Changeset 22cf454d in mainline for arch/ia32/src/boot/boot.S

Timestamp:

2006-05-05T10:32:21Z (19 years ago)

Author:

Jakub Vana <jakub.vana@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

e3c762cd

Parents:

bdc5c516

Message:

ia32 VESA FB support

File:

• arch/ia32/src/boot/boot.S (modified) (3 diffs)

arch/ia32/src/boot/boot.S

@@ -35 +35 @@
 #define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE)
 
+
+
+
+
+
+
+
+
 .section K_TEXT_START, "ax"
 
@@ -69 +77 @@
         pushl %ebx                                                      # save parameters from GRUB
         pushl %eax
+
+#ifdef CONFIG_FB
+        mov $vesa_init,%esi;
+        mov $VESA_INIT_SEGMENT<<4,%edi;
+        mov $e_vesa_init-vesa_init,%ecx;
+        cld;
+        rep movsb;
+
+        mov $VESA_INIT_SEGMENT<<4,%edi;
+        call *%edi;
+        mov %esi,KA2PA(vesa_ph_addr);
+        mov %di,KA2PA(vesa_height);
+        shr $16,%edi;
+        mov %di,KA2PA(vesa_width);
+        mov %bx,KA2PA(vesa_scanline);
+        shr $16,%ebx;
+        mov %bx,KA2PA(vesa_bpp);
+#endif  
         
         call map_kernel                                                 # map kernel and turn paging on
@@ -231 +257 @@
         ret
 
+#ifdef CONFIG_FB
+vesa_init:
+        jmp $selector(VESA_INIT_DES),$vesa_init_real-vesa_init;
+.code16
+vesa_init_real: 
+
+        mov %cr0,%eax;
+        and $~1,%eax;
+        mov %eax,%cr0;
+
+
+        jmp $VESA_INIT_SEGMENT,$vesa_init_real2-vesa_init;
+
+vesa_init_real2:        
+
+
+        mov %esp,%ebp;
+        mov %ss,%cx;
+        mov $VESA_INIT_SEGMENT,%bx;
+        mov %bx,%ss;
+        mov $0x0000fffc,%esp;
+        push %ds;
+        push %es;
+        push %fs;
+        push %gs;
+        push %ebp;
+        push %cx;
+
+        mov %bx,%ds;
+        mov %bx,%es;
+        mov %bx,%fs;
+        mov %bx,%gs;
+
+        
+        mov $vesa_idt-vesa_init,%ebx;
+        lidtl (%ebx);
+
+#define VESA_INFO_SIZE 1024
+
+#define VESA_MODE_LIST_PTR_OFFSET 14 
+#define VESA_MODE_WIDTH_OFFSET 18
+#define VESA_MODE_HEIGHT_OFFSET 20
+#define VESA_MODE_BPP_OFFSET 25
+#define VESA_MODE_SCANLINE_OFFSET 16
+#define VESA_MODE_PHADDR_OFFSET 40
+
+#define VESA_END_OF_MODES 0xffff 
+
+#define VESA_OK 0x4f 
+
+#define VESA_GET_INFO 0x4f00 
+#define VESA_GET_MODE_INFO 0x4f01
+#define VESA_SET_MODE 0x4f02
+
+#define CONFIG_VESA_BPP_a 255
+
+#if CONFIG_VESA_BPP==24
+#undef CONFIG_VESA_BPP_a
+#define CONFIG_VESA_BPP_a 32
+#endif
+
+
+        mov $VESA_GET_INFO,%ax;
+        mov $e_vesa_init-vesa_init,%di
+        push %di;
+        int $0x10;      
+        pop %di;
+        cmp $VESA_OK,%al;
+        jnz 0f;
+        mov 2+VESA_MODE_LIST_PTR_OFFSET(%di),%si;
+        mov %si,%gs;
+        mov VESA_MODE_LIST_PTR_OFFSET(%di),%si;
+
+        add $VESA_INFO_SIZE,%di;
+
+1:# Try next mode
+        mov %gs:(%si),%cx;
+        cmp $VESA_END_OF_MODES,%cx;
+        jz 0f;
+        inc %si;
+        inc %si;
+        push %cx;
+        push %di;
+        push %si;
+        mov $VESA_GET_MODE_INFO,%ax;
+        int $0x10;
+        pop %si;
+        pop %di;
+        pop %cx;
+        cmp $VESA_OK,%al;
+        jnz 0f;
+
+
+        mov $CONFIG_VESA_WIDTH,%ax;
+        cmp VESA_MODE_WIDTH_OFFSET(%di),%ax;
+        jnz 1b;
+        mov $CONFIG_VESA_HEIGHT,%ax;
+        cmp VESA_MODE_HEIGHT_OFFSET(%di),%ax;
+        jnz 1b;
+        mov $CONFIG_VESA_BPP,%al;
+        cmp VESA_MODE_BPP_OFFSET(%di),%al;
+        jz 2f;
+        mov $CONFIG_VESA_BPP_a,%al;
+        cmp VESA_MODE_BPP_OFFSET(%di),%al;
+        jnz 1b;
+
+2:
+
+        mov %cx,%bx;
+        or $0xC000,%bx;
+        push %di;
+        mov $VESA_SET_MODE,%ax;
+        int $0x10;
+        pop %di;
+        cmp $VESA_OK,%al;
+        jnz 0f;
+        
+        mov VESA_MODE_PHADDR_OFFSET(%di),%esi;
+        mov VESA_MODE_WIDTH_OFFSET(%di),%ax;
+        shl $16,%eax;
+        mov VESA_MODE_HEIGHT_OFFSET(%di),%ax;
+        mov VESA_MODE_BPP_OFFSET(%di),%bl;
+        xor %bh,%bh;
+        shl $16,%ebx;
+        mov VESA_MODE_SCANLINE_OFFSET(%di),%bx;
+        mov %eax,%edi; 
+        
+        
+
+8:      
+
+        mov %cr0,%eax;
+        or $1,%eax;
+        mov %eax,%cr0;
+
+        jmp 9f;
+9:
+
+        pop %cx;
+        pop %ebp;
+        pop %gs;
+        pop %fs;
+        pop %es;
+        pop %ds;
+        mov %cx,%ss;
+        mov %ebp,%esp;
+
+        ljmpl $KTEXT,$(vesa_init_protect-vesa_init+VESA_INIT_SEGMENT<<4);
+
+vesa_init_protect:      
+.code32
+        ret;
+
+0:      #Error no Prefered mode found
+
+        mov $0x111,%cx;
+        push %di;
+        push %cx;
+        mov $VESA_GET_MODE_INFO,%ax;
+        int $0x10;
+        pop %cx;
+        pop %di;
+        cmp $VESA_OK,%al;
+        jnz 1f;
+        jmp 2b;
+
+1:mov $0x0003,%ax;
+        int $0x10;
+        mov $0xffffffff,%edi; /* EGA text mode used, because of problems with VESA */
+        jmp 8;
+
+
+vesa_idt:
+.word 0x03ff
+.long 0
+.align 4
+e_vesa_init:
+#endif  
+
+
 
 .section K_DATA_START, "aw", @progbits
+
+
 
 .align 4096