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-rw-r--r--src/kernel/boot.asm4
-rw-r--r--src/kernel/graphics/vesa.c28
-rw-r--r--src/kernel/graphics/vesa.h1
-rw-r--r--src/kernel/interact.asm8
-rw-r--r--src/kernel/io/io.c8
-rw-r--r--src/kernel/kernel.c2
-rw-r--r--src/kernel/paging/kheap.h4
7 files changed, 32 insertions, 23 deletions
diff --git a/src/kernel/boot.asm b/src/kernel/boot.asm
index 97e68f5..de5a386 100644
--- a/src/kernel/boot.asm
+++ b/src/kernel/boot.asm
@@ -54,7 +54,7 @@ copy_page_physical:
and edx, 0x7fffffff
mov cr0, edx
- mov edx, 1024
+ mov edx, 0x400
%include "src/kernel/gdt/gdt.asm"
@@ -68,5 +68,5 @@ copy_page_physical:
; Store the stack
SECTION .bss
- resb 8192 ; Reserve 8KiB
+ resb 0x2000 ; Reserve 8KiB
_sys_stack: \ No newline at end of file
diff --git a/src/kernel/graphics/vesa.c b/src/kernel/graphics/vesa.c
index 8c85d49..3c55f70 100644
--- a/src/kernel/graphics/vesa.c
+++ b/src/kernel/graphics/vesa.c
@@ -7,6 +7,8 @@
#include "font.h"
#include "../paging/paging.h"
+extern page_directory_t *kernel_directory;
+
void switch_to_vga() {
serial_write("Force switch to VGA!\n");
vesa_available = 0;
@@ -31,16 +33,20 @@ struct edid_data get_edid() {
}
void vbe_set_mode(unsigned short mode) {
- serial_write("Setting VBE mode!\n");
+ serial_write("Setting VBE mode: ");
serial_write_hex(mode);
+ serial_write("\n");
vesa_available = 0;
regs16_t regs;
regs.ax = 0x4F02;
- regs.bx |= 0b0100000000000000;
- regs.bx &= 0b0111111111111111;
+ regs.bx = mode;
+ regs.bx = mode | (1 << 14);
disable_paging();
int32(0x10, &regs);
enable_paging();
+
+ if (regs.ax != 0x004F) switch_to_vga();
+ else vesa_available = 1;
}
uint16_t *vbe_get_modes() {
@@ -54,7 +60,7 @@ uint16_t *vbe_get_modes() {
regs.es = 0;
regs.di = 0x7E00;
disable_paging();
- int32(0x10, &regs); // CRASH
+ int32(0x10, &regs);
enable_paging();
struct vbe_info *info = (struct vbe_info *) info_address;
@@ -93,6 +99,7 @@ struct vbe_mode_info *vbe_get_mode_info(uint16_t mode) {
mode_info_final->height = mode_info->height;
mode_info_final->bpp = mode_info->bpp;
mode_info_final->pitch = mode_info->pitch;
+ mode_info_final->memory_model = mode_info->memory_model;
mode_info_final->framebuffer = mode_info->framebuffer;
return mode_info_final;
@@ -106,9 +113,11 @@ void set_optimal_resolution() {
for (uint16_t *mode = video_modes; *mode != 0xFFFF; mode++) {
struct vbe_mode_info *mode_info = vbe_get_mode_info(*mode);
- if (mode_info->width >= highest_width /*&&
+ if (mode_info->width >= highest_width &&
(float) mode_info->width / (float) mode_info->height < 2.0 &&
- (mode_info->attributes & 0x80) != 0*/) {
+ (mode_info->attributes & 0x1) != 0x1 &&
+ (mode_info->attributes & 0x90) != 0x90 &&
+ mode_info->memory_model != 6) {
highest = *mode;
highest_width = mode_info->width;
kfree(mode_info);
@@ -123,6 +132,9 @@ void set_optimal_resolution() {
vbe_bpp = highest_info->bpp / 8;
vbe_pitch = highest_info->pitch;
fb = (char *) highest_info->framebuffer;
+ uint32_t fb_psize = vbe_width * vbe_height * vbe_bpp;
+ for (uint32_t z = 0; z < fb_psize; z += 4096)
+ alloc_frame(get_page((uint32_t) (fb + z), 1, kernel_directory), 1, 1);
serial_write("Reached set mode!\n");
vbe_set_mode(highest);
@@ -143,7 +155,7 @@ void vesa_clear() {
}
void vesa_set_pixel(uint16_t x, uint16_t y, uint32_t color) {
- unsigned pos = x * (vbe_bpp) + y * vbe_pitch;
+ unsigned pos = x * vbe_bpp + y * vbe_pitch;
fb[pos] = color & 255;
fb[pos + 1] = (color >> 8) & 255;
fb[pos + 2] = (color >> 16) & 255;
@@ -179,7 +191,7 @@ void vesa_draw_rectangle(int x1, int y1, int x2, int y2, int color) {
}
void vesa_draw_string(char *data) {
- vesa_clear();
+ // vesa_clear(); // PAGE FAULT?!
