xref: /illumos-kvm-cmd/cache-utils.h (revision 68396ea9)
1 #ifndef QEMU_CACHE_UTILS_H
2 #define QEMU_CACHE_UTILS_H
3 
4 #if defined(_ARCH_PPC)
5 struct qemu_cache_conf {
6     unsigned long dcache_bsize;
7     unsigned long icache_bsize;
8 };
9 
10 extern struct qemu_cache_conf qemu_cache_conf;
11 
12 void qemu_cache_utils_init(char **envp);
13 
14 /* mildly adjusted code from tcg-dyngen.c */
flush_icache_range(unsigned long start,unsigned long stop)15 static 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 /*
38  * Is this correct for PPC?
39  */
dma_flush_range(unsigned long start,unsigned long stop)40 static inline void dma_flush_range(unsigned long start, unsigned long stop)
41 {
42 }
43 
44 #elif defined(__ia64__)
flush_icache_range(unsigned long start,unsigned long stop)45 static inline void flush_icache_range(unsigned long start, unsigned long stop)
46 {
47     while (start < stop) {
48 	asm volatile ("fc %0" :: "r"(start));
49 	start += 32;
50     }
51     asm volatile (";;sync.i;;srlz.i;;");
52 }
53 #define dma_flush_range(start, end) flush_icache_range(start, end)
54 #define qemu_cache_utils_init(envp) do { (void) (envp); } while (0)
55 #else
dma_flush_range(unsigned long start,unsigned long stop)56 static inline void dma_flush_range(unsigned long start, unsigned long stop)
57 {
58 }
59 #define qemu_cache_utils_init(envp) do { (void) (envp); } while (0)
60 #endif
61 
62 #endif /* QEMU_CACHE_UTILS_H */
63