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[PATCH v2,4/9] MIPS: Add microMIPS breakpoints and DSP support.

To: linux-mips@linux-mips.org, ralf@linux-mips.org
Subject: [PATCH v2,4/9] MIPS: Add microMIPS breakpoints and DSP support.
From: "Steven J. Hill" <sjhill@mips.com>
Date: Tue, 22 May 2012 23:57:16 -0500
Cc: "Steven J. Hill" <sjhill@mips.com>
Sender: linux-mips-bounce@linux-mips.org
From: "Steven J. Hill" <sjhill@mips.com>

Signed-off-by: Steven J. Hill <sjhill@mips.com>
---
 arch/mips/include/asm/break.h |   11 +++++++++--
 arch/mips/include/asm/dsp.h   |    4 ++++
 arch/mips/kernel/proc.c       |    9 +++++++--
 3 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/arch/mips/include/asm/break.h b/arch/mips/include/asm/break.h
index 9161e68..4e4dc87 100644
--- a/arch/mips/include/asm/break.h
+++ b/arch/mips/include/asm/break.h
@@ -3,8 +3,9 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 1995, 2003 by Ralf Baechle
  * Copyright (C) 1999 Silicon Graphics, Inc.
+ * Copyright (C) 1995, 2003 by Ralf Baechle
+ * Copyright (C) 2011, 2012 MIPS Technologies, Inc.
  */
 #ifndef __ASM_BREAK_H
 #define __ASM_BREAK_H
@@ -27,11 +28,17 @@
 #define BRK_STACKOVERFLOW 9    /* For Ada stackchecking */
 #define BRK_NORLD      10      /* No rld found - not used by Linux/MIPS */
 #define _BRK_THREADBP  11      /* For threads, user bp (used by debuggers) */
+
+#ifdef CONFIG_CPU_MICROMIPS
+#define BRK_BUG                12      /* Used by BUG() */
+#define BRK_KDB                13      /* Used in KDB_ENTER() */
+#else
 #define BRK_BUG                512     /* Used by BUG() */
 #define BRK_KDB                513     /* Used in KDB_ENTER() */
+#endif
+#define MM_BRK_MEMU    14      /* Used by FPU emulator (microMIPS) */
 #define BRK_MEMU       514     /* Used by FPU emulator */
 #define BRK_KPROBE_BP  515     /* Kprobe break */
 #define BRK_KPROBE_SSTEPBP 516 /* Kprobe single step software implementation */
-#define BRK_MULOVF     1023    /* Multiply overflow */
 
 #endif /* __ASM_BREAK_H */
diff --git a/arch/mips/include/asm/dsp.h b/arch/mips/include/asm/dsp.h
index e9bfc08..3149b30 100644
--- a/arch/mips/include/asm/dsp.h
+++ b/arch/mips/include/asm/dsp.h
@@ -16,7 +16,11 @@
 #include <asm/mipsregs.h>
 
 #define DSP_DEFAULT    0x00000000
+#ifdef CONFIG_CPU_MICROMIPS
+#define DSP_MASK       0x7f
+#else
 #define DSP_MASK       0x3ff
+#endif
 
 #define __enable_dsp_hazard()                                          \
 do {                                                                   \
diff --git a/arch/mips/kernel/proc.c b/arch/mips/kernel/proc.c
index 5542817..c5e97d4 100644
--- a/arch/mips/kernel/proc.c
+++ b/arch/mips/kernel/proc.c
@@ -64,14 +64,19 @@ static int show_cpuinfo(struct seq_file *m, void *v)
                                cpu_data[n].watch_reg_masks[i]);
                seq_printf(m, "]\n");
        }
-       seq_printf(m, "ASEs implemented\t:%s%s%s%s%s%s\n",
+       seq_printf(m, "ASEs implemented\t:%s%s%s%s%s%s%s\n",
                      cpu_has_mips16 ? " mips16" : "",
                      cpu_has_mdmx ? " mdmx" : "",
                      cpu_has_mips3d ? " mips3d" : "",
                      cpu_has_smartmips ? " smartmips" : "",
                      cpu_has_dsp ? " dsp" : "",
-                     cpu_has_mipsmt ? " mt" : ""
+                     cpu_has_mipsmt ? " mt" : "",
+                     cpu_has_mmips ? " micromips" : ""
                );
+       if (cpu_has_mmips) {
+               seq_printf(m, "micromips kernel\t: %s\n",
+                       (read_c0_config3() & MIPS_CONF3_ISA_OE) ? "yes" : "no");
+       }
        seq_printf(m, "shadow register sets\t: %d\n",
                      cpu_data[n].srsets);
        seq_printf(m, "kscratch registers\t: %d\n",
-- 
1.7.10


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