[u-boot.git] / examples / mem_to_mem_idma2intr.c

/* The dpalloc function used and implemented in this file was derieved
 * from PPCBoot/U-Boot file "cpu/mpc8260/commproc.c".
 */

/* Author: Arun Dharankar <[email protected]>
 * This example is meant to only demonstrate how the IDMA could be used.
 */

/*
 * This file is based on "arch/ppc/8260_io/commproc.c" - here is it's
 * copyright notice:
 *
 * General Purpose functions for the global management of the
 * 8260 Communication Processor Module.
 * Copyright (c) 1999 Dan Malek ([email protected])
 * Copyright (c) 2000 MontaVista Software, Inc ([email protected])
 *  2.3.99 Updates
 *
 * In addition to the individual control of the communication
 * channels, there are a few functions that globally affect the
 * communication processor.
 *
 * Buffer descriptors must be allocated from the dual ported memory
 * space.  The allocator for that is here.  When the communication
 * process is reset, we reclaim the memory available.  There is
 * currently no deallocator for this memory.
 */


#include <common.h>
#include <syscall.h>

#define STANDALONE

#ifndef STANDALONE			/* Linked into/Part of  PPCBoot */
#include <command.h>
#include <watchdog.h>
#else					/* Standalone app of PPCBoot */
#include <syscall.h>
#define printf	mon_printf
#define tstc	mon_tstc
#define getc	mon_getc
#define putc	mon_putc
#define udelay	mon_udelay
#define malloc	mon_malloc
#define WATCHDOG_RESET() {						\
			*(ushort *)(CFG_IMMR + 0x1000E) = 0x556c;	\
			*(ushort *)(CFG_IMMR + 0x1000E) = 0xaa39;	\
		}
#endif	/* STANDALONE */

static int debug = 1;

#define DEBUG(fmt, args...)	 {					\
	if(debug != 0) {						\
		printf("[%s %d %s]: ",__FILE__,__LINE__,__FUNCTION__);	\
		printf(fmt, ##args);					\
	}								\
}

#define CPM_CR_IDMA1_SBLOCK  (0x14)
#define CPM_CR_IDMA2_SBLOCK  (0x15)
#define CPM_CR_IDMA3_SBLOCK  (0x16)
#define CPM_CR_IDMA4_SBLOCK  (0x17)
#define CPM_CR_IDMA1_PAGE    (0x07)
#define CPM_CR_IDMA2_PAGE    (0x08)
#define CPM_CR_IDMA3_PAGE    (0x09)
#define CPM_CR_IDMA4_PAGE    (0x0a)
#define PROFF_IDMA1_BASE     ((uint)0x87fe)
#define PROFF_IDMA2_BASE     ((uint)0x88fe)
#define PROFF_IDMA3_BASE     ((uint)0x89fe)
#define PROFF_IDMA4_BASE     ((uint)0x8afe)

#define CPM_CR_INIT_TRX     ((ushort)0x0000)
#define CPM_CR_FLG  ((ushort)0x0001)

#define mk_cr_cmd(PG, SBC, MCN, OP) \
    ((PG << 26) | (SBC << 21) | (MCN << 6) | OP)


#pragma pack(1)
typedef struct ibdbits {
	unsigned b_valid:1;
	unsigned b_resv1:1;
	unsigned b_wrap:1;
	unsigned b_interrupt:1;
	unsigned b_last:1;
	unsigned b_resv2:1;
	unsigned b_cm:1;
	unsigned b_resv3:2;
	unsigned b_sdn:1;
	unsigned b_ddn:1;
	unsigned b_dgbl:1;
	unsigned b_dbo:2;
	unsigned b_resv4:1;
	unsigned b_ddtb:1;
	unsigned b_resv5:2;
	unsigned b_sgbl:1;
	unsigned b_sbo:2;
	unsigned b_resv6:1;
	unsigned b_sdtb:1;
	unsigned b_resv7:9;
} ibdbits_t;

