src/include/btext.h

   1 /*
   2  * This file describes the structure passed from the BootX application
   3  * (for MacOS) when it is used to boot Linux.
   4  *
   5  * Written by Benjamin Herrenschmidt.
   6  *
   7  * Move to LinuxBIOS by LYH  yhlu@tyan.com
   8  *
   9  */
  10
  11
  12 #ifndef _BTEXT_H__
  13 #define _BTEXT_H__
  14
  15 #if 1
  16 #define u32 unsigned int
  17 #define u16 unsigned short
  18 #define u8 unsigned char
  19 #endif
  20
  21 /* Here are the boot informations that are passed to the bootstrap
  22  * Note that the kernel arguments and the device tree are appended
  23  * at the end of this structure. */
  24 typedef struct boot_infos
  25 {
  26
  27     /* NEW (vers. 2) this holds the current _logical_ base addr of
  28        the frame buffer (for use by early boot message) */
  29     u8*       logicalDisplayBase;
  30
  31
  32     /* Some infos about the current MacOS display */
  33     u32       dispDeviceRect[4];       /* left,top,right,bottom */
  34     u32       dispDeviceDepth;         /* (8, 16 or 32) */
  35     u32       dispDeviceBase;          /* base address (physical) */
  36     u32       dispDeviceRowBytes;      /* rowbytes (in bytes) */
  37     u32       dispDeviceColorsOffset;  /* Colormap (8 bits only) or 0 (*) */
  38
  39
  40     /* The framebuffer size (optional, currently 0) */
  41     u32       frameBufferSize;         /* Represents a max size, can be 0. */
  42
  43
  44 } boot_infos_t;
  45
  46 /* (*) The format of the colormap is 256 * 3 * 2 bytes. Each color index is represented
  47  * by 3 short words containing a 16 bits (unsigned) color component.
  48  * Later versions may contain the gamma table for direct-color devices here.
  49  */
  50 #define BOOTX_COLORTABLE_SIZE    (256UL*3UL*2UL)
  51
  52
  53 /*
  54  * Definitions for using the procedures in btext.c.
  55  *
  56  * Benjamin Herrenschmidt <benh@kernel.crashing.org>
  57  */
  58
  59 extern boot_infos_t disp_bi;
  60 extern u32 boot_text_mapped;
  61
  62 #endif /* _BTEXT_H */