Add bochs video support
This commit is contained in:
Vladimir 'phcoder' Serbinenko
parent
9a3e298a7e
commit
368e544ba6
3 changed files with 507 additions and 1 deletions
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@ -20,6 +20,11 @@ video_cirrus_mod_SOURCES = video/cirrus.c
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video_cirrus_mod_CFLAGS = $(COMMON_CFLAGS)
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video_cirrus_mod_LDFLAGS = $(COMMON_LDFLAGS)
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pkglib_MODULES += video_bochs.mod
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video_bochs_mod_SOURCES = video/bochs.c
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video_bochs_mod_CFLAGS = $(COMMON_CFLAGS)
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video_bochs_mod_LDFLAGS = $(COMMON_LDFLAGS)
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pkglib_MODULES += relocator.mod
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relocator_mod_SOURCES = lib/i386/relocator.c lib/i386/relocator_asm.S lib/i386/relocator_backward.S
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relocator_mod_CFLAGS = $(COMMON_CFLAGS)
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@ -183,7 +183,8 @@ typedef enum grub_video_driver_id
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GRUB_VIDEO_DRIVER_EFI_GOP,
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GRUB_VIDEO_DRIVER_SM712,
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GRUB_VIDEO_DRIVER_VGA,
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GRUB_VIDEO_DRIVER_CIRRUS
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GRUB_VIDEO_DRIVER_CIRRUS,
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GRUB_VIDEO_DRIVER_BOCHS
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} grub_video_driver_id_t;
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struct grub_video_adapter
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500
video/bochs.c
Normal file
500
video/bochs.c
Normal file
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@ -0,0 +1,500 @@
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2005,2006,2007,2008,2009,2010 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define grub_video_render_target grub_video_fbrender_target
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#include <grub/err.h>
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#include <grub/types.h>
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#include <grub/dl.h>
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#include <grub/misc.h>
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#include <grub/mm.h>
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#include <grub/video.h>
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#include <grub/video_fb.h>
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#include <grub/pci.h>
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static struct
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{
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struct grub_video_mode_info mode_info;
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grub_uint8_t *ptr;
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int mapped;
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grub_uint32_t base;
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grub_pci_device_t dev;
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} framebuffer;
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#define BOCHS_APERTURE_SIZE 0x800000
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#define BOCHS_MAX_WIDTH 1600
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#define BOCHS_MAX_HEIGHT 1200
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#define BOCHS_WIDTH_ALIGN 8
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enum
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{
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CIRRUS_SR_MEMORY_MODE = 4,
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CIRRUS_SR_EXTENDED_MODE = 7,
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CIRRUS_SR_MAX
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};
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#define CIRRUS_SR_MEMORY_MODE_CHAIN4 8
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enum
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{
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BOCHS_VBE_INDEX = 0x1ce,
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BOCHS_VBE_DATA = 0x1cf,
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SR_INDEX = 0x3c4,
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SR_DATA = 0x3c5,
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BOCHS_PALLETTE_READ_INDEX = 0x3c7,
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BOCHS_PALLETTE_WRITE_INDEX = 0x3c8,
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BOCHS_PALLETTE_DATA = 0x3c9,
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GR_INDEX = 0x3ce,
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GR_DATA = 0x3cf,
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CR_INDEX = 0x3d4,
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CR_DATA = 0x3d5,
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};
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enum
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{
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BOCHS_VBE_WIDTH = 1,
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BOCHS_VBE_HEIGHT = 2,
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BOCHS_VBE_BPP = 3,
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BOCHS_VBE_ENABLE = 4,
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BOCHS_VBE_Y_OFFSET = 9,
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BOCHS_VBE_MAX
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};
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static void
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vbe_write (grub_uint16_t val, grub_uint16_t addr)
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{
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grub_outw (addr, BOCHS_VBE_INDEX);
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grub_outw (val, BOCHS_VBE_DATA);
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}
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static grub_uint16_t