#pragma pack(1)
typedef union ibdbitsu {
	ibdbits_t b;
	uint i;
} ibdbitsu_t;

#pragma pack(1)
typedef struct idma_buf_desc {
	ibdbitsu_t ibd_bits;		/* Status and Control */
	uint ibd_datlen;		/* Data length in buffer */
	uint ibd_sbuf;			/* Source buffer addr in host mem */
	uint ibd_dbuf;			/* Destination buffer addr in host mem */
} ibd_t;


#pragma pack(1)
typedef struct dcmbits {
	unsigned b_fb:1;
	unsigned b_lp:1;
	unsigned b_resv1:3;
	unsigned b_tc2:1;
	unsigned b_resv2:1;
	unsigned b_wrap:3;
	unsigned b_sinc:1;
	unsigned b_dinc:1;
	unsigned b_erm:1;
	unsigned b_dt:1;
	unsigned b_sd:2;
} dcmbits_t;

#pragma pack(1)
typedef union dcmbitsu {
	dcmbits_t b;
	ushort i;
} dcmbitsu_t;

#pragma pack(1)
typedef struct pram_idma {
	ushort pi_ibase;
	dcmbitsu_t pi_dcmbits;
	ushort pi_ibdptr;
	ushort pi_dprbuf;
	ushort pi_bufinv;		/* internal to CPM */
	ushort pi_ssmax;
	ushort pi_dprinptr;		/* internal to CPM */
	ushort pi_sts;
	ushort pi_dproutptr;		/* internal to CPM */
	ushort pi_seob;
	ushort pi_deob;
	ushort pi_dts;
	ushort pi_retadd;
	ushort pi_resv1;		/* internal to CPM */
	uint pi_bdcnt;
	uint pi_sptr;
	uint pi_dptr;
	uint pi_istate;
} pram_idma_t;


volatile immap_t *immap = (immap_t *) CFG_IMMR;
volatile ibd_t *bdf;
volatile pram_idma_t *piptr;

volatile int dmadone;
volatile int *dmadonep = &dmadone;
void dmadone_handler (void *);

int idma_init (void);
void idma_start (int, int, int, uint, uint, int);
uint dpalloc (uint, uint);


uint dpinit_done = 0;


#ifdef STANDALONE
int ctrlc (void)
{
	if (mon_tstc()) {
		switch (mon_getc ()) {
		case 0x03:		/* ^C - Control C */
			return 1;
		default:
			break;
		}
	}
	return 0;
}
void * memset(void * s,int c,size_t count)
{
	char *xs = (char *) s;
	while (count--)
		*xs++ = c;
	return s;
}
int memcmp(const void * cs,const void * ct,size_t count)
{
	const unsigned char *su1, *su2;
	int res = 0;
	for( su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
		if ((res = *su1 - *su2) != 0)
			break;
	return res;
}
#endif	/* STANDALONE */

#ifdef STANDALONE
int mem_to_mem_idma2intr (bd_t * bd, int argc, char *argv[])
#else
int do_idma (bd_t * bd, int argc, char *argv[])
#endif	/* STANDALONE */
{
	int i;

	dpinit_done = 0;

	idma_init ();

	DEBUG ("Installing dma handler\n");
	mon_install_hdlr (7, dmadone_handler, (void *) bdf);

	memset ((void *) 0x100000, 'a', 512);
	memset ((void *) 0x200000, 'b', 512);

	for (i = 0; i < 32; i++) {
		printf ("Startin IDMA, iteration=%d\n", i);
		idma_start (1, 1, 512, 0x100000, 0x200000, 3);
	}

