ACPI tables translator

Exposes x86 ACPI tables as a netfs on a mount point

* acpi: New directory.
* Makefile (prog-subdirs): Add acpi.
* hurd/hurd_types.h (FSTYPE_ACPI): New macro.

1 files changed, 74 insertions, 0 deletions

diff --git a/acpi/acpi.h b/acpi/acpi.h
new file mode 100644
index 00000000..7c21a442
--- /dev/null
+++ b/acpi/acpi.h
@@ -0,0 +1,74 @@
+/*
+   Copyright (C) 2018 Free Software Foundation, Inc.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with the GNU Hurd.  If not, see <<a rel="nofollow" href="http://www.gnu.org/licenses/">http://www.gnu.org/licenses/</a>>.
+*/
+
+/* ACPI tables basic structure */
+
+#ifndef ACPI_H
+#define ACPI_H
+
+#include <stdlib.h>
+#include <inttypes.h>
+
+/* PnP Extended System Configuration Data (ESCD) memory region */
+#define ESCD		0xe0000U
+#define  RSDP_MAGIC	(const unsigned char *)"RSD PTR "
+#define ESCD_SIZE	0x20000U
+
+struct rsdp_descr
+{
+  uint8_t magic[8];
+  uint8_t checksum;
+  uint8_t oem_id[6];
+  uint8_t revision;
+  uint32_t rsdt_addr;
+} __attribute__ ((packed));
+
+struct rsdp_descr2
+{
+  struct rsdp_descr v1;
+  uint32_t length;
+  uint64_t xsdt_addr;
+  uint8_t checksum;
+  uint8_t reserved[3];
+} __attribute__ ((packed));
+
+struct acpi_header
+{
+  uint8_t signature[4];
+  uint32_t length;
+  uint8_t revision;
+  uint8_t checksum;
+  uint8_t oem_id[6];
+  uint8_t oem_table_id[8];
+  uint32_t oem_revision;
+  uint32_t creator_id;
+  uint32_t creator_revision;
+} __attribute__ ((packed));
+
+struct acpi_table
+{
+  struct acpi_header h;
+  void *data;
+  size_t datalen;
+} __attribute__ ((packed));
+
+int acpi_get_num_tables(size_t *num_tables);
+int acpi_get_tables(struct acpi_table **tables);
+
+#endif /* ACPI_H */