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Kernel: Add ioctls to BochsVGADevice for mode setting and page flipping.

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Use these in WindowServer instead of poking at the BochsVGADevice directly.
This commit is contained in:
Andreas Kling 2019-02-16 10:24:55 +01:00
parent 799177feda
commit 468113422f
6 changed files with 50 additions and 16 deletions
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26
Kernel/BochsVGADevice.cpp
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@ -3,6 +3,7 @@
#include <Kernel/PCI.h>
#include <Kernel/MemoryManager.h>
#include <Kernel/Process.h>
#include <LibC/errno_numbers.h>
#define VBE_DISPI_IOPORT_INDEX 0x01CE
#define VBE_DISPI_IOPORT_DATA 0x01CF
@ -21,6 +22,13 @@
#define VBE_DISPI_ENABLED 0x01
#define VBE_DISPI_LFB_ENABLED 0x40
#define BXVGA_DEV_IOCTL_SET_Y_OFFSET 1982
#define BXVGA_DEV_IOCTL_SET_RESOLUTION 1985
struct BXVGAResolution {
int width;
int height;
};
static BochsVGADevice* s_the;
BochsVGADevice& BochsVGADevice::the()
@ -87,6 +95,24 @@ dword BochsVGADevice::find_framebuffer_address()
return framebuffer_address;
}
int BochsVGADevice::ioctl(Process& process, unsigned int request, unsigned int arg)
{
switch (request) {
case BXVGA_DEV_IOCTL_SET_Y_OFFSET:
set_y_offset(arg);
return 0;
case BXVGA_DEV_IOCTL_SET_RESOLUTION: {
auto* resolution = (const BXVGAResolution*)arg;
if (!process.validate_read_typed(resolution))
return -EFAULT;
set_resolution(resolution->width, resolution->height);
return 0;
}
default:
return -EINVAL;
};
}
bool BochsVGADevice::can_read(Process&) const
{
ASSERT_NOT_REACHED();