/*
* defines common to all virtual CPUs
*
* Copyright (c) 2003 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef CPU_ALL_H
#define CPU_ALL_H
#if defined(__arm__) || defined(__sparc__)
#define WORDS_ALIGNED
#endif
/* some important defines:
*
* WORDS_ALIGNED : if defined, the host cpu can only make word aligned
* memory accesses.
*
* WORDS_BIGENDIAN : if defined, the host cpu is big endian and
* otherwise little endian.
*
* (TARGET_WORDS_ALIGNED : same for target cpu (not supported yet))
*
* TARGET_WORDS_BIGENDIAN : same for target cpu
*/
#include "bswap.h"
#if defined(WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
#define BSWAP_NEEDED
#endif
#ifdef BSWAP_NEEDED
static inline uint16_t tswap16(uint16_t s)
{
return bswap16(s);
}
static inline uint32_t tswap32(uint32_t s)
{
return bswap32(s);
}
static inline uint64_t tswap64(uint64_t s)
{
return bswap64(s);
}
static inline void tswap16s(uint16_t *s)
{
*s = bswap16(*s);
}
static inline void tswap32s(uint32_t *s)
{
*s = bswap32(*s);
}
static inline void tswap64s(uint64_t *s)
{
*s = bswap64(*s);
}
#else
static inline uint16_t tswap16(uint16_t s)
{
return s;
}
static inline uint32_t tswap32(uint32_t s)
{
return s;
}
static inline uint64_t tswap64(uint64_t s)
{
return s;
}
static inline void tswap16s(uint16_t *s)
{
}
static inline void tswap32s(uint32_t *s)
{
}
static inline void tswap64s(uint64_t *s)
{
}
#endif
#if TARGET_LONG_SIZE == 4
#define tswapl(s) tswap32(s)
#define tswapls(s) tswap32s((uint32_t *)(s))
#define bswaptls(s) bswap32s(s)
#else
#define tswapl(s) tswap64(s)
#define tswapls(s) tswap64s((uint64_t *)(s))
#define bswaptls(s) bswap64s(s)
#endif
/* NOTE: arm FPA is horrible as double 32 bit words are stored in big
endian ! */
typedef union {
float64 d;
#if defined(WORDS_BIGENDIAN) \
|| (defined(__arm__) && !defined(__VFP_FP__) && !defined(CONFIG_SOFTFLOAT))
struct {
uint32_t upper;
uint32_t lower;
} l;
#else
struct {
uint32_t lower;
uint32_t upper;
} l;
#endif
uint64_t ll;
} CPU_DoubleU;
/* CPU memory access without any memory or io remapping */
/*
* the generic syntax for the memory accesses is:
*
* load: ld{type}{sign}{size}{endian}_{access_type}(ptr)
*
* store: st{type}{size}{endian}_{access_type}(ptr, val)
*
* type is:
* (empty): integer access
* f : float access
*
* sign is:
* (empty): for floats or 32 bit size
* u : unsigned
* s : signed
*
* size is:
* b: 8 bits
* w: 16 bits
* l: 32 bits
* q: 64 bits
*
* endian is:
* (empty): target cpu endianness or 8 bit access
* r : reversed target cpu endianness (not implemented yet)
* be : big endian (not implemented yet)
* le : little endian (not implemented yet)
*
* access_type is:
* raw : host memory access
* user : user mode access using soft MMU
* kernel : kernel mode access using soft MMU
*/
static inline int ldub_p(void *ptr)
{
return *(uint8_t *)ptr;
}
static inline int ldsb_p(void *ptr)
{
return *(int8_t *)ptr;
}
static inline void stb_p(void *ptr, int v)
{
*(uint8_t *)ptr = v;
}
/* NOTE: on arm, putting 2 in /proc/sys/debug/alignment so that the
kernel handles unaligned load/stores may give better results, but
it is a system wide setting : bad */
#if defined(WORDS_BIGENDIAN) || defined(WORDS_ALIGNED)
/* conservative code for little endian unaligned accesses */
static inline int lduw_le_p(void *ptr)
{
#ifdef __powerpc__
int val;
__asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (ptr));
return val;
#else
uint8_t *p = ptr;
return p[0] | (p[1] << 8);
#endif
}
static inline int ldsw_le_p(void *ptr)
{
#ifdef __powerpc__
int val;
__asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (ptr));
return (int16_t)val;
#else
uint8_t *p = ptr;
return (int16_t)(p[0] | (p[1] << 8));
#endif
}
static inline int ldl_le_p(void *ptr)
{
#ifdef __powerpc__
int val;
__asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (ptr));
return val;
#else
uint8_t *p = ptr;
return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
#endif
}
static inline uint64_t ldq_le_p(void *ptr)
{
uint8_t *p = ptr;
uint32_t v1, v2;
v1 = ldl_le_p(p);
v2 = ldl_le_p(p + 4);
return v1 | ((uint64_t)v2 << 32);
}
static inline void stw_le_p(void *ptr, int v)
{
#ifdef __powerpc__
__asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*(uint16_t *)ptr) : "r" (v), "r" (ptr));
#else
uint8_t *p = ptr;
p[0] = v;
p[1] = v >> 8;
#endif
}
static inline void stl_le_p(void *ptr, int v)
{
#ifdef __powerpc__
__asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*(uint32_t *)ptr) : "r" (v), "r" (ptr));
#else
uint8_t *p = ptr;
p[0] = v;
p[1] = v >> 8;
p[2] = v >> 16;
p[3] = v >> 24;
#endif
}
static inline void stq_le_p(void *ptr, uint64_t v)
{
uint8_t *p = ptr;
stl_le_p(p, (uint32_t)v);
stl_le_p(p + 4, v >> 32);
}
/* float access */
static inline float32 ldfl_le_p(void *ptr)
{
union {
float32 f;
uint32_t i;
} u;
u.i = ldl_le_p(ptr);
return u.f;
}
static inline void stfl_le_p(void *ptr, float32 v)
{
union {
float32 f;
uint32_t i;
} u;
u.f = v;
stl_le_p(ptr, u.i);
}
static inline float64 ldfq_le_p(void *ptr)
