![[PukiWiki]](image/pukiwiki.png "[PukiWiki]")
*参照元 [#zc032c09] #backlinks *説明 [#zd445570] -パス: [[linux-4.4.1/drivers/base/dma-contiguous.c]] -FIXME: これは何？ --説明 **引数 [#hfd05d97] -phys_addr_t limit -- --[[linux-4.4.1/phys_addr_t]] **返り値 [#w012b78a] -void **参考 [#n0705a6b] *実装 [#j6d349ab] /** * dma_contiguous_reserve() - reserve area(s) for contiguous memory handling * @limit: End address of the reserved memory (optional, 0 for any). * * This function reserves memory from early allocator. It should be * called by arch specific code once the early allocator (memblock or bootmem) * has been activated and all other subsystems have already allocated/reserved * memory. */ void __init dma_contiguous_reserve(phys_addr_t limit) { phys_addr_t selected_size = 0; phys_addr_t selected_base = 0; phys_addr_t selected_limit = limit; bool fixed = false; pr_debug("%s(limit %08lx)\n", __func__, (unsigned long)limit); - --[[linux-4.4.1/pr_debug()]] if (size_cmdline != -1) { selected_size = size_cmdline; selected_base = base_cmdline; selected_limit = min_not_zero(limit_cmdline, limit); if (base_cmdline + size_cmdline == limit_cmdline) fixed = true; - --[[linux-4.4.1/min_not_zero()]] --[[linux-4.4.1/size_cmdline(global)]] --[[linux-4.4.1/base_cmdline(global)]] --[[linux-4.4.1/limit_cmdline(global)]] } else { #ifdef CONFIG_CMA_SIZE_SEL_MBYTES selected_size = size_bytes; #elif defined(CONFIG_CMA_SIZE_SEL_PERCENTAGE) selected_size = cma_early_percent_memory(); #elif defined(CONFIG_CMA_SIZE_SEL_MIN) selected_size = min(size_bytes, cma_early_percent_memory()); #elif defined(CONFIG_CMA_SIZE_SEL_MAX) selected_size = max(size_bytes, cma_early_percent_memory()); #endif - --[[linux-4.4.1/CONFIG_CMA_SIZE_SEL_MBYTES]] --[[linux-4.4.1/size_bytes(global)]] --[[linux-4.4.1/CONFIG_CMA_SIZE_SEL_PERCENTAGE()]] --[[linux-4.4.1/cma_early_percent_memory()]] --[[linux-4.4.1/CONFIG_CMA_SIZE_SEL_MIN]] --[[linux-4.4.1/CONFIG_CMA_SIZE_SEL_MAX]] } if (selected_size && !dma_contiguous_default_area) { pr_debug("%s: reserving %ld MiB for global area\n", __func__, (unsigned long)selected_size / SZ_1M); - --[[linux-4.4.1/dma_contiguous_default_area(global)]] dma_contiguous_reserve_area(selected_size, selected_base, selected_limit, &dma_contiguous_default_area, fixed); } - --[[linux-4.4.1/dma_contiguous_reserve_area()]] } *コメント [#u2722247]
