-_board_init_r: .word board_init_r
-#endif
-
-#else /* #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) */
-
-/*
- * the actual reset code
- */
-
-reset:
- /*
- * set the cpu to SVC32 mode
- */
- mrs r0, cpsr
- bic r0, r0, #0x3f
- orr r0, r0, #0xd3
- msr cpsr, r0
-
-/*
- *************************************************************************
- *
- * CPU_init_critical registers
- *
- * setup important registers
- * setup memory timing
- *
- *************************************************************************
- */
- /*
- * we do sys-critical inits only at reboot,
- * not when booting from ram!
- */
-cpu_init_crit:
- /*
- * When booting from NAND - it has definitely been a reset, so, no need
- * to flush caches and disable the MMU
- */
-#ifndef CONFIG_NAND_SPL
- /*
- * flush v4 I/D caches
- */
- mov r0, #0
- mcr p15, 0, r0, c7, c7, 0 /* flush v3/v4 cache */
- mcr p15, 0, r0, c8, c7, 0 /* flush v4 TLB */
-
- /*
- * disable MMU stuff and caches
- */
- mrc p15, 0, r0, c1, c0, 0
- bic r0, r0, #0x00002300 @ clear bits 13, 9:8 (--V- --RS)
- bic r0, r0, #0x00000087 @ clear bits 7, 2:0 (B--- -CAM)
- orr r0, r0, #0x00000002 @ set bit 2 (A) Align
- orr r0, r0, #0x00001000 @ set bit 12 (I) I-Cache
-
- /* Prepare to disable the MMU */
- adr r2, mmu_disable_phys
- sub r2, r2, #(CONFIG_SYS_PHY_UBOOT_BASE - CONFIG_SYS_TEXT_BASE)
- b mmu_disable
-
- .align 5
- /* Run in a single cache-line */
-mmu_disable:
- mcr p15, 0, r0, c1, c0, 0
- nop
- nop
- mov pc, r2
-mmu_disable_phys:
-
-#ifdef CONFIG_DISABLE_TCM
- /*
- * Disable the TCMs
- */
- mrc p15, 0, r0, c0, c0, 2 /* Return TCM details */
- cmp r0, #0
- beq skip_tcmdisable
- mov r1, #0
- mov r2, #1
- tst r0, r2
- mcrne p15, 0, r1, c9, c1, 1 /* Disable Instruction TCM if present*/
- tst r0, r2, LSL #16
- mcrne p15, 0, r1, c9, c1, 0 /* Disable Data TCM if present*/
-skip_tcmdisable:
-#endif
-#endif
-
-#ifdef CONFIG_PERIPORT_REMAP
- /* Peri port setup */
- ldr r0, =CONFIG_PERIPORT_BASE
- orr r0, r0, #CONFIG_PERIPORT_SIZE
- mcr p15,0,r0,c15,c2,4
-#endif
-
- /*
- * Go setup Memory and board specific bits prior to relocation.
