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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_kn01.c,v 1.6 2005/02/11 09:53:48 debug Exp $ |
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* |
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* KN01 stuff ("PMAX", DECstation type 1); CSR (System Control Register) |
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* and VDAC. |
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* |
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* TODO: The CSR isn't really complete. |
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* |
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* One of the few usable bits in the csr would be KN01_CSR_MONO. |
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* If that bit is set, the framebuffer is treated as a monochrome |
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* one. |
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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 "cpu.h" |
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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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#include "dec_kn01.h" |
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|
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|
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struct kn01_csr_data { |
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int color_fb; |
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int csr; |
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}; |
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|
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|
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struct vdac_data { |
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unsigned char vdac_reg[DEV_VDAC_LENGTH]; |
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|
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int color_fb_flag; |
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|
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unsigned char cur_read_addr; |
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unsigned char cur_write_addr; |
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|
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int sub_color; /* subcolor. 0, 1, or 2 */ |
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unsigned char cur_rgb[3]; |
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|
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unsigned char *rgb_palette; /* ptr to 256 * 3 (r,g,b) */ |
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|
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unsigned char cur_read_addr_overlay; |
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unsigned char cur_write_addr_overlay; |
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|
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int sub_color_overlay; /* subcolor: 0, 1, or 2 */ |
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unsigned char cur_rgb_overlay[3]; |
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|
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unsigned char rgb_palette_overlay[16 * 3]; /* 16 * 3 (r,g,b) */ |
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}; |
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|
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|
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/* |
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* dev_kn01_csr_access(): |
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*/ |
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int dev_kn01_csr_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 kn01_csr_data *k = extra; |
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int csr; |
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|
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if (writeflag == MEM_WRITE) { |
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/* TODO */ |
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return 1; |
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} |
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|
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/* Read: */ |
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if (len != 2 || relative_addr != 0) { |
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fatal("[ kn01_csr: trying to read something which is not " |
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"the first half-word of the csr ]"); |
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} |
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|
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csr = k->csr; |
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|
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if (cpu->byte_order == EMUL_LITTLE_ENDIAN) { |
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data[0] = csr & 0xff; |
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data[1] = (csr >> 8) & 0xff; |
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} else { |
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data[1] = csr & 0xff; |
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data[0] = (csr >> 8) & 0xff; |
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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_vdac_access(): |
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*/ |
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int dev_vdac_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 vdac_data *d = (struct vdac_data *) extra; |
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|
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/* Read from/write to the vdac: */ |
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switch (relative_addr) { |
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case DEV_VDAC_MAPWA: |
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if (writeflag == MEM_WRITE) { |
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d->cur_write_addr = data[0]; |
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d->sub_color = 0; |
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} else { |
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debug("[ vdac: read from MAPWA ]\n"); |
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data[0] = d->vdac_reg[relative_addr]; |
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} |
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break; |
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case DEV_VDAC_MAP: |
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if (writeflag == MEM_WRITE) { |
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d->cur_rgb[d->sub_color] = data[0]; |
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d->sub_color++; |
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|
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if (d->sub_color > 2) { |
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/* (Only update for color, not mono mode) */ |
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if (d->color_fb_flag) |
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memcpy(d->rgb_palette + |
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3*d->cur_write_addr, d->cur_rgb, 3); |
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|
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d->sub_color = 0; |
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d->cur_write_addr ++; |
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} |
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} else { |
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if (d->sub_color == 0) { |
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memcpy(d->cur_rgb, d->rgb_palette + |
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3 * d->cur_read_addr, 3); |
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} |
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data[0] = d->cur_rgb[d->sub_color]; |
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d->sub_color++; |
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if (d->sub_color > 2) { |
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d->sub_color = 0; |
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d->cur_read_addr ++; |
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} |
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} |
