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MIPS: Detect DSP v3 support 

DSPv3 is supported on all MIPSr6 systems which indicate support for DSPv2.

This doesn't require any changes to the kernel's handling of DSP
resources. The patch is to detect support and indicate it in /proc/cpuinfo

DSP v3 introduces a new instruction BPOSGE32C

Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
Reviewed-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12918/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
hifive-unleashed-5.1
Zubair Lutfullah Kakakhel 2016-03-29 15:50:25 +01:00 committed by Ralf Baechle
parent 157b939470
commit b5a6455cde
4 changed files with 10 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/mips/include/asm/cpu-features.h
View File

@ -307,6 +307,10 @@
#define cpu_has_dsp2 (cpu_data[0].ases & MIPS_ASE_DSP2P)
#endif
#ifndef cpu_has_dsp3
#define cpu_has_dsp3 (cpu_data[0].ases & MIPS_ASE_DSP3)
#endif
#ifndef cpu_has_mipsmt
#define cpu_has_mipsmt (cpu_data[0].ases & MIPS_ASE_MIPSMT)
#endif

1
arch/mips/include/asm/cpu.h
View File

@ -413,5 +413,6 @@ enum cpu_type_enum {
#define MIPS_ASE_DSP2P 0x00000040 /* Signal Processing ASE Rev 2 */
#define MIPS_ASE_VZ 0x00000080 /* Virtualization ASE */
#define MIPS_ASE_MSA 0x00000100 /* MIPS SIMD Architecture */
#define MIPS_ASE_DSP3 0x00000200 /* Signal Processing ASE Rev 3*/
#endif /* _ASM_CPU_H */

5
arch/mips/kernel/cpu-probe.c
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@ -680,8 +680,11 @@ static inline unsigned int decode_config3(struct cpuinfo_mips *c)
c->options |= MIPS_CPU_RIXI;
if (config3 & MIPS_CONF3_DSP)
c->ases |= MIPS_ASE_DSP;
if (config3 & MIPS_CONF3_DSP2P)
if (config3 & MIPS_CONF3_DSP2P) {
c->ases |= MIPS_ASE_DSP2P;
if (cpu_has_mips_r6)
c->ases |= MIPS_ASE_DSP3;
}
if (config3 & MIPS_CONF3_VINT)
c->options |= MIPS_CPU_VINT;
if (config3 & MIPS_CONF3_VEIC)

1
arch/mips/kernel/proc.c
View File

@ -114,6 +114,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
if (cpu_has_smartmips) seq_printf(m, "%s", " smartmips");
if (cpu_has_dsp) seq_printf(m, "%s", " dsp");
if (cpu_has_dsp2) seq_printf(m, "%s", " dsp2");
if (cpu_has_dsp3) seq_printf(m, "%s", " dsp3");
if (cpu_has_mipsmt) seq_printf(m, "%s", " mt");
if (cpu_has_mmips) seq_printf(m, "%s", " micromips");
if (cpu_has_vz) seq_printf(m, "%s", " vz");