漫谈Linux龙芯及其软件开发

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1、软件硬件操作系统CPUDOS，WindowsLinux，UnixX86，IA64MIPS，ARMX86LinuxDOSWindowsFreeBSDX86IA64PowerPC龙芯Linuxint main(int argc,char*argv)/*Setting constants:*/const int constant_yes=1;const int constant_true=1;const int constant_no=0;const int constant_false=0;struct emul*emuls;char*diskimages=NULL;int n_diskimage

2、s=0;int n_emuls;int i;progname=argv0;/*Initialize all emulator subsystems:*/console_init();cpu_init();device_init();machine_init();timer_init();useremul_init();emuls=malloc(sizeof(struct emul*);if(emuls=NULL)fprintf(stderr,out of memoryn);exit(1);/*Allocate space for a simple emul setup:*/n_emuls=1;

3、emuls0=emul_new(NULL);if(emuls0=NULL)fprintf(stderr,out of memoryn);exit(1);get_cmd_args(argc,argv,emuls0,&diskimages,&n_diskimages);if(!skip_srandom_call)struct timeval tv;gettimeofday(&tv,NULL);srandom(tv.tv_sec getpid()tv.tv_usec);/*Print startup message:*/debug(GXemul);debug(Copyright(C)2003-200

4、6 Anders Gavaren);debug(Read the source code and/or documentation for other Copyright messages.nn);if(emuls0-machines0-machine_type=MACHINE_NONE)n_emuls-;else for(i=0;imachines0,diskimagesi);/*Simple initialization,from command line arguments:*/if(n_emuls 0)/*Make sure that there are no configuratio

5、n files as well:*/for(i=1;iargc;i+)if(argvi0=)fprintf(stderr,You can either start one emulation with one machine directly from the commandnline,or start one or more emulations using configuration files.Not both.n);exit(1);/*Initialize one emul:*/emul_simple_init(emuls0);/*Initialize emulations from

6、config files:*/for(i=1;iargc;i+)if(argvi0=)char tmpstr50;char*s=argvi+1;if(strlen(s)=0&i+1 argc&argvi+10!=)i+;s=argvi;n_emuls+;emuls=realloc(emuls,sizeof(struct emul*)*n_emuls);if(emuls=NULL)fprintf(stderr,out of memoryn);exit(1);/*Always allow slave xterms when using multiple emulations:*/console_a

7、llow_slaves(1);/*Destroy the temporary emuls0,since it will be overwritten:*/if(n_emuls=1)emul_destroy(emuls0);emulsn_emuls-1=emul_create_from_configfile(s);snprintf(tmpstr,sizeof(tmpstr),emul%i,n_emuls-1);if(n_emuls=0)fprintf(stderr,No emulations defined.Maybe you forgot to use-E xx and/or-e yy,to

8、specifynthe machine type.For example:nn%s-e 3max-d disk.imgnn to boot an emulated DECstation 5000/200 with a disk image.n,progname);exit(1);device_set_exit_on_error(0);console_warn_if_slaves_are_needed(1);/*Run all emulations:*/emul_run(emuls,n_emuls);/*Deinitialize everything:*/console_deinit();for

9、(i=0;imachines0-machine_type=MACHINE_NONE)n_emuls-;else for(i=0;imachines0,diskimagesi);if(n_emuls 0)for(i=1;iargc;i+)if(argvi0=)fprintf(stderr,You can either start one emulation with one machine directly from the commandnline,or start one or more emulations using configuration files.Not both.n);exi

10、t(1);emul_simple_init(emuls0);for(i=1;iargc;i+)if(argvi0=)char tmpstr50;char*s=argvi+1;if(strlen(s)=0&i+1 argc&argvi+10!=)i+;s=argvi;n_emuls+;emuls=realloc(emuls,sizeof(struct emul*)*n_emuls);if(emuls=NULL)fprintf(stderr,out of memoryn);exit(1);console_allow_slaves(1);if(n_emuls=1)emul_destroy(emuls

