1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (C) 2014-2015 Broadcom Corporation
12 #include <linux/irqchip/irq-bcm2836.h>
33 /* Name of device node property defining secondary boot register location */
34 #define OF_SECONDARY_BOOT	"secondary-boot-reg"
54 		return -ENXIO;  in scu_a9_enable()
61 		return -ENOENT;  in scu_a9_enable()
66 		pr_err("failed to remap config base (%lu/%u) for SCU\n",  in scu_a9_enable()
68 		return -ENOMEM;  in scu_a9_enable()
84 		pr_err("Failed to find device tree node for CPU%u\n", cpu);  in secondary_boot_addr_for()
91 		pr_err("required secondary boot register not specified for CPU%u\n",  in secondary_boot_addr_for()
106 		return -EINVAL;  in nsp_write_lut()
111 		pr_warn("unable to ioremap SKU-ROM LUT register for cpu %u\n", cpu);  in nsp_write_lut()
112 		return -ENOMEM;  in nsp_write_lut()
135 		pr_warn("failed to enable A9 SCU - disabling SMP\n");  in bcm_smp_prepare_cpus()
143  * secondary boot register.  When a core finds those bits contain its
144  * own core id, it performs initialization, including computing its boot
145  * address by clearing the boot register value's bottom two bits.  The
146  * core signals that it is beginning its execution by writing its boot
147  * address back to the secondary boot register, and finally jumps to
151  * - Encode the (hardware) CPU id with the bottom bits of the secondary
153  * - Write that value into the secondary boot register.
154  * - Generate an event to wake up the secondary CPU(s).
155  * - Wait for the secondary boot register to be re-written, which
170 		pr_err("bad cpu id (%u > %u)\n", cpu_id, BOOT_ADDR_CPUID_MASK);  in kona_boot_secondary()
171 		return -EINVAL;  in kona_boot_secondary()
175 		return -EINVAL;  in kona_boot_secondary()
180 		pr_err("unable to map boot register for cpu %u\n", cpu_id);  in kona_boot_secondary()
181 		return -ENOMEM;  in kona_boot_secondary()
201 		timeout = local_clock() - start_clock > SECONDARY_TIMEOUT_NS;  in kona_boot_secondary()
208 	pr_err("timeout waiting for cpu %u to start\n", cpu_id);  in kona_boot_secondary()
210 	return -ENXIO;  in kona_boot_secondary()
233 	name = "brcm,bcm23550-cdc";  in bcm23550_boot_secondary()
237 		return -ENODEV;  in bcm23550_boot_secondary()
245 		return -ENOMEM;  in bcm23550_boot_secondary()
248 	/* Boot the secondary core */  in bcm23550_boot_secondary()
291 	name = "brcm,bcm2836-l1-intc";  in bcm2836_boot_secondary()
295 		return -ENODEV;  in bcm2836_boot_secondary()
303 		return -ENOMEM;  in bcm2836_boot_secondary()
321 CPU_METHOD_OF_DECLARE(bcm_smp_bcm281xx, "brcm,bcm11351-cpu-method",
334 CPU_METHOD_OF_DECLARE(bcm_smp_nsp, "brcm,bcm-nsp-smp", &nsp_smp_ops);
339 CPU_METHOD_OF_DECLARE(bcm_smp_bcm2836, "brcm,bcm2836-smp", &bcm2836_smp_ops);