// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Initial setup - routines for HP 9000 based hardware .
*
* Copyright ( C ) 1991 , 1992 , 1995 Linus Torvalds
* Modifications for PA - RISC ( C ) 1999 - 2008 Helge Deller < deller @ gmx . de >
* Modifications copyright 1999 SuSE GmbH ( Philipp Rumpf )
* Modifications copyright 2000 Martin K . Petersen < mkp @ mkp . net >
* Modifications copyright 2000 Philipp Rumpf < prumpf @ tux . org >
* Modifications copyright 2001 Ryan Bradetich < rbradetich @ uswest . net >
*
* Initial PA - RISC Version : 04 - 23 - 1999 by Helge Deller
*/
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/seq_file.h>
#include <linux/random.h>
#include <linux/slab.h>
#include <linux/cpu.h>
#include <asm /topology.h>
#include <asm /param.h>
#include <asm /cache.h>
#include <asm /hardware.h> /* for register_parisc_driver() stuff */
#include <asm /processor.h>
#include <asm /page.h>
#include <asm /pdc.h>
#include <asm /smp.h>
#include <asm /pdcpat.h>
#include <asm /irq.h> /* for struct irq_region */
#include <asm /parisc-device.h>
struct system_cpuinfo_parisc boot_cpu_data __ro_after_init;
EXPORT_SYMBOL(boot_cpu_data);
#ifdef CONFIG_PA8X00
int _parisc_requires_coherency __ro_after_init;
EXPORT_SYMBOL(_parisc_requires_coherency);
#endif
DEFINE_PER_CPU(struct cpuinfo_parisc, cpu_data);
/*
* * PARISC CPU driver - claim " device " and initialize CPU data structures .
* *
* * Consolidate per CPU initialization into ( mostly ) one module .
* * Monarch CPU will initialize boot_cpu_data which shouldn ' t
* * change once the system has booted .
* *
* * The callback * should * do per - instance initialization of
* * everything including the monarch . " Per CPU " init code in
* * setup . c : start_parisc ( ) has migrated here and start_parisc ( )
* * will call register_parisc_driver ( & cpu_driver ) before calling do_inventory ( ) .
* *
* * The goal of consolidating CPU initialization into one place is
* * to make sure all CPUs get initialized the same way .
* * The code path not shared is how PDC hands control of the CPU to the OS .
* * The initialization of OS data structures is the same ( done below ) .
*/
/**
* init_percpu_prof - enable / setup per cpu profiling hooks .
* @ cpunum : The processor instance .
*
* FIXME : doesn ' t do much yet . . .
*/
static void
init_percpu_prof(unsigned long cpunum)
{
}
/**
* processor_probe - Determine if processor driver should claim this device .
* @ dev : The device which has been found .
*
* Determine if processor driver should claim this chip ( return 0 ) or not
* ( return 1 ) . If so , initialize the chip and tell other partners in crime
* they have work to do .
*/
static int __init processor_probe(struct parisc_device *dev)
{
unsigned long txn_addr;
unsigned long cpuid;
struct cpuinfo_parisc *p;
struct pdc_pat_cpu_num cpu_info = { };
#ifdef CONFIG_SMP
if (num_online_cpus() >= nr_cpu_ids) {
printk(KERN_INFO "num_online_cpus() >= nr_cpu_ids\n" );
return 1 ;
}
#else
if (boot_cpu_data.cpu_count > 0 ) {
printk(KERN_INFO "CONFIG_SMP=n ignoring additional CPUs\n" );
return 1 ;
}
#endif
/* logical CPU ID and update global counter
* May get overwritten by PAT code .
