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system.h

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    • Marek Vasut's avatar
      a592e6fb
      arm: Replace test for CONFIG_ARMV7 with CONFIG_CPU_V7 · a592e6fb
      Marek Vasut authored
      
      The arch/arm/lib/cache-cp15.c checks for CONFIG_ARMV7 and if this macro is
      set, it configures TTBR0 register. This register must be configured for the
      cache on ARMv7 to operate correctly.
      
      The problem is that noone actually sets the CONFIG_ARMV7 macro and thus the
      TTBR0 is not configured at all. On SoCFPGA, this produces all sorts of minor
      issues which are hard to replicate, for example certain USB sticks are not
      detected or QSPI NOR sometimes fails to write pages completely.
      
      The solution is to replace CONFIG_ARMV7 test with CONFIG_CPU_V7 one. This is
      correct because the code which added the test(s) for CONFIG_ARMV7 was added
      shortly after CONFIG_ARMV7 was replaced by CONFIG_CPU_V7 and this code was
      not adjusted correctly to reflect that change.
      
      Signed-off-by: default avatarMarek Vasut <marex@denx.de>
      Cc: Tom Rini <trini@konsulko.com>
      Cc: Albert Aribaud <albert.u.boot@aribaud.net>
      Cc: Simon Glass <sjg@chromium.org>
      a592e6fb
      History
      arm: Replace test for CONFIG_ARMV7 with CONFIG_CPU_V7
      Marek Vasut authored
      
      The arch/arm/lib/cache-cp15.c checks for CONFIG_ARMV7 and if this macro is
      set, it configures TTBR0 register. This register must be configured for the
      cache on ARMv7 to operate correctly.
      
      The problem is that noone actually sets the CONFIG_ARMV7 macro and thus the
      TTBR0 is not configured at all. On SoCFPGA, this produces all sorts of minor
      issues which are hard to replicate, for example certain USB sticks are not
      detected or QSPI NOR sometimes fails to write pages completely.
      
      The solution is to replace CONFIG_ARMV7 test with CONFIG_CPU_V7 one. This is
      correct because the code which added the test(s) for CONFIG_ARMV7 was added
      shortly after CONFIG_ARMV7 was replaced by CONFIG_CPU_V7 and this code was
      not adjusted correctly to reflect that change.
      
      Signed-off-by: default avatarMarek Vasut <marex@denx.de>
      Cc: Tom Rini <trini@konsulko.com>
      Cc: Albert Aribaud <albert.u.boot@aribaud.net>
      Cc: Simon Glass <sjg@chromium.org>