diff options
| author | Simon Glass <sjg@chromium.org> | 2020-07-02 21:12:12 -0600 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2020-07-09 12:33:24 +0800 |
| commit | 3dada5a1a89f336f4b751548117949cf255cfcf6 (patch) | |
| tree | 3694a1863dae64f0ef7c4363d8cf607b52340cb7 /arch/x86/cpu/i386 | |
| parent | 61608f395e7dcb2be6060407a72a1149b046430a (diff) | |
x86: fsp: Reinit the FPU after FSP meminit
The APL FSP appears to leave the FPU in a bad state in that it has
registers in use. This causes an error when the next FPU operation is
performed.
Work around this by re-resetting the FPU after calling FSP-M. This allows
the freetype console to work correctly.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'arch/x86/cpu/i386')
| -rw-r--r-- | arch/x86/cpu/i386/cpu.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/cpu/i386/cpu.c b/arch/x86/cpu/i386/cpu.c index 435e50edad..d27324cb4e 100644 --- a/arch/x86/cpu/i386/cpu.c +++ b/arch/x86/cpu/i386/cpu.c @@ -363,6 +363,11 @@ static void setup_cpu_features(void) : : "i" (em_rst), "i" (mp_ne_set) : "eax"); } +void cpu_reinit_fpu(void) +{ + asm ("fninit\n"); +} + static void setup_identity(void) { /* identify CPU via cpuid and store the decoded info into gd->arch */ |