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docs: documente ISA/AT buses I/O Port map

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d0p1 🏳️‍⚧️ 2023-07-13 13:44:00 +02:00
parent a9fec6e18c
commit 08a7d5c975
14 changed files with 277 additions and 32 deletions
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32
docs/config/Menu.txt
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@ -41,48 +41,58 @@ Timestamp: Updated yyyy/mm/dd
File: Introduction (docs/intro.txt)
Link: Source Code (https://github.com/d0p1s4m4/StupidOS)
File: Coding Style (docs/coding-style.txt)
File: Building (building.txt)
File: FAQ (docs/faq.txt)
Group: Kernel {
Group: Boot {
File: Introduction (kernel/intro.txt)
Group: boot {
File: feat.s (kernel/boot/feat.s)
File: head.s (kernel/boot/head.s)
} # Group: Boot
} # Group: boot
File: kernel.s (kernel/kernel.s)
File: gdt.s (kernel/gdt.s)
File: idt.s (kernel/idt.s)
File: pic.s (kernel/pic.s)
Group: Driver {
Group: dev {
File: serial.s (no auto-title, kernel/drivers/serial.s)
} # Group: Driver
Group: AT {
File: IBM PC/AT (kernel/dev/at/intro.txt)
File: cmos.s (kernel/dev/at/cmos.s)
File: pit.s (kernel/dev/at/pit.s)
File: serial.s (kernel/dev/at/serial.s)
} # Group: AT
} # Group: dev
Group: i18n {
File: msg_en.s (kernel/i18n/msg_en.s)
} # Group: i18n
File: kernel.s (kernel/kernel.s)
File: pmm.s (kernel/pmm.s)
Group: Sys {
Group: sys {
File: multiboot.inc (kernel/sys/multiboot.inc)
Group: I386 {
Group: i386 {
File: cpuid.inc (kernel/sys/i386/cpuid.inc)
File: mmu.inc (kernel/sys/i386/mmu.inc)
File: registers.inc (kernel/sys/i386/registers.inc)
} # Group: I386
} # Group: i386
} # Group: Sys
} # Group: sys
File: vm.inc (kernel/vm/vm.inc)
File: pmap.s (kernel/vm/pmap.s)
File: cpu.inc (kernel/cpu.inc)
} # Group: Kernel
Group: Lib {

4
kernel/Makefile
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@ -1,7 +1,9 @@
KERNEL = vmstupid
SRCS = boot/head.s \
kernel.s gdt.s pic.s isr.s idt.s \
lib/log.s drivers/serial.s
lib/log.s dev/at/serial.s \
i18n/msg_en.s \
base/console.s
INCS = sys/multiboot.inc \
sys/i386/cpuid.inc \
sys/i386/mmu.inc \

11
kernel/boot/head.s
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@ -30,7 +30,8 @@ align 4
section .multiboot.text
;; Function: entry
;;
;; Setup boot page table, map kernel to higher half
;; then jump to <entry_high>
;;
;; in:
;; EAX - Multiboot magic
@ -83,16 +84,20 @@ entry:
section .text
;; Function: entry_high
;; Invalidate page[0], setup stack then call <kmain>
entry_high:
;; unmap first 4MiB, since it's not needed anymore
mov dword [boot_page_dir], 0
invlpg [0]
;; Setup stack
extern stack_top
mov esp, stack_top
xor ebp, ebp
push edi
push esi
push esi ; multiboot struct
push edi ; multiboot magic
extern kmain
call kmain

25
kernel/boot/memory.s Normal file
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@ -0,0 +1,25 @@
extern kernel_start
extern kernel_end
extern kernel_size
pmm_check_page_free:
push ebp
mov ebp, esp
leave
ret
pmm_setup_from_multiboot_mmap:
push ebp
mov ebp, esp
push edi
push esi
push ebx
mov eax, [esi + mb_info.mmap_addr]
pop ebx
pop esi
pop edi
leave
ret

