at91bootstrap设置
请问，at91bootstrap setting中的这些定义值，是固定的还是设置的，依据是什么？它与U bootr设置有关系吗？* ******************************************************************* */
/* BootStrap Settings */
/* */
/* ******************************************************************* */
#define IMG_ADDRESS 0x20000 /* Image Address in NandFlash */
#define IMG_SIZE 0x30000 /* Image Size in NandFlash */
#define MACH_TYPE 0x44B /* AT91SAM9260-EK */
#define JUMP_ADDR 0x23F00000 /* Final Jump Address */
SMC相关设置是怎么算出来的，它在这时进行设置的目的是什么
/* ******************************************************************** */
/* SMC Chip Select 3 Timings for NandFlash for MASTER_CLOCK = 100000000.*/
/* Micron 16bits 256Mb for MASTER_CLOCK = 100000000. */
/* Please refer to SMC section in AT91SAM9261 datasheet to learn how */
/* to generate these values. */
/* ******************************************************************** */
/*#define AT91C_SM_NWE_SETUP (0 << 0)
#define AT91C_SM_NCS_WR_SETUP (0 << 8)
#define AT91C_SM_NRD_SETUP (0 << 16)
#define AT91C_SM_NCS_RD_SETUP (0 << 24)
#define AT91C_SM_NWE_PULSE (4 << 0)
#define AT91C_SM_NCS_WR_PULSE (6 << 8)
#define AT91C_SM_NRD_PULSE (3 << 16)
#define AT91C_SM_NCS_RD_PULSE (5 << 24)
#define AT91C_SM_NWE_CYCLE (6 << 0)
#define AT91C_SM_NRD_CYCLE (5 << 16)*/
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