| | 1 | /* |
| | 2 | * Copyright (C) 2013 Imagination Technologies |
| | 3 | * Author: Paul Burton <paul.burton@imgtec.com> |
| | 4 | * |
| | 5 | * Based on smp-cmp.c: |
| | 6 | * Copyright (C) 2007 MIPS Technologies, Inc. |
| | 7 | * Author: Chris Dearman (chris@mips.com) |
| | 8 | * |
| | 9 | * This program is free software; you can redistribute it and/or modify it |
| | 10 | * under the terms of the GNU General Public License as published by the |
| | 11 | * Free Software Foundation; either version 2 of the License, or (at your |
| | 12 | * option) any later version. |
| | 13 | */ |
| | 14 | |
| | 15 | #include <linux/irqchip/mips-gic.h> |
| | 16 | #include <linux/printk.h> |
| | 17 | |
| | 18 | #include <asm/mips-cpc.h> |
| | 19 | #include <asm/smp-ops.h> |
| | 20 | |
| | 21 | void gic_send_ipi_single(int cpu, unsigned int action) |
| | 22 | { |
| | 23 | unsigned long flags; |
| | 24 | unsigned int intr; |
| | 25 | unsigned int core = cpu_data[cpu].core; |
| | 26 | |
| | 27 | pr_debug("CPU%d: %s cpu %d action %u status %08x\n", |
| | 28 | smp_processor_id(), __func__, cpu, action, read_c0_status()); |
| | 29 | |
| | 30 | local_irq_save(flags); |
| | 31 | |
| | 32 | switch (action) { |
| | 33 | case SMP_CALL_FUNCTION: |
| | 34 | intr = plat_ipi_call_int_xlate(cpu); |
| | 35 | break; |
| | 36 | |
| | 37 | case SMP_RESCHEDULE_YOURSELF: |
| | 38 | intr = plat_ipi_resched_int_xlate(cpu); |
| | 39 | break; |
| | 40 | |
| | 41 | default: |
| | 42 | BUG(); |
| | 43 | } |
| | 44 | |
| | 45 | gic_send_ipi(intr); |
| | 46 | |
| | 47 | if (mips_cpc_present() && (core != current_cpu_data.core)) { |
| | 48 | while (!cpumask_test_cpu(cpu, &cpu_coherent_mask)) { |
| | 49 | mips_cm_lock_other(core, 0); |
| | 50 | mips_cpc_lock_other(core); |
| | 51 | write_cpc_co_cmd(CPC_Cx_CMD_PWRUP); |
| | 52 | mips_cpc_unlock_other(); |
| | 53 | mips_cm_unlock_other(); |
| | 54 | } |
| | 55 | } |
| | 56 | |
| | 57 | local_irq_restore(flags); |
| | 58 | } |
| | 59 | |
| | 60 | void gic_send_ipi_mask(const struct cpumask *mask, unsigned int action) |
| | 61 | { |
| | 62 | unsigned int i; |
| | 63 | |
| | 64 | for_each_cpu(i, mask) |
| | 65 | gic_send_ipi_single(i, action); |
| | 66 | } |
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