/* config.h - Compile-time configuration for sbc_harness * * Copyright (C) 2024 Luke T. Shumaker * SPDX-License-Identifier: AGPL-3.0-or-later */ #ifndef _CONFIG_H_ #define _CONFIG_H_ /* W5500 **********************************************************************/ /** * How many W5500 chips we have. */ #define CONFIG_W5500_NUM 1 /* 9P *************************************************************************/ #define CONFIG_9P_PORT 564 /** * This max-msg-size is sized so that a Twrite message can return * 8KiB of data. * * This is the same as the default in Plan 9 4e's lib9p; it has the * comment that "24" is "ample room for Twrite/Rread header * (iounit)". In fact, the Twrite header is only 23 bytes * ("size[4] Twrite[1] tag[2] fid[4] offset[8] count[4]") and the * Rread header is even shorter at 11 bytes ("size[4] Rread[1] * tag[2] count[4]"), so "24" appears to be the size of the Twrite * header rounded up to a nice round number. * * In older versions of 9P ("9P1"), the max message size was * defined as part of the protocol specification rather than * negotiated. In Plan 9 1e it was (8*1024)+128, and was bumped to * (8*1024)+160 in 2e and 3e. */ #define CONFIG_9P_MAX_MSG_SIZE ((4*1024)+24) /** * Maximum host-data-structure size. A message may be larger in * unmarshaled-host-structures than marshaled-net-bytes due to (1) * struct padding, (2) nul-terminator byes for strings. */ #define CONFIG_9P_MAX_HOSTMSG_SIZE CONFIG_9P_MAX_MSG_SIZE+16 #define CONFIG_9P_MAX_FIDS 16 #define CONFIG_9P_MAX_REQS 2 #define CONFIG_9P_MAX_ERR_SIZE 128 /* 128 is what Plan 9 4e uses */ /* COROUTINE ******************************************************************/ #define CONFIG_COROUTINE_DEFAULT_STACK_SIZE 512 #define CONFIG_COROUTINE_MEASURE_STACK 1 /* bool */ #define CONFIG_COROUTINE_PROTECT_STACK 1 /* bool */ #define CONFIG_COROUTINE_DEBUG 0 /* bool */ #define CONFIG_COROUTINE_VALGRIND 0 /* bool */ #define _CONFIG_9P_NUM_SOCKS 7 #define CONFIG_COROUTINE_NUM ( \ 1 /* usb_common */ + \ 1 /* usb_keyboard */ + \ CONFIG_W5500_NUM /* irq handler */ + \ _CONFIG_9P_NUM_SOCKS /* 9P accept()+read() */ + \ (CONFIG_9P_MAX_REQS*_CONFIG_9P_NUM_SOCKS) /* 9P work+write() */ ) #endif /* _CONFIG_H_ */