riscv: Add support for memtest
The riscv [rv32_]defconfig enabled CONFIG_MEMTEST,
but memtest feature is not supported in RISCV.
Add early_memtest() to support for memtest.
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 067583a..7f5036f 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -128,8 +128,9 @@ void __init setup_bootmem(void)
if (max_mapped_addr == (dram_end - 1))
memblock_set_current_limit(max_mapped_addr - 4096);
- max_pfn = PFN_DOWN(dram_end);
- max_low_pfn = max_pfn;
+ min_low_pfn = PFN_UP(memblock_start_of_DRAM());
+ max_low_pfn = max_pfn = PFN_DOWN(dram_end);
+
dma32_phys_limit = min(4UL * SZ_1G, (unsigned long)PFN_PHYS(max_low_pfn));
set_max_mapnr(max_low_pfn - ARCH_PFN_OFFSET);
@@ -593,6 +594,7 @@ void __init paging_init(void)
void __init misc_mem_init(void)
{
+ early_memtest(min_low_pfn << PAGE_SHIFT, max_low_pfn << PAGE_SHIFT);
arch_numa_init();
sparse_init();
zone_sizes_init();