|
|
|
@ -89,48 +89,35 @@ _end_vect: |
|
|
|
|
_TEXT_BASE: |
|
|
|
|
.word 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. |
|
|
|
|
* Subtracting _start from them lets the linker put their |
|
|
|
|
* relative position in the executable instead of leaving |
|
|
|
|
* them null. |
|
|
|
|
*/ |
|
|
|
|
.globl _bss_start
|
|
|
|
|
_bss_start: |
|
|
|
|
.word __bss_start
|
|
|
|
|
|
|
|
|
|
.globl _bss_end
|
|
|
|
|
_bss_end: |
|
|
|
|
.word _end
|
|
|
|
|
|
|
|
|
|
#if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) |
|
|
|
|
.globl _datarel_start
|
|
|
|
|
_datarel_start: |
|
|
|
|
.word __datarel_start
|
|
|
|
|
.globl _bss_start_ofs
|
|
|
|
|
_bss_start_ofs: |
|
|
|
|
.word __bss_start - _start |
|
|
|
|
|
|
|
|
|
.globl _datarelrolocal_start
|
|
|
|
|
_datarelrolocal_start: |
|
|
|
|
.word __datarelrolocal_start
|
|
|
|
|
.globl _bss_end_ofs
|
|
|
|
|
_bss_end_ofs: |
|
|
|
|
.word _end - _start |
|
|
|
|
|
|
|
|
|
.globl _datarellocal_start
|
|
|
|
|
_datarellocal_start: |
|
|
|
|
.word __datarellocal_start
|
|
|
|
|
.globl _datarel_start_ofs
|
|
|
|
|
_datarel_start_ofs: |
|
|
|
|
.word __datarel_start - _start |
|
|
|
|
|
|
|
|
|
.globl _datarelro_start
|
|
|
|
|
_datarelro_start: |
|
|
|
|
.word __datarelro_start
|
|
|
|
|
.globl _datarelrolocal_start_ofs
|
|
|
|
|
_datarelrolocal_start_ofs: |
|
|
|
|
.word __datarelrolocal_start - _start |
|
|
|
|
|
|
|
|
|
.globl _got_start
|
|
|
|
|
_got_start: |
|
|
|
|
.word __got_start
|
|
|
|
|
.globl _datarellocal_start_ofs
|
|
|
|
|
_datarellocal_start_ofs: |
|
|
|
|
.word __datarellocal_start - _start |
|
|
|
|
|
|
|
|
|
.globl _got_end
|
|
|
|
|
_got_end: |
|
|
|
|
.word __got_end
|
|
|
|
|
#endif |
|
|
|
|
.globl _datarelro_start_ofs
|
|
|
|
|
_datarelro_start_ofs: |
|
|
|
|
.word __datarelro_start - _start |
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_USE_IRQ |
|
|
|
|
/* IRQ stack memory (calculated at run-time) */ |
|
|
|
@ -225,9 +212,8 @@ stack_setup: |
|
|
|
|
|
|
|
|
|
adr r0, _start |
|
|
|
|
ldr r2, _TEXT_BASE |
|
|
|
|
ldr r3, _bss_start |
|
|
|
|
sub r2, r3, r2 /* r2 <- size of armboot */ |
|
|
|
|
add r2, r0, r2 /* r2 <- source end address */ |
|
|
|
|
ldr r3, _bss_start_ofs |
|
|
|
|
add r2, r0, r3 /* r2 <- source end address */ |
|
|
|
|
cmp r0, r6 |
|
|
|
|
beq clear_bss |
|
|
|
|
|
|
|
|
@ -239,36 +225,54 @@ copy_loop: |
|
|
|
|
blo copy_loop |
|
|
|
|
|
|
|
|
|
#ifndef CONFIG_PRELOADER |
|
|
|
|
/* fix got entries */ |
|
|
|
|
ldr r1, _TEXT_BASE |
|
|
|
|
mov r0, r7 /* reloc addr */ |
|
|
|
|
ldr r2, _got_start /* addr in Flash */ |
|
|
|
|
ldr r3, _got_end /* addr in Flash */ |
|
|
|
|
sub r3, r3, r1 |
|
|
|
|
add r3, r3, r0 |
|
|
|
|
sub r2, r2, r1 |
|
|
|
|
add r2, r2, r0 |
|
|
|
|
|
|
|
|
|
/* |
|
|
|
|
* fix .rel.dyn relocations |
|
|
|
|
*/ |
|
|
|
|
ldr r0, _TEXT_BASE /* r0 <- Text base */ |
