Rewrite inline assembly for ARMv7+ to correctly annotate inputs and
outputs. On ARM GCC 6.1.1, this causes assembly output to change from
the incorrect
@ r0 is allocated to hold dst and x0
@ r1 is allocated to hold src and x1
ldr r0, [r1] @ clobbers dst!
ldr r1, [r1, #4]
str r0, [r0]
str r1, [r0, #4]
to the correct
@ r0 is allocated to hold dst
@ r1 is allocated to hold src and x1
@ r3 is allocated to hold x0
ldr r3, [r1]
ldr r1, [r1, #4]
str r3, [r0]
str r1, [r0, #4]
Also modify checkpatch.pl to ignore spaces before opening brackets when
used in inline assembly.
Change-Id: I255995f5e0a7b1a95375258755a93972c51d79b8
Signed-off-by: Benjamin Barenblat <bbaren@google.com>
Reviewed-on: https://review.coreboot.org/15216
Tested-by: build bot (Jenkins)
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: https://chromium-review.googlesource.com/356445
Commit-Ready: Furquan Shaikh <furquan@chromium.org>
Tested-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
From the User-Level ISA Specification v2.0:
"We do not mandate atomicity for misaligned accesses so simple
implementations can just use a machine trap and software handler to
handle misaligned accesses." ( http://riscv.org/specifications/)
Spike traps on unaligned accesses.
Change-Id: Ia57786916f4076cc08513f4e331c2deec9cfa785
Original-Signed-off-by: Jonathan Neuschfer <j.neuschaefer@gmx.net>
Original-Reviewed-on: https://review.coreboot.org/14983
Original-Tested-by: build bot (Jenkins)
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
(cherry-picked from commit 4acb0e7742)
Signed-off-by: Martin Roth <martinroth@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/348411
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
__asm__ is more robust to compilation flags.
Change-Id: Ic7ca6e38ddd439dcfc4a62ef272ecea62416b4be
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: https://review.coreboot.org/13905
Tested-by: build bot (Jenkins)
Reviewed-by: Julius Werner <jwerner@chromium.org>
The missing braces for access to a union member
cause an error on gcc versions < 4.6.
Change-Id: I7de14a6d89219f5376f4f969adecfe8014a5a9d8
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/13776
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Commit 09f2921b (cbfs: Add LZ4 in-place decompression support for
pre-RAM stages) breaks building cbfstool with gcc (Debian 4.9.2-10)
4.9.2 in Debian 8.3 (jessie) with a 32-bit user space. It works fine
in a 64-bit user space.
```
/home/joey/src/coreboot/src/commonlib/lz4_wrapper.c:164:18: note: in expansion of macro 'MIN'
size_t size = MIN((uint32_t)b.size, dst + dstn - out);
^
/home/joey/src/coreboot/src/commonlib/include/commonlib/helpers.h:29:35: error: signed and unsigned type in conditional expression [-Werror=sign-compare]
#define MIN(a,b) ((a) < (b) ? (a) : (b))
^
```
The problem is arithmetic on void*, so explicitly cast to the wanted
types as suggested by user *redi* in #gcc@irc.freenode.net.
Change-Id: I85bee25a69c432ef8bb934add7fd2e2e31f03662
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: https://review.coreboot.org/13771
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
This patch ports the LZ4 decompression code that debuted in libpayload
last year to coreboot for use in CBFS stages (upgrading the base
algorithm to LZ4's dev branch to access the new in-place decompression
checks). This is especially useful for pre-RAM stages in constrained
SRAM-based systems, which previously could not be compressed due to
the size requirements of the LZMA scratchpad and bounce buffer. The
LZ4 algorithm offers a very lean decompressor function and in-place
decompression support to achieve roughly the same boot speed gains
(trading compression ratio for decompression time) with nearly no
memory overhead.
For now we only activate it for the stages that had previously not been
compressed at all on non-XIP (read: non-x86) boards. In the future we
may also consider replacing LZMA completely for certain boards, since
which algorithm wins out on boot speed depends on board-specific
parameters (architecture, processor speed, SPI transfer rate, etc.).
BRANCH=None
BUG=None
TEST=Built and booted Oak, Jerry, Nyan and Falco. Measured boot time on
Oak to be about ~20ms faster (cutting load times for affected stages
almost in half).
Change-Id: Iec256c0e6d585d1b69985461939884a54e3ab900
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/13638
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
