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/* |
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* Copyright (C) 2003-2005 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_sgi_gbe.c,v 1.21 2005/02/11 09:29:48 debug Exp $ |
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* |
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* SGI "gbe", graphics controller. Framebuffer. |
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* Loosely inspired by Linux code. |
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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 "console.h" |
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#include "cpu.h" |
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#include "devices.h" |
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#include "machine.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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/* Let's hope nothing is there already... */ |
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#define FAKE_GBE_FB_ADDRESS 0x38000000 |
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|
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#define GBE_DEBUG |
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|
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#define GBE_DEFAULT_XRES 640 |
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#define GBE_DEFAULT_YRES 480 |
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|
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|
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struct sgi_gbe_data { |
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int xres, yres; |
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|
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uint32_t control; /* 0x00000 */ |
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uint32_t dotclock; /* 0x00004 */ |
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uint32_t i2c; /* 0x00008 */ |
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uint32_t i2cfp; /* 0x00010 */ |
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uint32_t plane0ctrl; /* 0x30000 */ |
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uint32_t frm_control; /* 0x3000c */ |
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int freeze; |
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|
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int bitdepth; |
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struct vfb_data *fb_data; |
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}; |
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|
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|
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/* |
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* dev_sgi_gbe_tick(): |
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* |
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* Every now and then, copy data from the framebuffer in normal ram |
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* to the actual framebuffer (which will then redraw the window). |
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* TODO: This is utterly slow, even slower than the normal framebuffer |
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* which is really slow as it is. |
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* |
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* frm_control (bits 31..9) is a pointer to an array of uint16_t. |
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* These numbers (when << 16 bits) are pointers to the tiles. Tiles are |
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* 512x128 in 8-bit mode, 256x128 in 16-bit mode, and 128x128 in 32-bit mode. |
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*/ |
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void dev_sgi_gbe_tick(struct cpu *cpu, void *extra) |
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{ |
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struct sgi_gbe_data *d = extra; |
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int tile_nr = 0, on_screen = 1, xbase = 0, ybase = 0; |
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unsigned char tileptr_buf[sizeof(uint16_t)]; |
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uint64_t tileptr, tiletable; |
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int lines_to_copy, pixels_per_line, y; |
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unsigned char buf[16384]; /* must be power of 2, at most 65536 */ |
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int copy_len, copy_offset; |
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uint64_t old_fb_offset = 0; |
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int tweaked = 1; |
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|
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/* debug("[ sgi_gbe: dev_sgi_gbe_tick() ]\n"); */ |
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|
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tiletable = (d->frm_control & 0xfffffe00); |
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if (tiletable == 0) |
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on_screen = 0; |
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|
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while (on_screen) { |
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/* Get pointer to a tile: */ |
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cpu->memory_rw(cpu, cpu->mem, tiletable + |
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sizeof(tileptr_buf) * tile_nr, |
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tileptr_buf, sizeof(tileptr_buf), MEM_READ, |
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NO_EXCEPTIONS | PHYSICAL); |
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tileptr = 256 * tileptr_buf[0] + tileptr_buf[1]; |
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/* TODO: endianness */ |
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tileptr <<= 16; |
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|
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/* tileptr is now a physical address of a tile. */ |
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debug("[ sgi_gbe: tile_nr = %2i, tileptr = 0x%08lx, xbase" |
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" = %4i, ybase = %4i ]\n", tile_nr, tileptr, xbase, ybase); |
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|
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if (tweaked) { |
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/* Tweaked (linear) mode: */ |
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|
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/* Copy data from this 64KB physical RAM block to the framebuffer: */ |
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/* NOTE: Copy it in smaller chunks than 64KB, in case the framebuffer |
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device can optimize away portions that aren't modified that way */ |
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copy_len = sizeof(buf); |
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copy_offset = 0; |
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|
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while (on_screen && copy_offset < 65536) { |
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if (old_fb_offset + copy_len > d->xres * d->yres * d->bitdepth / 8) { |
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copy_len = d->xres * d->yres * d->bitdepth / 8 - old_fb_offset; |
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/* Stop after copying this block... */ |
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on_screen = 0; |
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} |
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|
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/* debug("old_fb_offset = %08x copylen" |
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"=%i\n", old_fb_offset, copy_len); */ |
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|
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cpu->memory_rw(cpu, cpu->mem, tileptr + |
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copy_offset, buf, copy_len, MEM_READ, |
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NO_EXCEPTIONS | PHYSICAL); |
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dev_fb_access(cpu, cpu->mem, old_fb_offset, |
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buf, copy_len, MEM_WRITE, d->fb_data); |
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copy_offset += sizeof(buf); |
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old_fb_offset += sizeof(buf); |
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} |
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} else { |
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/* This is for non-tweaked (tiled) mode. Not really tested |
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with correct image data, but might work: */ |
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|
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lines_to_copy = 128; |
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if (ybase + lines_to_copy > d->yres) |
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lines_to_copy = d->yres - ybase; |
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|