|
|
|
|
sub r9, r7, r0 /* r9 <- relocation offset */ |
|
|
|
|
ldr r10, _dynsym_start_ofs /* r10 <- sym table ofs */ |
|
|
|
|
add r10, r10, r0 /* r10 <- sym table in FLASH */ |
|
|
|
|
ldr r2, _rel_dyn_start_ofs /* r2 <- rel dyn start ofs */ |
|
|
|
|
add r2, r2, r0 /* r2 <- rel dyn start in FLASH */ |
|
|
|
|
ldr r3, _rel_dyn_end_ofs /* r3 <- rel dyn end ofs */ |
|
|
|
|
add r3, r3, r0 /* r3 <- rel dyn end in FLASH */ |
|
|
|
|
fixloop: |
|
|
|
|
ldr r4, [r2] |
|
|
|
|
sub r4, r4, r1 |
|
|
|
|
add r4, r4, r0 |
|
|
|
|
str r4, [r2] |
|
|
|
|
add r2, r2, #4 |
|
|
|
|
ldr r0, [r2] /* r0 <- location to fix up, IN FLASH! */ |
|
|
|
|
add r0, r9 /* r0 <- location to fix up in RAM */ |
|
|
|
|
ldr r1, [r2, #4] |
|
|
|
|
and r8, r1, #0xff |
|
|
|
|
cmp r8, #23 /* relative fixup? */ |
|
|
|
|
beq fixrel |
|
|
|
|
cmp r8, #2 /* absolute fixup? */ |
|
|
|
|
beq fixabs |
|
|
|
|
/* ignore unknown type of fixup */ |
|
|
|
|
b fixnext |
|
|
|
|
fixabs: |
|
|
|
|
/* absolute fix: set location to (offset) symbol value */ |
|
|
|
|
mov r1, r1, LSR #4 /* r1 <- symbol index in .dynsym */ |
|
|
|
|
add r1, r10, r1 /* r1 <- address of symbol in table */ |
|
|
|
|
ldr r1, [r1, #4] /* r1 <- symbol value */ |
|
|
|
|
add r1, r9 /* r1 <- relocated sym addr */ |
|
|
|
|
b fixnext |
|
|
|
|
fixrel: |
|
|
|
|
/* relative fix: increase location by offset */ |
|
|
|
|
ldr r1, [r0] |
|
|
|
|
add r1, r1, r9 |
|
|
|
|
fixnext: |
|
|
|
|
str r1, [r0] |
|
|
|
|
add r2, r2, #8 /* each rel.dyn entry is 8 bytes */ |
|
|
|
|
cmp r2, r3 |
|
|
|
|
bne fixloop |
|
|
|
|
ble fixloop |
|
|
|
|
#endif |
|
|
|
|
#endif /* #ifndef CONFIG_SKIP_RELOCATE_UBOOT */ |
|
|
|
|
|
|
|
|
|
clear_bss: |
|
|
|
|
#ifndef CONFIG_PRELOADER |
|
|
|
|
ldr r0, _bss_start |
|
|
|
|
ldr r1, _bss_end |
|
|
|
|
ldr r0, _bss_start_ofs |
|
|
|
|
ldr r1, _bss_end_ofs |
|
|
|
|
ldr r3, _TEXT_BASE /* Text base */ |
|
|
|
|
mov r4, r7 /* reloc addr */ |
|
|
|
|
sub r0, r0, r3 |
|
|
|
|
add r0, r0, r4 |
|
|
|
|
sub r1, r1, r3 |
|
|
|
|
add r1, r1, r4 |
|
|
|
|
mov r2, #0x00000000 /* clear */ |
|
|
|
|
|
|
|
|
@ -283,24 +287,34 @@ clbss_l:str r2, [r0] /* clear loop... */ |
|
|
|
|
* initialization, now running from RAM. |
|
|
|
|
*/ |
|
|
|
|
#ifdef CONFIG_NAND_SPL |
|
|
|
|
ldr pc, _nand_boot |
|
|
|
|
|
|
|
|
|
_nand_boot: .word nand_boot |
|
|
|
|
ldr r0, _nand_boot_ofs |
|
|
|
|
adr r1, _start |
|
|
|
|
add pc, r0, r1 |
|
|
|
|
_nand_boot_ofs |
|
|
|
|
: .word nand_boot - _start |
|
|
|
|
#else |
|
|
|
|
jump_2_ram: |
|
|
|
|
ldr r0, _TEXT_BASE |
|
|
|
|
ldr r2, _board_init_r |
|
|
|
|
sub r2, r2, r0 |
|
|
|
|
add r2, r2, r7 /* position from board_init_r in RAM */ |
|
|
|
|
ldr r0, _board_init_r_ofs |
|
|
|
|
adr r1, _start |
|
|
|
|
add r0, r0, r1 |
|
|
|
|
add lr, r0, r9 |
|
|
|
|
/* setup parameters for board_init_r */ |
|