- */
- bl lowlevel_init /* go setup pll,mux,memory */
-
-#ifndef CONFIG_SKIP_RELOCATE_UBOOT
-relocate: /* relocate U-Boot to RAM */
- adr r0, _start /* r0 <- current position of code */
- ldr r1, _TEXT_BASE /* test if we run from flash or RAM */
- cmp r0, r1 /* don't reloc during debug */
- beq stack_setup
-
- ldr r2, _armboot_start
- ldr r3, _bss_start
- sub r2, r3, r2 /* r2 <- size of armboot */
- add r2, r0, r2 /* r2 <- source end address */
-
-copy_loop:
- ldmia r0!, {r3-r10} /* copy from source address [r0] */
- stmia r1!, {r3-r10} /* copy to target address [r1] */
- cmp r0, r2 /* until source end address [r2] */
- blo copy_loop
-#endif /* CONFIG_SKIP_RELOCATE_UBOOT */
-
-#ifdef CONFIG_ENABLE_MMU
-enable_mmu:
- /* enable domain access */
- ldr r5, =0x0000ffff
- mcr p15, 0, r5, c3, c0, 0 /* load domain access register */
-
- /* Set the TTB register */
- ldr r0, _mmu_table_base
- ldr r1, =CONFIG_SYS_PHY_UBOOT_BASE
- ldr r2, =0xfff00000
- bic r0, r0, r2
- orr r1, r0, r1
- mcr p15, 0, r1, c2, c0, 0
-
- /* Enable the MMU */
- mrc p15, 0, r0, c1, c0, 0
- orr r0, r0, #1 /* Set CR_M to enable MMU */
-
- /* Prepare to enable the MMU */
- adr r1, skip_hw_init
- and r1, r1, #0x3fc
- ldr r2, _TEXT_BASE
- ldr r3, =0xfff00000
- and r2, r2, r3
- orr r2, r2, r1
- b mmu_enable
-
- .align 5
- /* Run in a single cache-line */
-mmu_enable:
-
- mcr p15, 0, r0, c1, c0, 0
- nop
- nop
- mov pc, r2
-skip_hw_init:
-#endif
-
- /* Set up the stack */
-stack_setup:
- ldr r0, =CONFIG_SYS_UBOOT_BASE /* base of copy in DRAM */
- sub r0, r0, #CONFIG_SYS_MALLOC_LEN /* malloc area */
- sub r0, r0, #CONFIG_SYS_GBL_DATA_SIZE /* bdinfo */
- sub sp, r0, #12 /* leave 3 words for abort-stack */
- bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
-
-clear_bss:
- ldr r0, _bss_start /* find start of bss segment */
- ldr r1, _bss_end /* stop here */
- mov r2, #0 /* clear */
-
-clbss_l:
- str r2, [r0] /* clear loop... */
- add r0, r0, #4
- cmp r0, r1
- blo clbss_l
-
-#ifndef CONFIG_NAND_SPL
- ldr pc, _start_armboot
-
-_start_armboot:
- .word start_armboot
-#else
- b nand_boot
-/* .word nand_boot*/
-#endif
-
-#endif /* #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) */
-
-#ifdef CONFIG_ENABLE_MMU
-_mmu_table_base:
- .word mmu_table
-#endif
-
-#ifndef CONFIG_NAND_SPL
-/*
- * we assume that cache operation is done before. (eg. cleanup_before_linux())
- * actually, we don't need to do anything about cache if not use d-cache in
- * U-Boot. So, in this function we clean only MMU. by scsuh
- *
- * void theLastJump(void *kernel, int arch_num, uint boot_params);
- */
-#ifdef CONFIG_ENABLE_MMU
- .globl theLastJump
-theLastJump:
- mov r9, r0
- ldr r3, =0xfff00000
- ldr r4, _TEXT_PHY_BASE
- adr r5, phy_last_jump
- bic r5, r5, r3
- orr r5, r5, r4
- mov pc, r5
-phy_last_jump:
- /*
- * disable MMU stuff
- */
- mrc p15, 0, r0, c1, c0, 0
- bic r0, r0, #0x00002300 /* clear bits 13, 9:8 (--V- --RS) */
- bic r0, r0, #0x00000087 /* clear bits 7, 2:0 (B--- -CAM) */
- orr r0, r0, #0x00000002 /* set bit 2 (A) Align */
- orr r0, r0, #0x00001000 /* set bit 12 (I) I-Cache */
- mcr p15, 0, r0, c1, c0, 0
-
- mcr p15, 0, r0, c8, c7, 0 /* flush v4 TLB */
-
- mov r0, #0
- mov pc, r9
-#endif
-
-
-/*
- *************************************************************************
- *
- * Interrupt handling
- *
- *************************************************************************
- */
-@
-@ IRQ stack frame.
-@
-#define S_FRAME_SIZE 72
-
-#define S_OLD_R0 68
-#define S_PSR 64
-#define S_PC 60
-#define S_LR 56
-#define S_SP 52
-
-#define S_IP 48
-#define S_FP 44
-#define S_R10 40
-#define S_R9 36
-#define S_R8 32
-#define S_R7 28
-#define S_R6 24
-#define S_R5 20
-#define S_R4 16
-#define S_R3 12
-#define S_R2 8
-#define S_R1 4
-#define S_R0 0
-
-#define MODE_SVC 0x13
-#define I_BIT 0x80
-
-/*
- * use bad_save_user_regs for abort/prefetch/undef/swi ...
