* MA 02111-1307 USA
*/
+#include <asm-offsets.h>
#include <config.h>
#include <version.h>
_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:
stack_setup:
mov sp, r4
-#ifndef CONFIG_SKIP_RELOCATE_UBOOT
adr r0, _start
ldr r2, _TEXT_BASE
ldr r3, _bss_start_ofs
cmp r0, r1
bne clbss_l
#endif /* #ifndef CONFIG_PRELOADER */
-#endif /* #ifndef CONFIG_SKIP_RELOCATE_UBOOT */
/*
* We are done. Do not return, instead branch to second part of board
jump_2_ram:
ldr r0, _board_init_r_ofs
adr r1, _start
- add r0, r0, r1
- add lr, r0, r9
+ add lr, r0, r1
+ add lr, lr, r9
/* setup parameters for board_init_r */
mov r0, r5 /* gd_t */
mov r1, r7 /* dest_addr */
_dynsym_start_ofs:
.word __dynsym_start - _start
-#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, #0x1f
- orr r0, r0, #0xd3
- msr cpsr,r0
-
-#if (CONFIG_OMAP34XX)
- /* Copy vectors to mask ROM indirect addr */
- adr r0, _start @ r0 <- current position of code
- add r0, r0, #4 @ skip reset vector
- mov r2, #64 @ r2 <- size to copy
- add r2, r0, r2 @ r2 <- source end address
- mov r1, #SRAM_OFFSET0 @ build vect addr
- mov r3, #SRAM_OFFSET1
- add r1, r1, r3
- mov r3, #SRAM_OFFSET2
- add r1, r1, r3
-next:
- 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]
- bne next @ loop until equal */
-#if !defined(CONFIG_SYS_NAND_BOOT) && !defined(CONFIG_SYS_ONENAND_BOOT)
- /* No need to copy/exec the clock code - DPLL adjust already done
- * in NAND/oneNAND Boot.
- */
- bl cpy_clk_code @ put dpll adjust code behind vectors
-#endif /* NAND Boot */
-#endif
- /* the mask ROM code should have PLL and others stable */
-#ifndef CONFIG_SKIP_LOWLEVEL_INIT
- bl cpu_init_crit
-#endif
-
-#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: @ copy 32 bytes at a time
- 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, #CONFIG_SYS_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 (if any). Is below tx (watch load addr - need space) */
-clear_bss:
- ldr r0, _bss_start @ find start of bss segment
- ldr r1, _bss_end @ stop here
- mov r2, #0x00000000 @ clear value
-clbss_l:
- str r2, [r0] @ clear BSS location
- cmp r0, r1 @ are we at the end yet
- add r0, r0, #4 @ increment clear index pointer
- bne clbss_l @ keep clearing till at end
-
- ldr pc, _start_armboot @ jump to C code
-
-_start_armboot: .word start_armboot
-#endif /* #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) */
-
/*************************************************************************
*
* CPU_init_critical registers
@ user stack
stmia sp, {r0 - r12} @ Save user registers (now in
@ svc mode) r0-r12
-#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
- ldr r2, _armboot_start
- sub r2, r2, #(CONFIG_SYS_MALLOC_LEN)
- sub r2, r2, #(CONFIG_SYS_GBL_DATA_SIZE + 8) @ set base 2 words into abort
-#else
ldr r2, IRQ_STACK_START_IN @ set base 2 words into abort
@ stack
-#endif
ldmia r2, {r2 - r3} @ get values for "aborted" pc
@ and cpsr (into parm regs)
add r0, sp, #S_FRAME_SIZE @ grab pointer to old stack
.endm
.macro get_bad_stack
-#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
- ldr r13, _armboot_start @ setup our mode stack (enter
- sub r13, r13, #(CONFIG_SYS_MALLOC_LEN) @ move past malloc pool
- sub r13, r13, #(CONFIG_SYS_GBL_DATA_SIZE + 8) @ move to reserved a couple
-#else
ldr r13, IRQ_STACK_START_IN @ setup our mode stack (enter
@ in banked mode)
-#endif
str lr, [r13] @ save caller lr in position 0
@ of saved stack
sub r13, r13, #4 @ space on current stack for
@ scratch reg.
str r0, [r13] @ save R0's value.
-#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
- ldr r0, _armboot_start @ get data regions start
- sub r0, r0, #(CONFIG_SYS_MALLOC_LEN) @ move past malloc pool
- sub r0, r0, #(CONFIG_SYS_GBL_DATA_SIZE + 8) @ move past gbl and a couple
-#else
ldr r0, IRQ_STACK_START_IN @ get data regions start
@ spots for abort stack
-#endif
str lr, [r0] @ save caller lr in position 0
@ of saved stack
mrs r0, spsr @ get the spsr
projects / karo-tx-uboot.git / blobdiff