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vbe_read (grub_uint16_t addr)
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{
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grub_outw (addr, BOCHS_VBE_INDEX);
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return grub_inw (BOCHS_VBE_DATA);
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}
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static void
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gr_write (grub_uint8_t val, grub_uint8_t addr)
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{
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grub_outb (addr, GR_INDEX);
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grub_outb (val, GR_DATA);
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}
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static grub_uint8_t
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gr_read (grub_uint8_t addr)
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{
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grub_outb (addr, GR_INDEX);
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return grub_inb (GR_DATA);
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}
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static void
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cr_write (grub_uint8_t val, grub_uint8_t addr)
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{
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grub_outb (addr, CR_INDEX);
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grub_outb (val, CR_DATA);
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}
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static grub_uint8_t
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cr_read (grub_uint8_t addr)
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{
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grub_outb (addr, CR_INDEX);
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return grub_inb (CR_DATA);
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}
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static void
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palette_read (grub_uint8_t addr, grub_uint8_t *r, grub_uint8_t *g,
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grub_uint8_t *b)
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{
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grub_outb (addr, BOCHS_PALLETTE_READ_INDEX);
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*r = grub_inb (BOCHS_PALLETTE_DATA);
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*g = grub_inb (BOCHS_PALLETTE_DATA);
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*b = grub_inb (BOCHS_PALLETTE_DATA);
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}
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static void
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palette_write (grub_uint8_t addr, grub_uint8_t r, grub_uint8_t g,
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grub_uint8_t b)
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{
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grub_outb (addr, BOCHS_PALLETTE_READ_INDEX);
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grub_outb (r, BOCHS_PALLETTE_DATA);
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grub_outb (g, BOCHS_PALLETTE_DATA);
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grub_outb (b, BOCHS_PALLETTE_DATA);
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}
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static void
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sr_write (grub_uint8_t val, grub_uint8_t addr)
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{
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grub_outb (addr, SR_INDEX);
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grub_outb (val, SR_DATA);
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}
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static grub_uint8_t
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sr_read (grub_uint8_t addr)
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{
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grub_outb (addr, SR_INDEX);
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return grub_inb (SR_DATA);
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}
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struct saved_state
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{
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grub_uint8_t cr[256];
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grub_uint8_t gr[256];
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grub_uint8_t sr[256];
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grub_uint8_t r[256];
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grub_uint8_t g[256];
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grub_uint8_t b[256];
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grub_uint8_t vbe[BOCHS_VBE_MAX];
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int vbe_enable;
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/* We need to preserve VGA font and VGA text. */
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grub_uint8_t vram[32 * 4 * 256];
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};
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static struct saved_state initial_state;
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static int state_saved = 0;
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static void
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save_state (struct saved_state *st)
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{
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unsigned i;
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for (i = 0; i < ARRAY_SIZE (st->cr); i++)
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st->cr[i] = cr_read (i);
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for (i = 0; i < ARRAY_SIZE (st->gr); i++)
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st->gr[i] = gr_read (i);
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for (i = 0; i < ARRAY_SIZE (st->sr); i++)
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st->sr[i] = sr_read (i);
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grub_printf ("%d\n", st->cr[1]);
