Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 405 insertions, 0 deletions

diff --git a/arch/ia64/kernel/sal.c b/arch/ia64/kernel/sal.c
new file mode 100644
index 000000000..0464173ea
--- /dev/null
+++ b/arch/ia64/kernel/sal.c
@@ -0,0 +1,405 @@
+/*
+ * 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);
+	}
+
+	if (ia64_platform_is("sn2") && (sal_revision == SAL_VERSION_CODE(2, 9)))
+		/*
+		 * SGI Altix has hard-coded version 2.9 in their prom
+		 * but they actually implement 3.2, so let's fix it here.
+		 */
+		sal_revision = SAL_VERSION_CODE(3, 2);
+}
+
+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.
+	 */
+	platform_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);