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vbe: Fix handling of VBE versions older than 3.0

This commit is contained in:
mintsuki 2020-11-29 08:26:08 +01:00
parent 3a8c9fc52c
commit 5c87714541
6 changed files with 45 additions and 37 deletions
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2
.gitignore vendored
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@ -6,7 +6,7 @@
/**/*.bin
/**/*.bin.gz
/**/*.elf
/**/*.img
/**/*.hdd
/bochsout.txt
/bx_enh_dbg.ini
.vscode

43
Makefile
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@ -2,7 +2,7 @@ CC = cc
CFLAGS = -O2 -pipe -Wall -Wextra
PATH := $(shell pwd)/toolchain/bin:$(PATH)
.PHONY: all clean stage2 stage2-clean decompressor decompressor-clean toolchain test.img echfs-test ext2-test fat32-test
.PHONY: all clean stage2 stage2-clean decompressor decompressor-clean toolchain test.hdd echfs-test ext2-test fat32-test
all: stage2 decompressor
gzip -n -9 < stage2/stage2.bin > stage2/stage2.bin.gz
@ -37,29 +37,30 @@ toolchain:
limine-install: limine-install.c
$(CC) $(CFLAGS) limine-install.c -o limine-install
test.img:
rm -f test.img
dd if=/dev/zero bs=1M count=0 seek=64 of=test.img
parted -s test.img mklabel msdos
parted -s test.img mkpart primary 2048s 100%
test.hdd:
rm -f test.hdd
dd if=/dev/zero bs=1M count=0 seek=64 of=test.hdd
parted -s test.hdd mklabel msdos
parted -s test.hdd mkpart primary 2048s 100%
echfs-test: limine-install test.img
echfs-test: all limine-install test.hdd
$(MAKE) -C test
echfs-utils -m -p0 test.img quick-format 512 > part_guid
echfs-utils -m -p0 test.hdd quick-format 512 > part_guid
sed "s/@GUID@/`cat part_guid`/g" < test/limine.cfg > limine.cfg.tmp
echfs-utils -m -p0 test.img import limine.cfg.tmp limine.cfg
echfs-utils -m -p0 test.hdd import limine.cfg.tmp limine.cfg
rm -f limine.cfg.tmp part_guid
echfs-utils -m -p0 test.img import test/test.elf boot/test.elf
echfs-utils -m -p0 test.img import test/bg.bmp bg.bmp
./limine-install limine.bin test.img
qemu-system-x86_64 -net none -smp 4 -enable-kvm -cpu host -hda test.img -debugcon stdio
echfs-utils -m -p0 test.hdd import stage2.map boot/stage2.map
echfs-utils -m -p0 test.hdd import test/test.elf boot/test.elf
echfs-utils -m -p0 test.hdd import test/bg.bmp boot/bg.bmp
./limine-install limine.bin test.hdd
qemu-system-x86_64 -net none -smp 4 -enable-kvm -cpu host -hda test.hdd -debugcon stdio
ext2-test: limine-install test.img
ext2-test: all limine-install test.hdd
$(MAKE) -C test
cp stage2.map test/
rm -rf test_image/
mkdir test_image
sudo losetup -Pf --show test.img > loopback_dev
sudo losetup -Pf --show test.hdd > loopback_dev
sudo partprobe `cat loopback_dev`
sudo mkfs.ext2 `cat loopback_dev`p1
sudo mount `cat loopback_dev`p1 test_image
@ -69,14 +70,14 @@ ext2-test: limine-install test.img
sudo umount test_image/
sudo losetup -d `cat loopback_dev`
rm -rf test_image loopback_dev
./limine-install limine.bin test.img
qemu-system-x86_64 -net none -smp 4 -enable-kvm -cpu host -hda test.img -debugcon stdio
./limine-install limine.bin test.hdd
qemu-system-x86_64 -net none -smp 4 -enable-kvm -cpu host -hda test.hdd -debugcon stdio
fat32-test: limine-install test.img
fat32-test: all limine-install test.hdd
$(MAKE) -C test
rm -rf test_image/
mkdir test_image
sudo losetup -Pf --show test.img > loopback_dev
sudo losetup -Pf --show test.hdd > loopback_dev
sudo partprobe `cat loopback_dev`
sudo mkfs.fat -F 32 `cat loopback_dev`p1
sudo mount `cat loopback_dev`p1 test_image
@ -86,5 +87,5 @@ fat32-test: limine-install test.img
sudo umount test_image/
sudo losetup -d `cat loopback_dev`
rm -rf test_image loopback_dev
./limine-install limine.bin test.img
qemu-system-x86_64 -net none -smp 4 -enable-kvm -cpu host -hda test.img -debugcon stdio
./limine-install limine.bin test.hdd
qemu-system-x86_64 -net none -smp 4 -enable-kvm -cpu host -hda test.hdd -debugcon stdio

