Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | /* Project: OSLib |
| 2 | * Description: The OS Construction Kit |
||
| 3 | * Date: 1.6.2000 |
||
| 4 | * Idea by: Luca Abeni & Gerardo Lamastra |
||
| 5 | * |
||
| 6 | * OSLib is an SO project aimed at developing a common, easy-to-use |
||
| 7 | * low-level infrastructure for developing OS kernels and Embedded |
||
| 8 | * Applications; it partially derives from the HARTIK project but it |
||
| 9 | * currently is independently developed. |
||
| 10 | * |
||
| 11 | * OSLib is distributed under GPL License, and some of its code has |
||
| 12 | * been derived from the Linux kernel source; also some important |
||
| 13 | * ideas come from studying the DJGPP go32 extender. |
||
| 14 | * |
||
| 15 | * We acknowledge the Linux Community, Free Software Foundation, |
||
| 16 | * D.J. Delorie and all the other developers who believe in the |
||
| 17 | * freedom of software and ideas. |
||
| 18 | * |
||
| 19 | * For legalese, check out the included GPL license. |
||
| 20 | */ |
||
| 21 | |||
| 22 | /* System calls for X extender */ |
||
| 23 | /* BIOS Call from X (Basic Reflection Service) */ |
||
| 24 | |||
| 25 | #include <ll/i386/hw-data.h> |
||
| 26 | #include <ll/i386/x-bios.h> |
||
| 27 | #include <ll/i386/mem.h> |
||
| 28 | |||
| 29 | FILE(X - BIOS); |
||
| 30 | |||
| 31 | /* The interface between X (and 32 bit PM) and BIOS (which runs at 16 bits */ |
||
| 32 | /* It works as int86() standard library call */ |
||
| 33 | |||
| 34 | void X_callBIOS(int service, X_REGS16 * in, X_REGS16 * out, X_SREGS16 * s) |
||
| 35 | { |
||
| 36 | /* Assembler gate JMP instruction */ |
||
| 37 | extern void _x_callBIOS(void); |
||
| 38 | X_CALLBIOS *xbc = x_bios_address(); |
||
| 39 | |||
| 40 | /* Send interrupt request & register through the X_Info structure */ |
||
| 41 | xbc->irqno = service; |
||
| 42 | memcpy(&(xbc->ir), in, sizeof(X_REGS16)); |
||
| 43 | memcpy(&(xbc->sr), s, sizeof(X_SREGS16)); |
||
| 44 | |||
| 45 | /* Back to RM to execute the BIOS routine */ |
||
| 46 | _x_callBIOS(); |
||
| 47 | |||
| 48 | /* Get the return register values */ |
||
| 49 | memcpy(out, &(xbc->or), sizeof(X_REGS16)); |
||
| 50 | memcpy(s, &(xbc->sr), sizeof(X_SREGS16)); |
||
| 51 | } |