*/
cpuid = boot_cpu_data.cpu_count;
txn_addr = dev->hpa.start; /* for legacy PDC */
cpu_info.cpu_num = cpu_info.cpu_loc = cpuid;
#ifdef CONFIG_64BIT
if (is_pdc_pat()) {
ulong status;
unsigned long bytecnt;
pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell;
pa_pdc_cell = kmalloc(sizeof (*pa_pdc_cell), GFP_KERNEL);
if (!pa_pdc_cell)
panic("couldn't allocate memory for PDC_PAT_CELL!" );
status = pdc_pat_cell_module(&bytecnt, dev->pcell_loc,
dev->mod_index, PA_VIEW, pa_pdc_cell);
BUG_ON(PDC_OK != status);
/* verify it's the same as what do_pat_inventory() found */
BUG_ON(dev->mod_info != pa_pdc_cell->mod_info);
BUG_ON(dev->pmod_loc != pa_pdc_cell->mod_location);
txn_addr = pa_pdc_cell->mod[0 ]; /* id_eid for IO sapic */
kfree(pa_pdc_cell);
/* get the cpu number */
status = pdc_pat_cpu_get_number(&cpu_info, dev->hpa.start);
BUG_ON(PDC_OK != status);
pr_info("Logical CPU #%lu is physical cpu #%lu at location "
"0x%lx with hpa %pa\n" ,
cpuid, cpu_info.cpu_num, cpu_info.cpu_loc,
&dev->hpa.start);
#undef USE_PAT_CPUID
#ifdef USE_PAT_CPUID
/* We need contiguous numbers for cpuid. Firmware's notion
* of cpuid is for physical CPUs and we just don ' t care yet .
* We ' ll care when we need to query PAT PDC about a CPU * after *
* boot time ( ie shutdown a CPU from an OS perspective ) .
*/
if (cpu_info.cpu_num >= NR_CPUS) {
printk(KERN_WARNING "IGNORING CPU at %pa,"
" cpu_slot_id > NR_CPUS"
" (%ld > %d)\n" ,
&dev->hpa.start, cpu_info.cpu_num, NR_CPUS);
/* Ignore CPU since it will only crash */
boot_cpu_data.cpu_count--;
return 1 ;
} else {
cpuid = cpu_info.cpu_num;
}
#endif
}
#endif
p = &per_cpu(cpu_data, cpuid);
boot_cpu_data.cpu_count++;
/* initialize counters - CPU 0 gets it_value set in time_init() */
if (cpuid)
memset(p, 0 , sizeof (struct cpuinfo_parisc));
p->dev = dev; /* Save IODC data in case we need it */
p->hpa = dev->hpa.start; /* save CPU hpa */
p->cpuid = cpuid; /* save CPU id */
p->txn_addr = txn_addr; /* save CPU IRQ address */
p->cpu_num = cpu_info.cpu_num;
p->cpu_loc = cpu_info.cpu_loc;
store_cpu_topology(cpuid);
#ifdef CONFIG_SMP
/*
* * FIXME : review if any other initialization is clobbered
* * for boot_cpu by the above memset ( ) .
*/
init_percpu_prof(cpuid);
#endif
/*
* * CONFIG_SMP : init_smp_config ( ) will attempt to get CPUs into
* * OS control . RENDEZVOUS is the default state - see mem_set above .
* * p - > state = STATE_RENDEZVOUS ;
*/
#if 0
/* CPU 0 IRQ table is statically allocated/initialized */
if (cpuid) {
struct irqaction actions[];
/*
* * itimer and ipi IRQ handlers are statically initialized in
* * arch / parisc / kernel / irq . c . ie Don ' t need to register them .
*/
actions = kmalloc(sizeof (struct irqaction)*MAX_CPU_IRQ, GFP_ATOMIC);
if (!actions) {
/* not getting it's own table, share with monarch */
actions = cpu_irq_actions[0 ];
}
cpu_irq_actions[cpuid] = actions;
}
#endif
/*
* Bring this CPU up now ! ( ignore bootstrap cpuid = = 0 )
*/
#ifdef CONFIG_SMP
if (cpuid) {
set_cpu_present(cpuid, true );
add_cpu(cpuid);
}
#endif
return 0 ;
}
/**
* collect_boot_cpu_data - Fill the boot_cpu_data structure .
*
* This function collects and stores the generic processor information
* in the boot_cpu_data structure .
