1 files changed, 133 insertions, 0 deletions

diff --git a/arch/ia64/kernel/machine_kexec.c b/arch/ia64/kernel/machine_kexec.c
new file mode 100644
index 000000000000..468233fa2cee
--- /dev/null
+++ b/arch/ia64/kernel/machine_kexec.c
@@ -0,0 +1,133 @@
+/*
+ * arch/ia64/kernel/machine_kexec.c
+ *
+ * Handle transition of Linux booting another kernel
+ * Copyright (C) 2005 Hewlett-Packard Development Comapny, L.P.
+ * Copyright (C) 2005 Khalid Aziz <khalid.aziz@hp.com>
+ * Copyright (C) 2006 Intel Corp, Zou Nan hai <nanhai.zou@intel.com>
+ *
+ * This source code is licensed under the GNU General Public License,
+ * Version 2.  See the file COPYING for more details.
+ */
+
+#include <linux/mm.h>
+#include <linux/kexec.h>
+#include <linux/cpu.h>
+#include <linux/irq.h>
+#include <asm/mmu_context.h>
+#include <asm/setup.h>
+#include <asm/delay.h>
+#include <asm/meminit.h>
+
+typedef void (*relocate_new_kernel_t)(unsigned long, unsigned long,
+                struct ia64_boot_param *, unsigned long);
+
+struct kimage *ia64_kimage;
+
+struct resource efi_memmap_res = {
+        .name  = "EFI Memory Map",
+        .start = 0,
+        .end   = 0,
+        .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+};
+
+struct resource boot_param_res = {
+        .name  = "Boot parameter",
+        .start = 0,
+        .end   = 0,
+        .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+};
+
+
+/*
+ * Do what every setup is needed on image and the
+ * reboot code buffer to allow us to avoid allocations
+ * later.
+ */
+int machine_kexec_prepare(struct kimage *image)
+{
+        void *control_code_buffer;
+        const unsigned long *func;
+
+        func = (unsigned long *)&relocate_new_kernel;
+        /* Pre-load control code buffer to minimize work in kexec path */
+        control_code_buffer = page_address(image->control_code_page);
+        memcpy((void *)control_code_buffer, (const void *)func[0],
+                        relocate_new_kernel_size);
+        flush_icache_range((unsigned long)control_code_buffer,
+                        (unsigned long)control_code_buffer + relocate_new_kernel_size);
+        ia64_kimage = image;
+
+        return 0;
+}
+
+void machine_kexec_cleanup(struct kimage *image)
+{
+}
+
+void machine_shutdown(void)
+{
+        int cpu;
+
+        for_each_online_cpu(cpu) {
+                if (cpu != smp_processor_id())
+                        cpu_down(cpu);
+        }
+        kexec_disable_iosapic();
+}
+
+/*
+ * Do not allocate memory (or fail in any way) in machine_kexec().
+ * We are past the point of no return, committed to rebooting now.
+ */
+extern void *efi_get_pal_addr(void);
+static void ia64_machine_kexec(struct unw_frame_info *info, void *arg)
+{
+        struct kimage *image = arg;
+        relocate_new_kernel_t rnk;
+        void *pal_addr = efi_get_pal_addr();
+        unsigned long code_addr = (unsigned long)page_address(image->control_code_page);
+        unsigned long vector;
+        int ii;
+
+        if (image->type == KEXEC_TYPE_CRASH) {
+                crash_save_this_cpu();
+                current->thread.ksp = (__u64)info->sw - 16;
+        }
+
+        /* Interrupts aren't acceptable while we reboot */
+        local_irq_disable();
+
+        /* Mask CMC and Performance Monitor interrupts */
+        ia64_setreg(_IA64_REG_CR_PMV, 1 << 16);
+        ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16);
+
+        /* Mask ITV and Local Redirect Registers */
+        ia64_set_itv(1 << 16);
+        ia64_set_lrr0(1 << 16);
+        ia64_set_lrr1(1 << 16);
+
+        /* terminate possible nested in-service interrupts */
+        for (ii = 0; ii < 16; ii++)
+                ia64_eoi();
+
+        /* unmask TPR and clear any pending interrupts */
+        ia64_setreg(_IA64_REG_CR_TPR, 0);
+        ia64_srlz_d();
+        vector = ia64_get_ivr();
+        while (vector != IA64_SPURIOUS_INT_VECTOR) {
+                ia64_eoi();
+                vector = ia64_get_ivr();
+        }
+        platform_kernel_launch_event();
+        rnk = (relocate_new_kernel_t)&code_addr;
+        (*rnk)(image->head, image->start, ia64_boot_param,
+                     GRANULEROUNDDOWN((unsigned long) pal_addr));
+        BUG();
+}
+
+void machine_kexec(struct kimage *image)
+{
+        unw_init_running(ia64_machine_kexec, image);
+        for(;;);
+}