- /*
- * print what head.S has found out about the machine
- */
-#ifndef CONFIG_ARCH_S390X
- printk((MACHINE_IS_VM) ?
- "We are running under VM (31 bit mode)\n" :
- "We are running native (31 bit mode)\n");
- printk((MACHINE_HAS_IEEE) ?
- "This machine has an IEEE fpu\n" :
- "This machine has no IEEE fpu\n");
-#else /* CONFIG_ARCH_S390X */
- printk((MACHINE_IS_VM) ?
- "We are running under VM (64 bit mode)\n" :
- "We are running native (64 bit mode)\n");
-#endif /* CONFIG_ARCH_S390X */
+ /*
+ * Setup lowcore for boot cpu
+ */
+ lc_pages = sizeof(void *) == 8 ? 2 : 1;
+ lc = (struct _lowcore *)
+ __alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0);
+ memset(lc, 0, lc_pages * PAGE_SIZE);
+ lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
+ lc->restart_psw.addr =
+ PSW_ADDR_AMODE | (unsigned long) restart_int_handler;
+ lc->external_new_psw.mask = PSW_KERNEL_BITS;
+ lc->external_new_psw.addr =
+ PSW_ADDR_AMODE | (unsigned long) ext_int_handler;
+ lc->svc_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_IO | PSW_MASK_EXT;
+ lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call;
+ lc->program_new_psw.mask = PSW_KERNEL_BITS;
+ lc->program_new_psw.addr =
+ PSW_ADDR_AMODE | (unsigned long)pgm_check_handler;
+ lc->mcck_new_psw.mask =
+ PSW_KERNEL_BITS & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT;
+ lc->mcck_new_psw.addr =
+ PSW_ADDR_AMODE | (unsigned long) mcck_int_handler;
+ lc->io_new_psw.mask = PSW_KERNEL_BITS;
+ lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler;
+ lc->ipl_device = S390_lowcore.ipl_device;
+ lc->jiffy_timer = -1LL;
+ lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE;
+ lc->async_stack = (unsigned long)
+ __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE;
+ lc->panic_stack = (unsigned long)
+ __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE;
+ lc->current_task = (unsigned long) init_thread_union.thread_info.task;
+ lc->thread_info = (unsigned long) &init_thread_union;
+#ifndef CONFIG_64BIT
+ if (MACHINE_HAS_IEEE) {
+ lc->extended_save_area_addr = (__u32)
+ __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0);
+ /* enable extended save area */
+ __ctl_set_bit(14, 29);
+ }
+#endif
+ set_prefix((u32)(unsigned long) lc);
+}