#include <asm-offsets.h>
#include <config.h>
#include <version.h>
+#include <asm/system.h>
+#include <linux/linkage.h>
.globl _start
_start: b reset
ldr pc, _not_used
ldr pc, _irq
ldr pc, _fiq
-
+#ifdef CONFIG_SPL_BUILD
+_undefined_instruction: .word _undefined_instruction
+_software_interrupt: .word _software_interrupt
+_prefetch_abort: .word _prefetch_abort
+_data_abort: .word _data_abort
+_not_used: .word _not_used
+_irq: .word _irq
+_fiq: .word _fiq
+_pad: .word 0x12345678 /* now 16*4=64 */
+#else
_undefined_instruction: .word undefined_instruction
_software_interrupt: .word software_interrupt
_prefetch_abort: .word prefetch_abort
_irq: .word irq
_fiq: .word fiq
_pad: .word 0x12345678 /* now 16*4=64 */
+#endif /* CONFIG_SPL_BUILD */
+
.global _end_vect
_end_vect:
.globl _TEXT_BASE
_TEXT_BASE:
+#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_TEXT_BASE)
+ .word CONFIG_SPL_TEXT_BASE
+#else
.word CONFIG_SYS_TEXT_BASE
+#endif
/*
* These are defined in the board-specific linker script.
.globl _bss_end_ofs
_bss_end_ofs:
- .word __bss_end__ - _start
+ .word __bss_end - _start
.globl _end_ofs
_end_ofs:
*/
reset:
+ bl save_boot_params
/*
- * set the cpu to SVC32 mode
+ * disable interrupts (FIQ and IRQ), also set the cpu to SVC32 mode,
+ * except if in HYP mode already
*/
mrs r0, cpsr
- bic r0, r0, #0x1f
- orr r0, r0, #0xd3
+ and r1, r0, #0x1f @ mask mode bits
+ teq r1, #0x1a @ test for HYP mode
+ bicne r0, r0, #0x1f @ clear all mode bits
+ orrne r0, r0, #0x13 @ set SVC mode
+ orr r0, r0, #0xc0 @ disable FIQ and IRQ
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 */
+/*
+ * Setup vector:
+ * (OMAP4 spl TEXT_BASE is not 32 byte aligned.
+ * Continue to use ROM code vector only in OMAP4 spl)
+ */
+#if !(defined(CONFIG_OMAP44XX) && defined(CONFIG_SPL_BUILD))
+ /* Set V=0 in CP15 SCTRL register - for VBAR to point to vector */
+ mrc p15, 0, r0, c1, c0, 0 @ Read CP15 SCTRL Register
+ bic r0, #CR_V @ V = 0
+ mcr p15, 0, r0, c1, c0, 0 @ Write CP15 SCTRL Register
+
+ /* Set vector address in CP15 VBAR register */
+ ldr r0, =_start
+ mcr p15, 0, r0, c12, c0, 0 @Set VBAR
#endif
+
/* the mask ROM code should have PLL and others stable */
#ifndef CONFIG_SKIP_LOWLEVEL_INIT
+ bl cpu_init_cp15
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)
- bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
- ldr r0,=0x00000000
- bl board_init_f
+ bl _main
/*------------------------------------------------------------------------------*/
+#ifndef CONFIG_SPL_BUILD
/*
- * void relocate_code (addr_sp, gd, addr_moni)
- *
- * This "function" does not return, instead it continues in RAM
- * after relocating the monitor code.
+ * void relocate_code(addr_moni)
*
+ * This function relocates 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 */
-
- /* Set up the stack */
-stack_setup:
- mov sp, r4
+ENTRY(relocate_code)
+ mov r6, r0 /* save addr of destination */
adr r0, _start
-#ifndef CONFIG_PRELOADER
- cmp r0, r6
- beq clear_bss /* skip relocation */
-#endif
+ subs r9, r6, r0 /* r9 <- relocation offset */
+ beq relocate_done /* skip relocation */
mov r1, r6 /* r1 <- scratch for copy_loop */
- ldr r3, _bss_start_ofs
+ ldr r3, _image_copy_end_ofs
add r2, r0, r3 /* r2 <- source end address */
copy_loop:
- ldmia r0!, {r9-r10} /* copy from source address [r0] */
- stmia r1!, {r9-r10} /* copy to target address [r1] */
+ ldmia r0!, {r10-r11} /* copy from source address [r0] */
+ stmia r1!, {r10-r11} /* 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, 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 */
cmp r2, r3
blo fixloop
-clear_bss:
- ldr r0, _bss_start_ofs
- ldr r1, _bss_end_ofs
- mov r4, r6 /* 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 */
+relocate_done:
-/*
- * We are done. Do not return, instead branch to second part of board
- * initialization, now running from RAM.
- */
-jump_2_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, r6 /* dest_addr */
- /* jump to it ... */
- mov pc, lr
-
-_board_init_r_ofs:
- .word board_init_r - _start
+ bx lr
+_image_copy_end_ofs:
+ .word __image_copy_end - _start
_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
+ENDPROC(relocate_code)
+
+#endif
+
+ENTRY(c_runtime_cpu_setup)
+/*
+ * If I-cache is enabled invalidate it
+ */
+#ifndef CONFIG_SYS_ICACHE_OFF
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate icache
+ mcr p15, 0, r0, c7, c10, 4 @ DSB
+ mcr p15, 0, r0, c7, c5, 4 @ ISB
+#endif
+/*
+ * Move vector table
+ */
+ /* Set vector address in CP15 VBAR register */
+ ldr r0, =_start
+ mcr p15, 0, r0, c12, c0, 0 @Set VBAR
+
+ bx lr
+
+ENDPROC(c_runtime_cpu_setup)
/*************************************************************************
*
- * CPU_init_critical registers
+ * void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3)
+ * __attribute__((weak));
*
- * setup important registers
- * setup memory timing
+ * Stack pointer is not yet initialized at this moment
+ * Don't save anything to stack even if compiled with -O0
+ *
+ *************************************************************************/
+ENTRY(save_boot_params)
+ bx lr @ back to my caller
+ENDPROC(save_boot_params)
+ .weak save_boot_params
+
+/*************************************************************************
+ *
+ * cpu_init_cp15
+ *
+ * Setup CP15 registers (cache, MMU, TLBs). The I-cache is turned on unless
+ * CONFIG_SYS_ICACHE_OFF is defined.
*
*************************************************************************/
-cpu_init_crit:
+ENTRY(cpu_init_cp15)
/*
* Invalidate L1 I/D
*/
mov r0, #0 @ set up for MCR
mcr p15, 0, r0, c8, c7, 0 @ invalidate TLBs
mcr p15, 0, r0, c7, c5, 0 @ invalidate icache
+ mcr p15, 0, r0, c7, c5, 6 @ invalidate BP array
+ mcr p15, 0, r0, c7, c10, 4 @ DSB
+ mcr p15, 0, r0, c7, c5, 4 @ ISB
/*
* disable MMU stuff and caches
bic r0, r0, #0x00002000 @ clear bits 13 (--V-)
bic r0, r0, #0x00000007 @ clear bits 2:0 (-CAM)
orr r0, r0, #0x00000002 @ set bit 1 (--A-) Align
- orr r0, r0, #0x00000800 @ set bit 12 (Z---) BTB
+ orr r0, r0, #0x00000800 @ set bit 11 (Z---) BTB
+#ifdef CONFIG_SYS_ICACHE_OFF
+ bic r0, r0, #0x00001000 @ clear bit 12 (I) I-cache
+#else
+ orr r0, r0, #0x00001000 @ set bit 12 (I) I-cache
+#endif
mcr p15, 0, r0, c1, c0, 0
+#ifdef CONFIG_ARM_ERRATA_716044
+ mrc p15, 0, r0, c1, c0, 0 @ read system control register
+ orr r0, r0, #1 << 11 @ set bit #11
+ mcr p15, 0, r0, c1, c0, 0 @ write system control register
+#endif
+
+#ifdef CONFIG_ARM_ERRATA_742230
+ mrc p15, 0, r0, c15, c0, 1 @ read diagnostic register
+ orr r0, r0, #1 << 4 @ set bit #4
+ mcr p15, 0, r0, c15, c0, 1 @ write diagnostic register
+#endif
+
+#ifdef CONFIG_ARM_ERRATA_743622
+ mrc p15, 0, r0, c15, c0, 1 @ read diagnostic register
+ orr r0, r0, #1 << 6 @ set bit #6
+ mcr p15, 0, r0, c15, c0, 1 @ write diagnostic register
+#endif
+
+#ifdef CONFIG_ARM_ERRATA_751472
+ mrc p15, 0, r0, c15, c0, 1 @ read diagnostic register
+ orr r0, r0, #1 << 11 @ set bit #11
+ mcr p15, 0, r0, c15, c0, 1 @ write diagnostic register
+#endif
+
+ mov pc, lr @ back to my caller
+ENDPROC(cpu_init_cp15)
+
+#ifndef CONFIG_SKIP_LOWLEVEL_INIT
+/*************************************************************************
+ *
+ * CPU_init_critical registers
+ *
+ * setup important registers
+ * setup memory timing
+ *
+ *************************************************************************/
+ENTRY(cpu_init_crit)
/*
* Jump to board specific initialization...
* The Mask ROM will have already initialized
* basic memory. Go here to bump up clock rate and handle
* wake up conditions.
*/
- mov ip, lr @ persevere link reg across call
- bl lowlevel_init @ go setup pll,mux,memory
- mov lr, ip @ restore link
- mov pc, lr @ back to my caller
+ b lowlevel_init @ go setup pll,mux,memory
+ENDPROC(cpu_init_crit)
+#endif
+
+#ifndef CONFIG_SPL_BUILD
/*
*************************************************************************
*
@ spots for abort stack
str lr, [r0] @ save caller lr in position 0
@ of saved stack
- mrs r0, spsr @ get the spsr
+ mrs lr, spsr @ get the spsr
str lr, [r0, #4] @ save spsr in position 1 of
@ saved stack
+ ldr lr, [r0] @ restore lr
ldr r0, [r13] @ restore r0
add r13, r13, #4 @ pop stack entry
.endm
bad_save_user_regs
bl do_fiq
-#endif
+#endif /* CONFIG_USE_IRQ */
+#endif /* CONFIG_SPL_BUILD */
projects / karo-tx-uboot.git / blobdiff