diff options
| author | Aaron Durbin <adurbin@chromium.org> | 2013-10-10 12:47:47 -0500 |
|---|---|---|
| committer | Aaron Durbin <adurbin@google.com> | 2014-02-13 16:55:45 +0100 |
| commit | 1ce0b3022c723ca7c9f00cc884e8e3282cb0dcdb (patch) | |
| tree | 2eb14a91ab78b2c43c579b178c683507bcbd97a7 | |
| parent | dc249f690a46f00ae11bedd080a749d6f1e8df3e (diff) | |
baytrail: allow downstream use of SSE instructions
If a payload is compiled to use SSE instructions it will
fault with an undefined opcode because SSE instructions weren't
enabled. Therefore enable SSE instructions at runtime.
BUG=chrome-os-partner:22991
BRANCH=None
TEST=Built and booted with SSE enabled payload. No exceptions seen.
Change-Id: I919c1ad319c6ce8befec5b4b1fd8c6343d51ccc1
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/172642
Reviewed-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/4881
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
| -rw-r--r-- | src/soc/intel/baytrail/ramstage.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/soc/intel/baytrail/ramstage.c b/src/soc/intel/baytrail/ramstage.c index 10c030fcb3..229e3679df 100644 --- a/src/soc/intel/baytrail/ramstage.c +++ b/src/soc/intel/baytrail/ramstage.c @@ -20,6 +20,7 @@ #include <arch/cpu.h> #include <console/console.h> #include <cpu/intel/microcode.h> +#include <cpu/x86/cr.h> #include <cpu/x86/msr.h> #include <device/device.h> #include <device/pci_def.h> @@ -109,6 +110,9 @@ void baytrail_init_pre_device(void) fill_in_pattrs(); + /* Allow for SSE instructions to be executed. */ + write_cr4(read_cr4() | CR4_OSFXSR | CR4_OSXMMEXCPT); + /* Get GPIO initial states from mainboard */ config = mainboard_get_gpios(); setup_soc_gpios(config); |