From fbebe4e7770ae2d5b532ff04411d843acdf467ad Mon Sep 17 00:00:00 2001
From: nyan <nyan@FreeBSD.org>
Date: Fri, 16 Mar 2012 12:13:44 +0000
Subject: - Fix to build a native i386 kernel without the SMP and atpic. -
 Merge r232744 changes to pc98.   (Allow a kernel to be built with 'nodevice
 atpic'.) - Move ICU related defines from x86/isa/atpic.c to x86/isa/icu.h and
   use them in x86/x86/intr_machdep.c.

Reviewed by:	jhb
---
 sys/x86/isa/icu.h | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

(limited to 'sys/x86/isa/icu.h')

diff --git a/sys/x86/isa/icu.h b/sys/x86/isa/icu.h
index d7cd87a..74b21fd 100644
--- a/sys/x86/isa/icu.h
+++ b/sys/x86/isa/icu.h
@@ -47,6 +47,48 @@
 #define	ICU_IMR_OFFSET	1
 #endif
 
+/*
+ * PC-98 machines wire the slave 8259A to pin 7 on the master PIC, and
+ * PC-AT machines wire the slave PIC to pin 2 on the master PIC.
+ */
+#ifdef PC98
+#define	ICU_SLAVEID	7
+#else
+#define	ICU_SLAVEID	2
+#endif
+
+/*
+ * Determine the base master and slave modes not including auto EOI support.
+ * All machines that FreeBSD supports use 8086 mode.
+ */
+#ifdef PC98
+/*
+ * PC-98 machines do not support auto EOI on the second PIC.  Also, it
+ * seems that PC-98 machine PICs use buffered mode, and the master PIC
+ * uses special fully nested mode.
+ */
+#define	BASE_MASTER_MODE	(ICW4_SFNM | ICW4_BUF | ICW4_MS | ICW4_8086)
+#define	BASE_SLAVE_MODE		(ICW4_BUF | ICW4_8086)
+#else
+#define	BASE_MASTER_MODE	ICW4_8086
+#define	BASE_SLAVE_MODE		ICW4_8086
+#endif
+
+/* Enable automatic EOI if requested. */
+#ifdef AUTO_EOI_1
+#define	MASTER_MODE		(BASE_MASTER_MODE | ICW4_AEOI)
+#else
+#define	MASTER_MODE		BASE_MASTER_MODE
+#endif
+#ifdef AUTO_EOI_2
+#define	SLAVE_MODE		(BASE_SLAVE_MODE | ICW4_AEOI)
+#else
+#define	SLAVE_MODE		BASE_SLAVE_MODE
+#endif
+
+#define	IRQ_MASK(irq)		(1 << (irq))
+#define	IMEN_MASK(ai)		(IRQ_MASK((ai)->at_irq))
+
 void	atpic_handle_intr(u_int vector, struct trapframe *frame);
 void	atpic_startup(void);
 
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