Add ia64_sync_icache() and use it to make the I-cache coherent

after loading the kernel's text segment. The kernel will do the
same for loaded modules, so don't worry about that.

4 files changed, 55 insertions, 1 deletions

diff --git a/sys/boot/ia64/common/Makefile b/sys/boot/ia64/common/Makefile
index f16f13d..d90898f 100644
--- a/sys/boot/ia64/common/Makefile
+++ b/sys/boot/ia64/common/Makefile
@@ -6,7 +6,7 @@ MK_SSP=		no
 LIB=		ia64
 INTERNALLIB=
 
-SRCS=		autoload.c bootinfo.c copy.c devicename.c exec.c
+SRCS=		autoload.c bootinfo.c copy.c devicename.c exec.c icache.c
 
 CFLAGS+=	-I${.CURDIR}/../../efi/include
 CFLAGS+=	-I${.CURDIR}/../../efi/include/${MACHINE_CPUARCH}
diff --git a/sys/boot/ia64/common/exec.c b/sys/boot/ia64/common/exec.c
index dd9c9ba..65886fa 100644
--- a/sys/boot/ia64/common/exec.c
+++ b/sys/boot/ia64/common/exec.c
@@ -258,6 +258,8 @@ ia64_loadseg(Elf_Ehdr *eh, Elf_Phdr *ph, uint64_t delta)
 	if (ph->p_flags & PF_X) {
 		ia64_text_start = ph->p_vaddr + delta;
 		ia64_text_size = ph->p_memsz;
+
+		ia64_sync_icache(ia64_text_start, ia64_text_size);
 	} else {
 		ia64_data_start = ph->p_vaddr + delta;
 		ia64_data_size = ph->p_memsz;
diff --git a/sys/boot/ia64/common/icache.c b/sys/boot/ia64/common/icache.c
new file mode 100644
index 0000000..77a35d7
--- /dev/null
+++ b/sys/boot/ia64/common/icache.c
@@ -0,0 +1,51 @@
+/*-
+ * Copyright (c) 2011 Marcel Moolenaar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stand.h>
+#include <machine/ia64_cpu.h>
+
+#include "libia64.h"
+
+void
+ia64_sync_icache(vm_offset_t va, size_t sz)
+{
+	uintptr_t pa;
+	size_t cnt, max;
+
+	while (sz > 0) {
+		max = sz;
+		pa = (uintptr_t)ia64_va2pa(va, &max);
+		for (cnt = 0; cnt < max; cnt += 32)
+			ia64_fc_i(pa + cnt);
+		ia64_sync_i();
+		va += max;
+		sz -= max;
+	}
+	ia64_srlz_i();
+}
diff --git a/sys/boot/ia64/common/libia64.h b/sys/boot/ia64/common/libia64.h
index 29912f5..4bc7638 100644
--- a/sys/boot/ia64/common/libia64.h
+++ b/sys/boot/ia64/common/libia64.h
@@ -64,6 +64,7 @@ void ia64_loadseg(void *, void *, uint64_t);
 
 ssize_t ia64_copyin(const void *, vm_offset_t, size_t);
 ssize_t ia64_copyout(vm_offset_t, void *, size_t);
+void ia64_sync_icache(vm_offset_t, size_t);
 ssize_t ia64_readin(int, vm_offset_t, size_t);
 void *ia64_va2pa(vm_offset_t, size_t *);