linux/arch/sh/include/asm/system_32.h
Paul Mundt fbb82b0365 sh: machine_ops based reboot support.
This provides a machine_ops-based reboot interface loosely cloned from
x86, and converts the native sh32 and sh64 cases over to it.

Necessary both for tying in SMP support and also enabling platforms like
SDK7786 to add support for their microcontroller-based power managers.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-20 16:42:52 +09:00

277 lines
6.7 KiB
C

#ifndef __ASM_SH_SYSTEM_32_H
#define __ASM_SH_SYSTEM_32_H
#include <linux/types.h>
#include <asm/mmu.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+, a0\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+, 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" \
"movs.l y1, @-r2\n\t" \
"movs.l y0, @-r2\n\t" \
"movs.l x1, @-r2\n\t" \
"movs.l x0, @-r2\n\t" \
"movs.l m1, @-r2\n\t" \
"movs.l m0, @-r2\n\t" \
"movs.l a1g, @-r2\n\t" \
"movs.l a0g, @-r2\n\t" \
"movs.l a1, @-r2\n\t" \
"movs.l a0, @-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
#if defined(CONFIG_CPU_SH4A)
#define __icbi(addr) __asm__ __volatile__ ( "icbi @%0\n\t" : : "r" (addr))
#else
#define __icbi(addr) mb()
#endif
#define __ocbp(addr) __asm__ __volatile__ ( "ocbp @%0\n\t" : : "r" (addr))
#define __ocbi(addr) __asm__ __volatile__ ( "ocbi @%0\n\t" : : "r" (addr))
#define __ocbwb(addr) __asm__ __volatile__ ( "ocbwb @%0\n\t" : : "r" (addr))
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"); \
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 \
noinline __attribute__ ((__section__ (".uncached.text")))
/*
* Jump to uncached area.
* When handling TLB or caches, we need to do it from an uncached area.
*/
#define jump_to_uncached() \
do { \
unsigned long __dummy; \
\
__asm__ __volatile__( \
"mova 1f, %0\n\t" \
"add %1, %0\n\t" \
"jmp @%0\n\t" \
" nop\n\t" \
".balign 4\n" \
"1:" \
: "=&z" (__dummy) \
: "r" (cached_to_uncached)); \
} while (0)
/*
* Back to cached area.
*/
#define back_to_cached() \
do { \
unsigned long __dummy; \
ctrl_barrier(); \
__asm__ __volatile__( \
"mov.l 1f, %0\n\t" \
"jmp @%0\n\t" \
" nop\n\t" \
".balign 4\n" \
"1: .long 2f\n" \
"2:" \
: "=&r" (__dummy)); \
} while (0)
#ifdef CONFIG_CPU_HAS_SR_RB
#define lookup_exception_vector() \
({ \
unsigned long _vec; \
\
__asm__ __volatile__ ( \
"stc r2_bank, %0\n\t" \
: "=r" (_vec) \
); \
\
_vec; \
})
#else
#define lookup_exception_vector() \
({ \
unsigned long _vec; \
__asm__ __volatile__ ( \
"mov r4, %0\n\t" \
: "=r" (_vec) \
); \
\
_vec; \
})
#endif
static inline reg_size_t register_align(void *val)
{
return (unsigned long)(signed long)val;
}
int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,
struct mem_access *ma, int);
static inline void trigger_address_error(void)
{
if (__in_29bit_mode())
__asm__ __volatile__ (
"ldc %0, sr\n\t"
"mov.l @%1, %0"
:
: "r" (0x10000000), "r" (0x80000001)
);
}
asmlinkage void do_address_error(struct pt_regs *regs,
unsigned long writeaccess,
unsigned long address);
asmlinkage void do_divide_error(unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7,
struct pt_regs __regs);
asmlinkage void do_reserved_inst(unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7,
struct pt_regs __regs);
asmlinkage void do_illegal_slot_inst(unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7,
struct pt_regs __regs);
asmlinkage void do_exception_error(unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7,
struct pt_regs __regs);
static inline void set_bl_bit(void)
{
unsigned long __dummy0, __dummy1;
__asm__ __volatile__ (
"stc sr, %0\n\t"
"or %2, %0\n\t"
"and %3, %0\n\t"
"ldc %0, sr\n\t"
: "=&r" (__dummy0), "=r" (__dummy1)
: "r" (0x10000000), "r" (0xffffff0f)
: "memory"
);
}
static inline void clear_bl_bit(void)
{
unsigned long __dummy0, __dummy1;
__asm__ __volatile__ (
"stc sr, %0\n\t"
"and %2, %0\n\t"
"ldc %0, sr\n\t"
: "=&r" (__dummy0), "=r" (__dummy1)
: "1" (~0x10000000)
: "memory"
);
}
#endif /* __ASM_SH_SYSTEM_32_H */