vb_util.c

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#include "vgatypes.h"
#include "vb_util.h"

void xgifb_reg_set(unsigned long port, u8 index, u8 data)
{
    outb(index, port);
    outb(data, port + 1);
}

u8 xgifb_reg_get(unsigned long port, u8 index)
{
    u8 data;

    outb(index, port);
    data = inb(port + 1);
    return data;
}

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

    temp = xgifb_reg_get(port, index); /* XGINew_Part1Port index 02 */
    temp = (temp & data_and) | data_or;
    xgifb_reg_set(port, index, temp);
}

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

    temp = xgifb_reg_get(port, index); /* XGINew_Part1Port index 02 */
    temp &= data_and;
    xgifb_reg_set(port, index, temp);
}

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

    temp = xgifb_reg_get(port, index); /* XGINew_Part1Port index 02 */
    temp |= data_or;
    xgifb_reg_set(port, index, temp);
}