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Increased TX buffer size

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This commit is contained in:
Thomas Oltmann 2025-07-09 18:49:38 +02:00
parent 43a0d9017c
commit be2d14de91
1 changed files with 44 additions and 15 deletions
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59
lboot.S
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@ -22,6 +22,7 @@
.code16 .code16
.set PACKET_SIZE, 512 .set PACKET_SIZE, 512
.set TX_BUF_SIZE, 4096
.macro pxe_call, opcode .macro pxe_call, opcode
push %eax push %eax
@ -38,7 +39,8 @@
lcall *pxe_api lcall *pxe_api
add $6, %sp add $6, %sp
or %ss:(%bx), %ax mov %ss:(%bx), %cx
or %cx, %ax
jnz _pcerr jnz _pcerr
pop %edx pop %edx
@ -76,6 +78,18 @@ _start: cli
call print call print
call enable_a20 call enable_a20
.set PXE_GET_CACHED_INFO, 0x0071
push $0
push %cs
push $tx_buf
push $TX_BUF_SIZE
push $2
push $0
pxe_call PXE_GET_CACHED_INFO
add $12, %sp
mov tx_buf+20, %eax
mov %eax, server_ip
mov $msg_unreal, %si mov $msg_unreal, %si
call print call print
call unreal call unreal
@ -92,18 +106,6 @@ _start: cli
call print call print
call paging call paging
.set PXE_GET_CACHED_INFO, 0x0071
push $0
push %cs
push $tx_buf
push $PACKET_SIZE
push $2
push $0
pxe_call PXE_GET_CACHED_INFO
add $12, %sp
mov tx_buf+20, %eax
mov %eax, server_ip
mov $msg_read, %si mov $msg_read, %si
call print call print
mov $fn_initrd, %esi mov $fn_initrd, %esi
@ -432,8 +434,33 @@ long:
hang: hlt hang: hlt
jmp hang jmp hang
_pcerr: mov $msg_pcerr, %si _pcerr: push %cx
mov $msg_pcerr, %si
call print call print
pop %cx
push %cx
xor %bx, %bx
mov %ch, %bl
mov hex_digits(%bx), %bl
mov %bx, tx_buf
mov $tx_buf, %si
call print
pop %cx
push %cx
xor %bx, %bx
mov %cl, %bl
mov hex_digits(%bx), %bl
mov %bx, tx_buf
mov $tx_buf, %si
call print
pop %cx
jmp hang jmp hang
// gdt16: Protected mode / Unreal mode 16-bit GDT // gdt16: Protected mode / Unreal mode 16-bit GDT
@ -513,7 +540,7 @@ pml4_ptr: .long 0
// Points to the end of the memory map // Points to the end of the memory map
memmap_end: .short 0 memmap_end: .short 0
tx_buf: .space PACKET_SIZE tx_buf: .space TX_BUF_SIZE
.code64 .code64
// trampo64: Trampoline function to load long-mode segments // trampo64: Trampoline function to load long-mode segments
@ -579,6 +606,8 @@ type_table: .byte 0
// - Sanitizing the memmap // - Sanitizing the memmap
// - Parsing a config file // - Parsing a config file
hex_digits: .ascii "0123456789ABCDEF"
.section .data.bootboot .section .data.bootboot
bootboot: .ascii "BOOT" bootboot: .ascii "BOOT"
bb_size: .long 128 bb_size: .long 128