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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/i386/mach-generic/probe.c
downloadlinux-stericsson-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/i386/mach-generic/probe.c')
-rw-r--r--arch/i386/mach-generic/probe.c102
1 files changed, 102 insertions, 0 deletions
diff --git a/arch/i386/mach-generic/probe.c b/arch/i386/mach-generic/probe.c
new file mode 100644
index 000000000000..5497c65a8790
--- /dev/null
+++ b/arch/i386/mach-generic/probe.c
@@ -0,0 +1,102 @@
+/* Copyright 2003 Andi Kleen, SuSE Labs.
+ * Subject to the GNU Public License, v.2
+ *
+ * Generic x86 APIC driver probe layer.
+ */
+#include <linux/config.h>
+#include <linux/threads.h>
+#include <linux/cpumask.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/ctype.h>
+#include <linux/init.h>
+#include <asm/fixmap.h>
+#include <asm/mpspec.h>
+#include <asm/apicdef.h>
+#include <asm/genapic.h>
+
+extern struct genapic apic_summit;
+extern struct genapic apic_bigsmp;
+extern struct genapic apic_es7000;
+extern struct genapic apic_default;
+
+struct genapic *genapic = &apic_default;
+
+struct genapic *apic_probe[] __initdata = {
+ &apic_summit,
+ &apic_bigsmp,
+ &apic_es7000,
+ &apic_default, /* must be last */
+ NULL,
+};
+
+void __init generic_apic_probe(char *command_line)
+{
+ char *s;
+ int i;
+ int changed = 0;
+
+ s = strstr(command_line, "apic=");
+ if (s && (s == command_line || isspace(s[-1]))) {
+ char *p = strchr(s, ' '), old;
+ if (!p)
+ p = strchr(s, '\0');
+ old = *p;
+ *p = 0;
+ for (i = 0; !changed && apic_probe[i]; i++) {
+ if (!strcmp(apic_probe[i]->name, s+5)) {
+ changed = 1;
+ genapic = apic_probe[i];
+ }
+ }
+ if (!changed)
+ printk(KERN_ERR "Unknown genapic `%s' specified.\n", s);
+ *p = old;
+ }
+ for (i = 0; !changed && apic_probe[i]; i++) {
+ if (apic_probe[i]->probe()) {
+ changed = 1;
+ genapic = apic_probe[i];
+ }
+ }
+ /* Not visible without early console */
+ if (!changed)
+ panic("Didn't find an APIC driver");
+
+ printk(KERN_INFO "Using APIC driver %s\n", genapic->name);
+}
+
+/* These functions can switch the APIC even after the initial ->probe() */
+
+int __init mps_oem_check(struct mp_config_table *mpc, char *oem, char *productid)
+{
+ int i;
+ for (i = 0; apic_probe[i]; ++i) {
+ if (apic_probe[i]->mps_oem_check(mpc,oem,productid)) {
+ genapic = apic_probe[i];
+ printk(KERN_INFO "Switched to APIC driver `%s'.\n",
+ genapic->name);
+ return 1;
+ }
+ }
+ return 0;
+}
+
+int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
+{
+ int i;
+ for (i = 0; apic_probe[i]; ++i) {
+ if (apic_probe[i]->acpi_madt_oem_check(oem_id, oem_table_id)) {
+ genapic = apic_probe[i];
+ printk(KERN_INFO "Switched to APIC driver `%s'.\n",
+ genapic->name);
+ return 1;
+ }
+ }
+ return 0;
+}
+
+int hard_smp_processor_id(void)
+{
+ return genapic->get_apic_id(*(unsigned long *)(APIC_BASE+APIC_ID));
+}