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MIPS: Add detection of DSP ASE Revision 2.

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[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>
This commit is contained in:
Steven J. Hill 2012-08-03 10:26:04 -05:00 committed by Ralf Baechle
parent f59a2d22a0
commit ee80f7c73d
5 changed files with 11 additions and 2 deletions
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4
arch/mips/include/asm/cpu-features.h
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@ -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

1
arch/mips/include/asm/cpu.h
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@ -332,6 +332,7 @@ enum cpu_type_enum {
#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 */

1
arch/mips/include/asm/mipsregs.h
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@ -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)

6
arch/mips/kernel/cpu-probe.c
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@ -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();

1
arch/mips/kernel/proc.c
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@ -70,6 +70,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
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",