7 files changed, 71 insertions, 30 deletions

diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 5e1b08b00a33..fac48ad27b34 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -435,6 +435,9 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
         }
 }
 
+static char unknown_isa[] __initdata = KERN_ERR \
+        "Unsupported ISA type, c0.config0: %d.";
+
 static inline unsigned int decode_config0(struct cpuinfo_mips *c)
 {
         unsigned int config0;
@@ -447,16 +450,37 @@ static inline unsigned int decode_config0(struct cpuinfo_mips *c)
         isa = (config0 & MIPS_CONF_AT) >> 13;
         switch (isa) {
         case 0:
-                c->isa_level = MIPS_CPU_ISA_M32;
+                switch ((config0 >> 10) & 7) {
+                case 0:
+                        c->isa_level = MIPS_CPU_ISA_M32R1;
+                        break;
+                case 1:
+                        c->isa_level = MIPS_CPU_ISA_M32R2;
+                        break;
+                default:
+                        goto unknown;
+                }
                 break;
         case 2:
-                c->isa_level = MIPS_CPU_ISA_M64;
+                switch ((config0 >> 10) & 7) {
+                case 0:
+                        c->isa_level = MIPS_CPU_ISA_M64R1;
+                        break;
+                case 1:
+                        c->isa_level = MIPS_CPU_ISA_M64R2;
+                        break;
+                default:
+                        goto unknown;
+                }
                 break;
         default:
-                panic("Unsupported ISA type, cp0.config0.at: %d.", isa);
+                goto unknown;
         }
 
         return config0 & MIPS_CONF_M;
+
+unknown:
+        panic(unknown_isa, config0);
 }
 
 static inline unsigned int decode_config1(struct cpuinfo_mips *c)
@@ -568,7 +592,6 @@ static inline void cpu_probe_mips(struct cpuinfo_mips *c)
                 break;
         case PRID_IMP_34K:
                 c->cputype = CPU_34K;
-                c->isa_level = MIPS_CPU_ISA_M32;
                 break;
         }
 }
@@ -647,7 +670,7 @@ static inline void cpu_probe_philips(struct cpuinfo_mips *c)
         switch (c->processor_id & 0xff00) {
         case PRID_IMP_PR4450:
                 c->cputype = CPU_PR4450;
-                c->isa_level = MIPS_CPU_ISA_M32;
+                c->isa_level = MIPS_CPU_ISA_M32R1;
                 break;
         default:
                 panic("Unknown Philips Core!"); /* REVISIT: die? */
@@ -690,8 +713,10 @@ __init void cpu_probe(void)
         if (c->options & MIPS_CPU_FPU) {
                 c->fpu_id = cpu_get_fpu_id();
 
-                if (c->isa_level == MIPS_CPU_ISA_M32 ||
-                    c->isa_level == MIPS_CPU_ISA_M64) {
+                if (c->isa_level == MIPS_CPU_ISA_M32R1 ||
+                    c->isa_level == MIPS_CPU_ISA_M32R2 ||
+                    c->isa_level == MIPS_CPU_ISA_M64R1 ||
+                    c->isa_level == MIPS_CPU_ISA_M64R2) {
                         if (c->fpu_id & MIPS_FPIR_3D)
                                 c->ases |= MIPS_ASE_MIPS3D;
                 }
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index dd725779d91f..0476a4dce14e 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -205,7 +205,7 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *r)
         return 1;
 }
 
-void dump_regs(elf_greg_t *gp, struct pt_regs *regs)
+void elf_dump_regs(elf_greg_t *gp, struct pt_regs *regs)
 {
         int i;
 
@@ -231,7 +231,7 @@ int dump_task_regs (struct task_struct *tsk, elf_gregset_t *regs)
 {
         struct thread_info *ti = tsk->thread_info;
         long ksp = (unsigned long)ti + THREAD_SIZE - 32;
-        dump_regs(&(*regs)[0], (struct pt_regs *) ksp - 1);
+        elf_dump_regs(&(*regs)[0], (struct pt_regs *) ksp - 1);
         return 1;
 }
 
diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index 510da5fda567..8d2549335304 100644
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -280,12 +280,8 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                                 ret = -EIO;
                                 goto out;
                         }
-                        if (child->thread.dsp.used_dsp) {
-                                dregs = __get_dsp_regs(child);
-                                tmp = (unsigned long) (dregs[addr - DSP_BASE]);
-                        } else {
-                                tmp = -1;       /* DSP registers yet used  */
-                        }
+                        dregs = __get_dsp_regs(child);
+                        tmp = (unsigned long) (dregs[addr - DSP_BASE]);
                         break;
                 }
                 case DSP_CONTROL:
diff --git a/arch/mips/kernel/ptrace32.c b/arch/mips/kernel/ptrace32.c
index 7e55457a491f..1f998bfde165 100644
--- a/arch/mips/kernel/ptrace32.c
+++ b/arch/mips/kernel/ptrace32.c
@@ -201,12 +201,8 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
                                 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  */
-                        }
+                        dspreg_t *dregs = __get_dsp_regs(child);
+                        tmp = (unsigned long) (dregs[addr - DSP_BASE]);
                         break;
                 case DSP_CONTROL:
                         if (!cpu_has_dsp) {
diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index c856dbc52abb..98b185bbc947 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -588,7 +588,7 @@ static inline int setup_sigcontext32(struct pt_regs *regs,
         err |= __put_user(regs->hi, &sc->sc_mdhi);
         err |= __put_user(regs->lo, &sc->sc_mdlo);
         if (cpu_has_dsp) {
-                err |= __put_user(rddsp(DSP_MASK), &sc->sc_hi1);
+                err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
                 err |= __put_user(mfhi1(), &sc->sc_hi1);
                 err |= __put_user(mflo1(), &sc->sc_lo1);
                 err |= __put_user(mfhi2(), &sc->sc_hi2);
diff --git a/arch/mips/kernel/time.c b/arch/mips/kernel/time.c
index 787ed541d442..7050b4ffffcd 100644
--- a/arch/mips/kernel/time.c
+++ b/arch/mips/kernel/time.c
@@ -507,14 +507,38 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
         return IRQ_HANDLED;
 }
 
+int null_perf_irq(struct pt_regs *regs)
+{
+        return 0;
+}
+
+int (*perf_irq)(struct pt_regs *regs) = null_perf_irq;
+
+EXPORT_SYMBOL(null_perf_irq);
+EXPORT_SYMBOL(perf_irq);
+
 asmlinkage void ll_timer_interrupt(int irq, struct pt_regs *regs)
 {
+        int r2 = cpu_has_mips_r2;
+
         irq_enter();
         kstat_this_cpu.irqs[irq]++;
 
+        /*
+         * Suckage alert:
+         * Before R2 of the architecture there was no way to see if a
+         * performance counter interrupt was pending, so we have to run the
+         * performance counter interrupt handler anyway.
+         */
+        if (!r2 || (read_c0_cause() & (1 << 26)))
+                if (perf_irq(regs))
+                        goto out;
+
         /* we keep interrupt disabled all the time */
-        timer_interrupt(irq, NULL, regs);
+        if (!r2 || (read_c0_cause() & (1 << 30)))
+                timer_interrupt(irq, NULL, regs);
 
+out:
         irq_exit();
 }
 
@@ -628,9 +652,9 @@ void __init time_init(void)
                         mips_hpt_init = c0_hpt_init;
                 }
 
-                if ((current_cpu_data.isa_level == MIPS_CPU_ISA_M32) ||
-                         (current_cpu_data.isa_level == MIPS_CPU_ISA_I) ||
-                         (current_cpu_data.isa_level == MIPS_CPU_ISA_II))
+                if (cpu_has_mips32r1 || cpu_has_mips32r2 ||
+                    (current_cpu_data.isa_level == MIPS_CPU_ISA_I) ||
+                    (current_cpu_data.isa_level == MIPS_CPU_ISA_II))
                         /*
                          * We need to calibrate the counter but we don't have
                          * 64-bit division.
diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c
index 9c89eebc356f..ae83b755cf4a 100644
--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -99,9 +99,9 @@ struct vpe {
 
         /* elfloader stuff */
         void *load_addr;
-        u32 len;
+        unsigned long len;
         char *pbuffer;
-        u32 plen;
+        unsigned long plen;
 
         unsigned long __start;
 
@@ -253,11 +253,11 @@ void dump_mtregs(void)
 }
 
 /* Find some VPE program space  */
-static void *alloc_progmem(u32 len)
+static void *alloc_progmem(unsigned long len)
 {
 #ifdef CONFIG_MIPS_VPE_LOADER_TOM
         /* this means you must tell linux to use less memory than you physically have */
-        return (void *)((max_pfn * PAGE_SIZE) + KSEG0);
+        return pfn_to_kaddr(max_pfn);
 #else
         // simple grab some mem for now
         return kmalloc(len, GFP_KERNEL);