lwipopts.h

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/*  If changes are made to this file, please update the defined
    values at the bottom of common/include/tcpip.h too. */

#ifndef __LWIPOPTS_H__
#define __LWIPOPTS_H__
 
#define LWIP_TIMEVAL_PRIVATE 0
 
/* ---------- Thread options ---------- */
#define DEFAULT_THREAD_STACKSIZE    0x1000

#define DEFAULT_THREAD_PRIO     0x58

#define TCPIP_THREAD_STACKSIZE      DEFAULT_THREAD_STACKSIZE

#define TCPIP_THREAD_PRIO       DEFAULT_THREAD_PRIO
 
/*
   ------------------------------------
   ---------- Memory options ----------
   ------------------------------------
*/
#define MEM_LIBC_MALLOC     1
 
/* MEM_ALIGNMENT: must equal the alignment libc's malloc returns,
   because pbuf_alloc(PBUF_RAM) computes
     payload = LWIP_MEM_ALIGN(p + SIZEOF_STRUCT_PBUF + offset)
   inside an allocation sized assuming p is already MEM_ALIGNMENT-
   aligned. If MEM_ALIGNMENT > newlib's alignment the payload pointer
   overruns the chunk and corrupts the next-chunk header on the
   freelist (TLB misses inside _malloc_r / _free_r).
 
   16 is the contract baked into the toolchain configuration. See
   newlib/newlib/configure.host:
 
       mips64r5900*)
           machine_dir=r5900
           newlib_cflags="${newlib_cflags} -DMALLOC_ALIGNMENT=16"
           ;;
 
   so for the mips64r5900el-ps2-elf target newlib is built with
   -DMALLOC_ALIGNMENT=16, which sets _mallocr.c's MALLOC_ALIGNMENT
   directly (overriding the SIZE_SZ-derived default of 8). 16 is also
   what samples/malloc_stress observes empirically.
 
   The historical value here was 64 with a comment about "the EE cache
   design" (SP193). That was over-cautious: PBUF_POOL pbufs (the only
   ones touched by IOP->EE DMA + cache invalidate) come from memp's
   static pools and are always 64-byte aligned regardless of
   MEM_ALIGNMENT; PBUF_RAM pbufs (TX, ARP, DNS, ...) only see DMA
   writeback, where misalignment harmlessly over-flushes extra cache
   lines. The IOP-side lwipopts has used MEM_ALIGNMENT=4 forever for
   the same reason. */
#define MEM_ALIGNMENT       16

/*  SP193: setting this too low may cause tcp_write() to fail when it tries to allocate from PBUF_RAM!
    Up to TCP_SND_BUF * 2 segments may be transmitted at once, thanks to Nagle and Delayed Ack. */
#define MEM_SIZE        (TCP_SND_BUF * 2)
 
/*
   ------------------------------------------------
   ---------- Internal Memory Pool Sizes ----------
   ------------------------------------------------
*/
#define MEMP_NUM_NETCONN       (MEMP_NUM_TCP_PCB+MEMP_NUM_UDP_PCB)

//SP193: should be at least ((TCP_WND/PBUF_POOL_BUFSIZE)+1). But that is too small to accommodate data not accepted by the application layer and multiple connections.
//NETMAN will also always have PBUFs reserved for incoming frames (currently 64).
#define PBUF_POOL_SIZE          128

#define MEMP_NUM_TCPIP_MSG_INPKT    50

//SP193: this should be around the size of MEM_SIZE (in PBUFs), to prevent transmissions from being potentially being dropped.
#define MEMP_NUM_TCPIP_MSG_API      50

#define MEMP_NUM_TCP_SEG        TCP_SND_QUEUELEN

#define LWIP_TCPIP_CORE_LOCKING     1

#define LWIP_TCPIP_CORE_LOCKING_INPUT   1
 
/*
   ---------------------------------
   ---------- TCP options ----------
   ---------------------------------
*/
/* TCP Maximum segment size. */
#define TCP_MSS                 1460
 
/* TCP sender buffer space (bytes). */
#define TCP_SND_BUF             (TCP_MSS*32)
 
/* TCP receive window. */
#define TCP_WND                 65535
 
/* ---------- DHCP options ---------- */
#ifndef PS2IP_DHCP
#define PS2IP_DHCP
#endif
#ifndef LWIP_DHCP
#define LWIP_DHCP       1
#endif
 
/* LWIP_DHCP_DOES_ACD_CHECK / LWIP_ACD left at upstream defaults (=1 when
 * LWIP_DHCP=1) so the RFC 5227 Address Conflict Detection probe runs on
 * any DHCP-offered IP. EE applications run on user home networks where
 * IP collisions are a real (if uncommon) failure mode; the few KB of
 * code and ~1-2 s extra DHCP-bind delay are worth the robustness. The
 * IOP lwIP build forces both off because ps2link runs in controlled
 * bench environments where the IRX size + tick savings matter more. */
 
/*
   ----------------------------------
   ---------- DNS options -----------
   ----------------------------------
*/
#ifndef PS2IP_DNS
#define PS2IP_DNS
#endif
#ifndef LWIP_DNS
#define LWIP_DNS    1
#endif
 
/* ---------- Statistics options ---------- */
#define LWIP_STATS  0
 
/*
   --------------------------------------
   ---------- Checksum options ----------
   --------------------------------------
*/
//Rely on the Ethernet checksums to reduce the number of checksum compuations. If you require any of these, re-enable them.
#define CHECKSUM_CHECK_IP   0

#define CHECKSUM_CHECK_UDP  0

#define CHECKSUM_CHECK_TCP  0

#define CHECKSUM_CHECK_ICMP 0

#define CHECKSUM_CHECK_ICMP6    0

#define LWIP_CHECKSUM_ON_COPY   1
 
/*
   ------------------------------------
   ---------- Socket options ----------
   ------------------------------------
*/
#define LWIP_POSIX_SOCKETS_IO_NAMES 0
 
/*
   ----------------------------------
   ---------- DNS options -----------
   ----------------------------------
*/
#define LWIP_DNS_SECURE 0
 
/*
   ------------------------------------------------
   ---------- Network Interfaces options ----------
   ------------------------------------------------
*/
#define LWIP_NETIF_TX_SINGLE_PBUF             1
 
#endif /* __LWIPOPTS_H__ */