forked from davilla/atv-bootloader
-
Notifications
You must be signed in to change notification settings - Fork 0
/
boot_loader.c
152 lines (131 loc) · 6.43 KB
/
boot_loader.c
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
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
// original loader_init.c from mach_boot_linux (Edgar (gimli) Hucek)
//ACPI=0xfefd000 <6> ACPI 2.0=0xfefd014 <6> SMBIOS=0xfebe000
//[ 0.000000] mem00: type=EFI_CONVENTIONAL_MEMORY, attr=0xf, range=[0x0000000000000000-0x000000000008f000) (0MB)
//[ 0.000000] mem01: type=EFI_ACPI_MEMORY_NVS, attr=0xf, range=[0x000000000008f000-0x0000000000090000) (0MB)
//[ 0.000000] mem02: type=EFI_CONVENTIONAL_MEMORY, attr=0xf, range=[0x0000000000090000-0x00000000000a0000) (0MB)
//[ 0.000000] mem36: type=EFI_RESERVED_TYPE, attr=0x0, range=[0x00000000000a0000-0x00000000000c0000) (0MB)
//[ 0.000000] mem03: type=EFI_CONVENTIONAL_MEMORY, attr=0xf, range=[0x00000000000c0000-0x000000000b000000) (175MB)
//[ 0.000000] mem04: type=EFI_LOADER_DATA, attr=0xf, range=[0x000000000b000000-0x000000000b66e000) (6MB)
//[ 0.000000] mem05: type=EFI_CONVENTIONAL_MEMORY, attr=0xf, range=[0x000000000b66e000-0x000000000d9c4000) (35MB)
//[ 0.000000] mem06: type=EFI_BOOT_SERVICES_DATA, attr=0xf, range=[0x000000000d9c4000-0x000000000da13000) (0MB)
//[ 0.000000] mem07: type=EFI_CONVENTIONAL_MEMORY, attr=0xf, range=[0x000000000da13000-0x000000000da24000) (0MB)
//[ 0.000000] mem08: type=EFI_LOADER_CODE, attr=0xf, range=[0x000000000da24000-0x000000000da4e000) (0MB)
//[ 0.000000] mem09: type=EFI_CONVENTIONAL_MEMORY, attr=0xf, range=[0x000000000da4e000-0x000000000e6ed000) (12MB)
//
// PCI: BIOS Bug: MCFG area at f0000000 is not E820-reserved
// pnp: 00:01: iomem range 0xf0000000-0xf3ffffff could not be reserved (64MB)
// pnp: 00:01: iomem range 0xfed1c000-0xfed1ffff could not be reserved
// PCI: Failed to allocate mem resource #6:20000@20000000 for 0000:01:00.0
// RAM top 0x10000000
// mach_kernel loads at 0x02000000
// linux kernel loads at 0x00100000
// linux kernel reserve to 0x00400000
// linux initrd loads at 0x00F43800
#include "types.h"
#include "utils.h"
#include "linux_code.h"
#include "elilo_code.h"
#include "darwin_code.h"
extern int sprintf(char * buf, const char *fmt, ...);
//
mach_boot_parms *mach_bp;
//
//
/**********************************************************************/
#define KERNEL_RESERVE_SIZE 0x00400000
#define BOOT_PARAM_MEMSIZE 0x00004000 // 16384
/**********************************************************************/
void
load_linux(unsigned int args)
{
int i;
char *ptr;
kdesc_t kd;
unsigned char szBootSect[BOOT_PARAM_MEMSIZE];
boot_params_t *bp = (boot_params_t*)szBootSect;
char *cmdline = (char*)&szBootSect[BOOT_PARAM_MEMSIZE - 2048];
unsigned long kernel_len = 0;
unsigned char *kernel_ptr = NULL;
unsigned long initrd_len = 0;
unsigned char *initrd_ptr = NULL;
mach_bp = (mach_boot_parms*)args;
vmode.width = mach_bp->video.rowb / 4;
vmode.height = mach_bp->video.height;
