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https://github.com/torvalds/linux
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4bf2a626dc
Lantiq uses a common kernel config for devices with 24Kc and 34Kc cores.
The changes made previously to add support for interrupts on all cores
work on 24Kc platforms with SMP disabled and 34Kc platforms with SMP
enabled. This patch fixes boot issues on Danube (single core 24Kc) with
SMP enabled.
Fixes: 730320fd77 ("MIPS: lantiq: enable all hardware interrupts on second VPE")
Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
117 lines
2.5 KiB
C
117 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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*
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* Copyright (C) 2010 John Crispin <john@phrozen.org>
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*/
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#include <linux/export.h>
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#include <linux/clk.h>
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#include <linux/memblock.h>
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#include <linux/of_fdt.h>
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#include <asm/bootinfo.h>
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#include <asm/time.h>
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#include <asm/prom.h>
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#include <lantiq.h>
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#include "prom.h"
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#include "clk.h"
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/* access to the ebu needs to be locked between different drivers */
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DEFINE_SPINLOCK(ebu_lock);
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EXPORT_SYMBOL_GPL(ebu_lock);
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/*
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* this struct is filled by the soc specific detection code and holds
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* information about the specific soc type, revision and name
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*/
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static struct ltq_soc_info soc_info;
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/*
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* These structs are used to override vsmp_init_secondary()
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*/
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#if defined(CONFIG_MIPS_MT_SMP)
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extern const struct plat_smp_ops vsmp_smp_ops;
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static struct plat_smp_ops lantiq_smp_ops;
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#endif
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const char *get_system_type(void)
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{
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return soc_info.sys_type;
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}
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int ltq_soc_type(void)
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{
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return soc_info.type;
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}
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static void __init prom_init_cmdline(void)
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{
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int argc = fw_arg0;
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char **argv = (char **) KSEG1ADDR(fw_arg1);
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int i;
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arcs_cmdline[0] = '\0';
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for (i = 0; i < argc; i++) {
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char *p = (char *) KSEG1ADDR(argv[i]);
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if (CPHYSADDR(p) && *p) {
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strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
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strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
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}
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}
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}
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void __init plat_mem_setup(void)
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{
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void *dtb;
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ioport_resource.start = IOPORT_RESOURCE_START;
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ioport_resource.end = IOPORT_RESOURCE_END;
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iomem_resource.start = IOMEM_RESOURCE_START;
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iomem_resource.end = IOMEM_RESOURCE_END;
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set_io_port_base((unsigned long) KSEG1);
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dtb = get_fdt();
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if (dtb == NULL)
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panic("no dtb found");
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/*
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* Load the devicetree. This causes the chosen node to be
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* parsed resulting in our memory appearing
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*/
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__dt_setup_arch(dtb);
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}
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#if defined(CONFIG_MIPS_MT_SMP)
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static void lantiq_init_secondary(void)
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{
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/*
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* MIPS CPU startup function vsmp_init_secondary() will only
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* enable some of the interrupts for the second CPU/VPE.
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*/
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set_c0_status(ST0_IM);
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}
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#endif
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void __init prom_init(void)
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{
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/* call the soc specific detetcion code and get it to fill soc_info */
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ltq_soc_detect(&soc_info);
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snprintf(soc_info.sys_type, LTQ_SYS_TYPE_LEN - 1, "%s rev %s",
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soc_info.name, soc_info.rev_type);
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soc_info.sys_type[LTQ_SYS_TYPE_LEN - 1] = '\0';
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pr_info("SoC: %s\n", soc_info.sys_type);
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prom_init_cmdline();
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#if defined(CONFIG_MIPS_MT_SMP)
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lantiq_smp_ops = vsmp_smp_ops;
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if (cpu_has_mipsmt)
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lantiq_smp_ops.init_secondary = lantiq_init_secondary;
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register_smp_ops(&lantiq_smp_ops);
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#endif
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}
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