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()
63 	else if (strcmp(arg, "nospcr") == 0) /* disable SPCR as default console */  in parse_acpi()
66 		return -EINVAL;	/* Core will print when we return error */  in parse_acpi()
94 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)  in __acpi_map_table()  argument
96 	if (!size)  in __acpi_map_table()
99 	return early_memremap(phys, size);  in __acpi_map_table()
102 void __init __acpi_unmap_table(void __iomem *map, unsigned long size)  in __acpi_unmap_table()  argument
104 	if (!map || !size)  in __acpi_unmap_table()
107 	early_memunmap(map, size);  in __acpi_unmap_table()
122  * acpi_fadt_sanity_check() - Check FADT presence and carry out sanity
143 		return -ENODEV;  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()
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()
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
204 	 * - ACPI has been disabled explicitly (acpi=off), or  in acpi_boot_table_init()
205 	 * - the device tree is not empty (it has more than just a /chosen node,  in acpi_boot_table_init()
242 				((struct acpi_table_facs *)facs)->hardware_signature;  in acpi_boot_table_init()
249 		 * to completely silence the serial console output, and only  in acpi_boot_table_init()
252 		 * behaviour, use acpi=nospcr to disable console in ACPI SPCR  in acpi_boot_table_init()
253 		 * table as default serial console.  in acpi_boot_table_init()
258 			pr_info("Use ACPI SPCR as default console: No\n");  in acpi_boot_table_init()
260 			pr_info("Use ACPI SPCR as default console: Yes\n");  in acpi_boot_table_init()
270 	 * Although UEFI specifies the use of Normal Write-through for  in __acpi_get_writethrough_mem_attribute()
273 	 * purpose, emit a warning and use Normal Non-cacheable instead.  in __acpi_get_writethrough_mem_attribute()
275 	pr_warn_once("No MAIR allocation for EFI_MEMORY_WT; treating as Normal Non-cacheable\n");  in __acpi_get_writethrough_mem_attribute()
301 void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size)  in acpi_os_ioremap()  argument
310 		u64 end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT);  in acpi_os_ioremap()
312 		if (phys < md->phys_addr || phys >= end)  in acpi_os_ioremap()
315 		if (phys + size > end) {  in acpi_os_ioremap()
331 		switch (region->type) {  in acpi_os_ioremap()
339 			    !memblock_is_region_memory(phys, size)) {  in acpi_os_ioremap()
368 			 * as read-only.  in acpi_os_ioremap()
388 			if (region->attribute & EFI_MEMORY_WB)  in acpi_os_ioremap()
390 			else if (region->attribute & EFI_MEMORY_WC)  in acpi_os_ioremap()
392 			else if (region->attribute & EFI_MEMORY_WT)  in acpi_os_ioremap()
396 	return ioremap_prot(phys, size, prot);  in acpi_os_ioremap()
407 	int err = -ENOENT;  in apei_claim_sea()
432 	 * APEI NMI-like notifications are deferred to irq_work. Unless  in apei_claim_sea()
433 	 * we interrupted irqs-masked code, we can do that now.  in apei_claim_sea()
443 			err = -EINPROGRESS;  in apei_claim_sea()
452 void arch_reserve_mem_area(acpi_physical_address addr, size_t size)  in arch_reserve_mem_area()  argument
454 	memblock_mark_nomap(addr, size);  in arch_reserve_mem_area()