150 строки
3.1 KiB
C
150 строки
3.1 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 <linux/of.h>
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#include <linux/of_address.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 virtual_early_config(void)
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{
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node_id_offset = 44;
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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 int __init add_legacy_isa_io(struct fwnode_handle *fwnode, resource_size_t hw_start,
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resource_size_t size)
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{
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int ret = 0;
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struct logic_pio_hwaddr *range;
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unsigned long vaddr;
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range = kzalloc(sizeof(*range), GFP_ATOMIC);
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if (!range)
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return -ENOMEM;
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range->fwnode = fwnode;
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range->size = size;
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range->hw_start = hw_start;
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range->flags = LOGIC_PIO_CPU_MMIO;
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ret = logic_pio_register_range(range);
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if (ret) {
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kfree(range);
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return ret;
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}
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/* Legacy ISA must placed at the start of PCI_IOBASE */
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if (range->io_start != 0) {
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logic_pio_unregister_range(range);
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kfree(range);
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return -EINVAL;
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}
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vaddr = PCI_IOBASE + range->io_start;
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ioremap_page_range(vaddr, vaddr + size, hw_start, pgprot_device(PAGE_KERNEL));
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return 0;
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}
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static __init void reserve_pio_range(void)
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{
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struct device_node *np;
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for_each_node_by_name(np, "isa") {
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struct of_range range;
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struct of_range_parser parser;
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pr_info("ISA Bridge: %pOF\n", np);
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if (of_range_parser_init(&parser, np)) {
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pr_info("Failed to parse resources.\n");
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break;
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}
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for_each_of_range(&parser, &range) {
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switch (range.flags & IORESOURCE_TYPE_BITS) {
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case IORESOURCE_IO:
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pr_info(" IO 0x%016llx..0x%016llx -> 0x%016llx\n",
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range.cpu_addr,
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range.cpu_addr + range.size - 1,
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range.bus_addr);
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if (add_legacy_isa_io(&np->fwnode, range.cpu_addr, range.size))
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pr_warn("Failed to reserve legacy IO in Logic PIO\n");
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break;
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case IORESOURCE_MEM:
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pr_info(" MEM 0x%016llx..0x%016llx -> 0x%016llx\n",
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range.cpu_addr,
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range.cpu_addr + range.size - 1,
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range.bus_addr);
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break;
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}
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}
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}
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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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