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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2009 Lemote Inc.
* Author: Wu Zhangjin, wuzhangjin@gmail.com
*/
#include <linux/irqchip.h>
#include <linux/logic_pio.h>
#include <linux/memblock.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <asm/bootinfo.h>
#include <asm/traps.h>
#include <asm/smp-ops.h>
#include <asm/cacheflush.h>
#include <asm/fw/fw.h>
#include <loongson.h>
#include <boot_param.h>
#define NODE_ID_OFFSET_ADDR ((void __iomem *)TO_UNCAC(0x1001041c))
u32 node_id_offset;
static void __init mips_nmi_setup(void)
{
void *base;
base = (void *)(CAC_BASE + 0x380);
memcpy(base, except_vec_nmi, 0x80);
flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
}
void ls7a_early_config(void)
{
node_id_offset = ((readl(NODE_ID_OFFSET_ADDR) >> 8) & 0x1f) + 36;
}
void rs780e_early_config(void)
{
node_id_offset = 37;
}
void virtual_early_config(void)
{
node_id_offset = 44;
}
void __init szmem(unsigned int node)
{
u32 i, mem_type;
phys_addr_t node_id, mem_start, mem_size;
/* Otherwise come from DTB */
if (loongson_sysconf.fw_interface != LOONGSON_LEFI)
return;
/* Parse memory information and activate */
for (i = 0; i < loongson_memmap->nr_map; i++) {
node_id = loongson_memmap->map[i].node_id;
if (node_id != node)
continue;
mem_type = loongson_memmap->map[i].mem_type;
mem_size = loongson_memmap->map[i].mem_size;
/* Memory size comes in MB if MEM_SIZE_IS_IN_BYTES not set */
if (mem_size & MEM_SIZE_IS_IN_BYTES)
mem_size &= ~MEM_SIZE_IS_IN_BYTES;
else
mem_size = mem_size << 20;
mem_start = (node_id << 44) | loongson_memmap->map[i].mem_start;
switch (mem_type) {
case SYSTEM_RAM_LOW:
case SYSTEM_RAM_HIGH:
case UMA_VIDEO_RAM:
pr_info("Node %d, mem_type:%d\t[%pa], %pa bytes usable\n",
(u32)node_id, mem_type, &mem_start, &mem_size);
memblock_add_node(mem_start, mem_size, node,
MEMBLOCK_NONE);
break;
case SYSTEM_RAM_RESERVED:
case VIDEO_ROM:
case ADAPTER_ROM:
case ACPI_TABLE:
case SMBIOS_TABLE:
pr_info("Node %d, mem_type:%d\t[%pa], %pa bytes reserved\n",
(u32)node_id, mem_type, &mem_start, &mem_size);
memblock_reserve(mem_start, mem_size);
break;
/* We should not reserve VUMA_VIDEO_RAM as it overlaps with MMIO */
case VUMA_VIDEO_RAM:
default:
pr_info("Node %d, mem_type:%d\t[%pa], %pa bytes unhandled\n",
(u32)node_id, mem_type, &mem_start, &mem_size);
break;
}
}
/* Reserve vgabios if it comes from firmware */
if (loongson_sysconf.vgabios_addr)
memblock_reserve(virt_to_phys((void *)loongson_sysconf.vgabios_addr),
SZ_256K);
}
#ifndef CONFIG_NUMA
static void __init prom_init_memory(void)
{
szmem(0);
}
#endif
void __init prom_init(void)
{
fw_init_cmdline();
if (fw_arg2 == 0 || (fdt_magic(fw_arg2) == FDT_MAGIC)) {
loongson_sysconf.fw_interface = LOONGSON_DTB;
prom_dtb_init_env();
} else {
loongson_sysconf.fw_interface = LOONGSON_LEFI;
prom_lefi_init_env();
}
/* init base address of io space */
set_io_port_base(PCI_IOBASE);
if (loongson_sysconf.early_config)
loongson_sysconf.early_config();
#ifdef CONFIG_NUMA
prom_init_numa_memory();
#else
prom_init_memory();
#endif
/* Hardcode to CPU UART 0 */
if ((read_c0_prid() & PRID_IMP_MASK) == PRID_IMP_LOONGSON_64R)
setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE), 0, 1024);
else
setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE + 0x1e0), 0, 1024);
register_smp_ops(&loongson3_smp_ops);
board_nmi_handler_setup = mips_nmi_setup;
}
static int __init add_legacy_isa_io(struct fwnode_handle *fwnode, resource_size_t hw_start,
resource_size_t size)
{
int ret = 0;
struct logic_pio_hwaddr *range;
unsigned long vaddr;
range = kzalloc(sizeof(*range), GFP_ATOMIC);
if (!range)
return -ENOMEM;
range->fwnode = fwnode;
range->size = size = round_up(size, PAGE_SIZE);
range->hw_start = hw_start;
range->flags = LOGIC_PIO_CPU_MMIO;
ret = logic_pio_register_range(range);
if (ret) {
kfree(range);
return ret;
}
/* Legacy ISA must placed at the start of PCI_IOBASE */
if (range->io_start != 0) {
logic_pio_unregister_range(range);
kfree(range);
return -EINVAL;
}
vaddr = PCI_IOBASE + range->io_start;
ioremap_page_range(vaddr, vaddr + size, hw_start, pgprot_device(PAGE_KERNEL));
return 0;
}
static __init void reserve_pio_range(void)
{
struct device_node *np;
for_each_node_by_name(np, "isa") {
struct of_range range;
struct of_range_parser parser;
pr_info("ISA Bridge: %pOF\n", np);
if (of_range_parser_init(&parser, np)) {
pr_info("Failed to parse resources.\n");
of_node_put(np);
break;
}
for_each_of_range(&parser, &range) {
switch (range.flags & IORESOURCE_TYPE_BITS) {
case IORESOURCE_IO:
pr_info(" IO 0x%016llx..0x%016llx -> 0x%016llx\n",
range.cpu_addr,
range.cpu_addr + range.size - 1,
range.bus_addr);
if (add_legacy_isa_io(&np->fwnode, range.cpu_addr, range.size))
pr_warn("Failed to reserve legacy IO in Logic PIO\n");
break;
case IORESOURCE_MEM:
pr_info(" MEM 0x%016llx..0x%016llx -> 0x%016llx\n",
range.cpu_addr,
range.cpu_addr + range.size - 1,
range.bus_addr);
break;
}
}
}
}
void __init arch_init_irq(void)
{
reserve_pio_range();
irqchip_init();
}
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