Changeset f66c203d in mainline for kernel/arch/amd64/src


Ignore:
Timestamp:
2012-07-24T16:55:15Z (13 years ago)
Author:
Martin Decky <martin@…>
Branches:
lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
Children:
8f4f444
Parents:
c828803
Message:

explicitly load default BIOS IDT for real-mode VESA BIOS access (GRUB 2.00 setups an empty IDT for bootstrap)
always use an empty IDT during bootstrap (for consistency)
make sure the interrupts are disabled during bootstrap
make sure correct GDT is set after returning from VESA BIOS

Location:
kernel/arch/amd64/src/boot
Files:
3 edited

Legend:

Unmodified
Added
Removed

  • kernel/arch/amd64/src/boot/multiboot.S

    rc828803 rf66c203d  
    7676
    7777multiboot_image_start:
     78        cli
    7879        cld
    7980       
    … …  
    8182        movl $START_STACK, %esp
    8283       
    83         /* Initialize Global Descriptor Table register */
     84        /*
     85         * Initialize Global Descriptor Table and
     86         * Interrupt Descriptor Table registers
     87         */
    8488        lgdtl bootstrap_gdtr
     89        lidtl bootstrap_idtr
    8590       
    8691        /* Kernel data + stack */
    … …  
    645650.section K_DATA_START, "aw", @progbits
    646651
     652.global bootstrap_idtr
     653bootstrap_idtr:
     654        .word 0
     655        .long 0
     656
    647657.global bootstrap_gdtr
    648658bootstrap_gdtr:

  • kernel/arch/amd64/src/boot/multiboot2.S

    rc828803 rf66c203d  
    116116
    117117multiboot2_image_start:
     118        cli
    118119        cld
    119120       
    … …  
    121122        movl $START_STACK, %esp
    122123       
    123         /* Initialize Global Descriptor Table register */
     124        /*
     125         * Initialize Global Descriptor Table and
     126         * Interrupt Descriptor Table registers
     127         */
    124128        lgdtl bootstrap_gdtr
     129        lidtl bootstrap_idtr
    125130       
    126131        /* Kernel data + stack */

  • kernel/arch/amd64/src/boot/vesa_ret.inc

    rc828803 rf66c203d  
    11.code32
    22vesa_init_protected:
     3        cli
    34        cld
    45       
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