Image_cfg.hÖеØÖ·¶¨ÒåµÄÒ»µã˵Ã÷£º
ÓкܶàµØÖ·Öаüº¬ PA\\CA\\UAº¬Òå·Ö±ðÊÇ£¬PA´ú±íDRAMµÄÎïÀíµØÖ·£¬CA´ú±í¾¹ýMMU Ó³ÉäºóµÄÐéÄâµØÖ·£¬UA´ú±í¾¹ýMMUµÄ»ù´¡ÉÏÔö¼ÓÁË CacheºóµÄµØÖ·¡£
Source ÎļþÖж¨ÒåÁË BootLoader µÄÈë¿Ú StartUp£¬ÔÚ Startup.s ÎļþÖС£ ×ʼ£¬ÏÈÁ˽â
Startup.sÒýÓõÄһЩͷÎļþºÍ¿â¡£ INCLUDE kxarm.h //arm ¼Ü¹¹Ïà¹Ø¶¨Òå
INCLUDE
register_map.i nc
INCLUDE image_cfg.inc ;ÄÚ´æµØÖ·Ó³ÉäÏà¹Øºê¶¨Òå
IMPORT Ini tClockCONforBL IMPORT InitCache TEXTAREA
INCLUDE oemaddrtab_cfg.i nc
IMPORT mai nLEAF_ENTRY StartUp ;LEAF_ENTRY ´ú±í³ÌÐò´Ó¸Ã´¦¿ªÊ¼Ö´ÐÐ b
ResetHandler ; Ìøתµ½ ResetHandler
±êºÅ´¦Ö´ÐÐ
ResetHa ndler
ÖÐÖ÷Òª¹¤×÷ÓУº
1¡¢¼ì²éÆô¶¯Ä£Ê½£¬Èç¹ûMMUÒѾʹÄÜ£¬²»Ö´ÐкóÐø²Ù×÷£¬Ö±½ÓÌøתµ½VirtualStart Ö´ÐÐ(²½Öè8)£¬·ñÔò³õʼ»¯ MMU
Check boot mode mrc p15, 0, rO, c1, cO, 0 tst
r0, #1
bne VirtualStart
; If the MMUis already enabled, we don't n eed to i nitialize H/W. (n ormal boot : STEPLDR-BL2-EBOOT)
;If the MMU is disabled, continue
to i ntialize
H/W. (EBOOT. nb0)
2¡¢ ¹ØÖжÏ
3¡¢ ÉèÖÃÒì³£ÏòÁ¿Î»Öõ½ 0 4¡¢ ³õʼ»¯Cache 5¡¢ ³õʼ»¯TZPC
6¡¢ ³õʼ»¯ÓÃÓÚ NAND Flash µÄGPIO ¿Ú 7¡¢ ³õʼ»¯MMUµØÖ·¿Õ¼äÖØÐÂÓ³Éä 8¡¢ VirtualStart ±êºÅ´¦£¬²Á³ý BootLoader RAM, ²Á³ý Bootloader ¶ÑÕ»
9¡¢ ³õʼ»¯¶ÑÕ»
10¡¢ Ìøתµ½ma inº¯Êý´¦Ö´ÐÐ
´¦
1¡¢Ö®ºóº¯Êý»áµ÷×¼µ½ mai n->BootloaderMai n() ²¢²»ÐèÒªÐ޸ģ¬¸Ãº¯ÊýÔÚ
º¯ÊýÖÐÖ´ÐУ¬BootloaderMain º¯Êý
platform'com mon \\src\\com mon\\boot\\blcom mon\\Blcom mon.c 2¡¢ ËäÈ»Õⲿ·ÖÊÇ common²¿·ÖµÄ´úÂ룬µ«Êǵ÷Óõ½ ÖеÄBlcommo n.h ÖÐÔ¼¶¨Á˽ӿڶ¨Ò壬¾ßÌå½Ó¿ÚÔÚ ½«È«¾Ö±äÁ¿°áÒƵ½ RAMÖÐÈ¥
// relocate globals to RAM if (!KernelRelocate (pTOC)) {
// spin forever
HALT (BLERR_KERNELRELOCATE); } ROMHDR*const
pTOCÊÇÒ»¸öÌØÊâµÄ½á¹¹ÌåÖ¸Õ룬ͨ¹ý
ÖÐʵÏÖ
ma in .c Öеĺ¯Êý£¬ÕâÏ൱ÓÚ common ma in .c ÖÐʵÏÖ¡£
pTOCÎÒÃǾͿÉÒÔÖªµÀ¿½±´ÄÄЩ´ú
ÂëºÍÊý¾Ý¶Îµ½RAMÖÐÈ¥¡£ 3¡¢ ½ÓÏÂÀ´µ÷Óà OEMDebugl nit
º¯Êý£¬ÓÃÓÚ³õʼ»¯µ÷ÊԶ˿ڣ¬Ò»°ã¶¼ÊÇ´®¿Ú£¬¸Ãº¯ÊýÖ´ÐÐ
´òÓ¡µ÷ÊÔÐÅÏ¢ÁË¡£
¹ýºó£¬ÎÒÃǾͿÉÒÔʹÓà OEMWriteDebugStri ng if (!OEMDebugI nit ()) {
// spin forever HALT (BLERR_DBGINIT); }
¸Ãº¯ÊýµÄʵÏÖÔÚ eboot\\mai n.c ÖÐ BOOL OEMDebugI nit(void) {
//¸øº¯ÊýÖ¸Õ븳ֵ£¬ÓÃÓÚ
