[PATCH RESEND v4 7/9] MIPS: Loongson-1A: Enable SPARSEMEN and HIGHMEM

[Binbin Zhou <zhoubb@lemote.com>]

Signed-off-by: Chunbo Cui <cuichboo@163.com>
Signed-off-by: Binbin Zhou <zhoubb@lemote.com>
Signed-off-by: Huacai Chen <chenhc@lemote.com>
---
 arch/mips/include/asm/sparsemem.h   | 6 +++++-
 arch/mips/loongson32/Kconfig        | 1 +
 arch/mips/loongson32/common/setup.c | 3 ++-
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/arch/mips/include/asm/sparsemem.h b/arch/mips/include/asm/sparsemem.h
index b1071c1..f73e671 100644
--- a/arch/mips/include/asm/sparsemem.h
+++ b/arch/mips/include/asm/sparsemem.h
@@ -11,7 +11,11 @@
 #else
 # define SECTION_SIZE_BITS	28
 #endif
-#define MAX_PHYSMEM_BITS	48
+#ifdef CONFIG_64BIT
+# define MAX_PHYSMEM_BITS	48
+#else
+# define MAX_PHYSMEM_BITS	36
+#endif
 
 #endif /* CONFIG_SPARSEMEM */
 #endif /* _MIPS_SPARSEMEM_H */
diff --git a/arch/mips/loongson32/Kconfig b/arch/mips/loongson32/Kconfig
index 35effa8..0b5a125 100644
--- a/arch/mips/loongson32/Kconfig
+++ b/arch/mips/loongson32/Kconfig
@@ -7,6 +7,7 @@ config LOONGSON1_LS1A
 	bool "Loongson LS1A board"
 	select CEVT_R4K
 	select CSRC_R4K
+	select ARCH_SPARSEMEM_ENABLE
 	select SYS_HAS_CPU_LOONGSON1A
 	select DMA_NONCOHERENT
 	select BOOT_ELF32
diff --git a/arch/mips/loongson32/common/setup.c b/arch/mips/loongson32/common/setup.c
index 95b0155..af9ccee 100644
--- a/arch/mips/loongson32/common/setup.c
+++ b/arch/mips/loongson32/common/setup.c
@@ -54,7 +54,8 @@ void __init plat_mem_setup(void)
 		.orig_video_points	= 16,
 	};
 #endif
-	add_memory_region(0x20000000, 0x30000000, BOOT_MEM_RESERVED);
+	if (highmemsize > 0)
+		add_memory_region(0x50000000, highmemsize << 20, BOOT_MEM_RAM);
 #endif
 }
 
-- 
1.9.1