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85xx: Add cpu_mp_lmb_reserve helper to reserve boot page

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Provide a board_lmb_reserve helper function to ensure we reserve
the page of memory we are using for the boot page translation code.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Kumar Gala 2008-03-26 08:53:53 -05:00 committed by Andrew Fleming-AFLEMING
parent 79679d8002
commit dd6c910aad
2 changed files with 15 additions and 0 deletions
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14
cpu/mpc85xx/mp.c
View file

@ -23,6 +23,7 @@
#include <common.h>
#include <asm/processor.h>
#include <ioports.h>
#include <lmb.h>
#include <asm/io.h>
#include "mp.h"
@ -177,6 +178,19 @@ static void pq3_mp_up(unsigned long bootpg)
out_be32(&gur->devdisr, devdisr);
}
void cpu_mp_lmb_reserve(struct lmb *lmb)
{
u32 bootpg;
/* if we have 4G or more of memory, put the boot page at 4Gb-4k */
if ((u64)gd->ram_size > 0xfffff000)
bootpg = 0xfffff000;
else
bootpg = gd->ram_size - 4096;
lmb_reserve(lmb, bootpg, 4096);
}
void setup_mp(void)
{
extern ulong __secondary_start_page;

1
cpu/mpc85xx/mp.h
View file

@ -4,6 +4,7 @@
ulong get_spin_addr(void);
void setup_mp(void);
u32 get_my_id(void);
void cpu_mp_lmb_reserve(struct lmb *lmb);
#define BOOT_ENTRY_ADDR_UPPER 0
#define BOOT_ENTRY_ADDR_LOWER 1