Consolidate bootcount code into drivers/bootcount

This patch moves all bootcount implementations into a common
directory: drivers/bootcount. The generic bootcount driver
is now usable not only by powerpc platforms, but others as well.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Cc: Valentin Longchamp <valentin.longchamp@keymile.com>
Cc: Christian Riesch <christian.riesch@omicron.at>
Cc: Manfred Rudigier <manfred.rudigier@omicron.at>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Reinhard Meyer <reinhard.meyer@emk-elektronik.de>
Tested-by: Valentin Longchamp <valentin.longchamp@keymile.com>
Tested-by: Christian Riesch <christian.riesch@omicron.at>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 100 insertions, 0 deletions

diff --git a/drivers/bootcount/bootcount.c b/drivers/bootcount/bootcount.c
new file mode 100644
index 0000000..80eb717
--- /dev/null
+++ b/drivers/bootcount/bootcount.c
@@ -0,0 +1,100 @@
+/*
+ * (C) Copyright 2010-2012
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * 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 <bootcount.h>
+#include <linux/compiler.h>
+
+/*
+ * Only override CONFIG_SYS_BOOTCOUNT_ADDR if not already defined. This
+ * way, some boards can define it directly in their config header.
+ */
+#if !defined(CONFIG_SYS_BOOTCOUNT_ADDR)
+
+#if defined(CONFIG_MPC5xxx)
+#define CONFIG_SYS_BOOTCOUNT_ADDR	(MPC5XXX_CDM_BRDCRMB)
+#define CONFIG_SYS_BOOTCOUNT_SINGLEWORD
+#endif /* defined(CONFIG_MPC5xxx) */
+
+#if defined(CONFIG_MPC512X)
+#define CONFIG_SYS_BOOTCOUNT_ADDR	(&((immap_t *)CONFIG_SYS_IMMR)->clk.bcr)
+#define CONFIG_SYS_BOOTCOUNT_SINGLEWORD
+#endif /* defined(CONFIG_MPC512X) */
+
+#if defined(CONFIG_8xx)
+#define CONFIG_SYS_BOOTCOUNT_ADDR (((immap_t *)CONFIG_SYS_IMMR)->im_cpm.cp_dpmem + \
+				CPM_BOOTCOUNT_ADDR)
+#endif /* defined(CONFIG_8xx) */
+
+#if defined(CONFIG_MPC8260)
+#include <asm/cpm_8260.h>
+
+#define CONFIG_SYS_BOOTCOUNT_ADDR	(CONFIG_SYS_IMMR + CPM_BOOTCOUNT_ADDR)
+#endif /* defined(CONFIG_MPC8260) */
+
+#if defined(CONFIG_QE)
+#include <asm/immap_qe.h>
+
+#define CONFIG_SYS_BOOTCOUNT_ADDR	(CONFIG_SYS_IMMR + 0x110000 + \
+					 QE_MURAM_SIZE - 2 * sizeof(u32))
+#endif /* defined(CONFIG_MPC8360) */
+
+#if defined(CONFIG_4xx)
+#define CONFIG_SYS_BOOTCOUNT_ADDR	(CONFIG_SYS_OCM_DATA_ADDR + \
+				CONFIG_SYS_BOOTCOUNT_ADDR)
+#endif /* defined(CONFIG_4xx) */
+
+#endif /* !defined(CONFIG_SYS_BOOTCOUNT_ADDR) */
+
+/* Now implement the generic default functions */
+#if defined(CONFIG_SYS_BOOTCOUNT_ADDR)
+__weak void bootcount_store(ulong a)
+{
+	void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
+
+#if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
+	raw_bootcount_store(reg, (BOOTCOUNT_MAGIC & 0xffff0000) | a);
+#else
+	raw_bootcount_store(reg, a);
+	raw_bootcount_store(reg + 4, BOOTCOUNT_MAGIC);
+#endif
+}
+
+__weak ulong bootcount_load(void)
+{
+	void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
+
+#if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
+	u32 tmp = raw_bootcount_load(reg);
+
+	if ((tmp & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
+		return 0;
+	else
+		return (tmp & 0x0000ffff);
+#else
+	if (raw_bootcount_load(reg + 4) != BOOTCOUNT_MAGIC)
+		return 0;
+	else
+		return raw_bootcount_load(reg);
+#endif
+}
+#endif