rsp.c File Reference

Low-level RSP hardware library. More...

Functions
	DEFINE_RSP_UCODE (rsp_crash)
void	rsp_init (void)
	Initialize the RSP subsytem.
void	rsp_load (rsp_ucode_t *ucode)
	Load a RSP ucode.
void	rsp_load_code (void *start, unsigned long size, unsigned int imem_offset)
	Do a DMA transfer to load a piece of code into RSP IMEM.
void	rsp_load_data (void *start, unsigned long size, unsigned int dmem_offset)
	Do a DMA transfer to load a piece of data into RSP DMEM.
void	rsp_read_code (void *start, unsigned long size, unsigned int imem_offset)
	Do a DMA transfer to load a piece of code from RSP IMEM to RDRAM.
void	rsp_read_data (void *start, unsigned long size, unsigned int dmem_offset)
	Do a DMA transfer to load a piece of data from RSP DMEM to RDRAM.
void	__rsp_run_async (uint32_t status_flags)
	Internal implementation of rsp_run_async.
void	rsp_wait (void)
	Wait until RSP has finished processing.
void	rsp_run (void)
	Run RSP ucode.
void	rsp_run_async (void)
	Run RSP async.

Detailed Description

Low-level RSP hardware library.

Function Documentation

DEFINE_RSP_UCODE()

DEFINE_RSP_UCODE

(

rsp_crash

)

RSP crash handler ucode (rsp_crash.S)

rsp_load()

void rsp_load

(

rsp_ucode_t *

ucode

)

Load a RSP ucode.

This function allows to load a RSP ucode into the RSP internal memory. The function executes the transfer right away, so it is responsibility of the caller making sure that it's a good time to do it.

The function internally keeps a pointer to the last loaded ucode. If the ucode passed is the same, it does nothing. This makes it easier to write code that optimistically switches between different ucodes, but without forcing transfers every time.

Parameters

[in]

ucode

Ucode to load into RSP

rsp_load_code()

void rsp_load_code	(	void *	code,
		unsigned long	size,
		unsigned int	imem_offset
	)

Do a DMA transfer to load a piece of code into RSP IMEM.

This is a lower-level function that actually executes a DMA transfer from RDRAM to IMEM. Prefer using rsp_load instead.

Note

in order for this function to be interoperable with rsp_load, it will reset the last loaded ucode cache.

Parameters

[in]	code	Pointer to buffer in RDRAM containing code. Must be aligned to 8 bytes.
[in]	size	Size of the code to load. Must be a multiple of 8.
[in]	imem_offset	Byte offset in IMEM where to load the code. Must be a multiple of 8.

rsp_load_data()

void rsp_load_data	(	void *	data,
		unsigned long	size,
		unsigned int	dmem_offset
	)

Do a DMA transfer to load a piece of data into RSP DMEM.

This is a lower-level function that actually executes a DMA transfer from RDRAM to DMEM. Prefer using rsp_load instead.

Parameters

[in]	data	Pointer to buffer in RDRAM containing data. Must be aligned to 8 bytes.
[in]	size	Size of the data to load. Must be a multiple of 8.
[in]	dmem_offset	Offset in DMEM where to load the code. Must be a multiple of 8.

rsp_read_code()

void rsp_read_code	(	void *	code,
		unsigned long	size,
		unsigned int	imem_offset
	)

Do a DMA transfer to load a piece of code from RSP IMEM to RDRAM.

This is a lower-level function that actually executes a DMA transfer from IMEM to RDRAM.

Parameters

[in]	code	Pointer to buffer in RDRAM where to write code. Must be aligned to 8 bytes.
[in]	size	Size of the code to load. Must be a multiple of 8.
[in]	imem_offset	Byte offset in IMEM where where the code will be loaded from. Must be a multiple of 8.

rsp_read_data()

void rsp_read_data	(	void *	data,
		unsigned long	size,
		unsigned int	dmem_offset
	)

Do a DMA transfer to load a piece of data from RSP DMEM to RDRAM.

This is a lower-level function that actually executes a DMA transfer from DMEM to RDRAM.

Parameters

[in]	data	Pointer to buffer in RDRAM where to write data. Must be aligned to 8 bytes.
[in]	size	Size of the data to load. Must be a multiple of 8.
[in]	dmem_offset	Byte offset in IMEM where where the data will be loaded from. Must be a multiple of 8.

rsp_wait()

void rsp_wait

(

void

)

Wait until RSP has finished processing.

This function will wait until the RSP is halted. It contains a fixed timeout of 500 ms, after which rsp_crash is invoked to abort the program.

rsp_run()

void rsp_run

(

void

)

Run RSP ucode.

This function starts running the RSP, and wait until the ucode is finished.

rsp_run_async()

void rsp_run_async ( void  )

externinline

Run RSP async.

This function starts running the RSP in background. Use rsp_wait() to synchronize later.