85xx: Add cpu_mp_lmb_reserve helper to reserve boot page
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>
diff --git a/cpu/mpc85xx/mp.c b/cpu/mpc85xx/mp.c
index d3727b0..7b10fba 100644
--- a/cpu/mpc85xx/mp.c
+++ b/cpu/mpc85xx/mp.c
@@ -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 @@
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;
diff --git a/cpu/mpc85xx/mp.h b/cpu/mpc85xx/mp.h
index b762ee2..4329286 100644
--- a/cpu/mpc85xx/mp.h
+++ b/cpu/mpc85xx/mp.h
@@ -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