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| author | Max Filippov <jcmvbkbc@gmail.com> | 2015-09-24 22:11:53 +0200 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2015-11-02 16:02:47 +0100 |
| commit | 5029615e25dc5040beb065f36743c127a8e51497 (patch) | |
| tree | 8b77e020c58e01175587f5267ab9ab8b223c3652 /arch/xtensa/platforms | |
| parent | Linux 4.3 (diff) | |
| download | linux-5029615e25dc5040beb065f36743c127a8e51497.tar.xz linux-5029615e25dc5040beb065f36743c127a8e51497.zip | |
xtensa: fixes for configs without loop option
Build-time fixes:
- make lbeg/lend/lcount save/restore conditional on kernel entry;
- don't clear lcount in platform_restart functions unconditionally.
Run-time fixes:
- use correct end of range register in __endla paired with __loopt, not
the unused temporary register. This fixes .bss zero-initialization.
Update comments in asmmacro.h;
- don't clobber a10 in the usercopy that leads to access to unmapped
memory.
Cc: <stable@vger.kernel.org>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa/platforms')
| -rw-r--r-- | arch/xtensa/platforms/iss/setup.c | 2 | ||||
| -rw-r--r-- | arch/xtensa/platforms/xt2000/setup.c | 2 | ||||
| -rw-r--r-- | arch/xtensa/platforms/xtfpga/setup.c | 2 |
3 files changed, 6 insertions, 0 deletions
diff --git a/arch/xtensa/platforms/iss/setup.c b/arch/xtensa/platforms/iss/setup.c index da7d18240866..391820539f0a 100644 --- a/arch/xtensa/platforms/iss/setup.c +++ b/arch/xtensa/platforms/iss/setup.c @@ -61,7 +61,9 @@ void platform_restart(void) #if XCHAL_NUM_IBREAK > 0 "wsr a2, ibreakenable\n\t" #endif +#if XCHAL_HAVE_LOOPS "wsr a2, lcount\n\t" +#endif "movi a2, 0x1f\n\t" "wsr a2, ps\n\t" "isync\n\t" diff --git a/arch/xtensa/platforms/xt2000/setup.c b/arch/xtensa/platforms/xt2000/setup.c index b90555cb8089..87678961a8c8 100644 --- a/arch/xtensa/platforms/xt2000/setup.c +++ b/arch/xtensa/platforms/xt2000/setup.c @@ -72,7 +72,9 @@ void platform_restart(void) #if XCHAL_NUM_IBREAK > 0 "wsr a2, ibreakenable\n\t" #endif +#if XCHAL_HAVE_LOOPS "wsr a2, lcount\n\t" +#endif "movi a2, 0x1f\n\t" "wsr a2, ps\n\t" "isync\n\t" diff --git a/arch/xtensa/platforms/xtfpga/setup.c b/arch/xtensa/platforms/xtfpga/setup.c index b4cf70e535ab..e9f65f79cf2e 100644 --- a/arch/xtensa/platforms/xtfpga/setup.c +++ b/arch/xtensa/platforms/xtfpga/setup.c @@ -63,7 +63,9 @@ void platform_restart(void) #if XCHAL_NUM_IBREAK > 0 "wsr a2, ibreakenable\n\t" #endif +#if XCHAL_HAVE_LOOPS "wsr a2, lcount\n\t" +#endif "movi a2, 0x1f\n\t" "wsr a2, ps\n\t" "isync\n\t" |