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dev: boot framebuffer support

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This commit is contained in:
max 🍓
2023-06-08 20:46:43 +01:00
parent ff8902ef1c
commit f83ecca490
10 changed files with 163 additions and 67 deletions
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3
arch/x86_64/include/socks/machine/init.h
View File

@@ -16,6 +16,9 @@ extern "C" {
extern int ml_init(uintptr_t arg);
extern const struct framebuffer_varinfo *bootfb_varinfo(void);
extern const struct framebuffer_fixedinfo *bootfb_fixedinfo(void);
#ifdef __cplusplus
}
#endif

54
arch/x86_64/init.c
View File

@@ -20,6 +20,8 @@
#define PTR32(x) ((void *)((uintptr_t)(x)))
static ml_cpu_block g_bootstrap_cpu = {0};
static struct framebuffer_varinfo __bootfb_varinfo;
static struct framebuffer_fixedinfo __bootfb_fixedinfo;
/* start and end of kernel image (physical addresses) */
extern char __pstart[], __pend[];
@@ -44,10 +46,51 @@ static void early_vm_init(void)
printk("memblock: reserved bios+kernel at [0x%016llx-0x%016llx]", 0, (uintptr_t)__pend);
}
static void init_bootfb(multiboot_info_t *mb)
{
__bootfb_varinfo.fb_xres = mb->framebuffer_width;
__bootfb_varinfo.fb_yres = mb->framebuffer_height;
__bootfb_varinfo.fb_bpp = mb->framebuffer_bpp;
__bootfb_varinfo.fb_stride = mb->framebuffer_pitch;
switch (mb->framebuffer_type) {
case MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED:
__bootfb_varinfo.fb_flags = FB_MODE_PALETTE;
__bootfb_varinfo.fb_palette_addr = mb->framebuffer_palette_addr;
__bootfb_varinfo.fb_palette_nr_colours = mb->framebuffer_palette_num_colors;
break;
case MULTIBOOT_FRAMEBUFFER_TYPE_RGB:
__bootfb_varinfo.fb_flags = FB_MODE_RGB;
__bootfb_varinfo.fb_red.b_length = mb->framebuffer_red_mask_size;
__bootfb_varinfo.fb_red.b_offset = mb->framebuffer_red_field_position;
__bootfb_varinfo.fb_green.b_length = mb->framebuffer_green_mask_size;
__bootfb_varinfo.fb_green.b_offset = mb->framebuffer_green_field_position;
__bootfb_varinfo.fb_blue.b_length = mb->framebuffer_blue_mask_size;
__bootfb_varinfo.fb_blue.b_offset = mb->framebuffer_blue_field_position;
__bootfb_varinfo.fb_alpha.b_length = 0;
__bootfb_varinfo.fb_alpha.b_offset = 0;
break;
case MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT:
__bootfb_varinfo.fb_flags = FB_MODE_VGATEXT;
__bootfb_varinfo.fb_xcells = 80;
__bootfb_varinfo.fb_ycells = 25;
break;
default:
break;
}
__bootfb_fixedinfo.fb_baseptr = mb->framebuffer_addr;
}
int ml_init(uintptr_t arg)
{
multiboot_info_t *mb = (multiboot_info_t *)arg;
init_bootfb(mb);
bootstrap_cpu_init();
vgacon_init();
serialcon_init(115200);
@@ -56,6 +99,7 @@ int ml_init(uintptr_t arg)
print_kernel_banner();
early_vm_init();
printk("video mode: %ux%u", mb->framebuffer_width, mb->framebuffer_height);
e820_scan(PTR32(mb->mmap_addr), mb->mmap_length);
@@ -91,3 +135,13 @@ int ml_init(uintptr_t arg)
return 0;
}
const struct framebuffer_varinfo *bootfb_varinfo(void)
{
return &__bootfb_varinfo;
}
const struct framebuffer_fixedinfo *bootfb_fixedinfo(void)
{
return &__bootfb_fixedinfo;
}