Eric Lee / smarc-fsl-linux-kernel

07 Jul, 2011

1 commit

28 Oct, 2010

1 commit

  • c8c90860c   ARM: 6466/1: implement flush_icache_all for the rest of the CPUs ... Browse Code »

    Commit 81d11955bf0 ("ARM: 6405/1: Handle __flush_icache_all for
    CONFIG_SMP_ON_UP") added a new function to struct cpu_cache_fns:
    flush_icache_all(). It also implemented this for v6 and v7 but not
    for v5 and backwards. Without the function pointer in place, we
    will be calling wrong cache functions.

    For example with ep93xx we get following:

    Unable to handle kernel paging request at virtual address ee070f38
    pgd = c0004000
    [ee070f38] *pgd=00000000
    Internal error: Oops: 80000005 [#1] PREEMPT
    last sysfs file:
    Modules linked in:
    CPU: 0 Not tainted (2.6.36+ #1)
    PC is at 0xee070f38
    LR is at __dma_alloc+0x11c/0x2d0
    pc : [] lr : [] psr: 60000013
    sp : c581bde0 ip : 00000000 fp : c0472000
    r10: c0472000 r9 : 000000d0 r8 : 00020000
    r7 : 0001ffff r6 : 00000000 r5 : c0472400 r4 : c5980000
    r3 : c03ab7e0 r2 : 00000000 r1 : c59a0000 r0 : c5980000
    Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
    Control: c000717f Table: c0004000 DAC: 00000017
    Process swapper (pid: 1, stack limit = 0xc581a270)
    [] (__dma_alloc+0x11c/0x2d0)
    [] (dma_alloc_writecombine+0x1c/0x24)
    [] (ep93xx_pcm_preallocate_dma_buffer+0x44/0x60)
    [] (ep93xx_pcm_new+0x5c/0x88)
    [] (snd_soc_instantiate_cards+0x8a8/0xbc0)
    [] (soc_probe+0xfc/0x134)
    [] (platform_drv_probe+0x18/0x1c)
    [] (driver_probe_device+0xb0/0x16c)
    [] (bus_for_each_drv+0x48/0x84)
    [] (device_attach+0x50/0x68)
    [] (bus_probe_device+0x24/0x44)
    [] (device_add+0x2fc/0x44c)
    [] (platform_device_add+0x104/0x15c)
    [] (simone_init+0x60/0x94)
    [] (do_one_initcall+0xd0/0x1a4)

    __dma_alloc() calls (inlined) __dma_alloc_buffer() which ends up
    calling dmac_flush_range(). Now since the entries in the
    arm920_cache_fns are shifted by one, we jump into address 0xee070f38
    which is actually next instruction after the arm920_cache_fns
    structure.

    So implement flush_icache_all() for the rest of the supported CPUs
    using a generic 'invalidate I cache' instruction.

    Signed-off-by: Mika Westerberg
    Signed-off-by: Russell King

    Mika Westerberg
     

15 Feb, 2010

2 commits

14 Dec, 2009

1 commit

29 Nov, 2008

1 commit

07 Aug, 2008

2 commits

17 Apr, 2005

1 commit

  • 1da177e4c   Linux-2.6.12-rc2 ... Browse Code »

    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!

    Linus Torvalds