gpu.h File Reference

Barebones GPU communications driver. More...

#include "registers.h"
#include "enums.h"

Go to the source code of this file.

Macros
#define	GPUCMD_HEADER(incremental, mask, reg)   (((incremental)<<31)|(((mask)&0xF)<<16)|((reg)&0x3FF))
	Creates a GPU command header from its write increments, mask, and register.
#define	GPUCMD_AddMaskedWrite(reg, mask, val)   GPUCMD_AddSingleParam(GPUCMD_HEADER(0, (mask), (reg)), (val))
	Adds a masked register write to the current command buffer.
#define	GPUCMD_AddWrite(reg, val)   GPUCMD_AddMaskedWrite((reg), 0xF, (val))
	Adds a register write to the current command buffer.
#define	GPUCMD_AddMaskedWrites(reg, mask, vals, num)   GPUCMD_Add(GPUCMD_HEADER(0, (mask), (reg)), (vals), (num))
	Adds multiple masked register writes to the current command buffer.
#define	GPUCMD_AddWrites(reg, vals, num)   GPUCMD_AddMaskedWrites((reg), 0xF, (vals), (num))
	Adds multiple register writes to the current command buffer.
#define	GPUCMD_AddMaskedIncrementalWrites(reg, mask, vals, num)   GPUCMD_Add(GPUCMD_HEADER(1, (mask), (reg)), (vals), (num))
	Adds multiple masked incremental register writes to the current command buffer.
#define	GPUCMD_AddIncrementalWrites(reg, vals, num)   GPUCMD_AddMaskedIncrementalWrites((reg), 0xF, (vals), (num))
	Adds multiple incremental register writes to the current command buffer.

Functions
static void	GPUCMD_SetBuffer (u32 *adr, u32 size, u32 offset)
	Sets the GPU command buffer to use.
static void	GPUCMD_SetBufferOffset (u32 offset)
	Sets the offset of the GPU command buffer.
static void	GPUCMD_GetBuffer (u32 **addr, u32 *size, u32 *offset)
	Gets the current GPU command buffer.
void	GPUCMD_AddRawCommands (const u32 *cmd, u32 size)
	Adds raw GPU commands to the current command buffer.
void	GPUCMD_Add (u32 header, const u32 *param, u32 paramlength)
	Adds a GPU command to the current command buffer.
void	GPUCMD_Split (u32 **addr, u32 *size)
	Splits the current GPU command buffer.
u32	f32tof16 (float f)
	Converts a 32-bit float to a 16-bit float.
u32	f32tof20 (float f)
	Converts a 32-bit float to a 20-bit float.
u32	f32tof24 (float f)
	Converts a 32-bit float to a 24-bit float.
u32	f32tof31 (float f)
	Converts a 32-bit float to a 31-bit float.
static void	GPUCMD_AddSingleParam (u32 header, u32 param)
	Adds a command with a single parameter to the current command buffer.

Variables
u32 *	gpuCmdBuf
	GPU command buffer.
u32	gpuCmdBufSize
	GPU command buffer size.
u32	gpuCmdBufOffset
	GPU command buffer offset.

Detailed Description

Barebones GPU communications driver.

Function Documentation

f32tof16()

u32 f32tof16

(

float

f

)

Converts a 32-bit float to a 16-bit float.

Parameters

f	Float to convert.

Returns

The converted float.

f32tof20()

u32 f32tof20

(

float

f

)

Converts a 32-bit float to a 20-bit float.

Parameters

f	Float to convert.

Returns

The converted float.

f32tof24()

u32 f32tof24

(

float

f

)

Converts a 32-bit float to a 24-bit float.

Parameters

f	Float to convert.

Returns

The converted float.

f32tof31()

u32 f32tof31

(

float

f

)

Converts a 32-bit float to a 31-bit float.

Parameters

f	Float to convert.

Returns

The converted float.

GPUCMD_Add()

void GPUCMD_Add	(	u32	header,
		const u32 *	param,
		u32	paramlength
	)

Adds a GPU command to the current command buffer.

Parameters

header	Header of the command.
param	Parameters of the command.
paramlength	Size of the parameter buffer.

GPUCMD_AddRawCommands()

void GPUCMD_AddRawCommands	(	const u32 *	cmd,
		u32	size
	)

Adds raw GPU commands to the current command buffer.

Parameters

cmd	Buffer containing commands to add.
size	Size of the buffer.

GPUCMD_GetBuffer()

static void GPUCMD_GetBuffer ( u32 **  addr, u32 *  size, u32 *  offset  )

inlinestatic

Gets the current GPU command buffer.

Parameters

addr	Pointer to output the command buffer to.
size	Pointer to output the size (in words) of the command buffer to.
offset	Pointer to output the offset of the command buffer to.

GPUCMD_SetBuffer()

static void GPUCMD_SetBuffer ( u32 *  adr, u32  size, u32  offset  )

inlinestatic

Sets the GPU command buffer to use.

Parameters

adr	Pointer to the command buffer.
size	Size of the command buffer.
offset	Offset of the command buffer.

GPUCMD_SetBufferOffset()

static void GPUCMD_SetBufferOffset ( u32  offset )

inlinestatic

Sets the offset of the GPU command buffer.

Parameters

offset

Offset of the command buffer.

GPUCMD_Split()

void GPUCMD_Split	(	u32 **	addr,
		u32 *	size
	)

Splits the current GPU command buffer.

Parameters

addr	Pointer to output the command buffer to.
size	Pointer to output the size (in words) of the command buffer to.