Add bochs video support

This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-05-17 01:18:50 +02:00
parent 9a3e298a7e
commit 368e544ba6
3 changed files with 507 additions and 1 deletions

View file

@ -20,6 +20,11 @@ video_cirrus_mod_SOURCES = video/cirrus.c
video_cirrus_mod_CFLAGS = $(COMMON_CFLAGS) video_cirrus_mod_CFLAGS = $(COMMON_CFLAGS)
video_cirrus_mod_LDFLAGS = $(COMMON_LDFLAGS) video_cirrus_mod_LDFLAGS = $(COMMON_LDFLAGS)
pkglib_MODULES += video_bochs.mod
video_bochs_mod_SOURCES = video/bochs.c
video_bochs_mod_CFLAGS = $(COMMON_CFLAGS)
video_bochs_mod_LDFLAGS = $(COMMON_LDFLAGS)
pkglib_MODULES += relocator.mod pkglib_MODULES += relocator.mod
relocator_mod_SOURCES = lib/i386/relocator.c lib/i386/relocator_asm.S lib/i386/relocator_backward.S relocator_mod_SOURCES = lib/i386/relocator.c lib/i386/relocator_asm.S lib/i386/relocator_backward.S
relocator_mod_CFLAGS = $(COMMON_CFLAGS) relocator_mod_CFLAGS = $(COMMON_CFLAGS)

View file

@ -183,7 +183,8 @@ typedef enum grub_video_driver_id
GRUB_VIDEO_DRIVER_EFI_GOP, GRUB_VIDEO_DRIVER_EFI_GOP,
GRUB_VIDEO_DRIVER_SM712, GRUB_VIDEO_DRIVER_SM712,
GRUB_VIDEO_DRIVER_VGA, GRUB_VIDEO_DRIVER_VGA,
GRUB_VIDEO_DRIVER_CIRRUS GRUB_VIDEO_DRIVER_CIRRUS,
GRUB_VIDEO_DRIVER_BOCHS
} grub_video_driver_id_t; } grub_video_driver_id_t;
struct grub_video_adapter struct grub_video_adapter

