diff options
Diffstat (limited to 'arch/mips/lib/cache.c')
| -rw-r--r-- | arch/mips/lib/cache.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/mips/lib/cache.c b/arch/mips/lib/cache.c index ec652f0fba..d23b38d6b9 100644 --- a/arch/mips/lib/cache.c +++ b/arch/mips/lib/cache.c @@ -6,6 +6,7 @@ #include <common.h> #include <cpu_func.h> +#include <malloc.h> #include <asm/cache.h> #include <asm/cacheops.h> #include <asm/cm.h> @@ -197,3 +198,45 @@ void dcache_disable(void) /* ensure the pipeline doesn't contain now-invalid instructions */ instruction_hazard_barrier(); } + +#ifdef CONFIG_SYS_NONCACHED_MEMORY +static unsigned long noncached_start; +static unsigned long noncached_end; +static unsigned long noncached_next; + +void noncached_set_region(void) +{ +} + +int noncached_init(void) +{ + phys_addr_t start, end; + size_t size; + + /* If this calculation changes, update board_f.c:reserve_noncached() */ + end = ALIGN(mem_malloc_start, MMU_SECTION_SIZE) - MMU_SECTION_SIZE; + size = ALIGN(CONFIG_SYS_NONCACHED_MEMORY, MMU_SECTION_SIZE); + start = end - size; + + debug("mapping memory %pa-%pa non-cached\n", &start, &end); + + noncached_start = start; + noncached_end = end; + noncached_next = start; + + return 0; +} + +phys_addr_t noncached_alloc(size_t size, size_t align) +{ + phys_addr_t next = ALIGN(noncached_next, align); + + if (next >= noncached_end || (noncached_end - next) < size) + return 0; + + debug("allocated %zu bytes of uncached memory @%pa\n", size, &next); + noncached_next = next + size; + + return CKSEG1ADDR(next); +} +#endif /* CONFIG_SYS_NONCACHED_MEMORY */ |