*/
void __init collect_boot_cpu_data(void )
{
unsigned long cr16_seed;
char orig_prod_num[64 ], current_prod_num[64 ], serial_no[64 ];
memset(&boot_cpu_data, 0 , sizeof (boot_cpu_data));
cr16_seed = get_cycles();
add_device_randomness(&cr16_seed, sizeof (cr16_seed));
boot_cpu_data.cpu_hz = 100 * PAGE0->mem_10msec; /* Hz of this PARISC */
/* get CPU-Model Information... */
#define p ((unsigned long *)&boot_cpu_data.pdc.model)
if (pdc_model_info(&boot_cpu_data.pdc.model) == PDC_OK) {
printk(KERN_INFO
"model %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n" ,
p[0 ], p[1 ], p[2 ], p[3 ], p[4 ], p[5 ], p[6 ], p[7 ], p[8 ], p[9 ]);
add_device_randomness(&boot_cpu_data.pdc.model,
sizeof (boot_cpu_data.pdc.model));
}
#undef p
if (pdc_model_versions(&boot_cpu_data.pdc.versions, 0 ) == PDC_OK) {
printk(KERN_INFO "vers %08lx\n" ,
boot_cpu_data.pdc.versions);
add_device_randomness(&boot_cpu_data.pdc.versions,
sizeof (boot_cpu_data.pdc.versions));
}
if (pdc_model_cpuid(&boot_cpu_data.pdc.cpuid) == PDC_OK) {
printk(KERN_INFO "CPUID vers %ld rev %ld (0x%08lx)\n" ,
(boot_cpu_data.pdc.cpuid >> 5 ) & 127 ,
boot_cpu_data.pdc.cpuid & 31 ,
boot_cpu_data.pdc.cpuid);
add_device_randomness(&boot_cpu_data.pdc.cpuid,
sizeof (boot_cpu_data.pdc.cpuid));
}
if (pdc_model_capabilities(&boot_cpu_data.pdc.capabilities) == PDC_OK)
printk(KERN_INFO "capabilities 0x%lx\n" ,
boot_cpu_data.pdc.capabilities);
if (pdc_model_sysmodel(OS_ID_HPUX, boot_cpu_data.pdc.sys_model_name) == PDC_OK)
pr_info("HP-UX model name: %s\n" ,
boot_cpu_data.pdc.sys_model_name);
serial_no[0 ] = 0 ;
if (pdc_model_sysmodel(OS_ID_MPEXL, serial_no) == PDC_OK &&
serial_no[0 ])
pr_info("MPE/iX model name: %s\n" , serial_no);
dump_stack_set_arch_desc("%s" , boot_cpu_data.pdc.sys_model_name);
boot_cpu_data.hversion = boot_cpu_data.pdc.model.hversion;
boot_cpu_data.sversion = boot_cpu_data.pdc.model.sversion;
boot_cpu_data.cpu_type = parisc_get_cpu_type(boot_cpu_data.hversion);
boot_cpu_data.cpu_name = cpu_name_version[boot_cpu_data.cpu_type][0 ];
boot_cpu_data.family_name = cpu_name_version[boot_cpu_data.cpu_type][1 ];
#ifdef CONFIG_PA8X00
_parisc_requires_coherency = (boot_cpu_data.cpu_type == mako) ||
(boot_cpu_data.cpu_type == mako2);
#endif
if (pdc_model_platform_info(orig_prod_num, current_prod_num, serial_no) == PDC_OK) {
printk(KERN_INFO "product %s, original product %s, S/N: %s\n" ,
current_prod_num[0 ] ? current_prod_num : "n/a" ,
orig_prod_num, serial_no);
add_device_randomness(orig_prod_num, strlen(orig_prod_num));
add_device_randomness(current_prod_num, strlen(current_prod_num));
add_device_randomness(serial_no, strlen(serial_no));
}
}
/**
* init_per_cpu - Handle individual processor initializations .
* @ cpunum : logical processor number .
*
* This function handles initialization for * every * CPU
* in the system :
*
* o Set " default " CPU width for trap handlers
*
* o Enable FP coprocessor
* REVISIT : this could be done in the " code 22 " trap handler .
* ( frowands idea - that way we know which processes need FP
* registers saved on the interrupt stack . )
* NEWS FLASH : wide kernels need FP coprocessor enabled to handle
* formatted printing of % lx for example ( double divides I think )
*
* o Enable CPU profiling hooks .
*/
int init_per_cpu(int cpunum)
{
int ret;
struct pdc_coproc_cfg coproc_cfg;
set_firmware_width();
ret = pdc_coproc_cfg(&coproc_cfg);
if (ret >= 0 && coproc_cfg.ccr_functional) {
mtctl(coproc_cfg.ccr_functional, 10 ); /* 10 == Coprocessor Control Reg */
/* FWIW, FP rev/model is a more accurate way to determine
* * CPU type . CPU rev / model has some ambiguous cases .
*/
per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
if (cpunum == 0 )
printk(KERN_INFO "FP[%d] enabled: Rev %ld Model %ld\n" ,
cpunum, coproc_cfg.revision, coproc_cfg.model);
/*
* * store status register to stack ( hopefully aligned )
* * and clear the T - bit .
