kernel/acpi: Add basic ACPI Init logic

git-svn-id: https://svn.vegaa.systems/svn/vega-Vega/trunk@13 a8a8aea2-181d-ee11-89e8-15fd0e089fc4

1 files changed, 76 insertions, 0 deletions

diff --git a/sys/include/firmware/acpi/tables.h b/sys/include/firmware/acpi/tables.h
new file mode 100644
index 0000000..a504bef
--- /dev/null
+++ b/sys/include/firmware/acpi/tables.h
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2023 Ian Marco Moffett and the VegaOS team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of VegaOS nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* $Id$ */
+
+#ifndef _ACPI_TABLES_H_
+#define _ACPI_TABLES_H_
+
+#include <sys/types.h>
+#include <sys/cdefs.h>
+
+#define OEMID_SIZE 6
+
+struct __packed acpi_header {
+    uint32_t signature;         /* ASCII signature string */
+    uint32_t length;            /* Length of table in bytes */
+    uint8_t revision;           /* Revision of the structure */
+    uint8_t checksum;           /* Checksum of the header */
+    char oemid[OEMID_SIZE];     /* OEM-supplied string that IDs the OEM */
+    char oem_table_id[8];       /* OEM-supplied string (used by OEM) */
+    uint32_t oem_revision;      /* OEM-supplied revision number */
+    uint32_t creator_id;        /* Vendor ID of creator utility */
+    uint32_t creator_revision;  /* Revision of creator utility */
+};
+
+struct __packed acpi_rsdp {
+    uint64_t signature;         /* RSD PTR */
+    uint8_t checksum;           /* Structure checksum */
+    char oemid[OEMID_SIZE];     /* OEM-supplied string that IDs the OEM */
+    uint8_t revision;           /* Revision of the structure */ 
+    uint32_t rsdt_addr;         /* RSDT physical address */
+
+    /* Reserved if revision < 2 */
+    uint32_t length;            /* Length of table in bytes */
+    uint64_t xsdt_addr;         /* XSDT physical address */
+    uint8_t ext_checksum;       /* Extended checksum */
+    uint8_t reserved[3];
+};
+
+/* 
+ * XSDT or RSDT depending
+ * on what revision the header
+ * says.
+ */
+struct __packed acpi_root_sdt {
+    struct acpi_header hdr;
+    void *entries;              /* 8*n */
+};
+
+#endif      /* !_ACPI_TABLES_H_ */