Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / bootcount / bootcount_at91.c

diff --git a/qemu/roms/u-boot/drivers/bootcount/bootcount_at91.c b/qemu/roms/u-boot/drivers/bootcount/bootcount_at91.c
new file mode 100644 (file)
index 0000000..9c2bbfa
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/bootcount/bootcount_at91.c
@@ -0,0 +1,31 @@
+/*
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/at91_gpbr.h>
+
+/*
+ * We combine the BOOTCOUNT_MAGIC and bootcount in one 32-bit register.
+ * This is done so we need to use only one of the four GPBR registers.
+ */
+void bootcount_store(ulong a)
+{
+       at91_gpbr_t *gpbr = (at91_gpbr_t *) ATMEL_BASE_GPBR;
+
+       writel((BOOTCOUNT_MAGIC & 0xffff0000) | (a & 0x0000ffff),
+               &gpbr->reg[AT91_GPBR_INDEX_BOOTCOUNT]);
+}
+
+ulong bootcount_load(void)
+{
+       at91_gpbr_t *gpbr = (at91_gpbr_t *) ATMEL_BASE_GPBR;
+
+       ulong val = readl(&gpbr->reg[AT91_GPBR_INDEX_BOOTCOUNT]);
+       if ((val & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
+               return 0;
+       else
+               return val & 0x0000ffff;
+}