projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| f07cb6a0 SS |
1 | /* |
| 2 | * Keystone SOC SMP platform code | |
| 3 | * | |
| 4 | * Copyright 2013 Texas Instruments, Inc. | |
| 5 | * Cyril Chemparathy <cyril@ti.com> | |
| 6 | * Santosh Shilimkar <santosh.shillimkar@ti.com> | |
| 7 | * | |
| 8 | * Based on platsmp.c, Copyright (C) 2002 ARM Ltd. | |
| 9 | * | |
| 10 | * This program is free software; you can redistribute it and/or modify it | |
| 11 | * under the terms and conditions of the GNU General Public License, | |
| 12 | * version 2, as published by the Free Software Foundation. | |
| 13 | */ | |
| 14 | ||
| 15 | #include <linux/init.h> | |
| 16 | #include <linux/smp.h> | |
| 17 | #include <linux/io.h> | |
| 18 | ||
| 19 | #include <asm/smp_plat.h> | |
| 5eb3da72 SS |
20 | #include <asm/prom.h> |
| 21 | #include <asm/tlbflush.h> | |
| 22 | #include <asm/pgtable.h> | |
| f07cb6a0 SS |
23 | |
| 24 | #include "keystone.h" | |
| 25 | ||
| 8bd26e3a | 26 | static int keystone_smp_boot_secondary(unsigned int cpu, |
| f07cb6a0 SS |
27 | struct task_struct *idle) |
| 28 | { | |
| 5eb3da72 | 29 | unsigned long start = virt_to_idmap(&secondary_startup); |
| f07cb6a0 SS |
30 | int error; |
| 31 | ||
| 32 | pr_debug("keystone-smp: booting cpu %d, vector %08lx\n", | |
| 33 | cpu, start); | |
| 34 | ||
| 3aae7ab0 SS |
35 | error = keystone_cpu_smc(KEYSTONE_MON_CPU_UP_IDX, cpu, start); |
| 36 | if (error) | |
| 37 | pr_err("CPU %d bringup failed with %d\n", cpu, error); | |
| f07cb6a0 SS |
38 | |
| 39 | return error; | |
| 40 | } | |
| 41 | ||
| 5eb3da72 SS |
42 | #ifdef CONFIG_ARM_LPAE |
| 43 | static void __cpuinit keystone_smp_secondary_initmem(unsigned int cpu) | |
| 44 | { | |
| 45 | pgd_t *pgd0 = pgd_offset_k(0); | |
| 46 | cpu_set_ttbr(1, __pa(pgd0) + TTBR1_OFFSET); | |
| 47 | local_flush_tlb_all(); | |
| 48 | } | |
| 49 | #else | |
| 50 | static inline void __cpuinit keystone_smp_secondary_initmem(unsigned int cpu) | |
| 51 | {} | |
| 52 | #endif | |
| 53 | ||
| f07cb6a0 | 54 | struct smp_operations keystone_smp_ops __initdata = { |
| f07cb6a0 | 55 | .smp_boot_secondary = keystone_smp_boot_secondary, |
| 5eb3da72 | 56 | .smp_secondary_init = keystone_smp_secondary_initmem, |
| f07cb6a0 | 57 | }; |