Exemplo n.º 1
0
void __init allocate_pacas(void)
{
	int cpu, limit;

	/*
	 * We can't take SLB misses on the paca, and we want to access them
	 * in real mode, so allocate them within the RMA and also within
	 * the first segment.
	 */
	limit = min(0x10000000ULL, ppc64_rma_size);

	paca_size = PAGE_ALIGN(sizeof(struct paca_struct) * nr_cpu_ids);

	paca = __va(memblock_alloc_base(paca_size, PAGE_SIZE, limit));
	memset(paca, 0, paca_size);

	printk(KERN_DEBUG "Allocated %u bytes for %d pacas at %p\n",
		paca_size, nr_cpu_ids, paca);

	allocate_lppacas(nr_cpu_ids, limit);

	/* Can't use for_each_*_cpu, as they aren't functional yet */
	for (cpu = 0; cpu < nr_cpu_ids; cpu++)
		initialise_paca(&paca[cpu], cpu);
}
Exemplo n.º 2
0
void * __init iSeries_early_setup(void)
{
	unsigned long phys_mem_size;

	/* Identify CPU type. This is done again by the common code later
	 * on but calling this function multiple times is fine.
	 */
	identify_cpu(0, mfspr(SPRN_PVR));
	initialise_paca(&boot_paca, 0);

	powerpc_firmware_features |= FW_FEATURE_ISERIES;
	powerpc_firmware_features |= FW_FEATURE_LPAR;

#ifdef CONFIG_SMP
	/* On iSeries we know we can never have more than 64 cpus */
	nr_cpu_ids = max(nr_cpu_ids, 64);
#endif

	iSeries_fixup_klimit();

	/*
	 * Initialize the table which translate Linux physical addresses to
	 * AS/400 absolute addresses
	 */
	phys_mem_size = build_iSeries_Memory_Map();

	iSeries_get_cmdline();

	return (void *) __pa(build_flat_dt(phys_mem_size));
}
Exemplo n.º 3
0
void __init allocate_pacas(void)
{
	int cpu, limit;

	/*
                                                                    
                                                                 
                      
  */
	limit = min(0x10000000ULL, ppc64_rma_size);

	paca_size = PAGE_ALIGN(sizeof(struct paca_struct) * nr_cpu_ids);

	paca = __va(memblock_alloc_base(paca_size, PAGE_SIZE, limit));
	memset(paca, 0, paca_size);

	printk(KERN_DEBUG "Allocated %u bytes for %d pacas at %p\n",
		paca_size, nr_cpu_ids, paca);

	allocate_lppacas(nr_cpu_ids, limit);

	/*                                                         */
	for (cpu = 0; cpu < nr_cpu_ids; cpu++)
		initialise_paca(&paca[cpu], cpu);
}
void __init allocate_pacas(void)
{
	int nr_cpus, cpu, limit;

	/*
	 * We can't take SLB misses on the paca, and we want to access them
	 * in real mode, so allocate them within the RMA and also within
	 * the first segment. On iSeries they must be within the area mapped
	 * by the HV, which is HvPagesToMap * HVPAGESIZE bytes.
	 */
	limit = min(0x10000000ULL, lmb.rmo_size);
	if (firmware_has_feature(FW_FEATURE_ISERIES))
		limit = min(limit, HvPagesToMap * HVPAGESIZE);

	nr_cpus = NR_CPUS;
	/* On iSeries we know we can never have more than 64 cpus */
	if (firmware_has_feature(FW_FEATURE_ISERIES))
		nr_cpus = min(64, nr_cpus);

	paca_size = PAGE_ALIGN(sizeof(struct paca_struct) * nr_cpus);

	paca = __va(lmb_alloc_base(paca_size, PAGE_SIZE, limit));
	memset(paca, 0, paca_size);

	printk(KERN_DEBUG "Allocated %u bytes for %d pacas at %p\n",
		paca_size, nr_cpus, paca);

	/* Can't use for_each_*_cpu, as they aren't functional yet */
	for (cpu = 0; cpu < nr_cpus; cpu++)
		initialise_paca(&paca[cpu], cpu);
}
Exemplo n.º 5
0
void __init allocate_pacas(void)
{
	u64 limit;
	int cpu;

#ifdef CONFIG_PPC_BOOK3S_64
	/*
	 * We access pacas in real mode, and cannot take SLB faults
	 * on them when in virtual mode, so allocate them accordingly.
	 */
	limit = min(ppc64_bolted_size(), ppc64_rma_size);
#else
	limit = ppc64_rma_size;
#endif

	paca_size = PAGE_ALIGN(sizeof(struct paca_struct) * nr_cpu_ids);

	paca = __va(memblock_alloc_base(paca_size, PAGE_SIZE, limit));
	memset(paca, 0, paca_size);

	printk(KERN_DEBUG "Allocated %u bytes for %u pacas at %p\n",
		paca_size, nr_cpu_ids, paca);

	allocate_lppacas(nr_cpu_ids, limit);

	allocate_slb_shadows(nr_cpu_ids, limit);

	/* Can't use for_each_*_cpu, as they aren't functional yet */
	for (cpu = 0; cpu < nr_cpu_ids; cpu++)
		initialise_paca(&paca[cpu], cpu);
}
Exemplo n.º 6
0
void __init early_setup(unsigned long dt_ptr)
{
	/* -------- printk is _NOT_ safe to use here ! ------- */

	/* Identify CPU type */
	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);

	/* 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(&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");
}
Exemplo n.º 7
0
void __init allocate_pacas(void)
{
	u64 limit;
	int cpu;
	int nr_cpus;

	limit = ppc64_rma_size;

#ifdef CONFIG_PPC_BOOK3S_64
	/*
	 * We can't take SLB misses on the paca, and we want to access them
	 * in real mode, so allocate them within the RMA and also within
	 * the first segment.
	 */
	limit = min(0x10000000ULL, limit);
#endif

	/*
	 * Always align up the nr_cpu_ids to SMT threads and allocate
	 * the paca. This will help us to prepare for a situation where
	 * boot cpu id > nr_cpus_id. We will use the last nthreads
	 * slots (nthreads == threads per core) to accommodate a core
	 * that contains boot cpu thread.
	 *
	 * Do not change nr_cpu_ids value here. Let us do that in
	 * early_init_dt_scan_cpus() where we know exact value
	 * of threads per core.
	 */
	nr_cpus = _ALIGN_UP(nr_cpu_ids, MAX_SMT);
	paca_size = PAGE_ALIGN(sizeof(struct paca_struct) * nr_cpus);

	paca = __va(memblock_alloc_base(paca_size, PAGE_SIZE, limit));
	memset(paca, 0, paca_size);

	printk(KERN_DEBUG "Allocated %u bytes for %d pacas at %p\n",
		paca_size, nr_cpus, paca);

	allocate_lppacas(nr_cpus, limit);

	allocate_slb_shadows(nr_cpus, limit);

	/* Can't use for_each_*_cpu, as they aren't functional yet */
	for (cpu = 0; cpu < nr_cpus; cpu++)
		initialise_paca(&paca[cpu], cpu);
}
Exemplo n.º 8
0
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 */
}