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limine-pxe.bin
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limine.bin
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stage2.map
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37
stage2/drivers/vbe.c
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@ -538,12 +538,6 @@ bool init_vbe(struct vbe_framebuffer_info *ret,
get_vbe_info(&vbe_info);
print("vbe: Version: %u.%u\n", vbe_info.version_maj, vbe_info.version_min);
if (vbe_info.version_maj < 3) {
print("vbe: We do not support VBE versions older than 3.0\n");
return false;
}
print("vbe: OEM: %s\n", (char *)rm_desegment(vbe_info.oem_seg, vbe_info.oem_off));
print("vbe: Graphics vendor: %s\n", (char *)rm_desegment(vbe_info.vendor_seg, vbe_info.vendor_off));
print("vbe: Product name: %s\n", (char *)rm_desegment(vbe_info.prod_name_seg, vbe_info.prod_name_off));
@ -571,10 +565,10 @@ bool init_vbe(struct vbe_framebuffer_info *ret,
target_width, target_height, target_bpp);
}
retry:;
uint16_t *vid_modes = (uint16_t *)rm_desegment(vbe_info.vid_modes_seg,
vbe_info.vid_modes_off);
retry:
for (size_t i = 0; vid_modes[i] != 0xffff; i++) {
struct vbe_mode_info_struct vbe_mode_info;
get_vbe_mode_info(&vbe_mode_info, vid_modes[i]);
@ -584,6 +578,9 @@ retry:;
// We only support RGB for now
if (vbe_mode_info.memory_model != 0x06)
continue;
// We only support linear modes
if (!(vbe_mode_info.mode_attributes & (1 << 7)))
continue;
print("vbe: Found matching mode %x, attempting to set...\n", vid_modes[i]);
if (set_vbe_mode(vid_modes[i]) == 0x01) {
print("vbe: Failed to set video mode %x, moving on...\n", vid_modes[i]);
@ -592,16 +589,26 @@ retry:;
print("vbe: Framebuffer address: %x\n", vbe_mode_info.framebuffer_addr);
ret->memory_model = vbe_mode_info.memory_model;
ret->framebuffer_addr = vbe_mode_info.framebuffer_addr;
ret->framebuffer_pitch = vbe_mode_info.lin_bytes_per_scanline;
ret->framebuffer_width = vbe_mode_info.res_x;
ret->framebuffer_height = vbe_mode_info.res_y;
ret->framebuffer_bpp = vbe_mode_info.bpp;
ret->red_mask_size = vbe_mode_info.lin_red_mask_size;
ret->red_mask_shift = vbe_mode_info.lin_red_mask_shift;
ret->green_mask_size = vbe_mode_info.lin_green_mask_size;
ret->green_mask_shift = vbe_mode_info.lin_green_mask_shift;
ret->blue_mask_size = vbe_mode_info.lin_blue_mask_size;
ret->blue_mask_shift = vbe_mode_info.lin_blue_mask_shift;
if (vbe_info.version_maj < 3) {
ret->framebuffer_pitch = vbe_mode_info.bytes_per_scanline;
ret->red_mask_size = vbe_mode_info.red_mask_size;
ret->red_mask_shift = vbe_mode_info.red_mask_shift;
ret->green_mask_size = vbe_mode_info.green_mask_size;
ret->green_mask_shift = vbe_mode_info.green_mask_shift;
ret->blue_mask_size = vbe_mode_info.blue_mask_size;
ret->blue_mask_shift = vbe_mode_info.blue_mask_shift;
} else {
ret->framebuffer_pitch = vbe_mode_info.lin_bytes_per_scanline;
ret->red_mask_size = vbe_mode_info.lin_red_mask_size;
ret->red_mask_shift = vbe_mode_info.lin_red_mask_shift;
ret->green_mask_size = vbe_mode_info.lin_green_mask_size;
ret->green_mask_shift = vbe_mode_info.lin_green_mask_shift;
ret->blue_mask_size = vbe_mode_info.lin_blue_mask_size;
ret->blue_mask_shift = vbe_mode_info.lin_blue_mask_shift;
}
return true;
}
}
@ -614,5 +621,5 @@ retry:;
goto retry;
}
panic("Could not set a video mode");
return false;
}