include/vxworks.h

   1 /*
   2  * (C) Copyright 2008
   3  * Niklaus Giger, niklaus.giger@member.fsf.org
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #ifndef _VXWORKS_H_
   9 #define _VXWORKS_H_
  10
  11 /*
  12  * VxWorks x86 E820 related stuff
  13  *
  14  * VxWorks on x86 gets E820 information from pre-defined address @
  15  * 0x4a00 and 0x4000. At 0x4a00 it's an information table defined
  16  * by VxWorks and the actual E820 table entries starts from 0x4000.
  17  * As defined by the BIOS E820 spec, the maximum number of E820 table
  18  * entries is 128 and each entry occupies 20 bytes, so it's 128 * 20
  19  * = 2560 (0xa00) bytes in total. That's where VxWorks stores some
  20  * information that is retrieved from the BIOS E820 call and saved
  21  * later for sanity test during the kernel boot-up.
  22  */
  23 #define VXWORKS_E820_DATA_ADDR  0x4000
  24 #define VXWORKS_E820_INFO_ADDR  0x4a00
  25
  26 /* E820 info signatiure "SMAP" - System MAP */
  27 #define E820_SIGNATURE  0x534d4150
  28
  29 struct e820info {
  30         u32 sign;       /* "SMAP" signature */
  31         u32 x0;         /* don't care, used by VxWorks */
  32         u32 x1;         /* don't care, used by VxWorks */
  33         u32 x2;         /* don't care, used by VxWorks */
  34         u32 addr;       /* last e820 table entry addr */
  35         u32 x3;         /* don't care, used by VxWorks */
  36         u32 entries;    /* e820 table entry count */
  37         u32 error;      /* must be zero */
  38 };
  39
  40 int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
  41 void boot_prep_vxworks(bootm_headers_t *images);
  42 void boot_jump_vxworks(bootm_headers_t *images);
  43 void do_bootvx_fdt(bootm_headers_t *images);
  44
  45 #endif