aboutsummaryrefslogtreecommitdiff
path: root/arch/mips/kernel/process.c
diff options
context:
space:
mode:
authorRalf Baechle <ralf@linux-mips.org>2005-05-31 11:49:19 +0000
committerRalf Baechle <ralf@linux-mips.org>2005-10-29 19:31:17 +0100
commite50c0a8fa60da9ac0e0a70caa8a3a803815c1f2f (patch)
tree1928e8b0a4b7fb615e5a9f65dc934ba2e74cb9cd /arch/mips/kernel/process.c
parent10f650db1bcc193ea07d4f8c2f07315da38ea0c4 (diff)
Support the MIPS32 / MIPS64 DSP ASE.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/process.c')
-rw-r--r--arch/mips/kernel/process.c58
1 files changed, 56 insertions, 2 deletions
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index 368526af5f5..98432097a86 100644
--- 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();