1 // SPDX-License-Identifier: GPL-2.0-only
3  *  ARM64 Specific Low-Level ACPI Boot Support
5  *  Copyright (C) 2013-2014, Linaro Ltd.
16 #include <linux/arm-smccc.h>
19 #include <linux/efi-bgrt.h>
54 		return -EINVAL;  in parse_acpi()
66 		return -EINVAL;	/* Core will print when we return error */  in parse_acpi()
122  * acpi_fadt_sanity_check() - Check FADT presence and carry out sanity
136 	 * and carry out revision and ACPI HW reduced compliance tests  in acpi_fadt_sanity_check()
143 		return -ENODEV;  in acpi_fadt_sanity_check()
149 	 * Revision in table header is the FADT Major revision, and there  in acpi_fadt_sanity_check()
150 	 * is a minor revision of FADT which was introduced by ACPI 5.1,  in acpi_fadt_sanity_check()
151 	 * we only deal with ACPI 5.1 or newer revision to get GIC and SMP  in acpi_fadt_sanity_check()
154 	if (table->revision < 5 ||  in acpi_fadt_sanity_check()
155 	   (table->revision == 5 && fadt->minor_revision < 1)) {  in acpi_fadt_sanity_check()
156 		pr_err(FW_BUG "Unsupported FADT revision %d.%d, should be 5.1+\n",  in acpi_fadt_sanity_check()
157 		       table->revision, fadt->minor_revision);  in acpi_fadt_sanity_check()
159 		if (!fadt->arm_boot_flags) {  in acpi_fadt_sanity_check()
160 			ret = -EINVAL;  in acpi_fadt_sanity_check()
166 	if (!(fadt->flags & ACPI_FADT_HW_REDUCED)) {  in acpi_fadt_sanity_check()
168 		ret = -EINVAL;  in acpi_fadt_sanity_check()
184  *	3. check ACPI FADT revision
185  *	4. check ACPI FADT HW reduced flag
187  * We can parse ACPI boot-time tables such as MADT after
192  * - ACPI tables are initialized and sanity checks passed
193  * - acpi=force was passed in the command line and ACPI was not disabled
202 	 * - ACPI has been disabled explicitly (acpi=off), or  in acpi_boot_table_init()
203 	 * - the device tree is not empty (it has more than just a /chosen node,  in acpi_boot_table_init()
240 				((struct acpi_table_facs *)facs)->hardware_signature;  in acpi_boot_table_init()
264 	 * Although UEFI specifies the use of Normal Write-through for  in __acpi_get_writethrough_mem_attribute()
267 	 * purpose, emit a warning and use Normal Non-cacheable instead.  in __acpi_get_writethrough_mem_attribute()
269 	pr_warn_once("No MAIR allocation for EFI_MEMORY_WT; treating as Normal Non-cacheable\n");  in __acpi_get_writethrough_mem_attribute()
304 		u64 end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT);  in acpi_os_ioremap()
306 		if (phys < md->phys_addr || phys >= end)  in acpi_os_ioremap()
325 		switch (region->type) {  in acpi_os_ioremap()
372 			if (region->attribute & EFI_MEMORY_WB)  in acpi_os_ioremap()
374 			else if (region->attribute & EFI_MEMORY_WC)  in acpi_os_ioremap()
376 			else if (region->attribute & EFI_MEMORY_WT)  in acpi_os_ioremap()
391 	int err = -ENOENT;  in apei_claim_sea()
416 	 * APEI NMI-like notifications are deferred to irq_work. Unless  in apei_claim_sea()
417 	 * we interrupted irqs-masked code, we can do that now.  in apei_claim_sea()
427 			err = -EINPROGRESS;  in apei_claim_sea()