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  1. Nov 06, 2016
    • Heesub Shin's avatar
      ARMv7-R: fix to restore the Thumb flag in CPSR · bda7d9ee
      Heesub Shin authored
      
      
      Thumb flag in CPSR is not restored back when the context switch occurs
      while executing thumb instruction.
      
      Reported-by: default avatarEunbong Song <eunb.song@samsung.com>
      Signed-off-by: default avatarByoungtae Cho <bt.cho@samsung.com>
      Signed-off-by: default avatarHeesub Shin <heesub.shin@samsung.com>
      bda7d9ee
    • Heesub Shin's avatar
      ARMv7-R: fix CPSR corruption after exception handling · 343243c7
      Heesub Shin authored
      
      
      A sporadic hang with consequent crash is observed when booting:
      
          arm_prefetchabort: Prefetch abort. PC: 04d34a00 IFAR: 04d34a00 IFSR: 00000008
          up_assert: Assertion failed at file:armv7-r/arm_prefetchabort.c line: 87 task: init
          up_dumpstate: Current sp: 004c3df0
          up_dumpstate: Interrupt stack:
          up_dumpstate:   base: 004c05fc
          up_dumpstate:   size: 00000800
          up_dumpstate: User stack:
          up_dumpstate:   base: 004c3f58
          up_dumpstate:   size: 00000fec
          up_dumpstate: User Stack
          up_stackdump: 004c3de0: 004a0d14 004c3df0 004c3f58 004a0d20 00000057 004c2c58 09000000 004a42a4
          up_stackdump: 004c3e00: 00000003 004c3e10 004a0f1c 004bbcef 33c44b00 004a0f28 04d34a00 00000008
          up_stackdump: 004c3e20: 00000008 004a01bc 004bfd38 00000001 00007fff 00000001 34134a00 d83e4c00
          up_stackdump: 004c3e40: 09000000 00000000 33c44b00 d83e4c00 0c3f4c00 00000000 00000000 00000003
          up_stackdump: 004c3e60: 004c3e70 004a1494 04d34a00 200b0253 004c3ed8 004a5298 004c3ed8 6d00006d
          up_stackdump: 004c3e80: 0000006d 004bc3f4 00000009 004a4f64 00000009 b9e0784f 333f3ed0 69d4227d
          up_stackdump: 004c3ea0: d81f09bd 0f867344 5a7e2c12 8acefd34 5d00dc1b 004bc432 004c3f08 004c0e08
          up_stackdump: 004c3ec0: 00000000 00000000 00000000 00000000 00000000 004a4210 004a5258 004a5300
          up_stackdump: 004c3ee0: 00000000 00000001 ffffffff 004c3f80 000002b0 004a4234 00000007 004c3f08
          up_stackdump: 004c3f00: 004a58b4 004bc432 004bc3f4 004c3f80 000002b0 0000029c 00000000 0000029c
          up_stackdump: 004c3f20: 00000000 004a5900 0000ff01 00000000 00000000 004a61f4 00000000 004a5fa4
          up_stackdump: 004c3f40: 00000000 004a5f6c 00000000 004a2668 00000000 00000000 b7509f04 004c3f64
          up_registerdump: R0: 00000001 00007fff 00000001 34134a00 d83e4c00 09000000 00000000 33c44b00
          up_registerdump: R8: d83e4c00 0c3f4c00 00000000 00000000 00000003 004c3e70 004a1494 04d34a00
          up_registerdump: CPSR: 200b0253
      
      It seems to be caused by the corrupted or wrong CPSR restored on return
      from exception. NuttX restores the context using code like this:
      
          msr spsr, r1
      
      GCC translates this to:
      
          msr spsr_fc, r1
      
      As a result, not all SPSR fields are updated on exception return. This
      should be:
      
          msr spsr_fsxc, r1
      
      On some evaluation boards, spsr_svc may have totally invalid value at
      power-on-reset. As it is not initialized at boot, the code above may
      result in the corruption of cpsr and thus unexpected behavior.
      
      Reported-by: default avatarEunbong Song <eunb.song@samsung.com>
      Signed-off-by: default avatarHeesub Shin <heesub.shin@samsung.com>
      343243c7
    • Heesub Shin's avatar
      ARMv7-R: fix typo in mpu support · 6bfc6b4d
      Heesub Shin authored
      
      
      s/ARMV7M/ARMV7R/g
      
      Reported-by: default avatarEunbong Song <eunb.song@samsung.com>
      Signed-off-by: default avatarHeesub Shin <heesub.shin@samsung.com>
      6bfc6b4d
    • Heesub Shin's avatar
      ARMv7-R: add cache handling functions · 003511d1
      Heesub Shin authored
      
      
      This commit adds functions for enabling and disabling d/i-caches which
      were missing for ARMv7-R.
      
      Signed-off-by: default avatarHeesub Shin <heesub.shin@samsung.com>
      003511d1
    • Heesub Shin's avatar
      ARMv7-R: add new Kconfig entries for d/i-cache · 6a1a8460
      Heesub Shin authored
      
      
      Unlike in ARMv7-A/M, Kconfig entries for data and instruction caches
      are currently missing in ARMv7-R. This commit adds those missing Kconfig
      entries. Actual implmenetation for those functions will be added in the
      subsequent patches.
      
      Signed-off-by: default avatarHeesub Shin <heesub.shin@samsung.com>
      6a1a8460
    • Heesub Shin's avatar
      ARMv7-R: remove the redundant update on SCTLR · 2b922fcd
      Heesub Shin authored
      
      
      mpu_control() is invoking cp15_wrsctlr() around SCTLR update
      redundantly.
      
      Signed-off-by: default avatarHeesub Shin <heesub.shin@samsung.com>
      2b922fcd
    • Heesub Shin's avatar
      ARMv7-R: fix invalid drbar handling · 05d47766
      Heesub Shin authored
      
      
      In ARMv7-R, [31:5] bits of DRBAR is physical base address and other bits
      are reserved and SBZ. Thus, there is no point in passing other than the
      base address.
      
      Signed-off-by: default avatarHeesub Shin <heesub.shin@samsung.com>
      05d47766
    • Heesub Shin's avatar
      ARMv7-R: fix compilation error · af6e4f59
      Heesub Shin authored
      
      
      This commit fixes compilation errors on MPU support for ARMv7-R.
      
      Signed-off-by: default avatarHeesub Shin <heesub.shin@samsung.com>
      af6e4f59
    • Heesub Shin's avatar
      ARMv7-R: fix typo · 96a200a7
      Heesub Shin authored
      
      
      fix trivial typo: s/ARMv7-A/ARMv7-R/
      
      Signed-off-by: default avatarHeesub Shin <heesub.shin@samsung.com>
      96a200a7
  2. Nov 05, 2016
  3. Nov 04, 2016
  4. Nov 03, 2016