11、0);emulsn_emuls-1=emul_create_from_configfile(s);snprintf(tmpstr,sizeof(tmpstr),emul%i,n_emuls-1);if(n_emuls=0)fprintf(stderr,No emulations defined.Maybe you forgot to use-E xx and/or-e yy,to specifynthe machine type.For example:nn%s-e 3max-d disk.imgnn to boot an emulated DECstation 5000/200 with a

12、 disk image.n,progname);exit(1);device_set_exit_on_error(0);console_warn_if_slaves_are_needed(1);emul_run(emuls,n_emuls);console_deinit();for(i=0;imachines0-machine_type=MACHINE_NONE)n_emuls-;else for(i=0;imachines0,diskimagesi);if(n_emuls 0)for(i=1;iargc;i+)if(argvi0=)fprintf(stderr,You can either

13、start one emulation with one machine directly from the commandnline,or start one or more emulations using configuration files.Not both.n);exit(1);emul_simple_init(emuls0);for(i=1;iargc;i+)if(argvi0=)char tmpstr50;char*s=argvi+1;if(strlen(s)=0&i+1 argc&argvi+10!=)i+;s=argvi;n_emuls+;emuls=realloc(emu

14、ls,sizeof(struct emul*)*n_emuls);if(emuls=NULL)fprintf(stderr,out of memoryn);exit(1);console_allow_slaves(1);if(n_emuls=1)emul_destroy(emuls0);emulsn_emuls-1=emul_create_from_configfile(s);snprintf(tmpstr,sizeof(tmpstr),emul%i,n_emuls-1);if(n_emuls=0)fprintf(stderr,No emulations defined.Maybe you f

15、orgot to use-E xx and/or-e yy,to specifynthe machine type.For example:nn%s-e 3max-d disk.imgnn to boot an emulated DECstation 5000/200 with a disk image.n,progname);exit(1);device_set_exit_on_error(0);console_warn_if_slaves_are_needed(1);emul_run(emuls,n_emuls);console_deinit();for(i=0;imachines0-ma

16、chine_type=MACHINE_NONE)n_emuls-;else for(i=0;imachines0,diskimagesi);if(n_emuls 0)for(i=1;iargc;i+)if(argvi0=)fprintf(stderr,You can either start one emulation with one machine directly from the commandnline,or start one or more emulations using configuration files.Not both.n);exit(1);emul_simple_i

17、nit(emuls0);for(i=1;iargc;i+)if(argvi0=)if(strlen(s)=0&i+1 argc&argvi+10!=)i+;s=argvi;n_emuls+;emuls=realloc(emuls,sizeof(struct emul*)*n_emuls);if(emuls=NULL)fprintf(stderr,out of memoryn);exit(1);console_allow_slaves(1);if(n_emuls=1)emul_destroy(emuls0);emulsn_emuls-1=emul_create_from_configfile(s

18、);snprintf(tmpstr,sizeof(tmpstr),emul%i,n_emuls-1);if(n_emuls=0)fprintf(stderr,No emulations defined.Maybe you forgot to use-E xx and/or-e yy,to specifynthe machine type.For example:nn%s-e 3max-d disk.imgnn to boot an emulated DECstation 5000/200 with a disk image.n,progname);exit(1);device_set_exit

19、_on_error(0);console_warn_if_slaves_are_needed(1);emul_run(emuls,n_emuls);console_deinit();for(i=0;imachines0-machine_type=MACHINE_NONE)n_emuls-;else for(i=0;imachines0,diskimagesi);if(n_emuls 0)for(i=1;iargc;i+)if(argvi0=)fprintf(stderr,You can either start one emulation with one machine directly f

20、rom the commandnline,or start one or more emulations using configuration files.Not both.n);exit(1);emul_simple_init(emuls0);for(i=1;iargc;i+)if(argvi0=)if(strlen(s)=0&i+1 argc&argvi+10!=)i+;s=argvi;n_emuls+;emuls=realloc(emuls,sizeof(struct emul*)*n_emuls);if(emuls=NULL)fprintf(stderr,out of memoryn

21、);exit(1);console_allow_slaves(1);if(n_emuls=1)emul_destroy(emuls0);emulsn_emuls-1=emul_create_from_configfile(s);snprintf(tmpstr,sizeof(tmpstr),emul%i,n_emuls-1);if(n_emuls=0)fprintf(stderr,No emulations defined.Maybe you forgot to use-E xx and/or-e yy,to specifynthe machine type.For example:nn%s-e

