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6061e65f95
For ACPI system we suppose the ISA/LPC PIO range is registered together with PCI root bridge. But the fact is there may be some early access to the ISA/LPC PIO range before ACPI PCI root register (most of them are due to abnormal BIOS). Unconditionally register the ISA/LPC PIO range usually causes ACPI PCI root register fail because of the address range confliction. So we add a pair of helpers: acpi_add_early_pio() to add PIO for early access, and acpi_remove_early_pio() to remove PIO before PCI root register. Since acpi_remove_early_pio() may be called multiple times, we add an acpi_pio flag to ensure PIO be removed only once. Cc: <stable@vger.kernel.org> Tested-by: Yuanzhen Gan <elysia-best@simplelinux.cn.eu.org> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Author: Jianmin Lv <lvjianmin@loongson.cn>
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* Huacai Chen <chenhuacai@loongson.cn>
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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*/
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#ifndef _ASM_LOONGARCH_ACPI_H
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#define _ASM_LOONGARCH_ACPI_H
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#include <asm/smp.h>
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#include <asm/suspend.h>
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#ifdef CONFIG_ACPI
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extern int acpi_strict;
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extern int acpi_disabled;
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extern int acpi_pci_disabled;
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extern int acpi_noirq;
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extern int pptt_enabled;
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#define acpi_os_ioremap acpi_os_ioremap
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void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size);
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static inline void disable_acpi(void)
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{
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acpi_disabled = 1;
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acpi_pci_disabled = 1;
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acpi_noirq = 1;
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}
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static inline bool acpi_has_cpu_in_madt(void)
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{
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return true;
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}
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#define MAX_CORE_PIC 2048
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extern struct list_head acpi_wakeup_device_list;
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extern struct acpi_madt_core_pic acpi_core_pic[MAX_CORE_PIC];
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extern void acpi_add_early_pio(void);
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extern void acpi_remove_early_pio(void);
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extern int __init parse_acpi_topology(void);
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#endif /* !CONFIG_ACPI */
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#define ACPI_TABLE_UPGRADE_MAX_PHYS ARCH_LOW_ADDRESS_LIMIT
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extern int loongarch_acpi_suspend(void);
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extern int (*acpi_suspend_lowlevel)(void);
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static inline unsigned long acpi_get_wakeup_address(void)
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{
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#ifdef CONFIG_SUSPEND
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return (unsigned long)loongarch_wakeup_start;
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#endif
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return 0UL;
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}
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#endif /* _ASM_LOONGARCH_ACPI_H */
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