3d3f78d752
x86 calls machine_shutdown() from the various machine_*() calls which take the machine down ready for halting, restarting, etc, and uses this to bring the system safely to a point where those actions can be performed. Such actions are stopping the secondary CPUs. So, change the ARM implementation of these to reflect what x86 does. This solves kexec problems on ARM SMP platforms, where the secondary CPUs were left running across the kexec call. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/*
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* machine_kexec.c - handle transition of Linux booting another kernel
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*/
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#include <linux/mm.h>
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#include <linux/kexec.h>
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#include <linux/delay.h>
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#include <linux/reboot.h>
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#include <linux/io.h>
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#include <asm/pgtable.h>
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#include <asm/pgalloc.h>
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#include <asm/mmu_context.h>
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#include <asm/cacheflush.h>
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#include <asm/mach-types.h>
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extern const unsigned char relocate_new_kernel[];
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extern const unsigned int relocate_new_kernel_size;
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extern void setup_mm_for_reboot(char mode);
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extern unsigned long kexec_start_address;
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extern unsigned long kexec_indirection_page;
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extern unsigned long kexec_mach_type;
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extern unsigned long kexec_boot_atags;
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/*
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* Provide a dummy crash_notes definition while crash dump arrives to arm.
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* This prevents breakage of crash_notes attribute in kernel/ksysfs.c.
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*/
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int machine_kexec_prepare(struct kimage *image)
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{
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return 0;
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}
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void machine_kexec_cleanup(struct kimage *image)
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{
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}
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void machine_crash_shutdown(struct pt_regs *regs)
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{
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}
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void machine_kexec(struct kimage *image)
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{
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unsigned long page_list;
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unsigned long reboot_code_buffer_phys;
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void *reboot_code_buffer;
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page_list = image->head & PAGE_MASK;
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/* we need both effective and real address here */
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reboot_code_buffer_phys =
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page_to_pfn(image->control_code_page) << PAGE_SHIFT;
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reboot_code_buffer = page_address(image->control_code_page);
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/* Prepare parameters for reboot_code_buffer*/
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kexec_start_address = image->start;
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kexec_indirection_page = page_list;
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kexec_mach_type = machine_arch_type;
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kexec_boot_atags = image->start - KEXEC_ARM_ZIMAGE_OFFSET + KEXEC_ARM_ATAGS_OFFSET;
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/* copy our kernel relocation code to the control code page */
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memcpy(reboot_code_buffer,
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relocate_new_kernel, relocate_new_kernel_size);
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flush_icache_range((unsigned long) reboot_code_buffer,
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(unsigned long) reboot_code_buffer + KEXEC_CONTROL_PAGE_SIZE);
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printk(KERN_INFO "Bye!\n");
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local_irq_disable();
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local_fiq_disable();
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setup_mm_for_reboot(0); /* mode is not used, so just pass 0*/
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flush_cache_all();
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cpu_proc_fin();
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flush_cache_all();
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cpu_reset(reboot_code_buffer_phys);
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}
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