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Improve coding style of PCI device enumerator 

The arguments of all of the statements are now indented and one or two
comments have been rewritten partially, improving readability.
This commit is contained in:
Eric-Paul Ickhorn 2024-07-23 00:51:04 +02:00
parent 4d9b1e390d
commit 1285994cbf
Signed by: epickh
GPG Key ID: 1358818BAA38B104
1 changed files with 170 additions and 170 deletions
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20
i386/loader/src-asm/drivers/pci/enumerate.asm
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@ -22,13 +22,14 @@ pci_device_exists:
; Bus Number
mov al, [esi + 5]
; Device Number
shl eax, 5 ; Make space for device number
; Make space for device number
shl eax, 5
mov dl, [esi + 4]
and dl, 0x1f
or al, dl
shl eax, 11
.io_task:
.input_output:
mov dx, PCI_CONFIG_ADDRESS_PORT
out dx, eax
@ -139,7 +140,8 @@ pci_get_device_class_at_address:
; Bus Number
mov al, [ebp - 2]
; Device Number
shl eax, 5 ; Make space for device number
; Make space for device number
shl eax, 5
mov dl, [ebp - 4]
and dl, 0x1f
or al, dl
@ -192,6 +194,7 @@ pci_enumerate_bus:
; [esi]: Device-in-bus Index
; [esi + 4]: Number of existing devices
; [esi + 8]: Bus number
; [esi + 12]:
mov [esi], dword 0
mov [esi + 4], dword 0
mov eax, [ebp - 8]
@ -227,7 +230,6 @@ pci_enumerate_bus:
mov dl, ah
xor ah, ah
push ebp
mov ebp, esp
push ax
@ -248,14 +250,10 @@ pci_enumerate_bus:
mov esp, ebp
pop ebp
mov eax, [esi + 4]
inc eax
mov [esi + 4], eax
mov ebx, [ebp - 4]
.no_device:
mov ecx, [esi]
inc ecx
mov [esi], ecx
inc dword [esi]
jmp .device_loop
.epilog:
@ -277,6 +275,8 @@ pci_enumerate_bus:
; (0 to eliminate limit)
; 1. Ptr32 Pointer to PCI driver area of 65536 bytes
; [NEAREST TO EBP]
; Returns:
; eax: Number of devices read
pci_enumerate:
push dword esi
sub esp, 64