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#include "plugin.h"
#include "fixedpoint.h"
#include "lib/helper.h"
#include "lib/pluginlib_exit.h"
#include "SDL.h"
#include "SDL_video.h"
#ifdef COMBINED_SDL
#error deprecated
#endif
/* SDL program */
extern int my_main(int argc, char *argv[]);
void *audiobuf = NULL;
unsigned int sdl_thread_id, main_thread_id;
bool printf_enabled = true;
static void (*exit_cb)(void) = NULL;
/* sets the exit handler presented to the program */
void rbsdl_atexit(void (*cb)(void))
{
if(exit_cb)
{
rb->splash(HZ, "WARNING: multiple exit handlers!");
}
exit_cb = cb;
}
/* called by program */
void rb_exit(int rc)
{
if(rb->thread_self() == main_thread_id) /* rockbox main thread */
exit(rc);
else
rb->thread_exit();
}
/* exit handler, called by rockbox */
void cleanup(void)
{
if(exit_cb)
exit_cb();
if(exit_cb != SDL_Quit)
SDL_Quit();
#if defined(HAVE_LCD_COLOR) && !defined(SIMULATOR) && !defined(RB_PROFILE)
#define USE_TIMER
#endif
#ifdef USE_TIMER
/* stop timer callback if there is one, since the memory it
* resides in could be overwritten */
rb->timer_unregister();
#endif
if(audiobuf)
memset(audiobuf, 0, 4); /* clear */
backlight_use_settings();
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
rb->cpu_boost(false);
#endif
}
/* 256KB */
static long main_stack[1024 * 1024 / 2];
int (*main_fn)(int argc, char *argv[]);
int prog_idx;
static void main_thread(void)
{
char *fallback[] = { "/blah", NULL };
#ifdef COMBINED_SDL
char **argv = programs[prog_idx].argv ? programs[prog_idx].argv : fallback;
int argc = programs[prog_idx].argv ? programs[prog_idx].argc : 1;
#else
char **argv = fallback;
int argc = 1;
#endif
int rc = main_fn(argc, argv);
if(rc != 0)
rb->splash(HZ * 2, SDL_GetError());
rb->thread_exit();
}
#if defined(CPU_ARM) && !defined(SIMULATOR)
#define CR_M (1 << 0) /* MMU enable */
#define CR_A (1 << 1) /* Alignment abort enable */
#define CR_C (1 << 2) /* Dcache enable */
#define CR_W (1 << 3) /* Write buffer enable */
#define CR_P (1 << 4) /* 32-bit exception handler */
#define CR_D (1 << 5) /* 32-bit data address range */
#define CR_L (1 << 6) /* Implementation defined */
#define CR_B (1 << 7) /* Big endian */
#define CR_S (1 << 8) /* System MMU protection */
#define CR_R (1 << 9) /* ROM MMU protection */
#define CR_F (1 << 10) /* Implementation defined */
#define CR_Z (1 << 11) /* Implementation defined */
#define CR_I (1 << 12) /* Icache enable */
#define CR_V (1 << 13) /* Vectors relocated to 0xffff0000 */
#define CR_RR (1 << 14) /* Round Robin cache replacement */
#define CR_L4 (1 << 15) /* LDR pc can set T bit */
#define CR_DT (1 << 16)
#ifdef CONFIG_MMU
#define CR_HA (1 << 17) /* Hardware management of Access Flag */
#else
#define CR_BR (1 << 17) /* MPU Background region enable (PMSA) */
#endif
#define CR_IT (1 << 18)
#define CR_ST (1 << 19)
#define CR_FI (1 << 21) /* Fast interrupt (lower latency mode) */
#define CR_U (1 << 22) /* Unaligned access operation */
#define CR_XP (1 << 23) /* Extended page tables */
#define CR_VE (1 << 24) /* Vectored interrupts */
#define CR_EE (1 << 25) /* Exception (Big) Endian */
#define CR_TRE (1 << 28) /* TEX remap enable */
#define CR_AFE (1 << 29) /* Access flag enable */