	DEBUG ("Uninstalling dma handler\n");
	mon_free_hdlr (7);

	return 0;
}

void
idma_start (int sinc, int dinc, int sz, uint sbuf, uint dbuf, int ttype)
{
	/* ttype is for M-M, M-P, P-M or P-P: not used for now */

	piptr->pi_istate = 0;	/* manual says: clear it before every START_IDMA */
	piptr->pi_dcmbits.b.b_resv1 = 0;

	if (sinc == 1)
		piptr->pi_dcmbits.b.b_sinc = 1;
	else
		piptr->pi_dcmbits.b.b_sinc = 0;

	if (dinc == 1)
		piptr->pi_dcmbits.b.b_dinc = 1;
	else
		piptr->pi_dcmbits.b.b_dinc = 0;

	piptr->pi_dcmbits.b.b_erm = 0;
	piptr->pi_dcmbits.b.b_sd = 0x00;	/* M-M */

	bdf->ibd_sbuf = sbuf;
	bdf->ibd_dbuf = dbuf;
	bdf->ibd_bits.b.b_cm = 0;
	bdf->ibd_bits.b.b_interrupt = 1;
	bdf->ibd_bits.b.b_wrap = 1;
	bdf->ibd_bits.b.b_last = 1;
	bdf->ibd_bits.b.b_sdn = 0;
	bdf->ibd_bits.b.b_ddn = 0;
	bdf->ibd_bits.b.b_dgbl = 0;
	bdf->ibd_bits.b.b_ddtb = 0;
	bdf->ibd_bits.b.b_sgbl = 0;
	bdf->ibd_bits.b.b_sdtb = 0;
	bdf->ibd_bits.b.b_dbo = 1;
	bdf->ibd_bits.b.b_sbo = 1;
	bdf->ibd_bits.b.b_valid = 1;
	bdf->ibd_datlen = 512;

	*dmadonep = 0;

	immap->im_sdma.sdma_idmr2 = (uchar) 0xf;

	immap->im_cpm.cp_cpcr = mk_cr_cmd (CPM_CR_IDMA2_PAGE,
					   CPM_CR_IDMA2_SBLOCK, 0x0,
					   0x9) | 0x00010000;

	while (*dmadonep != 1) {
		if (ctrlc ()) {
			DEBUG ("\nInterrupted waiting for DMA interrupt.\n");
			goto done;
		}
		printf ("Waiting for DMA interrupt (dmadone=%d b_valid = %d)...\n",
			dmadone, bdf->ibd_bits.b.b_valid);
		udelay (1000000);
	}
	printf ("DMA complete notification received!\n");

  done:
	DEBUG ("memcmp(0x%08x, 0x%08x, 512) = %d\n",
		sbuf, dbuf, memcmp ((void *) sbuf, (void *) dbuf, 512));

	return;
}

#define MAX_INT_BUFSZ	64
#define DCM_WRAP	 0	/* MUST be consistant with MAX_INT_BUFSZ */

int idma_init (void)
{
	uint memaddr;

	immap->im_cpm.cp_rccr &= ~0x00F3FFFF;
	immap->im_cpm.cp_rccr |= 0x00A00A00;

	memaddr = dpalloc (sizeof (pram_idma_t), 64);

	*(volatile ushort *) &immap->im_dprambase[PROFF_IDMA2_BASE] = memaddr;
	piptr = (volatile pram_idma_t *) ((uint) (immap) + memaddr);

	piptr->pi_resv1 = 0;		/* manual says: clear it */
	piptr->pi_dcmbits.b.b_fb = 0;
	piptr->pi_dcmbits.b.b_lp = 1;
	piptr->pi_dcmbits.b.b_erm = 0;
	piptr->pi_dcmbits.b.b_dt = 0;

	memaddr = (uint) dpalloc (sizeof (ibd_t), 64);
	piptr->pi_ibase = piptr->pi_ibdptr = (volatile short) memaddr;
	bdf = (volatile ibd_t *) ((uint) (immap) + memaddr);
	bdf->ibd_bits.b.b_valid = 0;

	memaddr = (uint) dpalloc (64, 64);
	piptr->pi_dprbuf = (volatile ushort) memaddr;
	piptr->pi_dcmbits.b.b_wrap = 4;
	piptr->pi_ssmax = 32;

	piptr->pi_sts = piptr->pi_ssmax;
	piptr->pi_dts = piptr->pi_ssmax;

	return 1;
}

void dmadone_handler (void *arg)
{
	immap->im_sdma.sdma_idmr2 = (uchar) 0x0;

