57 lines
1.4 KiB
ArmAsm
57 lines
1.4 KiB
ArmAsm
/*
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* Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2007-2009 PetaLogix
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* Copyright (C) 2006 Atmark Techno, Inc.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/linkage.h>
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#include <asm/thread_info.h>
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#include <asm/page.h>
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.text
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ENTRY(_start)
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mfs r1, rmsr
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andi r1, r1, ~2
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mts rmsr, r1
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/* save fdt to kernel location */
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/* r7 stores pointer to fdt blob */
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beqi r7, no_fdt_arg
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or r11, r0, r0 /* incremment */
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ori r4, r0, TOPHYS(_fdt_start) /* save bram context */
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ori r3, r0, (0x4000 - 4)
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_copy_fdt:
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lw r12, r7, r11 /* r12 = r7 + r11 */
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sw r12, r4, r11 /* addr[r4 + r11] = r12 */
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addik r11, r11, 4 /* increment counting */
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bgtid r3, _copy_fdt /* loop for all entries */
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addik r3, r3, -4 /* descrement loop */
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no_fdt_arg:
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/* Initialize small data anchors */
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la r13, r0, _KERNEL_SDA_BASE_
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la r2, r0, _KERNEL_SDA2_BASE_
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/* Initialize stack pointer */
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la r1, r0, init_thread_union + THREAD_SIZE - 4
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/* Initialize r31 with current task address */
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la r31, r0, init_task
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/*
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* Call platform dependent initialize function.
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* Please see $(ARCH)/mach-$(SUBARCH)/setup.c for
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* the function.
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*/
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la r8, r0, machine_early_init
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brald r15, r8
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nop
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la r15, r0, machine_halt
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braid start_kernel
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nop
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