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/* |
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* Copyright (C) 2004-2005 Anders Gavare. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* |
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* $Id: dev_m700_fb.c,v 1.13 2005/10/26 14:37:04 debug Exp $ |
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* |
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* Olivetti M700 framebuffer. |
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* |
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* TODO: This is enough to show the penguin and some text, with Linux, |
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* but that's about it. |
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*/ |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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|
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#include "devices.h" |
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#include "memory.h" |
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#include "misc.h" |
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|
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|
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#define DEFAULT_XSIZE 800 |
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#define DEFAULT_YSIZE 600 |
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|
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|
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struct m700_fb_data { |
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struct vfb_data *fb; |
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int xsize; |
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int ysize; |
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}; |
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|
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|
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/* |
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* schedule_redraw_of_whole_screen(): |
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*/ |
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static void schedule_redraw_of_whole_screen(struct m700_fb_data *d) |
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{ |
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d->fb->update_x1 = 0; |
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d->fb->update_x2 = d->fb->xsize - 1; |
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d->fb->update_y1 = 0; |
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d->fb->update_y2 = d->fb->ysize - 1; |
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} |
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|
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|
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/* |
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* dev_m700_fb_access(): |
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*/ |
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int dev_m700_fb_access(struct cpu *cpu, struct memory *mem, |
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uint64_t relative_addr, unsigned char *data, size_t len, |
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int writeflag, void *extra) |
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{ |
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struct m700_fb_data *d = (struct m700_fb_data *) extra; |
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uint64_t idata = 0, odata = 0; |
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|
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if (writeflag == MEM_WRITE) |
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idata = memory_readmax64(cpu, data, len); |
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|
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/* Palette: */ |
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if (relative_addr >= 0x800 && relative_addr <= 0xff8) { |
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int index = (relative_addr - 0x800) / 8; |
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|
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if (writeflag == MEM_WRITE) { |
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d->fb->rgb_palette[index*3 + 0] = (idata >> 16) & 255; |
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d->fb->rgb_palette[index*3 + 1] = (idata >> 8) & 255; |
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d->fb->rgb_palette[index*3 + 2] = idata & 255; |
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schedule_redraw_of_whole_screen(d); |
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} else { |
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odata = (d->fb->rgb_palette[index*3 + 0] << 16) + |
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(d->fb->rgb_palette[index*3 + 1] << 8) + |
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d->fb->rgb_palette[index*3 + 2]; |
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} |
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goto nice_return; |
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} |
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|
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switch (relative_addr) { |
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case 0x0118: |
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odata = d->xsize / 4; |
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break; |
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case 0x0150: |
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/* TODO: This has to do with ysize, but I haven't |
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figured out exactly how yet. */ |
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odata = d->ysize + 512; |
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break; |
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default: |
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if (writeflag == MEM_WRITE) { |
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debug("[ m700_fb: unimplemented write to address " |
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"0x%x, data=0x%02x ]\n", |
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(int)relative_addr, (int)idata); |
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} else { |
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debug("[ m700_fb: unimplemented read from address " |
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"0x%x ]\n", (int)relative_addr); |
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} |
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} |
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|
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nice_return: |
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if (writeflag == MEM_READ) |
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memory_writemax64(cpu, data, len, odata); |
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|
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return 1; |
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} |
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|
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|
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/* |
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* dev_m700_fb_init(): |
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*/ |
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void dev_m700_fb_init(struct machine *machine, struct memory *mem, |
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uint64_t baseaddr, uint64_t baseaddr2) |
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{ |
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struct m700_fb_data *d = malloc(sizeof(struct m700_fb_data)); |
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if (d == NULL) { |
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fprintf(stderr, "out of memory\n"); |
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exit(1); |
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} |
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memset(d, 0, sizeof(struct m700_fb_data)); |
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d->xsize = DEFAULT_XSIZE; |
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d->ysize = DEFAULT_YSIZE; |
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|
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d->fb = dev_fb_init(machine, mem, baseaddr2, VFB_GENERIC, |
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d->xsize, d->ysize, d->xsize, d->ysize, 8, "M700 G364"); |
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if (d->fb == NULL) { |
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fprintf(stderr, "dev_m700_fb_init(): out of memory\n"); |
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exit(1); |
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} |
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|
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memory_device_register(mem, "m700_fb", baseaddr, DEV_M700_FB_LENGTH, |
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dev_m700_fb_access, (void *)d, MEM_DEFAULT, NULL); |
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} |
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