	*dmadonep = 1;

	return;
}


static uint dpbase = 0;

uint dpalloc (uint size, uint align)
{
	DECLARE_GLOBAL_DATA_PTR;

	volatile immap_t *immr = (immap_t *) CFG_IMMR;
	uint retloc;
	uint align_mask, off;
	uint savebase;

	/* Pointer to initial global data area */

	if (dpinit_done == 0) {
		dpbase = gd->dp_alloc_base;
		dpinit_done = 1;
	}

	align_mask = align - 1;
	savebase = dpbase;

	if ((off = (dpbase & align_mask)) != 0)
		dpbase += (align - off);

	if ((off = size & align_mask) != 0)
		size += align - off;

	if ((dpbase + size) >= gd->dp_alloc_top) {
		dpbase = savebase;
		printf ("dpalloc: ran out of dual port ram!");
		return 0;
	}

	retloc = dpbase;
	dpbase += size;

	memset ((void *) &immr->im_dprambase[retloc], 0, size);

	return (retloc);
}
Commit	Line	Data
3e38691e WD	1	/* The dpalloc function used and implemented in this file was derieved
	2	* from PPCBoot/U-Boot file "cpu/mpc8260/commproc.c".
	3	*/
	4
	5	/* Author: Arun Dharankar <[email protected]>
	6	* This example is meant to only demonstrate how the IDMA could be used.
	7	*/
	8
	9	/*
	10	* This file is based on "arch/ppc/8260_io/commproc.c" - here is it's
	11	* copyright notice:
	12	*
	13	* General Purpose functions for the global management of the
	14	* 8260 Communication Processor Module.
	15	* Copyright (c) 1999 Dan Malek ([email protected])
	16	* Copyright (c) 2000 MontaVista Software, Inc ([email protected])
	17	* 2.3.99 Updates
	18	*
	19	* In addition to the individual control of the communication
	20	* channels, there are a few functions that globally affect the
	21	* communication processor.
	22	*
	23	* Buffer descriptors must be allocated from the dual ported memory
	24	* space. The allocator for that is here. When the communication
	25	* process is reset, we reclaim the memory available. There is
	26	* currently no deallocator for this memory.
	27	*/
	28
	29
3e38691e WD	30	#include <common.h>
	31	#include <syscall.h>
	32
	33	#define STANDALONE
	34
	35	#ifndef STANDALONE /* Linked into/Part of PPCBoot */
	36	#include <command.h>
	37	#include <watchdog.h>
	38	#else /* Standalone app of PPCBoot */
	39	#include <syscall.h>
	40	#define printf mon_printf
	41	#define tstc mon_tstc
	42	#define getc mon_getc
	43	#define putc mon_putc
	44	#define udelay mon_udelay
	45	#define malloc mon_malloc
	46	#define WATCHDOG_RESET() { \
	47	(ushort )(CFG_IMMR + 0x1000E) = 0x556c; \
	48	(ushort )(CFG_IMMR + 0x1000E) = 0xaa39; \
	49	}
	50	#endif /* STANDALONE */
	51
	52	static int debug = 1;
	53
	54	#define DEBUG(fmt, args...) { \
	55	if(debug != 0) { \
	56	printf("[%s %d %s]: ",__FILE__,__LINE__,__FUNCTION__); \
	57	printf(fmt, ##args); \
	58	} \
	59	}
	60
