sbc8260.h

AT91RM9200的完整启动代码：包括loader, boot及U-boot三部分均已编译通过！欢迎下载使用！

#define CFG_RCCR	0

/*
 * Initialize Memory Controller:
 *
 * Bank Bus	Machine PortSz	Device
 * ---- ---	------- ------	------
 *  0	60x	GPCM	32 bit	FLASH (SIMM - 4MB) *
 *  1	60x	GPCM	32 bit	FLASH (SIMM - Unused)
 *  2	60x	SDRAM	64 bit	SDRAM (DIMM - 16MB or 64MB)
 *  3	60x	SDRAM	64 bit	SDRAM (DIMM - Unused)
 *  4	Local	SDRAM	32 bit	SDRAM (on board - 4MB)
 *  5	60x	GPCM	 8 bit	EEPROM (8KB)
 *  6	60x	GPCM	 8 bit	FLASH  (on board - 2MB) *
 *  7	60x	GPCM	 8 bit	LEDs, switches
 *
 *  (*) This configuration requires the SBC8260 be configured
 *	so that *CS0 goes to the FLASH SIMM, and *CS6 goes to
 *	the on board FLASH. In other words, JP24 should have
 *	pins 1 and 2 jumpered and pins 3 and 4 jumpered.
 *
 */

/*-----------------------------------------------------------------------
 * BR0,BR1 - Base Register
 *     Ref: Section 10.3.1 on page 10-14
 * OR0,OR1 - Option Register
 *     Ref: Section 10.3.2 on page 10-18
 *-----------------------------------------------------------------------
 */

/* Bank 0,1 - FLASH SIMM
 *
 * This expects the FLASH SIMM to be connected to *CS0
 * It consists of 4 AM29F080B parts.
 *
 * Note: For the 4 MB SIMM, *CS1 is unused.
 */

/* BR0 is configured as follows:
 *
 *     - Base address of 0x40000000
 *     - 32 bit port size
 *     - Data errors checking is disabled
 *     - Read and write access
 *     - GPCM 60x bus
 *     - Access are handled by the memory controller according to MSEL
 *     - Not used for atomic operations
 *     - No data pipelining is done
 *     - Valid
 */
#define CFG_BR0_PRELIM	((CFG_FLASH0_BASE & BRx_BA_MSK) |\
			 BRx_PS_32			|\
			 BRx_MS_GPCM_P			|\
			 BRx_V)

/* OR0 is configured as follows:
 *
 *     - 4 MB
 *     - *BCTL0 is asserted upon access to the current memory bank
 *     - *CW / *WE are negated a quarter of a clock earlier
 *     - *CS is output at the same time as the address lines
 *     - Uses a clock cycle length of 5
 *     - *PSDVAL is generated internally by the memory controller
 *	 unless *GTA is asserted earlier externally.
 *     - Relaxed timing is generated by the GPCM for accesses
 *	 initiated to this memory region.
 *     - One idle clock is inserted between a read access from the
 *	 current bank and the next access.
 */
#define CFG_OR0_PRELIM	(MEG_TO_AM(CFG_FLASH0_SIZE)	|\
			 ORxG_CSNT			|\
			 ORxG_ACS_DIV1			|\
			 ORxG_SCY_5_CLK			|\
			 ORxG_TRLX			|\
			 ORxG_EHTR)

/*-----------------------------------------------------------------------
 * BR2,BR3 - Base Register
 *     Ref: Section 10.3.1 on page 10-14
 * OR2,OR3 - Option Register
 *     Ref: Section 10.3.2 on page 10-16
 *-----------------------------------------------------------------------
 */

/* Bank 2,3 - SDRAM DIMM
 *
 *     16MB DIMM: P/N
 *     64MB DIMM: P/N  1W-8864X8-4-P1-EST
 *
 * Note: *CS3 is unused for this DIMM
 */

/* With a 16 MB or 64 MB DIMM, the BR2 is configured as follows:
 *
 *     - Base address of 0x00000000
 *     - 64 bit port size (60x bus only)
 *     - Data errors checking is disabled
 *     - Read and write access
 *     - SDRAM 60x bus
 *     - Access are handled by the memory controller according to MSEL
 *     - Not used for atomic operations
 *     - No data pipelining is done
 *     - Valid
 */
#define CFG_BR2_PRELIM	((CFG_SDRAM0_BASE & BRx_BA_MSK) |\
			 BRx_PS_64			|\
			 BRx_MS_SDRAM_P			|\
			 BRx_V)

#define CFG_BR3_PRELIM	((CFG_SDRAM0_BASE & BRx_BA_MSK) |\
			 BRx_PS_64			|\
			 BRx_MS_SDRAM_P			|\
			 BRx_V)

