diff options
| author | Stephen Boyd <sboyd@codeaurora.org> | 2011-03-24 00:46:15 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-03-28 22:01:43 +0400 |
| commit | dfad549d98b60160547d1b8299051b9456c8da85 (patch) | |
| tree | 3920e4931669c67e0f06955dfc667ee3aa0d566c /arch/arm/kernel/debug.S | |
| parent | 8e8806990cfd91a4ec25df6f00528008c4b0087a (diff) | |
| download | linux-dfad549d98b60160547d1b8299051b9456c8da85.tar.xz | |
ARM: 6826/1: Merge v6 and v7 DEBUG_LL DCC support
The inline assembly differences for v6 vs. v7 are purely
optimizations. On a v7 processor, an mrc with the pc sets the
condition codes to the 28-31 bits of the register being read. It
just so happens that the TX/RX full bits the DCC support code is
testing for are high enough in the register to be put into the
condition codes. On a v6 processor, this "feature" isn't
implemented and thus we have to do the usual read, mask, test
operations to check for TX/RX full. Thus, we can drop the v7
implementation and just use the v6 implementation for both.
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel/debug.S')
| -rw-r--r-- | arch/arm/kernel/debug.S | 19 |
1 files changed, 1 insertions, 18 deletions
diff --git a/arch/arm/kernel/debug.S b/arch/arm/kernel/debug.S index d2d983be096d..bcd66e00bdbe 100644 --- a/arch/arm/kernel/debug.S +++ b/arch/arm/kernel/debug.S @@ -25,7 +25,7 @@ .macro addruart, rp, rv .endm -#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) +#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7) .macro senduart, rd, rx mcr p14, 0, \rd, c0, c5, 0 @@ -49,23 +49,6 @@ 1002: .endm -#elif defined(CONFIG_CPU_V7) - - .macro senduart, rd, rx - mcr p14, 0, \rd, c0, c5, 0 - .endm - - .macro busyuart, rd, rx -busy: mrc p14, 0, pc, c0, c1, 0 - bcs busy - .endm - - .macro waituart, rd, rx -wait: mrc p14, 0, pc, c0, c1, 0 - bcs wait - - .endm - #elif defined(CONFIG_CPU_XSCALE) .macro senduart, rd, rx |