--- /dev/null
+/*
+ * LinuxBIOS ACPI Table support
+ * written by Stefan Reinauer <stepan@openbios.org>
+ * (C) 2004 SUSE LINUX AG
+ */
+
+#include <console/console.h>
+#include <string.h>
+#include <arch/acpi.h>
+
+#define RSDP_SIG "RSD PTR " /* RSDT Pointer signature */
+#define RSDP_NAME "RSDP"
+
+#define RSDT_NAME "RSDT"
+#define HPET_NAME "HPET"
+#define RSDT_TABLE " RSDT "
+#define HPET_TABLE "AMD64 "
+
+#define OEM_ID "LXBIOS"
+#define ASLC "NONE"
+
+static u8 acpi_checksum(u8 *table, u32 length)
+{
+ u8 ret=0;
+ while (length--) {
+ ret += *table;
+ table++;
+ }
+ return ret;
+}
+
+static void acpi_add_table(acpi_rsdt_t *rsdt, void *table)
+{
+ int i;
+
+ for (i=0; i<8; i++) {
+ if(rsdt->entry[i]==0) {
+ rsdt->entry[i]=(u32)table;
+ /* fix checksum */
+ /* hope this won't get optimized away */
+ rsdt->header.checksum=0;
+ rsdt->header.checksum=acpi_checksum((u8 *)rsdt,
+ rsdt->header.length);
+
+ printk_debug("ACPI: added table %d/8\n",i);
+ return;
+ }
+ }
+
+ printk_warning("ACPI: could not ACPI table. failed.\n");
+}
+
+static void acpi_create_hpet(acpi_hpet_t *hpet)
+{
+#define HPET_ADDR 0xfed00000ULL
+ acpi_header_t *header=&(hpet->header);
+ acpi_addr_t *addr=&(hpet->addr);
+
+ /* fill out header fields */
+ memcpy(header->signature, HPET_NAME, 4);
+ memcpy(header->oem_id, OEM_ID, 6);
+ memcpy(header->oem_table_id, HPET_TABLE, 8);
+ memcpy(header->asl_compiler_id, ASLC, 4);
+
+ header->length = sizeof(acpi_hpet_t);
+ header->revision = 1;
+
+ /* fill out HPET address */
+ addr->space_id = 0; /* Memory */
+ addr->bit_width = 64;
+ addr->bit_offset = 0;
+ addr->addrl = HPET_ADDR & 0xffffffff;
+ addr->addrh = HPET_ADDR >> 32;
+
+ hpet->id = 0x102282a0; /* AMD ? */
+ hpet->number = 0;
+ hpet->min_tick = 4096;
+
+}
+
+static void acpi_write_rsdt(acpi_rsdt_t *rsdt)
+{
+ acpi_header_t *header=&(rsdt->header);
+
+ /* fill out header fields */
+ memcpy(header->signature, RSDT_NAME, 4);
+ memcpy(header->oem_id, OEM_ID, 6);
+ memcpy(header->oem_table_id, RSDT_TABLE, 8);
+ memcpy(header->asl_compiler_id, ASLC, 4);
+
+ header->length = sizeof(acpi_rsdt_t);
+ header->revision = 1;
+
+ /* fill out entries */
+
+ // entries are filled in later, we come with an empty set.
