xref: /freebsd-10-stable/sys/contrib/octeon-sdk/cvmx-bootloader.h

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#ifndef __CVMX_BOOTLOADER__
#define __CVMX_BOOTLOADER__



/**
 * @file
 *
 * Bootloader definitions that are shared with other programs
 *
 * <hr>$Revision: 70030 $<hr>
 */


/* The bootloader_header_t structure defines the header that is present
** at the start of binary u-boot images.  This header is used to locate the bootloader
** image in NAND, and also to allow verification of images for normal NOR booting.
** This structure is placed at the beginning of a bootloader binary image, and remains
** in the executable code.
*/
#define BOOTLOADER_HEADER_MAGIC 0x424f4f54  /* "BOOT" in ASCII */

#define BOOTLOADER_HEADER_COMMENT_LEN  64
#define BOOTLOADER_HEADER_VERSION_LEN  64
#define BOOTLOADER_HEADER_MAX_SIZE      0x200 /* limited by the space to the next exception handler */

#define BOOTLOADER_HEADER_CURRENT_MAJOR_REV 1
#define BOOTLOADER_HEADER_CURRENT_MINOR_REV 2
/* Revision history
* 1.1  Initial released revision. (SDK 1.9)
* 1.2  TLB based relocatable image (SDK 2.0)
*
*
*/

/* offsets to struct bootloader_header fields for assembly use */
#define GOT_ADDRESS_OFFSET       48

#define LOOKUP_STEP (64*1024)

#ifndef __ASSEMBLY__
typedef struct bootloader_header
{
    uint32_t    jump_instr; /* Jump to executable code following the
                            ** header.  This allows this header to
                            ** be (and remain) part of the executable image)
                            */
    uint32_t    nop_instr;  /* Must be 0x0 */
    uint32_t    magic; /* Magic number to identify header */
    uint32_t    hcrc;  /* CRC of all of header excluding this field */

    uint16_t    hlen;  /* Length of header in bytes */
    uint16_t    maj_rev;  /* Major revision */
    uint16_t    min_rev;  /* Minor revision */
    uint16_t    board_type;  /* Board type that the image is for */

    uint32_t    dlen;  /* Length of data (immediately following header) in bytes */
    uint32_t    dcrc;  /* CRC of data */
    uint64_t    address;  /* Mips virtual address */
    uint32_t    flags;
    uint16_t    image_type;  /* Defined in bootloader_image_t enum */
    uint16_t    resv0;       /* pad */

    uint32_t    reserved1;
    uint32_t    reserved2;
    uint32_t    reserved3;
    uint32_t    reserved4;

    char        comment_string[BOOTLOADER_HEADER_COMMENT_LEN];  /* Optional, for descriptive purposes */
    char        version_string[BOOTLOADER_HEADER_VERSION_LEN];  /* Optional, for descriptive purposes */
} __attribute__((packed)) bootloader_header_t;



/* Defines for flag field */
#define BL_HEADER_FLAG_FAILSAFE         (1)


typedef enum
{
    BL_HEADER_IMAGE_UNKNOWN = 0x0,
    BL_HEADER_IMAGE_STAGE2,  /* Binary bootloader stage2 image (NAND boot) */
    BL_HEADER_IMAGE_STAGE3,  /* Binary bootloader stage3 image (NAND boot)*/
    BL_HEADER_IMAGE_NOR,     /* Binary bootloader for NOR boot */
    BL_HEADER_IMAGE_PCIBOOT,     /* Binary bootloader for PCI boot */
    BL_HEADER_IMAGE_UBOOT_ENV,  /* Environment for u-boot */
    BL_HEADER_IMAGE_MAX,
    /* Range for customer private use.  Will not be used by Cavium Inc. */
    BL_HEADER_IMAGE_CUST_RESERVED_MIN = 0x1000,
    BL_HEADER_IMAGE_CUST_RESERVED_MAX = 0x1fff
} bootloader_image_t;

#endif /* __ASSEMBLY__ */

/* Maximum address searched for NAND boot images and environments.  This is used
** by stage1 and stage2. */
#define MAX_NAND_SEARCH_ADDR   0x400000

/* Maximum address to look for start of normal bootloader */
#define MAX_NOR_SEARCH_ADDR   0x200000

/* Defines for RAM based environment set by the host or the previous bootloader
** in a chain boot configuration. */

#define U_BOOT_RAM_ENV_ADDR     (0x1000)
#define U_BOOT_RAM_ENV_SIZE     (0x1000)
#define U_BOOT_RAM_ENV_CRC_SIZE (0x4)
#define U_BOOT_RAM_ENV_ADDR_2	(U_BOOT_RAM_ENV_ADDR + U_BOOT_RAM_ENV_SIZE)

#endif /* __CVMX_BOOTLOADER__ */