59
kernel/cpu.inc
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@ -1,3 +1,62 @@
;; File: cpu.inc
;; Structure: tss
;;
;; > 31 23 15 7 0
;; > +----------|----------+----------|----------+
;; > 0x64 | I/O map base | 00000000 0000000T |
;; > +----------|----------+----------|----------+
;; > 0x60 | 00000000 00000000 | LDT |
;; > +----------|----------+----------|----------+
;; > 0x5c | 00000000 00000000 | GS |
;; > +----------|----------+----------|----------+
;; > 0x58 | 00000000 00000000 | FS |
;; > +----------|----------+----------|----------+
;; > 0x54 | 00000000 00000000 | DS |
;; > +----------|----------+----------|----------+
;; > 0x50 | 00000000 00000000 | SS |
;; > +----------|----------+----------|----------+
;; > 0x4C | 00000000 00000000 | CS |
;; > +----------|----------+----------|----------+
;; > 0x48 | 00000000 00000000 | ES |
;; > +----------|----------+----------|----------+
;; > 0x44 | EDI |
;; > +----------|----------+----------|----------+
;; > 0x40 | ESI |
;; > +----------|----------+----------|----------+
;; > 0x3C | EBP |
;; > +----------|----------+----------|----------+
;; > 0x38 | ESP |
;; > +----------|----------+----------|----------+
;; > 0x34 | EBX |
;; > +----------|----------+----------|----------+
;; > 0x30 | EDX |
;; > +----------|----------+----------|----------+
;; > 0x2C | ECX |
;; > +----------|----------+----------|----------+
;; > 0x28 | EAX |
;; > +----------|----------+----------|----------+
;; > 0x24 | EFLAGS |
;; > +----------|----------+----------|----------+
;; > 0x20 | EIP |
;; > +----------|----------+----------|----------+
;; > 0x1C | CR3 |
;; > +----------|----------+----------|----------+
;; > 0x18 | 00000000 00000000 | SS2 |
;; > +----------|----------+----------|----------+
;; > 0x14 | ESP2 |
;; > +----------|----------+----------|----------+
;; > 0x10 | 00000000 00000000 | SS1 |
;; > +----------|----------+----------|----------+
;; > 0x0C | ESP1 |
;; > +----------|----------+----------|----------+
;; > 0x08 | 00000000 00000000 | SS0 |
;; > +----------|----------+----------|----------+
;; > 0x04 | ESP0 |
;; > +----------|----------+----------|----------+
;; > 0x00 | 00000000 00000000 | old TSS selector |
;; > +----------|----------+----------|----------+
struc tss
.link: resw 1
resw 1

72
kernel/dev/at/cmos.s Normal file
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@ -0,0 +1,72 @@
;; File: cmos.s
;; Real/Time Clock/CMOS RAM
;;
;; > +-------------+------------------------------+
;; > | 0x00 - 0x0D | *Real-time clock information |
;; > +-------------+------------------------------+
;; > | 0x0E | *Diagnostic status byte |
;; > +-------------+------------------------------+
;; > | 0x0F | *Shutdown status byte |
;; > +-------------+------------------------------+
;; > | 0x10 | Diskette drive type byte |
;; > +-------------+------------------------------+
;; > | 0x12 | Fixed disk type byte |
;; > +-------------+------------------------------+
;; > | 0x14 | Equipment byte |
;; > +-------------+------------------------------+
;; > | 0x15 | Low base memory byte |
;; > +-------------+------------------------------+
;; > | 0x16 | High base memory byte |
;; > +-------------+------------------------------+
;; > | 0x17 | Low expansion memory byte |
;; > +-------------+------------------------------+
;; > | 0x18 | High expansion memory byte |
;; > +-------------+------------------------------+
;; > | 0x19 | Disk C extended byte |
;; > +-------------+------------------------------+
;; > | 0x1A | Disk D extended byte |
;; > +-------------+------------------------------+
;; > | 0x2E - 0x2F | CMOS checksum |
;; > +-------------+------------------------------+
;; > | 0x30 | *Low expansion memory byte |
;; > +-------------+------------------------------+
;; > | 0x31 | *High expansion memory byte |
;; > +-------------+------------------------------+
;; > | 0x32 | *Date century byte |
;; > +-------------+------------------------------+
;; > | 0x33 | *Flags |
;; > +-------------+------------------------------+
CMOS_RTC equ 0x00
RTC_SECONDS equ 0x00
RTC_SECOND_ALRM equ 0x01
RTC_MINUTES equ 0x02
RTC_MINUTE_ALRM equ 0x03
RTC_HOURS equ 0x04
RTC_HOUR_ALRM equ 0x05
RTC_WEEKDAY equ 0x06
RTC_DATE_OF_MONTH equ 0x07
RTC_MONTH equ 0x08
RTC_YEAR equ 0x09
RTC_STATUS_REGA equ 0x0A
RTC_STATUS_REGB equ 0x0B
RTC_STATUS_REGC equ 0x0C
RTC_STATUS_REGD equ 0x0D
STATUS_REGA_UIP equ (1 << 7)
STATUS_REGB_PIE equ (1 << 6)
STATUS_REGB_AIE equ (1 << 5)
STATUS_REGB_UIE equ (1 << 4)
STATUS_REGB_SQWE equ (1 << 3)
STATUS_REGB_DM equ (1 << 2)
STATUS_REGB_24H equ (1 << 1)
STATUS_REGB_DSE equ (1 << 0)
CMOS_CENTURY equ 0x32