*/
asm volatile ("fstd %fr0,8(%sp)" );
} else {
printk(KERN_WARNING "WARNING: No FP CoProcessor?!"
" (coproc_cfg.ccr_functional == 0x%lx, expected 0xc0)\n"
#ifdef CONFIG_64BIT
"Halting Machine - FP required\n"
#endif
, coproc_cfg.ccr_functional);
#ifdef CONFIG_64BIT
mdelay(100 ); /* previous chars get pushed to console */
panic("FP CoProc not reported" );
#endif
}
/* FUTURE: Enable Performance Monitor : ccr bit 0x20 */
init_percpu_prof(cpunum);
btlb_init_per_cpu();
return ret;
}
/*
* Display CPU info for all CPUs .
*/
int
show_cpuinfo (struct seq_file *m, void *v)
{
unsigned long cpu;
char cpu_name[60 ], *p;
/* strip PA path from CPU name to not confuse lscpu */
strscpy(cpu_name, per_cpu(cpu_data, 0 ).dev->name, sizeof (cpu_name));
p = strrchr(cpu_name, '[' );
if (p)
*(--p) = 0 ;
for_each_online_cpu(cpu) {
#ifdef CONFIG_SMP
const struct cpuinfo_parisc *cpuinfo = &per_cpu(cpu_data, cpu);
if (0 == cpuinfo->hpa)
continue ;
#endif
seq_printf(m, "processor\t: %lu\n"
"cpu family\t: PA-RISC %s\n" ,
cpu, boot_cpu_data.family_name);
seq_printf(m, "cpu\t\t: %s\n" , boot_cpu_data.cpu_name );
/* cpu MHz */
seq_printf(m, "cpu MHz\t\t: %d.%06d\n" ,
boot_cpu_data.cpu_hz / 1000000 ,
boot_cpu_data.cpu_hz % 1000000 );
#ifdef CONFIG_GENERIC_ARCH_TOPOLOGY
seq_printf(m, "physical id\t: %d\n" ,
topology_physical_package_id(cpu));
seq_printf(m, "siblings\t: %d\n" ,
cpumask_weight(topology_core_cpumask(cpu)));
seq_printf(m, "core id\t\t: %d\n" , topology_core_id(cpu));
#endif
seq_printf(m, "capabilities\t:" );
if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS32)
seq_puts(m, " os32" );
if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS64)
seq_puts(m, " os64" );
if (boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC)
seq_puts(m, " iopdir_fdc" );
switch (boot_cpu_data.pdc.capabilities & PDC_MODEL_NVA_MASK) {
case PDC_MODEL_NVA_SUPPORTED:
seq_puts(m, " nva_supported" );
break ;
case PDC_MODEL_NVA_SLOW:
seq_puts(m, " nva_slow" );
break ;
case PDC_MODEL_NVA_UNSUPPORTED:
seq_puts(m, " needs_equivalent_aliasing" );
break ;
}
seq_printf(m, " (0x%02lx)\n" , boot_cpu_data.pdc.capabilities);
seq_printf(m, "model\t\t: %s - %s\n" ,
boot_cpu_data.pdc.sys_model_name,
cpu_name);
seq_printf(m, "hversion\t: 0x%08x\n"
"sversion\t: 0x%08x\n" ,
boot_cpu_data.hversion,
boot_cpu_data.sversion );
/* print cachesize info */
show_cache_info(m);
seq_printf(m, "bogomips\t: %lu.%02lu\n" ,
loops_per_jiffy / (500000 / HZ),
loops_per_jiffy / (5000 / HZ) % 100 );
seq_printf(m, "software id\t: %ld\n\n" ,
boot_cpu_data.pdc.model.sw_id);
}
return 0 ;
}
static const struct parisc_device_id processor_tbl[] __initconst = {
{ HPHW_NPROC, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, SVERSION_ANY_ID },
{ 0 , }
};
static struct parisc_driver cpu_driver __refdata = {
.name = "CPU" ,
.id_table = processor_tbl,
.probe = processor_probe
};
/**
* processor_init - Processor initialization procedure .
*
* Register this driver .
*/
void __init processor_init(void )
{
reset_cpu_topology();
register_parisc_driver(&cpu_driver);
}
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