ahbm.h File Reference

AHBM (ARM AMBA AHB bus) utilities. More...

#include <teak/types.h>

Macros
#define	AHBM_CH_CFG2_READ   (0 << 8)
	Read external memory.
#define	AHBM_CH_CFG2_WRITE   (1 << 8)
	HWRITE. Write external memory.
#define	REG_AHBM_CH_CFG1(n)   (*(vu16 *)(0x80E2 + 6 * (n)))
	AHBM Channel 0..2 Configure Burst/Data (R/W)
#define	REG_AHBM_CH_CFG2(n)   (*(vu16 *)(0x80E4 + 6 * (n)))
	AHBM Channel 0..2 Configure Whatever (R/W)
#define	REG_AHBM_CH_CFG_DMA(n)   (*(vu16 *)(0x80E6 + 6 * (n)))
	AHBM Channel 0..2 Configure DMA (R/W)
#define	REG_AHBM_STATUS   (*(vu16 *)0x80E0)
	AHBM Status (R)

Functions
static void	ahbmConfigChannel (int channel, u16 a, u16 b, u16 dma_channel_mask)
	Sets up an AHBM channel.
static u16	ahbmIsBusy (void)
	Checks whether any AHBM channel is busy.
static void	ahbmResetChannel (int channel)
	Resets an AHBM channel.

Detailed Description

AHBM (ARM AMBA AHB bus) utilities.

For more information about the meaning of all of the concepts in this file, check the document "AMBA AHB Protocol Specification" from ARM: "ARM IHI 0033C (ID090921)".

Function Documentation

ahbmConfigChannel()

static void ahbmConfigChannel ( int  channel, u16  a, u16  b, u16  dma_channel_mask  )

inlinestatic

Sets up an AHBM channel.

Parameters

channel	The AHBM channel to setup.
a	First configuration setting.
b	Second configuration setting.
dma_channel_mask	The DMA channels to assign to this AHBM channel.

ahbmIsBusy()

static u16 ahbmIsBusy ( void  )

inlinestatic

Checks whether any AHBM channel is busy.

Returns

Returns 1 if any AHBM channel is busy, 0 otherwise.

ahbmResetChannel()

static void ahbmResetChannel ( int  channel )

inlinestatic

Resets an AHBM channel.

Parameters

channel

The AHBM channel to setup.