{
CPU_DoubleU u;
u.l.lower = ldl_le_p(ptr);
u.l.upper = ldl_le_p(ptr + 4);
return u.d;
}
static inline void stfq_le_p(void *ptr, float64 v)
{
CPU_DoubleU u;
u.d = v;
stl_le_p(ptr, u.l.lower);
stl_le_p(ptr + 4, u.l.upper);
}
#else
static inline int lduw_le_p(void *ptr)
{
return *(uint16_t *)ptr;
}
static inline int ldsw_le_p(void *ptr)
{
return *(int16_t *)ptr;
}
static inline int ldl_le_p(void *ptr)
{
return *(uint32_t *)ptr;
}
static inline uint64_t ldq_le_p(void *ptr)
{
return *(uint64_t *)ptr;
}
static inline void stw_le_p(void *ptr, int v)
{
*(uint16_t *)ptr = v;
}
static inline void stl_le_p(void *ptr, int v)
{
*(uint32_t *)ptr = v;
}
static inline void stq_le_p(void *ptr, uint64_t v)
{
*(uint64_t *)ptr = v;
}
/* float access */
static inline float32 ldfl_le_p(void *ptr)
{
return *(float32 *)ptr;
}
static inline float64 ldfq_le_p(void *ptr)
{
return *(float64 *)ptr;
}
static inline void stfl_le_p(void *ptr, float32 v)
{
*(float32 *)ptr = v;
}
static inline void stfq_le_p(void *ptr, float64 v)
{
*(float64 *)ptr = v;
}
#endif
#if !defined(WORDS_BIGENDIAN) || defined(WORDS_ALIGNED)
static inline int lduw_be_p(void *ptr)
{
#if defined(__i386__)
int val;
asm volatile ("movzwl %1, %0\n"
"xchgb %b0, %h0\n"
: "=q" (val)
: "m" (*(uint16_t *)ptr));
return val;
#else
uint8_t *b = (uint8_t *) ptr;
return ((b[0] << 8) | b[1]);
#endif
}
static inline int ldsw_be_p(void *ptr)
{
#if defined(__i386__)
int val;
asm volatile ("movzwl %1, %0\n"
"xchgb %b0, %h0\n"
: "=q" (val)
: "m" (*(uint16_t *)ptr));
return (int16_t)val;
#else
uint8_t *b = (uint8_t *) ptr;
return (int16_t)((b[0] << 8) | b[1]);
#endif
}
static inline int ldl_be_p(void *ptr)
{
#if defined(__i386__) || defined(__x86_64__)
int val;
asm volatile ("movl %1, %0\n"
"bswap %0\n"
: "=r" (val)
: "m" (*(uint32_t *)ptr));
return val;
#else
uint8_t *b = (uint8_t *) ptr;
return (b[0] << 24) | (b[1] << 16) | (b[2] << 8) | b[3];
#endif
}
static inline uint64_t ldq_be_p(void *ptr)
{
uint32_t a,b;
a = ldl_be_p(ptr);
b = ldl_be_p(ptr+4);
return (((uint64_t)a<<32)|b);
}
static inline void stw_be_p(void *ptr, int v)
{
#if defined(__i386__)
asm volatile ("xchgb %b0, %h0\n"
"movw %w0, %1\n"
: "=q" (v)
: "m" (*(uint16_t *)ptr), "0" (v));
#else
uint8_t *d = (uint8_t *) ptr;
d[0] = v >> 8;
d[1] = v;
#endif
}
static inline void stl_be_p(void *ptr, int v)
{
#if defined(__i386__) || defined(__x86_64__)
asm volatile ("bswap %0\n"
"movl %0, %1\n"
: "=r" (v)
: "m" (*(uint32_t *)ptr), "0" (v));
#else
uint8_t *d = (uint8_t *) ptr;
d[0] = v >> 24;
d[1] = v >> 16;
d[2] = v >> 8;
d[3] = v;
#endif
}
static inline void stq_be_p(void *ptr, uint64_t v)
{
stl_be_p(ptr, v >> 32);
stl_be_p(ptr + 4, v);
}
/* float access */
static inline float32 ldfl_be_p(void *ptr)
{
union {
float32 f;
uint32_t i;
} u;
u.i = ldl_be_p(ptr);
return u.f;
}
static inline void stfl_be_p(void *ptr, float32 v)
{
union {
float32 f;
uint32_t i;
} u;
u.f = v;
stl_be_p(ptr, u.i);
}
static inline float64 ldfq_be_p(void *ptr)
{
CPU_DoubleU u;
u.l.upper = ldl_be_p(ptr);
u.l.lower = ldl_be_p(ptr + 4);
return u.d;
}
static inline void stfq_be_p(void *ptr, float64 v)
{
CPU_DoubleU u;
u.d = v;
stl_be_p(ptr, u.l.upper);
stl_be_p(ptr + 4, u.l.lower);
}
#else
static inline int lduw_be_p(void *ptr)
{
return *(uint16_t *)ptr;
}
static inline int ldsw_be_p(void *ptr)
{
return *(int16_t *)ptr;
}
static inline int ldl_be_p(void *ptr)
{
return *(uint32_t *)ptr;
}
static inline uint64_t ldq_be_p(void *ptr)
{
return *(uint64_t *)ptr;
}
static inline void stw_be_p(void *ptr, int v)
{
*(uint16_t *)ptr = v;
}
static inline void stl_be_p(void *ptr, int v)
{
*(uint32_t *)ptr = v;
}
static inline void stq_be_p(void *ptr, uint64_t v)
{
*(uint64_t *)ptr = v;
}
/* float access */
static inline float32 ldfl_be_p(void *ptr)
{
return *(float32 *)ptr;
}
static inline float64 ldfq_be_p(void *ptr)
{
return *(float64 *)ptr;
}
static inline void stfl_be_p(void *ptr, float32 v)
{
*(float32 *)ptr = v;
}
static inline void stfq_be_p(void *ptr, float64 v)
{
*(float64 *)ptr = v;
}
#endif
/* target CPU memory access functions */
#if defined(TARGET_WORDS_BIGENDIAN)
#define lduw_p(p) lduw_be_p(p)
#define ldsw_p(p) ldsw_be_p(p)
#define ldl_p(p) ldl_be_p(p)
#define ldq_p(p) ldq_be_p(p)
#define ldfl_p(p) ldfl_be_p(p)
#define ldfq_p(p) ldfq_be_p(p)
#define stw_p(p, v) stw_be_p(p, v)
#define stl_p(p, v) stl_be_p(p, v)
#define stq_p(p, v) stq_be_p(p, v)
#define stfl_p(p, v) stfl_be_p(p, v)
#define stfq_p(p, v) stfq_be_p(p, v)
#else
#define lduw_p(p) lduw_le_p(p)
#define ldsw_p(p) ldsw_le_p(p)
#define ldl_p(p) ldl_le_p(p)
#define ldq_p(p) ldq_le_p(p)
#define ldfl_p(p) ldfl_le_p(p)
#define ldfq_p(p) ldfq_le_p(p)
#define stw_p(p, v) stw_le_p(p, v)
#define stl_p(p, v) stl_le_p(p, v)
#define stq_p(p, v) stq_le_p(p, v)
#define stfl_p(p, v) stfl_le_p(p, v)
#define stfq_p(p, v) stfq_le_p(p, v)
#endif
/* MMU memory access macros */
#if defined(CONFIG_USER_ONLY)
/* On some host systems the guest address space is reserved on the host.