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break; |
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case DEV_VDAC_MAPRA: |
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if (writeflag == MEM_WRITE) { |
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d->cur_read_addr = data[0]; |
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d->sub_color = 0; |
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} else { |
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debug("[ vdac: read from MAPRA ]\n"); |
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data[0] = d->vdac_reg[relative_addr]; |
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} |
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break; |
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case DEV_VDAC_OVERWA: |
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if (writeflag == MEM_WRITE) { |
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d->cur_write_addr_overlay = data[0]; |
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d->sub_color_overlay = 0; |
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} else { |
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debug("[ vdac: read from OVERWA ]\n"); |
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data[0] = d->vdac_reg[relative_addr]; |
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} |
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break; |
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case DEV_VDAC_OVER: |
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if (writeflag == MEM_WRITE) { |
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d->cur_rgb_overlay[d->sub_color_overlay] = data[0]; |
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d->sub_color_overlay++; |
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|
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if (d->sub_color_overlay > 2) { |
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/* (Only update for color, not mono mode) */ |
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if (d->color_fb_flag) |
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memcpy(d->rgb_palette_overlay + |
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3 * d->cur_write_addr_overlay, |
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d->cur_rgb_overlay, 3); |
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|
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d->sub_color_overlay = 0; |
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d->cur_write_addr_overlay ++; |
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if (d->cur_write_addr_overlay > 15) |
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d->cur_write_addr_overlay = 0; |
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} |
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} else { |
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if (d->sub_color_overlay == 0) { |
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memcpy(d->cur_rgb_overlay, |
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d->rgb_palette_overlay + |
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3 * d->cur_read_addr_overlay, 3); |
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} |
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data[0] = d->cur_rgb_overlay[d->sub_color_overlay]; |
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d->sub_color_overlay++; |
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if (d->sub_color_overlay > 2) { |
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d->sub_color_overlay = 0; |
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d->cur_read_addr_overlay ++; |
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if (d->cur_read_addr_overlay > 15) |
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d->cur_read_addr_overlay = 0; |
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} |
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} |
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break; |
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case DEV_VDAC_OVERRA: |
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if (writeflag == MEM_WRITE) { |
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d->cur_read_addr_overlay = data[0]; |
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d->sub_color_overlay = 0; |
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} else { |
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debug("[ vdac: read from OVERRA ]\n"); |
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data[0] = d->vdac_reg[relative_addr]; |
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} |
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break; |
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default: |
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if (writeflag == MEM_WRITE) { |
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debug("[ vdac: unimplemented write to address 0x%x," |
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" data=0x%02x ]\n", (int)relative_addr, data[0]); |
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d->vdac_reg[relative_addr] = data[0]; |
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} else { |
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debug("[ vdac: unimplemented read from address 0x%x" |
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" ]\n", (int)relative_addr); |
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data[0] = d->vdac_reg[relative_addr]; |
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} |
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} |
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|
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/* Pretend it was ok: */ |
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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_vdac_init(): |
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*/ |
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void dev_vdac_init(struct memory *mem, uint64_t baseaddr, |
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unsigned char *rgb_palette, int color_fb_flag) |
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{ |
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struct vdac_data *d = malloc(sizeof(struct vdac_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 vdac_data)); |
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d->rgb_palette = rgb_palette; |
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d->color_fb_flag = color_fb_flag; |
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|
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memory_device_register(mem, "vdac", baseaddr, DEV_VDAC_LENGTH, |
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dev_vdac_access, (void *)d, MEM_DEFAULT, NULL); |
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} |
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|
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|
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/* |
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* dev_kn01_csr_init(): |
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*/ |
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void dev_kn01_csr_init(struct memory *mem, uint64_t baseaddr, int color_fb) |
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{ |
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struct kn01_csr_data *k = malloc(sizeof(struct kn01_csr_data)); |
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if (k == 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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|
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memset(k, 0, sizeof(struct kn01_csr_data)); |
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k->color_fb = color_fb; |
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|
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k->csr = 0; |
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k->csr |= (color_fb? 0 : KN01_CSR_MONO); |
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|
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memory_device_register(mem, "kn01_csr", baseaddr, |
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DEV_KN01_CSR_LENGTH, dev_kn01_csr_access, k, MEM_DEFAULT, NULL); |
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} |
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