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for (i = 0; i < 256; i++)
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palette_read (i, st->r + i, st->g + i, st->b + i);
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st->vbe_enable = vbe_read (BOCHS_VBE_ENABLE) & 1;
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if (st->vbe_enable)
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for (i = 0; i < ARRAY_SIZE (st->vbe); i++)
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st->vbe[i] = vbe_read (i);
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sr_write (CIRRUS_SR_MEMORY_MODE_CHAIN4, CIRRUS_SR_MEMORY_MODE);
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grub_memcpy (st->vram, framebuffer.ptr, sizeof (st->vram));
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sr_write (st->sr[CIRRUS_SR_MEMORY_MODE], CIRRUS_SR_MEMORY_MODE);
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}
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static void
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restore_state (struct saved_state *st)
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{
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unsigned i;
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if (st->vbe_enable)
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for (i = 0; i < ARRAY_SIZE (st->vbe); i++)
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vbe_write (st->vbe[i], i);
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else
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vbe_write (0, BOCHS_VBE_ENABLE);
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cr_write (0, 0x11);
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for (i = 0; i < ARRAY_SIZE (st->cr); i++)
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cr_write (st->cr[i], i);
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for (i = 0; i < ARRAY_SIZE (st->sr); i++)
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sr_write (st->sr[i], i);
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for (i = 0; i < ARRAY_SIZE (st->gr); i++)
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gr_write (st->gr[i], i);
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for (i = 0; i < 256; i++)
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palette_write (i, st->r[i], st->g[i], st->b[i]);
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sr_write (CIRRUS_SR_MEMORY_MODE_CHAIN4, CIRRUS_SR_MEMORY_MODE);
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grub_memcpy (framebuffer.ptr, st->vram, sizeof (st->vram));
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sr_write (st->sr[CIRRUS_SR_MEMORY_MODE], CIRRUS_SR_MEMORY_MODE);
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}
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static grub_err_t
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grub_video_bochs_video_init (void)
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{
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/* Reset frame buffer. */
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grub_memset (&framebuffer, 0, sizeof(framebuffer));
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return grub_video_fb_init ();
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}
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static grub_err_t
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grub_video_bochs_video_fini (void)
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{
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if (framebuffer.mapped)
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grub_pci_device_unmap_range (framebuffer.dev, framebuffer.ptr,
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BOCHS_APERTURE_SIZE);
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if (state_saved)
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{
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restore_state (&initial_state);
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state_saved = 0;
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}
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return grub_video_fb_fini ();
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}
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static grub_err_t
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doublebuf_pageflipping_set_page (int page)
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{
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int start = framebuffer.mode_info.height * page;
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vbe_write (start, BOCHS_VBE_Y_OFFSET);
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return GRUB_ERR_NONE;
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}
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static grub_err_t
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grub_video_bochs_set_palette (unsigned int start, unsigned int count,
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struct grub_video_palette_data *palette_data)
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{
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if (framebuffer.mode_info.mode_type == GRUB_VIDEO_MODE_TYPE_INDEX_COLOR)
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{
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unsigned i;
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if (start >= 0x100)
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return GRUB_ERR_NONE;
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if (start + count >= 0x100)
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count = 0x100 - start;
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for (i = 0; i < count; i++)
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palette_write (start + i, palette_data[i].r, palette_data[i].g,
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palette_data[i].b);
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}
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/* Then set color to emulated palette. */
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return grub_video_fb_set_palette (start, count, palette_data);
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}
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static grub_err_t
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grub_video_bochs_setup (unsigned int width, unsigned int height,