* This allows the guest address space to be offset to a convenient location.
*/
//#define GUEST_BASE 0x20000000
#define GUEST_BASE 0
/* All direct uses of g2h and h2g need to go away for usermode softmmu. */
#define g2h(x) ((void *)((unsigned long)(x) + GUEST_BASE))
#define h2g(x) ((target_ulong)(x - GUEST_BASE))
#define saddr(x) g2h(x)
#define laddr(x) g2h(x)
#else /* !CONFIG_USER_ONLY */
/* NOTE: we use double casts if pointers and target_ulong have
different sizes */
#define saddr(x) (uint8_t *)(long)(x)
#define laddr(x) (uint8_t *)(long)(x)
#endif
#define ldub_raw(p) ldub_p(laddr((p)))
#define ldsb_raw(p) ldsb_p(laddr((p)))
#define lduw_raw(p) lduw_p(laddr((p)))
#define ldsw_raw(p) ldsw_p(laddr((p)))
#define ldl_raw(p) ldl_p(laddr((p)))
#define ldq_raw(p) ldq_p(laddr((p)))
#define ldfl_raw(p) ldfl_p(laddr((p)))
#define ldfq_raw(p) ldfq_p(laddr((p)))
#define stb_raw(p, v) stb_p(saddr((p)), v)
#define stw_raw(p, v) stw_p(saddr((p)), v)
#define stl_raw(p, v) stl_p(saddr((p)), v)
#define stq_raw(p, v) stq_p(saddr((p)), v)
#define stfl_raw(p, v) stfl_p(saddr((p)), v)
#define stfq_raw(p, v) stfq_p(saddr((p)), v)
#if defined(CONFIG_USER_ONLY)
/* if user mode, no other memory access functions */
#define ldub(p) ldub_raw(p)
#define ldsb(p) ldsb_raw(p)
#define lduw(p) lduw_raw(p)
#define ldsw(p) ldsw_raw(p)
#define ldl(p) ldl_raw(p)
#define ldq(p) ldq_raw(p)
#define ldfl(p) ldfl_raw(p)
#define ldfq(p) ldfq_raw(p)
#define stb(p, v) stb_raw(p, v)
#define stw(p, v) stw_raw(p, v)
#define stl(p, v) stl_raw(p, v)
#define stq(p, v) stq_raw(p, v)
#define stfl(p, v) stfl_raw(p, v)
#define stfq(p, v) stfq_raw(p, v)
#define ldub_code(p) ldub_raw(p)
#define ldsb_code(p) ldsb_raw(p)
#define lduw_code(p) lduw_raw(p)
#define ldsw_code(p) ldsw_raw(p)
#define ldl_code(p) ldl_raw(p)
#define ldub_kernel(p) ldub_raw(p)
#define ldsb_kernel(p) ldsb_raw(p)
#define lduw_kernel(p) lduw_raw(p)
#define ldsw_kernel(p) ldsw_raw(p)
#define ldl_kernel(p) ldl_raw(p)
#define ldfl_kernel(p) ldfl_raw(p)
#define ldfq_kernel(p) ldfq_raw(p)
#define stb_kernel(p, v) stb_raw(p, v)
#define stw_kernel(p, v) stw_raw(p, v)
#define stl_kernel(p, v) stl_raw(p, v)
#define stq_kernel(p, v) stq_raw(p, v)
#define stfl_kernel(p, v) stfl_raw(p, v)
#define stfq_kernel(p, vt) stfq_raw(p, v)
#endif /* defined(CONFIG_USER_ONLY) */
/* page related stuff */
#define TARGET_PAGE_SIZE (1 << TARGET_PAGE_BITS)
#define TARGET_PAGE_MASK ~(TARGET_PAGE_SIZE - 1)
#define TARGET_PAGE_ALIGN(addr) (((addr) + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK)
/* ??? These should be the larger of unsigned long and target_ulong. */
extern unsigned long qemu_real_host_page_size;
extern unsigned long qemu_host_page_bits;
extern unsigned long qemu_host_page_size;
extern unsigned long qemu_host_page_mask;
#define HOST_PAGE_ALIGN(addr) (((addr) + qemu_host_page_size - 1) & qemu_host_page_mask)
/* same as PROT_xxx */
#define PAGE_READ 0x0001
#define PAGE_WRITE 0x0002
#define PAGE_EXEC 0x0004
#define PAGE_BITS (PAGE_READ | PAGE_WRITE | PAGE_EXEC)
#define PAGE_VALID 0x0008
/* original state of the write flag (used when tracking self-modifying
code */
#define PAGE_WRITE_ORG 0x0010
void page_dump(FILE *f);
int page_get_flags(target_ulong address);
void page_set_flags(target_ulong start, target_ulong end, int flags);
void page_unprotect_range(target_ulong data, target_ulong data_size);
#ifdef CONFIG_DM
#define SINGLE_CPU_DEFINES
#endif
#ifdef SINGLE_CPU_DEFINES
#if defined(TARGET_I386)
#define CPUState CPUX86State
#define cpu_init cpu_x86_init
#define cpu_exec cpu_x86_exec
#define cpu_gen_code cpu_x86_gen_code
#define cpu_signal_handler cpu_x86_signal_handler
#elif defined(TARGET_ARM)
#define CPUState CPUARMState
#define cpu_init cpu_arm_init
#define cpu_exec cpu_arm_exec
#define cpu_gen_code cpu_arm_gen_code
#define cpu_signal_handler cpu_arm_signal_handler
#elif defined(TARGET_SPARC)
#define CPUState CPUSPARCState
#define cpu_init cpu_sparc_init
#define cpu_exec cpu_sparc_exec
#define cpu_gen_code cpu_sparc_gen_code
#define cpu_signal_handler cpu_sparc_signal_handler
#elif defined(TARGET_PPC)
#define CPUState CPUPPCState
#define cpu_init cpu_ppc_init
#define cpu_exec cpu_ppc_exec
#define cpu_gen_code cpu_ppc_gen_code
#define cpu_signal_handler cpu_ppc_signal_handler
#elif defined(TARGET_MIPS)
#define CPUState CPUMIPSState
#define cpu_init cpu_mips_init
#define cpu_exec cpu_mips_exec
#define cpu_gen_code cpu_mips_gen_code
#define cpu_signal_handler cpu_mips_signal_handler
#elif defined(TARGET_SH4)
#define CPUState CPUSH4State
#define cpu_init cpu_sh4_init
