我使用的是Altera 的fpga 里面有两个arm-a9内核 可是当我调试时总是只有一个在运行 不知如何唤醒另一个。
如图 A9_1始终不能运行
.ds文件
############################################################ # # Copyright Altera 2013 # All Rights Reserved # File: preloader.ds # ############################################################ # # stop processor if running # reset system stop wait 5s set semihosting enabled 0 # # load the preloader (a.k.a the spl from our uboot dist) # loadfile "$sdir/uboot-socfpga/spl/u-boot-spl" 0x0 # # set pc to entry point # set debug-from *$entrypoint # Set start-at setting to address of $entrypoint start # # delete any breakpoints # delete # # set hw breakpoint in spl in function, spl_boot_device, # The function, spl_boot_device, is called right before the spl tries # to load. We stop here so we don't have to change any spl. # tbreak spl_boot_device # tell target to continue executing spl cont # wait for breakpoint wait 60s
下面是我startup.s 代码
; ;******************************************************************************************************** ; EXCEPTION VECTORS & STARTUP CODE ; ; File : startup.s ; For : Cortex A9 on Altera SOC ; Toolchain : ARMCC ;******************************************************************************************************** ; ;******************************************************************************************************** ; MACROS AND DEFINITIONS ;******************************************************************************************************** ; Mode, correspords to bits 0-5 in CPSR MODE_BITS EQU 0x1F ; Bit mask for mode bits in CPSR USR_MODE EQU 0x10 ; User mode FIQ_MODE EQU 0x11 ; Fast Interrupt Request mode IRQ_MODE EQU 0x12 ; Interrupt Request mode SVC_MODE EQU 0x13 ; Supervisor mode ABT_MODE EQU 0x17 ; Abort mode UND_MODE EQU 0x1B ; Undefined Instruction mode SYS_MODE EQU 0x1F ; System mode ; Control register C1 CTRL_C1_M EQU 0x0001 CTRL_C1_A EQU 0x0002 CTRL_C1_C EQU 0x0004 CTRL_C1_W EQU 0x0008 CTRL_C1_S EQU 0x0100 CTRL_C1_R EQU 0x0200 CTRL_C1_Z EQU 0x0800 CTRL_C1_I EQU 0x1000 CTRL_C1_V EQU 0x2000 CTRL_C1_RR EQU 0x4000 ; Auxiliary control register C1 AUX_C1_FW EQU 0x0001 AUX_C1_SMP EQU 0x0040 ; Level 1 page table descriptor templates TTB_ENTRY_SUPERSEC_FAULT EQU 0x50006 TTB_ENTRY_SUPERSEC_STRONG EQU 0x50C02 TTB_ENTRY_SUPERSEC_DEV EQU 0x50C06 TTB_ENTRY_SUPERSEC_NORM EQU 0x55C06 IMPORT OS_CPU_ARM_ExceptUndefInstrHndlr IMPORT OS_CPU_ARM_ExceptSwiHndlr IMPORT OS_CPU_ARM_ExceptPrefetchAbortHndlr IMPORT OS_CPU_ARM_ExceptDataAbortHndlr IMPORT OS_CPU_ARM_ExceptIrqHndlr IMPORT OS_CPU_ARM_ExceptFiqHndlr IMPORT BSP_DCacheInvalidateAll IMPORT BSP_SCUEn IMPORT BSP_SCUInvalidateAll PRESERVE8 AREA StartUp,CODE,READONLY ENTRY EXPORT Start Start Vectors LDR PC, [PC,#24] ; Absolute jump can reach 4 GByte LDR PC, [PC,#24] ; Branch to undef_handler LDR PC, [PC,#24] ; Branch to swi_handler LDR PC, [PC,#24] ; Branch to prefetch_handler LDR PC, [PC,#24] ; Branch to data_handler DCD 0 LDR PC, [PC,#24] ; Branch to irq_handler LDR PC, [PC,#24] ; Branch to fiq_handler DCD Reset_Handler DCD OS_CPU_ARM_ExceptUndefInstrHndlr DCD OS_CPU_ARM_ExceptSwiHndlr DCD OS_CPU_ARM_ExceptPrefetchAbortHndlr DCD OS_CPU_ARM_ExceptDataAbortHndlr DCD 0 DCD OS_CPU_ARM_ExceptIrqHndlr DCD OS_CPU_ARM_ExceptFiqHndlr EXPORT Reset_Handler Reset_Handler FUNCTION {} CPSID i MRC p15, 0, r0, c1, c0, 0 ; Read control register BIC r0, r0, #CTRL_C1_M ; Disable MMU BIC r0, r0, #CTRL_C1_C ; Disable data cache BIC r0, r0, #CTRL_C1_Z ; Disable