#define CR_TE (1 << 30) /* Thumb exception enable */
#define __LINUX_ARM_ARCH__ ARM_ARCH
#if __LINUX_ARM_ARCH__ >= 7
#define isb(option) __asm__ __volatile__ ("isb " #option : : : "memory")
#define dsb(option) __asm__ __volatile__ ("dsb " #option : : : "memory")
#define dmb(option) __asm__ __volatile__ ("dmb " #option : : : "memory")
#elif defined(CONFIG_CPU_XSC3) || __LINUX_ARM_ARCH__ == 6
#define isb(x) __asm__ __volatile__ ("mcr p15, 0, %0, c7, c5, 4" \
: : "r" (0) : "memory")
#define dsb(x) __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 4" \
: : "r" (0) : "memory")
#define dmb(x) __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" \
: : "r" (0) : "memory")
#elif defined(CONFIG_CPU_FA526)
#define isb(x) __asm__ __volatile__ ("mcr p15, 0, %0, c7, c5, 4" \
: : "r" (0) : "memory")
#define dsb(x) __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 4" \
: : "r" (0) : "memory")
#define dmb(x) __asm__ __volatile__ ("" : : : "memory")
#else
#define isb(x) __asm__ __volatile__ ("" : : : "memory")
#define dsb(x) __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 4" \
: : "r" (0) : "memory")
#define dmb(x) __asm__ __volatile__ ("" : : : "memory")
#endif
static inline unsigned long get_cr(void)
{
unsigned long val;
asm("mrc p15, 0, %0, c1, c0, 0 @ get CR" : "=r" (val) : : "cc");
return val;
}
static inline void set_cr(unsigned long val)
{
asm volatile("mcr p15, 0, %0, c1, c0, 0 @ set CR"
: : "r" (val) : "cc");
isb();
}
#endif
enum plugin_status plugin_start(const void *param)
{
(void) param;
#if defined(CPU_ARM) && !defined(SIMULATOR) && (ARM_ARCH >= 5)
/* (don't) set alignment trap. Will generate a data abort
* exception on ARM. */
set_cr(get_cr() | CR_A);
#endif
#if 0
char c = *((char*)NULL);
/* test alignment trap */
unsigned int x = 0x12345678;
char *p = ((char*)&x) + 1;
unsigned short *p2 = (unsigned short*)p;
rb->splashf(HZ, "%04x, %02x%02x", *p2, *(p+1), *p);
#endif
/* don't confuse this with the main SDL thread! */
main_thread_id = rb->thread_self();
/* we always use the audio buffer */
size_t sz;
audiobuf = rb->plugin_get_audio_buffer(&sz);
#if (CONFIG_PLATFORM & PLATFORM_NATIVE)
/* We are loaded as an overlay towards the end of the audio
* buffer. We must take care not to overwrite ourselves. */
if ((uintptr_t)audiobuf < (uintptr_t)plugin_start_addr)
{
uint32_t tmp_size = (uintptr_t)plugin_start_addr - (uintptr_t)audiobuf;
sz = MIN(sz, tmp_size);
}
#endif
/* wipe sig */
rb->memset(audiobuf, 0, sz);
if(init_memory_pool(sz, audiobuf) == (size_t) -1)
{
rb->splashf(HZ*2, "TLSF init failed!");
return PLUGIN_ERROR;
}
main_fn = my_main;
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
rb->cpu_boost(true);
#endif
backlight_ignore_timeout();
/* set the real exit handler */
#undef rb_atexit
rb_atexit(cleanup);
/* make a new thread to use a bigger stack and higher priority than otherwise accessible */
sdl_thread_id = rb->create_thread(main_thread, main_stack,
sizeof(main_stack), 0, "sdl_main"
IF_PRIO(, PRIORITY_USER_INTERFACE) // we need other threads still
IF_COP(, CPU));
rb->thread_wait(sdl_thread_id);
rb->sleep(HZ); /* wait a second in case there's an error message on screen */
return PLUGIN_OK;
}
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