#define cpu_exec cpu_sh4_exec
#define cpu_gen_code cpu_sh4_gen_code
#define cpu_signal_handler cpu_sh4_signal_handler
#else
#error unsupported target CPU
#endif
#else /* SINGLE_CPU_DEFINES */
#define CPUState CPUX86State
#define cpu_init cpu_x86_init
int main_loop(void);
#endif /* SINGLE_CPU_DEFINES */
void cpu_dump_state(CPUState *env, FILE *f,
int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
int flags);
void cpu_abort(CPUState *env, const char *fmt, ...);
extern CPUState *first_cpu;
extern CPUState *cpu_single_env;
extern int code_copy_enabled;
#define CPU_INTERRUPT_EXIT 0x01 /* wants exit from main loop */
#define CPU_INTERRUPT_HARD 0x02 /* hardware interrupt pending */
#define CPU_INTERRUPT_EXITTB 0x04 /* exit the current TB (use for x86 a20 case) */
#define CPU_INTERRUPT_TIMER 0x08 /* internal timer exception pending */
#define CPU_INTERRUPT_FIQ 0x10 /* Fast interrupt pending. */
#define CPU_INTERRUPT_HALT 0x20 /* CPU halt wanted */
void cpu_interrupt(CPUState *s, int mask);
void cpu_reset_interrupt(CPUState *env, int mask);
int cpu_breakpoint_insert(CPUState *env, target_ulong pc);
int cpu_breakpoint_remove(CPUState *env, target_ulong pc);
void cpu_single_step(CPUState *env, int enabled);
void cpu_reset(CPUState *s);
/* Return the physical page corresponding to a virtual one. Use it
only for debugging because no protection checks are done. Return -1
if no page found. */
target_ulong cpu_get_phys_page_debug(CPUState *env, target_ulong addr);
#define CPU_LOG_TB_OUT_ASM (1 << 0)
#define CPU_LOG_TB_IN_ASM (1 << 1)
#define CPU_LOG_TB_OP (1 << 2)
#define CPU_LOG_TB_OP_OPT (1 << 3)
#define CPU_LOG_INT (1 << 4)
#define CPU_LOG_EXEC (1 << 5)
#define CPU_LOG_PCALL (1 << 6)
#define CPU_LOG_IOPORT (1 << 7)
#define CPU_LOG_TB_CPU (1 << 8)
/* define log items */
typedef struct CPULogItem {
int mask;
const char *name;
const char *help;
} CPULogItem;
extern CPULogItem cpu_log_items[];
void cpu_set_log(int log_flags);
void cpu_set_log_filename(const char *filename);
int cpu_str_to_log_mask(const char *str);
/* IO ports API */
/* NOTE: as these functions may be even used when there is an isa
brige on non x86 targets, we always defined them */
#ifndef NO_CPU_IO_DEFS
void cpu_outb(CPUState *env, int addr, int val);
void cpu_outw(CPUState *env, int addr, int val);
void cpu_outl(CPUState *env, int addr, int val);
int cpu_inb(CPUState *env, int addr);
int cpu_inw(CPUState *env, int addr);
int cpu_inl(CPUState *env, int addr);
#endif
#if defined(__i386__) || defined(__x86_64__)
static __inline__ void atomic_set_bit(long nr, volatile void *addr)
{
__asm__ __volatile__(
"lock ; bts %1,%0"
:"=m" (*(volatile long *)addr)
:"dIr" (nr));
}
static __inline__ void atomic_clear_bit(long nr, volatile void *addr)
{
__asm__ __volatile__(
"lock ; btr %1,%0"
:"=m" (*(volatile long *)addr)
:"dIr" (nr));
}
#elif defined(__ia64__)
#include "ia64_intrinsic.h"
#define atomic_set_bit(nr, addr) ({ \
typeof(*addr) bit, old, new; \
volatile typeof(*addr) *m; \
\
m = (volatile typeof(*addr)*)(addr + nr / (8*sizeof(*addr))); \
bit = 1 << (nr % (8*sizeof(*addr))); \
do { \
old = *m; \
new = old | bit; \
} while (cmpxchg_acq(m, old, new) != old); \
})
#define atomic_clear_bit(nr, addr) ({ \
typeof(*addr) bit, old, new; \
volatile typeof(*addr) *m; \
\
m = (volatile typeof(*addr)*)(addr + nr / (8*sizeof(*addr))); \
bit = ~(1 << (nr % (8*sizeof(*addr)))); \
do { \
old = *m; \
new = old & bit; \
} while (cmpxchg_acq(m, old, new) != old); \
})
#endif
/* memory API */
extern uint64_t phys_ram_size;
extern int phys_ram_fd;
extern uint8_t *phys_ram_base;
extern uint8_t *phys_ram_dirty;
/* physical memory access */
#define TLB_INVALID_MASK (1 << 3)
#define IO_MEM_SHIFT 4
#define IO_MEM_NB_ENTRIES (1 << (TARGET_PAGE_BITS - IO_MEM_SHIFT))
#define IO_MEM_RAM (0 << IO_MEM_SHIFT) /* hardcoded offset */
#define IO_MEM_ROM (1 << IO_MEM_SHIFT) /* hardcoded offset */
#define IO_MEM_UNASSIGNED (2 << IO_MEM_SHIFT)
#define IO_MEM_NOTDIRTY (4 << IO_MEM_SHIFT) /* used internally, never use directly */
/* acts like a ROM when read and like a device when written. As an
exception, the write memory callback gets the ram offset instead of
the physical address */
#define IO_MEM_ROMD (1)
typedef void CPUWriteMemoryFunc(void *opaque, target_phys_addr_t addr, uint32_t value);
typedef uint32_t CPUReadMemoryFunc(void *opaque, target_phys_addr_t addr);
void cpu_register_physical_memory(target_phys_addr_t start_addr,
unsigned long size,
unsigned long phys_offset);
int cpu_register_io_memory(int io_index,
