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Kernel: Rename BochsVGADevice to BXVGADevice.
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4 changed files with 22 additions and 22 deletions
143
Kernel/BXVGADevice.cpp
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143
Kernel/BXVGADevice.cpp
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#include <Kernel/BXVGADevice.h>
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#include <Kernel/IO.h>
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#include <Kernel/PCI.h>
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#include <Kernel/MemoryManager.h>
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#include <Kernel/Process.h>
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#include <LibC/errno_numbers.h>
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#define VBE_DISPI_IOPORT_INDEX 0x01CE
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#define VBE_DISPI_IOPORT_DATA 0x01CF
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#define VBE_DISPI_INDEX_ID 0x0
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#define VBE_DISPI_INDEX_XRES 0x1
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#define VBE_DISPI_INDEX_YRES 0x2
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#define VBE_DISPI_INDEX_BPP 0x3
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#define VBE_DISPI_INDEX_ENABLE 0x4
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#define VBE_DISPI_INDEX_BANK 0x5
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#define VBE_DISPI_INDEX_VIRT_WIDTH 0x6
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#define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7
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#define VBE_DISPI_INDEX_X_OFFSET 0x8
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#define VBE_DISPI_INDEX_Y_OFFSET 0x9
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#define VBE_DISPI_DISABLED 0x00
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#define VBE_DISPI_ENABLED 0x01
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#define VBE_DISPI_LFB_ENABLED 0x40
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#define BXVGA_DEV_IOCTL_SET_Y_OFFSET 1982
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#define BXVGA_DEV_IOCTL_SET_RESOLUTION 1985
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struct BXVGAResolution {
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int width;
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int height;
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};
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static BXVGADevice* s_the;
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BXVGADevice& BXVGADevice::the()
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{
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return *s_the;
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}
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BXVGADevice::BXVGADevice()
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: BlockDevice(82, 413)
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{
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s_the = this;
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m_framebuffer_address = PhysicalAddress(find_framebuffer_address());
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}
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void BXVGADevice::set_register(word index, word data)
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{
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IO::out16(VBE_DISPI_IOPORT_INDEX, index);
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IO::out16(VBE_DISPI_IOPORT_DATA, data);
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}
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void BXVGADevice::set_resolution(int width, int height)
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{
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set_register(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_DISABLED);
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set_register(VBE_DISPI_INDEX_XRES, (word)width);
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set_register(VBE_DISPI_INDEX_YRES, (word)height);
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set_register(VBE_DISPI_INDEX_VIRT_WIDTH, (word)width);
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set_register(VBE_DISPI_INDEX_VIRT_HEIGHT, (word)height * 2);
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set_register(VBE_DISPI_INDEX_BPP, 32);
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set_register(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED);
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set_register(VBE_DISPI_INDEX_BANK, 0);
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m_framebuffer_size = { width, height };
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}
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void BXVGADevice::set_y_offset(int offset)
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{
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ASSERT(offset <= m_framebuffer_size.height());
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set_register(VBE_DISPI_INDEX_Y_OFFSET, (word)offset);
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}
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dword BXVGADevice::find_framebuffer_address()
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{
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static const PCI::ID bochs_vga_id = { 0x1234, 0x1111 };
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static const PCI::ID virtualbox_vga_id = { 0x80ee, 0xbeef };
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dword framebuffer_address = 0;
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PCI::enumerate_all([&framebuffer_address] (const PCI::Address& address, PCI::ID id) {
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if (id == bochs_vga_id || id == virtualbox_vga_id) {
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framebuffer_address = PCI::get_BAR0(address) & 0xfffffff0;
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kprintf("BochsVGA: framebuffer @ P%x\n", framebuffer_address);
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}
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});
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return framebuffer_address;
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}
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Region* BXVGADevice::mmap(Process& process, LinearAddress preferred_laddr, size_t offset, size_t size)
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{
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ASSERT(offset == 0);
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ASSERT(size == framebuffer_size_in_bytes());
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auto vmo = VMObject::create_for_physical_range(framebuffer_address(), framebuffer_size_in_bytes());
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auto* region = process.allocate_region_with_vmo(
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preferred_laddr,
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framebuffer_size_in_bytes(),
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move(vmo),
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0,
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"BochsVGA Framebuffer",
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true, true);
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kprintf("BochsVGA: %s(%u) created Region{%p} with size %u for framebuffer P%x with laddr L%x\n",
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process.name().characters(), process.pid(),
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region, region->size(), framebuffer_address().as_ptr(), region->laddr().get());
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ASSERT(region);
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return region;
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}
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int BXVGADevice::ioctl(Process& process, unsigned request, unsigned arg)
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{
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switch (request) {
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case BXVGA_DEV_IOCTL_SET_Y_OFFSET:
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if (arg > (unsigned)m_framebuffer_size.height() * 2)
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return -EINVAL;
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set_y_offset((int)arg);
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return 0;
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case BXVGA_DEV_IOCTL_SET_RESOLUTION: {
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auto* resolution = (const BXVGAResolution*)arg;
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if (!process.validate_read_typed(resolution))
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return -EFAULT;
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set_resolution(resolution->width, resolution->height);
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return 0;
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}
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default:
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return -EINVAL;
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};
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}
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bool BXVGADevice::can_read(Process&) const
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{
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ASSERT_NOT_REACHED();
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}
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bool BXVGADevice::can_write(Process&) const
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{
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ASSERT_NOT_REACHED();
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}
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ssize_t BXVGADevice::read(Process&, byte*, size_t)
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{
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ASSERT_NOT_REACHED();
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}
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ssize_t BXVGADevice::write(Process&, const byte*, size_t)
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{
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ASSERT_NOT_REACHED();
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}
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