* Michal SIMEK <monstr@monstr.eu>
* Yasushi SHOJI <yashi@atmark-techno.com>
*
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <asm-offsets.h>
*/
mts rmsr, r0 /* disable cache */
+
+ addi r8, r0, __end
+ mts rslr, r8
+#if defined(CONFIG_SPL_BUILD)
+ addi r1, r0, CONFIG_SPL_STACK_ADDR
+ mts rshr, r1
+ addi r1, r1, -4 /* Decrement SP to top of memory */
+#else
addi r1, r0, CONFIG_SYS_INIT_SP_OFFSET
+ mts rshr, r1
addi r1, r1, -4 /* Decrement SP to top of memory */
/* Find-out if u-boot is running on BIG/LITTLE endian platform
sh r7, r0, r8
rsubi r8, r10, 0x26
sh r6, r0, r8
+#endif /* BUILD_SPL */
+
+ /* Flush cache before enable cache */
+ addik r5, r0, 0
+ addik r6, r0, XILINX_DCACHE_BYTE_SIZE
+ bralid r15, flush_cache
+ nop
/* enable instruction and data cache */
mfs r12, rmsr
- ori r12, r12, 0xa0
+ ori r12, r12, 0x1a0
mts rmsr, r12
clear_bss:
cmp r6, r5, r4 /* check if we have reach the end */
bnei r6, 2b
3: /* jumping to board_init */
- brai board_init
+#ifndef CONFIG_SPL_BUILD
+ or r5, r0, r0 /* flags - empty */
+ brai board_init_f
+#else
+ addi r31, r0, CONFIG_SYS_SPL_MALLOC_END
+ brai board_init_r
+#endif
1: bri 1b
+#ifndef CONFIG_SPL_BUILD
/*
* Read 16bit little endian
*/
rtsd r15, 8
or r0, r0, r0
.end out16
+
+/*
+ * Relocate u-boot
+ */
+ .text
+ .global relocate_code
+ .ent relocate_code
+ .align 2
+relocate_code:
+ /*
+ * r5 - start_addr_sp
+ * r6 - new_gd
+ * r7 - reloc_addr
+ */
+ addi r1, r5, 0 /* Start to use new SP */
+ addi r31, r6, 0 /* Start to use new GD */
+
+ add r23, r0, r7 /* Move reloc addr to r23 */
+ /* Relocate text and data - r12 temp value */
+ addi r21, r0, _start
+ addi r22, r0, __end - 4 /* Include BSS too */
+1: lwi r12, r21, 0 /* Load u-boot data */
+ swi r12, r23, 0 /* Write zero to loc */
+ addi r21, r21, 4 /* Increment to next loc - origin code */
+ cmp r12, r21, r22 /* Check if we have reach the end */
+ bneid r12, 1b
+ addi r23, r23, 4 /* Increment to next loc - relocate code */
+
+ /* R23 points to the base address. */
+ add r23, r0, r7 /* Move reloc addr to r23 */
+ addi r24, r0, CONFIG_SYS_TEXT_BASE /* Get reloc offset */
+ rsub r23, r24, r23 /* keep - this is already here gd->reloc_off */
+
+ addik r6, r0, 0x2 /* BIG/LITTLE endian offset */
+ lwi r7, r0, 0x28
+ swi r6, r0, 0x28 /* used first unused MB vector */
+ lbui r10, r0, 0x28 /* used first unused MB vector */
+ swi r7, r0, 0x28
+
+#ifdef CONFIG_SYS_USR_EXCEP
+ addik r6, r0, _exception_handler
+ addk r6, r6, r23 /* add offset */
+ sw r6, r1, r0
+ lhu r7, r1, r10
+ rsubi r8, r10, 0xa
+ sh r7, r0, r8
+ rsubi r8, r10, 0xe
+ sh r6, r0, r8
+#endif
+ addik r6, r0, _hw_exception_handler
+ addk r6, r6, r23 /* add offset */
+ sw r6, r1, r0
+ lhu r7, r1, r10
+ rsubi r8, r10, 0x22
+ sh r7, r0, r8
+ rsubi r8, r10, 0x26
+ sh r6, r0, r8
+
+ addik r6, r0, _interrupt_handler
+ addk r6, r6, r23 /* add offset */
+ sw r6, r1, r0
+ lhu r7, r1, r10
+ rsubi r8, r10, 0x12
+ sh r7, r0, r8
+ rsubi r8, r10, 0x16
+ sh r6, r0, r8
+
+ /* Check if GOT exist */
+ addik r21, r23, _got_start
+ addik r22, r23, _got_end
+ cmpu r12, r21, r22
+ beqi r12, 2f /* No GOT table - jump over */
+
+ /* Skip last 3 entries plus 1 because of loop boundary below */
+ addik r22, r22, -0x10
+
+ /* Relocate the GOT. */
+3: lw r12, r21, r0 /* Load entry */
+ addk r12, r12, r23 /* Add reloc offset */
+ sw r12, r21, r0 /* Save entry back */
+
+ cmpu r12, r21, r22 /* Check if this cross boundary */
+ bneid r12, 3b
+ addik r21. r21, 4
+
+ /* Update pointer to GOT */
+ mfs r20, rpc
+ addik r20, r20, _GLOBAL_OFFSET_TABLE_ + 8
+ addk r20, r20, r23
+
+ /* Flush caches to ensure consistency */
+ addik r5, r0, 0
+ addik r6, r0, XILINX_DCACHE_BYTE_SIZE
+ bralid r15, flush_cache
+ nop
+
+2: addi r5, r31, 0 /* gd is initialized in board_r.c */
+ addi r6, r0, CONFIG_SYS_TEXT_BASE
+ addi r12, r23, board_init_r
+ bra r12 /* Jump to relocated code */
+
+ .end relocate_code
+#endif
projects / people / ms / u-boot.git / blobdiff