CPUReadMemoryFunc **mem_read,
CPUWriteMemoryFunc **mem_write,
void *opaque);
CPUWriteMemoryFunc **cpu_get_io_memory_write(int io_index);
CPUReadMemoryFunc **cpu_get_io_memory_read(int io_index);
void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
int len, int is_write);
static inline void cpu_physical_memory_read(target_phys_addr_t addr,
uint8_t *buf, int len)
{
cpu_physical_memory_rw(addr, buf, len, 0);
}
static inline void cpu_physical_memory_write(target_phys_addr_t addr,
const uint8_t *buf, int len)
{
cpu_physical_memory_rw(addr, (uint8_t *)buf, len, 1);
}
uint32_t ldub_phys(target_phys_addr_t addr);
uint32_t lduw_phys(target_phys_addr_t addr);
uint32_t ldl_phys(target_phys_addr_t addr);
uint64_t ldq_phys(target_phys_addr_t addr);
void stl_phys_notdirty(target_phys_addr_t addr, uint32_t val);
void stb_phys(target_phys_addr_t addr, uint32_t val);
void stw_phys(target_phys_addr_t addr, uint32_t val);
void stl_phys(target_phys_addr_t addr, uint32_t val);
void stq_phys(target_phys_addr_t addr, uint64_t val);
void cpu_physical_memory_write_rom(target_phys_addr_t addr,
const uint8_t *buf, int len);
int cpu_memory_rw_debug(CPUState *env, target_ulong addr,
uint8_t *buf, int len, int is_write);
#define VGA_DIRTY_FLAG 0x01
#define CODE_DIRTY_FLAG 0x02
/* read dirty bit (return 0 or 1) */
static inline int cpu_physical_memory_is_dirty(ram_addr_t addr)
{
return phys_ram_dirty[addr >> TARGET_PAGE_BITS] == 0xff;
}
static inline int cpu_physical_memory_get_dirty(ram_addr_t addr,
int dirty_flags)
{
return phys_ram_dirty[addr >> TARGET_PAGE_BITS] & dirty_flags;
}
static inline void cpu_physical_memory_set_dirty(ram_addr_t addr)
{
phys_ram_dirty[addr >> TARGET_PAGE_BITS] = 0xff;
}
void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
int dirty_flags);
void cpu_tlb_update_dirty(CPUState *env);
void dump_exec_info(FILE *f,
int (*cpu_fprintf)(FILE *f, const char *fmt, ...));
/*******************************************/
/* host CPU ticks (if available) */
#if defined(__powerpc__)
static inline uint32_t get_tbl(void)
{
uint32_t tbl;
asm volatile("mftb %0" : "=r" (tbl));
return tbl;
}
static inline uint32_t get_tbu(void)
{
uint32_t tbl;
asm volatile("mftbu %0" : "=r" (tbl));
return tbl;
}
static inline int64_t cpu_get_real_ticks(void)
{
uint32_t l, h, h1;
/* NOTE: we test if wrapping has occurred */
do {
h = get_tbu();
l = get_tbl();
h1 = get_tbu();
} while (h != h1);
return ((int64_t)h << 32) | l;
}
#elif defined(__i386__)
static inline int64_t cpu_get_real_ticks(void)
{
int64_t val;
asm volatile ("rdtsc" : "=A" (val));
return val;
}
#elif defined(__x86_64__)
static inline int64_t cpu_get_real_ticks(void)
{
uint32_t low,high;
int64_t val;
asm volatile("rdtsc" : "=a" (low), "=d" (high));
val = high;
val <<= 32;
val |= low;
return val;
}
#elif defined(__ia64)
static inline int64_t cpu_get_real_ticks(void)
{
int64_t val;
asm volatile ("mov %0 = ar.itc" : "=r"(val) :: "memory");
return val;
}
#elif defined(__s390__)
static inline int64_t cpu_get_real_ticks(void)
{
int64_t val;
asm volatile("stck 0(%1)" : "=m" (val) : "a" (&val) : "cc");
return val;
}
#elif defined(__sparc_v9__)
static inline int64_t cpu_get_real_ticks (void)
{
#if defined(_LP64)
uint64_t rval;
asm volatile("rd %%tick,%0" : "=r"(rval));
return rval;
#else
union {
uint64_t i64;
struct {
uint32_t high;
uint32_t low;
} i32;
} rval;
asm volatile("rd %%tick,%1; srlx %1,32,%0"
: "=r"(rval.i32.high), "=r"(rval.i32.low));
return rval.i64;
#endif
}
#endif
/* profiling */
#ifdef CONFIG_PROFILER
static inline int64_t profile_getclock(void)
{
return cpu_get_real_ticks();
}
extern int64_t kqemu_time, kqemu_time_start;
extern int64_t qemu_time, qemu_time_start;
extern int64_t tlb_flush_time;
extern int64_t kqemu_exec_count;
extern int64_t dev_time;
extern int64_t kqemu_ret_int_count;
extern int64_t kqemu_ret_excp_count;
extern int64_t kqemu_ret_intr_count;
#endif
#endif /* CPU_ALL_H */
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/*
* GPIO Button Hotplug driver
*
* Copyright (C) 2012 Felix Fietkau <nbd@nbd.name>
* Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
*
* Based on the diag.c - GPIO interface driver for Broadcom boards
* Copyright (C) 2006 Mike Baker <mbm@openwrt.org>,
* Copyright (C) 2006-2007 Felix Fietkau <nbd@nbd.name>
* Copyright (C) 2008 Andy Boyett <agb@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/version.h>
#include <linux/kmod.h>
#include <linux/workqueue.h>
#include <linux/skbuff.h>
#include <linux/netlink.h>
#include <linux/kobject.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/of_gpio.h>
