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GPU: Add documentation.

This commit is contained in:
Tony Wasserka 2014-07-22 13:21:57 +02:00
parent 4b141791ed
commit 61e2ffd448
1 changed files with 14 additions and 2 deletions
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16
src/core/hw/gpu.h
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@ -84,11 +84,14 @@ struct Regs::Struct<Regs::FramebufferTop> {
union {
u32 active_fb;
// 0: Use parameters ending with "1"
// 1: Use parameters ending with "2"
BitField<0, 1, u32> second_fb_active;
};
u32 pad2[5];
// Distance between two pixel rows, in bytes
u32 stride;
u32 address_right1;
@ -132,23 +135,32 @@ struct Regs::Struct<Regs::DisplayTransfer> {
union {
u32 flags;
BitField< 0, 1, u32> flip_data;
BitField< 0, 1, u32> flip_data; // flips input data horizontally (TODO) if true
BitField< 8, 3, Format> input_format;
BitField<12, 3, Format> output_format;
BitField<16, 1, u32> output_tiled;
BitField<16, 1, u32> output_tiled; // stores output in a tiled format
};
u32 unknown;
// it seems that writing to this field triggers the display transfer
u32 trigger;
};
static_assert(sizeof(Regs::Struct<Regs::DisplayTransfer>) == 0x1C, "Structure size and register block length don't match");
template<>
struct Regs::Struct<Regs::CommandProcessor> {
// command list size
u32 size;
u32 pad0;
// command list address
u32 address;
u32 pad1;
// it seems that writing to this field triggers command list processing
u32 trigger;
};
static_assert(sizeof(Regs::Struct<Regs::CommandProcessor>) == 0x14, "Structure size and register block length don't match");