// SPDX-License-Identifier: GPL-2.0-only
/*
* System Abstraction Layer (SAL) interface routines.
*
* Copyright (C) 1998, 1999, 2001, 2003 Hewlett-Packard Co
* David Mosberger-Tang <davidm@hpl.hp.com>
* Copyright (C) 1999 VA Linux Systems
* Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/string.h>
#include <asm/delay.h>
#include <asm/page.h>
#include <asm/sal.h>
#include <asm/pal.h>
#include <asm/xtp.h>
__cacheline_aligned DEFINE_SPINLOCK(sal_lock);
unsigned long sal_platform_features;
unsigned short sal_revision;
unsigned short sal_version;
#define SAL_MAJOR(x) ((x) >> 8)
#define SAL_MINOR(x) ((x) & 0xff)
static struct {
void *addr; /* function entry point */
void *gpval; /* gp value to use */
} pdesc;
static long
default_handler (void)
{
return -1;
}
ia64_sal_handler ia64_sal = (ia64_sal_handler) default_handler;
ia64_sal_desc_ptc_t *ia64_ptc_domain_info;
const char *
ia64_sal_strerror (long status)
{
const char *str;
switch (status) {
case 0: str = "Call completed without error"; break;
case 1: str = "Effect a warm boot of the system to complete "
"the update"; break;
case -1: str = "Not implemented"; break;
case -2: str = "Invalid argument"; break;
case -3: str = "Call completed with error"; break;
case -4: str = "Virtual address not registered"; break;
case -5: str = "No information available"; break;
case -6: str = "Insufficient space to add the entry"; break;
case -7: str = "Invalid entry_addr value"; break;
case -8: str = "Invalid interrupt vector"; break;
case -9: str = "Requested memory not available"; break;
case -10: str = "Unable to write to the NVM device"; break;
case -11: str = "Invalid partition type specified"; break;
case -12: str = "Invalid NVM_Object id specified"; break;
case -13: str = "NVM_Object already has the maximum number "
"of partitions"; break;
case -14: str = "Insufficient space in partition for the "
"requested write sub-function"; break;
case -15: str = "Insufficient data buffer space for the "
"requested read record sub-function"; break;
case -16: str = "Scratch buffer required for the write/delete "
"sub-function"; break;
case -17: str = "Insufficient space in the NVM_Object for the "
"requested create sub-function"; break;
case -18: str = "Invalid value specified in the partition_rec "
"argument"; break;
case -19: str = "Record oriented I/O not supported for this "
"partition"; break;
case -20: str = "Bad format of record to be written or "
"required keyword variable not "
"specified"; break;
default: str = "Unknown SAL status code"; break;
}
return str;
}
void __init
ia64_sal_handler_init (void *entry_point, void *gpval)
{
/* fill in the SAL procedure descriptor and point ia64_sal to it: */
pdesc.addr = entry_point;
pdesc.gpval = gpval;
ia64_sal = (ia64_sal_handler) &pdesc;
}
static void __init
check_versions (struct ia64_sal_systab *systab)
{
sal_revision = (systab->sal_rev_major << 8) | systab->sal_rev_minor;
sal_version = (systab->sal_b_rev_major << 8) | systab->sal_b_rev_minor;
/* Check for broken firmware */
if ((sal_revision == SAL_VERSION_CODE(49, 29))
&& (sal_version == SAL_VERSION_CODE(49, 29)))
{
/*
* Old firmware for zx2000 prototypes have this weird version number,
* reset it to something sane.
*/
sal_revision = SAL_VERSION_CODE(2, 8);
sal_version = SAL_VERSION_CODE(0, 0);
}
}
static void __init
sal_desc_entry_point (void *p)
{
struct ia64_sal_desc_entry_point *ep = p;
ia64_pal_handler_init(__va(ep->pal_proc));
ia64_sal_handler_init(__va(ep->sal_proc), __va(ep->gp));
}
#ifdef CONFIG_SMP
static void __init
set_smp_redirect (int flag)
{
#ifndef CONFIG_HOTPLUG_CPU
if (no_int_routing)
smp_int_redirect &= ~flag;
else
smp_int_redirect |= flag;
#else
/*
* For CPU Hotplug we dont want to do any chipset supported
* interrupt redirection. The reason is this would require that
* All interrupts be stopped and hard bind the irq to a cpu.