vmode.xmargin = 0;
// clear the screen
//sleep(10);
memset((char*)mach_bp->video.addr, 0x00, vmode.width * vmode.height * 4);
//
VIDEO_CURSOR_POSX = 0;
VIDEO_CURSOR_POSY = 0;
VIDEO_ATTR = 0xffc8c8c8;
//
printk("ATV: ATV_BootLoader v0.8 (http://atv-bootloader.googlecode.com/)\n");
printk("ATV: Copyright (C) 2008 ATV Bootloader Team - Licensed under the GPL v2\n");
printk("ATV: FB Start 0x%08X, with %d height %d rowb %d depth %d\n",
mach_bp->video.addr,
mach_bp->video.width,
mach_bp->video.height,
mach_bp->video.rowb,
mach_bp->video.depth);
//printk("mach_bp->devtree_len=0x%08X, mach_bp->devtree_ptr=0x%08X",
// mach_bp->devtree_len, mach_bp->devtree_ptr);
//sleep(10);
// find the kernel and load it in the proper location
kernel_ptr = (unsigned char*)getsectdatafromheader(&_mh_execute_header, "__TEXT", "__vmlinuz", &kernel_len);
//printk("ATV: kernel_ptr = 0x%08X, kernel_len = 0x%08X\n", kernel_ptr, kernel_len);
// kernel integrity check
if (kernel_ptr[0x1FE] != 0x55 || kernel_ptr[0x1FF] != 0xAA) {
printk("ATV: kernel_ptr[0x1FE] = 0x%X, kernel_ptr[0x1FF] = 0x%X\n", kernel_ptr[0x1FE], kernel_ptr[0x1FF]);
printk("ATV: Kernel is not a vmlinuz or bzImage kernel image.\n");
while(1);
}
// load kernel into it in the proper location (1M)
kernel_start = (VOID*)0x00100000;
// zero kernel destination in ram memory
memset(kernel_start, 0x00, KERNEL_RESERVE_SIZE);
// compute kernel size from actual kernel using zero-page setup_sectors (512 bytes per sector)
kernel_size = kernel_len - ((kernel_ptr[0x1F1] + 1) * 512);
// copy loaded kernel to base memory location
memcpy(kernel_start, &kernel_ptr[ (kernel_ptr[0x1F1] + 1) * 512 ], kernel_size);
// find possible initrd, start_kernel will handle loading into a proper location)
initrd_ptr = (unsigned char*)getsectdatafromheader(&_mh_execute_header, "__TEXT", "__initrd", &initrd_len);
//printk("ATV: initrd_ptr = 0x%08X, initrd_len = 0x%08X\n", initrd_ptr, initrd_len);
initrd_start = initrd_ptr;
initrd_size = initrd_len;
// setup the kernel boot parameters
// zero boot param structure
memset(bp, 0x00, BOOT_PARAM_MEMSIZE);
// copy the "zero page" from the kernel that was loaded (8192 bytes)
memcpy(bp, kernel_ptr, 0x2000);
// create linux kernel command line params from mach-o passed command line params
// this comes from com.apple.Boot.plist under <key>Kernel Flags</key>
sprintf(cmdline, "%s", mach_bp->cmdline);
/*
sprintf(cmdline, "%s video=imacfb:appletv,width:%d,height:%d,linelength:%d,base:%d",
mach_bp->cmdline,
mach_bp->video.width,
mach_bp->video.height,
mach_bp->video.rowb,
mach_bp->video.addr);
*/
printk("ATV: kernel command line-> %s\n", cmdline);
// now format the linux kernel boot params
create_boot_params(bp, cmdline);
//sleep(10);
printk("ATV: starting Linux...\n");
// kernel_start = 0x100000 defined in system.c
kd.kstart = kd.kentry = kernel_start;
kd.kend = ((UINT8*)kd.kstart) + KERNEL_RESERVE_SIZE;
start_kernel(kd.kentry, bp);
printk("ATV: error something's is wrong\n");
while(1);
}