Support the MIPS32 / MIPS64 DSP ASE.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index 49821ee18984..2441e32ce820 100644
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -30,6 +30,7 @@
 
 #include <asm/byteorder.h>
 #include <asm/cpu.h>
+#include <asm/dsp.h>
 #include <asm/fpu.h>
 #include <asm/mipsregs.h>
 #include <asm/pgtable.h>
@@ -176,6 +177,27 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
                         write_c0_status(flags);
                         break;
                 }
+                case DSP_BASE ... DSP_BASE + 5:
+                        if (!cpu_has_dsp) {
+                                tmp = 0;
+                                ret = -EIO;
+                                goto out_tsk;
+                        }
+                        if (child->thread.dsp.used_dsp) {
+                                dspreg_t *dregs = __get_dsp_regs(child);
+                                tmp = (unsigned long) (dregs[addr - DSP_BASE]);
+                        } else {
+                                tmp = -1;       /* DSP registers yet used  */
+                        }
+                        break;
+                case DSP_CONTROL:
+                        if (!cpu_has_dsp) {
+                                tmp = 0;
+                                ret = -EIO;
+                                goto out_tsk;
+                        }
+                        tmp = child->thread.dsp.dspcontrol;
+                        break;
                 default:
                         tmp = 0;
                         ret = -EIO;
@@ -248,6 +270,22 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
                         else
                                 child->thread.fpu.soft.fcr31 = data;
                         break;
+                case DSP_BASE ... DSP_BASE + 5:
+                        if (!cpu_has_dsp) {
+                                ret = -EIO;
+                                break;
+                        }
+
+                        dspreg_t *dregs = __get_dsp_regs(child);
+                        dregs[addr - DSP_BASE] = data;
+                        break;
+                case DSP_CONTROL:
+                        if (!cpu_has_dsp) {
+                                ret = -EIO;
+                                break;
+                        }
+                        child->thread.dsp.dspcontrol = data;
+                        break;
                 default:
                         /* The rest are not allowed. */
                         ret = -EIO;