initial commit of lk (little kernel) project
diff --git a/arch/arm/include/arch/arm.h b/arch/arm/include/arch/arm.h
new file mode 100644
index 0000000..a14bf9c
--- /dev/null
+++ b/arch/arm/include/arch/arm.h
@@ -0,0 +1,94 @@
+/*
+ * 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.
+ */
+#ifndef __ARCH_ARM_H
+#define __ARCH_ARM_H
+
+#include <sys/types.h>
+#include <arch/arm/cores.h>
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+void arm_context_switch(vaddr_t *old_sp, vaddr_t new_sp);
+
+static inline uint32_t read_cpsr() {
+ uint32_t cpsr;
+
+ __asm__ volatile("mrs %0, cpsr" : "=r" (cpsr));
+ return cpsr;
+}
+
+struct arm_iframe {
+ uint32_t spsr;
+ uint32_t r0;
+ uint32_t r1;
+ uint32_t r2;
+ uint32_t r3;
+ uint32_t r12;
+ uint32_t lr;
+ uint32_t pc;
+};
+
+struct arm_fault_frame {
+ uint32_t spsr;
+ uint32_t usp;
+ uint32_t ulr;
+ uint32_t r[13];
+ uint32_t pc;
+};
+
+#define MODE_MASK 0x1f
+#define MODE_USR 0x10
+#define MODE_FIQ 0x11
+#define MODE_IRQ 0x12
+#define MODE_SVC 0x13
+#define MODE_MON 0x16
+#define MODE_ABT 0x17
+#define MODE_UND 0x1b
+#define MODE_SYS 0x1f
+
+struct arm_mode_regs {
+ uint32_t fiq_r13, fiq_r14;
+ uint32_t irq_r13, irq_r14;
+ uint32_t svc_r13, svc_r14;
+ uint32_t abt_r13, abt_r14;
+ uint32_t und_r13, und_r14;
+ uint32_t sys_r13, sys_r14;
+};
+
+void arm_save_mode_regs(struct arm_mode_regs *regs);
+
+uint32_t arm_read_cr1(void);
+void arm_write_cr1(uint32_t val);
+uint32_t arm_read_cr1_aux(void);
+void arm_write_cr1_aux(uint32_t val);
+void arm_write_ttbr(uint32_t val);
+void arm_write_dacr(uint32_t val);
+void arm_invalidate_tlb(void);
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif