diff options
| -rw-r--r-- | arch/x86/cpu/i386/cpu.c | 5 | ||||
| -rw-r--r-- | arch/x86/include/asm/u-boot-x86.h | 8 | ||||
| -rw-r--r-- | arch/x86/lib/fsp2/fsp_meminit.c | 1 |
3 files changed, 14 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 */ diff --git a/arch/x86/include/asm/u-boot-x86.h b/arch/x86/include/asm/u-boot-x86.h index 3e5d56d075..bd3f44014c 100644 --- a/arch/x86/include/asm/u-boot-x86.h +++ b/arch/x86/include/asm/u-boot-x86.h @@ -43,6 +43,14 @@ int x86_cpu_reinit_f(void); */ int x86_cpu_init_tpl(void); +/** + * cpu_reinit_fpu() - Reinit the FPU if something is wrong with it + * + * The FSP-M code can leave registers in use in the FPU. This functions reinits + * it so that the FPU can be used safely + */ +void cpu_reinit_fpu(void); + int cpu_init_f(void); void setup_gdt(struct global_data *id, u64 *gdt_addr); /* diff --git a/arch/x86/lib/fsp2/fsp_meminit.c b/arch/x86/lib/fsp2/fsp_meminit.c index 1a758147b0..faf9c29aef 100644 --- a/arch/x86/lib/fsp2/fsp_meminit.c +++ b/arch/x86/lib/fsp2/fsp_meminit.c @@ -85,6 +85,7 @@ int fsp_memory_init(bool s3wake, bool use_spi_flash) func = (fsp_memory_init_func)(hdr->img_base + hdr->fsp_mem_init); ret = func(&upd, &hob); bootstage_accum(BOOTSTAGE_ID_ACCUM_FSP_M); + cpu_reinit_fpu(); if (ret) return log_msg_ret("SDRAM init fail\n", ret); |