Import layer1 from osmocomBB (WIP: NOT COMPLETE)gnutoo/layer1-2015-wip

The goal is to touch the code as less as possible.

The following files still had to be modified:
* The Makefiles to integrate it into nuttx
* The layer1's main.c was converted to command-line only:
  No more keyboard and GUI handling.

TODO:
* Finish importing the layer1
* See how to avoid duplication with misc/tools/osmocon/ headers
* Makefile: use $(TOPDIR) if necessary instead of always using ../
  ../ could be used some time only
* Kconfig for -DCONFIG_* ?
* GTA02 support

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@no-log.org>

1 files changed, 113 insertions, 0 deletions

diff --git a/apps/osmocomBB/osmocomBB/include/asm/assembler.h b/apps/osmocomBB/osmocomBB/include/asm/assembler.h
new file mode 100644
index 0000000000..cd03e98d3f
--- /dev/null
+++ b/apps/osmocomBB/osmocomBB/include/asm/assembler.h
@@ -0,0 +1,113 @@
+/*
+ *  linux/include/asm-arm/assembler.h
+ *
+ *  Copyright (C) 1996-2000 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *  This file contains arm architecture specific defines
+ *  for the different processors.
+ *
+ *  Do not include any C declarations in this file - it is included by
+ *  assembler source.
+ */
+#ifndef __ASSEMBLY__
+#error "Only include this from assembly code"
+#endif
+
+#include <asm/ptrace.h>
+
+/*
+ * Endian independent macros for shifting bytes within registers.
+ */
+#ifndef __ARMEB__
+#define pull            lsr
+#define push            lsl
+#define get_byte_0      lsl #0
+#define get_byte_1	lsr #8
+#define get_byte_2	lsr #16
+#define get_byte_3	lsr #24
+#define put_byte_0      lsl #0
+#define put_byte_1	lsl #8
+#define put_byte_2	lsl #16
+#define put_byte_3	lsl #24
+#else
+#define pull            lsl
+#define push            lsr
+#define get_byte_0	lsr #24
+#define get_byte_1	lsr #16
+#define get_byte_2	lsr #8
+#define get_byte_3      lsl #0
+#define put_byte_0	lsl #24
+#define put_byte_1	lsl #16
+#define put_byte_2	lsl #8
+#define put_byte_3      lsl #0
+#endif
+
+#define PLD(code...)
+
+#define MODE_USR	USR_MODE
+#define MODE_FIQ	FIQ_MODE
+#define MODE_IRQ	IRQ_MODE
+#define MODE_SVC	SVC_MODE
+
+#define DEFAULT_FIQ	MODE_FIQ
+
+/*
+ * LOADREGS - ldm with PC in register list (eg, ldmfd sp!, {pc})
+ */
+#ifdef __STDC__
+#define LOADREGS(cond, base, reglist...)\
+	ldm##cond	base,reglist
+#else
+#define LOADREGS(cond, base, reglist...)\
+	ldm/**/cond	base,reglist
+#endif
+
+/*
+ * Build a return instruction for this processor type.
+ */
+#define RETINSTR(instr, regs...)\
+	instr	regs
+
+/*
+ * Enable and disable interrupts
+ */
+	.macro	disable_irq
+	msr	cpsr_c, #PSR_I_BIT | SVC_MODE
+	.endm
+
+	.macro	enable_irq
+	msr	cpsr_c, #SVC_MODE
+	.endm
+
+/*
+ * Save the current IRQ state and disable IRQs.  Note that this macro
+ * assumes FIQs are enabled, and that the processor is in SVC mode.
+ */
+	.macro	save_and_disable_irqs, oldcpsr
+	mrs	\oldcpsr, cpsr
+	disable_irq
+	.endm
+
+/*
+ * Restore interrupt state previously stored in a register.  We don't
+ * guarantee that this will preserve the flags.
+ */
+	.macro	restore_irqs, oldcpsr
+	msr	cpsr_c, \oldcpsr
+	.endm
+
+/*
+ * These two are used to save LR/restore PC over a user-based access.
+ * The old 26-bit architecture requires that we do.  On 32-bit
+ * architecture, we can safely ignore this requirement.
+ */
+	.macro	save_lr
+	.endm
+
+	.macro	restore_pc
+	mov	pc, lr
+	.endm