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>
diff --git a/arch/mips/include/asm/cpu-features.h b/arch/mips/include/asm/cpu-features.h
index 089125a..c507b93 100644
--- a/arch/mips/include/asm/cpu-features.h
+++ b/arch/mips/include/asm/cpu-features.h
@@ -171,6 +171,10 @@
#define cpu_has_dsp (cpu_data[0].ases & MIPS_ASE_DSP)
#endif
+#ifndef cpu_has_dsp2
+#define cpu_has_dsp2 (cpu_data[0].ases & MIPS_ASE_DSP2P)
+#endif
+
#ifndef cpu_has_mipsmt
#define cpu_has_mipsmt (cpu_data[0].ases & MIPS_ASE_MIPSMT)
#endif
diff --git a/arch/mips/include/asm/cpu.h b/arch/mips/include/asm/cpu.h
index 7dc0db8..52c4e91 100644
--- a/arch/mips/include/asm/cpu.h
+++ b/arch/mips/include/asm/cpu.h
@@ -332,6 +332,7 @@
#define MIPS_ASE_SMARTMIPS 0x00000008 /* SmartMIPS */
#define MIPS_ASE_DSP 0x00000010 /* Signal Processing ASE */
#define MIPS_ASE_MIPSMT 0x00000020 /* CPU supports MIPS MT */
+#define MIPS_ASE_DSP2P 0x00000040 /* Signal Processing ASE Rev 2 */
#endif /* _ASM_CPU_H */
diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h
index 04d7560..eb74289 100644
--- a/arch/mips/include/asm/mipsregs.h
+++ b/arch/mips/include/asm/mipsregs.h
@@ -592,6 +592,7 @@
#define MIPS_CONF3_VEIC (_ULCAST_(1) << 6)
#define MIPS_CONF3_LPA (_ULCAST_(1) << 7)
#define MIPS_CONF3_DSP (_ULCAST_(1) << 10)
+#define MIPS_CONF3_DSP2P (_ULCAST_(1) << 11)
#define MIPS_CONF3_RXI (_ULCAST_(1) << 12)
#define MIPS_CONF3_ULRI (_ULCAST_(1) << 13)
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index bd28096..b1fb7af 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -142,7 +142,7 @@
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 @@
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 @@
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();
diff --git a/arch/mips/kernel/proc.c b/arch/mips/kernel/proc.c
index 5542817..35cf209 100644
--- a/arch/mips/kernel/proc.c
+++ b/arch/mips/kernel/proc.c
@@ -70,6 +70,7 @@
cpu_has_mips3d ? " mips3d" : "",
cpu_has_smartmips ? " smartmips" : "",
cpu_has_dsp ? " dsp" : "",
+ cpu_has_dsp2 ? " dsp2" : "",
cpu_has_mipsmt ? " mt" : ""
);
seq_printf(m, "shadow register sets\t: %d\n",