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Kernel: Make BochsVGADevice a BlockDevice and support mmapping it.

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Currently you can only mmap the entire framebuffer.
Using this when starting up the WindowServer gets us yet another step
closer towards it moving into userspace. :^)
This commit is contained in:
Andreas Kling 2019-02-16 09:57:42 +01:00
parent 2dc7c5a7b0
commit 799177feda
15 changed files with 155 additions and 26 deletions
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16
Kernel/FileDescriptor.h
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@ -12,6 +12,8 @@
class TTY;
class MasterPTY;
class Process;
class Region;
class CharacterDevice;
class FileDescriptor : public Retainable<FileDescriptor> {
public:
@ -43,9 +45,14 @@ public:
bool is_directory() const;
bool is_character_device() const { return m_device.ptr(); }
Device* character_device() { return m_device.ptr(); }
const Device* character_device() const { return m_device.ptr(); }
bool is_device() const { return m_device.ptr(); }
Device* device() { return m_device.ptr(); }
const Device* device() const { return m_device.ptr(); }
bool is_block_device() const;
bool is_character_device() const;
CharacterDevice* character_device();
const CharacterDevice* character_device() const;
bool is_tty() const;
const TTY* tty() const;
@ -59,7 +66,8 @@ public:
Inode* inode() { return m_inode.ptr(); }
const Inode* inode() const { return m_inode.ptr(); }
bool supports_mmap() const { return m_inode && !m_device; }
bool supports_mmap() const;
Region* mmap(Process&, LinearAddress, size_t offset, size_t, int prot);
bool is_blocking() const { return m_is_blocking; }
void set_blocking(bool b) { m_is_blocking = b; }