- */
-
- .macro bad_save_user_regs
- /* carve out a frame on current user stack */
- sub sp, sp, #S_FRAME_SIZE
- /* Save user registers (now in svc mode) r0-r12 */
- stmia sp, {r0 - r12}
-
-#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
- ldr r2, _armboot_start
- sub r2, r2, #(CONFIG_SYS_MALLOC_LEN)
- /* set base 2 words into abort stack */
- sub r2, r2, #(CONFIG_SYS_GBL_DATA_SIZE+8)
-#else
- ldr r2, IRQ_STACK_START_IN
-#endif
- /* get values for "aborted" pc and cpsr (into parm regs) */
- ldmia r2, {r2 - r3}
- /* grab pointer to old stack */
- add r0, sp, #S_FRAME_SIZE
-
- add r5, sp, #S_SP
- mov r1, lr
- /* save sp_SVC, lr_SVC, pc, cpsr */
- stmia r5, {r0 - r3}
- /* save current stack into r0 (param register) */
- mov r0, sp
- .endm
-
- .macro get_bad_stack
-#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
- /* setup our mode stack (enter in banked mode) */
- ldr r13, _armboot_start
- /* move past malloc pool */
- sub r13, r13, #(CONFIG_SYS_MALLOC_LEN)
- /* move to reserved a couple spots for abort stack */
- sub r13, r13, #(CONFIG_SYS_GBL_DATA_SIZE + 8)
-#else
- ldr r13, IRQ_STACK_START_IN @ setup our mode stack
-#endif
-
- /* save caller lr in position 0 of saved stack */
- str lr, [r13]
- /* get the spsr */
- mrs lr, spsr
- /* save spsr in position 1 of saved stack */
- str lr, [r13, #4]
-
- /* prepare SVC-Mode */
- mov r13, #MODE_SVC
- @ msr spsr_c, r13
- /* switch modes, make sure moves will execute */
- msr spsr, r13
- /* capture return pc */
- mov lr, pc
- /* jump to next instruction & switch modes. */
- movs pc, lr
- .endm
-
- .macro get_bad_stack_swi
- /* space on current stack for scratch reg. */
- sub r13, r13, #4
- /* save R0's value. */
- str r0, [r13]
-#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
- /* get data regions start */
- ldr r0, _armboot_start
- /* move past malloc pool */
- sub r0, r0, #(CONFIG_SYS_MALLOC_LEN)
- /* move past gbl and a couple spots for abort stack */
- sub r0, r0, #(CONFIG_SYS_GBL_DATA_SIZE + 8)
-#else
- ldr r13, IRQ_STACK_START_IN @ setup our mode stack
-#endif
- /* save caller lr in position 0 of saved stack */
- str lr, [r0]
- /* get the spsr */
- mrs r0, spsr
- /* save spsr in position 1 of saved stack */
- str lr, [r0, #4]
- /* restore r0 */
- ldr r0, [r13]
- /* pop stack entry */
- add r13, r13, #4
- .endm
-
-/*
- * exception handlers
- */
- .align 5
-undefined_instruction:
- get_bad_stack
- bad_save_user_regs
- bl do_undefined_instruction
-
- .align 5
-software_interrupt:
- get_bad_stack_swi
- bad_save_user_regs
- bl do_software_interrupt
-
- .align 5
-prefetch_abort:
- get_bad_stack
- bad_save_user_regs
- bl do_prefetch_abort
-
- .align 5
-data_abort:
- get_bad_stack
- bad_save_user_regs
- bl do_data_abort
-
- .align 5
-not_used:
- get_bad_stack
- bad_save_user_regs
- bl do_not_used
-
- .align 5
-irq:
- get_bad_stack
- bad_save_user_regs
- bl do_irq
-
- .align 5
-fiq:
- get_bad_stack
- bad_save_user_regs
- bl do_fiq
-#endif /* CONFIG_NAND_SPL */