This adds pirq_reg_to_linkno() and pirq_linkno_to_reg() for IvyBridge.
Signed-off-by: Bin Meng <bmeng...@gmail.com>
---
arch/x86/cpu/ivybridge/Kconfig | 4 +++
arch/x86/include/asm/arch-ivybridge/irq.h | 45 +++++++++++++++++++++++++++++++
2 files changed, 49 insertions(+)
create mode 100644 arch/x86/include/asm/arch-ivybridge/irq.h
diff --git a/arch/x86/cpu/ivybridge/Kconfig b/arch/x86/cpu/ivybridge/Kconfig
index eec92df..e31c33c 100644
--- a/arch/x86/cpu/ivybridge/Kconfig
+++ b/arch/x86/cpu/ivybridge/Kconfig
@@ -58,6 +58,10 @@ config ENABLE_VMX
will be unable to support virtualisation, or it will run very
slowly.
+config DISCRETE_PIRQ_ROUT
+ bool
+ default y
+
config FSP_ADDR
hex
default 0xfff80000
diff --git a/arch/x86/include/asm/arch-ivybridge/irq.h
b/arch/x86/include/asm/arch-ivybridge/irq.h
new file mode 100644
index 0000000..d8ddf55
--- /dev/null
+++ b/arch/x86/include/asm/arch-ivybridge/irq.h
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2018, Bin Meng <bmeng...@gmail.com>
+ *
+ * IvyBridge specific IRQ converting logic
+ */
+
+#ifndef _IVYBRIDGE_IRQ_H_
+#define _IVYBRIDGE_IRQ_H_
+
+/**
+ * pirq_reg_to_linkno() - Convert a PIRQ routing register offset to link number
+ *
+ * @reg: PIRQ routing register offset from the base address
+ * @base: PIRQ routing register block base address
+ * @return: PIRQ link number (0 for PIRQA, 1 for PIRQB, etc)
+ */
+static inline int pirq_reg_to_linkno(int reg, int base)
+{
+ int linkno = reg - base;
+
+ if (linkno > PIRQH)
+ linkno -= 4;
+
+ return linkno;
+}
+
+/**
+ * pirq_linkno_to_reg() - Convert a PIRQ link number to routing register offset
+ *
+ * @linkno: PIRQ link number (0 for PIRQA, 1 for PIRQB, etc)
+ * @base: PIRQ routing register block base address
+ * @return: PIRQ routing register offset from the base address
+ */
+static inline int pirq_linkno_to_reg(int linkno, int base)
+{
+ int reg = linkno + base;
+
+ if (linkno > PIRQD)
+ reg += 4;
+
+ return reg;
+}
+
+#endif /* _IVYBRIDGE_IRQ_H_ */
--
2.7.4
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