branch prediction BIC r0, r0, #CTRL_C1_I ; Disable instruction cache MCR p15, 0, r0, c1, c0, 0 ; Write control register ISB DSB ; Init unused cores MRC p15, 0, r0, c0, c0, 5 ; Read CPU ID ANDS r0, r0, #0x03 BNE Parking IMPORT ||Image$$IRQ_STACK$$ZI$$Limit|| BIC r0, r0, #MODE_BITS ; Clear the mode bits ORR r0, r0, #IRQ_MODE ; Set IRQ mode bits MSR cpsr_c, r0 ; Change the mode LDR sp, =||Image$$IRQ_STACK$$ZI$$Limit|| ; End of IRQ_STACK IMPORT ||Image$$FIQ_STACK$$ZI$$Limit|| BIC r0, r0, #MODE_BITS ; Clear the mode bits ORR r0, r0, #FIQ_MODE ; Set FIQ mode bits MSR cpsr_c, r0 ; Change the mode LDR sp, =||Image$$FIQ_STACK$$ZI$$Limit|| ; End of FIQ_STACK IMPORT ||Image$$ABT_STACK$$ZI$$Limit|| BIC r0, r0, #MODE_BITS ; Clear the mode bits ORR r0, r0, #ABT_MODE ; Set ABT mode bits MSR cpsr_c, r0 ; Change the mode LDR sp, =||Image$$ABT_STACK$$ZI$$Limit|| ; End of ABT_STACK IMPORT ||Image$$UND_STACK$$ZI$$Limit|| BIC r0, r0, #MODE_BITS ; Clear the mode bits ORR r0, r0, #UND_MODE ; Set UND mode bits MSR cpsr_c, r0 ; Change the mode LDR sp, =||Image$$UND_STACK$$ZI$$Limit|| ; End of UND_STACK IMPORT ||Image$$SYS_STACK$$ZI$$Limit|| BIC r0, r0, #MODE_BITS ; Clear the mode bits ORR r0, r0, #SYS_MODE ; Set SYS mode bits MSR cpsr_c, r0 ; Change the mode LDR sp, =||Image$$SYS_STACK$$ZI$$Limit|| ; End of SYS_STACK IMPORT ||Image$$SVC_STACK$$ZI$$Limit|| MRS r0, cpsr ; Original PSR value BIC r0, r0, #MODE_BITS ; Clear the mode bits ORR r0, r0, #SVC_MODE ; Set SVC mode bits MSR cpsr_c, r0 ; Change the mode LDR sp, =||Image$$SVC_STACK$$ZI$$Limit|| ; End of SVC_STACK LDR r0,=Vectors ; Set vector table location----------------------------------------------------- MCR p15, 0, r0, c12, c0, 0 MRC p15, 0, r0, c1, c0, 0 BIC r0, r0, #CTRL_C1_V ; Disable high vector MCR p15, 0, r0, c1, c0, 0 MOV r0, #0x0 MCR p15, 0, r0, c7, c5, 6 ; Invalidate branch predictor MOV r0, #0x0 MCR p15, 0, r0, c8, c7, 0 ; Invalidate TLB MOV r0, #0 MCR p15, 0, r0, c7, c5, 0 ; Invalidate instruction cache BL BSP_DCacheInvalidateAll ; Set domain access MRC p15, 0, r0, c3, c0, 0 LDR r0, =0x55555555 MCR p15, 0, r0, c3, c0, 0 ; Set access permission for VFP & NEON MRC p15, 0, r0, c1, c0, 2 ORR r0, r0, #(0xF << 20) MCR p15, 0, r0, c1, c0, 2 ISB ; Start the VFP and NEON engine MOV r0, #0x40000000 VMSR FPEXC, r0 ; Setup page table. IMPORT ARMv7Attbl_SuperSecMap IMPORT ||Image$$PAGE_TABLE$$ZI$$Base|| LDR r4, =||Image$$PAGE_TABLE$$ZI$$Base|| ; Map the entire memory as device by default MOV r0, r4 MOV32 r1, #TTB_ENTRY_SUPERSEC_DEV MOV32 r2, #0x00000000 MOV32 r3, #0x00000000 BL ARMv7Attbl_SuperSecMap MOV r0, r4 MOV32 r1, #TTB_ENTRY_SUPERSEC_NORM ; Map SDRAM as normal memory MOV32 r2, #0x01000000 MOV32 r3, #0x39000000 BL ARMv7Attbl_SuperSecMap MCR p15, 0, r4, c2, c0, 0 DSB MRC p15, 0, r0, c1, c0, 0 ; Read control register ORR r0, r0, #CTRL_C1_M ; Enable MMU, See note #3 MCR p15, 0, r0, c1, c0, 0 ; Write control register DSB BL BSP_SCUEn ; Enable the SCU MOV r0, #0 MOV r1, #0xF BL BSP_SCUInvalidateAll ; Invalidate SCU data ; Join SMP & enable maintenance broadcasts, See note #4 MRC p15, 0, r0, c1, c0, 1 ORR r0, r0, #AUX_C1_SMP ORR r0, r0, #AUX_C1_FW MCR p15, 0, r0, c1, c0, 1 DSB ; Disable ECC error interrupts since the preloader may not init the ram IMPORT BSP_IntSrcDis MOV r0, #71 BL BSP_IntSrcDis MOV r0, #210 BL BSP_IntSrcDis IMPORT InitOS LDR r12,=InitOS ;初始化之后 等待FPGA_OS系统唤醒 BX r12 ENDFUNC Parking FUNCTION WFI B . ENDFUNC END
我想知道这是为什么 如何启动另一个。谢谢！
谢谢楼主，已经解决了~