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Kernel: Rename create_framebuffer_wrapper() to create_for_physical_range().

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Maybe there will be other types of physical ranges to map in the future.
This API doesn't seem at all specific to framebuffers.
Also tidy up a bit in BochsVGADevice.
This commit is contained in:
Andreas Kling 2019-02-16 10:58:15 +01:00
parent 7210d2ade5
commit 4db78dabd3
3 changed files with 31 additions and 22 deletions
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49
Kernel/BochsVGADevice.cpp
View file

@ -43,19 +43,6 @@ BochsVGADevice::BochsVGADevice()
m_framebuffer_address = PhysicalAddress(find_framebuffer_address());
}
Region* BochsVGADevice::mmap(Process& process, LinearAddress preferred_laddr, size_t offset, size_t size)
{
ASSERT(offset == 0);
ASSERT(size == framebuffer_size_in_bytes());
auto framebuffer_vmo = VMObject::create_framebuffer_wrapper(framebuffer_address(), framebuffer_size_in_bytes());
auto* region = process.allocate_region_with_vmo(preferred_laddr, framebuffer_size_in_bytes(), move(framebuffer_vmo), 0, "BochsVGADevice Framebuffer", true, true);
kprintf("BochsVGADevice::mmap for %s(%u) mapped region %p for fb addr %p\n",
process.name().characters(), process.pid(),
region, framebuffer_address());
ASSERT(region);
return region;
}
void BochsVGADevice::set_register(word index, word data)
{
IO::out16(VBE_DISPI_IOPORT_INDEX, index);
@ -65,10 +52,10 @@ void BochsVGADevice::set_register(word index, word data)
void BochsVGADevice::set_resolution(int width, int height)
{
set_register(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_DISABLED);
set_register(VBE_DISPI_INDEX_XRES, width);
set_register(VBE_DISPI_INDEX_YRES, height);
set_register(VBE_DISPI_INDEX_VIRT_WIDTH, width);
set_register(VBE_DISPI_INDEX_VIRT_HEIGHT, height * 2);
set_register(VBE_DISPI_INDEX_XRES, (word)width);
set_register(VBE_DISPI_INDEX_YRES, (word)height);
set_register(VBE_DISPI_INDEX_VIRT_WIDTH, (word)width);
set_register(VBE_DISPI_INDEX_VIRT_HEIGHT, (word)height * 2);
set_register(VBE_DISPI_INDEX_BPP, 32);
set_register(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED);
set_register(VBE_DISPI_INDEX_BANK, 0);
@ -78,7 +65,8 @@ void BochsVGADevice::set_resolution(int width, int height)
void BochsVGADevice::set_y_offset(int offset)
{
set_register(VBE_DISPI_INDEX_Y_OFFSET, offset);
ASSERT(offset <= m_framebuffer_size.height());
set_register(VBE_DISPI_INDEX_Y_OFFSET, (word)offset);
}
dword BochsVGADevice::find_framebuffer_address()
@ -95,11 +83,32 @@ dword BochsVGADevice::find_framebuffer_address()
return framebuffer_address;
}
int BochsVGADevice::ioctl(Process& process, unsigned int request, unsigned int arg)
Region* BochsVGADevice::mmap(Process& process, LinearAddress preferred_laddr, size_t offset, size_t size)
{
ASSERT(offset == 0);
ASSERT(size == framebuffer_size_in_bytes());
auto vmo = VMObject::create_for_physical_range(framebuffer_address(), framebuffer_size_in_bytes());
auto* region = process.allocate_region_with_vmo(
preferred_laddr,
framebuffer_size_in_bytes(),
move(vmo),
0,
"BochsVGA Framebuffer",
true, true);
kprintf("BochsVGA: %s(%u) created Region{%p} for framebuffer P%x\n",
process.name().characters(), process.pid(),
region, framebuffer_address().as_ptr());
ASSERT(region);
return region;
}
int BochsVGADevice::ioctl(Process& process, unsigned request, unsigned arg)
{
switch (request) {
case BXVGA_DEV_IOCTL_SET_Y_OFFSET:
set_y_offset(arg);
if (arg > (unsigned)m_framebuffer_size.height() * 2)
return -EINVAL;
set_y_offset((int)arg);
return 0;
case BXVGA_DEV_IOCTL_SET_RESOLUTION: {
auto* resolution = (const BXVGAResolution*)arg;

2
Kernel/MemoryManager.cpp
View file

@ -683,7 +683,7 @@ RetainPtr<VMObject> VMObject::create_anonymous(size_t size)
return adopt(*new VMObject(size));
}
RetainPtr<VMObject> VMObject::create_framebuffer_wrapper(PhysicalAddress paddr, size_t size)
RetainPtr<VMObject> VMObject::create_for_physical_range(PhysicalAddress paddr, size_t size)
{
size = ceil_div(size, PAGE_SIZE) * PAGE_SIZE;
auto vmo = adopt(*new VMObject(paddr, size));

2
Kernel/MemoryManager.h
View file

@ -83,7 +83,7 @@ class VMObject : public Retainable<VMObject>, public Weakable<VMObject> {
public:
static RetainPtr<VMObject> create_file_backed(RetainPtr<Inode>&&);
static RetainPtr<VMObject> create_anonymous(size_t);
static RetainPtr<VMObject> create_framebuffer_wrapper(PhysicalAddress, size_t);
static RetainPtr<VMObject> create_for_physical_range(PhysicalAddress, size_t);
RetainPtr<VMObject> clone();
~VMObject();