diff options
Diffstat (limited to 'arch/loongarch/kernel/acpi.c')
| -rw-r--r-- | arch/loongarch/kernel/acpi.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/loongarch/kernel/acpi.c b/arch/loongarch/kernel/acpi.c index 1367ca759468..88ad24d1e729 100644 --- a/arch/loongarch/kernel/acpi.c +++ b/arch/loongarch/kernel/acpi.c @@ -16,6 +16,7 @@ #include <linux/memblock.h> #include <linux/of_fdt.h> #include <linux/serial_core.h> +#include <linux/vmalloc.h> #include <asm/io.h> #include <asm/numa.h> #include <asm/loongson.h> @@ -59,6 +60,33 @@ void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size) return ioremap_cache(phys, size); } +#define PIO_BASE (unsigned long)PCI_IOBASE +#define PIO_SIZE ALIGN(ISA_IOSIZE, PAGE_SIZE) + +static bool acpi_pio; + +/* Add PIO for early access */ +void acpi_add_early_pio(void) +{ + if (!acpi_disabled) { + acpi_pio = true; + vmap_page_range(PIO_BASE, PIO_BASE + PIO_SIZE, + LOONGSON_LIO_BASE, pgprot_device(PAGE_KERNEL)); + } +} + +/* Remove PIO for PCI register */ +void acpi_remove_early_pio(void) +{ + if (!acpi_pio) + return; + + if (!acpi_disabled) { + acpi_pio = false; + vunmap_range(PIO_BASE, PIO_BASE + PIO_SIZE); + } +} + #ifdef CONFIG_SMP static int set_processor_mask(u32 id, u32 pass) { |