733e466628
mode sets both banks to the same value. Reading VBE bank register always returns the write aperture setting. This feature is designed for the scrolling function of the VBE 'write character' support. VBE code should use compatibility mode for now. TODO: update VGABIOS to use this feature.
174 lines
6.1 KiB
C++
174 lines
6.1 KiB
C++
/////////////////////////////////////////////////////////////////////////
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// $Id$
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2002-2021 The Bochs Project
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// PCI VGA dummy adapter Copyright (C) 2002,2003 Mike Nordell
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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//
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/////////////////////////////////////////////////////////////////////////
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#ifndef BX_IODEV_VGA_H
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#define BX_IODEV_VGA_H
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// Bochs VBE definitions
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#define VBE_DISPI_TOTAL_VIDEO_MEMORY_MB 16
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#define VBE_DISPI_4BPP_PLANE_SHIFT 22
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#define VBE_DISPI_BANK_ADDRESS 0xA0000
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#define VBE_DISPI_MAX_XRES 2560
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#define VBE_DISPI_MAX_YRES 1600
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#define VBE_DISPI_MAX_BPP 32
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#define VBE_DISPI_IOPORT_INDEX 0x01CE
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#define VBE_DISPI_IOPORT_DATA 0x01CF
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#define VBE_DISPI_INDEX_ID 0x0
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#define VBE_DISPI_INDEX_XRES 0x1
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#define VBE_DISPI_INDEX_YRES 0x2
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#define VBE_DISPI_INDEX_BPP 0x3
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#define VBE_DISPI_INDEX_ENABLE 0x4
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#define VBE_DISPI_INDEX_BANK 0x5
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#define VBE_DISPI_INDEX_VIRT_WIDTH 0x6
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#define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7
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#define VBE_DISPI_INDEX_X_OFFSET 0x8
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#define VBE_DISPI_INDEX_Y_OFFSET 0x9
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#define VBE_DISPI_INDEX_VIDEO_MEMORY_64K 0xa
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#define VBE_DISPI_INDEX_DDC 0xb
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#define VBE_DISPI_ID0 0xB0C0
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#define VBE_DISPI_ID1 0xB0C1
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#define VBE_DISPI_ID2 0xB0C2
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#define VBE_DISPI_ID3 0xB0C3
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#define VBE_DISPI_ID4 0xB0C4
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#define VBE_DISPI_ID5 0xB0C5
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#define VBE_DISPI_BPP_4 0x04
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#define VBE_DISPI_BPP_8 0x08
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#define VBE_DISPI_BPP_15 0x0F
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#define VBE_DISPI_BPP_16 0x10
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#define VBE_DISPI_BPP_24 0x18
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#define VBE_DISPI_BPP_32 0x20
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#define VBE_DISPI_DISABLED 0x00
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#define VBE_DISPI_ENABLED 0x01
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#define VBE_DISPI_GETCAPS 0x02
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#define VBE_DISPI_BANK_GRANULARITY_32K 0x10
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#define VBE_DISPI_8BIT_DAC 0x20
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#define VBE_DISPI_LFB_ENABLED 0x40
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#define VBE_DISPI_NOCLEARMEM 0x80
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#define VBE_DISPI_BANK_WR 0x4000
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#define VBE_DISPI_BANK_RD 0x8000
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#define VBE_DISPI_BANK_RW 0xc000
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#define VBE_DISPI_LFB_PHYSICAL_ADDRESS 0xE0000000
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#define VBE_DISPI_TOTAL_VIDEO_MEMORY_KB (VBE_DISPI_TOTAL_VIDEO_MEMORY_MB * 1024)
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#define VBE_DISPI_TOTAL_VIDEO_MEMORY_BYTES (VBE_DISPI_TOTAL_VIDEO_MEMORY_KB * 1024)
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// End Bochs VBE definitions
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#if BX_USE_VGA_SMF
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# define BX_VGA_SMF static
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# define BX_VGA_THIS theVga->
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# define BX_VGA_THIS_PTR theVga
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#else
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# define BX_VGA_SMF
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# define BX_VGA_THIS this->
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# define BX_VGA_THIS_PTR this
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#endif
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class bx_vga_c : public bx_vgacore_c {
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public:
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bx_vga_c();
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virtual ~bx_vga_c();
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virtual void reset(unsigned type);
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BX_VGA_SMF bool mem_read_handler(bx_phy_address addr, unsigned len, void *data, void *param);
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BX_VGA_SMF bool mem_write_handler(bx_phy_address addr, unsigned len, void *data, void *param);
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virtual Bit8u mem_read(bx_phy_address addr);
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virtual void mem_write(bx_phy_address addr, Bit8u value);
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virtual void register_state(void);
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virtual void after_restore_state(void);
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virtual void redraw_area(unsigned x0, unsigned y0,
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unsigned width, unsigned height);
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virtual bool init_vga_extension(void);
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#if BX_SUPPORT_PCI
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virtual void pci_write_handler(Bit8u address, Bit32u value, unsigned io_len);
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virtual void pci_bar_change_notify(void);
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#endif
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#if BX_DEBUGGER
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virtual void debug_dump(int argc, char **argv);
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#endif
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protected:
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static void write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len);
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#if BX_USE_VGA_SMF
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static void write_handler_no_log(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len);
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#endif
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void write(Bit32u address, Bit32u value, unsigned io_len, bool no_log);
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virtual void update(void);
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// Bochs VBE section
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BX_VGA_SMF Bit8u vbe_mem_read(bx_phy_address addr) BX_CPP_AttrRegparmN(1);
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BX_VGA_SMF void vbe_mem_write(bx_phy_address addr, Bit8u value) BX_CPP_AttrRegparmN(2);
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static Bit32u vbe_read_handler(void *this_ptr, Bit32u address, unsigned io_len);
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static void vbe_write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len);
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#if BX_USE_VGA_SMF == 0
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Bit32u vbe_read(Bit32u address, unsigned io_len);
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void vbe_write(Bit32u address, Bit32u value, unsigned io_len, bool no_log);
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#endif
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private:
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bool vbe_present;
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struct {
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Bit16u cur_dispi;
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Bit32u base_address;
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Bit16u xres;
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Bit16u yres;
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Bit16u bpp;
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Bit16u max_xres;
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Bit16u max_yres;
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Bit16u max_bpp;
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Bit16u bank[2];
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Bit16u bank_granularity_kb;
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bool enabled;
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Bit16u curindex;
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Bit32u visible_screen_size; /**< in bytes */
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Bit16u offset_x; /**< Virtual screen x start (in pixels) */
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Bit16u offset_y; /**< Virtual screen y start (in pixels) */
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Bit16u virtual_xres;
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Bit16u virtual_yres;
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Bit32u virtual_start; /**< For dealing with bpp>8, this is where the virtual screen starts. */
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Bit8u bpp_multiplier; /**< We have to save this b/c sometimes we need to recalculate stuff with it. */
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bool get_capabilities;
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bool dac_8bit;
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bool ddc_enabled;
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} vbe; // VBE state information
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bx_ddc_c ddc;
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};
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#endif
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