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unsigned int mode_type, unsigned int mode_mask)
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{
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int depth;
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grub_err_t err;
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int found = 0;
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int pitch, bytes_per_pixel;
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grub_size_t page_size; /* The size of a page in bytes. */
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auto int NESTED_FUNC_ATTR find_card (grub_pci_device_t dev, grub_pci_id_t pciid __attribute__ ((unused)));
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int NESTED_FUNC_ATTR find_card (grub_pci_device_t dev, grub_pci_id_t pciid)
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{
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grub_pci_address_t addr;
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grub_uint32_t class;
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addr = grub_pci_make_address (dev, GRUB_PCI_REG_CLASS);
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class = grub_pci_read (addr);
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if (((class >> 16) & 0xffff) != 0x0300 || pciid != 0x11111234)
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return 0;
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found = 1;
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addr = grub_pci_make_address (dev, GRUB_PCI_REG_ADDRESS_REG0);
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framebuffer.base = grub_pci_read (addr) & GRUB_PCI_ADDR_MEM_MASK;
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framebuffer.dev = dev;
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return 1;
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}
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/* Decode depth from mode_type. If it is zero, then autodetect. */
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depth = (mode_type & GRUB_VIDEO_MODE_TYPE_DEPTH_MASK)
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>> GRUB_VIDEO_MODE_TYPE_DEPTH_POS;
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if (width == 0 || height == 0)
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{
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width = 800;
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height = 600;
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}
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if (width > BOCHS_MAX_WIDTH)
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return grub_error (GRUB_ERR_IO, "width must be at most",
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BOCHS_MAX_WIDTH);
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if (height > BOCHS_MAX_HEIGHT)
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return grub_error (GRUB_ERR_IO, "height must be at most",
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BOCHS_MAX_HEIGHT);
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if (width & (BOCHS_WIDTH_ALIGN - 1))
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return grub_error (GRUB_ERR_IO, "width must be a multiple of %d",
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BOCHS_WIDTH_ALIGN);
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if (depth == 0
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&& !grub_video_check_mode_flag (mode_type, mode_mask,
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GRUB_VIDEO_MODE_TYPE_INDEX_COLOR, 0))
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depth = 24;
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if (depth == 0)
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depth = 8;
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if (depth != 32 && depth != 24 && depth != 16 && depth != 15 && depth != 8
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&& depth != 4)
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return grub_error (GRUB_ERR_IO, "only 32, 24, 16, 15 and 8-bpp are"
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" supported by bochs video");
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if (depth == 4)
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return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET, "4-bpp isn't cupported");
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bytes_per_pixel = (depth + 7) / 8;
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if (depth == 4)
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pitch = width / 2;
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else
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pitch = width * bytes_per_pixel;
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page_size = pitch * height;
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if (page_size > BOCHS_APERTURE_SIZE)
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return grub_error (GRUB_ERR_IO, "Not enough video memory for this mode");
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grub_pci_iterate (find_card);
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if (!found)
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return grub_error (GRUB_ERR_IO, "Couldn't find graphics card");
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if (found && framebuffer.base == 0)
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{
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/* FIXME: change framebuffer base */
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return grub_error (GRUB_ERR_IO, "PCI BAR not set");
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}
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/* We can safely discard volatile attribute. */
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framebuffer.ptr = (void *) grub_pci_device_map_range (framebuffer.dev,
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framebuffer.base,
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BOCHS_APERTURE_SIZE);
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framebuffer.mapped = 1;
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if (!state_saved)
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{
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save_state (&initial_state);
