MIPS: Loongson64: Define PCI_IOBASE (482cd90c) · Commits · 戴 / test

arch/mips/include/asm/mach-loongson64/spaces.h

+8 −0

Original line number	Diff line number	Diff line
		@@ -6,5 +6,13 @@
		#define CAC_BASE _AC(0x9800000000000000, UL)
		#endif /* CONFIG_64BIT */

		/* Skip 128k to trap NULL pointer dereferences */
		#define PCI_IOBASE _AC(0xc000000000000000 + SZ_128K, UL)
		#define PCI_IOSIZE SZ_16M
		#define MAP_BASE (PCI_IOBASE + PCI_IOSIZE)

		/* Reserved at the start of PCI_IOBASE for legacy drivers */
		#define MMIO_LOWER_RESERVED 0x10000

		#include <asm/mach-generic/spaces.h>
		#endif

+40 −2

Original line number	Diff line number	Diff line
		@@ -5,6 +5,7 @@
		*/

		#include <linux/irqchip.h>
		#include <linux/logic_pio.h>
		#include <linux/memblock.h>
		#include <asm/bootinfo.h>
		#include <asm/traps.h>
		@@ -45,8 +46,7 @@ void __init prom_init(void)
		prom_init_env();

		/* init base address of io space */
		set_io_port_base((unsigned long)
		ioremap(LOONGSON_PCIIO_BASE, LOONGSON_PCIIO_SIZE));
		set_io_port_base(PCI_IOBASE);

		loongson_sysconf.early_config();

		@@ -63,7 +63,45 @@ void __init prom_free_prom_memory(void)
		{
		}

		static __init void reserve_pio_range(void)
		{
		struct logic_pio_hwaddr *range;

		range = kzalloc(sizeof(*range), GFP_ATOMIC);
		if (!range)
		return;

		range->fwnode = &of_root->fwnode;
		range->size = MMIO_LOWER_RESERVED;
		range->hw_start = LOONGSON_PCIIO_BASE;
		range->flags = LOGIC_PIO_CPU_MMIO;

		if (logic_pio_register_range(range)) {
		pr_err("Failed to reserve PIO range for legacy ISA\n");
		goto free_range;
		}

		if (WARN(range->io_start != 0,
		"Reserved PIO range does not start from 0\n"))
		goto unregister;

		/*
		* i8259 would access I/O space, so mapping must be done here.
		* Please remove it when all drivers can be managed by logic_pio.
		*/
		ioremap_page_range(PCI_IOBASE, PCI_IOBASE + MMIO_LOWER_RESERVED,
		LOONGSON_PCIIO_BASE,
		pgprot_device(PAGE_KERNEL));

		return;
		unregister:
		logic_pio_unregister_range(range);
		free_range:
		kfree(range);
		}

		void __init arch_init_irq(void)
		{
		reserve_pio_range();
		irqchip_init();
		}