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pixels_per_line = 512 * 8 / d->bitdepth; |
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if (xbase + pixels_per_line > d->xres) |
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pixels_per_line = d->xres - xbase; |
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|
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for (y=0; y<lines_to_copy; y++) { |
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cpu->memory_rw(cpu, cpu->mem, tileptr + 512 * y, |
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buf, pixels_per_line * d->bitdepth / 8, |
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MEM_READ, NO_EXCEPTIONS | PHYSICAL); |
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|
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dev_fb_access(cpu, cpu->mem, ((ybase + y) * |
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d->xres + xbase) * d->bitdepth / 8, |
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buf, pixels_per_line * d->bitdepth / 8, |
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MEM_WRITE, d->fb_data); |
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} |
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|
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/* Go to next tile: */ |
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xbase += (512 * 8 / d->bitdepth); |
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if (xbase >= d->xres) { |
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xbase = 0; |
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ybase += 128; |
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if (ybase >= d->yres) |
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on_screen = 0; |
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} |
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} |
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|
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/* Go to next tile: */ |
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tile_nr ++; |
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} |
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|
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/* debug("[ sgi_gbe: dev_sgi_gbe_tick() end]\n"); */ |
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} |
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|
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|
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/* |
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* dev_sgi_gbe_access(): |
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*/ |
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int dev_sgi_gbe_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 sgi_gbe_data *d = extra; |
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uint64_t idata = 0, odata = 0; |
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|
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idata = memory_readmax64(cpu, data, len); |
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|
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#ifdef GBE_DEBUG |
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if (writeflag == MEM_WRITE) |
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debug("[ sgi_gbe: DEBUG: write to address 0x%llx, data=0x%llx ]\n", (long long)relative_addr, (long long)idata); |
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#endif |
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|
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switch (relative_addr) { |
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|
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case 0x0: |
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if (writeflag == MEM_WRITE) |
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d->control = idata; |
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else |
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odata = d->control; |
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break; |
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|
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case 0x4: |
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if (writeflag == MEM_WRITE) |
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d->dotclock = idata; |
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else |
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odata = d->dotclock; |
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break; |
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|
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case 0x8: /* i2c? */ |
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/* |
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* "CRT I2C control". |
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* |
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* I'm not sure what this does. It isn't really commented |
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* in the linux sources. The IP32 prom writes the values |
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* 0x03, 0x01, and then 0x00 to this address, and then |
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* reads back a value. |
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*/ |
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if (writeflag == MEM_WRITE) { |
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d->i2c = idata; |
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} else { |
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odata = d->i2c; |
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odata |= 1; /* ? The IP32 prom wants this? */ |
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} |
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break; |
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|
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case 0x10: /* i2cfp, flat panel control */ |
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if (writeflag == MEM_WRITE) { |
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d->i2cfp = idata; |
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} else { |
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odata = d->i2cfp; |
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odata |= 1; /* ? The IP32 prom wants this? */ |
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} |
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break; |
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|
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case 0x10000: /* vt_xy, according to Linux */ |
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if (writeflag == MEM_WRITE) |
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d->freeze = idata & ((uint32_t)1<<31)? 1 : 0; |
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else { |
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/* bit 31 = freeze, 23..12 = cury, 11.0 = curx */ |
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odata = ((random() % (d->yres + 10)) << 12) |
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+ (random() % (d->xres + 10)) + (d->freeze? ((uint32_t)1 << 31) : 0); |
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odata = random(); /* testhack for the ip32 prom */ |
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} |
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break; |
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|
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case 0x10004: /* vt_xymax, according to Linux */ |
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odata = ((d->yres-1) << 12) + d->xres-1; /* ... 12 bits maxy, 12 bits maxx. */ |
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break; |
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|
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case 0x10034: /* vt_hpixen, according to Linux */ |
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odata = (0 << 12) + d->xres-1; /* ... 12 bits on, 12 bits off. */ |
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break; |
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|
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case 0x10038: /* vt_vpixen, according to Linux */ |
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odata = (0 << 12) + d->yres-1; /* ... 12 bits on, 12 bits off. */ |
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break; |
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|
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case 0x20004: |
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odata = random(); /* IP32 prom test hack. TODO */ |
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/* IRIX wants 0x20, it seems. */ |
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if (random() & 1) |
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odata = 0x20; |
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break; |
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|
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case 0x30000: /* normal plane ctrl 0 */ |
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/* bit 15 = fifo reset, 14..13 = depth, 12..5 = tile width, 4..0 = rhs */ |
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if (writeflag == MEM_WRITE) { |
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d->plane0ctrl = idata; |
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d->bitdepth = 8 << ((d->plane0ctrl >> 13) & 3); |