22、 3max-d disk.imgnn to boot an emulated DECstation 5000/200 with a disk image.n,progname);exit(1);device_set_exit_on_error(0);console_warn_if_slaves_are_needed(1);emul_run(emuls,n_emuls);console_deinit();for(i=0;imachines0-machine_type=MACHINE_NONE)n_emuls-;else for(i=0;imachines0,diskimagesi);if(n_e

23、muls 0)for(i=1;iargc;i+)if(argvi0=)exit(1);emul_simple_init(emuls0);for(i=1;iargc;i+)if(argvi0=)if(strlen(s)=0&i+1 argc&argvi+10!=)i+;s=argvi;n_emuls+;emuls=realloc(emuls,sizeof(struct emul*)*n_emuls);console_allow_slaves(1);if(n_emuls=1)emul_destroy(emuls0);emulsn_emuls-1=emul_create_from_configfil

24、e(s);if(n_emuls=0)exit(1);device_set_exit_on_error(0);console_warn_if_slaves_are_needed(1);emul_run(emuls,n_emuls);console_deinit();for(i=0;imachines0-machine_type=MACHINE_NONE)n_emuls-;else for(i=0;imachines0,diskimagesi);if(n_emuls 0)for(i=1;iargc;i+)if(argvi0=)exit(1);emul_simple_init(emuls0);for

25、(i=1;iargc;i+)if(argvi0=)if(strlen(s)=0&i+1 argc&argvi+10!=)i+;s=argvi;n_emuls+;emuls=realloc(emuls,sizeof(struct emul*)*n_emuls);console_allow_slaves(1);if(n_emuls=1)emul_destroy(emuls0);emulsn_emuls-1=emul_create_from_configfile(s);if(n_emuls=0)exit(1);device_set_exit_on_error(0);console_warn_if_s

26、laves_are_needed(1);emul_run(emuls,n_emuls);console_deinit();for(i=0;imachines0-machine_type=MACHINE_NONE)n_emuls-;else for(i=0;imachines0,diskimagesi);if(n_emuls 0)emul_simple_init(emuls0);for(i=1;iargc;i+)if(argvi0=)if(strlen(s)=0&i+1 argc&argvi+10!=)i+;s=argvi;n_emuls+;emuls=realloc(emuls,sizeof(

27、struct emul*)*n_emuls);console_allow_slaves(1);if(n_emuls=1)emul_destroy(emuls0);emulsn_emuls-1=emul_create_from_configfile(s);emul_run(emuls,n_emuls);console_deinit();for(i=0;imachines0-machine_type=MACHINE_NONE)n_emuls-;else for(i=0;imachines0,diskimagesi);if(n_emuls 0)emul_simple_init(emuls0);for

28、(i=1;iargc;i+)if(argvi0=)if(strlen(s)=0&i+1 argc&argvi+10!=)i+;s=argvi;n_emuls+;emuls=realloc(emuls,sizeof(struct emul*)*n_emuls);console_allow_slaves(1);if(n_emuls=1)emul_destroy(emuls0);emulsn_emuls-1=emul_create_from_configfile(s);emul_run(emuls,n_emuls);console_deinit();for(i=0;in_emuls;i+)emul_

29、destroy(emulsi);return 0;int main(int argc,char*argv)console_init();cpu_init();device_init();machine_init();timer_init();useremul_init();emuls=malloc(sizeof(struct emul*);emuls0=emul_new(NULL);get_cmd_args(argc,argv,emuls0,&diskimages,&n_diskimages);for(i=0;imachines0,diskimagesi);if(n_emuls 0)emul_simple_init(emuls0);emul_run(emuls,n_emuls);console_deinit();for(i=0;imachines0,diskimagesi);/给机器添加磁盘 emul_simple_init(emuls0);/模拟机器初始化 emul_run(emuls,n_emuls);/运行模拟机器 console_deinit();/控制台销毁 emul_destroy(emulsi);/模拟机器销毁 return 0;/返回是不是很简单？