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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 | /* System calls for X extender */ |
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| 23 | /* BIOS Call from X (Basic Reflection Service) */ |
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| 24 | |||
| 25 | #include <ll/i386/hw-data.h> |
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| 26 | #include <ll/i386/x-bios.h> |
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| 27 | #include <ll/i386/mem.h> |
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| 28 | |||
| 29 | FILE(X - BIOS); |
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| 30 | |||
| 31 | /* The interface between X (and 32 bit PM) and BIOS (which runs at 16 bits */ |
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| 32 | /* It works as int86() standard library call */ |
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| 33 | |||
| 34 | void X_callBIOS(int service, X_REGS16 * in, X_REGS16 * out, X_SREGS16 * s) |
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| 35 | { |
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| 36 | /* Assembler gate JMP instruction */ |
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| 37 | extern void _x_callBIOS(void); |
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| 38 | X_CALLBIOS *xbc = x_bios_address(); |
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| 39 | |||
| 40 | /* Send interrupt request & register through the X_Info structure */ |
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| 41 | xbc->irqno = service; |
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| 42 | memcpy(&(xbc->ir), in, sizeof(X_REGS16)); |
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| 43 | memcpy(&(xbc->sr), s, sizeof(X_SREGS16)); |
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| 44 | |||
| 45 | /* Back to RM to execute the BIOS routine */ |
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| 46 | _x_callBIOS(); |
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| 47 | |||
| 48 | /* Get the return register values */ |
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| 49 | memcpy(out, &(xbc->or), sizeof(X_REGS16)); |
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| 50 | memcpy(s, &(xbc->sr), sizeof(X_SREGS16)); |
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| 51 | } |