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6 Linux
2007.9
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1Bootloadervivi2Linux3Linux4Linux5
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6.1 Bootloader vivi
1Bootloader2Bootloader 3Bootloader4vivi Bootloader5vivi
Bootloader6vivi
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Bootloader///kernel//Cramfs
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6.1.1 BootloaderBootloaderPCBIOS Bootloader Bootloader
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Bootloader
Bootloader
Boot parameters
Kernel
Root filesystem
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Bootloader0x0000,0000BootloaderBootloaderBootloaderBootloaderviviRedBootU-Boot
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Bootloader1viviviviMiziBootloaderARM92RedBoot RedBoot(Red
Hat)/3U-Boot U-BootUniversal
BootloaderDENXBootloaderARMPowerPCMIPS
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6.1.2 Bootloader BootloaderBootloader
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1BootloadingAutonomousBootloader RAM BootloaderBootloader
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2DownloadingBootloaderBootloaderRAM BootloaderFLASH
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BootloaderBootloader RedBootRedBoot>vivi Bootloader
vivi>
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2Downloading
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RedBootBootloaderRedBootU-BootBootloaderRedBoot3RedBoot
Linux
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6.1.3 BootloaderBootloader11CPU5(1) Bootloader 2 kernel
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CPU /cache
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(2)2RAM 2 RAM RAM24KB 1MBRAM
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(3)2RAM(4)sp1MB RAM ()(5)2C Bootloader stage2
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Bootloader2RAM
stage1stage2RAM1MB
...
...
...
Flash
ramdisk
...(blank)
...(blank)
stage21MB
stage11MB
RAM
...(blank)
spstage_end-4
stage2_start
0x0001,0000(64KB)
0x0000,0400(1KB)
0x0000,0000
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22C5(1) I/O
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(2)(memory map) RAM RAM(3)kernelflashRAM
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(4)kernelLinux 2.4.x (tagged list)ATAG_COREATAG_NONE Linux Boot
Loader ATAG_COREATAG_MEMATAG_NONE
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(5)BootloaderLinux kernel1)CPUR00R1IDR2RAM (
linux/arch/arm/tools/mach-types)2)CPU CPUSVC(IRQsFIQs)3) MMU
CacheMMU Cache Cache
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6.1.4 vivi BootloaderviviMiziBootloaderARM9viviviviPress Return
to start the Linux now, any other key for viviLinux OSvivivivi
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viviviviarchDocumentationdriversinitincludelibscriptstestutil103001archarchitectureCPUviviCPUS3C2410x
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2Documentationvivi3driversMTDxmodemymodem4includeS3C2410S3C2410
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5initmain.cversion.cvivimain.cvivi6libtime.cheap.c7scriptsmenuconfigconfigue
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8CVSCVS
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vivi
vivi1vivi/arch/s3c2410/head.s2mainLDRSP,DW_STACK_STARTMOVFP,#0MOVA2,#0BLMAINMOVPC,#FLASH_BASE3vivi/init/main.c
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6.1.5 vivi Bootloadervivi viviPress Return to start the Linux
now, any other key for viviEntervivi5
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1load---FlashRAMload [| ] media_typeFlashRAMpartnameaddr
sizex|y|zxxmodemyymodemzzmodemvivixmodem
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1vivi>load flash kernel xzImageflashxmodem2vivi>load flash
0x80000 0xc0000 x
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2part---MTDMTDpart showpart del part resetpart saveflash
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part add partnameoffsetsizeflagJFFS2LOCKEDBONFS
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3param--- param showparam set boot_delay n(s)param set
xmodem_initial_timeout m (s)
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4boot---boot [media_type] [| <
size>]media_typeflashRAMpartnameaddrsizebootkernelkernel
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1vivi>boot nand 0x80000nand flash0x800000xc00002vivi>boot
nor 0x80000
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5flash---flash
flashflash erase [| ]flashflash erase 0x80000 0xc0000
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vivi
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6.1.6 viviviviviviviviviviviviviviLinux
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Linux:
cygwinfriendly-arm crosstool kernel vivi
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1vivi/Makefile11CROSS_COMPILE=/opt/host/armv4l/bin/armv4l-unknown-linux-CROSS_COMPILE=
arm-linux-gcc CROSS_COMPILE =/friendly-arm/
crosstool/arm-linux/gcc-2.95.3-glibc-2.2.3/bin/arm-linux-
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2ARM_GCC_LIBS=/opt/host/armv4l/bin/gcc-lib/armv4l-unknown-linux/2.95.2ARM_GCC_LIBS=ARM_GCC_LIBS=
/friendly-arm/
crosstool/arm-linux/gcc-2.95.3-glibc-2.2.3/lib/gcc-lib/arm-linux/2.95.3
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3 LIBC_INCLUDE_DIR=includeLIBC_INCLUDE_DIR= /friendly-arm/
crosstool/arm-linux/gcc-2.95.3-glibc-2.2.3/include
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2Linux
LinuxLINUX_INCLUDE_DIR=/opt/host/armv4l/includeLINUX_INCLUDE_DIR=LINUX_INCLUDE_DIR=/friendly-arm/kernel/include
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2vivi/friendly-arm/vivi/include/platform/smdk2410.hsmdk2410.hI/OUARTvivi
