summaryrefslogtreecommitdiff
path: root/arch/powerpc/include/asm/bootx.h
blob: 60a3c9ef3017818897ac689d43c3db2b35e7eac9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
/*
 * This file describes the structure passed from the BootX application
 * (for MacOS) when it is used to boot Linux.
 *
 * Written by Benjamin Herrenschmidt.
 */


#ifndef __ASM_BOOTX_H__
#define __ASM_BOOTX_H__

#include <linux/types.h>

#ifdef macintosh
#include <Types.h>
#include "linux_type_defs.h"
#endif

#ifdef macintosh
/* All this requires PowerPC alignment */
#pragma options align=power
#endif

/* On kernel entry:
 *
 * r3 = 0x426f6f58    ('BooX')
 * r4 = pointer to boot_infos
 * r5 = NULL
 *
 * Data and instruction translation disabled, interrupts
 * disabled, kernel loaded at physical 0x00000000 on PCI
 * machines (will be different on NuBus).
 */

#define BOOT_INFO_VERSION               5
#define BOOT_INFO_COMPATIBLE_VERSION    1

/* Bit in the architecture flag mask. More to be defined in
   future versions. Note that either BOOT_ARCH_PCI or
   BOOT_ARCH_NUBUS is set. The other BOOT_ARCH_NUBUS_xxx are
   set additionally when BOOT_ARCH_NUBUS is set.
 */
#define BOOT_ARCH_PCI                   0x00000001UL
#define BOOT_ARCH_NUBUS                 0x00000002UL
#define BOOT_ARCH_NUBUS_PDM             0x00000010UL
#define BOOT_ARCH_NUBUS_PERFORMA        0x00000020UL
#define BOOT_ARCH_NUBUS_POWERBOOK       0x00000040UL

/*  Maximum number of ranges in phys memory map */
#define MAX_MEM_MAP_SIZE				26

/* This is the format of an element in the physical memory map. Note that
   the map is optional and current BootX will only build it for pre-PCI
   machines */
typedef struct boot_info_map_entry
{
    __u32       physAddr;                /* Physical starting address */
    __u32       size;                    /* Size in bytes */
} boot_info_map_entry_t;


/* Here are the boot informations that are passed to the bootstrap
 * Note that the kernel arguments and the device tree are appended
 * at the end of this structure. */
typedef struct boot_infos
{
    /* Version of this structure */
    __u32       version;
    /* backward compatible down to version: */
    __u32       compatible_version;

    /* NEW (vers. 2) this holds the current _logical_ base addr of
       the frame buffer (for use by early boot message) */
    __u8*       logicalDisplayBase;

    /* NEW (vers. 4) Apple's machine identification */
    __u32       machineID;

    /* NEW (vers. 4) Detected hw architecture */
    __u32       architecture;

    /* The device tree (internal addresses relative to the beginning of the tree,
     * device tree offset relative to the beginning of this structure).
     * On pre-PCI macintosh (BOOT_ARCH_PCI bit set to 0 in architecture), this
     * field is 0.
     */
    __u32       deviceTreeOffset;        /* Device tree offset */
    __u32       deviceTreeSize;          /* Size of the device tree */

    /* Some infos about the current MacOS display */
    __u32       dispDeviceRect[4];       /* left,top,right,bottom */
    __u32       dispDeviceDepth;         /* (8, 16 or 32) */
    __u8*       dispDeviceBase;          /* base address (physical) */
    __u32       dispDeviceRowBytes;      /* rowbytes (in bytes) */
    __u32       dispDeviceColorsOffset;  /* Colormap (8 bits only) or 0 (*) */
    /* Optional offset in the registry to the current
     * MacOS display. (Can be 0 when not detected) */
     __u32      dispDeviceRegEntryOffset;

    /* Optional pointer to boot ramdisk (offset from this structure) */
    __u32       ramDisk;
    __u32       ramDiskSize;             /* size of ramdisk image */

    /* Kernel command line arguments (offset from this structure) */
    __u32       kernelParamsOffset;

    /* ALL BELOW NEW (vers. 4) */

    /* This defines the physical memory. Valid with BOOT_ARCH_NUBUS flag
       (non-PCI) only. On PCI, memory is contiguous and it's size is in the
       device-tree. */
    boot_info_map_entry_t
    	        physMemoryMap[MAX_MEM_MAP_SIZE]; /* Where the phys memory is */
    __u32       physMemoryMapSize;               /* How many entries in map */


    /* The framebuffer size (optional, currently 0) */
    __u32       frameBufferSize;         /* Represents a max size, can be 0. */

    /* NEW (vers. 5) */

    /* Total params size (args + colormap + device tree + ramdisk) */
    __u32       totalParamsSize;

} boot_infos_t;

#ifdef __KERNEL__
/* (*) The format of the colormap is 256 * 3 * 2 bytes. Each color index
 * is represented by 3 short words containing a 16 bits (unsigned) color
 * component. Later versions may contain the gamma table for direct-color
 * devices here.
 */
#define BOOTX_COLORTABLE_SIZE    (256UL*3UL*2UL)

/* BootX passes the device-tree using a format that comes from earlier
 * ppc32 kernels. This used to match what is in prom.h, but not anymore
 * so we now define it here
 */
struct bootx_dt_prop {
	u32	name;
	int	length;
	u32	value;
	u32	next;
};

struct bootx_dt_node {
	u32	unused0;
	u32	unused1;
	u32	phandle;	/* not really available */
	u32	unused2;
	u32	unused3;
	u32	unused4;
	u32	unused5;
	u32	full_name;
	u32	properties;
	u32	parent;
	u32	child;
	u32	sibling;
	u32	next;
	u32	allnext;
};

extern void bootx_init(unsigned long r4, unsigned long phys);

#endif /* __KERNEL__ */

#ifdef macintosh
#pragma options align=reset
#endif

#endif