500
video/bochs.c Normal file
View file

@ -0,0 +1,500 @@
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2005,2006,2007,2008,2009,2010 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#define grub_video_render_target grub_video_fbrender_target
#include <grub/err.h>
#include <grub/types.h>
#include <grub/dl.h>
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/video.h>
#include <grub/video_fb.h>
#include <grub/pci.h>
static struct
{
struct grub_video_mode_info mode_info;
grub_uint8_t *ptr;
int mapped;
grub_uint32_t base;
grub_pci_device_t dev;
} framebuffer;
#define BOCHS_APERTURE_SIZE 0x800000
#define BOCHS_MAX_WIDTH 1600
#define BOCHS_MAX_HEIGHT 1200
#define BOCHS_WIDTH_ALIGN 8
enum
{
CIRRUS_SR_MEMORY_MODE = 4,
CIRRUS_SR_EXTENDED_MODE = 7,
CIRRUS_SR_MAX
};
#define CIRRUS_SR_MEMORY_MODE_CHAIN4 8
enum
{
BOCHS_VBE_INDEX = 0x1ce,
BOCHS_VBE_DATA = 0x1cf,
SR_INDEX = 0x3c4,
SR_DATA = 0x3c5,
BOCHS_PALLETTE_READ_INDEX = 0x3c7,
BOCHS_PALLETTE_WRITE_INDEX = 0x3c8,
BOCHS_PALLETTE_DATA = 0x3c9,
GR_INDEX = 0x3ce,
GR_DATA = 0x3cf,
CR_INDEX = 0x3d4,
CR_DATA = 0x3d5,
};
enum
{
BOCHS_VBE_WIDTH = 1,
BOCHS_VBE_HEIGHT = 2,
BOCHS_VBE_BPP = 3,
BOCHS_VBE_ENABLE = 4,
BOCHS_VBE_Y_OFFSET = 9,
BOCHS_VBE_MAX
};
static void
vbe_write (grub_uint16_t val, grub_uint16_t addr)
{
grub_outw (addr, BOCHS_VBE_INDEX);
grub_outw (val, BOCHS_VBE_DATA);
}
static grub_uint16_t
vbe_read (grub_uint16_t addr)
{
grub_outw (addr, BOCHS_VBE_INDEX);
return grub_inw (BOCHS_VBE_DATA);
}
static void
gr_write (grub_uint8_t val, grub_uint8_t addr)
{
grub_outb (addr, GR_INDEX);
grub_outb (val, GR_DATA);
}
static grub_uint8_t
gr_read (grub_uint8_t addr)
{
grub_outb (addr, GR_INDEX);
return grub_inb (GR_DATA);
}
static void
cr_write (grub_uint8_t val, grub_uint8_t addr)
{
grub_outb (addr, CR_INDEX);
grub_outb (val, CR_DATA);
}
static grub_uint8_t
cr_read (grub_uint8_t addr)
{
grub_outb (addr, CR_INDEX);
return grub_inb (CR_DATA);
}
static void
palette_read (grub_uint8_t addr, grub_uint8_t *r, grub_uint8_t *g,
grub_uint8_t *b)
{
grub_outb (addr, BOCHS_PALLETTE_READ_INDEX);
*r = grub_inb (BOCHS_PALLETTE_DATA);
*g = grub_inb (BOCHS_PALLETTE_DATA);
*b = grub_inb (BOCHS_PALLETTE_DATA);
}
static void
palette_write (grub_uint8_t addr, grub_uint8_t r, grub_uint8_t g,
grub_uint8_t b)
{
grub_outb (addr, BOCHS_PALLETTE_READ_INDEX);
grub_outb (r, BOCHS_PALLETTE_DATA);
grub_outb (g, BOCHS_PALLETTE_DATA);
grub_outb (b, BOCHS_PALLETTE_DATA);
}
static void
sr_write (grub_uint8_t val, grub_uint8_t addr)
{
grub_outb (addr, SR_INDEX);
grub_outb (val, SR_DATA);
}
static grub_uint8_t
sr_read (grub_uint8_t addr)
{
grub_outb (addr, SR_INDEX);
return grub_inb (SR_DATA);
}
struct saved_state
{
grub_uint8_t cr[256];
grub_uint8_t gr[256];
grub_uint8_t sr[256];
grub_uint8_t r[256];
grub_uint8_t g[256];
grub_uint8_t b[256];
grub_uint8_t vbe[BOCHS_VBE_MAX];
int vbe_enable;
/* We need to preserve VGA font and VGA text. */
grub_uint8_t vram[32 * 4 * 256];
};
static struct saved_state initial_state;
static int state_saved = 0;
static void
save_state (struct saved_state *st)
{
unsigned i;
for (i = 0; i < ARRAY_SIZE (st->cr); i++)
st->cr[i] = cr_read (i);
