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This patch contains the following cleanups:
- make the following needlessly global code static:
- entry.S: resume_userspace
- process.c: pm_idle
- process.c: default_idle()
- smp.c: send_IPI_allbutself()
- time.c: timer_interrupt()
- time.c: struct irq0
- traps.c: set_eit_vector_entries()
- traps.c: kstack_depth_to_print
- traps.c: show_trace()
- traps.c: die_lock
- remove the following unused code:
- head.S: startup_32
- process.c: hlt_counter
- process.c: disable_hlt()
- process.c: enable_hlt()
- process.c: dump_task_regs()
- remove the following variables and their usages since they were
always 0:
- irq.c: irq_err_count
- irq.c: irq_mis_count
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
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The names of STI and CLI macros were derived from i386 arch historically,
but their name are incomprehensible.
So, for easy to understand, rename these macros to ENABLE_INTERRUPTS
and DISABLE_INTERRUPTS, respectively.
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
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This patch fixes the following compile error:
<-- snip -->
...
AS arch/m32r/kernel/entry.o
/home/bunk/linux/kernel-2.6/linux-2.6.23-rc3-mm1/arch/m32r/kernel/entry.S: Assembler messages:
/home/bunk/linux/kernel-2.6/linux-2.6.23-rc3-mm1/arch/m32r/kernel/entry.S:358: Error: bad instruction `addi r0,#(((((0)+(64))+(32))+(32)))'
make[2]: *** [arch/m32r/kernel/entry.o] Error 1
<-- snip -->
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Cc: Adrian Bunk <bunk@kernel.org>
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- Separate sys_call_table from arch/m32r/kernel/entry.S and
move it to arch/m32r/kernel/system_call.S.
- Change sys_call_table section from .data to .rodata.
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
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- Remove unused symbols *_MASK
- Change indentation of comments, etc.
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
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If no IRQ request is found in the IRQ check of ei_handler,
we can exit directly by jumping "restore_all", instead of via
"ret_from_intr".
This modification is also likely effective for IPI operations,
because scheduler call never happen at the exit of IPIs.
Signed-off-by: Hitoshi Yamamoto <hitoshiy@linux-m32r.org>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
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Simplify and clean up messy ei_handler code in arch/m32r/kernel/entry.S.
- Remove ifdef's for CONFIG_CHIP_* configulations.
- Rearrange the M32700 workaround code.
- Remove the messy platform-dependent interrupt check routines and
consolidate them to common INT0/INT1/INT2 check routines for all
platforms with cascaded interrupt controllers.
Signed-off-by: Hitoshi Yamamoto <hitoshiy@linux-m32r.org>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
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Don't mask the lower 12-bit of the page fault address.
In the current m32r kernel implementation, we use an access exception
to detect page faults.
This patch fixes ace_handler (access exception handler) for m32r. In order to
check userspace address in do_page_fault, we have to pass full 32-bit address
to do_page_fault.
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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The m32r kernel 2.6.18-rc1 or after cause build errors of "unknown isa
configuration" for userspace application programs, such as glibc, gdb, etc.
This is because the recent kernel do not include linux/config.h not to expose
kernel headers for userspace.
To fix the above compile errors, this patch fixes two headers ptrace.h and
sigcontext.h for m32r and makes them platform-independent.
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
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- Remove unnecessary push/pop's of the switch_to() macro
for performance tuning.
- Cosmetic updates: change __inline__ to inline, etc.
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Cc: NIIBE Yutaka <gniibe@fsij.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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This modification is required to fix debugging function for m32r targets
with !CONFIG_ISA_DSP_LEVEL2, by unifying 'struct pt_regs' and 'struct
sigcontext' size for all M32R ISA.
Some m32r processor core with !CONFIG_ISA_DSP_LEVEL2 configuration has only
single accumulator a0 (ex. VDEC2 core, M32102 core, etc.), the others with
CONFIG_ISA_DSP_LEVEL2 has two accumulators, a0 and a1.
This means there are two variations of thread context. So far, we reduced
and changed stackframe size at a syscall for their context size. However,
this causes a problem that a GDB for processors with CONFIG_ISA_DSP_LEVEL2
cannot be used for processors with !CONFIG_ISA_DSP_LEVEL2.
From the viewpoint of GDB support, we should reduce such variation of
stackframe size for simplicity.
In this patch, dummy members are added to 'struct pt_regs' and 'struct
sigcontext' to adjust their size for !CONFIG_ISA_DSP_LEVEL2.
This modification is also a one step for a GDB update in future.
Currently, on the m32r, GDB can access process's context by using ptrace
functions in a simple way of register by register access. By unifying
stackframe size, we have a possibility to make use of ptrace functions of
not only a single register access but also block register access,
PTRACE_{GETREGS,PUTREGS}.
However, for this purpose, we might have to modify stackframe structure
some more; for example, PSW (processor status word) register should be
pre-processed before pushing to stack at a syscall, and so on. In this
case, we must update carefully both kernel and GDB at a time...
Signed-off-by: Hayato Fujiwara <fujiwara@linux-m32r.org>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Cc: Kei Sakamoto <ksakamot@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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This patch is for supporting a new target platform, Renesas M32104UT
evaluation board.
The M32104UT is an eval board based on an uT-Engine specification. This board
has an MMU-less M32R family processor, M32104.
http://www-wa0.personal-media.co.jp/pmc/archive/te/te_m32104_e.pdf
This board is one of the most popular M32R platform, so we have ported
Linux/M32R to it.
Signed-off-by: Naoto Sugai <Sugai.Naoto@ak.MitsubishiElectric.co.jp>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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A trivial fix to remove unused instructions.
Signed-off-by: Naoto Sugai <Sugai.Naoto@ak.MitsubishiElectric.co.jp>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Remove unused instructions for debugging.
Signed-off-by: Naoto Sugai <sugai@isl.melco.co.jp>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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This patch prevents illegal traps from causing m32r kernel's infinite loop
execution.
Signed-off-by: Naoto Sugai <sugai@isl.melco.co.jp>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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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!
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