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Commit | Line | Data |
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9b8c947b | 1 | #include "console.h" |
60a917ef | 2 | #include <io.h> |
c34aba05 | 3 | #include <smram.h> |
9b8c947b | 4 | |
e5d94488 JP |
5 | #define INFO_SIGNATURE 0x5754454E |
6 | ||
c4a16564 JW |
7 | extern char _binary_realmode_bin_start[]; |
8 | extern int _binary_realmode_bin_size; | |
9 | ||
9b8c947b | 10 | struct mb_info |
56553b73 | 11 | { |
9b8c947b JW |
12 | unsigned long flags; |
13 | unsigned long mem_lower, mem_upper; | |
14 | unsigned long boot_dev; | |
15 | char *cmdline; | |
16 | unsigned long mod_cnt; | |
17 | struct mod_info *mods; | |
18 | }; | |
19 | ||
20 | struct mod_info | |
21 | { | |
22 | void *mod_start; | |
23 | void *mod_end; | |
24 | char *mod_string; | |
25 | void *reserved; | |
26 | }; | |
27 | ||
e5d94488 JP |
28 | struct info_section |
29 | { | |
30 | unsigned int signature; | |
31 | void (*firstrun)(); | |
32 | }; | |
33 | ||
c34aba05 | 34 | void c_start(unsigned int magic, struct mb_info *info) |
9b8c947b | 35 | { |
e5d94488 | 36 | struct mod_info *mods = info->mods; |
7e16b8e6 | 37 | unsigned short *grubptr = (unsigned short *)0x7CFE; |
60a917ef | 38 | unsigned char smramc; |
9b8c947b JW |
39 | int i; |
40 | ||
7e16b8e6 | 41 | void (*realmode)() = (void (*)()) 0x4000; |
c4a16564 | 42 | |
9b8c947b | 43 | show_cursor(); |
81148fa1 JW |
44 | puts("NetWatch loader\n"); |
45 | ||
46 | if (magic != 0x2BADB002) | |
47 | { | |
48 | puts("Bootloader was not multiboot compliant; cannot continue.\n"); | |
49 | while(1) asm("hlt"); | |
50 | } | |
9b8c947b | 51 | |
c34aba05 | 52 | for (i = 0; i < info->mod_cnt; i++) |
9b8c947b | 53 | { |
81148fa1 | 54 | puts("Module found:\n"); |
c34aba05 JP |
55 | puts(" Start: "); puthex(mods[i].mod_start); puts("\n"); |
56 | puts(" Size: "); puthex(mods[i].mod_end - mods[i].mod_start); puts("\n"); | |
57 | puts(" Name: "); puts(mods[i].mod_string); puts("\n"); | |
9b8c947b | 58 | } |
c4a16564 | 59 | |
c34aba05 | 60 | if (info->mod_cnt != 1) |
d56898ee | 61 | { |
60a917ef | 62 | puts("Expected exactly one module; cannot continue.\n"); |
d56898ee | 63 | while(1) asm("hlt"); |
64 | } | |
65 | ||
60a917ef JW |
66 | puts("Current USB state is: "); puthex(pci_read16(0, 31, 2, 0xC0)); puts(" "); puthex(pci_read16(0, 31, 4, 0xC0)); puts("\n"); |
67 | puts("Current SMI state is: "); puthex(inl(0x830)); puts("\n"); | |
68 | puts("Current SMRAMC state is: "); puthex(pci_read8(0, 0, 0, 0x70)); puts("\n"); | |
69 | ||
81148fa1 | 70 | outl(0x830, inl(0x830) & ~0x1); /* turn off SMIs */ |
60a917ef JW |
71 | |
72 | /* Try really hard to shut up USB_LEGKEY. */ | |
73 | pci_write16(0, 31, 2, 0xC0, pci_read16(0, 31, 2, 0xC0)); | |
74 | pci_write16(0, 31, 2, 0xC0, 0); | |
75 | pci_write16(0, 31, 4, 0xC0, pci_read16(0, 31, 4, 0xC0)); | |
76 | pci_write16(0, 31, 4, 0xC0, 0); | |
c34aba05 JP |
77 | |
78 | ||
79 | /* Open the SMRAM aperture and load our ELF. */ | |
80 | smram_state_t old_smramc = smram_save_state(); | |
81 | ||
82 | if (smram_aseg_set_state(SMRAM_ASEG_OPEN) != 0) | |
83 | { | |
84 | puts("Opening SMRAM failed; cannot load ELF.\n"); | |
85 | } | |
86 | else | |
87 | { | |
88 | load_elf(mods[0].mod_start, mods[0].mod_end - mods[0].mod_start); | |
e5d94488 JP |
89 | |
90 | struct info_section * info = (struct info_section *)0x10000; | |
91 | if (info->signature != INFO_SIGNATURE) | |
92 | { | |
93 | smram_restore_state(old_smramc); | |
94 | puts("Info section signature mismatch.\n"); | |
95 | } | |
96 | else { | |
97 | info->firstrun(); | |
98 | smram_restore_state(old_smramc); | |
99 | } | |
c34aba05 JP |
100 | } |
101 | ||
60a917ef JW |
102 | puts("Waiting for a bit before returning to real mode..."); |
103 | for (i=0; i<0x500000; i++) | |
104 | { | |
105 | if ((i % 0x100000) == 0) | |
106 | puts("."); | |
107 | inb(0x80); | |
108 | } | |
109 | puts("\n"); | |
d56898ee | 110 | |
c4a16564 JW |
111 | puts("Now returning to real mode.\n"); |
112 | memcpy(0x4000, _binary_realmode_bin_start, (int)&_binary_realmode_bin_size); | |
86c89e89 | 113 | realmode(); // goodbye! |
56553b73 | 114 | } |