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wdenk 2002-04-01 17:47:25 +00:00
parent e85390dc1d
commit e881953f7d
1 changed files with 54 additions and 0 deletions
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54
cpu/mpc824x/drivers/i2c/i2c2.S Normal file
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/**************************************
*
* copyright @ Motorola, 1999
*
**************************************/
#include <config.h>
#ifdef CONFIG_HARD_I2C
#include <ppc_asm.tmpl>
#include <asm/mmu.h>
/**********************************************************
* function: load_runtime_reg
*
* input: r3 - value of eumbbar
* r4 - register offset in embedded utility space
*
* output: r3 - register content
**********************************************************/
.text
.align 2
.global load_runtime_reg
load_runtime_reg:
/* xor r5,r5,r5
* or r5,r5,r3
*
* lwbrx r3,r4,r5
*/
lwbrx r3,r4,r3
sync
bclr 20, 0
/****************************************************************
* function: store_runtime_reg
*
* input: r3 - value of eumbbar
* r4 - register offset in embedded utility space
* r5 - new value to be stored
*
****************************************************************/
.text
.align 2
.global store_runtime_reg
store_runtime_reg:
stwbrx r5, r4, r3
sync
bclr 20,0
#endif /* CONFIG_HARD_I2C */