cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

next-fb.c (4238B)

      1/*
      2 * NeXT Cube/Station Framebuffer Emulation
      3 *
      4 * Copyright (c) 2011 Bryce Lanham
      5 *
      6 * Permission is hereby granted, free of charge, to any person obtaining a copy
      7 * of this software and associated documentation files (the "Software"), to deal
      8 * in the Software without restriction, including without limitation the rights
      9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     10 * copies of the Software, and to permit persons to whom the Software is
     11 * furnished to do so, subject to the following conditions:
     12 *
     13 * The above copyright notice and this permission notice shall be included in
     14 * all copies or substantial portions of the Software.
     15 *
     16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
     19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     22 * THE SOFTWARE.
     23 */
     24#include "qemu/osdep.h"
     25#include "qapi/error.h"
     26#include "ui/console.h"
     27#include "hw/loader.h"
     28#include "framebuffer.h"
     29#include "ui/pixel_ops.h"
     30#include "hw/m68k/next-cube.h"
     31#include "qom/object.h"
     32
     33OBJECT_DECLARE_SIMPLE_TYPE(NeXTFbState, NEXTFB)
     34
     35struct NeXTFbState {
     36    SysBusDevice parent_obj;
     37
     38    MemoryRegion fb_mr;
     39    MemoryRegionSection fbsection;
     40    QemuConsole *con;
     41
     42    uint32_t cols;
     43    uint32_t rows;
     44    int invalidate;
     45};
     46
     47static void nextfb_draw_line(void *opaque, uint8_t *d, const uint8_t *s,
     48                             int width, int pitch)
     49{
     50    NeXTFbState *nfbstate = NEXTFB(opaque);
     51    static const uint32_t pal[4] = {
     52        0xFFFFFFFF, 0xFFAAAAAA, 0xFF555555, 0xFF000000
     53    };
     54    uint32_t *buf = (uint32_t *)d;
     55    int i = 0;
     56
     57    for (i = 0; i < nfbstate->cols / 4; i++) {
     58        int j = i * 4;
     59        uint8_t src = s[i];
     60        buf[j + 3] = pal[src & 0x3];
     61        src >>= 2;
     62        buf[j + 2] = pal[src & 0x3];
     63        src >>= 2;
     64        buf[j + 1] = pal[src & 0x3];
     65        src >>= 2;
     66        buf[j + 0] = pal[src & 0x3];
     67    }
     68}
     69
     70static void nextfb_update(void *opaque)
     71{
     72    NeXTFbState *s = NEXTFB(opaque);
     73    int dest_width = 4;
     74    int src_width;
     75    int first = 0;
     76    int last  = 0;
     77    DisplaySurface *surface = qemu_console_surface(s->con);
     78
     79    src_width = s->cols / 4 + 8;
     80    dest_width = s->cols * 4;
     81
     82    if (s->invalidate) {
     83        framebuffer_update_memory_section(&s->fbsection, &s->fb_mr, 0,
     84                                          s->cols, src_width);
     85        s->invalidate = 0;
     86    }
     87
     88    framebuffer_update_display(surface, &s->fbsection, s->cols, s->rows,
     89                               src_width, dest_width, 0, 1, nextfb_draw_line,
     90                               s, &first, &last);
     91
     92    dpy_gfx_update(s->con, 0, 0, s->cols, s->rows);
     93}
     94
     95static void nextfb_invalidate(void *opaque)
     96{
     97    NeXTFbState *s = NEXTFB(opaque);
     98    s->invalidate = 1;
     99}
    100
    101static const GraphicHwOps nextfb_ops = {
    102    .invalidate  = nextfb_invalidate,
    103    .gfx_update  = nextfb_update,
    104};
    105
    106static void nextfb_realize(DeviceState *dev, Error **errp)
    107{
    108    NeXTFbState *s = NEXTFB(dev);
    109
    110    memory_region_init_ram(&s->fb_mr, OBJECT(dev), "next-video", 0x1CB100,
    111                           &error_fatal);
    112    sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->fb_mr);
    113
    114    s->invalidate = 1;
    115    s->cols = 1120;
    116    s->rows = 832;
    117
    118    s->con = graphic_console_init(dev, 0, &nextfb_ops, s);
    119    qemu_console_resize(s->con, s->cols, s->rows);
    120}
    121
    122static void nextfb_class_init(ObjectClass *oc, void *data)
    123{
    124    DeviceClass *dc = DEVICE_CLASS(oc);
    125
    126    set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
    127    dc->realize = nextfb_realize;
    128
    129    /* Note: This device does not any state that we have to reset or migrate */
    130}
    131
    132static const TypeInfo nextfb_info = {
    133    .name          = TYPE_NEXTFB,
    134    .parent        = TYPE_SYS_BUS_DEVICE,
    135    .instance_size = sizeof(NeXTFbState),
    136    .class_init    = nextfb_class_init,
    137};
    138
    139static void nextfb_register_types(void)
    140{
    141    type_register_static(&nextfb_info);
    142}
    143
    144type_init(nextfb_register_types)