void __init early_setup(unsigned long dt_ptr) { /* Identify CPU type */ identify_cpu(0, mfspr(SPRN_PVR)); /* Assume we're on cpu 0 for now. Don't write to the paca yet! */ setup_paca(0); /* Enable early debugging if any specified (see udbg.h) */ udbg_early_init(); DBG(" -> early_setup(), dt_ptr: 0x%lx\n", dt_ptr); /* * Do early initializations using the flattened device * tree, like retreiving the physical memory map or * calculating/retreiving the hash table size */ early_init_devtree(__va(dt_ptr)); /* Now we know the logical id of our boot cpu, setup the paca. */ setup_paca(boot_cpuid); /* Fix up paca fields required for the boot cpu */ get_paca()->cpu_start = 1; get_paca()->stab_real = __pa((u64)&initial_stab); get_paca()->stab_addr = (u64)&initial_stab; /* Probe the machine type */ probe_machine(); setup_kdump_trampoline(); DBG("Found, Initializing memory management...\n"); /* * Initialize the MMU Hash table and create the linear mapping * of memory. Has to be done before stab/slb initialization as * this is currently where the page size encoding is obtained */ htab_initialize(); /* * Initialize stab / SLB management except on iSeries */ if (cpu_has_feature(CPU_FTR_SLB)) slb_initialize(); else if (!firmware_has_feature(FW_FEATURE_ISERIES)) stab_initialize(get_paca()->stab_real); DBG(" <- early_setup()\n"); }
void __init early_setup(unsigned long dt_ptr) { /* -------- printk is _NOT_ safe to use here ! ------- */ /* Fill in any unititialised pacas */ initialise_pacas(); /* Identify CPU type */ identify_cpu(0, mfspr(SPRN_PVR)); /* Assume we're on cpu 0 for now. Don't write to the paca yet! */ setup_paca(0); /* Initialize lockdep early or else spinlocks will blow */ lockdep_init(); /* -------- printk is now safe to use ------- */ /* Enable early debugging if any specified (see udbg.h) */ udbg_early_init(); DBG(" -> early_setup(), dt_ptr: 0x%lx\n", dt_ptr); /* * Do early initialization using the flattened device * tree, such as retrieving the physical memory map or * calculating/retrieving the hash table size. */ early_init_devtree(__va(dt_ptr)); /* Now we know the logical id of our boot cpu, setup the paca. */ setup_paca(boot_cpuid); /* Fix up paca fields required for the boot cpu */ get_paca()->cpu_start = 1; /* Probe the machine type */ probe_machine(); setup_kdump_trampoline(); DBG("Found, Initializing memory management...\n"); /* Initialize the hash table or TLB handling */ early_init_mmu(); DBG(" <- early_setup()\n"); }
/* too late to fail here */ void default_machine_kexec(struct kimage *image) { /* prepare control code if any */ /* * If the kexec boot is the normal one, need to shutdown other cpus * into our wait loop and quiesce interrupts. * Otherwise, in the case of crashed mode (crashing_cpu >= 0), * stopping other CPUs and collecting their pt_regs is done before * using debugger IPI. */ if (crashing_cpu == -1) kexec_prepare_cpus(); pr_debug("kexec: Starting switchover sequence.\n"); /* switch to a staticly allocated stack. Based on irq stack code. * XXX: the task struct will likely be invalid once we do the copy! */ kexec_stack.thread_info.task = current_thread_info()->task; kexec_stack.thread_info.flags = 0; /* We need a static PACA, too; copy this CPU's PACA over and switch to * it. Also poison per_cpu_offset to catch anyone using non-static * data. */ memcpy(&kexec_paca, get_paca(), sizeof(struct paca_struct)); kexec_paca.data_offset = 0xedeaddeadeeeeeeeUL; paca = (struct paca_struct *)RELOC_HIDE(&kexec_paca, 0) - kexec_paca.paca_index; setup_paca(&kexec_paca); /* XXX: If anyone does 'dynamic lppacas' this will also need to be * switched to a static version! */ /* Some things are best done in assembly. Finding globals with * a toc is easier in C, so pass in what we can. */ kexec_sequence(&kexec_stack, image->start, image, page_address(image->control_code_page), ppc_md.hpte_clear_all); /* NOTREACHED */ }
void __init early_setup(unsigned long dt_ptr) { static __initdata struct paca_struct boot_paca; /* -------- printk is _NOT_ safe to use here ! ------- */ /* Try new device tree based feature discovery ... */ if (!dt_cpu_ftrs_init(__va(dt_ptr))) /* Otherwise use the old style CPU table */ identify_cpu(0, mfspr(SPRN_PVR)); /* Assume we're on cpu 0 for now. Don't write to the paca yet! */ initialise_paca(&boot_paca, 0); setup_paca(&boot_paca); fixup_boot_paca(); /* -------- printk is now safe to use ------- */ /* Enable early debugging if any specified (see udbg.h) */ udbg_early_init(); DBG(" -> early_setup(), dt_ptr: 0x%lx\n", dt_ptr); /* * Do early initialization using the flattened device * tree, such as retrieving the physical memory map or * calculating/retrieving the hash table size. */ early_init_devtree(__va(dt_ptr)); /* Now we know the logical id of our boot cpu, setup the paca. */ if (boot_cpuid != 0) { /* Poison paca_ptrs[0] again if it's not the boot cpu */ memset(&paca_ptrs[0], 0x88, sizeof(paca_ptrs[0])); } setup_paca(paca_ptrs[boot_cpuid]); fixup_boot_paca(); /* * Configure exception handlers. This include setting up trampolines * if needed, setting exception endian mode, etc... */ configure_exceptions(); /* Apply all the dynamic patching */ apply_feature_fixups(); setup_feature_keys(); /* Initialize the hash table or TLB handling */ early_init_mmu(); /* * After firmware and early platform setup code has set things up, * we note the SPR values for configurable control/performance * registers, and use those as initial defaults. */ record_spr_defaults(); /* * At this point, we can let interrupts switch to virtual mode * (the MMU has been setup), so adjust the MSR in the PACA to * have IR and DR set and enable AIL if it exists */ cpu_ready_for_interrupts(); /* * We enable ftrace here, but since we only support DYNAMIC_FTRACE, it * will only actually get enabled on the boot cpu much later once * ftrace itself has been initialized. */ this_cpu_enable_ftrace(); DBG(" <- early_setup()\n"); #ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX /* * This needs to be done *last* (after the above DBG() even) * * Right after we return from this function, we turn on the MMU * which means the real-mode access trick that btext does will * no longer work, it needs to switch to using a real MMU * mapping. This call will ensure that it does */ btext_map(); #endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */ }