diff options
Diffstat (limited to 'src/core/hw/gpu.h')
| -rw-r--r-- | src/core/hw/gpu.h | 297 |
1 files changed, 189 insertions, 108 deletions
diff --git a/src/core/hw/gpu.h b/src/core/hw/gpu.h index 42f18a0e..3065da89 100644 --- a/src/core/hw/gpu.h +++ b/src/core/hw/gpu.h @@ -4,32 +4,57 @@ #pragma once +#include <cstddef> + #include "common/common_types.h" #include "common/bit_field.h" -#include "common/register_set.h" namespace GPU { static const u32 kFrameCycles = 268123480 / 60; ///< 268MHz / 60 frames per second static const u32 kFrameTicks = kFrameCycles / 3; ///< Approximate number of instructions/frame +// Returns index corresponding to the Regs member labeled by field_name +// TODO: Due to Visual studio bug 209229, offsetof does not return constant expressions +// when used with array elements (e.g. GPU_REG_INDEX(memory_fill_config[0])). +// For details cf. https://connect.microsoft.com/VisualStudio/feedback/details/209229/offsetof-does-not-produce-a-constant-expression-for-array-members +// Hopefully, this will be fixed sometime in the future. +// For lack of better alternatives, we currently hardcode the offsets when constant +// expressions are needed via GPU_REG_INDEX_WORKAROUND (on sane compilers, static_asserts +// will then make sure the offsets indeed match the automatically calculated ones). +#define GPU_REG_INDEX(field_name) (offsetof(GPU::Regs, field_name) / sizeof(u32)) +#if defined(_MSC_VER) +#define GPU_REG_INDEX_WORKAROUND(field_name, backup_workaround_index) (backup_workaround_index) +#else +// NOTE: Yeah, hacking in a static_assert here just to workaround the lacking MSVC compiler +// really is this annoying. This macro just forwards its first argument to GPU_REG_INDEX +// and then performs a (no-op) cast to size_t iff the second argument matches the expected +// field offset. Otherwise, the compiler will fail to compile this code. +#define GPU_REG_INDEX_WORKAROUND(field_name, backup_workaround_index) \ + ((typename std::enable_if<backup_workaround_index == GPU_REG_INDEX(field_name), size_t>::type)GPU_REG_INDEX(field_name)) +#endif + // MMIO region 0x1EFxxxxx struct Regs { - enum Id : u32 { - MemoryFill = 0x00004, // + 5,6,7; second block at 8-11 - - FramebufferTop = 0x00117, // + 11a,11b,11c,11d(?),11e...126 - FramebufferBottom = 0x00157, // + 15a,15b,15c,15d(?),15e...166 - - DisplayTransfer = 0x00300, // + 301,302,303,304,305,306 - - CommandProcessor = 0x00638, // + 63a,63c - NumIds = 0x01000 - }; - - template<Id id> - struct Struct; +// helper macro to properly align structure members. +// Calling INSERT_PADDING_WORDS will add a new member variable with a name like "pad121", +// depending on the current source line to make sure variable names are unique. +#define INSERT_PADDING_WORDS_HELPER1(x, y) x ## y +#define INSERT_PADDING_WORDS_HELPER2(x, y) INSERT_PADDING_WORDS_HELPER1(x, y) +#define INSERT_PADDING_WORDS(num_words) u32 INSERT_PADDING_WORDS_HELPER2(pad, __LINE__)[(num_words)]; + +// helper macro to make sure the defined structures are of the expected size. +#if defined(_MSC_VER) +// TODO: MSVC does not support using sizeof() on non-static data members even though this +// is technically allowed since C++11. This macro should be enabled once MSVC adds +// support for that. +#define ASSERT_MEMBER_SIZE(name, size_in_bytes) +#else +#define ASSERT_MEMBER_SIZE(name, size_in_bytes) \ + static_assert(sizeof(name) == size_in_bytes, \ + "Structure size and register block length don't match"); +#endif enum class FramebufferFormat : u32 { RGBA8 = 0, @@ -38,135 +63,191 @@ struct Regs { RGB5A1 = 3, RGBA4 = 4, }; -}; -template<> -struct Regs::Struct<Regs::MemoryFill> { - u32 address_start; - u32 address_end; // ? - u32 size; - u32 value; // ? + INSERT_PADDING_WORDS(0x4); - inline u32 GetStartAddress() const { - return address_start * 8; - } + struct { + u32 address_start; + u32 address_end; // ? + u32 size; + u32 value; // ? - inline u32 GetEndAddress() const { - return address_end * 8; - } -}; -static_assert(sizeof(Regs::Struct<Regs::MemoryFill>) == 0x10, "Structure size and register block length don't match"); + inline u32 GetStartAddress() const { + return DecodeAddressRegister(address_start); + } -template<> -struct Regs::Struct<Regs::FramebufferTop> { - using Format = Regs::FramebufferFormat; + inline u32 GetEndAddress() const { + return DecodeAddressRegister(address_end); + } + } memory_fill_config[2]; + ASSERT_MEMBER_SIZE(memory_fill_config[0], 0x10); - union { - u32 size; + INSERT_PADDING_WORDS(0x10b); - BitField< 0, 16, u32> width; - BitField<16, 16, u32> height; - }; + struct { + using Format = Regs::FramebufferFormat; - u32 pad0[2]; + union { + u32 size; - u32 address_left1; - u32 address_left2; + BitField< 0, 16, u32> width; + BitField<16, 16, u32> height; + }; - union { - u32 format; + INSERT_PADDING_WORDS(0x2); - BitField< 0, 3, Format> color_format; - }; + u32 address_left1; + u32 address_left2; - u32 pad1; + union { + u32 format; - union { - u32 active_fb; + BitField< 0, 3, Format> color_format; + }; - // 0: Use parameters ending with "1" - // 1: Use parameters ending with "2" - BitField<0, 1, u32> second_fb_active; - }; + INSERT_PADDING_WORDS(0x1); - u32 pad2[5]; + union { + u32 active_fb; - // Distance between two pixel rows, in bytes - u32 stride; + // 0: Use parameters ending with "1" + // 1: Use parameters ending with "2" + BitField<0, 1, u32> second_fb_active; + }; - u32 address_right1; - u32 address_right2; -}; + INSERT_PADDING_WORDS(0x5); -template<> -struct Regs::Struct<Regs::FramebufferBottom> : public Regs::Struct<Regs::FramebufferTop> { -}; -static_assert(sizeof(Regs::Struct<Regs::FramebufferTop>) == 0x40, "Structure size and register block length don't match"); + // Distance between two pixel rows, in bytes + u32 stride; -template<> -struct Regs::Struct<Regs::DisplayTransfer> { - using Format = Regs::FramebufferFormat; + u32 address_right1; + u32 address_right2; - u32 input_address; - u32 output_address; + INSERT_PADDING_WORDS(0x30); + } framebuffer_config[2]; + ASSERT_MEMBER_SIZE(framebuffer_config[0], 0x100); - inline u32 GetPhysicalInputAddress() const { - return input_address * 8; - } + INSERT_PADDING_WORDS(0x169); - inline u32 GetPhysicalOutputAddress() const { - return output_address * 8; - } + struct { + using Format = Regs::FramebufferFormat; - union { - u32 output_size; + u32 input_address; + u32 output_address; - BitField< 0, 16, u32> output_width; - BitField<16, 16, u32> output_height; - }; + inline u32 GetPhysicalInputAddress() const { + return DecodeAddressRegister(input_address); + } - union { - u32 input_size; + inline u32 GetPhysicalOutputAddress() const { + return DecodeAddressRegister(output_address); + } - BitField< 0, 16, u32> input_width; - BitField<16, 16, u32> input_height; - }; + union { + u32 output_size; - union { - u32 flags; + BitField< 0, 16, u32> output_width; + BitField<16, 16, u32> output_height; + }; - 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; // stores output in a tiled format - }; + union { + u32 input_size; - u32 unknown; + BitField< 0, 16, u32> input_width; + BitField<16, 16, u32> input_height; + }; - // 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"); + union { + u32 flags; -template<> -struct Regs::Struct<Regs::CommandProcessor> { - // command list size - u32 size; + 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; // stores output in a tiled format + }; - u32 pad0; + INSERT_PADDING_WORDS(0x1); - // command list address - u32 address; + // it seems that writing to this field triggers the display transfer + u32 trigger; + } display_transfer_config; + ASSERT_MEMBER_SIZE(display_transfer_config, 0x1c); - u32 pad1; + INSERT_PADDING_WORDS(0x331); - // 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"); + struct { + // command list size + u32 size; + + INSERT_PADDING_WORDS(0x1); + + // command list address + u32 address; + + INSERT_PADDING_WORDS(0x1); + + // it seems that writing to this field triggers command list processing + u32 trigger; + inline u32 GetPhysicalAddress() const { + return DecodeAddressRegister(address); + } + } command_processor_config; + ASSERT_MEMBER_SIZE(command_processor_config, 0x14); -extern RegisterSet<u32, Regs> g_regs; + INSERT_PADDING_WORDS(0x9c3); + +#undef INSERT_PADDING_WORDS_HELPER1 +#undef INSERT_PADDING_WORDS_HELPER2 +#undef INSERT_PADDING_WORDS + + static inline int NumIds() { + return sizeof(Regs) / sizeof(u32); + } + + u32& operator [] (int index) const { + u32* content = (u32*)this; + return content[index]; + } + + u32& operator [] (int index) { + u32* content = (u32*)this; + return content[index]; + } + +private: + /* + * Most physical addresses which GPU registers refer to are 8-byte aligned. + * This function should be used to get the address from a raw register value. + */ + static inline u32 DecodeAddressRegister(u32 register_value) { + return register_value * 8; + } +}; +static_assert(std::is_standard_layout<Regs>::value, "Structure does not use standard layout"); + +// TODO: MSVC does not support using offsetof() on non-static data members even though this +// is technically allowed since C++11. This macro should be enabled once MSVC adds +// support for that. +#ifndef _MSC_VER +#define ASSERT_REG_POSITION(field_name, position) \ + static_assert(offsetof(Regs, field_name) == position * 4, \ + "Field "#field_name" has invalid position") + +ASSERT_REG_POSITION(memory_fill_config[0], 0x00004); +ASSERT_REG_POSITION(memory_fill_config[1], 0x00008); +ASSERT_REG_POSITION(framebuffer_config[0], 0x00117); +ASSERT_REG_POSITION(framebuffer_config[1], 0x00157); +ASSERT_REG_POSITION(display_transfer_config, 0x00300); +ASSERT_REG_POSITION(command_processor_config, 0x00638); + +#undef ASSERT_REG_POSITION +#endif // !defined(_MSC_VER) + +// The total number of registers is chosen arbitrarily, but let's make sure it's not some odd value anyway. +static_assert(sizeof(Regs) == 0x1000 * sizeof(u32), "Invalid total size of register set"); + +extern Regs g_regs; enum { TOP_ASPECT_X = 0x5, |