_TEXT_BASE:
.word CONFIG_SYS_TEXT_BASE
-#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
-.globl _armboot_start
-_armboot_start:
- .word _start
-#endif
-
/*
* These are defined in the board-specific linker script.
*/
.word 0x0badc0de
#endif
-#if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
/* IRQ stack memory (calculated at run-time) + 8 bytes */
.globl IRQ_STACK_START_IN
IRQ_STACK_START_IN:
cmp r0, r6
beq clear_bss
-#ifndef CONFIG_SKIP_RELOCATE_UBOOT
copy_loop:
ldmia r0!, {r9-r10} /* copy from source address [r0] */
stmia r6!, {r9-r10} /* copy to target address [r1] */
str r4, [r2]
add r2, r2, #4
cmp r2, r3
- bne fixloop
+ blo fixloop
#endif
-#endif /* #ifndef CONFIG_SKIP_RELOCATE_UBOOT */
clear_bss:
#ifndef CONFIG_PRELOADER
_board_init_r: .word board_init_r
-#else /* #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) */
-/****************************************************************************/
-/* */
-/* the actual reset code */
-/* */
-/****************************************************************************/
-
-reset:
- /* disable mmu, set big-endian */
- mov r0, #0xf8
- mcr p15, 0, r0, c1, c0, 0
- CPWAIT r0
-
- /* invalidate I & D caches & BTB */
- mcr p15, 0, r0, c7, c7, 0
- CPWAIT r0
-
- /* invalidate I & Data TLB */
- mcr p15, 0, r0, c8, c7, 0
- CPWAIT r0
-
- /* drain write and fill buffers */
- mcr p15, 0, r0, c7, c10, 4
- CPWAIT r0
-
- /* disable write buffer coalescing */
- mrc p15, 0, r0, c1, c0, 1
- orr r0, r0, #1
- mcr p15, 0, r0, c1, c0, 1
- CPWAIT r0
-
- /* set EXP CS0 to the optimum timing */
- ldr r1, =CONFIG_SYS_EXP_CS0
- ldr r2, =IXP425_EXP_CS0
- str r1, [r2]
-
- /* make sure flash is visible at 0 */
-#if 0
- ldr r2, =IXP425_EXP_CFG0
- ldr r1, [r2]
- orr r1, r1, #0x80000000
- str r1, [r2]
-#endif
- mov r1, #CONFIG_SYS_SDR_CONFIG
- ldr r2, =IXP425_SDR_CONFIG
- str r1, [r2]
-
- /* disable refresh cycles */
- mov r1, #0
- ldr r3, =IXP425_SDR_REFRESH
- str r1, [r3]
-
- /* send nop command */
- mov r1, #3
- ldr r4, =IXP425_SDR_IR
- str r1, [r4]
- DELAY_FOR 0x4000, r0
-
- /* set SDRAM internal refresh val */
- ldr r1, =CONFIG_SYS_SDRAM_REFRESH_CNT
- str r1, [r3]
- DELAY_FOR 0x4000, r0
-
- /* send precharge-all command to close all open banks */
- mov r1, #2
- str r1, [r4]
- DELAY_FOR 0x4000, r0
-
- /* provide 8 auto-refresh cycles */
- mov r1, #4
- mov r5, #8
-111: str r1, [r4]
- DELAY_FOR 0x100, r0
- subs r5, r5, #1
- bne 111b
-
- /* set mode register in sdram */
- mov r1, #CONFIG_SYS_SDR_MODE_CONFIG
- str r1, [r4]
- DELAY_FOR 0x4000, r0
-
- /* send normal operation command */
- mov r1, #6
- str r1, [r4]
- DELAY_FOR 0x4000, r0
-
- /* copy */
- mov r0, #0
- mov r4, r0
- add r2, r0, #CONFIG_SYS_MONITOR_LEN
- mov r1, #0x10000000
- mov r5, r1
-
- 30:
- ldr r3, [r0], #4
- str r3, [r1], #4
- cmp r0, r2
- bne 30b
-
- /* invalidate I & D caches & BTB */
- mcr p15, 0, r0, c7, c7, 0
- CPWAIT r0
-
- /* invalidate I & Data TLB */
- mcr p15, 0, r0, c8, c7, 0
- CPWAIT r0
-
- /* drain write and fill buffers */
- mcr p15, 0, r0, c7, c10, 4
- CPWAIT r0
-
- /* move flash to 0x50000000 */
- ldr r2, =IXP425_EXP_CFG0
- ldr r1, [r2]
- bic r1, r1, #0x80000000
- str r1, [r2]
-
- nop
- nop
- nop
- nop
- nop
- nop
-
- /* invalidate I & Data TLB */
- mcr p15, 0, r0, c8, c7, 0
- CPWAIT r0
-
- /* enable I cache */
- mrc p15, 0, r0, c1, c0, 0
- orr r0, r0, #MMU_Control_I
- mcr p15, 0, r0, c1, c0, 0
- CPWAIT r0
-
- mrs r0,cpsr /* set the cpu to SVC32 mode */
- bic r0,r0,#0x1f /* (superviser mode, M=10011) */
- orr r0,r0,#0x13
- msr cpsr,r0
-
-#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 */
-
- /* Set up the stack */
-stack_setup:
- ldr r0, _TEXT_BASE /* upper 128 KiB: relocated uboot */
- sub r0, r0, #CONFIG_SYS_MALLOC_LEN /* malloc area */
- sub r0, r0, #GENERATED_GBL_DATA_SIZE /* bdinfo */
-#ifdef CONFIG_USE_IRQ
- sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
-#endif
- 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, #0x00000000 /* clear */
-
-clbss_l:str r2, [r0] /* clear loop... */
- add r0, r0, #4
- cmp r0, r1
- blo clbss_l
-
- ldr pc, _start_armboot
-
-_start_armboot: .word start_armboot
-#endif /* #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) */
-
/****************************************************************************/
/* */
stmia sp, {r0 - r12} /* Calling r0-r12 */
add r8, sp, #S_PC
-#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
- ldr r2, _armboot_start
- sub r2, r2, #(CONFIG_STACKSIZE+CONFIG_SYS_MALLOC_LEN)
- sub r2, r2, #(GENERATED_GBL_DATA_SIZE+8) @ set base 2 words into abort stack
-#else
ldr r2, IRQ_STACK_START_IN
-#endif
ldmia r2, {r2 - r4} /* get pc, cpsr, old_r0 */
add r0, sp, #S_FRAME_SIZE /* restore sp_SVC */
.endm
.macro get_bad_stack
-#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
- ldr r13, _armboot_start @ setup our mode stack
- sub r13, r13, #(CONFIG_STACKSIZE+CONFIG_SYS_MALLOC_LEN)
- sub r13, r13, #(GENERATED_GBL_DATA_SIZE+8) @ reserved a couple spots in abort stack
-#else
ldr r13, IRQ_STACK_START_IN @ setup our mode stack
-#endif
str lr, [r13] @ save caller lr / spsr
mrs lr, spsr
projects / u-boot / blobdiff