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 | /* Context switch code */ |
||
| 23 | |||
| 24 | #include <ll/i386/hw-data.h> |
||
| 25 | #include <ll/i386/hw-func.h> |
||
| 26 | #include <ll/i386/tss-ctx.h> |
||
| 27 | |||
| 28 | FILE(Context - Switch); |
||
| 29 | |||
| 30 | extern unsigned short int currCtx; |
||
| 31 | #ifdef __VIRCSW__ |
||
| 32 | extern int activeInt; |
||
| 33 | #endif |
||
| 34 | |||
| 35 | extern void context_load(CONTEXT c); |
||
| 36 | |||
| 37 | void ll_context_to(CONTEXT c) |
||
| 38 | { |
||
| 39 | #ifdef __VIRCSW__ |
||
| 40 | currCtx = c; |
||
| 41 | if (activeInt == 0) { |
||
| 42 | context_load(c); |
||
| 43 | } |
||
| 44 | #else |
||
| 45 | currCtx = c; |
||
| 46 | context_load(c); |
||
| 47 | #endif |
||
| 48 | } |
||
| 49 | CONTEXT ll_context_from(void) |
||
| 50 | { |
||
| 51 | #ifdef __VIRCSW__ |
||
| 52 | return currCtx; |
||
| 53 | #else |
||
| 54 | return context_save(); |
||
| 55 | #endif |
||
| 56 | } |
||
| 57 | |||
| 58 | CONTEXT ll_context_save(void) |
||
| 59 | { |
||
| 60 | return currCtx; |
||
| 61 | } |
||
| 62 | |||
| 63 | void ll_context_load(CONTEXT c) |
||
| 64 | { |
||
| 65 | currCtx = c; |
||
| 66 | context_load(c); |
||
| 67 | } |