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

vga-isa-mm.c (3845B)

      1/*
      2 * QEMU ISA MM VGA Emulator.
      3 *
      4 * Copyright (c) 2003 Fabrice Bellard
      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
     25#include "qemu/osdep.h"
     26#include "qemu/bitops.h"
     27#include "qemu/units.h"
     28#include "migration/vmstate.h"
     29#include "hw/display/vga.h"
     30#include "vga_int.h"
     31#include "ui/pixel_ops.h"
     32
     33#define VGA_RAM_SIZE (8 * MiB)
     34
     35typedef struct ISAVGAMMState {
     36    VGACommonState vga;
     37    int it_shift;
     38} ISAVGAMMState;
     39
     40/* Memory mapped interface */
     41static uint64_t vga_mm_read(void *opaque, hwaddr addr, unsigned size)
     42{
     43    ISAVGAMMState *s = opaque;
     44
     45    return vga_ioport_read(&s->vga, addr >> s->it_shift) &
     46        MAKE_64BIT_MASK(0, size * 8);
     47}
     48
     49static void vga_mm_write(void *opaque, hwaddr addr, uint64_t value,
     50                         unsigned size)
     51{
     52    ISAVGAMMState *s = opaque;
     53
     54    vga_ioport_write(&s->vga, addr >> s->it_shift,
     55                     value & MAKE_64BIT_MASK(0, size * 8));
     56}
     57
     58static const MemoryRegionOps vga_mm_ctrl_ops = {
     59    .read = vga_mm_read,
     60    .write = vga_mm_write,
     61    .valid.min_access_size = 1,
     62    .valid.max_access_size = 4,
     63    .impl.min_access_size = 1,
     64    .impl.max_access_size = 4,
     65    .endianness = DEVICE_NATIVE_ENDIAN,
     66};
     67
     68static void vga_mm_init(ISAVGAMMState *s, hwaddr vram_base,
     69                        hwaddr ctrl_base, int it_shift,
     70                        MemoryRegion *address_space)
     71{
     72    MemoryRegion *s_ioport_ctrl, *vga_io_memory;
     73
     74    s->it_shift = it_shift;
     75    s_ioport_ctrl = g_malloc(sizeof(*s_ioport_ctrl));
     76    memory_region_init_io(s_ioport_ctrl, NULL, &vga_mm_ctrl_ops, s,
     77                          "vga-mm-ctrl", 0x100000);
     78    memory_region_set_flush_coalesced(s_ioport_ctrl);
     79
     80    vga_io_memory = g_malloc(sizeof(*vga_io_memory));
     81    /* XXX: endianness? */
     82    memory_region_init_io(vga_io_memory, NULL, &vga_mem_ops, &s->vga,
     83                          "vga-mem", 0x20000);
     84
     85    vmstate_register(NULL, 0, &vmstate_vga_common, s);
     86
     87    memory_region_add_subregion(address_space, ctrl_base, s_ioport_ctrl);
     88    s->vga.bank_offset = 0;
     89    memory_region_add_subregion(address_space,
     90                                vram_base + 0x000a0000, vga_io_memory);
     91    memory_region_set_coalescing(vga_io_memory);
     92}
     93
     94int isa_vga_mm_init(hwaddr vram_base,
     95                    hwaddr ctrl_base, int it_shift,
     96                    MemoryRegion *address_space)
     97{
     98    ISAVGAMMState *s;
     99
    100    s = g_malloc0(sizeof(*s));
    101
    102    s->vga.vram_size_mb = VGA_RAM_SIZE / MiB;
    103    s->vga.global_vmstate = true;
    104    vga_common_init(&s->vga, NULL);
    105    vga_mm_init(s, vram_base, ctrl_base, it_shift, address_space);
    106
    107    s->vga.con = graphic_console_init(NULL, 0, s->vga.hw_ops, s);
    108
    109    memory_region_add_subregion(address_space,
    110                                VBE_DISPI_LFB_PHYSICAL_ADDRESS,
    111                                &s->vga.vram);
    112
    113    return 0;
    114}