MIPS: Add detection of DSP ASE Revision 2.

[ralf@linux-mips.org: This patch really only detects the ASE and passes its
existence on to userland via /proc/cpuinfo.  The DSP ASE Rev 2. adds new
resources but no resources that would need management by the kernel.]

Signed-off-by: Steven J. Hill <sjhill@mips.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/4165/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index bd2809698e39..b1fb7af3c350 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -142,7 +142,7 @@ int __cpuinitdata mips_dsp_disabled;
 
 static int __init dsp_disable(char *s)
 {
-        cpu_data[0].ases &= ~MIPS_ASE_DSP;
+        cpu_data[0].ases &= ~(MIPS_ASE_DSP | MIPS_ASE_DSP2P);
         mips_dsp_disabled = 1;
 
         return 1;
@@ -429,6 +429,8 @@ 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)
+                c->ases |= MIPS_ASE_DSP2P;
         if (config3 & MIPS_CONF3_VINT)
                 c->options |= MIPS_CPU_VINT;
         if (config3 & MIPS_CONF3_VEIC)
@@ -1180,7 +1182,7 @@ __cpuinit void cpu_probe(void)
                 c->options &= ~MIPS_CPU_FPU;
 
         if (mips_dsp_disabled)
-                c->ases &= ~MIPS_ASE_DSP;
+                c->ases &= ~(MIPS_ASE_DSP | MIPS_ASE_DSP2P);
 
         if (c->options & MIPS_CPU_FPU) {
                 c->fpu_id = cpu_get_fpu_id();