	61	#define CPM_CR_IDMA1_SBLOCK (0x14)
	62	#define CPM_CR_IDMA2_SBLOCK (0x15)
	63	#define CPM_CR_IDMA3_SBLOCK (0x16)
	64	#define CPM_CR_IDMA4_SBLOCK (0x17)
	65	#define CPM_CR_IDMA1_PAGE (0x07)
	66	#define CPM_CR_IDMA2_PAGE (0x08)
	67	#define CPM_CR_IDMA3_PAGE (0x09)
	68	#define CPM_CR_IDMA4_PAGE (0x0a)
	69	#define PROFF_IDMA1_BASE ((uint)0x87fe)
	70	#define PROFF_IDMA2_BASE ((uint)0x88fe)
	71	#define PROFF_IDMA3_BASE ((uint)0x89fe)
	72	#define PROFF_IDMA4_BASE ((uint)0x8afe)
	73
	74	#define CPM_CR_INIT_TRX ((ushort)0x0000)
	75	#define CPM_CR_FLG ((ushort)0x0001)
	76
	77	#define mk_cr_cmd(PG, SBC, MCN, OP) \
	78	((PG << 26) \| (SBC << 21) \| (MCN << 6) \| OP)
	79
	80
	81	#pragma pack(1)
	82	typedef struct ibdbits {
	83	unsigned b_valid:1;
	84	unsigned b_resv1:1;
	85	unsigned b_wrap:1;
	86	unsigned b_interrupt:1;
	87	unsigned b_last:1;
	88	unsigned b_resv2:1;
	89	unsigned b_cm:1;
	90	unsigned b_resv3:2;
	91	unsigned b_sdn:1;
	92	unsigned b_ddn:1;
	93	unsigned b_dgbl:1;
94	unsigned b_dbo:2;
95	unsigned b_resv4:1;
96	unsigned b_ddtb:1;
97	unsigned b_resv5:2;
98	unsigned b_sgbl:1;
99	unsigned b_sbo:2;
100	unsigned b_resv6:1;
101	unsigned b_sdtb:1;
102	unsigned b_resv7:9;
103	} ibdbits_t;
104
105	#pragma pack(1)
106	typedef union ibdbitsu {
107	ibdbits_t b;
108	uint i;
109	} ibdbitsu_t;
110
111	#pragma pack(1)
112	typedef struct idma_buf_desc {
113	ibdbitsu_t ibd_bits; /* Status and Control */
114	uint ibd_datlen; /* Data length in buffer */
115	uint ibd_sbuf; /* Source buffer addr in host mem */
116	uint ibd_dbuf; /* Destination buffer addr in host mem */
117	} ibd_t;
118
119
120	#pragma pack(1)
121	typedef struct dcmbits {
122	unsigned b_fb:1;
123	unsigned b_lp:1;
124	unsigned b_resv1:3;
125	unsigned b_tc2:1;
126	unsigned b_resv2:1;
127	unsigned b_wrap:3;
128	unsigned b_sinc:1;
129	unsigned b_dinc:1;
130	unsigned b_erm:1;
131	unsigned b_dt:1;
132	unsigned b_sd:2;
133	} dcmbits_t;
134
135	#pragma pack(1)
136	typedef union dcmbitsu {
137	dcmbits_t b;
138	ushort i;
139	} dcmbitsu_t;
140
141	#pragma pack(1)
142	typedef struct pram_idma {
143	ushort pi_ibase;
144	dcmbitsu_t pi_dcmbits;
145	ushort pi_ibdptr;
146	ushort pi_dprbuf;
147	ushort pi_bufinv; /* internal to CPM */
148	ushort pi_ssmax;
149	ushort pi_dprinptr; /* internal to CPM */
150	ushort pi_sts;
151	ushort pi_dproutptr; /* internal to CPM */
152	ushort pi_seob;
153	ushort pi_deob;
154	ushort pi_dts;
155	ushort pi_retadd;
156	ushort pi_resv1; /* internal to CPM */
157	uint pi_bdcnt;
158	uint pi_sptr;
159	uint pi_dptr;
160	uint pi_istate;
161	} pram_idma_t;
162
163
164	volatile immap_t immap = (immap_t ) CFG_IMMR;
165	volatile ibd_t *bdf;
166	volatile pram_idma_t *piptr;
167
