src/mainboard/emulation/qemu-armv7/mainboard.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <console/console.h>
   4 #include <device/device.h>
   5 #include <halt.h>
   6 #include <device/mmio.h>
   7 #include <ramdetect.h>
   8 #include <symbols.h>
   9 #include <framebuffer_info.h>
  10
  11 static void init_gfx(void)
  12 {
  13         uint32_t *pl111;
  14         /* width is at most 4096 */
  15         /* height is at most 1024 */
  16         int width = 800, height = 600;
  17         uint32_t framebuffer = 0x4c000000;
  18         pl111 = (uint32_t *)0x10020000;
  19         write32(pl111, (width / 4) - 4);
  20         write32(pl111 + 1, height - 1);
  21         /* registers 2, 3 and 5 are ignored by qemu. Set them correctly if
  22            we ever go for real hw.  */
  23         /* framebuffer address offset. Has to be in vram.  */
  24         write32(pl111 + 4, framebuffer);
  25         write32(pl111 + 7, 0);
  26         write32(pl111 + 10, 0xff);
  27         write32(pl111 + 6, (5 << 1) | 0x801);
  28
  29         fb_add_framebuffer_info(framebuffer, width, height, 4 * width, 32);
  30 }
  31
  32 static void mainboard_enable(struct device *dev)
  33 {
  34         int discovered;
  35         if (!dev) {
  36                 printk(BIOS_EMERG, "No dev0; die\n");
  37                 halt();
  38         }
  39
  40         discovered = probe_ramsize((uintptr_t)_dram, CONFIG_DRAM_SIZE_MB);
  41         printk(BIOS_DEBUG, "%d MiB of RAM discovered\n", discovered);
  42         ram_range(dev, 0, 0x60000000, discovered * MiB);
  43         init_gfx();
  44 }
  45
  46 struct chip_operations mainboard_ops = {
  47         .enable_dev = mainboard_enable,
  48 };