WhyCan Forum(哇酷开发者社区)

vsync = CF_BOOL(cf_get_item_by_name("vsync"));
sdl_flags |= (vsync?SDL_DOUBLEBUF:0);

cf_create_bool_item("vsync", "Synchronise the display with VBLANK", 0, GN_FLASE);

#ifdef DEVKIT8000
  SDL_Flip(screen);
#else
  if (vsync)
    SDL_Flip(screen);
  else
    SDL_UpdateRect(screen, 0, 0, 0, 0); 
#endif
  SDL_Flip(screen);
#endif

#if defined(TARGET_MIYOO)
static uint32_t oc_table[] = {
  ((96 * 2) << 16) | ((1 << 8) | (3 << 4)), 
  ((96 * 3) << 16) | ((2 << 8) | (3 << 4)), 
  ((96 * 4) << 16) | ((3 << 8) | (3 << 4)), 
  ((96 * 5) << 16) | ((4 << 8) | (3 << 4)), 
  ((96 * 6) << 16) | ((5 << 8) | (3 << 4)), 
  ((96 * 7) << 16) | ((6 << 8) | (3 << 4)), 
  ((96 * 8) << 16) | ((7 << 8) | (3 << 4)), 
  ((96 * 9) << 16) | ((8 << 8) | (3 << 4)), 
  ((96 * 10) << 16) | ((9 << 8) | (3 << 4)), 
  ((96 * 11) << 16) | ((10 << 8) | (3 << 4)), 
  ((96 * 12) << 16) | ((11 << 8) | (3 << 4)), 
  ((96 * 13) << 16) | ((12 << 8) | (3 << 4)), 
  ((96 * 14) << 16) | ((13 << 8) | (3 << 4)), 
  ((96 * 15) << 16) | ((14 << 8) | (3 << 4)), 
};
int oc_choices[] = {(2*96), (3*96), (4*96), (5*96), (6*96), (7*96), (8*96), (9*96), (10*96), (11*96), (12*96), (13*96), (14*96), (15*96)};
int oc_choices_size = sizeof(oc_choices)/sizeof(int);
#endif

#elif defined(TARGET_MIYOO)
    uint32_t x, v;
    uint32_t total=sizeof(oc_table)/sizeof(uint32_t);

    for(x=0; x<total; x++){
      if((oc_table[x] >> 16) >= mhz){
        memregs[0] = (1 << 31) | (oc_table[x] &  0x0000ffff);
        break;
      }    
    }    
    INFO("Set CPU clock: %d(0x%08x)", mhz, v);
#endif

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <time.h>
  
int main(int argc, char* argv[])
{
  int fd = open("/dev/mem", O_RDWR);
  if(fd < 0){
    printf("failed to open /dev/mem\n");
    return -1;
  }
   
  uint32_t M=0, N=0;
  uint8_t *mem = mmap(0, 4096, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0x10000000);
  if(mem == NULL){
    close(fd);
    printf("failed to mmap memory\n");
    return -1;
  }
  printf("MEM: 0x%08x\n", mem);
  printf("Cur CPCCR: 0x%08x\n", *((uint32_t*)(mem + 0x00)));
  printf("Cur CPPCR: 0x%08x\n", *((uint32_t*)(mem + 0x10)));
  printf("Cur CPPSR: 0x%08x\n", *((uint32_t*)(mem + 0x14)));
 
  // (12MHz * (84 + 2)) / (0 + 2) = 516MHz
  M = 84;
  N = 0;
  *((uint32_t*)(mem + 0x10)) = (M << 23) | (N < 18) | 0x00000520;
  printf("New CPCCR: 0x%08x\n", *((uint32_t*)(mem + 0x00)));
  printf("New CPPCR: 0x%08x\n", *((uint32_t*)(mem + 0x10)));
  printf("New CPPSR: 0x%08x\n", *((uint32_t*)(mem + 0x14)));
 
