riscv/kernel/acpi.c

1 // SPDX-License-Identifier: GPL-2.0-only
3  *  RISC-V Specific Low-Level ACPI Boot Support
5  *  Copyright (C) 2013-2014, Linaro Ltd.
12  *  Copyright (C) 2021-2023, Ventana Micro Systems Inc.
13  *	Author: Sunil V L <sunilvl@ventanamicro.com>
38 		return -EINVAL;  in parse_acpi()
48 		return -EINVAL;	/* Core will print when we return error */  in parse_acpi()
55  * acpi_fadt_sanity_check() - Check FADT presence and carry out sanity
68 	 * FADT is required on riscv; retrieve it to check its presence  in acpi_fadt_sanity_check()
76 		return -ENODEV;  in acpi_fadt_sanity_check()
86 	 * for HW_REDUCED flag. However, once RISC-V updates are released in  in acpi_fadt_sanity_check()
87 	 * the ACPI spec, we need to update this check for exact minor revision  in acpi_fadt_sanity_check()
89 	if (table->revision < 6 || (table->revision == 6 && fadt->minor_revision < 5))  in acpi_fadt_sanity_check()
91 		       table->revision, fadt->minor_revision);  in acpi_fadt_sanity_check()
93 	if (!(fadt->flags & ACPI_FADT_HW_REDUCED)) {  in acpi_fadt_sanity_check()
95 		ret = -EINVAL;  in acpi_fadt_sanity_check()
112  * We can parse ACPI boot-time tables such as MADT after
117  * - ACPI tables are initialized and sanity checks passed
118  * - acpi=force was passed in the command line and ACPI was not disabled
127 	 * - ACPI has been disabled explicitly (acpi=off), or  in acpi_boot_table_init()
128 	 * - firmware has not populated ACPI ptr in EFI system table  in acpi_boot_table_init()
161 	if (!(rintc->flags & ACPI_MADT_ENABLED))  in acpi_parse_madt_rintc()
164 	cpuid = riscv_hartid_to_cpuid(rintc->hart_id);  in acpi_parse_madt_rintc()
196 	return acpi_cpu_get_madt_rintc(cpu)->uid;  in get_acpi_id_for_cpu()
228 		u64 end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT);  in acpi_os_ioremap()
230 		if (phys < md->phys_addr || phys >= end)  in acpi_os_ioremap()
249 		switch (region->type) {  in acpi_os_ioremap()
295 			if (region->attribute & EFI_MEMORY_WB)  in acpi_os_ioremap()
297 			else if ((region->attribute & EFI_MEMORY_WC) ||  in acpi_os_ioremap()
298 				 (region->attribute & EFI_MEMORY_WT))  in acpi_os_ioremap()
311  * controller support is added in RISC-V ACPI.
327 	return -1;  in acpi_pci_bus_find_domain_nr()