/* With a 16 MB DIMM, the OR2 is configured as follows:
 *
 *     - 16 MB
 *     - 2 internal banks per device
 *     - Row start address bit is A9 with PSDMR[PBI] = 0
 *     - 11 row address lines
 *     - Back-to-back page mode
 *     - Internal bank interleaving within save device enabled
 */
#if (CFG_SDRAM0_SIZE == 16)
#define CFG_OR2_PRELIM	(MEG_TO_AM(CFG_SDRAM0_SIZE)	|\
			 ORxS_BPD_2			|\
			 ORxS_ROWST_PBI0_A9		|\
			 ORxS_NUMR_11)
#endif

/* With a 64 MB DIMM, the OR2 is configured as follows:
 *
 *     - 64 MB
 *     - 4 internal banks per device
 *     - Row start address bit is A8 with PSDMR[PBI] = 0
 *     - 12 row address lines
 *     - Back-to-back page mode
 *     - Internal bank interleaving within save device enabled
 */
#if (CFG_SDRAM0_SIZE == 64)
#define CFG_OR2_PRELIM	(MEG_TO_AM(CFG_SDRAM0_SIZE)	|\
			 ORxS_BPD_4			|\
			 ORxS_ROWST_PBI0_A8		|\
			 ORxS_NUMR_12)
#endif

/*-----------------------------------------------------------------------
 * PSDMR - 60x Bus SDRAM Mode Register
 *     Ref: Section 10.3.3 on page 10-21
 *-----------------------------------------------------------------------
 */

/* Address that the DIMM SPD memory lives at.
 */
#define SDRAM_SPD_ADDR 0x54

#if (CFG_SDRAM0_SIZE == 16)
/* With a 16 MB DIMM, the PSDMR is configured as follows:
 *
 *     - Bank Based Interleaving,
 *     - Refresh Enable,
 *     - Address Multiplexing where A5 is output on A14 pin
 *	 (A6 on A15, and so on),
 *     - use address pins A16-A18 as bank select,
 *     - A9 is output on SDA10 during an ACTIVATE command,
 *     - earliest timing for ACTIVATE command after REFRESH command is 7 clocks,
 *     - earliest timing for ACTIVATE or REFRESH command after PRECHARGE command
 *	 is 3 clocks,
 *     - earliest timing for READ/WRITE command after ACTIVATE command is
 *	 2 clocks,
 *     - earliest timing for PRECHARGE after last data was read is 1 clock,
 *     - earliest timing for PRECHARGE after last data was written is 1 clock,
 *     - CAS Latency is 2.
 */
#define CFG_PSDMR	(PSDMR_RFEN	      |\
			 PSDMR_SDAM_A14_IS_A5 |\
			 PSDMR_BSMA_A16_A18   |\
			 PSDMR_SDA10_PBI0_A9  |\
			 PSDMR_RFRC_7_CLK     |\
			 PSDMR_PRETOACT_3W    |\
			 PSDMR_ACTTORW_2W     |\
			 PSDMR_LDOTOPRE_1C    |\
			 PSDMR_WRC_1C	      |\
			 PSDMR_CL_2)
#endif

#if (CFG_SDRAM0_SIZE == 64)
/* With a 64 MB DIMM, the PSDMR is configured as follows:
 *
 *     - Bank Based Interleaving,
 *     - Refresh Enable,
 *     - Address Multiplexing where A5 is output on A14 pin
 *	 (A6 on A15, and so on),
 *     - use address pins A14-A16 as bank select,
 *     - A9 is output on SDA10 during an ACTIVATE command,
 *     - earliest timing for ACTIVATE command after REFRESH command is 7 clocks,
 *     - earliest timing for ACTIVATE or REFRESH command after PRECHARGE command
 *	 is 3 clocks,
 *     - earliest timing for READ/WRITE command after ACTIVATE command is
 *	 2 clocks,
 *     - earliest timing for PRECHARGE after last data was read is 1 clock,
 *     - earliest timing for PRECHARGE after last data was written is 1 clock,
 *     - CAS Latency is 2.
 */
#define CFG_PSDMR	(PSDMR_RFEN	      |\
			 PSDMR_SDAM_A14_IS_A5 |\
			 PSDMR_BSMA_A14_A16   |\
			 PSDMR_SDA10_PBI0_A9  |\
			 PSDMR_RFRC_7_CLK     |\
			 PSDMR_PRETOACT_3W    |\
			 PSDMR_ACTTORW_2W     |\
			 PSDMR_LDOTOPRE_1C    |\
			 PSDMR_WRC_1C	      |\
			 PSDMR_CL_2)
#endif