int i = 0;
while (data[i] != '\0') {
vesa_draw_char(data[i], terminal_x, terminal_y);
diff --git a/src/kernel/graphics/vesa.h b/src/kernel/graphics/vesa.h
index d24e2d2..4c78219 100644
--- a/src/kernel/graphics/vesa.h
+++ b/src/kernel/graphics/vesa.h
@@ -103,6 +103,7 @@ struct vbe_mode_info {
uint16_t width;
uint16_t height;
uint8_t bpp;
+ uint8_t memory_model;
uint32_t framebuffer;
} __attribute__ ((packed));
diff --git a/src/kernel/interact.asm b/src/kernel/interact.asm
index a625f8e..42b8a6b 100644
--- a/src/kernel/interact.asm
+++ b/src/kernel/interact.asm
@@ -44,7 +44,7 @@ section .text
reloc: use32 ; by Napalm
mov [REBASE(stack32_ptr)], esp ; save 32bit stack pointer
sidt [REBASE(idt32_ptr)] ; save 32bit idt pointer
- ;sgdt [REBASE(gdt32_ptr)] ; save 32bit gdt pointer
+ sgdt [REBASE(gdt32_ptr)] ; save 32bit gdt pointer
lgdt [REBASE(gdt16_ptr)] ; load 16bit gdt pointer
lea esi, [esp+0x24] ; set position of intnum on 32bit stack
lodsd ; read intnum into eax
@@ -144,8 +144,8 @@ section .text
dd 0x00000000 ; table base address
gdt32_ptr: ; GDT table pointer for 32bit access
- dw 0x0018 ; table limit (size)
- dd 0x00130000 ; table base address
+ dw 0x0000 ; table limit (size)
+ dd 0x00000000 ; table base address
idt16_ptr: ; IDT table pointer for 16bit access
dw 0x03FF ; table limit (size)
@@ -192,4 +192,4 @@ section .text
dw gdt16_ptr - gdt16_base - 1 ; table limit (size)
dd gdt16_base ; table base address
- int32_end: ; end marker (so we can copy the code) \ No newline at end of file
+ int32_end: ; end marker (so we can copy the code)
diff --git a/src/kernel/io/io.c b/src/kernel/io/io.c
index 5da4e0e..e699ae0 100644
--- a/src/kernel/io/io.c
+++ b/src/kernel/io/io.c
@@ -3,19 +3,19 @@
#include "io.h"
uint8_t receive_b(uint16_t port) {
- unsigned char value;
+ uint8_t value;
asm volatile ("inb %1, %0" : "=a"(value) : "Nd"(port));
return value;
}
uint16_t receive_w(uint16_t port) {
- unsigned char value;
- asm volatile("inb %1,%0" : "=a"(value) : "Nd"(port)); // TODO: Fix inw error
+ uint16_t value;
+ asm volatile("inw %1, %0" : "=a"(value) : "Nd"(port));
return value;
}
uint32_t receive_l(uint16_t port) {
- unsigned char value;
+ uint32_t value;
asm volatile ("inb %1, %0" : "=a"(value) : "Nd"(port));
return value;
}
diff --git a/src/kernel/kernel.c b/src/kernel/kernel.c
index cdad8dd..35dd4fd 100644
--- a/src/kernel/kernel.c
+++ b/src/kernel/kernel.c
@@ -24,7 +24,7 @@ void init() {
void kernel_main(void) {
init();
- // vesa_draw_string("This is a testing text!");
+ vesa_draw_string("This is a testing text!");
if (vesa_available) {
serial_write("Loaded VESA!\n");
diff --git a/src/kernel/paging/kheap.h b/src/kernel/paging/kheap.h
index a1d946c..a2254be 100644
--- a/src/kernel/paging/kheap.h
+++ b/src/kernel/paging/kheap.h
@@ -105,8 +105,4 @@ uint32_t kmalloc_ap(uint32_t sz, uint32_t *phys);
*/
uint32_t kmalloc(uint32_t sz);
-/**
- General deallocation function.
-**/
-
#endif