LXR qemu/cache-utils.h

   1#ifndef QEMU_CACHE_UTILS_H
   2#define QEMU_CACHE_UTILS_H
   3
   4#if defined(_ARCH_PPC)
   5struct qemu_cache_conf {
   6    unsigned long dcache_bsize;
   7    unsigned long icache_bsize;
   8};
   9
  10extern struct qemu_cache_conf qemu_cache_conf;
  11
  12void qemu_cache_utils_init(char **envp);
  13
  14/* mildly adjusted code from tcg-dyngen.c */
  15static inline void flush_icache_range(unsigned long start, unsigned long stop)
  16{
  17    unsigned long p, start1, stop1;
  18    unsigned long dsize = qemu_cache_conf.dcache_bsize;
  19    unsigned long isize = qemu_cache_conf.icache_bsize;
  20
  21    start1 = start & ~(dsize - 1);
  22    stop1 = (stop + dsize - 1) & ~(dsize - 1);
  23    for (p = start1; p < stop1; p += dsize) {
  24        asm volatile ("dcbst 0,%0" : : "r"(p) : "memory");
  25    }
  26    asm volatile ("sync" : : : "memory");
  27
  28    start &= start & ~(isize - 1);
  29    stop1 = (stop + isize - 1) & ~(isize - 1);
  30    for (p = start1; p < stop1; p += isize) {
  31        asm volatile ("icbi 0,%0" : : "r"(p) : "memory");
  32    }
  33    asm volatile ("sync" : : : "memory");
  34    asm volatile ("isync" : : : "memory");
  35}
  36
  37#else
  38#define qemu_cache_utils_init(envp) do { (void) (envp); } while (0)
  39#endif
  40
  41#endif /* QEMU_CACHE_UTILS_H */
  42