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  1. 30 9月, 2010 1 次提交
    • M
      sh: boot kernel with SR.BL set · 68a1aed7
      由 Magnus Damm 提交于 
      Update the SH kernel to keep SR.BL set until the VBR
register has been initialized. Useful to allow boot
of the kernel even though exceptions are pending.

Without this patch there is a window of time when
exceptions such as NMI are enabled but no exception
handlers are installed.

This patch modifies both the zImage loader and the
actual kernel to boot with BL=1, but the zImage
loader is modfied in such a way that the init_sr
value is unchanged to not break the zImage loader
provided by kexec.

Tested on sh7724 Ecovec and on the SH4AL-DSP core
included in sh7372.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      68a1aed7
  3. 31 5月, 2010 2 次提交
  5. 26 4月, 2010 2 次提交
  7. 03 3月, 2010 1 次提交
  9. 01 3月, 2010 1 次提交
  11. 18 2月, 2010 1 次提交
    • P
      sh: Merge legacy and dynamic PMB modes. · d01447b3
      由 Paul Mundt 提交于 
      This implements a bit of rework for the PMB code, which permits us to
kill off the legacy PMB mode completely. Rather than trusting the boot
loader to do the right thing, we do a quick verification of the PMB
contents to determine whether to have the kernel setup the initial
mappings or whether it needs to mangle them later on instead.

If we're booting from legacy mappings, the kernel will now take control
of them and make them match the kernel's initial mapping configuration.
This is accomplished by breaking the initialization phase out in to
multiple steps: synchronization, merging, and resizing. With the recent
rework, the synchronization code establishes page links for compound
mappings already, so we build on top of this for promoting mappings and
reclaiming unused slots.

At the same time, the changes introduced for the uncached helpers also
permit us to dynamically resize the uncached mapping without any
particular headaches. The smallest page size is more than sufficient for
mapping all of kernel text, and as we're careful not to jump to any far
off locations in the setup code the mapping can safely be resized
regardless of whether we are executing from it or not.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      d01447b3
  13. 16 2月, 2010 1 次提交
  15. 28 1月, 2010 1 次提交
    • P
      sh: Kill off superfluous sh_bios references from compressed loader. · abec86a8
      由 Paul Mundt 提交于 
      The VBR value needs to be initialized in order for any of the bios
trapping to work, and as we don't do that until slightly later in the
boot process, this has no real chance of working.

The only reason for using this in the past was due to the fact that early
serial initialization wasn't possible, but now that early sh-sci is
supported by everyone, there's no longer any reason to support the
sh_bios hacks in the first place. Given that, we just kill off the
references completely.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      abec86a8
  17. 13 1月, 2010 2 次提交
    • P
      sh: fixed PMB mode refactoring. · a0ab3668
      由 Paul Mundt 提交于 
      This introduces some much overdue chainsawing of the fixed PMB support.
fixed PMB was introduced initially to work around the fact that dynamic
PMB mode was relatively broken, though they were never intended to
converge. The main areas where there are differences are whether the
system is booted in 29-bit mode or 32-bit mode, and whether legacy
mappings are to be preserved. Any system booting in true 32-bit mode will
not care about legacy mappings, so these are roughly decoupled.

Regardless of the entry point, PMB and 32BIT are directly related as far
as the kernel is concerned, so we also switch back to having one select
the other.

With legacy mappings iterated through and applied in the initialization
path it's now possible to finally merge the two implementations and
permit dynamic remapping overtop of remaining entries regardless of
whether boot mappings are crafted by hand or inherited from the boot
loader.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      a0ab3668
    • P
      sh: Add support for LZO-compressed kernels. · c7b16efb
      由 Paul Mundt 提交于 
      Plugs in LZO along with the others.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      c7b16efb
  19. 04 12月, 2009 1 次提交
  21. 26 10月, 2009 1 次提交
  23. 10 10月, 2009 1 次提交
    • M
      sh: Obliterate the P1 area macros · 8bd642b1
      由 Matt Fleming 提交于 
      Replace the use of PHYSADDR() with __pa(). PHYSADDR() is based on the
idea that all addresses in P1SEG are untranslated, so we can access an
address's physical page as an offset from P1SEG. This doesn't work for
CONFIG_PMB/CONFIG_PMB_FIXED because pages in P1SEG and P2SEG are used
for PMB mappings and so can be translated to any physical address.

