From: Dave Kleikamp <dave.kleikamp@oracle.com>
Date: Fri, 23 May 2014 22:56:41 +0000 (-0500)
Subject: sparc64: capture obp information during boot
X-Git-Tag: v4.1.12-92~147^2~3^2~8
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=71cf6e3ba1b915a0acbbbc6bd3cabc5008d71446;p=users%2Fjedix%2Flinux-maple.git

sparc64: capture obp information during boot

original patch by Bob Picco

Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Cc: Bob Picco <bob.picco@oracle.com>
---

diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index cab7cbdfb67e5..4d19df252a72c 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -2907,6 +2907,31 @@ void hugetlb_setup(struct pt_regs *regs)
 }
 #endif
 
+#ifdef CONFIG_KEXEC
+static int __init kexec_grab_obp_tranlations(void)
+{
+	unsigned int count;
+	struct sparc64_kexec_shim *shimp = kexec_shim();
+
+	/* The last entry is the NULL terminator */
+	if (prom_trans_ents >= (KEXEC_OBP_TRANSLATION - 1)) {
+		pr_err("kexec_grab_obp_tranlations: EXCEEDS kexec limit\n");
+		goto out;
+	}
+
+	for (count = 0; count < prom_trans_ents; count++) {
+		shimp->obp_translations[count].va = prom_trans[count].virt;
+		shimp->obp_translations[count].size = prom_trans[count].size;
+		shimp->obp_translations[count].tte = prom_trans[count].data;
+	}
+
+	shimp->obp_translations[count].va = 0UL;
+out:
+	return 0;
+}
+device_initcall(kexec_grab_obp_tranlations);
+#endif /* CONFIG_KEXEC */
+
 static struct resource code_resource = {
 	.name	= "Kernel code",
 	.flags	= IORESOURCE_BUSY | IORESOURCE_MEM
diff --git a/arch/sparc/prom/p1275.c b/arch/sparc/prom/p1275.c
index b2340f008ae06..b8127e7b5d822 100644
--- a/arch/sparc/prom/p1275.c
+++ b/arch/sparc/prom/p1275.c
@@ -10,6 +10,7 @@
 #include <linux/string.h>
 #include <linux/spinlock.h>
 #include <linux/irqflags.h>
+#include <linux/kexec.h>
 
 #include <asm/openprom.h>
 #include <asm/oplib.h>
@@ -54,3 +55,15 @@ void prom_cif_init(void *cif_handler, void *cif_stack)
 	p1275buf.prom_cif_handler = (void (*)(long *))cif_handler;
 	p1275buf.prom_cif_stack = (unsigned long)cif_stack;
 }
+
+#ifdef CONFIG_KEXEC
+static int __init kexec_grab_obp_cif_stack(void)
+{
+	struct sparc64_kexec_shim *shimp = kexec_shim();
+
+	shimp->obp_cif = (unsigned long) p1275buf.prom_cif_handler;
+	shimp->obp_sp = (unsigned long) p1275buf.prom_cif_stack;
+	return 0;
+}
+device_initcall(kexec_grab_obp_cif_stack);
+#endif /* CONFIG_KEXEC */