|
|
|
mov r0, r5 /* gd_t */ |
|
|
|
|
mov r1, r7 /* dest_addr */ |
|
|
|
|
/* jump to it ... */ |
|
|
|
|
mov lr, r2 |
|
|
|
|
mov pc, lr |
|
|
|
|
|
|
|
|
|
_board_init_r: .word board_init_r |
|
|
|
|
_board_init_r_ofs: |
|
|
|
|
.word board_init_r - _start |
|
|
|
|
#endif |
|
|
|
|
|
|
|
|
|
_rel_dyn_start_ofs: |
|
|
|
|
.word __rel_dyn_start - _start |
|
|
|
|
_rel_dyn_end_ofs: |
|
|
|
|
.word __rel_dyn_end - _start |
|
|
|
|
_dynsym_start_ofs: |
|
|
|
|
.word __dynsym_start - _start |
|
|
|
|
|
|
|
|
|
#else /* #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) */ |
|
|
|
|
/* |
|
|
|
|
* the actual reset code |
|
|
|
@ -375,8 +389,11 @@ stack_setup: |
|
|
|
|
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 */ |
|
|
|
|
adr r2, _start |
|
|
|
|
ldr r0, _bss_start_ofs /* find start of bss segment */ |
|
|
|
|
add r0, r0, r2 |
|
|
|
|
ldr r1, _bss_end_ofs /* stop here */ |
|
|
|
|
add r1, r1, r2 |
|
|
|
|
mov r2, #0x00000000 /* clear */ |
|
|
|
|
|
|
|
|
|
#ifndef CONFIG_PRELOADER |
|
|
|
@ -386,15 +403,19 @@ clbss_l:str r2, [r0] /* clear loop... */ |
|
|
|
|
bne clbss_l |
|
|
|
|
#endif |
|
|
|
|
|
|
|
|
|
ldr pc, _start_armboot |
|
|
|
|
ldr r0, _start_armboot_ofs |
|
|
|
|
adr r1, _start |
|
|
|
|
add r0, r0, r1 |
|
|
|
|
ldr pc, r0 |
|
|
|
|
|
|
|
|
|
_start_armboot_ofs: |
|
|
|
|
#ifdef CONFIG_NAND_SPL |
|
|
|
|
_start_armboot: .word nand_boot |
|
|
|
|
.word nand_boot - _start |
|
|
|
|
#else |
|
|
|
|
#ifdef CONFIG_ONENAND_IPL |
|
|
|
|
_start_armboot: .word start_oneboot |
|
|
|
|
.word start_oneboot - _start |
|
|
|
|
#else |
|
|
|
|
_start_armboot: .word start_armboot |
|
|
|
|
.word start_armboot - _start |
|
|
|
|
#endif /* CONFIG_ONENAND_IPL */ |
|
|
|
|
#endif /* CONFIG_NAND_SPL */ |
|
|
|
|
|
|
|
|
@ -487,7 +508,7 @@ cpu_init_crit: |
|
|
|
|
#if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) |
|
|
|
|
ldr r2, IRQ_STACK_START_IN @ set base 2 words into abort stack
|
|
|
|
|
#else |
|
|
|
|
ldr r2, _armboot_start |
|
|
|
|
adr r2, _start |
|
|
|
|
sub r2, r2, #(CONFIG_SYS_MALLOC_LEN) |
|
|
|
|
sub r2, r2, #(CONFIG_SYS_GBL_DATA_SIZE+8) @ set base 2 words into abort stack
|
|
|
|
|
#endif |
|
|
|
@ -524,8 +545,8 @@ cpu_init_crit: |
|
|
|
|
#if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) |
|
|
|
|
ldr r13, IRQ_STACK_START_IN @ setup our mode stack (enter in banked mode)
|
|
|
|
|
#else |
|
|
|
|
ldr r13, _armboot_start @ setup our mode stack (enter in banked mode)
|
|
|
|
|
sub r13, r13, #(CONFIG_SYS_MALLOC_LEN) @ move past malloc pool |
|
|
|
|
adr r13, _start @ setup our mode stack (enter in banked mode)
|
|
|
|
|
sub r13, r13, #(CONFIG_STACKSIZE+CONFIG_SYS_MALLOC_LEN) @ move past malloc pool |
|
|
|
|
sub r13, r13, #(CONFIG_SYS_GBL_DATA_SIZE+8) @ move to reserved a couple spots for abort stack
|
|
|
|
|
#endif |
|
|
|
|
|
|
|
|
|