Likewise, replace a P1SEGADDR() use with virt_to_phys().
Signed-off-by: NMatt Fleming <matt@console-pimps.org>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      8bd642b1
  25. 20 9月, 2009 1 次提交
    • S
      kbuild: use INSTALLKERNEL to select customized installkernel script · caa27b66
      由 Sam Ravnborg 提交于 
      Replace the use of CROSS_COMPILE to select a customized
installkernel script with the possibility to set INSTALLKERNEL
to select a custom installkernel script when running make:

    make INSTALLKERNEL=arm-installkernel install

With this patch we are now more consistent across
different architectures - they did not all support use
of CROSS_COMPILE.

The use of CROSS_COMPILE was a hack as this really belongs
to gcc/binutils and the installkernel script does not change
just because we change toolchain.

The use of CROSS_COMPILE caused troubles with an upcoming patch
that saves CROSS_COMPILE when a kernel is built - it would no
longer be installable.
[Thanks to Peter Z. for this hint]

This patch undos what Ian did in commit:

  0f8e2d62
  ("use ${CROSS_COMPILE}installkernel in arch/*/boot/install.sh")

The patch has been lightly tested on x86 only - but all changes
looks obvious.
Acked-by: NPeter Zijlstra <peterz@infradead.org>
Acked-by: Mike Frysinger <vapier@gentoo.org> [blackfin]
Acked-by: Russell King <linux@arm.linux.org.uk> [arm]
Acked-by: Paul Mundt <lethal@linux-sh.org> [sh]
Acked-by: "H. Peter Anvin" <hpa@zytor.com> [x86]
Cc: Ian Campbell <icampbell@arcom.com>
Cc: Tony Luck <tony.luck@intel.com> [ia64]
Cc: Fenghua Yu <fenghua.yu@intel.com> [ia64]
Cc: Hirokazu Takata <takata@linux-m32r.org> [m32r]
Cc: Geert Uytterhoeven <geert@linux-m68k.org> [m68k]
Cc: Kyle McMartin <kyle@mcmartin.ca> [parisc]
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> [powerpc]
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> [s390]
Cc: Thomas Gleixner <tglx@linutronix.de> [x86]
Cc: Ingo Molnar <mingo@redhat.com> [x86]
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
      caa27b66
  27. 24 8月, 2009 1 次提交
    • S
      sh: Remove implicit sign extension from assembler immediates · fea966f7
      由 Stuart Menefy 提交于 
      The SH instruction set has several instructions which accept an 8 bit
immediate operand. For logical instructions this operand is zero extended,
for arithmetic instructions the operand is sign extended. After adding an
option to the assembler to check this, it was found that several pieces
of assembly code were assuming this behaviour, and in one case
getting it wrong.

So this patch explicitly sign extends any immediate operands, which makes
it obvious what is happening, and fixes the one case which got it wrong.
Signed-off-by: NStuart Menefy <stuart.menefy@st.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      fea966f7
  29. 07 8月, 2009 1 次提交
  31. 29 7月, 2009 1 次提交
  33. 21 7月, 2009 1 次提交
  35. 12 7月, 2009 5 次提交
  37. 11 7月, 2009 1 次提交
    • P
      sh: Decouple mcount from ftrace. · 473d1cf4
      由 Paul Mundt 提交于 
      This adds a general CONFIG_MCOUNT in order to permit mcount generation
without ftrace support. This is primarily for allowing platforms to
enable aggressive stack overflow checking without having to enable ftrace
support. Based on the sparc64 implementation.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      473d1cf4
  39. 09 5月, 2009 4 次提交
  41. 10 3月, 2009 1 次提交
  43. 31 10月, 2008 1 次提交
  45. 21 9月, 2008 1 次提交
  47. 08 9月, 2008 3 次提交
  49. 29 7月, 2008 2 次提交
  51. 28 7月, 2008 2 次提交