URL https://opencores.org/ocsvn/thor/thor/trunk

Subversion Repositories thor

[/] [thor/] [trunk/] [software/] [FMTK/] [source/] [kernel/] [PIC.c] - Blame information for rev 23

Line No.	Rev	Author	Line
1	23	robfinch
2			`#define PIC 0xFFDC0FC0`
3			`#define PIC_IE 0xFFDC0FC8`
4			`#define PIC_ES 0xFFDC0FE0`
5			`#define PIC_RSTE 0xFFDC0FE8`
6
7			`// ----------------------------------------------------------------------------`
8			`// Get the vector base register`
9			`// ----------------------------------------------------------------------------`
10
11			`unsigned int *GetVBR()`
12			`{`
13			`asm {`
14			`mfspr r1,c12`
15			`}`
16			`}`
17
18
19			`// ----------------------------------------------------------------------------`
20			`// Set an IRQ vector`
21			`// ----------------------------------------------------------------------------`
22
23			`pascal void set_vector(unsigned int vecno, unsigned int rout)`
24			`{`
25			`if (vecno > 255) return;`
26			`if (rout == 0) return;`
27			`asm __leafs {`
28			`lw r2,32[bp]`
29			`lw r1,40[bp]`
30			`jsr set_vector`
31			`}`
32			`// GetVBR()[vecno] = rout;`
33			`}`
34
35			`// ----------------------------------------------------------------------------`
36			`// 0 is highest priority, 15 is lowest`
37			`// 0 NMI (parity error)`
38			`// 1 1024 Hz timer interrupt`
39			`// 2 30Hz timer interrupt`
40			`// 3 Keyboard interrupt`
41			`// ...`
42			`// 15`
43			`//`
44			`// ----------------------------------------------------------------------------`
45			`void InitPIC()`
46			`{`
47			`outh(PIC_ES, 0x0007); // nmi,timer interrupt(s) are edge sensitive`
48			`outh(PIC_IE, 0x000F); //enable keyboard reset, timer interrupts`
49			`}`
50