for (i = 0; i < ARRAY_SIZE (st->gr); i++)
st->gr[i] = gr_read (i);
for (i = 0; i < ARRAY_SIZE (st->sr); i++)
st->sr[i] = sr_read (i);
grub_printf ("%d\n", st->cr[1]);
for (i = 0; i < 256; i++)
palette_read (i, st->r + i, st->g + i, st->b + i);
st->vbe_enable = vbe_read (BOCHS_VBE_ENABLE) & 1;
if (st->vbe_enable)
for (i = 0; i < ARRAY_SIZE (st->vbe); i++)
st->vbe[i] = vbe_read (i);
sr_write (CIRRUS_SR_MEMORY_MODE_CHAIN4, CIRRUS_SR_MEMORY_MODE);
grub_memcpy (st->vram, framebuffer.ptr, sizeof (st->vram));
sr_write (st->sr[CIRRUS_SR_MEMORY_MODE], CIRRUS_SR_MEMORY_MODE);
}
static void
restore_state (struct saved_state *st)
{
unsigned i;
if (st->vbe_enable)
for (i = 0; i < ARRAY_SIZE (st->vbe); i++)
vbe_write (st->vbe[i], i);
else
vbe_write (0, BOCHS_VBE_ENABLE);
cr_write (0, 0x11);
for (i = 0; i < ARRAY_SIZE (st->cr); i++)
cr_write (st->cr[i], i);
for (i = 0; i < ARRAY_SIZE (st->sr); i++)
sr_write (st->sr[i], i);
for (i = 0; i < ARRAY_SIZE (st->gr); i++)
gr_write (st->gr[i], i);
for (i = 0; i < 256; i++)
palette_write (i, st->r[i], st->g[i], st->b[i]);
sr_write (CIRRUS_SR_MEMORY_MODE_CHAIN4, CIRRUS_SR_MEMORY_MODE);
grub_memcpy (framebuffer.ptr, st->vram, sizeof (st->vram));
sr_write (st->sr[CIRRUS_SR_MEMORY_MODE], CIRRUS_SR_MEMORY_MODE);
}
static grub_err_t
grub_video_bochs_video_init (void)
{
/* Reset frame buffer. */
grub_memset (&framebuffer, 0, sizeof(framebuffer));
return grub_video_fb_init ();
}
static grub_err_t
grub_video_bochs_video_fini (void)
{
if (framebuffer.mapped)
grub_pci_device_unmap_range (framebuffer.dev, framebuffer.ptr,
BOCHS_APERTURE_SIZE);
if (state_saved)
{
restore_state (&initial_state);
state_saved = 0;
}
return grub_video_fb_fini ();
}
static grub_err_t
doublebuf_pageflipping_set_page (int page)
{
int start = framebuffer.mode_info.height * page;
vbe_write (start, BOCHS_VBE_Y_OFFSET);
return GRUB_ERR_NONE;
}
static grub_err_t
grub_video_bochs_set_palette (unsigned int start, unsigned int count,
struct grub_video_palette_data *palette_data)
{
if (framebuffer.mode_info.mode_type == GRUB_VIDEO_MODE_TYPE_INDEX_COLOR)
{
unsigned i;
if (start >= 0x100)
return GRUB_ERR_NONE;
if (start + count >= 0x100)
count = 0x100 - start;
for (i = 0; i < count; i++)
palette_write (start + i, palette_data[i].r, palette_data[i].g,
palette_data[i].b);
}
/* Then set color to emulated palette. */
return grub_video_fb_set_palette (start, count, palette_data);
}
static grub_err_t
grub_video_bochs_setup (unsigned int width, unsigned int height,
unsigned int mode_type, unsigned int mode_mask)
{
int depth;
grub_err_t err;
int found = 0;
int pitch, bytes_per_pixel;
grub_size_t page_size; /* The size of a page in bytes. */
auto int NESTED_FUNC_ATTR find_card (grub_pci_device_t dev, grub_pci_id_t pciid __attribute__ ((unused)));
int NESTED_FUNC_ATTR find_card (grub_pci_device_t dev, grub_pci_id_t pciid)
{
grub_pci_address_t addr;
grub_uint32_t class;
addr = grub_pci_make_address (dev, GRUB_PCI_REG_CLASS);
class = grub_pci_read (addr);
if (((class >> 16) & 0xffff) != 0x0300 || pciid != 0x11111234)
return 0;
found = 1;
addr = grub_pci_make_address (dev, GRUB_PCI_REG_ADDRESS_REG0);
framebuffer.base = grub_pci_read (addr) & GRUB_PCI_ADDR_MEM_MASK;