#include <linux/gpio_keys.h>
#define DRV_NAME "gpio-keys"
#define BH_SKB_SIZE 2048
#define PFX DRV_NAME ": "
#undef BH_DEBUG
#ifdef BH_DEBUG
#define BH_DBG(fmt, args...) printk(KERN_DEBUG "%s: " fmt, DRV_NAME, ##args )
#else
#define BH_DBG(fmt, args...) do {} while (0)
#endif
#define BH_ERR(fmt, args...) printk(KERN_ERR "%s: " fmt, DRV_NAME, ##args )
struct bh_priv {
unsigned long seen;
};
struct bh_event {
const char *name;
unsigned int type;
char *action;
unsigned long seen;
struct sk_buff *skb;
struct work_struct work;
};
struct bh_map {
unsigned int code;
const char *name;
};
struct gpio_keys_button_data {
struct delayed_work work;
struct bh_priv bh;
int last_state;
int count;
int threshold;
int can_sleep;
struct gpio_keys_button *b;
};
extern u64 uevent_next_seqnum(void);
#define BH_MAP(_code, _name) \
{ \
.code = (_code), \
.name = (_name), \
}
static struct bh_map button_map[] = {
BH_MAP(BTN_0, "BTN_0"),
BH_MAP(BTN_1, "BTN_1"),
BH_MAP(BTN_2, "BTN_2"),
BH_MAP(BTN_3, "BTN_3"),
BH_MAP(BTN_4, "BTN_4"),
BH_MAP(BTN_5, "BTN_5"),
BH_MAP(BTN_6, "BTN_6"),
BH_MAP(BTN_7, "BTN_7"),
BH_MAP(BTN_8, "BTN_8"),
BH_MAP(BTN_9, "BTN_9"),
BH_MAP(KEY_BRIGHTNESS_ZERO, "brightness_zero"),
BH_MAP(KEY_CONFIG, "config"),
BH_MAP(KEY_COPY, "copy"),
BH_MAP(KEY_EJECTCD, "eject"),
BH_MAP(KEY_HELP, "help"),
BH_MAP(KEY_LIGHTS_TOGGLE, "lights_toggle"),
BH_MAP(KEY_PHONE, "phone"),
BH_MAP(KEY_POWER, "power"),
BH_MAP(KEY_RESTART, "reset"),
BH_MAP(KEY_RFKILL, "rfkill"),
BH_MAP(KEY_VIDEO, "video"),
BH_MAP(KEY_WIMAX, "wwan"),
BH_MAP(KEY_WLAN, "wlan"),
BH_MAP(KEY_WPS_BUTTON, "wps"),
};
/* -------------------------------------------------------------------------*/
static __printf(3, 4)
int bh_event_add_var(struct bh_event *event, int argv, const char *format, ...)
{
static char buf[128];
char *s;
va_list args;
int len;
if (argv)
return 0;
va_start(args, format);
len = vsnprintf(buf, sizeof(buf), format, args);
va_end(args);
if (len >= sizeof(buf)) {
WARN(1, "buffer size too small");
return -ENOMEM;
}
s = skb_put(event->skb, len + 1);
strcpy(s, buf);
BH_DBG("added variable '%s'\n", s);
return 0;
}
static int button_hotplug_fill_event(struct bh_event *event)
{
int ret;
ret = bh_event_add_var(event, 0, "HOME=%s", "/");
if (ret)
return ret;
ret = bh_event_add_var(event, 0, "PATH=%s",
"/sbin:/bin:/usr/sbin:/usr/bin");
if (ret)
return ret;
ret = bh_event_add_var(event, 0, "SUBSYSTEM=%s", "button");
if (ret)
return ret;
ret = bh_event_add_var(event, 0, "ACTION=%s", event->action);
if (ret)
return ret;
ret = bh_event_add_var(event, 0, "BUTTON=%s", event->name);
if (ret)
return ret;
if (event->type == EV_SW) {
ret = bh_event_add_var(event, 0, "TYPE=%s", "switch");
if (ret)
return ret;
}
ret = bh_event_add_var(event, 0, "SEEN=%ld", event->seen);
if (ret)
return ret;
ret = bh_event_add_var(event, 0, "SEQNUM=%llu", uevent_next_seqnum());
return ret;
}
static void button_hotplug_work(struct work_struct *work)
{
struct bh_event *event = container_of(work, struct bh_event, work);
int ret = 0;
event->skb = alloc_skb(BH_SKB_SIZE, GFP_KERNEL);
if (!event->skb)
goto out_free_event;
ret = bh_event_add_var(event, 0, "%s@", event->action);
if (ret)
goto out_free_skb;
ret = button_hotplug_fill_event(event);
if (ret)
goto out_free_skb;
NETLINK_CB(event->skb).dst_group = 1;
broadcast_uevent(event->skb, 0, 1, GFP_KERNEL);
out_free_skb:
if (ret) {
BH_ERR("work error %d\n", ret);
kfree_skb(event->skb);
}
out_free_event:
kfree(event);
}
static int button_hotplug_create_event(const char *name, unsigned int type,
unsigned long seen, int pressed)
{
struct bh_event *event;
BH_DBG("create event, name=%s, seen=%lu, pressed=%d\n",
name, seen, pressed);
event = kzalloc(sizeof(*event), GFP_KERNEL);
if (!event)
return -ENOMEM;
event->name = name;
event->type = type;
event->seen = seen;
event->action = pressed ? "pressed" : "released";
INIT_WORK(&event->work, (void *)(void *)button_hotplug_work);
schedule_work(&event->work);
return 0;
}
/* -------------------------------------------------------------------------*/
static int button_get_index(unsigned int code)
{
int i;
for (i = 0; i < ARRAY_SIZE(button_map); i++)
if (button_map[i].code == code)
return i;
return -1;
}
static void button_hotplug_event(struct gpio_keys_button_data *data,
unsigned int type, int value)
{
struct bh_priv *priv = &data->bh;
unsigned long seen = jiffies;
int btn;
BH_DBG("event type=%u, code=%u, value=%d\n", type, data->b->code, value);
if ((type != EV_KEY) && (type != EV_SW))
return;
btn = button_get_index(data->b->code);
if (btn < 0)
return;
