xref: /openbmc/linux/arch/powerpc/boot/redboot.h (revision b2441318)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _PPC_REDBOOT_H
3 #define _PPC_REDBOOT_H
4 
5 //=========================================================================
6 // include/asm-ppc/redboot.h
7 //   Copyright (c) 2002, 2003 Gary Thomas (<gary@mlbassoc.com>
8 //   Copyright (c) 1997 Dan Malek (dmalek@jlc.net)
9 
10 //
11 // Board specific details, as provided by RedBoot
12 //
13 
14 /* A Board Information structure that is given to a program when
15  * RedBoot starts it up.  Note: not all fields make sense for all
16  * architectures and it's up to the platform specific code to fill
17  * in the details.
18  */
19 typedef struct bd_info {
20     unsigned int   bi_tag;        /* Should be 0x42444944 "BDID" */
21     unsigned int   bi_size;       /* Size of this structure */
22     unsigned int   bi_revision;   /* revision of this structure */
23     unsigned int   bi_bdate;      /* bootstrap date, i.e. 0x19971106 */
24     unsigned int   bi_memstart;   /* Memory start address */
25     unsigned int   bi_memsize;    /* Memory (end) size in bytes */
26     unsigned int   bi_intfreq;    /* Internal Freq, in Hz */
27     unsigned int   bi_busfreq;    /* Bus Freq, in Hz */
28     unsigned int   bi_cpmfreq;    /* CPM Freq, in Hz */
29     unsigned int   bi_brgfreq;    /* BRG Freq, in Hz */
30     unsigned int   bi_vco;        /* VCO Out from PLL */
31     unsigned int   bi_pci_freq;   /* PCI Freq, in Hz */
32     unsigned int   bi_baudrate;   /* Default console baud rate */
33     unsigned int   bi_immr;       /* IMMR when called from boot rom */
34     unsigned char  bi_enetaddr[6];
35     unsigned int   bi_flashbase;  /* Physical address of FLASH memory */
36     unsigned int   bi_flashsize;  /* Length of FLASH memory */
37     int            bi_flashwidth; /* Width (8,16,32,64) */
38     unsigned char *bi_cmdline;    /* Pointer to command line */
39     unsigned char  bi_esa[3][6];  /* Ethernet station addresses */
40     unsigned int   bi_ramdisk_begin, bi_ramdisk_end;
41     struct {                      /* Information about [main] video screen */
42         short x_res;              /*   Horizontal resolution in pixels */
43         short y_res;              /*   Vertical resolution in pixels */
44         short bpp;                /*   Bits/pixel */
45         short mode;               /*   Type of pixels (packed, indexed) */
46         unsigned long fb;         /*   Pointer to frame buffer (pixel) memory */
47     } bi_video;
48     void         (*bi_cputc)(char);   /* Write a character to the RedBoot console */
49     char         (*bi_cgetc)(void);   /* Read a character from the RedBoot console */
50     int          (*bi_ctstc)(void);   /* Test for input on the RedBoot console */
51 } bd_t;
52 
53 #define BI_REV 0x0102    /* Version 1.02 */
54 
55 #define bi_pci_busfreq bi_pci_freq
56 #define bi_immr_base   bi_immr
57 #endif
58