framebuffer.dev = dev;
return 1;
}
/* Decode depth from mode_type. If it is zero, then autodetect. */
depth = (mode_type & GRUB_VIDEO_MODE_TYPE_DEPTH_MASK)
>> GRUB_VIDEO_MODE_TYPE_DEPTH_POS;
if (width == 0 || height == 0)
{
width = 800;
height = 600;
}
if (width > BOCHS_MAX_WIDTH)
return grub_error (GRUB_ERR_IO, "width must be at most",
BOCHS_MAX_WIDTH);
if (height > BOCHS_MAX_HEIGHT)
return grub_error (GRUB_ERR_IO, "height must be at most",
BOCHS_MAX_HEIGHT);
if (width & (BOCHS_WIDTH_ALIGN - 1))
return grub_error (GRUB_ERR_IO, "width must be a multiple of %d",
BOCHS_WIDTH_ALIGN);
if (depth == 0
&& !grub_video_check_mode_flag (mode_type, mode_mask,
GRUB_VIDEO_MODE_TYPE_INDEX_COLOR, 0))
depth = 24;
if (depth == 0)
depth = 8;
if (depth != 32 && depth != 24 && depth != 16 && depth != 15 && depth != 8
&& depth != 4)
return grub_error (GRUB_ERR_IO, "only 32, 24, 16, 15 and 8-bpp are"
" supported by bochs video");
if (depth == 4)
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET, "4-bpp isn't cupported");
bytes_per_pixel = (depth + 7) / 8;
if (depth == 4)
pitch = width / 2;
else
pitch = width * bytes_per_pixel;
page_size = pitch * height;
if (page_size > BOCHS_APERTURE_SIZE)
return grub_error (GRUB_ERR_IO, "Not enough video memory for this mode");
grub_pci_iterate (find_card);
if (!found)
return grub_error (GRUB_ERR_IO, "Couldn't find graphics card");
if (found && framebuffer.base == 0)
{
/* FIXME: change framebuffer base */
return grub_error (GRUB_ERR_IO, "PCI BAR not set");
}
/* We can safely discard volatile attribute. */
framebuffer.ptr = (void *) grub_pci_device_map_range (framebuffer.dev,
framebuffer.base,
BOCHS_APERTURE_SIZE);
framebuffer.mapped = 1;
if (!state_saved)
{
save_state (&initial_state);
state_saved = 1;
}
{
vbe_write (0, BOCHS_VBE_ENABLE);
vbe_write (width, BOCHS_VBE_WIDTH);
vbe_write (height, BOCHS_VBE_HEIGHT);
vbe_write (depth, BOCHS_VBE_BPP);
vbe_write (1, BOCHS_VBE_ENABLE);
doublebuf_pageflipping_set_page (0);
}
/* Fill mode info details. */
framebuffer.mode_info.width = width;
framebuffer.mode_info.height = height;
framebuffer.mode_info.mode_type = GRUB_VIDEO_MODE_TYPE_RGB;
framebuffer.mode_info.bpp = depth;
framebuffer.mode_info.bytes_per_pixel = bytes_per_pixel;
framebuffer.mode_info.pitch = pitch;
framebuffer.mode_info.number_of_colors = 256;
framebuffer.mode_info.reserved_mask_size = 0;
framebuffer.mode_info.reserved_field_pos = 0;
switch (depth)
{
case 4:
case 8:
framebuffer.mode_info.mode_type = GRUB_VIDEO_MODE_TYPE_INDEX_COLOR;
break;
case 16:
framebuffer.mode_info.red_mask_size = 5;
framebuffer.mode_info.red_field_pos = 11;
framebuffer.mode_info.green_mask_size = 6;
framebuffer.mode_info.green_field_pos = 5;
framebuffer.mode_info.blue_mask_size = 5;
framebuffer.mode_info.blue_field_pos = 0;
break;
case 15:
framebuffer.mode_info.red_mask_size = 5;
framebuffer.mode_info.red_field_pos = 10;
framebuffer.mode_info.green_mask_size = 5;
framebuffer.mode_info.green_field_pos = 5;
framebuffer.mode_info.blue_mask_size = 5;
framebuffer.mode_info.blue_field_pos = 0;
break;
case 32:
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);
}