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);
}
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));
}
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);
}
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);
}
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");
}
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);
}
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 */
}