1. 22 10月, 2014 1 次提交
    • D
      arm: socfpga: fix fetching cpu1start_addr for SMP · 3a4356c0
      Dinh Nguyen 提交于
      When CPU1 is brought out of reset, it's MMU is not turned on yet, so it will
      only be able to use physical addresses. For systems with that have the
      MMU page configured for 0xC0000000, 0x80000000, or 0x40000000
      "BIC 0x40000000" will work just fine, as it was just converting the
      virtual address of &cpu1start_addr into a physical address, ie. 0xC0000000
      became 0x80000000. So for systems where the SDRAM controller was able to do a
      wrap-around access, this was working fine, as it was just dropping the MSB,
      but for systems where out of bounds memory access is not allowed, this would
      not allow CPU1 to correctly fetch &cpu1start_addr.
      
      This patch fixes the secondary_trampoline code to correctly fetch the
      physical address of cpu1start_addr directly. The patch will subtract the
      correct PAGE_OFFSET from &cpu1start_addr. And since on this platform, the
      physical memory will always start at 0x0, subtracting PAGE_OFFSET from
      &cpu1start_addr will allow CPU1 to correctly fetch the value of cpu1start_addr.
      
      While at it, change the name of cpu1start_addr to socfpga_cpu1start_addr
      to avoid any future naming collisions for multiplatform image.
      Signed-off-by: NDinh Nguyen <dinguyen@opensource.altera.com>
      ---
      v4: Updated commit log to correctly lay out the usage of PAGE_OFFSET and
          add comments to the same effect.
      v3: Used PAGE_OFFSET to get the physical address
      v2: Correctly get the physical address instead of just a BIC hack.
      3a4356c0
  2. 15 7月, 2013 1 次提交
    • P
      arm: delete __cpuinit/__CPUINIT usage from all ARM users · 8bd26e3a
      Paul Gortmaker 提交于
      The __cpuinit type of throwaway sections might have made sense
      some time ago when RAM was more constrained, but now the savings
      do not offset the cost and complications.  For example, the fix in
      commit 5e427ec2 ("x86: Fix bit corruption at CPU resume time")
      is a good example of the nasty type of bugs that can be created
      with improper use of the various __init prefixes.
      
      After a discussion on LKML[1] it was decided that cpuinit should go
      the way of devinit and be phased out.  Once all the users are gone,
      we can then finally remove the macros themselves from linux/init.h.
      
      Note that some harmless section mismatch warnings may result, since
      notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c)
      and are flagged as __cpuinit  -- so if we remove the __cpuinit from
      the arch specific callers, we will also get section mismatch warnings.
      As an intermediate step, we intend to turn the linux/init.h cpuinit
      related content into no-ops as early as possible, since that will get
      rid of these warnings.  In any case, they are temporary and harmless.
      
      This removes all the ARM uses of the __cpuinit macros from C code,
      and all __CPUINIT from assembly code.  It also had two ".previous"
      section statements that were paired off against __CPUINIT
      (aka .section ".cpuinit.text") that also get removed here.
      
      [1] https://lkml.org/lkml/2013/5/20/589
      
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: linux-arm-kernel@lists.infradead.org
      Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
      8bd26e3a
  3. 12 2月, 2013 1 次提交
  4. 07 11月, 2012 1 次提交
    • A
      ARM: socfpga: mark secondary_trampoline as cpuinit · 9560f840
      Arnd Bergmann 提交于
      The socfpga_boot_secondary is correctly marked as __cpuinit but references
      secondary_trampoline, which was introduced into the init section, causing
      this build warning:
      
      WARNING: vmlinux.o(.cpuinit.text+0xf90): Section mismatch in reference from the function socfpga_boot_secondary() to the variable .init.text:secondary_trampoline
      The function __cpuinit socfpga_boot_secondary() references
      a variable __init secondary_trampoline.
      If secondary_trampoline is only used by socfpga_boot_secondary then
      annotate secondary_trampoline with a matching annotation.
      
      The solution is to mark secondary_trampoline as cpuinit as well.
      Signed-off-by: NArnd Bergmann <arnd@arndb.de>
      9560f840
  5. 27 10月, 2012 1 次提交
  6. 26 10月, 2012 1 次提交