  munmap(mem, 4096);
  close(fd);
  return 0;
}

[    0.900000] ALSA device list:
[    0.900000]   #0: pocketgo audio card
[    0.910000] Waiting for root device /dev/mmcblk0p1...
[    0.950000] mmc0: host does not support reading read-only switch, assuming write-enable
[    0.970000] mmc0: new high speed SDHC card at address aaaa
[    0.970000] mmcblk0: mmc0:aaaa SL08G 7.40 GiB 
[    0.980000]  mmcblk0: p1 p2
[    1.020000] VFS: Mounted root (vfat filesystem) readonly on device 179:1.
[    1.030000] devtmpfs: mounted
[    1.030000] Freeing unused kernel memory: 1024K
[    1.550000] FAT-fs (mmcblk0p2): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[    3.020000] Adding 262140k swap on /mnt/.swap.img.  Priority:-2 extents:2 across:1687476k SSFS

[    0.860000] ALSA device list:
[    0.860000]   #0: pocketgo audio card
[    0.870000] Waiting for root device /dev/mmcblk0p1...
[    0.910000] mmc0: host does not support reading read-only switch, assuming write-enable
[    0.930000] mmc0: new high speed SDHC card at address aaaa
[    0.930000] mmcblk0: mmc0:aaaa SL08G 7.40 GiB 
[    0.940000]  mmcblk0: p1 p2
[    0.980000] VFS: Mounted root (vfat filesystem) readonly on device 179:1.
[    0.980000] devtmpfs: mounted
[    0.990000] Freeing unused kernel memory: 1024K
[    1.470000] FAT-fs (mmcblk0p2): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[    2.880000] Adding 262140k swap on /mnt/.swap.img.  Priority:-2 extents:2 across:1687476k SSFS

=== Memory bandwidth tests ===
 C copy backwards                                     :     83.7 MB/s (4.4%)
 C copy backwards (32 byte blocks)                    :     95.5 MB/s
 C copy backwards (64 byte blocks)                    :     95.4 MB/s
 C copy                                               :     95.6 MB/s
 C copy prefetched (32 bytes step)                    :     95.2 MB/s
 C copy prefetched (64 bytes step)                    :     95.6 MB/s
 C 2-pass copy                                        :     80.9 MB/s
 C 2-pass copy prefetched (32 bytes step)             :     81.6 MB/s
 C 2-pass copy prefetched (64 bytes step)             :     80.6 MB/s (0.1%)
 C fill                                               :    283.7 MB/s
 C fill (shuffle within 16 byte blocks)               :    283.7 MB/s
 C fill (shuffle within 32 byte blocks)               :    283.7 MB/s
 C fill (shuffle within 64 byte blocks)               :    283.7 MB/s
 ---
 standard memcpy                                      :     97.4 MB/s
 standard memset                                      :    283.7 MB/s
 ---
 ARM fill (STRD)                                      :    283.7 MB/s
 ARM fill (STM with 8 registers)                      :    544.2 MB/s
 ARM fill (STM with 4 registers)                      :    544.2 MB/s
 ARM copy prefetched (incr pld)                       :    128.8 MB/s
 ARM copy prefetched (wrap pld)                       :    128.8 MB/s
 ARM 2-pass copy prefetched (incr pld)                :    111.9 MB/s
 ARM 2-pass copy prefetched (wrap pld)                :    111.9 MB/s

=== Framebuffer read tests ===
 ARM copy (from framebuffer)                          :    128.9 MB/s
 ARM 2-pass copy (from framebuffer)                   :    110.1 MB/s

=== Memory latency test ===

block size : single random read / dual random read
      1024 :    1.0 ns          /     1.9 ns 
      2048 :    1.1 ns          /     2.3 ns 
      4096 :    1.2 ns          /     2.5 ns 
      8192 :    1.4 ns          /     2.7 ns 
     16384 :    1.9 ns          /     3.6 ns 
     32768 :  109.1 ns          /   226.5 ns 
     65536 :  177.1 ns          /   364.7 ns 
    131072 :  211.7 ns          /   434.9 ns 
    262144 :  229.7 ns          /   471.3 ns 
    524288 :  369.6 ns          /   751.2 ns 
   1048576 :  458.2 ns          /   928.7 ns 
   2097152 :  501.5 ns          /  1015.4 ns 
   4194304 :  521.8 ns          /  1056.0 ns 
   8388608 :  533.2 ns          /  1078.8 ns 
  16777216 :  539.3 ns          /  1090.9 ns 