168	volatile int dmadone;
169	volatile int *dmadonep = &dmadone;
170	void dmadone_handler (void *);
171
172	int idma_init (void);
173	void idma_start (int, int, int, uint, uint, int);
174	uint dpalloc (uint, uint);
175
176
177	uint dpinit_done = 0;
178
179
180	#ifdef STANDALONE
181	int ctrlc (void)
182	{
183	if (mon_tstc()) {
184	switch (mon_getc ()) {
185	case 0x03: /* ^C - Control C */
186	return 1;
187	default:
188	break;
189	}
190	}
191	return 0;
192	}
193	void * memset(void * s,int c,size_t count)
194	{
195	char xs = (char ) s;
196	while (count--)
197	*xs++ = c;
198	return s;
199	}
200	int memcmp(const void * cs,const void * ct,size_t count)
201	{
202	const unsigned char su1, su2;
203	int res = 0;
204	for( su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
205	if ((res = su1 - su2) != 0)
206	break;
207	return res;
208	}
209	#endif /* STANDALONE */
210
211	#ifdef STANDALONE
212	int mem_to_mem_idma2intr (bd_t * bd, int argc, char *argv[])
213	#else
214	int do_idma (bd_t * bd, int argc, char *argv[])
215	#endif /* STANDALONE */
216	{
217	int i;
218
219	dpinit_done = 0;
220
221	idma_init ();
222
223	DEBUG ("Installing dma handler\n");
224	mon_install_hdlr (7, dmadone_handler, (void *) bdf);
225
226	memset ((void *) 0x100000, 'a', 512);
227	memset ((void *) 0x200000, 'b', 512);
228
229	for (i = 0; i < 32; i++) {
230	printf ("Startin IDMA, iteration=%d\n", i);
231	idma_start (1, 1, 512, 0x100000, 0x200000, 3);
232	}
233
234	DEBUG ("Uninstalling dma handler\n");
235	mon_free_hdlr (7);
236
237	return 0;
238	}
239
240	void
241	idma_start (int sinc, int dinc, int sz, uint sbuf, uint dbuf, int ttype)
242	{
243	/* ttype is for M-M, M-P, P-M or P-P: not used for now */
244
245	piptr->pi_istate = 0; /* manual says: clear it before every START_IDMA */
246	piptr->pi_dcmbits.b.b_resv1 = 0;
247
248	if (sinc == 1)
249	piptr->pi_dcmbits.b.b_sinc = 1;
250	else
251	piptr->pi_dcmbits.b.b_sinc = 0;
252
253	if (dinc == 1)
254	piptr->pi_dcmbits.b.b_dinc = 1;
255	else
256	piptr->pi_dcmbits.b.b_dinc = 0;
257
258	piptr->pi_dcmbits.b.b_erm = 0;
259	piptr->pi_dcmbits.b.b_sd = 0x00; /* M-M */
260
261	bdf->ibd_sbuf = sbuf;
262	bdf->ibd_dbuf = dbuf;
263	bdf->ibd_bits.b.b_cm = 0;
264	bdf->ibd_bits.b.b_interrupt = 1;
265	bdf->ibd_bits.b.b_wrap = 1;
266	bdf->ibd_bits.b.b_last = 1;
267	bdf->ibd_bits.b.b_sdn = 0;
268	bdf->ibd_bits.b.b_ddn = 0;
269	bdf->ibd_bits.b.b_dgbl = 0;
270	bdf->ibd_bits.b.b_ddtb = 0;
271	bdf->ibd_bits.b.b_sgbl = 0;
272	bdf->ibd_bits.b.b_sdtb = 0;
273	bdf->ibd_bits.b.b_dbo = 1;
274	bdf->ibd_bits.b.b_sbo = 1;
275	bdf->ibd_bits.b.b_valid = 1;
276	bdf->ibd_datlen = 512;
277
278	*dmadonep = 0;
279
280	immap->im_sdma.sdma_idmr2 = (uchar) 0xf;
281
