diff options
| -rw-r--r-- | arch/sh/include/asm/processor_32.h | 13 | ||||
| -rw-r--r-- | arch/sh/include/asm/ptrace.h | 8 | ||||
| -rw-r--r-- | arch/sh/include/asm/system_32.h | 170 | ||||
| -rw-r--r-- | arch/sh/kernel/cpu/sh3/entry.S | 85 | ||||
| -rw-r--r-- | arch/sh/kernel/process_32.c | 14 | ||||
| -rw-r--r-- | arch/sh/kernel/ptrace_32.c | 6 | ||||
| -rw-r--r-- | arch/sh/kernel/traps_32.c | 2 |
7 files changed, 161 insertions, 137 deletions
diff --git a/arch/sh/include/asm/processor_32.h b/arch/sh/include/asm/processor_32.h index efdd78a53b1..9a8714945dc 100644 --- a/arch/sh/include/asm/processor_32.h +++ b/arch/sh/include/asm/processor_32.h @@ -58,6 +58,14 @@ asmlinkage void __init sh_cpu_init(void); #define SR_FD 0x00008000 /* + * DSP structure and data + */ +struct sh_dsp_struct { + unsigned long dsp_regs[14]; + long status; +}; + +/* * FPU structure and data */ @@ -96,6 +104,11 @@ struct thread_struct { /* floating point info */ union sh_fpu_union fpu; + +#ifdef CONFIG_SH_DSP + /* Dsp status information */ + struct sh_dsp_struct dsp_status; +#endif }; /* Count of active tasks with UBC settings */ diff --git a/arch/sh/include/asm/ptrace.h b/arch/sh/include/asm/ptrace.h index 81c6568fdb3..d3f6caa936b 100644 --- a/arch/sh/include/asm/ptrace.h +++ b/arch/sh/include/asm/ptrace.h @@ -119,16 +119,8 @@ struct task_struct; extern void user_enable_single_step(struct task_struct *); extern void user_disable_single_step(struct task_struct *); -#ifdef CONFIG_SH_DSP -#define task_pt_regs(task) \ - ((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE \ - - sizeof(struct pt_dspregs)) - 1) -#define task_pt_dspregs(task) \ - ((struct pt_dspregs *) (task_stack_page(task) + THREAD_SIZE) - 1) -#else #define task_pt_regs(task) \ ((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1) -#endif static inline unsigned long profile_pc(struct pt_regs *regs) { diff --git a/arch/sh/include/asm/system_32.h b/arch/sh/include/asm/system_32.h index a726d5d0727..240b31e1142 100644 --- a/arch/sh/include/asm/system_32.h +++ b/arch/sh/include/asm/system_32.h @@ -3,59 +3,135 @@ #include <linux/types.h> +#ifdef CONFIG_SH_DSP + +#define is_dsp_enabled(tsk) \ + (!!(tsk->thread.dsp_status.status & SR_DSP)) + +#define __restore_dsp(tsk) \ +do { \ + register u32 *__ts2 __asm__ ("r2") = \ + (u32 *)&tsk->thread.dsp_status; \ + __asm__ __volatile__ ( \ + ".balign 4\n\t" \ + "movs.l @r2+, a1\n\t" \ + "movs.l @r2+, a0g\n\t" \ + "movs.l @r2+, a1g\n\t" \ + "movs.l @r2+, m0\n\t" \ + "movs.l @r2+, m1\n\t" \ + "movs.l @r2+, a0\n\t" \ + "movs.l @r2+, x0\n\t" \ + "movs.l @r2+, x1\n\t" \ + "movs.l @r2+, y0\n\t" \ + "movs.l @r2+, y1\n\t" \ + "lds.l @r2+, dsr\n\t" \ + "ldc.l @r2+, rs\n\t" \ + "ldc.l @r2+, re\n\t" \ + "ldc.l @r2+, mod\n\t" \ + : : "r" (__ts2)); \ +} while (0) + + +#define __save_dsp(tsk) \ +do { \ + register u32 *__ts2 __asm__ ("r2") = \ + (u32 *)&tsk->thread.dsp_status + 14; \ + \ + __asm__ __volatile__ ( \ + ".balign 4\n\t" \ + "stc.l mod, @-r2\n\t" \ + "stc.l re, @-r2\n\t" \ + "stc.l rs, @-r2\n\t" \ + "sts.l dsr, @-r2\n\t" \ + "sts.l y1, @-r2\n\t" \ + "sts.l y0, @-r2\n\t" \ + "sts.l x1, @-r2\n\t" \ + "sts.l x0, @-r2\n\t" \ + "sts.l a0, @-r2\n\t" \ + ".word 0xf653 ! movs.l a1, @-r2\n\t" \ + ".word 0xf6f3 ! movs.l a0g, @-r2\n\t" \ + ".word 0xf6d3 ! movs.l a1g, @-r2\n\t" \ + ".word 0xf6c3 ! movs.l m0, @-r2\n\t" \ + ".word 0xf6e3 ! movs.l m1, @-r2\n\t" \ + : : "r" (__ts2)); \ +} while (0) + +#else + +#define is_dsp_enabled(tsk) (0) +#define __save_dsp(tsk) do { } while (0) +#define __restore_dsp(tsk) do { } while (0) +#endif + struct task_struct *__switch_to(struct task_struct *prev, struct task_struct *next); /* * switch_to() should switch tasks to task nr n, first */ -#define switch_to(prev, next, last) \ -do { \ - register u32 *__ts1 __asm__ ("r1") = (u32 *)&prev->thread.sp; \ - register u32 *__ts2 __asm__ ("r2") = (u32 *)&prev->thread.pc; \ - register u32 *__ts4 __asm__ ("r4") = (u32 *)prev; \ - register u32 *__ts5 __asm__ ("r5") = (u32 *)next; \ - register u32 *__ts6 __asm__ ("r6") = (u32 *)&next->thread.sp; \ - register u32 __ts7 __asm__ ("r7") = next->thread.pc; \ - struct task_struct *__last; \ - \ - __asm__ __volatile__ ( \ - ".balign 4\n\t" \ - "stc.l gbr, @-r15\n\t" \ - "sts.l pr, @-r15\n\t" \ - "mov.l r8, @-r15\n\t" \ - "mov.l r9, @-r15\n\t" \ - "mov.l r10, @-r15\n\t" \ - "mov.l r11, @-r15\n\t" \ - "mov.l r12, @-r15\n\t" \ - "mov.l r13, @-r15\n\t" \ - "mov.l r14, @-r15\n\t" \ - "mov.l r15, @r1\t! save SP\n\t" \ - "mov.l @r6, r15\t! change to new stack\n\t" \ - "mova 1f, %0\n\t" \ - "mov.l %0, @r2\t! save PC\n\t" \ - "mov.l 2f, %0\n\t" \ - "jmp @%0\t! call __switch_to\n\t" \ - " lds r7, pr\t! with return to new PC\n\t" \ - ".balign 4\n" \ - "2:\n\t" \ - ".long __switch_to\n" \ - "1:\n\t" \ - "mov.l @r15+, r14\n\t" \ - "mov.l @r15+, r13\n\t" \ - "mov.l @r15+, r12\n\t" \ - "mov.l @r15+, r11\n\t" \ - "mov.l @r15+, r10\n\t" \ - "mov.l @r15+, r9\n\t" \ - "mov.l @r15+, r8\n\t" \ - "lds.l @r15+, pr\n\t" \ - "ldc.l @r15+, gbr\n\t" \ - : "=z" (__last) \ - : "r" (__ts1), "r" (__ts2), "r" (__ts4), \ - "r" (__ts5), "r" (__ts6), "r" (__ts7) \ - : "r3", "t"); \ - \ - last = __last; \ +#define switch_to(prev, next, last) \ +do { \ + register u32 *__ts1 __asm__ ("r1"); \ + register u32 *__ts2 __asm__ ("r2"); \ + register u32 *__ts4 __asm__ ("r4"); \ + register u32 *__ts5 __asm__ ("r5"); \ + register u32 *__ts6 __asm__ ("r6"); \ + register u32 __ts7 __asm__ ("r7"); \ + struct task_struct *__last; \ + \ + if (is_dsp_enabled(prev)) \ + __save_dsp(prev); \ + \ + __ts1 = (u32 *)&prev->thread.sp; \ + __ts2 = (u32 *)&prev->thread.pc; \ + __ts4 = (u32 *)prev; \ + __ts5 = (u32 *)next; \ + __ts6 = (u32 *)&next->thread.sp; \ + __ts7 = next->thread.pc; \ + \ + __asm__ __volatile__ ( \ + ".balign 4\n\t" \ + "stc.l gbr, @-r15\n\t" \ + "sts.l pr, @-r15\n\t" \ + "mov.l r8, @-r15\n\t" \ + "mov.l r9, @-r15\n\t" \ + "mov.l r10, @-r15\n\t" \ + "mov.l r11, @-r15\n\t" \ + "mov.l r12, @-r15\n\t" \ + "mov.l r13, @-r15\n\t" \ + "mov.l r14, @-r15\n\t" \ + "mov.l r15, @r1\t! save SP\n\t" \ + "mov.l @r6, r15\t! change to new stack\n\t" \ + "mova 1f, %0\n\t" \ + "mov.l %0, @r2\t! save PC\n\t" \ + "mov.l 2f, %0\n\t" \ + "jmp @%0\t! call __switch_to\n\t" \ + " lds r7, pr\t! with return to new PC\n\t" \ + ".balign 4\n" \ + "2:\n\t" \ + ".long __switch_to\n" \ + "1:\n\t" \ + "mov.l @r15+, r14\n\t" \ + "mov.l @r15+, r13\n\t" \ + "mov.l @r15+, r12\n\t" \ + "mov.l @r15+, r11\n\t" \ + "mov.l @r15+, r10\n\t" \ + "mov.l @r15+, r9\n\t" \ + "mov.l @r15+, r8\n\t" \ + "lds.l @r15+, pr\n\t" \ + "ldc.l @r15+, gbr\n\t" \ + : "=z" (__last) \ + : "r" (__ts1), "r" (__ts2), "r" (__ts4), \ + "r" (__ts5), "r" (__ts6), "r" (__ts7) \ + : "r3", "t"); \ + \ + last = __last; \ +} while (0) + +#define finish_arch_switch(prev) \ +do { \ + if (is_dsp_enabled(prev)) \ + __restore_dsp(prev); \ } while (0) #define __uses_jump_to_uncached \ diff --git a/arch/sh/kernel/cpu/sh3/entry.S b/arch/sh/kernel/cpu/sh3/entry.S index 55da0ff9848..3cb531f233f 100644 --- a/arch/sh/kernel/cpu/sh3/entry.S +++ b/arch/sh/kernel/cpu/sh3/entry.S @@ -254,40 +254,6 @@ restore_all: lds k2, pr ! restore pr ! -#ifdef CONFIG_SH_DSP - mov.l @r15+, k0 ! DSP mode marker - mov.l 5f, k1 - cmp/eq k0, k1 ! Do we have a DSP stack frame? - bf skip_restore - - stc sr, k0 ! Enable CPU DSP mode - or k1, k0 ! (within kernel it may be disabled) - ldc k0, sr - mov r2, k0 ! Backup r2 - - ! Restore DSP registers from stack - mov r15, r2 - movs.l @r2+, a1 - movs.l @r2+, a0g - movs.l @r2+, a1g - movs.l @r2+, m0 - movs.l @r2+, m1 - mov r2, r15 - - lds.l @r15+, a0 - lds.l @r15+, x0 - lds.l @r15+, x1 - lds.l @r15+, y0 - lds.l @r15+, y1 - lds.l @r15+, dsr - ldc.l @r15+, rs - ldc.l @r15+, re - ldc.l @r15+, mod - - mov k0, r2 ! Restore r2 -skip_restore: -#endif - ! ! Calculate new SR value mov k3, k2 ! original SR value mov #0xf0, k1 @@ -358,7 +324,7 @@ general_exception: add k0, k4 0: ! Setup stack and save DSP context (k0 contains original r15 on return) - bsr prepare_stack_save_dsp + bsr prepare_stack nop ! Save registers / Switch to bank 0 @@ -374,15 +340,14 @@ general_exception: 1: .long EXPEVT #endif -! prepare_stack_save_dsp() +! prepare_stack() ! - roll back gRB ! - switch to kernel stack -! - save DSP ! k0 returns original sp (after roll back) ! k1 trashed ! k2 trashed -prepare_stack_save_dsp: +prepare_stack: #ifdef CONFIG_GUSA ! Check for roll back gRB (User and Kernel) mov r15, k0 @@ -416,47 +381,9 @@ prepare_stack_save_dsp: mov k1, r15 ! change to kernel stack ! 1: -#ifdef CONFIG_SH_DSP - ! Save DSP context if needed - stc sr, k1 - mov #0x10, k2 - shll8 k2 ! DSP=1 (0x00001000) - tst k2, k1 ! Check if in DSP mode (passed in k2) - bt/s skip_save - mov #0, k1 ! Set marker for no stack frame - - mov k2, k1 ! Save has-frame marker - - ! Save DSP registers on stack - stc.l mod, @-r15 - stc.l re, @-r15 - stc.l rs, @-r15 - sts.l dsr, @-r15 - sts.l y1, @-r15 - sts.l y0, @-r15 - sts.l x1, @-r15 - sts.l x0, @-r15 - sts.l a0, @-r15 - - ! GAS is broken, does not generate correct "movs.l Ds,@-As" instr. - - ! FIXME: Make sure that this is still the case with newer toolchains, - ! as we're not at all interested in supporting ancient toolchains at - ! this point. -- PFM. - - mov r15, k2 - .word 0xf653 ! movs.l a1, @-r2 - .word 0xf6f3 ! movs.l a0g, @-r2 - .word 0xf6d3 ! movs.l a1g, @-r2 - .word 0xf6c3 ! movs.l m0, @-r2 - .word 0xf6e3 ! movs.l m1, @-r2 - mov k2, r15 - -skip_save: - mov.l k1, @-r15 ! Push DSP mode marker onto stack -#endif rts nop + ! ! 