blcommonµ÷ÓÃ
g_pOEMVerifyMemory = OEMVerifyMemory; // Verify RAM. g_pOEMMultiBINNotify = OEMMultiBINNotify;
//´®¿Ú³õʼ»¯£¬¸Ãº¯ÊýÓë OAL¹«Óà OEMI ni tDebugSerial(); return(TRUE); }
OEMI ni tDebugSerial
²»ÔÚma in .c ÖÐʵÏÖ£¬½Ó¿Ú¶¨ÒåÔÚ
ÖÐ
PLATFORM\\COMMON\\SRC\\SOC\\S5PV21O_SEC_V1\\OAL\\INC\\dbgserial.h 4¡¢ µ÷ÓÃOEMPIatformlnit if (!OEMPlatformI nit ()) {
// spin forever HALT (BLERR_PLATINIT);
£¬³õʼ»¯Æ½Ì¨É豸£¬°üÀ¨Ê±ÖÓ¡¢É豸Çý¶¯¡¢´«ÊäµÈµÈ¡£
}
¸Ãº¯ÊýʵÏÖÔÚ eboot\\main.c 1) ³õʼ»¯BSP²ÎÊý
ÖУ¬Ö÷ÒªÁ÷³ÌÈçÏ£º
OALArgsI nit((BSP_ARGS *) IMAGE_SHARE_ARGS_UA_START); 2) ³õʼ»¯ÖÐ¶Ï In itializeI nterrupt(), platform\\smdkv210\\src\\bootloader\\bl1_uart ÏÖ
3) Èç¹û¶¨ÒåÁË SDMMC_BOOTºê£¬Ôò³õʼ»¯ SDHC£¬Îª´ÓSD¿¨Æô¶¯×ö×¼±¸
SBnNIC_BOOT i¡ê ( ISBKC_I¸ØTO)
OALNSGffRUE, ffE^T CERROR: HSHNIC_Init Failed Vr\\n*)]L SpirJ ar ever 0 :
}
·¾¶Ï In terrupt.c ÎļþÖÐʵ
else
{
OAIHS^CrKUE, (TEXT (\I
#i¡ê
1
SDHC_KEAD (AISSTARTSECTOE, SECTOEOFAIS, (laî®32)(ft^AddressInfoSector));
i t (g_AddrsE^InfoSec t&r. dwSigitature ! = 0M53c5(15d)
{
g_AddreEsIn¡êoSector. dwSi^nature - 0x53cEd5d; e_AddrslnfoSector dwEvotim^geStartgEutmr = D: g_AddrsEs!n¡êoSectetr. dwBc*tImagsT*talSeetftr = 0; €_Addre5 slnfoSec t or JwFl^shlinagfStartSect or - D;
^_Addres^In¡êoSector. dwFlashlmageTotalSectsr ¶þ 0£º OAJJ11SG(TRVE> ffEXT (*###? Address Info Sector is not fus?d!' £»
}
#endi f
}
#endlf
4)
³õʼ»¯FLASHÉ豸
BP_I nit((LPBYTE)BINFS_RAM_START,
³õʼ»¯FLASH,ΪºóÆÚÄÚºËÏÂÔØÖÁ FLASH×ö×¼±¸
BINFS_RAM_LENGTH, NULL, NULL, NULL)
·¾¶ÏµÄ
¸Ãº¯ÊýÔÚ platform\\smdkv210\\src\\bootloader\\bootpart_sdmmc Bootpart.cpp
ÖÐʵÏÖ£¬BP_Init ÖÐͨ¹ýFMD_Init ³õʼ»¯Ò»¿é¶ùÄÚ´æ¡£³õʼ»¯ FLASH
ºó£¬BINFS_RAM_START Ö¸ÏòµÄλÖÃÓÃÀ´´æ·Å MBRÐÅÏ¢£¬BINFS_RAM_LENGTH ´ú±í³õʼ »¯ÄÚ´æµÄ´óС¡£ ³õʼ»¯³É¹¦ºó£¬½« g_bBootMediaExist
È«¾Ö±äÁ¿ÖÃΪ TRUE£¬±íʾÒýµ¼Ã½ÌåÒѾÕÒµ½
(FLASH)£¬È»ºó½«FLASHÏà¹ØÐÅÏ¢´æÈëÈ«¾Ö±äÁ¿£¬ÈçÏ£º
I I
kExist = TRUE£»
#i¡êndef SDMMC.BOOT
// Get fl^sh info
if (!FMD_(Jetlnft>(XE_FL?hln¡êo))
{ _
OALNISGQ, (TEXT (^FMB
** failed. VrXn*))):
SFIN_FOEE£¤ER;