* Later when the interrupt is fired we need to set the redir hint
* on again in the vector. This is cumbersome for something that the
* user mode irq balancer will solve anyways.
*/
no_int_routing=1;
smp_int_redirect &= ~flag;
#endif
}
#else
#define set_smp_redirect(flag) do { } while (0)
#endif
static void __init
sal_desc_platform_feature (void *p)
{
struct ia64_sal_desc_platform_feature *pf = p;
sal_platform_features = pf->feature_mask;
printk(KERN_INFO "SAL Platform features:");
if (!sal_platform_features) {
printk(" None\n");
return;
}
if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_BUS_LOCK)
printk(" BusLock");
if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_IRQ_REDIR_HINT) {
printk(" IRQ_Redirection");
set_smp_redirect(SMP_IRQ_REDIRECTION);
}
if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_IPI_REDIR_HINT) {
printk(" IPI_Redirection");
set_smp_redirect(SMP_IPI_REDIRECTION);
}
if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT)
printk(" ITC_Drift");
printk("\n");
}
#ifdef CONFIG_SMP
static void __init
sal_desc_ap_wakeup (void *p)
{
struct ia64_sal_desc_ap_wakeup *ap = p;
switch (ap->mechanism) {
case IA64_SAL_AP_EXTERNAL_INT:
ap_wakeup_vector = ap->vector;
printk(KERN_INFO "SAL: AP wakeup using external interrupt "
"vector 0x%lx\n", ap_wakeup_vector);
break;
default:
printk(KERN_ERR "SAL: AP wakeup mechanism unsupported!\n");
break;
}
}
static void __init
chk_nointroute_opt(void)
{
char *cp;
for (cp = boot_command_line; *cp; ) {
if (memcmp(cp, "nointroute", 10) == 0) {
no_int_routing = 1;
printk ("no_int_routing on\n");
break;
} else {
while (*cp != ' ' && *cp)
++cp;
while (*cp == ' ')
++cp;
}
}
}
#else
static void __init sal_desc_ap_wakeup(void *p) { }
#endif
/*
* HP rx5670 firmware polls for interrupts during SAL_CACHE_FLUSH by reading
* cr.ivr, but it never writes cr.eoi. This leaves any interrupt marked as
* "in-service" and masks other interrupts of equal or lower priority.
*
* HP internal defect reports: F1859, F2775, F3031.
*/
static int sal_cache_flush_drops_interrupts;
static int __init
force_pal_cache_flush(char *str)
{
sal_cache_flush_drops_interrupts = 1;
return 0;
}
early_param("force_pal_cache_flush", force_pal_cache_flush);
void __init
check_sal_cache_flush (void)
{
unsigned long flags;
int cpu;
u64 vector, cache_type = 3;
struct ia64_sal_retval isrv;
if (sal_cache_flush_drops_interrupts)
return;
cpu = get_cpu();
local_irq_save(flags);
/*
* Send ourselves a timer interrupt, wait until it's reported, and see
* if SAL_CACHE_FLUSH drops it.
