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/mips/kernel/entry.S b/arch/mips/kernel/entry.S
new file mode 100644
index 0000000..5eb4291
--- /dev/null
+++ b/arch/mips/kernel/entry.S
@@ -0,0 +1,155 @@
+/*
+ * 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 <linux/config.h>
+
+#include <asm/asm.h>
+#include <asm/asmmacro.h>
+#include <asm/regdef.h>
+#include <asm/mipsregs.h>
+#include <asm/stackframe.h>
+#include <asm/isadep.h>
+#include <asm/thread_info.h>
+#include <asm/war.h>
+
+#ifdef CONFIG_PREEMPT
+ .macro preempt_stop reg=t0
+ .endm
+#else
+ .macro preempt_stop reg=t0
+ local_irq_disable \reg
+ .endm
+#define resume_kernel restore_all
+#endif
+
+ .text
+ .align 5
+FEXPORT(ret_from_exception)
+ preempt_stop
+FEXPORT(ret_from_irq)
+ LONG_L t0, PT_STATUS(sp) # returning to kernel mode?
+ andi t0, t0, KU_USER
+ beqz t0, resume_kernel
+
+FEXPORT(resume_userspace)
+ local_irq_disable t0 # make sure we dont miss an
+ # interrupt setting need_resched
+ # between sampling and return
+ LONG_L a2, TI_FLAGS($28) # current->work
+ andi a2, _TIF_WORK_MASK # (ignoring syscall_trace)
+ bnez a2, work_pending
+ j restore_all
+
+#ifdef CONFIG_PREEMPT
+ENTRY(resume_kernel)
+ 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
+ li t0, PREEMPT_ACTIVE
+ sw t0, TI_PRE_COUNT($28)
+ local_irq_enable t0
+ jal schedule
+ sw zero, TI_PRE_COUNT($28)
+ local_irq_disable t0
+ b need_resched
+#endif
+
+FEXPORT(ret_from_fork)
+ jal schedule_tail # a0 = task_t *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
+ RESTORE_SOME
+ RESTORE_SP_AND_RET
+ .set at
+
+FEXPORT(work_pending)
+ andi t0, a2, _TIF_NEED_RESCHED
+ beqz t0, work_notifysig
+work_resched:
+ jal schedule
+
+ local_irq_disable t0 # 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 restore_all
+
+FEXPORT(syscall_exit_work_partial)
+ SAVE_STATIC
+FEXPORT(syscall_exit_work)
+ LONG_L t0, TI_FLAGS($28)
+ li t1, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT
+ and t0, t1
+ beqz t0, work_pending # trace bit is 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
+
+/*
+ * Common spurious interrupt handler.
+ */
+ .text
+ .align 5
+LEAF(spurious_interrupt)
+ /*
+ * Someone tried to fool us by sending an interrupt but we
+ * couldn't find a cause for it.
+ */
+#ifdef CONFIG_SMP
+ lui t1, %hi(irq_err_count)
+1: ll t0, %lo(irq_err_count)(t1)
+ addiu t0, 1
+ sc t0, %lo(irq_err_count)(t1)
+#if R10000_LLSC_WAR
+ beqzl t0, 1b
+#else
+ beqz t0, 1b
+#endif
+#else
+ lui t1, %hi(irq_err_count)
+ lw t0, %lo(irq_err_count)(t1)
+ addiu t0, 1
+ sw t0, %lo(irq_err_count)(t1)
+#endif
+ j ret_from_irq
+ END(spurious_interrupt)