54
kernel/dev/at/intro.txt Normal file
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@ -0,0 +1,54 @@
File: IBM PC/AT
About: I/O Address Map
> +---------------+-------------------------+
> | 0x000 - 0x01F | DMA controller 1 |
> +---------------+-------------------------+
> | 0x020 - 0x03F | 8259A, Primary |
> +---------------+-------------------------+
> | 0x040 - 0x05F | Timer |
> +---------------+-------------------------+
> | 0x060 - 0x06F | Keyboard |
> +---------------+-------------------------+
> | 0x070 - 0x07F | CMOS |
> +---------------+-------------------------+
> | 0x080 - 0x09F | DMA page register |
> +---------------+-------------------------+
> | 0x0A0 - 0x0BF | 8259A, Secondary |
> +---------------+-------------------------+
> | 0x0C0 - 0x0DF | DMA controller 2 |
> +---------------+-------------------------+
> | 0x0F0 | Clear Math Coprocessor |
> +---------------+-------------------------+
> | 0x0F1 | Reset Math Coprocessor |
> +---------------+-------------------------+
> | 0x0F8 - 0x0FF | Math Coprocessor |
> +---------------+-------------------------+
> | 0x1F0 - 0x1F8 | Fixed Disk |
> +---------------+-------------------------+
> | 0x200 - 0x207 | Game I/O |
> +---------------+-------------------------+
> | 0x278 - 0x27F | Parallel printer port 2 |
> +---------------+-------------------------+
> | 0x2F8 - 0x2FF | Serial port 2 |
> +---------------+-------------------------+
> | 0x300 - 0x31F | Prototype card |
> +---------------+-------------------------+
> | 0x360 - 0x363 | PC Network (low) |
> +---------------+-------------------------+
> | 0x368 - 0x36B | PC Network (high) |
> +---------------+-------------------------+
> | 0x378 - 0x37F | Parallel printer port 1 |
> +---------------+-------------------------+
> | 0x380 - 0x38F | SDLC, bisynchronous 2 |
> +---------------+-------------------------+
> | 0x3B0 - 0x3BF | Monochrome Display |
> +---------------+-------------------------+
> | 0x3D0 - 0x3DF | Color Monitor Adapter |
> +---------------+-------------------------+
> | 0x3F0 - 0x3F7 | Diskette controller |
> +---------------+-------------------------+
> | 0x3F8 - 0x3FF | Serial port 1 |
> +---------------+-------------------------+

0
kernel/dev/at/kbd.S Normal file
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15
kernel/dev/at/pit.s Normal file
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@ -0,0 +1,15 @@
;; File: pit.s
;; Programmable Interval Timer (8253/8254)
PIT_CHAN_0 equ 0x40
PIT_CHAN_1 equ 0x41
PIT_CHAN_2 equ 0x42
PIT_CMD equ 0x43
CMD_CHANNEL_1 equ (0x1 << 6)
CMD_CHANNEL_2 equ (0x2 << 6)
CMD_READ_BACK equ (0x3 << 6)
CMD_ACCESS_LO equ (0x1 << 4)
CMD_ACCESS_HI equ (0x2 << 4)
CMD_ACCESS_LO_HI equ (0x3 << 4)

0
kernel/drivers/serial.s → kernel/dev/at/serial.s
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11
kernel/i18n/i18n.inc
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@ -1,10 +1,3 @@
struc lang_entry
.code: resb 2
.data: resd 1
.next: resd 1
endstruc
%include "i18n/lang.inc"
struc msg_table
.hello_world: resd 1
.cpu_exceptions: resd 32
endstruc
extern msg_en

10
kernel/i18n/lang.inc Normal file
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@ -0,0 +1,10 @@
struc lang_entry
.code: resb 2
.data: resd 1
.next: resd 1
endstruc
struc msg_table
.hello_world: resd 1
.cpu_exceptions: resd 32
endstruc

16
kernel/i18n/msg_en.s
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@ -1,22 +1,22 @@
; file: msg_en.s
; English strings
%include "i18n.inc"
%include "i18n/lang.inc"
.section rodata
section .rodata
global lang_en
lang_en:
istruc lang_entry
at lang_entry.code: db "en"
at lang_entry.data: dd msg_en
at lang_entry.next: dd 0
at lang_entry.code, db "en"
at lang_entry.data, dd msg_en
at lang_entry.next, dd 0
iend
global msg_en
msg_en:
istruc msg_table
at msg_table.hello_world: dd msg_hello_world
at msg_table.cpu_exceptions:
at msg_table.hello_world, dd msg_hello_world
at msg_table.cpu_exceptions,
dd msg_int_division_zero
dd msg_int_debug
dd msg_int_nmi

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kernel/intro.txt Normal file
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