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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 | /* Context switch code */ |
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| 23 | |||
| 24 | #include <ll/i386/hw-data.h> |
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| 25 | #include <ll/i386/hw-func.h> |
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| 26 | #include <ll/i386/tss-ctx.h> |
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| 27 | |||
| 40 | pj | 28 | FILE(Context-Switch); |
| 2 | pj | 29 | |
| 30 | extern unsigned short int currCtx; |
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| 31 | #ifdef __VIRCSW__ |
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| 32 | extern int activeInt; |
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| 33 | #endif |
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| 34 | |||
| 35 | extern void context_load(CONTEXT c); |
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| 36 | |||
| 37 | void ll_context_to(CONTEXT c) |
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| 38 | { |
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| 39 | #ifdef __VIRCSW__ |
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| 40 | pj | 40 | currCtx = c; |
| 41 | if (activeInt == 0) { |
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| 42 | context_load(c); |
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| 43 | } |
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| 44 | #else |
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| 45 | currCtx = c; |
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| 2 | pj | 46 | context_load(c); |
| 47 | #endif |
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| 48 | } |
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| 49 | CONTEXT ll_context_from(void) |
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| 50 | { |
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| 51 | #ifdef __VIRCSW__ |
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| 40 | pj | 52 | return currCtx; |
| 2 | pj | 53 | #else |
| 40 | pj | 54 | return context_save(); |
| 2 | pj | 55 | #endif |
| 56 | } |
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| 57 | |||
| 58 | CONTEXT ll_context_save(void) |
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| 59 | { |
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| 40 | pj | 60 | return currCtx; |
| 2 | pj | 61 | } |
| 62 | |||
| 63 | void ll_context_load(CONTEXT c) |
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| 64 | { |
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| 40 | pj | 65 | currCtx = c; |
| 66 | context_load(c); |
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| 2 | pj | 67 | } |