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debug("[ sgi_gbe: setting color depth to %i bits ]\n", d->bitdepth); |
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if (d->bitdepth != 8) |
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fatal("sgi_gbe: warning: bitdepth %i not really implemented yet\n", d->bitdepth); |
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} else |
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odata = d->plane0ctrl; |
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break; |
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|
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case 0x30008: /* normal plane ctrl 2 */ |
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odata = random(); /* IP32 prom test hack. TODO */ |
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/* IRIX wants 0x20, it seems. */ |
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if (random() & 1) |
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odata = 0x20; |
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break; |
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|
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case 0x3000c: /* normal plane ctrl 3 */ |
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/* Writes to 3000c should be readable back at 30008? At least bit 0 (dma) */ |
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/* ctrl 3: Bits 31..9 = tile table pointer bits, Bit 1 = linear, Bit 0 = dma */ |
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if (writeflag == MEM_WRITE) { |
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d->frm_control = idata; |
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debug("[ sgi_gbe: frm_control = 0x%08x ]\n", d->frm_control); |
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} else |
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odata = d->frm_control; |
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break; |
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|
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case 0x40000: |
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odata = random(); /* IP32 prom test hack. TODO */ |
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/* IRIX wants 0x20, it seems. */ |
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if (random() & 1) |
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odata = 0x20; |
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break; |
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|
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/* |
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* Linux/sgimips seems to write color palette data to offset 0x50000 - 0x503xx, |
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* and gamma correction data to 0x60000 - 0x603ff, as 32-bit values at addresses |
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* divisible by 4 (formated as 0xrrggbb00). |
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* |
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* sgio2fb: initializing |
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* sgio2fb: I/O at 0xffffffffb6000000 |
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* sgio2fb: tiles at ffffffffa2ef5000 |
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* sgio2fb: framebuffer at ffffffffa1000000 |
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* sgio2fb: 8192kB memory |
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* Console: switching to colour frame buffer device 80x30 |
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*/ |
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|
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default: |
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/* Gamma correction: */ |
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if (relative_addr >= 0x60000 && relative_addr <= 0x603ff) { |
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/* ignore gamma correction for now */ |
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break; |
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} |
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|
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/* RGB Palette: */ |
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if (relative_addr >= 0x50000 && relative_addr <= 0x503ff) { |
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int color_nr, r, g, b; |
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int old_r, old_g, old_b; |
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|
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color_nr = (relative_addr & 0x3ff) / 4; |
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r = (idata >> 24) & 0xff; |
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g = (idata >> 16) & 0xff; |
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b = (idata >> 8) & 0xff; |
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|
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old_r = d->fb_data->rgb_palette[color_nr * 3 + 0]; |
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old_g = d->fb_data->rgb_palette[color_nr * 3 + 1]; |
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old_b = d->fb_data->rgb_palette[color_nr * 3 + 2]; |
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|
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d->fb_data->rgb_palette[color_nr * 3 + 0] = r; |
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d->fb_data->rgb_palette[color_nr * 3 + 1] = g; |
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d->fb_data->rgb_palette[color_nr * 3 + 2] = b; |
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|
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if (r != old_r || g != old_g || b != old_b) { |
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/* If the palette has been changed, the entire image needs to be redrawn... :-/ */ |
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d->fb_data->update_x1 = 0; |
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d->fb_data->update_x2 = d->fb_data->xsize - 1; |
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d->fb_data->update_y1 = 0; |
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d->fb_data->update_y2 = d->fb_data->ysize - 1; |
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} |
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break; |
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} |
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|
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if (writeflag == MEM_WRITE) |
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debug("[ sgi_gbe: unimplemented write to address 0x%llx, data=0x%llx ]\n", (long long)relative_addr, (long long)idata); |
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else |
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debug("[ sgi_gbe: unimplemented read from address 0x%llx ]\n", (long long)relative_addr); |
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} |
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|
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if (writeflag == MEM_READ) { |
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#ifdef GBE_DEBUG |
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debug("[ sgi_gbe: DEBUG: read from address 0x%llx: 0x%llx ]\n", (long long)relative_addr, (long long)odata); |
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#endif |
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memory_writemax64(cpu, data, len, odata); |
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} |
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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_sgi_gbe_init(): |
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*/ |
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void dev_sgi_gbe_init(struct machine *machine, struct memory *mem, |
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uint64_t baseaddr) |
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{ |
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struct sgi_gbe_data *d; |
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|
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d = malloc(sizeof(struct sgi_gbe_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 sgi_gbe_data)); |
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d->xres = GBE_DEFAULT_XRES; |
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d->yres = GBE_DEFAULT_YRES; |
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d->bitdepth = 8; |
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d->control = 0x20aa000; /* or 0x00000001? */ |
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d->fb_data = dev_fb_init(machine, mem, FAKE_GBE_FB_ADDRESS, |
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VFB_GENERIC, d->xres, d->yres, d->xres, d->yres, 8, "SGI GBE", 0); |
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set_grayscale_palette(d->fb_data, 256); |
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|
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memory_device_register(mem, "sgi_gbe", baseaddr, DEV_SGI_GBE_LENGTH, |
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dev_sgi_gbe_access, d, MEM_DEFAULT, NULL); |
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machine_add_tickfunction(machine, dev_sgi_gbe_tick, d, 18); |
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} |
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