*/
ia64_send_ipi(cpu, IA64_TIMER_VECTOR, IA64_IPI_DM_INT, 0);
while (!ia64_get_irr(IA64_TIMER_VECTOR))
cpu_relax();
SAL_CALL(isrv, SAL_CACHE_FLUSH, cache_type, 0, 0, 0, 0, 0, 0);
if (isrv.status)
printk(KERN_ERR "SAL_CAL_FLUSH failed with %ld\n", isrv.status);
if (ia64_get_irr(IA64_TIMER_VECTOR)) {
vector = ia64_get_ivr();
ia64_eoi();
WARN_ON(vector != IA64_TIMER_VECTOR);
} else {
sal_cache_flush_drops_interrupts = 1;
printk(KERN_ERR "SAL: SAL_CACHE_FLUSH drops interrupts; "
"PAL_CACHE_FLUSH will be used instead\n");
ia64_eoi();
}
local_irq_restore(flags);
put_cpu();
}
s64
ia64_sal_cache_flush (u64 cache_type)
{
struct ia64_sal_retval isrv;
if (sal_cache_flush_drops_interrupts) {
unsigned long flags;
u64 progress;
s64 rc;
progress = 0;
local_irq_save(flags);
rc = ia64_pal_cache_flush(cache_type,
PAL_CACHE_FLUSH_INVALIDATE, &progress, NULL);
local_irq_restore(flags);
return rc;
}
SAL_CALL(isrv, SAL_CACHE_FLUSH, cache_type, 0, 0, 0, 0, 0, 0);
return isrv.status;
}
EXPORT_SYMBOL_GPL(ia64_sal_cache_flush);
void __init
ia64_sal_init (struct ia64_sal_systab *systab)
{
char *p;
int i;
if (!systab) {
printk(KERN_WARNING "Hmm, no SAL System Table.\n");
return;
}
if (strncmp(systab->signature, "SST_", 4) != 0)
printk(KERN_ERR "bad signature in system table!");
check_versions(systab);
#ifdef CONFIG_SMP
chk_nointroute_opt();
#endif
/* revisions are coded in BCD, so %x does the job for us */
printk(KERN_INFO "SAL %x.%x: %.32s %.32s%sversion %x.%x\n",
SAL_MAJOR(sal_revision), SAL_MINOR(sal_revision),
systab->oem_id, systab->product_id,
systab->product_id[0] ? " " : "",
SAL_MAJOR(sal_version), SAL_MINOR(sal_version));
p = (char *) (systab + 1);
for (i = 0; i < systab->entry_count; i++) {
/*
* The first byte of each entry type contains the type
* descriptor.
*/
switch (*p) {
case SAL_DESC_ENTRY_POINT:
sal_desc_entry_point(p);
break;
case SAL_DESC_PLATFORM_FEATURE:
sal_desc_platform_feature(p);
break;
case SAL_DESC_PTC:
ia64_ptc_domain_info = (ia64_sal_desc_ptc_t *)p;
break;
case SAL_DESC_AP_WAKEUP:
sal_desc_ap_wakeup(p);
break;
}
p += SAL_DESC_SIZE(*p);
}
}
int
ia64_sal_oemcall(struct ia64_sal_retval *isrvp, u64 oemfunc, u64 arg1,
u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7)
{
if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
return -1;
SAL_CALL(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6, arg7);
return 0;
}
EXPORT_SYMBOL(ia64_sal_oemcall);
int
ia64_sal_oemcall_nolock(struct ia64_sal_retval *isrvp, u64 oemfunc, u64 arg1,
u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6,
u64 arg7)
{
if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
return -1;
SAL_CALL_NOLOCK(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6,
arg7);
return 0;
}
EXPORT_SYMBOL(ia64_sal_oemcall_nolock);
int
ia64_sal_oemcall_reentrant(struct ia64_sal_retval *isrvp, u64 oemfunc,
u64 arg1, u64 arg2, u64 arg3, u64 arg4, u64 arg5,
u64 arg6, u64 arg7)
{
if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
return -1;
SAL_CALL_REENTRANT(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6,
arg7);
return 0;
}
EXPORT_SYMBOL(ia64_sal_oemcall_reentrant);
long
ia64_sal_freq_base (unsigned long which, unsigned long *ticks_per_second,
unsigned long *drift_info)
{
struct ia64_sal_retval isrv;
SAL_CALL(isrv, SAL_FREQ_BASE, which, 0, 0, 0, 0, 0, 0);
*ticks_per_second = isrv.v0;
*drift_info = isrv.v1;
return isrv.status;
}
EXPORT_SYMBOL_GPL(ia64_sal_freq_base);