X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/ms2-kexec/blobdiff_plain/4e93cb000786b18ffd9929f33055cad2a7cebbcf..HEAD:/machine_kexec.c

diff --git a/machine_kexec.c b/machine_kexec.c
index 598ca61..9157d4c 100644
--- a/machine_kexec.c
+++ b/machine_kexec.c
@@ -18,11 +18,15 @@ extern const unsigned int relocate_new_kernel_size;
 
 extern void setup_mm_for_reboot(char mode);
 
+extern void v7_flush_kern_cache_all(void);
+
 extern unsigned long kexec_start_address;
 extern unsigned long kexec_indirection_page;
 extern unsigned long kexec_mach_type;
 extern unsigned long kexec_boot_atags;
 
+static atomic_t waiting_for_crash_ipi;
+
 /*
  * Provide a dummy crash_notes definition while crash dump arrives to arm.
  * This prevents breakage of crash_notes attribute in kernel/ksysfs.c.
@@ -37,21 +41,53 @@ void machine_kexec_cleanup(struct kimage *image)
 {
 }
 
-void machine_shutdown(void)
+void machine_crash_nonpanic_core(void *unused)
 {
+	struct pt_regs regs;
+
+	crash_setup_regs(&regs, NULL);
+	printk(KERN_DEBUG "CPU %u will stop doing anything useful since another CPU has crashed\n",
+	       smp_processor_id());
+	crash_save_cpu(&regs, smp_processor_id());
+	v7_flush_kern_cache_all();
+
+	atomic_dec(&waiting_for_crash_ipi);
+	while (1)
+		cpu_relax();
 }
 
 void machine_crash_shutdown(struct pt_regs *regs)
 {
+	unsigned long msecs;
+
+	local_irq_disable();
+
+	atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1);
+	smp_call_function(machine_crash_nonpanic_core, NULL, false);
+	msecs = 1000; /* Wait at most a second for the other cpus to stop */
+	while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) {
+		mdelay(1);
+		msecs--;
+	}
+	if (atomic_read(&waiting_for_crash_ipi) > 0)
+		printk(KERN_WARNING "Non-crashing CPUs did not react to IPI\n");
+
+	crash_save_cpu(regs, smp_processor_id());
+
+	printk(KERN_INFO "Loading crashdump kernel...\n");
 }
 
+/*
+ * Function pointer to optional machine-specific reinitialization
+ */
+void (*kexec_reinit)(void);
+
 void machine_kexec(struct kimage *image)
 {
 	unsigned long page_list;
 	unsigned long reboot_code_buffer_phys;
 	void *reboot_code_buffer;
 
-
 	page_list = image->head & PAGE_MASK;
 
 	/* we need both effective and real address here */
@@ -74,7 +110,20 @@ void machine_kexec(struct kimage *image)
 			   (unsigned long) reboot_code_buffer + KEXEC_CONTROL_PAGE_SIZE);
 	printk(KERN_INFO "Bye!\n");
 
-	cpu_proc_fin();
+	if (kexec_reinit)
+		kexec_reinit();
+	local_irq_disable();
+	local_fiq_disable();
 	setup_mm_for_reboot(0); /* mode is not used, so just pass 0*/
+	v7_flush_kern_cache_all();
+#ifdef CONFIG_OUTER_CACHE
+	outer_flush_all();
+	outer_disable();
+#endif
+	cpu_proc_fin();
+#ifdef CONFIG_OUTER_CACHE
+	outer_inv_all();
+#endif
+	//v7_flush_kern_cache_all();
 	cpu_reset(reboot_code_buffer_phys);
 }