5eb3da7246
With late code patching updates for LPAE machines has merged now and memblock conversion from bootmem is on its way, Keystone can switch to the coherent memory address space which starts beyond 4GB boundary. The idmap alias needs are managed via virt_to_idmap() for boot purpose. Tested-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
/*
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* Keystone SOC SMP platform code
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*
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* Copyright 2013 Texas Instruments, Inc.
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* Cyril Chemparathy <cyril@ti.com>
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* Santosh Shilimkar <santosh.shillimkar@ti.com>
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*
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* Based on platsmp.c, Copyright (C) 2002 ARM Ltd.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/smp.h>
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#include <linux/io.h>
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#include <asm/smp_plat.h>
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#include <asm/prom.h>
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#include <asm/tlbflush.h>
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#include <asm/pgtable.h>
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#include "keystone.h"
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static int keystone_smp_boot_secondary(unsigned int cpu,
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struct task_struct *idle)
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{
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unsigned long start = virt_to_idmap(&secondary_startup);
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int error;
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pr_debug("keystone-smp: booting cpu %d, vector %08lx\n",
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cpu, start);
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error = keystone_cpu_smc(KEYSTONE_MON_CPU_UP_IDX, cpu, start);
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if (error)
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pr_err("CPU %d bringup failed with %d\n", cpu, error);
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return error;
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}
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#ifdef CONFIG_ARM_LPAE
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static void __cpuinit keystone_smp_secondary_initmem(unsigned int cpu)
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{
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pgd_t *pgd0 = pgd_offset_k(0);
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cpu_set_ttbr(1, __pa(pgd0) + TTBR1_OFFSET);
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local_flush_tlb_all();
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}
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#else
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static inline void __cpuinit keystone_smp_secondary_initmem(unsigned int cpu)
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{}
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#endif
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struct smp_operations keystone_smp_ops __initdata = {
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.smp_boot_secondary = keystone_smp_boot_secondary,
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.smp_secondary_init = keystone_smp_secondary_initmem,
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};
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