=== Memory bandwidth tests ===
 C copy backwards                                     :     86.8 MB/s (4.3%)
 C copy backwards (32 byte blocks)                    :     98.4 MB/s
 C copy backwards (64 byte blocks)                    :     98.4 MB/s
 C copy                                               :     98.4 MB/s
 C copy prefetched (32 bytes step)                    :     98.2 MB/s
 C copy prefetched (64 bytes step)                    :     98.4 MB/s
 C 2-pass copy                                        :     85.3 MB/s (0.2%)
 C 2-pass copy prefetched (32 bytes step)             :     86.0 MB/s
 C 2-pass copy prefetched (64 bytes step)             :     85.3 MB/s
 C fill                                               :    284.2 MB/s
 C fill (shuffle within 16 byte blocks)               :    284.2 MB/s
 C fill (shuffle within 32 byte blocks)               :    284.2 MB/s
 C fill (shuffle within 64 byte blocks)               :    284.2 MB/s
 ---
 standard memcpy                                      :    101.4 MB/s
 standard memset                                      :    284.1 MB/s
 ---
 ARM fill (STRD)                                      :    284.2 MB/s
 ARM fill (STM with 8 registers)                      :    547.4 MB/s
 ARM fill (STM with 4 registers)                      :    545.2 MB/s
 ARM copy prefetched (incr pld)                       :    136.7 MB/s
 ARM copy prefetched (wrap pld)                       :    136.7 MB/s
 ARM 2-pass copy prefetched (incr pld)                :    119.0 MB/s
 ARM 2-pass copy prefetched (wrap pld)                :    119.0 MB/s

=== Framebuffer read tests ===
 ARM copy (from framebuffer)                          :    136.3 MB/s
 ARM 2-pass copy (from framebuffer)                   :    117.0 MB/s

=== Memory latency test ===

block size : single random read / dual random read
      1024 :    0.5 ns          /     1.0 ns 
      2048 :    0.6 ns          /     1.2 ns 
      4096 :    0.7 ns          /     1.3 ns 
      8192 :    0.7 ns          /     1.4 ns 
     16384 :    1.0 ns          /     2.0 ns 
     32768 :  114.6 ns          /   234.4 ns 
     65536 :  181.0 ns          /   367.4 ns 
    131072 :  214.6 ns          /   434.9 ns 
    262144 :  232.1 ns          /   469.9 ns 
    524288 :  363.2 ns          /   732.2 ns 
   1048576 :  436.1 ns          /   878.0 ns 
   2097152 :  487.8 ns          /   981.7 ns 
   4194304 :  508.1 ns          /  1022.2 ns 
   8388608 :  519.3 ns          /  1044.6 ns 
  16777216 :  525.2 ns          /  1056.4 ns

=== Memory bandwidth tests ===
 C copy backwards                                     :    110.1 MB/s (0.9%)
 C copy backwards (32 byte blocks)                    :    125.6 MB/s
 C copy backwards (64 byte blocks)                    :    125.6 MB/s
 C copy                                               :    125.6 MB/s
 C copy prefetched (32 bytes step)                    :    124.7 MB/s
 C copy prefetched (64 bytes step)                    :    125.6 MB/s
 C 2-pass copy                                        :    103.7 MB/s (0.1%)
 C 2-pass copy prefetched (32 bytes step)             :    104.9 MB/s
 C 2-pass copy prefetched (64 bytes step)             :    103.7 MB/s
 C fill                                               :    375.9 MB/s
 C fill (shuffle within 16 byte blocks)               :    375.7 MB/s
 C fill (shuffle within 32 byte blocks)               :    375.9 MB/s
 C fill (shuffle within 64 byte blocks)               :    375.8 MB/s
 ---
 standard memcpy                                      :    125.6 MB/s
 standard memset                                      :    375.8 MB/s
 ---
 ARM fill (STRD)                                      :    375.8 MB/s
 ARM fill (STM with 8 registers)                      :    717.0 MB/s
 ARM fill (STM with 4 registers)                      :    717.1 MB/s
 ARM copy prefetched (incr pld)                       :    165.6 MB/s
 ARM copy prefetched (wrap pld)                       :    165.6 MB/s
 ARM 2-pass copy prefetched (incr pld)                :    142.9 MB/s
 ARM 2-pass copy prefetched (wrap pld)                :    143.0 MB/s

