1 #include <u.h>
2 #include <libc.h>
3 #include <mach.h>
4 
5 Regdesc*
6 regdesc(char *name)
7 {
8 	Regdesc *r;
9 
10 	for(r=mach->reglist; r->name; r++)
11 		if(strcmp(r->name, name) == 0)
12 			return r;
13 	return nil;
14 }
15 
16 int
17 rput(Regs *regs, char *name, u64int u)
18 {
19 	if(regs == nil){
20 		werrstr("registers not mapped");
21 		return -1;
22 	}
23 	return regs->rw(regs, name, &u, 0);
24 }
25 
26 int
27 rget(Regs *regs, char *name, u64int *u)
28 {
29 	if(regs == nil){
30 		*u = ~(u64int)0;
31 		werrstr("registers not mapped");
32 		return -1;
33 	}
34 	return regs->rw(regs, name, u, 1);
35 }
36 
37 int
38 _uregrw(Regs *regs, char *name, u64int *u, int isr)
39 {
40 	Regdesc *r;
41 	uchar *ureg;
42 
43 	if(!isr){
44 		werrstr("cannot write registers");
45 		return -1;
46 	}
47 
48 	if((r = regdesc(name)) == nil)
49 		return -1;
50 	ureg = ((UregRegs*)regs)->ureg + r->offset;
51 
52 	switch(r->format){
53 	default:
54 	case 'X':
55 		*u = mach->swap4(*(u32int*)ureg);
56 		return 0;
57 	case 'Y':
58 		*u = mach->swap8(*(u64int*)ureg);
59 		return 0;
60 	}
61 }