Introduce a function lmb_add_memory() to add available memory to the LMB memory map. Call this function during board init once the LMB data structures have been initialised.
Signed-off-by: Sughosh Ganu sughosh.ganu@linaro.org --- Changes since rfc: None
include/lmb.h | 12 ++++++++++++ lib/lmb.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 54 insertions(+)
diff --git a/include/lmb.h b/include/lmb.h index a308796d58..77e2a23c0d 100644 --- a/include/lmb.h +++ b/include/lmb.h @@ -40,6 +40,18 @@ struct lmb_region { void lmb_init_and_reserve(struct bd_info *bd, void *fdt_blob); void lmb_init_and_reserve_range(phys_addr_t base, phys_size_t size, void *fdt_blob); + +/** + * lmb_add_memory() - Add memory range for LMB allocations + * + * Add the entire available memory range to the pool of memory that + * can be used by the LMB module for allocations. + * + * Return: None + * + */ +void lmb_add_memory(void); + long lmb_add(phys_addr_t base, phys_size_t size); long lmb_reserve(phys_addr_t base, phys_size_t size); /** diff --git a/lib/lmb.c b/lib/lmb.c index 88352e9a25..db0874371a 100644 --- a/lib/lmb.c +++ b/lib/lmb.c @@ -239,6 +239,46 @@ void lmb_init_and_reserve(struct bd_info *bd, void *fdt_blob) lmb_reserve_common(fdt_blob); }
+/** + * lmb_add_memory() - Add memory range for LMB allocations + * + * Add the entire available memory range to the pool of memory that + * can be used by the LMB module for allocations. + * + * This can be overridden for specific boards/architectures. + * + * Return: None + * + */ +__weak void lmb_add_memory(void) +{ + int i; + phys_size_t size; + phys_addr_t rgn_top; + u64 ram_top = gd->ram_top; + struct bd_info *bd = gd->bd; + + /* Assume a 4GB ram_top if not defined */ + if (!ram_top) + ram_top = 0x100000000ULL; + + for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) { + size = bd->bi_dram[i].size; + if (size) { + if (bd->bi_dram[i].start > ram_top) + continue; + + rgn_top = bd->bi_dram[i].start + + bd->bi_dram[i].size; + + if (rgn_top > ram_top) + size -= rgn_top - ram_top; + + lmb_add(bd->bi_dram[i].start, size); + } + } +} + /* Initialize the struct, add memory and call arch/board reserve functions */ void lmb_init_and_reserve_range(phys_addr_t base, phys_size_t size, void *fdt_blob) @@ -728,5 +768,7 @@ int lmb_mem_regions_init(void) return -1; }
+ lmb_add_memory(); + return 0; }