AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-11 14:36:39 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity
ae57d0c609
linux_dsm_epyc7002/arch/arm/mach-zynq/headsmp.S

30 lines
857 B
ArmAsm
Raw Normal View History

arm: zynq: Add smp support Zynq is dual core Cortex A9 which starts always at zero. Using simple trampoline ensure long jump to secondary_startup code. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
2013-03-20 19:50:12 +07:00
/*
* Copyright (c) 2013 Steffen Trumtrar <s.trumtrar@pengutronix.de>
* Copyright (c) 2012-2013 Xilinx
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/linkage.h>
#include <linux/init.h>
ARM: zynq: Enable big-endian Enable ARCH_SUPPORTS_BIG_ENDIAN in Kconfig. zynq_secondary_trampoline is the first function that is called on secondary CPU. Reference: "ARM: mcpm: fix big endian issue in mcpm startup code" (sha1: 519ceb9fd10cd7e836d0aa97b2068cc9e97f463b) Fix early printk support. Based on: "ARM: pl01x debug code endian fix" (sha1: 76e3faf156fa95b6465e747d702b94faf67117fc) Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2014-04-11 20:05:56 +07:00
#include <asm/assembler.h>
arm: zynq: Add smp support Zynq is dual core Cortex A9 which starts always at zero. Using simple trampoline ensure long jump to secondary_startup code. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
2013-03-20 19:50:12 +07:00
ENTRY(zynq_secondary_trampoline)
ARM: zynq: Enable big-endian Enable ARCH_SUPPORTS_BIG_ENDIAN in Kconfig. zynq_secondary_trampoline is the first function that is called on secondary CPU. Reference: "ARM: mcpm: fix big endian issue in mcpm startup code" (sha1: 519ceb9fd10cd7e836d0aa97b2068cc9e97f463b) Fix early printk support. Based on: "ARM: pl01x debug code endian fix" (sha1: 76e3faf156fa95b6465e747d702b94faf67117fc) Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2014-04-11 20:05:56 +07:00
ARM_BE8(setend be) @ ensure we are in BE8 mode
ldr r0, zynq_secondary_trampoline_jump
ARM_BE8(rev r0, r0)
arm: zynq: Add smp support Zynq is dual core Cortex A9 which starts always at zero. Using simple trampoline ensure long jump to secondary_startup code. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
2013-03-20 19:50:12 +07:00
bx r0
.globl zynq_secondary_trampoline_jump
zynq_secondary_trampoline_jump:
/* Space for jumping address */
.word /* cpu 1 */
.globl zynq_secondary_trampoline_end
zynq_secondary_trampoline_end:
ENDPROC(zynq_secondary_trampoline)
arm: zynq: Invalidate L1 in secondary boot During boot, Linux initiates a clean-invalidate operation only, resulting in faulty data to be written to the memory system during resume. Therefore invalidate the L1 in the secondary boot path to avoid these issues. Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2013-10-31 23:10:15 +07:00
ENTRY(zynq_secondary_startup)
bl v7_invalidate_l1
b secondary_startup
ENDPROC(zynq_secondary_startup)
Reference in New Issue Copy Permalink