=== Framebuffer read tests ===
 ARM copy (from framebuffer)                          :    165.3 MB/s
 ARM 2-pass copy (from framebuffer)                   :    141.0 MB/s

=== Memory latency test ===

block size : single random read / dual random read
      1024 :    1.0 ns          /     1.9 ns 
      2048 :    1.1 ns          /     2.3 ns 
      4096 :    1.2 ns          /     2.5 ns 
      8192 :    1.3 ns          /     2.6 ns 
     16384 :    1.8 ns          /     3.3 ns 
     32768 :   80.6 ns          /   168.4 ns 
     65536 :  133.0 ns          /   275.8 ns 
    131072 :  159.6 ns          /   330.1 ns 
    262144 :  173.5 ns          /   358.1 ns 
    524288 :  280.7 ns          /   572.9 ns 
   1048576 :  344.2 ns          /   700.1 ns 
   2097152 :  382.2 ns          /   776.2 ns 
   4194304 :  398.1 ns          /   808.0 ns 
   8388608 :  407.0 ns          /   825.8 ns 
  16777216 :  411.7 ns          /   835.2 ns 

=== Memory bandwidth tests ===
 C copy backwards                                     :    114.8 MB/s (0.5%)
 C copy backwards (32 byte blocks)                    :    129.9 MB/s
 C copy backwards (64 byte blocks)                    :    129.9 MB/s
 C copy                                               :    130.4 MB/s
 C copy prefetched (32 bytes step)                    :    129.5 MB/s
 C copy prefetched (64 bytes step)                    :    130.4 MB/s
 C 2-pass copy                                        :    110.9 MB/s (3.6%)
 C 2-pass copy prefetched (32 bytes step)             :    111.1 MB/s
 C 2-pass copy prefetched (64 bytes step)             :    110.9 MB/s
 C fill                                               :    376.5 MB/s
 C fill (shuffle within 16 byte blocks)               :    376.6 MB/s
 C fill (shuffle within 32 byte blocks)               :    376.7 MB/s
 C fill (shuffle within 64 byte blocks)               :    376.5 MB/s
 ---
 standard memcpy                                      :    130.7 MB/s
 standard memset                                      :    376.7 MB/s
 ---
 ARM fill (STRD)                                      :    376.5 MB/s
 ARM fill (STM with 8 registers)                      :    721.4 MB/s
 ARM fill (STM with 4 registers)                      :    720.4 MB/s
 ARM copy prefetched (incr pld)                       :    175.1 MB/s
 ARM copy prefetched (wrap pld)                       :    175.1 MB/s
 ARM 2-pass copy prefetched (incr pld)                :    152.9 MB/s
 ARM 2-pass copy prefetched (wrap pld)                :    152.9 MB/s

=== Framebuffer read tests ===
 ARM copy (from framebuffer)                          :    174.8 MB/s
 ARM 2-pass copy (from framebuffer)                   :    150.7 MB/s

=== Memory latency test ===

block size : single random read / dual random read
      1024 :    0.5 ns          /     1.0 ns 
      2048 :    0.6 ns          /     1.2 ns 
      4096 :    0.7 ns          /     1.3 ns 
      8192 :    0.7 ns          /     1.4 ns 
     16384 :    1.0 ns          /     1.8 ns 
     32768 :   86.0 ns          /   177.0 ns 
     65536 :  137.5 ns          /   280.5 ns 
    131072 :  163.7 ns          /   333.1 ns 
    262144 :  177.3 ns          /   360.1 ns 
    524288 :  276.8 ns          /   559.5 ns 
   1048576 :  338.0 ns          /   682.1 ns 
   2097152 :  372.8 ns          /   752.0 ns 
   4194304 :  387.7 ns          /   781.7 ns 
   8388608 :  396.1 ns          /   798.5 ns 
  16777216 :  400.6 ns          /   807.5 ns