Add realtek target files

Signed-off-by: Roman Yeryomin <roman@advem.lv>

1 files changed, 136 insertions, 0 deletions

diff --git a/target/linux/realtek/files/arch/rlx/kernel/entry.S b/target/linux/realtek/files/arch/rlx/kernel/entry.S
new file mode 100644
index 000000000..0bf1749c8
--- /dev/null
+++ b/target/linux/realtek/files/arch/rlx/kernel/entry.S
@@ -0,0 +1,136 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1994 - 2000, 2001, 2003 Ralf Baechle
+ * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ * Copyright (C) 2001 MIPS Technologies, Inc.
+ */
+
+#include <asm/asm.h>
+#include <asm/asmmacro.h>
+#include <asm/regdef.h>
+#include <asm/rlxregs.h>
+#include <asm/stackframe.h>
+#include <asm/isadep.h>
+#include <asm/thread_info.h>
+
+#ifndef CONFIG_PREEMPT
+#define resume_kernel	restore_all
+#else
+#define __ret_from_irq	ret_from_exception
+#endif
+
+	.text
+	.align	5
+#ifndef CONFIG_PREEMPT
+FEXPORT(ret_from_exception)
+	local_irq_disable			# preempt stop
+	b	__ret_from_irq
+#endif
+FEXPORT(ret_from_irq)
+	LONG_S	s0, TI_REGS($28)
+FEXPORT(__ret_from_irq)
+	LONG_L	t0, PT_STATUS(sp)		# returning to kernel mode?
+	andi	t0, t0, KU_USER
+	beqz	t0, resume_kernel
+
+resume_userspace:
+	local_irq_disable		# make sure we dont miss an
+					# interrupt setting need_resched
+					# between sampling and return
+	LONG_L	a2, TI_FLAGS($28)	# current->work
+	andi	t0, a2, _TIF_WORK_MASK	# (ignoring syscall_trace)
+	bnez	t0, work_pending
+	j	restore_all
+
+#ifdef CONFIG_PREEMPT
+resume_kernel:
+	local_irq_disable
+	lw	t0, TI_PRE_COUNT($28)
+	bnez	t0, restore_all
+need_resched:
+	LONG_L	t0, TI_FLAGS($28)
+	andi	t1, t0, _TIF_NEED_RESCHED
+	beqz	t1, restore_all
+	LONG_L	t0, PT_STATUS(sp)		# Interrupts off?
+	andi	t0, 1
+	beqz	t0, restore_all
+	jal	preempt_schedule_irq
+	b	need_resched
+#endif
+
+FEXPORT(ret_from_fork)
+	jal	schedule_tail		# a0 = struct task_struct *prev
+
+FEXPORT(syscall_exit)
+	local_irq_disable		# make sure need_resched and
+					# signals dont change between
+					# sampling and return
+	LONG_L	a2, TI_FLAGS($28)	# current->work
+	li	t0, _TIF_ALLWORK_MASK
+	and	t0, a2, t0
+	bnez	t0, syscall_exit_work
+
+FEXPORT(restore_all)			# restore full frame
+	.set	noat
+	RESTORE_TEMP
+	RESTORE_AT
+	RESTORE_STATIC
+FEXPORT(restore_partial)		# restore partial frame
+#ifdef CONFIG_TRACE_IRQFLAGS
+	SAVE_STATIC
+	SAVE_AT
+	SAVE_TEMP
+	LONG_L	v0, PT_STATUS(sp)
+	and	v0, ST0_IEP
+	beqz	v0, 1f
+	jal	trace_hardirqs_on
+	b	2f
+1:	jal	trace_hardirqs_off
+2:
+	RESTORE_TEMP
+	RESTORE_AT
+	RESTORE_STATIC
+#endif
+	RESTORE_SOME
+	RESTORE_SP_AND_RET
+	.set	at
+
+work_pending:
+	andi	t0, a2, _TIF_NEED_RESCHED # a2 is preloaded with TI_FLAGS
+	beqz	t0, work_notifysig
+work_resched:
+	jal	schedule
+
+	local_irq_disable		# make sure need_resched and
+					# signals dont change between
+					# sampling and return
+	LONG_L	a2, TI_FLAGS($28)
+	andi	t0, a2, _TIF_WORK_MASK	# is there any work to be done
+					# other than syscall tracing?
+	beqz	t0, restore_all
+	andi	t0, a2, _TIF_NEED_RESCHED
+	bnez	t0, work_resched
+
+work_notifysig:				# deal with pending signals and
+					# notify-resume requests
+	move	a0, sp
+	li	a1, 0
+	jal	do_notify_resume	# a2 already loaded
+	j	resume_userspace
+
+FEXPORT(syscall_exit_work_partial)
+	SAVE_STATIC
+syscall_exit_work:
+	li	t0, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT
+	and	t0, a2			# a2 is preloaded with TI_FLAGS
+	beqz	t0, work_pending	# trace bit set?
+	local_irq_enable		# could let do_syscall_trace()
+					# call schedule() instead
+	move	a0, sp
+	li	a1, 1
+	jal	do_syscall_trace
+	b	resume_userspace
+