#include <asm-offsets.h>
#include <config.h>
#include <version.h>
+#include <asm/system.h>
+#include <linux/linkage.h>
.globl _start
_start: b reset
.globl _TEXT_BASE
_TEXT_BASE:
+#ifndef CONFIG_SPL_BUILD
.word CONFIG_SYS_TEXT_BASE
-
-#ifdef CONFIG_TEGRA2
-/*
- * Tegra2 uses 2 separate CPUs - the AVP (ARM7TDMI) and the CPU (dual A9s).
- * U-Boot runs on the AVP first, setting things up for the CPU (PLLs,
- * muxes, clocks, clamps, etc.). Then the AVP halts, and expects the CPU
- * to pick up its reset vector, which points here.
- */
-.globl _armboot_start
-_armboot_start:
- .word _start
+#else
+ .word CONFIG_SPL_TEXT_BASE
#endif
/*
*/
reset:
+ bl save_boot_params
/*
* set the cpu to SVC32 mode
*/
orr r0, r0, #0xd3
msr cpsr,r0
-#if defined(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 */
+#if !defined(CONFIG_TEGRA2)
+/*
+ * 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
+#endif /* !Tegra2 */
+
/* the mask ROM code should have PLL and others stable */
#ifndef CONFIG_SKIP_LOWLEVEL_INIT
+ bl cpu_init_cp15
bl cpu_init_crit
#endif
call_board_init_f:
ldr sp, =(CONFIG_SYS_INIT_SP_ADDR)
bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
- ldr r0,=0x00000000
+ ldr r0, =0x00000000
bl board_init_f
/*------------------------------------------------------------------------------*/
* after relocating the monitor code.
*
*/
- .globl relocate_code
-relocate_code:
+ENTRY(relocate_code)
mov r4, r0 /* save addr_sp */
mov r5, r1 /* save addr of gd */
mov r6, r2 /* save addr of destination */
mov sp, r4
adr r0, _start
- cmp r0, r6
- moveq r9, #0 /* no relocation. relocation offset(r9) = 0 */
+ subs r9, r6, r0
beq clear_bss /* skip relocation */
mov r1, r6 /* r1 <- scratch for copy_loop */
ldr r3, _image_copy_end_ofs
/*
* fix .rel.dyn relocations
*/
- ldr r0, _TEXT_BASE /* r0 <- Text base */
+ adr r0, _start /* r0 <- beginning of code */
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 */
#endif
mov r2, #0x00000000 /* clear */
-clbss_l:str r2, [r0] /* clear loop... */
+clbss_l:
+ cmp r0, r1 /* clear loop... */
+ bhs clbss_e /* if reached end of bss, exit */
+ str r2, [r0]
add r0, r0, #4
- cmp r0, r1
- bne clbss_l
-
+ b clbss_l
+clbss_e:
+
/*
* We are done. Do not return, instead branch to second part of board
* initialization, now running from RAM.
_board_init_r_ofs:
.word board_init_r - _start
+ENDPROC(relocate_code)
-
-#ifndef CONFIG_SKIP_LOWLEVEL_INIT
/*************************************************************************
*
- * CPU_init_critical registers
+ * cpu_init_cp15
*
- * setup important registers
- * setup memory timing
+ * 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
*/
orr r0, r0, #0x00001000 @ set bit 12 (I) I-cache
#endif
mcr p15, 0, r0, c1, c0, 0
+ 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
+ mov ip, lr @ preserve link reg across call
bl lowlevel_init @ go setup pll,mux,memory
mov lr, ip @ restore link
mov pc, lr @ back to my caller
+ENDPROC(cpu_init_crit)
#endif
#ifndef CONFIG_SPL_BUILD
projects / karo-tx-uboot.git / blobdiff