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3Nor Flashvivi/arch/s3c2410/smdk.c1 Nor flashNor flashNand
flashSDRAM Nor flash12MBbootloaderNand flash SDRAMNor flash
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vivi/arch/s3c2410/smdk.cNor flash#ifdef
CONFIG_S3C2410_AMD_BOOTmtd_partition_t default_mtd_partitions[] =
{{name:"vivi",offset:0,size:0x00020000,flag:0},
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{name:"param",offset:0x00020000,size:0x00010000,flag:0},
{name:"kernel",offset:0x00030000,size:0x000C0000,flag:0},
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{name:"root",offset:0x00100000,size:0x00140000,flag:MF_BONFS}};#endif
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2Nand flashLinuxNor flashLinux
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#ifdef CONFIG_S3C2410_NAND_BOOTChar Linux_cmd[ ] = "noinitrd
root=/dev/bon/2 init =/linuxrc console=tty1console=ttyS0";#elseChar
Linux_cmd[ ] = "noinitrd root=/dev/mtdblock/3init =/linuxrc
console=tty1 console=ttyS0";
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noinitrdramdiskrootMTDinitconsolettyS0tty0LCDLinuxKernel/Documentatio/kernel-parameters.txt
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4load flash jNandJTAGSDRAM0x30000000load
flashjvivikernelroot3X-Modem Y-ModemJ-Modem3
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1 vivi/include/priv_data.h#define X_MODEM1#define
Y_MODEM2#define Z_MODEM3#define JTAG_D4
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2 vivi/lib/load_file.cJ-Modemmodem_is(const char *mt){} else if
(strncmp("z", mt, 1) == 0) return Z_MODEM; else return
UNKNOWN_MODEM;}
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modem_is(const char *mt){} else if (strncmp("z", mt, 1) == 0)
return Z_MODEM; else if (strncmp(J", mt, 1) == 0) return JTAG_D;
else return UNKNOWN_MODEM;}SDRAM
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vivivivimenuconfigmakemenuconfigvivi
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vivivivi makecleanmake make cleanvivivivi.bin
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viviJTAGviviNor flash0x00000---0x20000vivi
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6.2 Linux
1Linux2Linux3Linux4Linux
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6.2.1 LinuxLinux
LinuxLinuxLinuxLinuxmakefile
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Linux
Linux1270011000120MBLinuxarchdriversfsincludeinitipckernellibmmnet1archarchARMPCi386
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bootkernellibmmmath-emuFPU2drivers
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3fsLinux4includelinux5initmain.cversion.c
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6ipc7kernelarch/***/kernel8lib9mmarch/***/mm
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10net11DocumentationscriptsdependMakefiledependMakefile
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6.2.2
Linux/my-arm/kernel$KERNELCODE=/my-arm/kernel/my-arm/kernel---
MakefileLinuxvmlinuxMakefileMakefile
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1ARCH :=$(shell uname m|sed e s/i.86/i.386ARCH
:=arm2CROSS_COMPILE = CROSS_COMPILE = /friendly-arm/
crosstool/arm-linux/gcc-2.95.3-glibc-2.2.3/bin/arm-linux-
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3TOPDIRTOPDIR := $(shell bin/pwd) TOPDIR :=
$(/my-arm/kernel)4exportINSTALL_MOD_PATHINSTALL_MOD_PATH = /root
INSTALL_MOD_PATH = /my-arm/kernel/arch/arm/root
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arch/arm1Makefileifeq($(CONFIG_ARCH_S3C2410),y)TEXTADDR=0xC0008000MACHINE=s3c2410endifTEXTADDRimage.ram0xC00080000xC000000032MB
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2config.inconfig.inmenuconfigconfig.in2.4.18S3C2410x1CONFIG_ARCH_S3C2410if[$CONFIG_ARCH_S3C2410=y];thencomment
S3C2410 Implementationdep_bool SMDK (MERI TECH
BOARD)CONFIG_S3C2410_SMCK $CONFIG_ARCH_S3C2410fi
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2:if[$CONFIG_FOOTBRIDGE_HOST=y o\$CONFIG_ARCH_SA1100=y];
then$CONFIG_ARCH_S3C410=y o \
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arch/arm/boot1Makefileifeq($(CONFIG_ARCH_S3C2410),y)ZTEXTADDR=0x30008000ZRELADDR=0x30208000endifZRELADDRZTEXTADDRBoorloader0RAM
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2compressed/Makefileifeq($(CONFIG_ARCH_S3C2410),y)OBJS+=
head-s3c2410.oendifhead-s3c2410.o3compressed/head-s3c2410.S
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#include #include #include
.section".start", #alloc, #execinstr
__S3C2410_start:
bicr2, pc, #0x1fadd r3, r2, #0x4000@ 16 kb is quite
enough...1:ldr r0, [r2], #32teqr2, r3bne1bmcrp15, 0, r0, c7, c10,
4@drain WBmcrp15, 0, r0, c7, c7, 0@flush I&D caches
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#if 0@ disabling MMU and cachesmrcp15, 0, r0, c1, c0, 0@ read
control registerbicr0, r0, #0x05@ disable D cache and MMUbic r0,
r0, #1000@ disable I cachemcr p15, 0, r0, c1, c0, 0#endif
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movr0, #0x002000001:subsr0, r0, #1bne1b
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6.2.3 LinuxLinuxmakeconfigmakemenuconfigmakexconfig
makeoldconfig make config makemenuconfig makexconfig
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130.configinclude/linux/autoconf.h.configautoconf.h.config.config.old
makedepLinux
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makecleanmakezImagemakemodulesmakemodules_installmake cleanmake
zImage,/arch/arm/bootMake modulesMake modules_install
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6. 3 hello.cLinuxvim#includeintmain( ){printf(Hello
world!\n);}
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Linuxhello.c arm-linux-gcc o hello hello.cARMhello.exe vivi
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P252101214
