400 lines
10 KiB
C
400 lines
10 KiB
C
// 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>
|
|
|
|
__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);
|