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6c01c614
编写于
2月 24, 2021
作者:
彭
彭睿扬
提交者:
GitHub
2月 24, 2021
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@@ -3,47 +3,47 @@ Cunix kernel
# Versions
`0.362s-boot`
:
`Boot`
read
`loader`
from
`boot-device`
, then it jumps to it.
Loader doesn't load anything, it just enable long-mode and paging.
Loader defines temporary page table at
`0x70000`
(0x0000:0x7000),
it uses
`2MB`
page to make 0-12 MB memory to
`0x0000 - 0xc0000`
.
    
`Boot`
read
`loader`
from
`boot-device`
, then it jumps to it.
    
Loader doesn't load anything, it just enable long-mode and paging.
    
Loader defines temporary page table at
`0x70000`
(0x0000:0x7000),
    
it uses
`2MB`
page to make 0-12 MB memory to
`0x0000 - 0xc0000`
.
`0.385s-boot`
:
rebuild
`boot`
and
`loader`
.
    
rebuild
`boot`
and
`loader`
.
`0.391s-boot`
:
`loader`
forgot open A20 line, so
`0.385`
and
`0.362`
just can
use 1MB memory like real-mode.
    
`loader`
forgot open A20 line, so
`0.385`
and
`0.362`
just can
    
use 1MB memory like real-mode.
`0.432s-boot`
:
make directory
`include/`
, and add segment.inc, but it doesn't work. :-)
    
make directory
`include/`
, and add segment.inc, but it doesn't work. :-)
`0.451s-boot`
:
`boot`
can load 8 sectors (4KB) of loader (not 1 sector).
    
`boot`
can load 8 sectors (4KB) of loader (not 1 sector).
`0.466s-boot`
:
rebuild
`boot`
    
rebuild
`boot`
`0.487s-boot`
:
`loader`
let FS can access 4GB memory in real-mode. because
`loader`
loaded GDT and load a data-segment to fs, then disable
protect-mode.
    
`loader`
let FS can access 4GB memory in real-mode. because
    
`loader`
loaded GDT and load a data-segment to fs, then disable
    
protect-mode.
`0.484s-boot`
:
let
`readdisk.inc`
smaller, but we just can use CHS or LBA, not both.
    
let
`readdisk.inc`
smaller, but we just can use CHS or LBA, not both.
`0.509s-kernel`
:
load kernel to 0x8200-0x9200 for 4KB, kernel.asm display 'K' to screen.
    
load kernel to 0x8200-0x9200 for 4KB, kernel.asm display 'K' to screen.
`0.556s-int`
:
init IDT at 0x0000-0x1000, and set all handler at ignore_int, but it do nothing.
    
init IDT at 0x0000-0x1000, and set all handler at ignore_int, but it do nothing.
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