} _
// EBOOT global v&rial>l?s to ths NAHD flash memory sp&c _NUM OF BLOCKS = ^Flashlnfs dwM^Blccks:
_BYnS FER_EL0CK = g_KLaEhIn¡êo. dwByUsF&rElock£º _SECTOES_rER_BIICK = gjFlaKhlnfa wSactor^F er Block; _BYTES PER SECTOR - 5_Fla5hInfo. wD^taBytesFerSector;
#enai¡ê
}
5)
Content)ÐÅÏ¢£¬TOCÊÇÓÃÓÚÃèÊö OS Image
»ñÈ¡TOC( Table of µÄ½á¹¹Ì壬ͨ³£ÔÚFLASH ÖÐ
µÄÒ»¶Îblock Öд洢£¬Æô¶¯Ê±£¬EBOOTÐèÒª»ñÈ¡OS ImageÏà¹ØµÄÐÅÏ¢À´Æô¶¯²Ù×÷ϵͳ£¬ »ñÈ¡µÄÐÅÏ¢Ö÷ÒªÓÐÆðʼµØÖ·¡¢³¤¶È¡¢ÐéÄâµØÖ·µÈ¡£ if (TOC_Read() == FALSE) // {
// use default setti ngs TOC_I nit(); TOC_Write();
¶ÁÈ¡TOCÐÅÏ¢£¬Èç¹û²»³É¹¦ÔòʹÓÃģʽÉèÖÃ
}
TOC½á¹¹¶¨ÒåÈçÏ£º typedef struct _TOC { DWORD
dwSig nature; //TOC
µÄÑéÖ¤Âë
// How to boot the images in this TOC.
// This could be moved into the image descriptor if desired, // but I prefer to con serve space. BOOT_CFG BootCfg; //Image // Array of Image Descriptors.
IMAGE_DESCRIPTOR id[MAX_TOC_DESCRIPTORS]; //Image CHAININFO
chainlnfo; //
¶à¸ö image bin
ÃèÊö×é
ʱµÄÁ´½ÓÐÅÏ¢
Òýµ¼ÅäÖã¬ÍøÂçÉ豸µØÖ·
} TOC, *PTOC; // NAND_SECTOR_SIZE ImageÃèÊö×é½á¹¹¶¨ÒåÈçÏ£º
// Note: Our NAND uses H/W ECC, so no checksum needed. typedef struct¡¹M AGE_DESCRIPTOR { // File versio n info DWORD dwVersio n; DWORD dwSig nature;
// ±àÒë°æ±¾ºÅ
// e.g: \
UCHAR ucString[MAX PATH]; // e.g: \DWORD dwImageType; // Image DWORD dwTtlSectors; // Image DWORD dwLoadAddress; // image DWORD dwJumpAddress;
// image
ÀàÐÍ£¬nk.nb0 ÊÇ 0x04 ÎļþÓõ½µÄÉÈÇø×ÜÊý ¼ÓÔØʱµÄÐéÄâµØÖ· ¼ÓÔØÍêºóµÄÌøתµØÖ· //Image
¶ÎÃèÊö£¬ÆðʼÉÈÇøºÅ£¬ÉÈÇøÊý
SG_SECTOR sgList[MAX_SG_SECTORS];
Ä¿µÈ
ULONG dwStoreOffset; // byte offset - not needed - remove!
} IMAGE_DESCRIPTOR, *PIMAGE_DESCRIPTOR;
´úÂëÖаüº¬´ÓFLASHºÍSD¿¨Á½ÖÖÒýµ¼·½Ê½£¬´Ë´¦ÏȹØ×¢´Ó FLASHÒýµ¼µÄÁ÷³Ì¡£ //»ñÈ¡TOCÐÅÏ¢ TOC_Read()
->FMD_ReadSector(TOC_SECTOR, (PUCHAR)g_pTOC, &si, 1) //¸üÐÂÈ«¾Ö±äÁ¿ºÍÒýµ¼Ïà¹Ø²ÎÊý£¬ÈçÏ£º
// update our boot confi
g^_pBootCfg = & gjTQC-^BootCfe£» // c^che i m&ga typa
EBootÆô¶¯Á÷³Ì·ÖÎö
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