--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/ps3/spulibs/fb_writer.c	Fri May 29 09:50:21 2009 +0000
@@ -0,0 +1,193 @@
+/*
+ * SDL - Simple DirectMedia Layer
+ * CELL BE Support for PS3 Framebuffer
+ * Copyright (C) 2008, 2009 International Business Machines Corporation
+ *
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
+ * USA
+ *
+ *  Martin Lowinski  <lowinski [at] de [dot] ibm [ibm] com>
+ *  Dirk Herrendoerfer <d.herrendoerfer [at] de [dot] ibm [dot] com>
+ *  SPE code based on research by:
+ *  Rene Becker
+ *  Thimo Emmerich
+ */
+
+#include "spu_common.h"
+
+#include <spu_intrinsics.h>
+#include <spu_mfcio.h>
+#include <stdio.h>
+#include <string.h>
+
+// Debugging
+//#define DEBUG
+
+#ifdef DEBUG
+#define deprintf(fmt, args... ) \
+	fprintf( stdout, fmt, ##args ); \
+	fflush( stdout );
+#else
+#define deprintf( fmt, args... )
+#endif
+
+void cpy_to_fb(unsigned int);
+
+/* fb_writer_spu parms */
+static volatile struct fb_writer_parms_t parms __attribute__ ((aligned(128)));
+
+/* Code running on SPU */
+int main(unsigned long long spe_id __attribute__ ((unused)), unsigned long long argp __attribute__ ((unused)))
+{
+	deprintf("[SPU] fb_writer_spu is up... (on SPE #%llu)\n", spe_id);
+	uint32_t ea_mfc, mbox;
+	// send ready message
+	spu_write_out_mbox(SPU_READY);
+
+	while (1) {
+		/* Check mailbox */
+		mbox = spu_read_in_mbox();
+		deprintf("[SPU] Message is %u\n", mbox);
+		switch (mbox) {
+			case SPU_EXIT:
+				deprintf("[SPU] fb_writer goes down...\n");
+				return 0;
+			case SPU_START:
+				break;
+			default:
+				deprintf("[SPU] Cannot handle message\n");
+				continue;
+		}
+
+		/* Tag Manager setup */
+		unsigned int tags;
+		tags = mfc_multi_tag_reserve(5);
+		if (tags == MFC_TAG_INVALID) {
+			deprintf("[SPU] Failed to reserve mfc tags on fb_writer\n");
+			return 0;
+		}
+
+		/* Framebuffer parms */
+		ea_mfc = spu_read_in_mbox();
+		deprintf("[SPU] Message on fb_writer is %u\n", ea_mfc);
+		spu_mfcdma32(&parms, (unsigned int)ea_mfc,
+				sizeof(struct fb_writer_parms_t), tags,
+				MFC_GET_CMD);
+		deprintf("[SPU] argp = %u\n", (unsigned int)argp);
+		DMA_WAIT_TAG(tags);
+
+		/* Copy parms->data to framebuffer */
+		deprintf("[SPU] Copying to framebuffer started\n");
+		cpy_to_fb(tags);
+		deprintf("[SPU] Copying to framebuffer done!\n");
+
+		mfc_multi_tag_release(tags, 5);
+		deprintf("[SPU] fb_writer_spu... done!\n");
+		/* Send FIN msg */
+		spu_write_out_mbox(SPU_FIN);
+	}
+
+	return 0;
+}
+
+void cpy_to_fb(unsigned int tag_id_base)
+{
+	unsigned int i;
+	unsigned char current_buf;
+	uint8_t *in = parms.data;
+
+	/* Align fb pointer which was centered before */
+	uint8_t *fb =
+	    (unsigned char *)((unsigned int)parms.center & 0xFFFFFFF0);
+
+	uint32_t bounded_input_height = parms.bounded_input_height;
+	uint32_t bounded_input_width = parms.bounded_input_width;
+	uint32_t fb_pixel_size = parms.fb_pixel_size;
+
+	uint32_t out_line_stride = parms.out_line_stride;
+	uint32_t in_line_stride = parms.in_line_stride;
+	uint32_t in_line_size = bounded_input_width * fb_pixel_size;
+
+	current_buf = 0;
+
+	/* Local store buffer */
+	static volatile uint8_t buf[4][BUFFER_SIZE]
+	    __attribute__ ((aligned(128)));
+	/* do 4-times multibuffering using DMA list, process in two steps */
+	for (i = 0; i < bounded_input_height >> 2; i++) {
+		/* first buffer */
+		DMA_WAIT_TAG(tag_id_base + 1);
+		// retrieve buffer
+		spu_mfcdma32(buf[0], (unsigned int)in, in_line_size,
+			     tag_id_base + 1, MFC_GETB_CMD);
+		DMA_WAIT_TAG(tag_id_base + 1);
+		// store buffer
+		spu_mfcdma32(buf[0], (unsigned int)fb, in_line_size,
+			     tag_id_base + 1, MFC_PUTB_CMD);
+		in += in_line_stride;
+		fb += out_line_stride;
+		deprintf("[SPU] 1st buffer copied in=0x%x, fb=0x%x\n", in,
+		       fb);
+
+		/* second buffer */
+		DMA_WAIT_TAG(tag_id_base + 2);
+		// retrieve buffer
+		spu_mfcdma32(buf[1], (unsigned int)in, in_line_size,
+			     tag_id_base + 2, MFC_GETB_CMD);
+		DMA_WAIT_TAG(tag_id_base + 2);
+		// store buffer
+		spu_mfcdma32(buf[1], (unsigned int)fb, in_line_size,
+			     tag_id_base + 2, MFC_PUTB_CMD);
+		in += in_line_stride;
+		fb += out_line_stride;
+		deprintf("[SPU] 2nd buffer copied in=0x%x, fb=0x%x\n", in,
+		       fb);
+
+		/* third buffer */
+		DMA_WAIT_TAG(tag_id_base + 3);
+		// retrieve buffer
+		spu_mfcdma32(buf[2], (unsigned int)in, in_line_size,
+			     tag_id_base + 3, MFC_GETB_CMD);
+		DMA_WAIT_TAG(tag_id_base + 3);
+		// store buffer
+		spu_mfcdma32(buf[2], (unsigned int)fb, in_line_size,
+			     tag_id_base + 3, MFC_PUTB_CMD);
+		in += in_line_stride;
+		fb += out_line_stride;
+		deprintf("[SPU] 3rd buffer copied in=0x%x, fb=0x%x\n", in,
+		       fb);
+
+		/* fourth buffer */
+		DMA_WAIT_TAG(tag_id_base + 4);
+		// retrieve buffer
+		spu_mfcdma32(buf[3], (unsigned int)in, in_line_size,
+			     tag_id_base + 4, MFC_GETB_CMD);
+		DMA_WAIT_TAG(tag_id_base + 4);
+		// store buffer
+		spu_mfcdma32(buf[3], (unsigned int)fb, in_line_size,
+			     tag_id_base + 4, MFC_PUTB_CMD);
+		in += in_line_stride;
+		fb += out_line_stride;
+		deprintf("[SPU] 4th buffer copied in=0x%x, fb=0x%x\n", in,
+		       fb);
+		deprintf("[SPU] Loop #%i, bounded_input_height=%i\n", i,
+		       bounded_input_height >> 2);
+	}
+	DMA_WAIT_TAG(tag_id_base + 2);
+	DMA_WAIT_TAG(tag_id_base + 3);
+	DMA_WAIT_TAG(tag_id_base + 4);
+}
+
+