163 lines
3.5 KiB
NASM
163 lines
3.5 KiB
NASM
; ***************************************************************************
|
|
; copyright : (C) 2025 by Martin Preuss
|
|
; email : martin@libchipcard.de
|
|
;
|
|
; ***************************************************************************
|
|
; * This file is part of the project "AqHome". *
|
|
; * Please see toplevel file COPYING of that project for license details. *
|
|
; ***************************************************************************
|
|
|
|
|
|
; ===========================================================================
|
|
; defs
|
|
|
|
|
|
|
|
|
|
; ===========================================================================
|
|
; code segment
|
|
|
|
.cseg
|
|
|
|
; ---------------------------------------------------------------------------
|
|
; @routine NET_Buffer_Init @global
|
|
;
|
|
; @clobbers R16, R17, X
|
|
|
|
NET_Buffer_Init:
|
|
ldi xl, LOW(netBuffers)
|
|
ldi xh, HIGH(netBuffers)
|
|
m_fixedbuf_init NET_BUFFERS_SIZE, NET_BUFFERS_NUM
|
|
ret
|
|
; @end
|
|
|
|
|
|
|
|
; ---------------------------------------------------------------------------
|
|
; @routine NET_Buffer_Alloc @global
|
|
;
|
|
; @return CFLAG set if buffer available, cleared otherwise
|
|
; @return r16 buffer num
|
|
; @return X pointer to start of buffer
|
|
; @clobbers R16, R17, X
|
|
|
|
NET_Buffer_Alloc:
|
|
push r15
|
|
in r15, SREG
|
|
cli
|
|
rcall NET_Buffer_Alloc_noIrq
|
|
brcc NET_Buffer_Alloc_error
|
|
out SREG, r15
|
|
pop r15
|
|
sec
|
|
ret
|
|
NET_Buffer_Alloc_error:
|
|
out SREG, r15
|
|
pop r15
|
|
clc
|
|
ret
|
|
|
|
NET_Buffer_Alloc_noIrq:
|
|
ldi xl, LOW(netBuffers)
|
|
ldi xh, HIGH(netBuffers)
|
|
m_fixedbuf_reserve NET_BUFFERS_SIZE, NET_BUFFERS_NUM
|
|
brcc NET_Buffer_Alloc_end
|
|
ldi r17, (1<<NET_IFACE_BUFFER_INUSE_BIT)
|
|
st X, r17
|
|
NET_Buffer_Alloc_end:
|
|
ret
|
|
; @end
|
|
|
|
|
|
|
|
; ---------------------------------------------------------------------------
|
|
; @routine NET_Buffer_ReleaseByAddr @global
|
|
;
|
|
; @param X pointer to start of buffer
|
|
; @clobbers R16
|
|
|
|
NET_Buffer_ReleaseByAddr:
|
|
push r15
|
|
in r15, SREG
|
|
cli
|
|
m_fixedbuf_release
|
|
out SREG, r15
|
|
pop r15
|
|
ret
|
|
; @end
|
|
|
|
|
|
|
|
; ---------------------------------------------------------------------------
|
|
; @routine NET_Buffer_ReleaseByNum @global
|
|
;
|
|
; @param r16 buffer number
|
|
; @clobbers X (R16)
|
|
|
|
NET_Buffer_ReleaseByNum:
|
|
push r15
|
|
in r15, SREG
|
|
cli
|
|
rcall NET_Buffer_Locate ; (R16, X)
|
|
brcc NET_Buffer_ReleaseByNum_end
|
|
rcall NET_Buffer_ReleaseByAddr ; (R16)
|
|
NET_Buffer_ReleaseByNum_end:
|
|
out SREG, r15
|
|
pop r15
|
|
ret
|
|
; @end
|
|
|
|
|
|
|
|
; ---------------------------------------------------------------------------
|
|
; @routine NET_Buffer_Locate
|
|
;
|
|
; Get position of a given buffer.
|
|
;
|
|
; CAVE: need to change this routine if UART_HW_FIXEDBUFFERS_SIZE is changed!
|
|
;
|
|
; @return CFLAG set if okay, cleared on error
|
|
; @return X points to start of buffer with the given num
|
|
; @param r16 buffer num (0-max)
|
|
; @clobbers r17
|
|
|
|
NET_Buffer_Locate:
|
|
cpi r16, NET_BUFFERS_NUM
|
|
brcc NET_Buffer_Locate_end ; out of range
|
|
mov xh, r16 ; * 256
|
|
clr xl
|
|
lsr xh ; *128
|
|
ror xl
|
|
lsr xh ; *64
|
|
ror xl
|
|
lsr xh ; *32
|
|
ror xl
|
|
ldi r17, LOW(netBuffers)
|
|
add xl, r17
|
|
ldi r17, HIGH(netBuffers)
|
|
adc xh, r17
|
|
sec
|
|
NET_Buffer_Locate_end:
|
|
ret
|
|
; @end
|
|
|
|
|
|
|
|
; ---------------------------------------------------------------------------
|
|
; @routine NET_Buffer_CountUsed
|
|
;
|
|
; @return r16 number of buffers in use
|
|
; @param X pointer to start of buffers
|
|
; @param %0 constant maxBytes per buffer (including statusbyte in front)
|
|
; @param %1 constant maxBuffers
|
|
; @clobbers r16, r17, r18, X
|
|
|
|
NET_Buffer_CountUsed:
|
|
ldi xl, LOW(netBuffers)
|
|
ldi xh, HIGH(netBuffers)
|
|
m_fixedbuf_count_used NET_BUFFERS_SIZE, NET_BUFFERS_NUM
|
|
ret
|
|
; @end
|
|
|
|
|