* (C) Copyright 2002
* Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
*
- * 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 <config.h>
* We now have CONFIG_SYS_CAR_SIZE bytes of Cache-As-RAM (or SRAM,
* or fully initialised SDRAM - we really don't care which)
* starting at CONFIG_SYS_CAR_ADDR to be used as a temporary stack
+ * and early malloc area.
+ *
+ * Stack grows down from top of CAR. We have:
+ *
+ * top-> CONFIG_SYS_CAR_ADDR + CONFIG_SYS_CAR_SIZE
+ * global_data
+ * x86 global descriptor table
+ * early malloc area
+ * stack
+ * bottom-> CONFIG_SYS_CAR_ADDR
*/
/* Stack grows down from top of CAR */
/* Align global data to 16-byte boundary */
andl $0xfffffff0, %esp
- /* Setup first parameter to setup_gdt */
+ /* Zero the global data since it won't happen later */
+ xorl %eax, %eax
+ movl $GENERATED_GBL_DATA_SIZE, %ecx
+ movl %esp, %edi
+ rep stosb
+
+ /* Setup first parameter to setup_gdt, pointer to global_data */
movl %esp, %eax
/* Reserve space for global descriptor table */
/* Align temporary global descriptor table to 16-byte boundary */
andl $0xfffffff0, %esp
+ movl %esp, %ecx
- /* Set second parameter to setup_gdt */
- movl %esp, %edx
+#if defined(CONFIG_SYS_MALLOC_F_LEN)
+ subl $CONFIG_SYS_MALLOC_F_LEN, %esp
+ movl %eax, %edx
+ addl $GD_MALLOC_BASE, %edx
+ movl %esp, (%edx)
+#endif
- /* gd->gd_addr = gd (Required to allow gd->xyz to work) */
- movl %eax, (%eax)
+ /* Align temporary global descriptor table to 16-byte boundary */
+ andl $0xfffffff0, %esp
+
+ /* Set second parameter to setup_gdt */
+ movl %ecx, %edx
/* Setup global descriptor table so gd->xyz works */
call setup_gdt
/* Set parameter to board_init_f() to boot flags */
xorl %eax, %eax
- movw %bx, %ax
/* Enter, U-boot! */
call board_init_f
/* Set second parameter to setup_gdt */
movl %esp, %edx
- /* gd->gd_addr = gd (Required to allow gd->xyz to work) */
- movl %eax, (%eax)
-
/* Setup global descriptor table so gd->xyz works */
call setup_gdt