Commit ae795594 authored by Matthew Wilcox's avatar Matthew Wilcox Committed by David Mosberger

[PATCH] ia64: SAL cleanup

This patch reorganises sal.c and adds a small amount of new functionality.

 - Introduce sal_revision to report what revision of the SAL spec is
   supported by the system.
 - Introduce sal_version to report what version of the vendor's SAL
   implementation is present.
 - Introduce SAL_VERSION_CODE to allow for easy comparisons.
 - Print the version at boot, and remove the 'oem=' and 'vendor=' strings.
 - Refactor ia64_sal_init() into several smaller functions.
 - Delete the dead variables 'max' and 'min'.
 - Stop printing the pal_proc and sal_proc entry addresses.
 - Print "None" if there are no SAL platform features.
parent 4d6fe503
......@@ -10,7 +10,6 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/smp.h>
#include <linux/spinlock.h>
#include <linux/string.h>
......@@ -21,6 +20,12 @@
spinlock_t sal_lock __cacheline_aligned = SPIN_LOCK_UNLOCKED;
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 */
......@@ -86,13 +91,75 @@ ia64_sal_handler_init (void *entry_point, void *gpval)
ia64_sal = (ia64_sal_handler) &pdesc;
}
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)
{
if (no_int_routing)
smp_int_redirect &= ~flag;
else
smp_int_redirect |= flag;
}
#else
static void __init set_smp_redirect(int flag) { }
#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;
}
}
#else
static void __init sal_desc_ap_wakeup(void *p) { }
#endif
void __init
ia64_sal_init (struct ia64_sal_systab *systab)
{
unsigned long min, max;
char *p;
struct ia64_sal_desc_entry_point *ep;
int i;
if (!systab) {
......@@ -103,86 +170,36 @@ ia64_sal_init (struct ia64_sal_systab *systab)
if (strncmp(systab->signature, "SST_", 4) != 0)
printk(KERN_ERR "bad signature in system table!");
/*
* revisions are coded in BCD, so %x does the job for us
*/
printk(KERN_INFO "SAL v%x.%x: oem=%.32s, product=%.32s\n",
systab->sal_rev_major, systab->sal_rev_minor,
systab->oem_id, systab->product_id);
sal_revision = (systab->sal_rev_major << 8) | systab->sal_rev_minor;
sal_version = (systab->sal_b_rev_major << 8) | systab->sal_b_rev_minor;
min = ~0UL;
max = 0;
/* 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.
* The first byte of each entry type contains the type
* descriptor.
*/
switch (*p) {
case SAL_DESC_ENTRY_POINT:
ep = (struct ia64_sal_desc_entry_point *) p;
printk(KERN_INFO "SAL: entry: pal_proc=0x%lx, sal_proc=0x%lx\n",
ep->pal_proc, ep->sal_proc);
ia64_pal_handler_init(__va(ep->pal_proc));
ia64_sal_handler_init(__va(ep->sal_proc), __va(ep->gp));
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:
#ifdef CONFIG_SMP
{
struct ia64_sal_desc_ap_wakeup *ap = (void *) 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;
}
break;
}
#endif
case SAL_DESC_PLATFORM_FEATURE:
{
struct ia64_sal_desc_platform_feature *pf = (void *) p;
sal_platform_features = pf->feature_mask;
printk(KERN_INFO "SAL: Platform features ");
if (pf->feature_mask & IA64_SAL_PLATFORM_FEATURE_BUS_LOCK)
printk("BusLock ");
if (pf->feature_mask & IA64_SAL_PLATFORM_FEATURE_IRQ_REDIR_HINT) {
printk("IRQ_Redirection ");
#ifdef CONFIG_SMP
if (no_int_routing)
smp_int_redirect &= ~SMP_IRQ_REDIRECTION;
else
smp_int_redirect |= SMP_IRQ_REDIRECTION;
#endif
}
if (pf->feature_mask & IA64_SAL_PLATFORM_FEATURE_IPI_REDIR_HINT) {
printk("IPI_Redirection ");
#ifdef CONFIG_SMP
if (no_int_routing)
smp_int_redirect &= ~SMP_IPI_REDIRECTION;
else
smp_int_redirect |= SMP_IPI_REDIRECTION;
#endif
}
if (pf->feature_mask & IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT)
printk("ITC_Drift ");
printk("\n");
sal_desc_ap_wakeup(p);
break;
}
}
p += SAL_DESC_SIZE(*p);
}
}
......@@ -35,6 +35,7 @@
#ifndef __ASSEMBLY__
#include <linux/bcd.h>
#include <linux/spinlock.h>
#include <linux/efi.h>
......@@ -229,6 +230,10 @@ typedef struct ia64_sal_desc_ap_wakeup {
extern ia64_sal_handler ia64_sal;
extern struct ia64_sal_desc_ptc *ia64_ptc_domain_info;
extern unsigned short sal_revision; /* supported SAL spec revision */
extern unsigned short sal_version; /* SAL version; OEM dependent */
#define SAL_VERSION_CODE(major, minor) ((BIN2BCD(major) << 8) | BIN2BCD(minor))
extern const char *ia64_sal_strerror (long status);
extern void ia64_sal_init (struct ia64_sal_systab *sal_systab);
......
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