Training courses

Kernel and Embedded Linux

Bootlin training courses

Embedded Linux, kernel,
Yocto Project, Buildroot, real-time,
graphics, boot time, debugging...

Bootlin logo

Elixir Cross Referencer

Open Menu /drivers/staging/xgifb/vb_util.h 
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
#ifndef _VBUTIL_
#define _VBUTIL_
static inline void xgifb_reg_set(unsigned long port, u8 index, u8 data)
{
	outb(index, port);
	outb(data, port + 1);
}

static inline u8 xgifb_reg_get(unsigned long port, u8 index)
{
	outb(index, port);
	return inb(port + 1);
}

static inline void xgifb_reg_and_or(unsigned long port, u8 index,
				    unsigned int data_and, unsigned int data_or)
{
	u8 temp;

	temp = xgifb_reg_get(port, index);
	temp = (u8)((temp & data_and) | data_or);
	xgifb_reg_set(port, index, temp);
}

static inline void xgifb_reg_and(unsigned long port, u8 index,
				 unsigned int data_and)
{
	u8 temp;

	temp = xgifb_reg_get(port, index);
	temp = (u8)(temp & data_and);
	xgifb_reg_set(port, index, temp);
}

static inline void xgifb_reg_or(unsigned long port, u8 index,
				unsigned int data_or)
{
	u8 temp;

	temp = xgifb_reg_get(port, index);
	temp |= data_or;
	xgifb_reg_set(port, index, temp);
}
#endif