initial commit of lk (little kernel) project
diff --git a/arch/arm/arch.c b/arch/arm/arch.c
new file mode 100644
index 0000000..37b557c
--- /dev/null
+++ b/arch/arm/arch.c
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2008 Travis Geiselbrecht
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include <debug.h>
+#include <arch.h>
+#include <arch/ops.h>
+#include <arch/arm.h>
+#include <arch/arm/mmu.h>
+#include <platform.h>
+
+#if ARM_CPU_CORTEX_A8
+static void set_vector_base(addr_t addr)
+{
+ __asm__ volatile("mcr p15, 0, %0, c12, c0, 0" :: "r" (addr));
+}
+#endif
+
+void arch_early_init(void)
+{
+ /* turn off the cache */
+ arch_disable_cache(UCACHE);
+
+ /* set the vector base to our exception vectors so we dont need to double map at 0 */
+#if ARM_CPU_CORTEX_A8
+ set_vector_base(MEMBASE);
+#endif
+
+#if ARM_WITH_MMU
+ arm_mmu_init();
+
+ platform_init_mmu_mappings();
+#endif
+
+ /* turn the cache back on */
+ arch_enable_cache(UCACHE);
+
+#if ARM_WITH_NEON
+ /* enable cp10 and cp11 */
+ uint32_t val;
+ __asm__ volatile("mrc p15, 0, %0, c1, c0, 2" : "=r" (val));
+ val |= (3<<22)|(3<<20);
+ __asm__ volatile("mcr p15, 0, %0, c1, c0, 2" :: "r" (val));
+
+ /* set enable bit in fpexc */
+ val = (1<<30);
+ __asm__ volatile("mcr p10, 7, %0, c8, c0, 0" :: "r" (val));
+#endif
+}
+
+void arch_init(void)
+{
+}
+