1 files changed, 126 insertions, 0 deletions
diff --git a/post/cpu/ppc4xx/cache.c b/post/cpu/ppc4xx/cache.c
new file mode 100644
index 0000000..109ca1f
--- /dev/null
+++ b/post/cpu/ppc4xx/cache.c
@@ -0,0 +1,126 @@
+/*
+ * (C) Copyright 2007
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Author: Igor Lisitsin <igor@emcraft.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+
+/* Cache test
+ *
+ * This test verifies the CPU data and instruction cache using
+ * several test scenarios.
+ */
+
+#ifdef CONFIG_POST
+
+#include <post.h>
+
+#if CONFIG_POST & CFG_POST_CACHE
+
+#include <asm/mmu.h>
+#include <watchdog.h>
+
+#define CACHE_POST_SIZE	1024
+
+void program_tlb(u32 phys_addr, u32 virt_addr, u32 size, u32 tlb_word2_i_value);
+
+int cache_post_test1 (int tlb, void *p, int size);
+int cache_post_test2 (int tlb, void *p, int size);
+int cache_post_test3 (int tlb, void *p, int size);
+int cache_post_test4 (int tlb, void *p, int size);
+int cache_post_test5 (int tlb, void *p, int size);
+int cache_post_test6 (int tlb, void *p, int size);
+
+static int tlb = -1;		/* index to the victim TLB entry */
+
+#ifdef CONFIG_440
+static unsigned char testarea[CACHE_POST_SIZE]
+__attribute__((__aligned__(CACHE_POST_SIZE)));
+#endif
+
+int cache_post_test (int flags)
+{
+	void* virt = (void*)CFG_POST_CACHE_ADDR;
+	int ints;
+	int res = 0;
+
+	/*
+	 * All 44x variants deal with cache management differently
+	 * because they have the address translation always enabled.
+	 * The 40x ppc's don't use address translation in U-Boot at all,
+	 * so we have to distinguish here between 40x and 44x.
+	 */
+#ifdef CONFIG_440
+	int word0, i;
+
+	if (tlb < 0) {
+		/*
+		 * Allocate a new TLB entry, since we are going to modify
+		 * the write-through and caching inhibited storage attributes.
+		 */
+		program_tlb((u32)testarea, (u32)virt,
+			    CACHE_POST_SIZE, TLB_WORD2_I_ENABLE);
+
+		/* Find the TLB entry */
+		for (i = 0;; i++) {
+			if (i >= PPC4XX_TLB_SIZE) {
+				printf ("Failed to program tlb entry\n");
+				return -1;
+			}
+			word0 = mftlb1(i);
+			if (TLB_WORD0_EPN_DECODE(word0) == (u32)virt) {
+				tlb = i;
+				break;
+			}
+		}
+	}
+#endif
+	ints = disable_interrupts ();
+
+	WATCHDOG_RESET ();
+	if (res == 0)
+		res = cache_post_test1 (tlb, virt, CACHE_POST_SIZE);
+	WATCHDOG_RESET ();
+	if (res == 0)
+		res = cache_post_test2 (tlb, virt, CACHE_POST_SIZE);
+	WATCHDOG_RESET ();
+	if (res == 0)
+		res = cache_post_test3 (tlb, virt, CACHE_POST_SIZE);
+	WATCHDOG_RESET ();
+	if (res == 0)
+		res = cache_post_test4 (tlb, virt, CACHE_POST_SIZE);
+	WATCHDOG_RESET ();
+	if (res == 0)
+		res = cache_post_test5 (tlb, virt, CACHE_POST_SIZE);
+	WATCHDOG_RESET ();
+	if (res == 0)
+		res = cache_post_test6 (tlb, virt, CACHE_POST_SIZE);
+
+	if (ints)
+		enable_interrupts ();
+
+	return res;
+}
+
+#endif /* CONFIG_POST & CFG_POST_CACHE */
+#endif /* CONFIG_POST */