button_hotplug_create_event(button_map[btn].name, type,
(seen - priv->seen) / HZ, value);
priv->seen = seen;
}
struct gpio_keys_button_dev {
int polled;
struct delayed_work work;
struct device *dev;
struct gpio_keys_platform_data *pdata;
struct gpio_keys_button_data data[0];
};
static int gpio_button_get_value(struct gpio_keys_button_data *bdata)
{
int val;
if (bdata->can_sleep)
val = !!gpio_get_value_cansleep(bdata->b->gpio);
else
val = !!gpio_get_value(bdata->b->gpio);
return val ^ bdata->b->active_low;
}
static void gpio_keys_polled_check_state(struct gpio_keys_button_data *bdata)
{
int state = gpio_button_get_value(bdata);
if (state != bdata->last_state) {
unsigned int type = bdata->b->type ?: EV_KEY;
if (bdata->count < bdata->threshold) {
bdata->count++;
return;
}
if ((bdata->last_state != -1) || (type == EV_SW))
button_hotplug_event(bdata, type, state);
bdata->last_state = state;
}
bdata->count = 0;
}
static void gpio_keys_polled_queue_work(struct gpio_keys_button_dev *bdev)
{
struct gpio_keys_platform_data *pdata = bdev->pdata;
unsigned long delay = msecs_to_jiffies(pdata->poll_interval);
if (delay >= HZ)
delay = round_jiffies_relative(delay);
schedule_delayed_work(&bdev->work, delay);
}
static void gpio_keys_polled_poll(struct work_struct *work)
{
struct gpio_keys_button_dev *bdev =
container_of(work, struct gpio_keys_button_dev, work.work);
int i;
for (i = 0; i < bdev->pdata->nbuttons; i++) {
struct gpio_keys_button_data *bdata = &bdev->data[i];
gpio_keys_polled_check_state(bdata);
}
gpio_keys_polled_queue_work(bdev);
}
static void gpio_keys_polled_close(struct gpio_keys_button_dev *bdev)
{
struct gpio_keys_platform_data *pdata = bdev->pdata;
cancel_delayed_work_sync(&bdev->work);
if (pdata->disable)
pdata->disable(bdev->dev);
}
static irqreturn_t button_handle_irq(int irq, void *_bdata)
{
struct gpio_keys_button_data *bdata = (struct gpio_keys_button_data *) _bdata;
button_hotplug_event(bdata, bdata->b->type ?: EV_KEY, gpio_button_get_value(bdata));
return IRQ_HANDLED;
}
#ifdef CONFIG_OF
static struct gpio_keys_platform_data *
gpio_keys_get_devtree_pdata(struct device *dev)
{
struct device_node *node, *pp;
struct gpio_keys_platform_data *pdata;
struct gpio_keys_button *button;
int error;
int nbuttons;
int i = 0;
node = dev->of_node;
if (!node)
return NULL;
nbuttons = of_get_child_count(node);
if (nbuttons == 0)
return NULL;
pdata = devm_kzalloc(dev, sizeof(*pdata) + nbuttons * (sizeof *button),
GFP_KERNEL);
if (!pdata) {
error = -ENOMEM;
goto err_out;
}
pdata->buttons = (struct gpio_keys_button *)(pdata + 1);
pdata->nbuttons = nbuttons;
pdata->rep = !!of_get_property(node, "autorepeat", NULL);
of_property_read_u32(node, "poll-interval", &pdata->poll_interval);
for_each_child_of_node(node, pp) {
enum of_gpio_flags flags;
if (!of_find_property(pp, "gpios", NULL)) {
pdata->nbuttons--;
dev_warn(dev, "Found button without gpios\n");
continue;
}
button = &pdata->buttons[i++];
button->gpio = of_get_gpio_flags(pp, 0, &flags);
if (button->gpio < 0) {
error = button->gpio;
if (error != -ENOENT) {
if (error != -EPROBE_DEFER)
dev_err(dev,
"Failed to get gpio flags, error: %d\n",
error);
return ERR_PTR(error);
}
} else {
button->active_low = flags & OF_GPIO_ACTIVE_LOW;
}
if (of_property_read_u32(pp, "linux,code", &button->code)) {
dev_err(dev, "Button without keycode: 0x%x\n",
button->gpio);
error = -EINVAL;
goto err_out;
}
button->desc = of_get_property(pp, "label", NULL);
if (of_property_read_u32(pp, "linux,input-type", &button->type))
button->type = EV_KEY;
button->wakeup = !!of_get_property(pp, "gpio-key,wakeup", NULL);
if (of_property_read_u32(pp, "debounce-interval",
&button->debounce_interval))
button->debounce_interval = 5;
}
if (pdata->nbuttons == 0) {
error = -EINVAL;
goto err_out;
}
return pdata;
err_out:
return ERR_PTR(error);
}
static struct of_device_id gpio_keys_of_match[] = {
{ .compatible = "gpio-keys", },
{ },
};
MODULE_DEVICE_TABLE(of, gpio_keys_of_match);
static struct of_device_id gpio_keys_polled_of_match[] = {
{ .compatible = "gpio-keys-polled", },
{ },
};
MODULE_DEVICE_TABLE(of, gpio_keys_polled_of_match);
#else
static inline struct gpio_keys_platform_data *
gpio_keys_get_devtree_pdata(struct device *dev)
{
return NULL;
}
#endif
static int gpio_keys_button_probe(struct platform_device *pdev,
struct gpio_keys_button_dev **_bdev, int polled)
{
struct gpio_keys_platform_data *pdata = pdev->dev.platform_data;
struct device *dev = &pdev->dev;
struct gpio_keys_button_dev *bdev;
struct gpio_keys_button *buttons;
int error;
int i;
if (!pdata) {
