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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 | |||
| 353 | giacomo | 28 | #include <tracer.h> |
| 29 | |||
| 40 | pj | 30 | FILE(Context-Switch); |
| 2 | pj | 31 | |
| 32 | extern unsigned short int currCtx; |
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| 33 | #ifdef __VIRCSW__ |
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| 34 | extern int activeInt; |
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| 35 | #endif |
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| 36 | |||
| 37 | extern void context_load(CONTEXT c); |
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| 38 | |||
| 39 | void ll_context_to(CONTEXT c) |
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| 40 | { |
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| 41 | #ifdef __VIRCSW__ |
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| 40 | pj | 42 | currCtx = c; |
| 43 | if (activeInt == 0) { |
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| 502 | giacomo | 44 | TRACER_LOGEVENT(FTrace_EVT_context_switch, (unsigned short int)c, 0); |
| 40 | pj | 45 | context_load(c); |
| 46 | } |
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| 47 | #else |
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| 48 | currCtx = c; |
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| 2 | pj | 49 | context_load(c); |
| 50 | #endif |
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| 51 | } |
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| 52 | CONTEXT ll_context_from(void) |
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| 53 | { |
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| 54 | #ifdef __VIRCSW__ |
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| 40 | pj | 55 | return currCtx; |
| 2 | pj | 56 | #else |
| 40 | pj | 57 | return context_save(); |
| 2 | pj | 58 | #endif |
| 59 | } |
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| 60 | |||
| 61 | CONTEXT ll_context_save(void) |
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| 62 | { |
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| 40 | pj | 63 | return currCtx; |
| 2 | pj | 64 | } |
| 65 | |||
| 66 | void ll_context_load(CONTEXT c) |
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| 67 | { |
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| 40 | pj | 68 | currCtx = c; |
| 502 | giacomo | 69 | TRACER_LOGEVENT(FTrace_EVT_context_switch, (unsigned short int)c, 0); |
| 40 | pj | 70 | context_load(c); |
| 2 | pj | 71 | } |