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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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5f595063af
Add .arm directive to headsmp.S to ensure that the
CPU starts in 32-bit ARM mode and the correct code
size is copied on smp bring-up.
This is related to the fix applied to SoCFPGA by
commit 5616f36713
("ARM: SoCFPGA: Fix secondary CPU startup in thumb2 kernel")
Additionally, start secondary CPUs on secondary_startup_arm
to automatically switch from ARM to thumb on a thumb kernel
Signed-off-by: Luis Araneda <luaraneda@gmail.com>
Suggested-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
24 lines
615 B
ArmAsm
24 lines
615 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2013 Steffen Trumtrar <s.trumtrar@pengutronix.de>
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* Copyright (c) 2012-2013 Xilinx
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*/
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#include <linux/linkage.h>
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#include <linux/init.h>
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#include <asm/assembler.h>
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.arm
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ENTRY(zynq_secondary_trampoline)
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ARM_BE8(setend be) @ ensure we are in BE8 mode
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ldr r0, zynq_secondary_trampoline_jump
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ARM_BE8(rev r0, r0)
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bx r0
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.globl zynq_secondary_trampoline_jump
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zynq_secondary_trampoline_jump:
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/* Space for jumping address */
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.word 0 /* cpu 1 */
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.globl zynq_secondary_trampoline_end
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zynq_secondary_trampoline_end:
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ENDPROC(zynq_secondary_trampoline)
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