diff options
Diffstat (limited to 'arch/nds32/cpu/n1213/ag102/lowlevel_init.S')
| -rw-r--r-- | arch/nds32/cpu/n1213/ag102/lowlevel_init.S | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/nds32/cpu/n1213/ag102/lowlevel_init.S b/arch/nds32/cpu/n1213/ag102/lowlevel_init.S index 94018483f2..238410dde4 100644 --- a/arch/nds32/cpu/n1213/ag102/lowlevel_init.S +++ b/arch/nds32/cpu/n1213/ag102/lowlevel_init.S @@ -98,6 +98,11 @@ lowlevel_init: led 0x20 jal remap +#if (defined(NDS32_EXT_FPU_DP) || defined(NDS32_EXT_FPU_SP)) + led 0x2f + jal enable_fpu +#endif + led 0x30 ret $r10 @@ -273,6 +278,27 @@ relo_base: 2: ret + /* + * enable_fpu: + * Some of Andes CPU version support FPU coprocessor, if so, + * and toolchain support FPU instruction set, we should enable it. + */ +#if (defined(NDS32_EXT_FPU_DP) || defined(NDS32_EXT_FPU_SP)) +enable_fpu: + mfsr $r0, $CPU_VER /* enable FPU if it exists */ + srli $r0, $r0, 3 + andi $r0, $r0, 1 + beqz $r0, 1f /* skip if no COP */ + mfsr $r0, $FUCOP_EXIST + srli $r0, $r0, 31 + beqz $r0, 1f /* skip if no FPU */ + mfsr $r0, $FUCOP_CTL + ori $r0, $r0, 1 + mtsr $r0, $FUCOP_CTL +1: + ret +#endif + .globl show_led show_led: li $r8, (CONFIG_DEBUG_LED) |