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  * Physical address of memory base for VxWorks x86
  13  * This is LOCAL_MEM_LOCAL_ADRS in the VxWorks kernel configuration.
  14  */
  15 #define VXWORKS_PHYS_MEM_BASE   0x100000
  16
  17 /*
  18  * VxWorks x86 E820 related stuff
  19  *
  20  * VxWorks on x86 gets E820 information from pre-defined offset @
  21  * 0x4a00 and 0x4000. At 0x4a00 it's an information table defined
  22  * by VxWorks and the actual E820 table entries starts from 0x4000.
  23  * As defined by the BIOS E820 spec, the maximum number of E820 table
  24  * entries is 128 and each entry occupies 20 bytes, so it's 128 * 20
  25  * = 2560 (0xa00) bytes in total. That's where VxWorks stores some
  26  * information that is retrieved from the BIOS E820 call and saved
  27  * later for sanity test during the kernel boot-up.
  28  */
  29 #define E820_DATA_OFFSET        0x4000
  30 #define E820_INFO_OFFSET        0x4a00
  31
  32 /* E820 info signatiure "SMAP" - System MAP */
  33 #define E820_SIGNATURE  0x534d4150
  34
  35 struct e820info {
  36         u32 sign;       /* "SMAP" signature */
  37         u32 x0;         /* don't care, used by VxWorks */
  38         u32 x1;         /* don't care, used by VxWorks */
  39         u32 x2;         /* don't care, used by VxWorks */
  40         u32 addr;       /* last e820 table entry addr */
  41         u32 x3;         /* don't care, used by VxWorks */
  42         u32 entries;    /* e820 table entry count */
  43         u32 error;      /* must be zero */
  44 };
  45
  46 /*
  47  * VxWorks bootloader stores its size at a pre-defined offset @ 0x5004.
  48  * Later when VxWorks kernel boots up and system memory information is
  49  * retrieved from the E820 table, the bootloader size will be subtracted
  50  * from the total system memory size to calculate the size of available
  51  * memory for the OS.
  52  */
  53 #define BOOT_IMAGE_SIZE_OFFSET  0x5004
  54
  55 int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
  56 void boot_prep_vxworks(bootm_headers_t *images);
  57 void boot_jump_vxworks(bootm_headers_t *images);
  58 void do_bootvx_fdt(bootm_headers_t *images);
  59
  60 #endif