0x400: Instruction and Data TLB miss exception vector ! @@ -468,7 +395,7 @@ handle_exception: mova exception_data, k0 ! Setup stack and save DSP context (k0 contains original r15 on return) - bsr prepare_stack_save_dsp + bsr prepare_stack PREF(k0) ! Save registers / Switch to bank 0 @@ -572,7 +499,7 @@ ENTRY(handle_interrupt) mova exception_data, k0 ! Setup stack and save DSP context (k0 contains original r15 on return) - bsr prepare_stack_save_dsp + bsr prepare_stack PREF(k0) ! Save registers / Switch to bank 0 diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c index ddafbbbab2a..0747fabd73a 100644 --- a/arch/sh/kernel/process_32.c +++ b/arch/sh/kernel/process_32.c @@ -176,14 +176,26 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long usp, { struct thread_info *ti = task_thread_info(p); struct pt_regs *childregs; -#if defined(CONFIG_SH_FPU) +#if defined(CONFIG_SH_FPU) || defined(CONFIG_SH_DSP) struct task_struct *tsk = current; +#endif +#if defined(CONFIG_SH_FPU) unlazy_fpu(tsk, regs); p->thread.fpu = tsk->thread.fpu; copy_to_stopped_child_used_math(p); #endif +#if defined(CONFIG_SH_DSP) + if (is_dsp_enabled(tsk)) { + /* We can use the __save_dsp or just copy the struct: + * __save_dsp(p); + * p->thread.dsp_status.status |= SR_DSP + */ + p->thread.dsp_status = tsk->thread.dsp_status; + } +#endif + childregs = task_pt_regs(p); *childregs = *regs; diff --git a/arch/sh/kernel/ptrace_32.c b/arch/sh/kernel/ptrace_32.c index 29ca09d24ef..f7b22dd83b0 100644 --- a/arch/sh/kernel/ptrace_32.c +++ b/arch/sh/kernel/ptrace_32.c @@ -200,7 +200,8 @@ static int dspregs_get(struct task_struct *target, unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf) { - const struct pt_dspregs *regs = task_pt_dspregs(target); + const struct pt_dspregs *regs = + (struct pt_dspregs *)&target->thread.dsp_status.dsp_regs; int ret; ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, regs, @@ -217,7 +218,8 @@ static int dspregs_set(struct task_struct *target, unsigned int pos, unsigned int count, const void *kbuf, const void __user *ubuf) { - struct pt_dspregs *regs = task_pt_dspregs(target); + struct pt_dspregs *regs = + (struct pt_dspregs *)&target->thread.dsp_status.dsp_regs; int ret; ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, regs, diff --git a/arch/sh/kernel/traps_32.c b/arch/sh/kernel/traps_32.c index 60dcf87ed01..30ca9c51e52 100644 --- a/arch/sh/kernel/traps_32.c +++ b/arch/sh/kernel/traps_32.c @@ -664,6 +664,8 @@ asmlinkage void do_reserved_inst(unsigned long r4, unsigned long r5, if (is_dsp_inst(regs)) { /* Enable DSP mode, and restart instruction. */ regs->sr |= SR_DSP; + /* Save DSP mode */ + tsk->thread.dsp_status.status |= SR_DSP; return; } #endif |