kevin@koconnor.net> Thu Feb 07 19:58:42 2013 -0500
tree 4fca435e10d775b6c1f4d7ad26aa217daca2502f
parent a82be563f9b9e0b15e5525ab90fdc89de2d739aa

Add pic_save_mask() and pic_restore_mask() functions

CSM will (unfortunately) need to use these.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

src/pic.c

diff --git a/src/pic.c b/src/pic.c
index 8992a8b..669d670 100644
--- a/src/pic.c
+++ b/src/pic.c
@@ -50,3 +50,19 @@
     dprintf(DEBUG_ISR_hwpic2, "handle_hwpic2 irq=%x\n", get_pic2_isr());
     eoi_pic2();
 }
+
+u8 saved_pic_mask[2] = { ~PIC1_IRQ2, ~0 };
+
+void
+pic_save_mask(void)
+{
+    saved_pic_mask[0] = inb(PORT_PIC1_DATA);
+    saved_pic_mask[1] = inb(PORT_PIC2_DATA);
+}
+
+void
+pic_restore_mask(void)
+{
+    outb(saved_pic_mask[0], PORT_PIC1_DATA);
+    outb(saved_pic_mask[1], PORT_PIC2_DATA);
+}

src/pic.h

diff --git a/src/pic.h b/src/pic.h
index c75af3e..0ea5622 100644
--- a/src/pic.h
+++ b/src/pic.h
@@ -93,5 +93,7 @@
 
 void set_pics(u8 irq0, u8 irq8);
 void pic_setup(void);
+void pic_save_mask(void);
+void pic_restore_mask(void);
 
 #endif // pic.h