cc53291521
Implementing the machine_crash_shutdown which will be called by crash_kexec (called in case of a panic, sysrq etc.). Disable the interrupts, shootdown cpus using debugger IPI and collect regs for all CPUs. elfcorehdr= specifies the location of elf core header stored by the crashed kernel. This command line option will be passed by the kexec-tools to capture kernel. savemaxmem= specifies the actual memory size that the first kernel has and this value will be used for dumping in the capture kernel. This command line option will be passed by the kexec-tools to capture kernel. Signed-off-by: Haren Myneni <haren@us.ibm.com> Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
223 lines
5.2 KiB
C
223 lines
5.2 KiB
C
/*
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* linux/arch/powerpc/platforms/cell/cell_setup.c
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*
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* Copyright (C) 1995 Linus Torvalds
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* Adapted from 'alpha' version by Gary Thomas
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* Modified by Cort Dougan (cort@cs.nmt.edu)
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* Modified by PPC64 Team, IBM Corp
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* Modified by Cell Team, IBM Deutschland Entwicklung GmbH
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#undef DEBUG
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#include <linux/config.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/stddef.h>
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#include <linux/unistd.h>
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#include <linux/slab.h>
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#include <linux/user.h>
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#include <linux/reboot.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/irq.h>
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#include <linux/seq_file.h>
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#include <linux/root_dev.h>
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#include <linux/console.h>
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#include <asm/mmu.h>
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#include <asm/processor.h>
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#include <asm/io.h>
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#include <asm/kexec.h>
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#include <asm/pgtable.h>
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#include <asm/prom.h>
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#include <asm/rtas.h>
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#include <asm/pci-bridge.h>
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#include <asm/iommu.h>
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#include <asm/dma.h>
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#include <asm/machdep.h>
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#include <asm/time.h>
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#include <asm/nvram.h>
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#include <asm/cputable.h>
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#include <asm/ppc-pci.h>
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#include <asm/irq.h>
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#include "interrupt.h"
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#include "iommu.h"
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#ifdef DEBUG
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#define DBG(fmt...) udbg_printf(fmt)
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#else
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#define DBG(fmt...)
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#endif
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void cell_show_cpuinfo(struct seq_file *m)
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{
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struct device_node *root;
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const char *model = "";
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root = of_find_node_by_path("/");
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if (root)
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model = get_property(root, "model", NULL);
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seq_printf(m, "machine\t\t: CHRP %s\n", model);
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of_node_put(root);
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}
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#ifdef CONFIG_SPARSEMEM
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static int __init find_spu_node_id(struct device_node *spe)
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{
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unsigned int *id;
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#ifdef CONFIG_NUMA
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struct device_node *cpu;
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cpu = spe->parent->parent;
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id = (unsigned int *)get_property(cpu, "node-id", NULL);
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#else
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id = NULL;
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#endif
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return id ? *id : 0;
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}
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static void __init cell_spuprop_present(struct device_node *spe,
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const char *prop, int early)
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{
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struct address_prop {
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unsigned long address;
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unsigned int len;
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} __attribute__((packed)) *p;
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int proplen;
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unsigned long start_pfn, end_pfn, pfn;
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int node_id;
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p = (void*)get_property(spe, prop, &proplen);
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WARN_ON(proplen != sizeof (*p));
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node_id = find_spu_node_id(spe);
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start_pfn = p->address >> PAGE_SHIFT;
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end_pfn = (p->address + p->len + PAGE_SIZE - 1) >> PAGE_SHIFT;
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/* We need to call memory_present *before* the call to sparse_init,
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but we can initialize the page structs only *after* that call.
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Thus, we're being called twice. */
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if (early)
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memory_present(node_id, start_pfn, end_pfn);
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else {
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/* As the pages backing SPU LS and I/O are outside the range
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of regular memory, their page structs were not initialized
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by free_area_init. Do it here instead. */
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for (pfn = start_pfn; pfn < end_pfn; pfn++) {
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struct page *page = pfn_to_page(pfn);
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set_page_links(page, ZONE_DMA, node_id, pfn);
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set_page_count(page, 0);
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reset_page_mapcount(page);
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SetPageReserved(page);
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INIT_LIST_HEAD(&page->lru);
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}
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}
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}
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static void __init cell_spumem_init(int early)
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{
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struct device_node *node;
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for (node = of_find_node_by_type(NULL, "spe");
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node; node = of_find_node_by_type(node, "spe")) {
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cell_spuprop_present(node, "local-store", early);
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cell_spuprop_present(node, "problem", early);
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cell_spuprop_present(node, "priv1", early);
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cell_spuprop_present(node, "priv2", early);
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}
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}
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#else
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static void __init cell_spumem_init(int early)
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{
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}
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#endif
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static void cell_progress(char *s, unsigned short hex)
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{
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printk("*** %04x : %s\n", hex, s ? s : "");
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}
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static void __init cell_setup_arch(void)
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{
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ppc_md.init_IRQ = iic_init_IRQ;
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ppc_md.get_irq = iic_get_irq;
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#ifdef CONFIG_SMP
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smp_init_cell();
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#endif
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/* init to some ~sane value until calibrate_delay() runs */
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loops_per_jiffy = 50000000;
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if (ROOT_DEV == 0) {
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printk("No ramdisk, default root is /dev/hda2\n");
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ROOT_DEV = Root_HDA2;
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}
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/* Find and initialize PCI host bridges */
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init_pci_config_tokens();
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find_and_init_phbs();
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spider_init_IRQ();
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#ifdef CONFIG_DUMMY_CONSOLE
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conswitchp = &dummy_con;
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#endif
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mmio_nvram_init();
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cell_spumem_init(0);
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}
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/*
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* Early initialization. Relocation is on but do not reference unbolted pages
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*/
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static void __init cell_init_early(void)
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{
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DBG(" -> cell_init_early()\n");
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hpte_init_native();
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cell_init_iommu();
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ppc64_interrupt_controller = IC_CELL_PIC;
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cell_spumem_init(1);
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DBG(" <- cell_init_early()\n");
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}
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static int __init cell_probe(int platform)
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{
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if (platform != PLATFORM_CELL)
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return 0;
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return 1;
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}
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struct machdep_calls __initdata cell_md = {
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.probe = cell_probe,
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.setup_arch = cell_setup_arch,
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.init_early = cell_init_early,
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.show_cpuinfo = cell_show_cpuinfo,
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.restart = rtas_restart,
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.power_off = rtas_power_off,
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.halt = rtas_halt,
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.get_boot_time = rtas_get_boot_time,
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.get_rtc_time = rtas_get_rtc_time,
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.set_rtc_time = rtas_set_rtc_time,
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.calibrate_decr = generic_calibrate_decr,
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.progress = cell_progress,
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#ifdef CONFIG_KEXEC
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.machine_kexec = default_machine_kexec,
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.machine_kexec_prepare = default_machine_kexec_prepare,
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.machine_crash_shutdown = default_machine_crash_shutdown,
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#endif
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};
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