x86: quark: Introduce ACPI global NVS

This introduces quark-specific ACPI global NVS structure, defined in
both C header file and ASL file.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/arch/x86/cpu/quark/acpi.c b/arch/x86/cpu/quark/acpi.c
index 8f69829..3968f7a 100644 (file)
--- a/arch/x86/cpu/quark/acpi.c
+++ b/arch/x86/cpu/quark/acpi.c
@@ -9,6 +9,7 @@
 #include <asm/ioapic.h>
 #include <asm/mpspec.h>
 #include <asm/tables.h>
+#include <asm/arch/global_nvs.h>
 #include <asm/arch/iomap.h>
 
 void acpi_create_fadt(struct acpi_fadt *fadt, struct acpi_facs *facs,
@@ -161,3 +162,9 @@ u32 acpi_fill_madt(u32 current)
 
        return current;
 }
+
+void acpi_create_gnvs(struct acpi_global_nvs *gnvs)
+{
+       /* quark is a uni-processor */
+       gnvs->pcnt = 1;
+}

diff --git a/arch/x86/include/asm/arch-quark/acpi/global_nvs.asl b/arch/x86/include/asm/arch-quark/acpi/global_nvs.asl
new file mode 100644 (file)
index 0000000..6f0435e
--- /dev/null
+++ b/arch/x86/include/asm/arch-quark/acpi/global_nvs.asl
@@ -0,0 +1,14 @@
+/*
+ * Copyright (C) 2016 Bin Meng <bmeng.cn@gmail.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <asm/acpi/global_nvs.h>
+
+OperationRegion(GNVS, SystemMemory, ACPI_GNVS_ADDR, ACPI_GNVS_SIZE)
+Field(GNVS, ByteAcc, NoLock, Preserve)
+{
+       Offset (0x00),
+       PCNT, 8,        /* processor count */
+}

diff --git a/arch/x86/include/asm/arch-quark/global_nvs.h b/arch/x86/include/asm/arch-quark/global_nvs.h
new file mode 100644 (file)
index 0000000..0231da0
--- /dev/null
+++ b/arch/x86/include/asm/arch-quark/global_nvs.h
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#ifndef _GLOBAL_NVS_H_
+#define _GLOBAL_NVS_H_
+
+struct __packed acpi_global_nvs {
+       u8      pcnt;           /* processor count */
+
+       /*
+        * Add padding so sizeof(struct acpi_global_nvs) == 0x100.
+        * This must match the size defined in the global_nvs.asl.
+        */
+       u8      rsvd[255];
+};
+
+#endif /* _GLOBAL_NVS_H_ */