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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | /* Project: OSLib |
| 2 | * Description: The OS Construction Kit |
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| 3 | * Date: 1.6.2000 |
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| 4 | * Idea by: Luca Abeni & Gerardo Lamastra |
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| 5 | * |
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| 6 | * OSLib is an SO project aimed at developing a common, easy-to-use |
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| 7 | * low-level infrastructure for developing OS kernels and Embedded |
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| 8 | * Applications; it partially derives from the HARTIK project but it |
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| 9 | * currently is independently developed. |
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| 10 | * |
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| 11 | * OSLib is distributed under GPL License, and some of its code has |
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| 12 | * been derived from the Linux kernel source; also some important |
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| 13 | * ideas come from studying the DJGPP go32 extender. |
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| 14 | * |
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| 15 | * We acknowledge the Linux Community, Free Software Foundation, |
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| 16 | * D.J. Delorie and all the other developers who believe in the |
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| 17 | * freedom of software and ideas. |
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| 18 | * |
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| 19 | * For legalese, check out the included GPL license. |
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| 20 | */ |
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| 21 | |||
| 22 | /* Access the info stucture */ |
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| 23 | |||
| 1621 | fabio | 24 | #include <arch/i386/stdlib.h> |
| 2 | pj | 25 | #include <ll/i386/hw-func.h> |
| 26 | #include <ll/i386/mb-info.h> |
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| 27 | #include <ll/i386/x-bios.h> |
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| 28 | |||
| 40 | pj | 29 | FILE(X-Info); |
| 2 | pj | 30 | |
| 31 | /* |
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| 32 | The x_bios is stored in the low memory area and contains all the |
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| 33 | stuff necessary to perform a BIOS call from PM; it can be accessed |
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| 34 | using a linear pointer, which is returned by the following call! |
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| 35 | */ |
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| 36 | |||
| 40 | pj | 37 | X_CALLBIOS * x_bios_address(void) |
| 2 | pj | 38 | { |
| 40 | pj | 39 | X_CALLBIOS *a = (X_CALLBIOS *)GDT_read(X_CALLBIOS_SEL,NULL,NULL,NULL); |
| 2 | pj | 40 | return (a); |
| 41 | } |
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| 42 | |||
| 43 | /* Stuff information retrieving function */ |
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| 44 | |||
| 45 | WORD X_version(void) |
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| 46 | { |
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| 47 | X_CALLBIOS *x_bios = x_bios_address(); |
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| 83 | pj | 48 | return(x_bios->_ver); |
| 2 | pj | 49 | } |
| 50 | |||
| 40 | pj | 51 | void X_meminfo(LIN_ADDR *b1,DWORD *s1,LIN_ADDR *b2,DWORD *s2) |
| 2 | pj | 52 | { |
| 53 | struct multiboot_info *mbi = mbi_address(); |
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| 40 | pj | 54 | int x = 0; |
| 55 | |||
| 56 | if (mbi->flags & MB_INFO_BOOT_LOADER_NAME) { |
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| 57 | char *name; |
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| 58 | |||
| 59 | name = (char *) mbi->boot_loader_name; |
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| 60 | if (*name == 'X') { |
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| 61 | x = 1; |
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| 62 | } |
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| 63 | } |
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| 64 | if (x) { |
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| 65 | if (b1 != NULL) *b1 = (LIN_ADDR)mbi->mem_upbase; |
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| 66 | if (s1 != NULL) *s1 = mbi->mem_upper * 1024; |
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| 67 | if (b2 != NULL) *b2 = (LIN_ADDR)mbi->mem_lowbase; |
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| 68 | if (s2 != NULL) *s2 = mbi->mem_lower * 1024; |
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| 2 | pj | 69 | } else { |
| 40 | pj | 70 | if (b1 != NULL) *b1 = (LIN_ADDR)0x100000; |
| 71 | if (s1 != NULL) *s1 = mbi->mem_upper * 1024; |
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| 72 | if (b2 != NULL) *b2 = (LIN_ADDR)0x4000; |
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| 73 | if (s2 != NULL) *s2 = mbi->mem_lower * 1024; |
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| 2 | pj | 74 | } |
| 75 | /* |
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| 76 | #ifdef __OLD_MB__ |
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| 77 | if (b1 != NULL) *b1 = 0x100000; |
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| 78 | if (s1 != NULL) *s1 = mbi->mem_upper; |
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| 79 | if (b2 != NULL) *b2 = 0x4000; |
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| 80 | if (s2 != NULL) *s2 = mbi->mem_lower; |
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| 81 | #else |
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| 82 | if (b1 != NULL) *b1 = mbi->mem_upbase; |
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| 83 | if (s1 != NULL) *s1 = mbi->mem_upper; |
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| 84 | if (b2 != NULL) *b2 = mbi->mem_lowbase; |
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| 85 | if (s2 != NULL) *s2 = mbi->mem_lower; |
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| 86 | #endif |
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| 87 | */ |
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| 88 | } |
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| 89 | |||
| 90 | #ifdef CHECK |
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| 91 | #include <cons.h> |
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| 92 | /* Alert if a wrong addressing is intercepted */ |
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| 93 | /* Used only for debug purposes */ |
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| 94 | |||
| 40 | pj | 95 | void check_addr(void *addr,char *caller) |
| 2 | pj | 96 | { |
| 97 | extern DWORD _stktop; |
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| 40 | pj | 98 | if ((DWORD)(addr) < _stktop) { |
| 99 | cprintf("CRISIS! Addr : %lx(%lx) Caller was %s\n",(DWORD)(addr),_stktop,caller); |
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| 2 | pj | 100 | } |
| 101 | } |
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| 102 | #endif |