Head. s analysis (6): Stack pointer Initialization

 

Happy shrimp

Http://blog.csdn.net/lights_joy/

Lights@hb165.com

This article applies

ADI bf561 DSP

Uclinux-2008r1.5-rc3 (ported to vdsp5)

Visual DSP ++ 5.0 (Update 5)

Reprinted, but keep the author information

 

/* Initialize Stack pointer */

Sp. L = Lo (initial_stack );

Sp. H = Hi (initial_stack );

Fp = sp;

USP = sp;

At the beginning of kernel startup, a series of function calls are also required. Therefore, stacks must be used.

Set it to initial_stack, and its value is defined:

# Define initial_stack 0xffb01000

That is, the highest position of L1 scratchpad SRAM (4 K.

 

1 References

Head. s analysis (1): Save the pointer passed by U-boot)

Head. s analysis (2): syscfg configuration)

Head. s analysis (3): clear data and pointer register 0)

Head. s analysis (4): Disable cache)

Head. s analysis (5): Disable the serial port)