[people/ms/u-boot.git] / board / rsdproto / flash_asm.S

/*
 * -*- mode:c -*-
 *
 * (C) Copyright 2000
 * Marius Groeger <mgroeger@sysgo.de>
 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 *
 * void ull_write(unsigned long long volatile *address,
 *                unsigned long long volatile *data)
 * r3 = address
 * r4 = data
 *
 * void ull_read(unsigned long long volatile *address,
 *                unsigned long long volatile *data)
 * r3 = address
 * r4 = data
 *
 * Uses the floating point unit to read and write 64 bit wide
 * data (unsigned long long) on the 60x bus. This is necessary
 * because all 4 flash chips use the /WE line from byte lane 0
 *
 * IMPORTANT: data should always be 8-aligned, otherwise an exception will
 * occur.
 */

#include <ppc_asm.tmpl>
#include <ppc_defs.h>

	.globl	ull_write
ull_write:
	lfd		0,0(r4)
	stfd	0,0(r3)
	blr

	.globl	ull_read
ull_read:
	lfd		0, 0(r3)
	stfd	0, 0(r4)
	blr
Commit	Line	Data
4a5b6a35 WD	1	/*
	2	* -- mode:c --
	3	*
	4	* (C) Copyright 2000
	5	* Marius Groeger <mgroeger@sysgo.de>
	6	* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	7	*
	8	* void ull_write(unsigned long long volatile *address,
	9	* unsigned long long volatile *data)
	10	* r3 = address
	11	* r4 = data
	12	*
	13	* void ull_read(unsigned long long volatile *address,
	14	* unsigned long long volatile *data)
	15	* r3 = address
	16	* r4 = data
	17	*
	18	* Uses the floating point unit to read and write 64 bit wide
	19	* data (unsigned long long) on the 60x bus. This is necessary
	20	* because all 4 flash chips use the /WE line from byte lane 0
	21	*
	22	* IMPORTANT: data should always be 8-aligned, otherwise an exception will
	23	* occur.
	24	*/
	25
	26	#include <ppc_asm.tmpl>
	27	#include <ppc_defs.h>
	28
993cad93	29	.globl ull_write
4a5b6a35 WD	30	ull_write:
	31	lfd 0,0(r4)
	32	stfd 0,0(r3)
	33	blr
	34
	35	.globl ull_read
	36	ull_read:
	37	lfd 0, 0(r3)
	38	stfd 0, 0(r4)
	39	blr