Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/m68knommu/platform/68360/entry.S b/arch/m68knommu/platform/68360/entry.S
new file mode 100644
index 0000000..f7bc80a
--- /dev/null
+++ b/arch/m68knommu/platform/68360/entry.S
@@ -0,0 +1,184 @@
+/*
+ * linux/arch/m68knommu/platform/68360/entry.S
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ * Copyright (C) 2001 SED Systems, a Division of Calian Ltd.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file README.legal in the main directory of this archive
+ * for more details.
+ *
+ * Linux/m68k support by Hamish Macdonald
+ * M68360 Port by SED Systems, and Lineo.
+ */
+
+#include <linux/config.h>
+#include <linux/sys.h>
+#include <linux/linkage.h>
+#include <asm/thread_info.h>
+#include <asm/unistd.h>
+#include <asm/errno.h>
+#include <asm/setup.h>
+#include <asm/segment.h>
+#include <asm/traps.h>
+#include <asm/asm-offsets.h>
+#include <asm/entry.h>
+
+.text
+
+.globl system_call
+.globl resume
+.globl ret_from_exception
+.globl ret_from_signal
+.globl sys_call_table
+.globl ret_from_interrupt
+.globl bad_interrupt
+.globl inthandler
+
+badsys:
+ movel #-ENOSYS,%sp@(PT_D0)
+ jra ret_from_exception
+
+do_trace:
+ movel #-ENOSYS,%sp@(PT_D0) /* needed for strace*/
+ subql #4,%sp
+ SAVE_SWITCH_STACK
+ jbsr syscall_trace
+ RESTORE_SWITCH_STACK
+ addql #4,%sp
+ movel %sp@(PT_ORIG_D0),%d1
+ movel #-ENOSYS,%d0
+ cmpl #NR_syscalls,%d1
+ jcc 1f
+ lsl #2,%d1
+ lea sys_call_table, %a0
+ jbsr %a0@(%d1)
+
+1: movel %d0,%sp@(PT_D0) /* save the return value */
+ subql #4,%sp /* dummy return address */
+ SAVE_SWITCH_STACK
+ jbsr syscall_trace
+
+ret_from_signal:
+ RESTORE_SWITCH_STACK
+ addql #4,%sp
+ jra ret_from_exception
+
+ENTRY(system_call)
+ SAVE_ALL
+
+ /* save top of frame*/
+ pea %sp@
+ jbsr set_esp0
+ addql #4,%sp
+
+ btst #PF_TRACESYS_BIT,%a2@(TASK_FLAGS+PF_TRACESYS_OFF)
+ jne do_trace
+ cmpl #NR_syscalls,%d0
+ jcc badsys
+ lsl #2,%d0
+ lea sys_call_table,%a0
+ movel %a0@(%d0), %a0
+ jbsr %a0@
+ movel %d0,%sp@(PT_D0) /* save the return value*/
+
+ret_from_exception:
+ btst #5,%sp@(PT_SR) /* check if returning to kernel*/
+ jeq Luser_return /* if so, skip resched, signals*/
+
+Lkernel_return:
+ RESTORE_ALL
+
+Luser_return:
+ /* only allow interrupts when we are really the last one on the*/
+ /* kernel stack, otherwise stack overflow can occur during*/
+ /* heavy interrupt load*/
+ andw #ALLOWINT,%sr
+
+ movel %sp,%d1 /* get thread_info pointer */
+ andl #0xffffe000,%d1
+ movel %d1,%a2
+ move %a2@(TI_FLAGS),%d1 /* thread_info->flags */
+ andl #_TIF_WORK_MASK,%d1
+ jne Lwork_to_do
+ RESTORE_ALL
+
+Lwork_to_do:
+ movel %a2@(TI_FLAGS),%d1 /* thread_info->flags */
+ btst #TIF_NEED_RESCHED,%d1
+ jne reschedule
+
+Lsignal_return:
+ subql #4,%sp /* dummy return address*/
+ SAVE_SWITCH_STACK
+ pea %sp@(SWITCH_STACK_SIZE)
+ clrl %sp@-
+ bsrw do_signal
+ addql #8,%sp
+ RESTORE_SWITCH_STACK
+ addql #4,%sp
+Lreturn:
+ RESTORE_ALL
+
+/*
+ * This is the main interrupt handler, responsible for calling process_int()
+ */
+inthandler:
+ SAVE_ALL
+ addql #1,local_irq_count /* put exception # in d0*/
+ movew %sp@(PT_VECTOR), %d0
+ and.l #0x3ff, %d0
+ lsr.l #0x02, %d0
+
+ movel %sp,%sp@-
+ movel %d0,%sp@- /* put vector # on stack*/
+ jbsr process_int /* process the IRQ*/
+3: addql #8,%sp /* pop parameters off stack*/
+ bra ret_from_interrupt
+
+ret_from_interrupt:
+ subql #1,local_irq_count
+ jeq 1f
+2:
+ RESTORE_ALL
+1:
+ moveb %sp@(PT_SR), %d0
+ and #7, %d0
+ jhi 2b
+ /* check if we need to do software interrupts */
+
+ movel irq_stat+CPUSTAT_SOFTIRQ_PENDING,%d0
+ jeq ret_from_exception
+
+ pea ret_from_exception
+ jra do_softirq
+
+
+/*
+ * Handler for uninitialized and spurious interrupts.
+ */
+bad_interrupt:
+ addql #1,num_spurious
+ rte
+
+/*
+ * Beware - when entering resume, prev (the current task) is
+ * in a0, next (the new task) is in a1,so don't change these
+ * registers until their contents are no longer needed.
+ */
+ENTRY(resume)
+ movel %a0,%d1 /* save prev thread in d1 */
+ movew %sr,%a0@(TASK_THREAD+THREAD_SR) /* save sr */
+ movel %usp,%a2 /* save usp */
+ movel %a2,%a0@(TASK_THREAD+THREAD_USP)
+
+ SAVE_SWITCH_STACK
+ movel %sp,%a0@(TASK_THREAD+THREAD_KSP) /* save kernel stack */
+ movel %a1@(TASK_THREAD+THREAD_KSP),%sp /* restore new thread stack */
+ RESTORE_SWITCH_STACK
+
+ movel %a1@(TASK_THREAD+THREAD_USP),%a0 /* restore user stack */
+ movel %a0,%usp
+ movew %a1@(TASK_THREAD+THREAD_SR),%sr /* restore thread status reg */
+ rts
+