Add qemu 2.4.0

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

diff --git a/qemu/roms/u-boot/drivers/bootcount/bootcount_ram.c b/qemu/roms/u-boot/drivers/bootcount/bootcount_ram.c
new file mode 100644 (file)
index 0000000..5bdabcd
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/bootcount/bootcount_ram.c
@@ -0,0 +1,60 @@
+/*
+ * (C) Copyright 2010
+ * Heiko Schocher, DENX Software Engineering, hs@denx.de.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+const ulong patterns[]      = {        0x00000000,
+                               0xFFFFFFFF,
+                               0xFF00FF00,
+                               0x0F0F0F0F,
+                               0xF0F0F0F0};
+const ulong NBR_OF_PATTERNS = sizeof(patterns) / sizeof(*patterns);
+const ulong OFFS_PATTERN    = 3;
+const ulong REPEAT_PATTERN  = 1000;
+
+void bootcount_store(ulong a)
+{
+       ulong *save_addr;
+       ulong size = 0;
+       int i;
+
+       for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++)
+               size += gd->bd->bi_dram[i].size;
+       save_addr = (ulong *)(size - BOOTCOUNT_ADDR);
+       writel(a, save_addr);
+       writel(BOOTCOUNT_MAGIC, &save_addr[1]);
+
+       for (i = 0; i < REPEAT_PATTERN; i++)
+               writel(patterns[i % NBR_OF_PATTERNS],
+                       &save_addr[i + OFFS_PATTERN]);
+
+}
+
+ulong bootcount_load(void)
+{
+       ulong *save_addr;
+       ulong size = 0;
+       ulong counter = 0;
+       int i, tmp;
+
+       for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++)
+               size += gd->bd->bi_dram[i].size;
+       save_addr = (ulong *)(size - BOOTCOUNT_ADDR);
+
+       counter = readl(&save_addr[0]);
+
+       /* Is the counter reliable, check in the big pattern for bit errors */
+       for (i = 0; (i < REPEAT_PATTERN) && (counter != 0); i++) {
+               tmp = readl(&save_addr[i + OFFS_PATTERN]);
+               if (tmp != patterns[i % NBR_OF_PATTERNS])
+                       counter = 0;
+       }
+       return counter;
+}