LXR qemu/include/qemu/cache-utils.h

   1#ifndef QEMU_CACHE_UTILS_H
   2#define QEMU_CACHE_UTILS_H
   3
   4#if defined(_ARCH_PPC)
   5
   6#include <stdint.h> /* uintptr_t */
   7
   8struct qemu_cache_conf {
   9    unsigned long dcache_bsize;
  10    unsigned long icache_bsize;
  11};
  12
  13extern struct qemu_cache_conf qemu_cache_conf;
  14
  15void qemu_cache_utils_init(char **envp);
  16
  17/* mildly adjusted code from tcg-dyngen.c */
  18static inline void flush_icache_range(uintptr_t start, uintptr_t stop)
  19{
  20    unsigned long p, start1, stop1;
  21    unsigned long dsize = qemu_cache_conf.dcache_bsize;
  22    unsigned long isize = qemu_cache_conf.icache_bsize;
  23
  24    start1 = start & ~(dsize - 1);
  25    stop1 = (stop + dsize - 1) & ~(dsize - 1);
  26    for (p = start1; p < stop1; p += dsize) {
  27        asm volatile ("dcbst 0,%0" : : "r"(p) : "memory");
  28    }
  29    asm volatile ("sync" : : : "memory");
  30
  31    start &= start & ~(isize - 1);
  32    stop1 = (stop + isize - 1) & ~(isize - 1);
  33    for (p = start1; p < stop1; p += isize) {
  34        asm volatile ("icbi 0,%0" : : "r"(p) : "memory");
  35    }
  36    asm volatile ("sync" : : : "memory");
  37    asm volatile ("isync" : : : "memory");
  38}
  39
  40#else
  41#define qemu_cache_utils_init(envp) do { (void) (envp); } while (0)
  42#endif
  43
  44#endif /* QEMU_CACHE_UTILS_H */
  45