cpp-d1064d

[cross.git] / i686-linux-gnu-4.7 / usr / include / x86_64-linux-gnu / asm / e820.h

diff --git a/i686-linux-gnu-4.7/usr/include/x86_64-linux-gnu/asm/e820.h b/i686-linux-gnu-4.7/usr/include/x86_64-linux-gnu/asm/e820.h
new file mode 100644 (file)
index 0000000..b4bc4dc
--- /dev/null
+++ b/i686-linux-gnu-4.7/usr/include/x86_64-linux-gnu/asm/e820.h
@@ -0,0 +1,80 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _ASM_X86_E820_H
+#define _ASM_X86_E820_H
+#define E820MAP        0x2d0           /* our map */
+#define E820MAX        128             /* number of entries in E820MAP */
+
+/*
+ * Legacy E820 BIOS limits us to 128 (E820MAX) nodes due to the
+ * constrained space in the zeropage.  If we have more nodes than
+ * that, and if we've booted off EFI firmware, then the EFI tables
+ * passed us from the EFI firmware can list more nodes.  Size our
+ * internal memory map tables to have room for these additional
+ * nodes, based on up to three entries per node for which the
+ * kernel was built: MAX_NUMNODES == (1 << CONFIG_NODES_SHIFT),
+ * plus E820MAX, allowing space for the possible duplicate E820
+ * entries that might need room in the same arrays, prior to the
+ * call to sanitize_e820_map() to remove duplicates.  The allowance
+ * of three memory map entries per node is "enough" entries for
+ * the initial hardware platform motivating this mechanism to make
+ * use of additional EFI map entries.  Future platforms may want
+ * to allow more than three entries per node or otherwise refine
+ * this size.
+ */
+
+#define E820_X_MAX E820MAX
+
+#define E820NR 0x1e8           /* # entries in E820MAP */
+
+#define E820_RAM       1
+#define E820_RESERVED  2
+#define E820_ACPI      3
+#define E820_NVS       4
+#define E820_UNUSABLE  5
+#define E820_PMEM      7
+
+/*
+ * This is a non-standardized way to represent ADR or NVDIMM regions that
+ * persist over a reboot.  The kernel will ignore their special capabilities
+ * unless the CONFIG_X86_PMEM_LEGACY option is set.
+ *
+ * ( Note that older platforms also used 6 for the same type of memory,
+ *   but newer versions switched to 12 as 6 was assigned differently.  Some
+ *   time they will learn... )
+ */
+#define E820_PRAM      12
+
+/*
+ * reserved RAM used by kernel itself
+ * if CONFIG_INTEL_TXT is enabled, memory of this type will be
+ * included in the S3 integrity calculation and so should not include
+ * any memory that BIOS might alter over the S3 transition
+ */
+#define E820_RESERVED_KERN        128
+
+#ifndef __ASSEMBLY__
+#include <linux/types.h>
+struct e820entry {
+       __u64 addr;     /* start of memory segment */
+       __u64 size;     /* size of memory segment */
+       __u32 type;     /* type of memory segment */
+} __attribute__((packed));
+
+struct e820map {
+       __u32 nr_map;
+       struct e820entry map[E820_X_MAX];
+};
+
+#define ISA_START_ADDRESS      0xa0000
+#define ISA_END_ADDRESS                0x100000
+
+#define BIOS_BEGIN             0x000a0000
+#define BIOS_END               0x00100000
+
+#define BIOS_ROM_BASE          0xffe00000
+#define BIOS_ROM_END           0xffffffff
+
+#endif /* __ASSEMBLY__ */
+
+
+#endif /* _ASM_X86_E820_H */