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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 | /* As the name says... |
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| 23 | All the hardware-dependent functions |
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| 24 | IDT/GDT management |
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| 25 | context switch |
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| 26 | IRQ/Exc handling... */ |
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| 27 | |||
| 28 | #ifndef __LL_I386_HW_FUNC_H__ |
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| 29 | #define __LL_I386_HW_FUNC_H__ |
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| 30 | |||
| 31 | #include <ll/i386/defs.h> |
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| 32 | BEGIN_DEF |
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| 33 | |||
| 34 | #include <ll/i386/hw-instr.h> |
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| 35 | |||
| 36 | /* Low level exit functions! It will halt, reboot or |
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| 37 | * give back the control to X, depending on how YAMME started... |
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| 38 | */ |
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| 39 | void __exit(int code) __attribute__((noreturn)); |
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| 40 | void halt(void); |
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| 41 | |||
| 42 | /* Functions to reboot the machine */ |
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| 43 | void cold_reboot(void); |
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| 44 | void warm_reboot(void); |
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| 45 | void reboot(int mode); |
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| 46 | |||
| 47 | /* System tables management functions */ |
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| 48 | void IDT_place(BYTE num,void (*handler)(void)); |
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| 49 | void GDT_place(WORD sel,DWORD base,DWORD lim,BYTE acc,BYTE gran); |
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| 50 | DWORD GDT_read(WORD sel,DWORD *lim,BYTE *acc,BYTE *gran); |
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| 51 | LIN_ADDR addr2linear(unsigned short sel,unsigned long offset); |
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| 52 | |||
| 53 | /* These 3 function realize the context switching. The context_save has */ |
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| 54 | /* to be the first call of a kernel primitive, and the context_change has */ |
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| 55 | /* to be the last call. */ |
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| 56 | /* The context_save disables the interrupt (a kernel primitive must be */ |
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| 57 | /* atomic) and return the context of the running task. */ |
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| 58 | /* The context_change take the context of the new task (or of the */ |
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| 59 | /* same task), switch to the new context and return restoring the flag */ |
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| 60 | /* register. */ |
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| 61 | /* The context_load is used when the task is going to be killed; then its */ |
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| 62 | /* context does not need to be saved; we only need to load the context of */ |
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| 63 | /* the new task; the effective implementation of this functions can vary */ |
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| 64 | /* greatly throughout different implementations as some of them are */ |
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| 65 | /* mapped to empty functions or mapped one onto another */ |
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| 66 | |||
| 67 | CONTEXT ll_context_save(void); |
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| 68 | void ll_context_change(CONTEXT c); |
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| 69 | void ll_context_load(CONTEXT c); |
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| 70 | |||
| 71 | CONTEXT ll_context_from(void); |
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| 72 | void ll_context_to(CONTEXT c); |
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| 73 | |||
| 74 | |||
| 75 | |||
| 76 | void *l1_init(void); |
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| 77 | void l1_end(void); |
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| 78 | void l1_exc_bind(int i, void (*f)(int n)); |
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| 79 | void l1_irq_bind(int i, void (*f)(int n)); |
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| 80 | |||
| 81 | |||
| 82 | END_DEF |
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| 83 | |||
| 84 | #endif |