* Copyright (C) 2002 Kyle Harris <kharris@nexus-tech.net>
* Copyright (C) 2003 Robert Schwebel <r.schwebel@pengutronix.de>
* Copyright (C) 2003 Kai-Uwe Bloem <kai-uwe.bloem@auerswald.de>
+ * Copyright (c) 2010 Marek Vasut <marek.vasut@gmail.com>
*
* See file CREDITS for list of people who contributed to this
* project.
* MA 02111-1307 USA
*/
+#include <asm-offsets.h>
#include <config.h>
#include <version.h>
#include <asm/arch/pxa-regs.h>
-#include <asm/arch/macro.h>
/* takes care the CP15 update has taken place */
.macro CPWAIT reg
_TEXT_BASE:
.word CONFIG_SYS_TEXT_BASE
-.globl _armboot_start
-_armboot_start:
- .word _start
-
/*
* These are defined in the board-specific linker script.
*/
-.globl _bss_start
-_bss_start:
- .word __bss_start
+.globl _bss_start_ofs
+_bss_start_ofs:
+ .word __bss_start - _start
-.globl _bss_end
-_bss_end:
- .word _end
+.globl _bss_end_ofs
+_bss_end_ofs:
+ .word _end - _start
#ifdef CONFIG_USE_IRQ
/* IRQ stack memory (calculated at run-time) */
IRQ_STACK_START_IN:
.word 0x0badc0de
-.globl _datarel_start
-_datarel_start:
- .word __datarel_start
-
-.globl _datarelrolocal_start
-_datarelrolocal_start:
- .word __datarelrolocal_start
-
-.globl _datarellocal_start
-_datarellocal_start:
- .word __datarellocal_start
-
-.globl _datarelro_start
-_datarelro_start:
- .word __datarelro_start
-
-.globl _got_start
-_got_start:
- .word __got_start
-
-.globl _got_end
-_got_end:
- .word __got_end
-
/*
* the actual reset code
*/
/* Set stackpointer in internal RAM to call board_init_f */
call_board_init_f:
ldr sp, =(CONFIG_SYS_INIT_SP_ADDR)
+ bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
ldr r0,=0x00000000
bl board_init_f
mov r4, r0 /* save addr_sp */
mov r5, r1 /* save addr of gd */
mov r6, r2 /* save addr of destination */
- mov r7, r2 /* save addr of destination */
/* Set up the stack */
stack_setup:
mov sp, r4
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 */
cmp r0, r6
- beq clear_bss
+ beq clear_bss /* skip relocation */
+ mov r1, r6 /* r1 <- scratch for copy_loop */
+ ldr r2, _TEXT_BASE
+ ldr r3, _bss_start_ofs
+ add r2, r0, r3 /* r2 <- source end address */
-#ifndef CONFIG_SKIP_RELOCATE_UBOOT
stmfd sp!, {r0-r12}
copy_loop:
ldmia r0!, {r3-r5, r7-r11} /* copy from source address [r0] */
- stmia r6!, {r3-r5, r7-r11} /* copy to target address [r1] */
+ stmia r1!, {r3-r5, r7-r11} /* copy to target address [r1] */
cmp r0, r2 /* until source end address [r2] */
blo copy_loop
ldmfd sp!, {r0-r12}
#ifndef CONFIG_PRELOADER
- /* fix got entries */
- ldr r1, _TEXT_BASE /* 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, r6, 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
-#endif
-#endif /* #ifndef CONFIG_SKIP_RELOCATE_UBOOT */
+ blo fixloop
+#endif /* #ifndef CONFIG_PRELOADER */
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
+ mov r4, r6 /* reloc addr */
add r0, r0, r4
- sub r1, r1, r3
add r1, r1, r4
mov r2, #0x00000000 /* clear */
add r0, r0, #4
cmp r0, r1
bne clbss_l
-#endif
+#endif /* #ifndef CONFIG_PRELOADER */
/*
* We are done. Do not return, instead branch to second part of board
* initialization, now running from RAM.
*/
#ifdef CONFIG_ONENAND_IPL
- ldr pc, _start_oneboot
+ ldr r0, _start_oneboot_ofs
+ mov pc, r0
-_start_oneboot: .word start_oneboot
+_start_oneboot_ofs
+ : .word start_oneboot
#else
- 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 lr, r0, r1
+ add lr, lr, r9
/* setup parameters for board_init_r */
mov r0, r5 /* gd_t */
- mov r1, r7 /* dest_addr */
+ mov r1, r6 /* dest_addr */
/* jump to it ... */
- mov lr, r2
mov pc, lr
-_board_init_r: .word board_init_r
-#endif
+_board_init_r_ofs:
+ .word board_init_r - _start
+#endif /* CONFIG_ONENAND_IPL */
-#else /* #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) */
+_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 /* CONFIG_PRELOADER */
/****************************************************************************/
/* */
/* Start OneNAND IPL */
ldr pc, =start_oneboot
-#endif /* #if !defined(CONFIG_ONENAND_IPL) */
+#endif /* CONFIG_PRELOADER */
#ifndef CONFIG_PRELOADER
/****************************************************************************/
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, #(CONFIG_SYS_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, #(CONFIG_SYS_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
.macro get_fiq_stack @ setup FIQ stack
ldr sp, FIQ_STACK_START
.endm
-#endif /* CONFIG_PRELOADER */
+#endif /* CONFIG_PRELOADER
/****************************************************************************/
do_hang:
ldr sp, _TEXT_BASE /* use 32 words abort stack */
bl hang /* hang and never return */
-#else /* !CONFIG_PRELOADER */
+#else
.align 5
undefined_instruction:
get_bad_stack
/* */
/****************************************************************************/
/* Operating System Timer */
-OSTIMER_BASE: .word 0x40a00000
-#define OSMR3 0x0C
-#define OSCR 0x10
-#define OWER 0x18
-#define OIER 0x1C
-
- .align 5
+.align 5
.globl reset_cpu
/* FIXME: this code is PXA250 specific. How is this handled on */
/* We set OWE:WME (watchdog enable) and wait until timeout happens */
- ldr r0, OSTIMER_BASE
- ldr r1, [r0, #OWER]
+ ldr r0, =OWER
+ ldr r1, [r0]
orr r1, r1, #0x0001 /* bit0: WME */
- str r1, [r0, #OWER]
+ str r1, [r0]
/* OS timer does only wrap every 1165 seconds, so we have to set */
/* the match register as well. */
- ldr r1, [r0, #OSCR] /* read OS timer */
+ ldr r0, =OSCR
+ ldr r1, [r0] /* read OS timer */
add r1, r1, #0x800 /* let OSMR3 match after */
add r1, r1, #0x800 /* 4096*(1/3.6864MHz)=1ms */
- str r1, [r0, #OSMR3]
+ ldr r0, =OSMR3
+ str r1, [r0]
reset_endless:
.word (__base << 20) | 0xc12
.set __base, __base + 1
.endr
-#endif
+#endif /* CONFIG_PRELOADER */
projects / platform / kernel / u-boot.git / blobdiff