[PATCH 4 of 4] Add initial PowerPC libcflat files & make file changes

[Jerone Young <jyoung5@us.ibm.com>]

4 files changed, 124 insertions(+), 1 deletion(-)
user/config-powerpc.mak           |   10 ++++++-
user/test/lib/powerpc/44x/map.c   |   51 +++++++++++++++++++++++++++++++++++++
user/test/lib/powerpc/44x/tlbwe.S |   29 +++++++++++++++++++++
user/test/lib/powerpc/io.c        |   35 +++++++++++++++++++++++++


Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Jerone Young <jyoung5@.us.ibm.com>

diff --git a/user/config-powerpc.mak b/user/config-powerpc.mak
--- a/user/config-powerpc.mak
+++ b/user/config-powerpc.mak
@@ -3,6 +3,14 @@
 CFLAGS += -I $(KERNELDIR)/include
 # for some reaons binutils hates tlbsx unless we say we're 405  :(
 CFLAGS += -Wa,-mregnames,-m405
+
+cflatobjs += \
+	test/lib/powerpc/io.o \
+	test/lib/powerpc/44x/map.o \
+	test/lib/powerpc/44x/tlbwe.o
+
+$(libcflat): LDFLAGS += -nostdlib
+$(libcflat): CFLAGS += -ffreestanding -I test/lib -I test/lib/powerpc/44x
 
 %.bin: %.o
 	$(OBJCOPY) -O binary $^ $@
@@ -18,7 +26,7 @@
 
 tests := $(addprefix test/powerpc/, $(testobjs))
 
-all: kvmtrace kvmctl $(tests)
+all: kvmtrace kvmctl $(libcflat) $(tests)
 
 kvmctl_objs = main-ppc.o iotable.o ../libkvm/libkvm.a
 
diff --git a/user/test/lib/powerpc/44x/map.c b/user/test/lib/powerpc/44x/map.c
new file mode 100644
--- /dev/null
+++ b/user/test/lib/powerpc/44x/map.c
@@ -0,0 +1,51 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * Copyright IBM Corp. 2008
+ *
+ * Authors: Hollis Blanchard <hollisb@us.ibm.com>
+ */
+
+#include "libcflat.h"
+
+#define TLB_SIZE 64
+
+extern void tlbwe(unsigned int index,
+                  unsigned char tid,
+                  unsigned int word0,
+                  unsigned int word1,
+                  unsigned int word2);
+
+unsigned int next_free_index;
+
+#define PAGE_SHIFT 12
+#define PAGE_MASK (~((1<<PAGE_SHIFT)-1))
+
+#define V (1<<9)
+
+void map(unsigned long vaddr, unsigned long paddr)
+{
+	unsigned int w0, w1, w2;
+
+	/* We don't install exception handlers, so we can't handle TLB misses,
+	 * so we can't loop around and overwrite entry 0. */
+	if (next_free_index++ >= TLB_SIZE)
+		panic("TLB overflow");
+
+	w0 = (vaddr & PAGE_MASK) | V;
+	w1 = paddr & PAGE_MASK;
+	w2 = 0x3;
+
+	tlbwe(next_free_index, 0, w0, w1, w2);
+}
diff --git a/user/test/lib/powerpc/44x/tlbwe.S b/user/test/lib/powerpc/44x/tlbwe.S
new file mode 100644
--- /dev/null
+++ b/user/test/lib/powerpc/44x/tlbwe.S
@@ -0,0 +1,29 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * Copyright IBM Corp. 2008
+ *
+ * Authors: Hollis Blanchard <hollisb@us.ibm.com>
+ */
+
+#define SPRN_MMUCR 0x3b2
+
+/* tlbwe(uint index, uint8_t tid, uint word0, uint word1, uint word2) */
+.global tlbwe
+tlbwe:
+	mtspr	SPRN_MMUCR, r4
+	tlbwe	r5, r3, 0
+	tlbwe	r6, r3, 1
+	tlbwe	r7, r3, 2
+	blr
diff --git a/user/test/lib/powerpc/io.c b/user/test/lib/powerpc/io.c
new file mode 100644
--- /dev/null
+++ b/user/test/lib/powerpc/io.c
@@ -0,0 +1,35 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * Copyright IBM Corp. 2008
+ *
+ * Authors: Hollis Blanchard <hollisb@us.ibm.com>
+ */
+
+#include "libcflat.h"
+
+#define BASE 0xf0000000
+#define _putc ((volatile char *)(BASE))
+#define _exit ((volatile char *)(BASE+1))
+
+void puts(const char *s)
+{
+	while (*s != '\0')
+		*_putc = *s++;
+}
+
+void exit(int code)
+{
+	*_exit = code;
+}