arch/arm/mach-omap/syslib.c File Reference

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Detailed Description

FileName: arch/arm/mach-omap/syslib.c

Provide APIs which can be used from platform/architecture code to operate on

Originally from http://linux.omap.com/pub/bootloader/3430sdp/u-boot-v1.tar.gz

Functions
void	sdelay (unsigned long loops)
void	sr32 (u32 addr, u32 start_bit, u32 num_bits, u32 value)
u32	wait_on_value (u32 read_bit_mask, u32 match_value, u32 read_addr, u32 bound)

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Function Documentation

void sdelay

(

unsigned long

loops

)

simple spin loop

Will be constant time as its generally used in bypass conditions only. This is necessary until timers are accessible. if you need timed delays use mdelay or udelay instead

Parameters:

[in]

loops

number of loops

Returns:

void

Referenced by a_init(), and prcm_init().

void sr32	(	u32	addr,
		u32	start_bit,
		u32	num_bits,
		u32	value
	)

clear & set a value in a bit range for a 32 bit address

System Independent functions.

Parameters:

[in]	addr	Address to set/read from
[in]	start_bit	Where to put the value
[in]	num_bits	number of bits the value should be set
[in]	value	the value to set

Returns:

void

Referenced by prcm_init().

u32 wait_on_value	(	u32	read_bit_mask,
		u32	match_value,
		u32	read_addr,
		u32	bound
	)

common routine to allow waiting for changes in volatile regs.

Parameters:

[in]	read_bit_mask	the bit mask to read
[in]	match_value	match to which value
[in]	read_addr	address to read from
[in]	bound	max iterations

Returns:

1 if match_value is found, else if bound iterations reached, returns 0

Referenced by prcm_init().