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482cd90cd7
PCI_IOBASE is used to create VM maps for PCI I/O ports, it is required by generic PCI drivers to make memory mapped I/O range work. To deal with legacy drivers that have fixed I/O ports range we reserved 0x10000 in PCI_IOBASE, should be enough for i8259 i8042 stuff. Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
107 lines
2.2 KiB
C
107 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2009 Lemote Inc.
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* Author: Wu Zhangjin, wuzhangjin@gmail.com
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*/
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#include <linux/irqchip.h>
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#include <linux/logic_pio.h>
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#include <linux/memblock.h>
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#include <asm/bootinfo.h>
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#include <asm/traps.h>
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#include <asm/smp-ops.h>
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#include <asm/cacheflush.h>
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#include <asm/fw/fw.h>
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#include <loongson.h>
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#include <boot_param.h>
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#define NODE_ID_OFFSET_ADDR ((void __iomem *)TO_UNCAC(0x1001041c))
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u32 node_id_offset;
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static void __init mips_nmi_setup(void)
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{
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void *base;
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extern char except_vec_nmi[];
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base = (void *)(CAC_BASE + 0x380);
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memcpy(base, except_vec_nmi, 0x80);
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flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
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}
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void ls7a_early_config(void)
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{
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node_id_offset = ((readl(NODE_ID_OFFSET_ADDR) >> 8) & 0x1f) + 36;
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}
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void rs780e_early_config(void)
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{
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node_id_offset = 37;
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}
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void __init prom_init(void)
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{
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fw_init_cmdline();
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prom_init_env();
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/* init base address of io space */
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set_io_port_base(PCI_IOBASE);
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loongson_sysconf.early_config();
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prom_init_numa_memory();
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/* Hardcode to CPU UART 0 */
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setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE + 0x1e0), 0, 1024);
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register_smp_ops(&loongson3_smp_ops);
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board_nmi_handler_setup = mips_nmi_setup;
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}
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void __init prom_free_prom_memory(void)
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{
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}
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static __init void reserve_pio_range(void)
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{
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struct logic_pio_hwaddr *range;
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range = kzalloc(sizeof(*range), GFP_ATOMIC);
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if (!range)
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return;
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range->fwnode = &of_root->fwnode;
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range->size = MMIO_LOWER_RESERVED;
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range->hw_start = LOONGSON_PCIIO_BASE;
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range->flags = LOGIC_PIO_CPU_MMIO;
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if (logic_pio_register_range(range)) {
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pr_err("Failed to reserve PIO range for legacy ISA\n");
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goto free_range;
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}
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if (WARN(range->io_start != 0,
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"Reserved PIO range does not start from 0\n"))
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goto unregister;
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/*
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* i8259 would access I/O space, so mapping must be done here.
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* Please remove it when all drivers can be managed by logic_pio.
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*/
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ioremap_page_range(PCI_IOBASE, PCI_IOBASE + MMIO_LOWER_RESERVED,
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LOONGSON_PCIIO_BASE,
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pgprot_device(PAGE_KERNEL));
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return;
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unregister:
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logic_pio_unregister_range(range);
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free_range:
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kfree(range);
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}
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void __init arch_init_irq(void)
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{
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reserve_pio_range();
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irqchip_init();
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}
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