Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / arm / cpu / arm1136 / cpu.c

diff --git a/qemu/roms/u-boot/arch/arm/cpu/arm1136/cpu.c b/qemu/roms/u-boot/arch/arm/cpu/arm1136/cpu.c
new file mode 100644 (file)
index 0000000..a7aed4b
--- /dev/null
+++ b/qemu/roms/u-boot/arch/arm/cpu/arm1136/cpu.c
@@ -0,0 +1,160 @@
+/*
+ * (C) Copyright 2004 Texas Insturments
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+/*
+ * CPU specific code
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/system.h>
+
+static void cache_flush(void);
+
+int cleanup_before_linux (void)
+{
+       /*
+        * this function is called just before we call linux
+        * it prepares the processor for linux
+        *
+        * we turn off caches etc ...
+        */
+
+       disable_interrupts ();
+
+#ifdef CONFIG_LCD
+       {
+               extern void lcd_disable(void);
+               extern void lcd_panel_disable(void);
+
+               lcd_disable(); /* proper disable of lcd & panel */
+               lcd_panel_disable();
+       }
+#endif
+
+       /* turn off I/D-cache */
+       icache_disable();
+       dcache_disable();
+       /* flush I/D-cache */
+       cache_flush();
+
+       return 0;
+}
+
+static void cache_flush(void)
+{
+       unsigned long i = 0;
+       /* clean entire data cache */
+       asm volatile("mcr p15, 0, %0, c7, c10, 0" : : "r" (i));
+       /* invalidate both caches and flush btb */
+       asm volatile("mcr p15, 0, %0, c7, c7, 0" : : "r" (i));
+       /* mem barrier to sync things */
+       asm volatile("mcr p15, 0, %0, c7, c10, 4" : : "r" (i));
+}
+
+#ifndef CONFIG_SYS_DCACHE_OFF
+
+#ifndef CONFIG_SYS_CACHELINE_SIZE
+#define CONFIG_SYS_CACHELINE_SIZE      32
+#endif
+
+void invalidate_dcache_all(void)
+{
+       asm volatile("mcr p15, 0, %0, c7, c6, 0" : : "r" (0));
+}
+
+void flush_dcache_all(void)
+{
+       asm volatile("mcr p15, 0, %0, c7, c10, 0" : : "r" (0));
+       asm volatile("mcr p15, 0, %0, c7, c10, 4" : : "r" (0));
+}
+
+static int check_cache_range(unsigned long start, unsigned long stop)
+{
+       int ok = 1;
+
+       if (start & (CONFIG_SYS_CACHELINE_SIZE - 1))
+               ok = 0;
+
+       if (stop & (CONFIG_SYS_CACHELINE_SIZE - 1))
+               ok = 0;
+
+       if (!ok)
+               debug("CACHE: Misaligned operation at range [%08lx, %08lx]\n",
+                       start, stop);
+
+       return ok;
+}
+
+void invalidate_dcache_range(unsigned long start, unsigned long stop)
+{
+       if (!check_cache_range(start, stop))
+               return;
+
+       while (start < stop) {
+               asm volatile("mcr p15, 0, %0, c7, c6, 1" : : "r" (start));
+               start += CONFIG_SYS_CACHELINE_SIZE;
+       }
+}
+
+void flush_dcache_range(unsigned long start, unsigned long stop)
+{
+       if (!check_cache_range(start, stop))
+               return;
+
+       while (start < stop) {
+               asm volatile("mcr p15, 0, %0, c7, c14, 1" : : "r" (start));
+               start += CONFIG_SYS_CACHELINE_SIZE;
+       }
+
+       asm volatile("mcr p15, 0, %0, c7, c10, 4" : : "r" (0));
+}
+
+void flush_cache(unsigned long start, unsigned long size)
+{
+       flush_dcache_range(start, start + size);
+}
+
+#else /* #ifndef CONFIG_SYS_DCACHE_OFF */
+void invalidate_dcache_all(void)
+{
+}
+
+void flush_dcache_all(void)
+{
+}
+
+void invalidate_dcache_range(unsigned long start, unsigned long stop)
+{
+}
+
+void flush_dcache_range(unsigned long start, unsigned long stop)
+{
+}
+
+void flush_cache(unsigned long start, unsigned long size)
+{
+}
+#endif /* #ifndef CONFIG_SYS_DCACHE_OFF */
+
+#if !defined(CONFIG_SYS_ICACHE_OFF) || !defined(CONFIG_SYS_DCACHE_OFF)
+void enable_caches(void)
+{
+#ifndef CONFIG_SYS_ICACHE_OFF
+       icache_enable();
+#endif
+#ifndef CONFIG_SYS_DCACHE_OFF
+       dcache_enable();
+#endif
+}
+#endif