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MIPS: Let early memblock_alloc*() allocate memories bottom-up 

After switched to NO_BOOTMEM, there are several boot failures. Some of
them have been fixed and some of them haven't. I find that many of them
are because of memory allocations are top-down, while the old behavior
is bottom-up. This patch let early memblock_alloc*() allocate memories
bottom-up to avoid some potential problems.

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Fixes: bcec54bf31 ("mips: switch to NO_BOOTMEM")
Patchwork: https://patchwork.linux-mips.org/patch/21069/
References: https://patchwork.linux-mips.org/patch/21031/
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <james.hogan@mips.com>
Cc: Steven J . Hill <Steven.Hill@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
hifive-unleashed-5.1
Huacai Chen 2018-11-10 11:50:14 +08:00 committed by Paul Burton
parent 82fba2df7f
commit 25517ed4e9
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GPG Key ID: 3EA79FACB57500DD
2 changed files with 2 additions and 2 deletions
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1
arch/mips/kernel/setup.c
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@ -794,6 +794,7 @@ static void __init arch_mem_init(char **cmdline_p)
/* call board setup routine */
plat_mem_setup();
memblock_set_bottom_up(true);
/*
* Make sure all kernel memory is in the maps. The "UP" and

3
arch/mips/kernel/traps.c
View File

@ -2260,10 +2260,8 @@ void __init trap_init(void)
unsigned long size = 0x200 + VECTORSPACING*64;
phys_addr_t ebase_pa;
memblock_set_bottom_up(true);
ebase = (unsigned long)
memblock_alloc_from(size, 1 << fls(size), 0);
memblock_set_bottom_up(false);
/*
* Try to ensure ebase resides in KSeg0 if possible.
@ -2307,6 +2305,7 @@ void __init trap_init(void)
if (board_ebase_setup)
board_ebase_setup();
per_cpu_trap_init(true);
memblock_set_bottom_up(false);
/*
* Copy the generic exception handlers to their final destination.