/*
 * tboot.h: shared data structure with MLE and kernel and functions
 *          used by kernel for runtime support
 *
 * Copyright (c) 2006-2007, Intel Corporation
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * 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.
 *   * Neither the name of the Intel Corporation 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.
 *
 */

#ifndef ASM__X86__TBOOT_H
#define ASM__X86__TBOOT_H

#include <xen/acpi.h>

typedef struct __packed {
  uint32_t    data1;
  uint16_t    data2;
  uint16_t    data3;
  uint16_t    data4;
  uint8_t     data5[6];
} uuid_t;

/* used to communicate between tboot and the launched kernel (i.e. Xen) */

#define TB_KEY_SIZE             64   /* 512 bits */

#define MAX_TB_MAC_REGIONS      32
typedef struct __packed {
    uint64_t  start;         /* must be 64 byte -aligned */
    uint32_t  size;          /* must be 64 byte -granular */
} tboot_mac_region_t;

/* GAS - Generic Address Structure (ACPI 2.0+) */
typedef struct __packed {
	uint8_t  space_id;
	uint8_t  bit_width;
	uint8_t  bit_offset;
	uint8_t  access_width;
	uint64_t address;
} tboot_acpi_generic_address_t;

typedef struct __packed {
    tboot_acpi_generic_address_t pm1a_cnt_blk;
    tboot_acpi_generic_address_t pm1b_cnt_blk;
    tboot_acpi_generic_address_t pm1a_evt_blk;
    tboot_acpi_generic_address_t pm1b_evt_blk;
    uint16_t pm1a_cnt_val;
    uint16_t pm1b_cnt_val;
    uint64_t wakeup_vector;
    uint32_t vector_width;
    uint64_t kernel_s3_resume_vector;
} tboot_acpi_sleep_info_t;

typedef struct __packed {
    /* version 3+ fields: */
    uuid_t    uuid;              /* {663C8DFF-E8B3-4b82-AABF-19EA4D057A08} */
    uint32_t  version;           /* Version number; currently supports 0.6 */
    uint32_t  log_addr;          /* physical addr of tb_log_t log */
    uint32_t  shutdown_entry;    /* entry point for tboot shutdown */
    uint32_t  shutdown_type;     /* type of shutdown (TB_SHUTDOWN_*) */
    tboot_acpi_sleep_info_t
              acpi_sinfo;        /* where kernel put acpi sleep info in Sx */
    uint32_t  tboot_base;        /* starting addr for tboot */
    uint32_t  tboot_size;        /* size of tboot */
    uint8_t   num_mac_regions;   /* number mem regions to MAC on S3 */
                                 /* contig regions memory to MAC on S3 */
    tboot_mac_region_t mac_regions[MAX_TB_MAC_REGIONS];
    /* version 4+ fields: */
                                 /* populated by tboot; will be encrypted */
    uint8_t   s3_key[TB_KEY_SIZE];
    /* version 5+ fields: */
    uint8_t   reserved_align[3]; /* used to 4byte-align num_in_wfs */
    uint32_t  num_in_wfs;        /* number of processors in wait-for-SIPI */
    /* version 6+ fields: */
    uint32_t  flags;
    uint64_t  ap_wake_addr;      /* phys addr of kernel/VMM SIPI vector */
    uint32_t  ap_wake_trigger;   /* kernel/VMM writes APIC ID to wake AP */
} tboot_shared_t;

#define TB_SHUTDOWN_REBOOT      0
#define TB_SHUTDOWN_S5          1
#define TB_SHUTDOWN_S4          2
#define TB_SHUTDOWN_S3          3
#define TB_SHUTDOWN_HALT        4

#define TB_FLAG_AP_WAKE_SUPPORT   0x00000001  /* kernel/VMM use INIT-SIPI-SIPI
                                                 if clear, ap_wake_* if set */

/* {663C8DFF-E8B3-4b82-AABF-19EA4D057A08} */
#define TBOOT_SHARED_UUID    { 0x663c8dff, 0xe8b3, 0x4b82, 0xaabf, \
                               { 0x19, 0xea, 0x4d, 0x5, 0x7a, 0x8 } };

extern tboot_shared_t *g_tboot_shared;

#ifdef CONFIG_TBOOT
void tboot_probe(void);
void tboot_shutdown(uint32_t shutdown_type);
int tboot_in_measured_env(void);
int tboot_protect_mem_regions(void);
int cf_check tboot_parse_dmar_table(acpi_table_handler dmar_handler);
int tboot_s3_resume(void);
void tboot_s3_error(int error);
int tboot_wake_ap(int apicid, unsigned long sipi_vec);
#else
static inline void tboot_probe(void) {}
static inline void tboot_shutdown(uint32_t shutdown_type) {}
static inline int tboot_in_measured_env(void) { return 0; }
static inline int tboot_protect_mem_regions(void) { return 1; }

static inline int tboot_parse_dmar_table(acpi_table_handler dmar_handler)
{
    return acpi_table_parse(ACPI_SIG_DMAR, dmar_handler);
}

static inline int tboot_s3_resume(void) { return 0; }
static inline void tboot_s3_error(int error) {}
static inline int tboot_wake_ap(int apicid, unsigned long sipi_vec)
{
    return 1;
}
#endif /* CONFIG_TBOOT */

#endif /* ASM__X86__TBOOT_H */

/*
 * Local variables:
 * mode: C
 * c-file-style: "BSD"
 * c-basic-offset: 4
 * tab-width: 4
 * indent-tabs-mode: nil
 * End:
 */
