Support the MIPS32 / MIPS64 DSP ASE.

[linux-2.6-block.git] / arch / mips / kernel / process.c

diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index 368526af5f5e1e43336ce450ff304ac4bb70a546..98432097a86ad1ef19ce24ae9516391fb82fd41c 100644 (file)
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -25,8 +25,10 @@
 #include <linux/init.h>
 #include <linux/completion.h>
 
+#include <asm/abi.h>
 #include <asm/bootinfo.h>
 #include <asm/cpu.h>
+#include <asm/dsp.h>
 #include <asm/fpu.h>
 #include <asm/pgtable.h>
 #include <asm/system.h>
@@ -54,6 +56,54 @@ ATTRIB_NORET void cpu_idle(void)
        }
 }
 
+extern int do_signal(sigset_t *oldset, struct pt_regs *regs);
+extern int do_signal32(sigset_t *oldset, struct pt_regs *regs);
+
+/*
+ * Native o32 and N64 ABI without DSP ASE
+ */
+extern void setup_frame(struct k_sigaction * ka, struct pt_regs *regs,
+        int signr, sigset_t *set);
+extern void setup_rt_frame(struct k_sigaction * ka, struct pt_regs *regs,
+        int signr, sigset_t *set, siginfo_t *info);
+
+struct mips_abi mips_abi = {
+       .do_signal      = do_signal,
+#ifdef CONFIG_TRAD_SIGNALS
+       .setup_frame    = setup_frame,
+#endif
+       .setup_rt_frame = setup_rt_frame
+};
+
+#ifdef CONFIG_MIPS32_O32
+/*
+ * o32 compatibility on 64-bit kernels, without DSP ASE
+ */
+extern void setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
+        int signr, sigset_t *set);
+extern void setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
+        int signr, sigset_t *set, siginfo_t *info);
+
+struct mips_abi mips_abi_32 = {
+       .do_signal      = do_signal32,
+       .setup_frame    = setup_frame_32,
+       .setup_rt_frame = setup_rt_frame_32
+};
+#endif /* CONFIG_MIPS32_O32 */
+
+#ifdef CONFIG_MIPS32_N32
+/*
+ * N32 on 64-bit kernels, without DSP ASE
+ */
+extern void setup_rt_frame_n32(struct k_sigaction * ka, struct pt_regs *regs,
+        int signr, sigset_t *set, siginfo_t *info);
+
+struct mips_abi mips_abi_n32 = {
+       .do_signal      = do_signal,
+       .setup_rt_frame = setup_rt_frame_n32
+};
+#endif /* CONFIG_MIPS32_N32 */
+
 asmlinkage void ret_from_fork(void);
 
 void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp)
@@ -70,6 +120,8 @@ void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp)
        regs->cp0_status = status;
        clear_used_math();
        lose_fpu();
+       if (cpu_has_dsp)
+               __init_dsp();
        regs->cp0_epc = pc;
        regs->regs[29] = sp;
        current_thread_info()->addr_limit = USER_DS;
@@ -95,9 +147,11 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
 
        preempt_disable();
 
-       if (is_fpu_owner()) {
+       if (is_fpu_owner())
                save_fp(p);
-       }
+
+       if (cpu_has_dsp)
+               save_dsp(p);
 
        preempt_enable();