*************************************************************************
*/
+.globl _TEXT_BASE
_TEXT_BASE:
- .word TEXT_BASE
-
-.globl _armboot_start
-_armboot_start:
- .word _start
+ .word CONFIG_SYS_TEXT_BASE
/*
* 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_start_ofs
+_bss_start_ofs:
+ .word __bss_start - _start
+
+.globl _bss_end_ofs
+_bss_end_ofs:
+ .word _end - _start
+
+.globl _datarel_start_ofs
+_datarel_start_ofs:
+ .word __datarel_start - _start
+
+.globl _datarelrolocal_start_ofs
+_datarelrolocal_start_ofs:
+ .word __datarelrolocal_start - _start
-.globl _bss_end
-_bss_end:
- .word _end
+.globl _datarellocal_start_ofs
+_datarellocal_start_ofs:
+ .word __datarellocal_start - _start
+
+.globl _datarelro_start_ofs
+_datarelro_start_ofs:
+ .word __datarelro_start - _start
#ifdef CONFIG_USE_IRQ
/* IRQ stack memory (calculated at run-time) */
.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:
+ .word 0x0badc0de
+#endif
+
+#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
+
+#ifdef CONFIG_OMAP2420H4
+ /* 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 */
+ bl cpy_clk_code /* put dpll adjust code behind vectors */
+#endif
+ /* the mask ROM code should have PLL and others stable */
+#ifndef CONFIG_SKIP_LOWLEVEL_INIT
+ bl cpu_init_crit
+#endif
+
+/* Set stackpointer in internal RAM to call board_init_f */
+call_board_init_f:
+ ldr sp, =(CONFIG_SYS_INIT_SP_ADDR)
+ ldr r0,=0x00000000
+
+#ifdef CONFIG_NAND_SPL
+ bl nand_boot
+#else
+#ifdef CONFIG_ONENAND_IPL
+ bl start_oneboot
+#else
+ bl board_init_f
+#endif /* CONFIG_ONENAND_IPL */
+#endif /* CONFIG_NAND_SPL */
+
+/*------------------------------------------------------------------------------*/
+
+/*
+ * void relocate_code (addr_sp, gd, addr_moni)
+ *
+ * This "function" does not return, instead it continues in RAM
+ * after relocating the monitor code.
+ *
+ */
+ .globl relocate_code
+relocate_code:
+ 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_ofs
+ add r2, r0, r3 /* r2 <- source end address */
+ 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] */
+ cmp r0, r2 /* until source end address [r2] */
+ blo copy_loop
+
+#ifndef CONFIG_PRELOADER
+ /*
+ * 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 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
+ ble fixloop
+#endif
+#endif /* #ifndef CONFIG_SKIP_RELOCATE_UBOOT */
+
+clear_bss:
+#ifndef CONFIG_PRELOADER
+ ldr r0, _bss_start_ofs
+ ldr r1, _bss_end_ofs
+ ldr r3, _TEXT_BASE /* Text base */
+ mov r4, r7 /* reloc addr */
+ add r0, r0, r4
+ add r1, r1, r4
+ mov r2, #0x00000000 /* clear */
+
+clbss_l:str r2, [r0] /* clear loop... */
+ add r0, r0, #4
+ cmp r0, r1
+ bne clbss_l
+#endif /* #ifndef CONFIG_PRELOADER */
+
+/*
+ * We are done. Do not return, instead branch to second part of board
+ * initialization, now running from RAM.
+ */
+#ifdef CONFIG_NAND_SPL
+ 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, _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 pc, lr
+
+_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
*/
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 addreee [r2] */
- ble copy_loop
+ cmp r0, r2 /* until source end address [r2] */
+ blo copy_loop
#endif /* CONFIG_SKIP_RELOCATE_UBOOT */
/* Set up the 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 */
+ 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
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 */
+#endif /* #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) */
+
/*
*************************************************************************
*
sub sp, sp, #S_FRAME_SIZE @ carve out a frame on current user stack
stmia sp, {r0 - r12} @ Save user registers (now in svc mode) r0-r12
- ldr r2, _armboot_start
+#if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
+ ldr r2, IRQ_STACK_START_IN @ set base 2 words into abort stack
+#else
+ 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
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
- ldr r13, _armboot_start @ setup our mode stack (enter in banked mode)
- sub r13, r13, #(CONFIG_SYS_MALLOC_LEN) @ move past malloc pool
+#if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
+ ldr r13, IRQ_STACK_START_IN @ setup our mode stack (enter in banked mode)
+#else
+ 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
str lr, [r13] @ save caller lr in position 0 of saved stack
mrs lr, spsr @ get the spsr
.macro get_bad_stack_swi
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, IRQ_STACK_START_IN @ get data regions start
+#else
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 spots for abort stack
+#endif
str lr, [r0] @ save caller lr in position 0 of saved stack
mrs r0, spsr @ get the spsr
str lr, [r0, #4] @ save spsr in position 1 of saved stack
.align 5
.global arm1136_cache_flush
arm1136_cache_flush:
+#if !defined(CONFIG_SYS_NO_ICACHE)
mcr p15, 0, r1, c7, c5, 0 @ invalidate I cache
+#endif
+#if !defined(CONFIG_SYS_NO_DCACHE)
+ mcr p15, 0, r1, c7, c14, 0 @ invalidate D cache
+#endif
mov pc, lr @ back to caller
#endif /* CONFIG_PRELOADER */
projects / karo-tx-uboot.git / blobdiff