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state_saved = 1;
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}
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{
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vbe_write (0, BOCHS_VBE_ENABLE);
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vbe_write (width, BOCHS_VBE_WIDTH);
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vbe_write (height, BOCHS_VBE_HEIGHT);
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vbe_write (depth, BOCHS_VBE_BPP);
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vbe_write (1, BOCHS_VBE_ENABLE);
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doublebuf_pageflipping_set_page (0);
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}
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/* Fill mode info details. */
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framebuffer.mode_info.width = width;
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framebuffer.mode_info.height = height;
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framebuffer.mode_info.mode_type = GRUB_VIDEO_MODE_TYPE_RGB;
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framebuffer.mode_info.bpp = depth;
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framebuffer.mode_info.bytes_per_pixel = bytes_per_pixel;
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framebuffer.mode_info.pitch = pitch;
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framebuffer.mode_info.number_of_colors = 256;
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framebuffer.mode_info.reserved_mask_size = 0;
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framebuffer.mode_info.reserved_field_pos = 0;
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switch (depth)
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{
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case 4:
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case 8:
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framebuffer.mode_info.mode_type = GRUB_VIDEO_MODE_TYPE_INDEX_COLOR;
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break;
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case 16:
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framebuffer.mode_info.red_mask_size = 5;
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framebuffer.mode_info.red_field_pos = 11;
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framebuffer.mode_info.green_mask_size = 6;
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framebuffer.mode_info.green_field_pos = 5;
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framebuffer.mode_info.blue_mask_size = 5;
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framebuffer.mode_info.blue_field_pos = 0;
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break;
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case 15:
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framebuffer.mode_info.red_mask_size = 5;
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framebuffer.mode_info.red_field_pos = 10;
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framebuffer.mode_info.green_mask_size = 5;
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framebuffer.mode_info.green_field_pos = 5;
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framebuffer.mode_info.blue_mask_size = 5;
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framebuffer.mode_info.blue_field_pos = 0;
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break;
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case 32:
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framebuffer.mode_info.reserved_mask_size = 8;
|
||||
framebuffer.mode_info.reserved_field_pos = 24;
|
||||
|
||||
case 24:
|
||||
framebuffer.mode_info.red_mask_size = 8;
|
||||
framebuffer.mode_info.red_field_pos = 16;
|
||||
framebuffer.mode_info.green_mask_size = 8;
|
||||
framebuffer.mode_info.green_field_pos = 8;
|
||||
framebuffer.mode_info.blue_mask_size = 8;
|
||||
framebuffer.mode_info.blue_field_pos = 0;
|
||||
break;
|
||||
}
|
||||
|
||||
framebuffer.mode_info.blit_format = grub_video_get_blit_format (&framebuffer.mode_info);
|
||||
|
||||
if (BOCHS_APERTURE_SIZE >= 2 * page_size)
|
||||
err = grub_video_fb_setup (mode_type, mode_mask,
|
||||
&framebuffer.mode_info,
|
||||
framebuffer.ptr,
|
||||
doublebuf_pageflipping_set_page,
|
||||
framebuffer.ptr + page_size);
|
||||
else
|
||||
err = grub_video_fb_setup (mode_type, mode_mask,
|
||||
&framebuffer.mode_info,
|
||||
framebuffer.ptr, 0, 0);
|
||||
|
||||
|
||||
/* Copy default palette to initialize emulated palette. */
|
||||
err = grub_video_bochs_set_palette (0, GRUB_VIDEO_FBSTD_NUMCOLORS,
|
||||
grub_video_fbstd_colors);
|
||||
return err;
|
||||
}
|
||||
|
||||
static struct grub_video_adapter grub_video_bochs_adapter =
|
||||
{
|
||||
.name = "Bochs PCI Video Driver",
|
||||
.id = GRUB_VIDEO_DRIVER_BOCHS,
|
||||
|
||||
.init = grub_video_bochs_video_init,
|
||||
.fini = grub_video_bochs_video_fini,
|
||||
.setup = grub_video_bochs_setup,
|
||||
.get_info = grub_video_fb_get_info,
|
||||
.get_info_and_fini = grub_video_fb_get_info_and_fini,
|
||||
.set_palette = grub_video_bochs_set_palette,
|
||||
.get_palette = grub_video_fb_get_palette,
|
||||
.set_viewport = grub_video_fb_set_viewport,
|
||||
.get_viewport = grub_video_fb_get_viewport,
|
||||
.map_color = grub_video_fb_map_color,
|
||||
.map_rgb = grub_video_fb_map_rgb,
|
||||
.map_rgba = grub_video_fb_map_rgba,
|
||||
.unmap_color = grub_video_fb_unmap_color,
|
||||
.fill_rect = grub_video_fb_fill_rect,
|
||||
.blit_bitmap = grub_video_fb_blit_bitmap,
|
||||
.blit_render_target = grub_video_fb_blit_render_target,
|
||||
.scroll = grub_video_fb_scroll,
|
||||
.swap_buffers = grub_video_fb_swap_buffers,
|
||||
.create_render_target = grub_video_fb_create_render_target,
|
||||
.delete_render_target = grub_video_fb_delete_render_target,
|
||||
.set_active_render_target = grub_video_fb_set_active_render_target,
|
||||
.get_active_render_target = grub_video_fb_get_active_render_target,
|
||||
|
||||
.next = 0
|
||||
};
|
||||
|
||||
GRUB_MOD_INIT(video_bochs)
|
||||
{
|
||||
grub_video_register (&grub_video_bochs_adapter);
|
||||
}
|
||||
|
||||
GRUB_MOD_FINI(video_bochs)
|
||||
{
|
||||
grub_video_unregister (&grub_video_bochs_adapter);
|
||||
}
|
||||
Loading…
Reference in a new issue