pdata = gpio_keys_get_devtree_pdata(dev);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
if (!pdata) {
dev_err(dev, "missing platform data\n");
return -EINVAL;
}
}
if (polled && !pdata->poll_interval) {
dev_err(dev, "missing poll_interval value\n");
return -EINVAL;
}
buttons = devm_kzalloc(dev, pdata->nbuttons * sizeof(struct gpio_keys_button),
GFP_KERNEL);
if (!buttons) {
dev_err(dev, "no memory for button data\n");
return -ENOMEM;
}
memcpy(buttons, pdata->buttons, pdata->nbuttons * sizeof(struct gpio_keys_button));
bdev = devm_kzalloc(dev, sizeof(struct gpio_keys_button_dev) +
pdata->nbuttons * sizeof(struct gpio_keys_button_data),
GFP_KERNEL);
if (!bdev) {
dev_err(dev, "no memory for private data\n");
return -ENOMEM;
}
bdev->polled = polled;
for (i = 0; i < pdata->nbuttons; i++) {
struct gpio_keys_button *button = &buttons[i];
struct gpio_keys_button_data *bdata = &bdev->data[i];
unsigned int gpio = button->gpio;
if (button->wakeup) {
dev_err(dev, DRV_NAME "does not support wakeup\n");
return -EINVAL;
}
error = devm_gpio_request(dev, gpio,
button->desc ? button->desc : DRV_NAME);
if (error) {
dev_err(dev, "unable to claim gpio %u, err=%d\n",
gpio, error);
return error;
}
error = gpio_direction_input(gpio);
if (error) {
dev_err(dev,
"unable to set direction on gpio %u, err=%d\n",
gpio, error);
return error;
}
bdata->can_sleep = gpio_cansleep(gpio);
bdata->last_state = -1;
if (bdev->polled)
bdata->threshold = DIV_ROUND_UP(button->debounce_interval,
pdata->poll_interval);
else
bdata->threshold = 1;
bdata->b = &pdata->buttons[i];
}
bdev->dev = &pdev->dev;
bdev->pdata = pdata;
platform_set_drvdata(pdev, bdev);
*_bdev = bdev;
return 0;
}
static int gpio_keys_probe(struct platform_device *pdev)
{
struct gpio_keys_platform_data *pdata;
struct gpio_keys_button_dev *bdev;
int ret, i;
ret = gpio_keys_button_probe(pdev, &bdev, 0);
if (ret)
return ret;
pdata = bdev->pdata;
for (i = 0; i < pdata->nbuttons; i++) {
struct gpio_keys_button *button = &pdata->buttons[i];
struct gpio_keys_button_data *bdata = &bdev->data[i];
if (!button->irq)
button->irq = gpio_to_irq(button->gpio);
if (button->irq < 0) {
dev_err(&pdev->dev, "failed to get irq for gpio:%d\n", button->gpio);
continue;
}
ret = devm_request_threaded_irq(&pdev->dev, button->irq, NULL, button_handle_irq,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
dev_name(&pdev->dev), bdata);
if (ret < 0)
dev_err(&pdev->dev, "failed to request irq:%d for gpio:%d\n", button->irq, button->gpio);
else
dev_dbg(&pdev->dev, "gpio:%d has irq:%d\n", button->gpio, button->irq);
if (bdata->b->type == EV_SW)
button_hotplug_event(bdata, EV_SW, gpio_button_get_value(bdata));
}
return 0;
}
static int gpio_keys_polled_probe(struct platform_device *pdev)
{
struct gpio_keys_platform_data *pdata;
struct gpio_keys_button_dev *bdev;
int ret;
int i;
ret = gpio_keys_button_probe(pdev, &bdev, 1);
if (ret)
return ret;
INIT_DELAYED_WORK(&bdev->work, gpio_keys_polled_poll);
pdata = bdev->pdata;
if (pdata->enable)
pdata->enable(bdev->dev);
for (i = 0; i < pdata->nbuttons; i++)
gpio_keys_polled_check_state(&bdev->data[i]);
gpio_keys_polled_queue_work(bdev);
return ret;
}
static int gpio_keys_remove(struct platform_device *pdev)
{
struct gpio_keys_button_dev *bdev = platform_get_drvdata(pdev);
platform_set_drvdata(pdev, NULL);
if (bdev->polled)
gpio_keys_polled_close(bdev);
return 0;
}
static struct platform_driver gpio_keys_driver = {
.probe = gpio_keys_probe,
.remove = gpio_keys_remove,
.driver = {
.name = "gpio-keys",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(gpio_keys_of_match),
},
};
static struct platform_driver gpio_keys_polled_driver = {
.probe = gpio_keys_polled_probe,
.remove = gpio_keys_remove,
.driver = {
.name = "gpio-keys-polled",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(gpio_keys_polled_of_match),
},
};
static int __init gpio_button_init(void)
{
int ret;
ret = platform_driver_register(&gpio_keys_driver);
if (ret)
return ret;
ret = platform_driver_register(&gpio_keys_polled_driver);
if (ret)
platform_driver_unregister(&gpio_keys_driver);
return ret;
}
static void __exit gpio_button_exit(void)
{
platform_driver_unregister(&gpio_keys_driver);
platform_driver_unregister(&gpio_keys_polled_driver);
}
module_init(gpio_button_init);
module_exit(gpio_button_exit);
MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
MODULE_AUTHOR("Felix Fietkau <nbd@nbd.name>");
MODULE_DESCRIPTION("Polled GPIO Buttons hotplug driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" DRV_NAME);
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