+
+ /* fix checksum */
+
+ header->checksum = acpi_checksum((void *)rsdt, sizeof(acpi_rsdt_t));
+}
+
+static void acpi_write_rsdp(acpi_rsdp_t *rsdp, acpi_rsdt_t *rsdt)
+{
+ memcpy(rsdp->signature, RSDP_SIG, 8);
+ memcpy(rsdp->oem_id, OEM_ID, 6);
+
+ rsdp->length = sizeof(acpi_rsdp_t);
+ rsdp->rsdt_address = (u32)rsdt;
+ rsdp->checksum = acpi_checksum((void *)rsdp, sizeof(acpi_rsdp_t));
+
+}
+
+unsigned long write_acpi_tables(unsigned long start)
+{
+ unsigned long current = start;
+ acpi_rsdp_t *rsdp;
+ acpi_rsdt_t *rsdt;
+ acpi_hpet_t *hpet;
+
+ printk_info("ACPI: Writing ACPI tables at %lx...\n", start);
+
+ /* We need at least an RSDP and an RSDT Table */
+ rsdp = (acpi_rsdp_t *) current;
+ current += sizeof(acpi_rsdp_t);
+ rsdt = (acpi_rsdt_t *) current;
+ current += sizeof(acpi_rsdt_t);
+
+ /* clear all table memory */
+ memset((void *)start, 0, current - start);
+
+ acpi_write_rsdp(rsdp, rsdt);
+ acpi_write_rsdt(rsdt);
+
+ /*
+ * We explicitly add these tables later on:
+ */
+#define HAVE_ACPI_HPET
+#ifdef HAVE_ACPI_HPET
+ printk_debug("ACPI: * HPET\n");
+
+ hpet = (acpi_hpet_t *) current;
+ current += sizeof(acpi_hpet_t);
+
+ acpi_create_hpet(hpet);
+ acpi_add_table(rsdt,hpet);
+#endif
+ printk_info("ACPI: done.\n");
+ return current;
+}
+
--- /dev/null
+/*
+ * Initial LinuxBIOS ACPI Support - headers and defines.
+ *
+ * written by Stefan Reinauer <stepan@openbios.org>
+ * (C) 2004 SUSE LINUX AG
+ *
+ * The ACPI table structs are based on the Linux kernel sources.
+ *
+ */
+
+
+#ifndef __ASM_ACPI_H
+#define __ASM_ACPI_H
+
+#if HAVE_ACPI_TABLES==1
+
+typedef unsigned char u8;
+typedef unsigned short u16;
+typedef unsigned int u32;
+typedef unsigned long long u64;
+
+#define RSDP_NAME "RSDP"
+#define RSDP_SIG "RSD PTR " /* RSDT Pointer signature */
+
+/* ACPI 2.0 table RSDP */
+
+typedef struct acpi_rsdp {
+ char signature[8];
+ u8 checksum;
+ char oem_id[6];
+ u8 revision;
+ u32 rsdt_address;
+ u32 length;
+ u64 xsdt_address;
+ u8 ext_checksum;
+ u8 reserved[3];
+} __attribute__((packed)) acpi_rsdp_t;
+
+/* Generic Address Container */
+
+typedef struct acpi_gen_regaddr {
+ u8 space_id;
+ u8 bit_width;
+ u8 bit_offset;
+ u8 resv;
+ u32 addrl;
+ u32 addrh;
+} __attribute__ ((packed)) acpi_addr_t;
+
+/* Generic ACPI Header, provided by (almost) all tables */
+
+typedef struct acpi_table_header /* ACPI common table header */
+{
+ char signature [4]; /* ACPI signature (4 ASCII characters) */\
+ u32 length; /* Length of table, in bytes, including header */\
+ u8 revision; /* ACPI Specification minor version # */\
+ u8 checksum; /* To make sum of entire table == 0 */\
+ char oem_id [6]; /* OEM identification */\
+ char oem_table_id [8]; /* OEM table identification */\
+ u32 oem_revision; /* OEM revision number */\
+ char asl_compiler_id [4]; /* ASL compiler vendor ID */\
+ u32 asl_compiler_revision; /* ASL compiler revision number */
+} __attribute__ ((packed)) acpi_header_t;
+
+/* RSDT */
+
+typedef struct acpi_rsdt {
+ struct acpi_table_header header;
+ u32 entry[8];
+} __attribute__ ((packed)) acpi_rsdt_t;
+
+/* HPET TIMERS */
+
+typedef struct acpi_hpet {
+ struct acpi_table_header header;
+ u32 id;
+ struct acpi_gen_regaddr addr;
+ u8 number;
+ u16 min_tick;
+ u8 attributes;
+} __attribute__ ((packed)) acpi_hpet_t;
+
+
+unsigned long write_acpi_tables(unsigned long addr);
+
+#else // HAVE_ACPI_TABLES
+
+#define write_acpi_tables(start) (start)
+
+#endif
+
+#endif
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