[PATCH v3 1/4] x86/boot: Add acpitb.h to help parse acpi tables

From: Chao Fan <fanc.fnst@cn.fujitsu.com>
To: <linux-kernel@vger.kernel.org>, <x86@kernel.org>, <hpa@zytor.com>,
	<tglx@linutronix.de>, <mingo@redhat.com>, <bhe@redhat.com>,
	<keescook@chromium.org>, <yasu.isimatu@gmail.com>
Cc: <indou.takao@jp.fujitsu.com>, <lcapitulino@redhat.com>,
	<caoj.fnst@cn.fujitsu.com>, <douly.fnst@cn.fujitsu.com>,
	Chao Fan <fanc.fnst@cn.fujitsu.com>
Subject: [PATCH v3 1/4] x86/boot: Add acpitb.h to help parse acpi tables
Date: Tue, 17 Jul 2018 18:04:06 +0800	[thread overview]
Message-ID: <20180717100409.10547-2-fanc.fnst@cn.fujitsu.com> (raw)
In-Reply-To: <20180717100409.10547-1-fanc.fnst@cn.fujitsu.com>

In order to parse ACPI tables, reuse the head file linux/acpi.h,
so that the files in 'compressed' directory can read ACPI table
by including this head file.

Signed-off-by: Chao Fan <fanc.fnst@cn.fujitsu.com>
---
 arch/x86/boot/compressed/acpitb.h | 50 +++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 arch/x86/boot/compressed/acpitb.h

diff --git a/arch/x86/boot/compressed/acpitb.h b/arch/x86/boot/compressed/acpitb.h
new file mode 100644
index 000000000000..fd2bba23f447
--- /dev/null
+++ b/arch/x86/boot/compressed/acpitb.h
@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <linux/acpi.h>
+
+#define ACPI_MAX_TABLES                128
+
+/* Function to get ACPI SRAT table pointer. */
+struct acpi_table_header *get_acpi_srat_table(void);
+
+#ifdef ACPI_BIG_ENDIAN
+
+#define ACPI_MOVE_64_TO_64(d, s) \
+{((u8 *)(void *)(d))[0] = ((u8 *)(void *)(s))[7]; \
+((u8 *)(void *)(d))[1] = ((u8 *)(void *)(s))[6]; \
+((u8 *)(void *)(d))[2] = ((u8 *)(void *)(s))[5]; \
+((u8 *)(void *)(d))[3] = ((u8 *)(void *)(s))[4]; \
+((u8 *)(void *)(d))[4] = ((u8 *)(void *)(s))[3]; \
+((u8 *)(void *)(d))[5] = ((u8 *)(void *)(s))[2]; \
+((u8 *)(void *)(d))[6] = ((u8 *)(void *)(s))[1]; \
+((u8 *)(void *)(d))[7] = ((u8 *)(void *)(s))[0]; }
+
+#define ACPI_MOVE_16_TO_32(d, s) \
+{(*(u32 *)(void *)(d)) = 0; \
+((u8 *)(void *)(d))[2] = ((u8 *)(void *)(s))[1]; \
+((u8 *)(void *)(d))[3] = ((u8 *)(void *)(s))[0]; }
+
+#else
+#ifndef ACPI_MISALIGNMENT_NOT_SUPPORTED
+
+#define ACPI_MOVE_64_TO_64(d, s) \
+{*(u64 *)(void *)(d) = *(u64 *)(void *)(s); }
+
+#define ACPI_MOVE_16_TO_32(d, s) \
+{*(u32 *)(void *)(d) = *(u16 *)(void *)(s); }
+
+#else
+#define ACPI_MOVE_64_TO_64(d, s) \
+{((u8 *)(void *)(d))[0] = ((u8 *)(void *)(s))[0]; \
+((u8 *)(void *)(d))[1] = ((u8 *)(void *)(s))[1]; \
+((u8 *)(void *)(d))[2] = ((u8 *)(void *)(s))[2]; \
+((u8 *)(void *)(d))[3] = ((u8 *)(void *)(s))[3]; \
+((u8 *)(void *)(d))[4] = ((u8 *)(void *)(s))[4]; \
+((u8 *)(void *)(d))[5] = ((u8 *)(void *)(s))[5]; \
+((u8 *)(void *)(d))[6] = ((u8 *)(void *)(s))[6]; \
+((u8 *)(void *)(d))[7] = ((u8 *)(void *)(s))[7]; }
+
+#define ACPI_MOVE_16_TO_32(d, s) \
+{(*(u32 *)(void *)(d)) = 0; ACPI_MOVE_16_TO_16(d, s); }
+
+#endif
+#endif
-- 
2.17.1



