5 * SPDX-License-Identifier: GPL-2.0+
8 /* for now: just dummy functions to satisfy the linker */
13 #ifndef CONFIG_SYS_CACHELINE_SIZE
14 #define CONFIG_SYS_CACHELINE_SIZE 32
18 * Flush range from all levels of d-cache/unified-cache.
19 * Affects the range [start, start + size - 1].
21 __weak void flush_cache(unsigned long start, unsigned long size)
23 flush_dcache_range(start, start + size);
27 * Default implementation:
28 * do a range flush for the entire range
30 __weak void flush_dcache_all(void)
36 * Default implementation of enable_caches()
37 * Real implementation should be in platform code
39 __weak void enable_caches(void)
41 puts("WARNING: Caches not enabled\n");
44 __weak void invalidate_dcache_range(unsigned long start, unsigned long stop)
46 /* An empty stub, real implementation should be in platform code */
48 __weak void flush_dcache_range(unsigned long start, unsigned long stop)
50 /* An empty stub, real implementation should be in platform code */
53 int check_cache_range(unsigned long start, unsigned long stop)
57 if (start & (CONFIG_SYS_CACHELINE_SIZE - 1))
60 if (stop & (CONFIG_SYS_CACHELINE_SIZE - 1))
64 warn_non_spl("CACHE: Misaligned operation at range [%08lx, %08lx]\n",
71 #ifdef CONFIG_SYS_NONCACHED_MEMORY
73 * Reserve one MMU section worth of address space below the malloc() area that
74 * will be mapped uncached.
76 static unsigned long noncached_start;
77 static unsigned long noncached_end;
78 static unsigned long noncached_next;
80 void noncached_init(void)
82 phys_addr_t start, end;
85 end = ALIGN(mem_malloc_start, MMU_SECTION_SIZE) - MMU_SECTION_SIZE;
86 size = ALIGN(CONFIG_SYS_NONCACHED_MEMORY, MMU_SECTION_SIZE);
89 debug("mapping memory %pa-%pa non-cached\n", &start, &end);
91 noncached_start = start;
93 noncached_next = start;
95 #ifndef CONFIG_SYS_DCACHE_OFF
96 mmu_set_region_dcache_behaviour(noncached_start, size, DCACHE_OFF);
100 phys_addr_t noncached_alloc(size_t size, size_t align)
102 phys_addr_t next = ALIGN(noncached_next, align);
104 if (next >= noncached_end || (noncached_end - next) < size)
107 debug("allocated %zu bytes of uncached memory @%pa\n", size, &next);
108 noncached_next = next + size;
112 #endif /* CONFIG_SYS_NONCACHED_MEMORY */
114 #if defined(CONFIG_SYS_THUMB_BUILD)
115 void invalidate_l2_cache(void)
117 unsigned int val = 0;
119 asm volatile("mcr p15, 1, %0, c15, c11, 0 @ invl l2 cache"
120 : : "r" (val) : "cc");