/*
 * Shoot for approximately 1MHz on the prescaler.
 */
#if (CONFIG_8260_CLKIN == (66 * 1000 * 1000))
#define CFG_MPTPR	MPTPR_PTP_DIV64
#elif (CONFIG_8260_CLKIN == (33 * 1000 * 1000))
#define CFG_MPTPR	MPTPR_PTP_DIV32
#else
#warning "Unconfigured bus clock freq: check CFG_MPTPR and CFG_PSRT are OK"
#define CFG_MPTPR	MPTPR_PTP_DIV32
#endif
#define CFG_PSRT	14


/* Bank 4 - On board SDRAM
 *
 * This is not implemented yet.
 */

/*-----------------------------------------------------------------------
 * BR6 - Base Register
 *     Ref: Section 10.3.1 on page 10-14
 * OR6 - Option Register
 *     Ref: Section 10.3.2 on page 10-18
 *-----------------------------------------------------------------------
 */

/* Bank 6 - On board FLASH
 *
 * This expects the on board FLASH SIMM to be connected to *CS6
 * It consists of 1 AM29F016A part.
 */
#if (defined(CFG_FLASH1_BASE) && defined(CFG_FLASH1_SIZE))

/* BR6 is configured as follows:
 *
 *     - Base address of 0x60000000
 *     - 8 bit port size
 *     - Data errors checking is disabled
 *     - Read and write access
 *     - GPCM 60x bus
 *     - Access are handled by the memory controller according to MSEL
 *     - Not used for atomic operations
 *     - No data pipelining is done
 *     - Valid
 */
#  define CFG_BR6_PRELIM  ((CFG_FLASH1_BASE & BRx_BA_MSK) |\
			   BRx_PS_8			  |\
			   BRx_MS_GPCM_P		  |\
			   BRx_V)

/* OR6 is configured as follows:
 *
 *     - 2 MB
 *     - *BCTL0 is asserted upon access to the current memory bank
 *     - *CW / *WE are negated a quarter of a clock earlier
 *     - *CS is output at the same time as the address lines
 *     - Uses a clock cycle length of 5
 *     - *PSDVAL is generated internally by the memory controller
 *	 unless *GTA is asserted earlier externally.
 *     - Relaxed timing is generated by the GPCM for accesses
 *	 initiated to this memory region.
 *     - One idle clock is inserted between a read access from the
 *	 current bank and the next access.
 */
#  define CFG_OR6_PRELIM  (MEG_TO_AM(CFG_FLASH1_SIZE)  |\
			   ORxG_CSNT		       |\
			   ORxG_ACS_DIV1	       |\
			   ORxG_SCY_5_CLK	       |\
			   ORxG_TRLX		       |\
			   ORxG_EHTR)
#endif /* (defined(CFG_FLASH1_BASE) && defined(CFG_FLASH1_SIZE)) */

/*-----------------------------------------------------------------------
 * BR7 - Base Register
 *     Ref: Section 10.3.1 on page 10-14
 * OR7 - Option Register
 *     Ref: Section 10.3.2 on page 10-18
 *-----------------------------------------------------------------------
 */

/* Bank 7 - LEDs and switches
 *
 *  LEDs     are at 0x00001 (write only)
 *  switches are at 0x00001 (read only)
 */
#ifdef CFG_LED_BASE

/* BR7 is configured as follows:
 *
 *     - Base address of 0xA0000000
 *     - 8 bit port size
 *     - Data errors checking is disabled
 *     - Read and write access
 *     - GPCM 60x bus
 *     - Access are handled by the memory controller according to MSEL
 *     - Not used for atomic operations
 *     - No data pipelining is done
 *     - Valid
 */
#  define CFG_BR7_PRELIM  ((CFG_LED_BASE & BRx_BA_MSK)	 |\
			   BRx_PS_8			 |\
			   BRx_MS_GPCM_P		 |\
			   BRx_V)

/* OR7 is configured as follows:
 *
 *     - 1 byte
 *     - *BCTL0 is asserted upon access to the current memory bank
 *     - *CW / *WE are negated a quarter of a clock earlier
 *     - *CS is output at the same time as the address lines
 *     - Uses a clock cycle length of 15
 *     - *PSDVAL is generated internally by the memory controller
 *	 unless *GTA is asserted earlier externally.
 *     - Relaxed timing is generated by the GPCM for accesses
 *	 initiated to this memory region.
 *     - One idle clock is inserted between a read access from the
 *	 current bank and the next access.
 */
#  define CFG_OR7_PRELIM  (ORxG_AM_MSK		       |\
			   ORxG_CSNT		       |\
			   ORxG_ACS_DIV1	       |\
			   ORxG_SCY_15_CLK	       |\
			   ORxG_TRLX		       |\
			   ORxG_EHTR)
#endif /* CFG_LED_BASE */

/*
 * Internal Definitions
 *
 * Boot Flags
 */
#define BOOTFLAG_COLD	0x01	/* Normal Power-On: Boot from FLASH  */
#define BOOTFLAG_WARM	0x02	/* Software reboot		     */

#endif	/* __CONFIG_H */