282	immap->im_cpm.cp_cpcr = mk_cr_cmd (CPM_CR_IDMA2_PAGE,
283	CPM_CR_IDMA2_SBLOCK, 0x0,
284	0x9) \| 0x00010000;
285
286	while (*dmadonep != 1) {
287	if (ctrlc ()) {
288	DEBUG ("\nInterrupted waiting for DMA interrupt.\n");
289	goto done;
290	}
291	printf ("Waiting for DMA interrupt (dmadone=%d b_valid = %d)...\n",
292	dmadone, bdf->ibd_bits.b.b_valid);
293	udelay (1000000);
294	}
295	printf ("DMA complete notification received!\n");
296
297	done:
298	DEBUG ("memcmp(0x%08x, 0x%08x, 512) = %d\n",
299	sbuf, dbuf, memcmp ((void ) sbuf, (void ) dbuf, 512));
300
301	return;
302	}
303
304	#define MAX_INT_BUFSZ 64
305	#define DCM_WRAP 0 /* MUST be consistant with MAX_INT_BUFSZ */
306
307	int idma_init (void)
308	{
309	uint memaddr;
310
311	immap->im_cpm.cp_rccr &= ~0x00F3FFFF;
312	immap->im_cpm.cp_rccr \|= 0x00A00A00;
313
314	memaddr = dpalloc (sizeof (pram_idma_t), 64);
315
316	(volatile ushort ) &immap->im_dprambase[PROFF_IDMA2_BASE] = memaddr;
317	piptr = (volatile pram_idma_t *) ((uint) (immap) + memaddr);
318
319	piptr->pi_resv1 = 0; /* manual says: clear it */
320	piptr->pi_dcmbits.b.b_fb = 0;
321	piptr->pi_dcmbits.b.b_lp = 1;
322	piptr->pi_dcmbits.b.b_erm = 0;
323	piptr->pi_dcmbits.b.b_dt = 0;
324
325	memaddr = (uint) dpalloc (sizeof (ibd_t), 64);
326	piptr->pi_ibase = piptr->pi_ibdptr = (volatile short) memaddr;
327	bdf = (volatile ibd_t *) ((uint) (immap) + memaddr);
328	bdf->ibd_bits.b.b_valid = 0;
329
330	memaddr = (uint) dpalloc (64, 64);
331	piptr->pi_dprbuf = (volatile ushort) memaddr;
332	piptr->pi_dcmbits.b.b_wrap = 4;
333	piptr->pi_ssmax = 32;
334
335	piptr->pi_sts = piptr->pi_ssmax;
336	piptr->pi_dts = piptr->pi_ssmax;
337
338	return 1;
339	}
340
341	void dmadone_handler (void *arg)
342	{
343	immap->im_sdma.sdma_idmr2 = (uchar) 0x0;
344
345	*dmadonep = 1;
346
347	return;
348	}
349
350
351	static uint dpbase = 0;
352
353	uint dpalloc (uint size, uint align)
354	{
355	DECLARE_GLOBAL_DATA_PTR;
356
357	volatile immap_t immr = (immap_t ) CFG_IMMR;
358	uint retloc;
359	uint align_mask, off;
360	uint savebase;
361
362	/* Pointer to initial global data area */
363
364	if (dpinit_done == 0) {
365	dpbase = gd->dp_alloc_base;
366	dpinit_done = 1;
367	}
368
369	align_mask = align - 1;
370	savebase = dpbase;
371
372	if ((off = (dpbase & align_mask)) != 0)
373	dpbase += (align - off);
374
375	if ((off = size & align_mask) != 0)
376	size += align - off;
377
378	if ((dpbase + size) >= gd->dp_alloc_top) {
379	dpbase = savebase;
380	printf ("dpalloc: ran out of dual port ram!");
381	return 0;
382	}
383
384	retloc = dpbase;
385	dpbase += size;
386
387	memset ((void *) &immr->im_dprambase[retloc], 0, size);
388
389	return (retloc);
390	}