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MIPS: Malta: initialise MAARs

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Initialise the MAARs such that speculation is enabled for all physical
addresses outside of the I/O region.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7333/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton 2014-07-14 12:37:39 +01:00 committed by Ralf Baechle
parent ab9988a3da
commit 3a551e25df
1 changed files with 26 additions and 0 deletions
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26
arch/mips/mti-malta/malta-memory.c
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@ -16,6 +16,7 @@
#include <linux/string.h>
#include <asm/bootinfo.h>
#include <asm/maar.h>
#include <asm/sections.h>
#include <asm/fw/fw.h>
@ -164,3 +165,28 @@ void __init prom_free_prom_memory(void)
addr, addr + boot_mem_map.map[i].size);
}
}
unsigned platform_maar_init(unsigned num_pairs)
{
phys_addr_t mem_end = (physical_memsize & ~0xffffull) - 1;
struct maar_config cfg[] = {
/* DRAM preceding I/O */
{ 0x00000000, 0x0fffffff, MIPS_MAAR_S },
/* DRAM following I/O */
{ 0x20000000, mem_end, MIPS_MAAR_S },
/* DRAM alias in upper half of physical */
{ 0x80000000, 0x80000000 + mem_end, MIPS_MAAR_S },
};
unsigned i, num_cfg = ARRAY_SIZE(cfg);
/* If DRAM fits before I/O, drop the region following it */
if (physical_memsize <= 0x10000000) {
num_cfg--;
for (i = 1; i < num_cfg; i++)
cfg[i] = cfg[i + 1];
}
return maar_config(cfg, num_cfg, num_pairs);
}