1 files changed, 43 insertions, 0 deletions

diff --git a/arch/x86/include/asm/mca.h b/arch/x86/include/asm/mca.h
new file mode 100644
index 000000000000..60d1ed287b13
--- /dev/null
+++ b/arch/x86/include/asm/mca.h
@@ -0,0 +1,43 @@
+/* -*- mode: c; c-basic-offset: 8 -*- */
+
+/* Platform specific MCA defines */
+#ifndef ASM_X86__MCA_H
+#define ASM_X86__MCA_H
+
+/* Maximal number of MCA slots - actually, some machines have less, but
+ * they all have sufficient number of POS registers to cover 8.
+ */
+#define MCA_MAX_SLOT_NR  8
+
+/* Most machines have only one MCA bus.  The only multiple bus machines
+ * I know have at most two */
+#define MAX_MCA_BUSSES 2
+
+#define MCA_PRIMARY_BUS         0
+#define MCA_SECONDARY_BUS       1
+
+/* Dummy slot numbers on primary MCA for integrated functions */
+#define MCA_INTEGSCSI   (MCA_MAX_SLOT_NR)
+#define MCA_INTEGVIDEO  (MCA_MAX_SLOT_NR+1)
+#define MCA_MOTHERBOARD (MCA_MAX_SLOT_NR+2)
+
+/* Dummy POS values for integrated functions */
+#define MCA_DUMMY_POS_START     0x10000
+#define MCA_INTEGSCSI_POS       (MCA_DUMMY_POS_START+1)
+#define MCA_INTEGVIDEO_POS      (MCA_DUMMY_POS_START+2)
+#define MCA_MOTHERBOARD_POS     (MCA_DUMMY_POS_START+3)
+
+/* MCA registers */
+
+#define MCA_MOTHERBOARD_SETUP_REG       0x94
+#define MCA_ADAPTER_SETUP_REG           0x96
+#define MCA_POS_REG(n)                  (0x100+(n))
+
+#define MCA_ENABLED     0x01    /* POS 2, set if adapter enabled */
+
+/* Max number of adapters, including both slots and various integrated
+ * things.
+ */
+#define MCA_NUMADAPTERS (MCA_MAX_SLOT_NR+3)
+
+#endif /* ASM_X86__MCA_H */